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         $path_info =~ s,^$project/*,,;
 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_blame2,
 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                 $href .= "/$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         # allow only $len chars, but don't cut a word if it would fit in $add_len
 870         # if it doesn't fit, cut it if it's still longer than the dots we would add
 871         # remove chopped character entities entirely
 872
 873         # when chopping in the middle, distribute $len into left and right part
 874         # return early if chopping wouldn't make string shorter
 875         if ($where eq 'center') {
 876                 return $str if ($len + 5 >= length($str)); # filler is length 5
 877                 $len = int($len/2);
 878         } else {
 879                 return $str if ($len + 4 >= length($str)); # filler is length 4
 880         }
 881
 882         # regexps: ending and beginning with word part up to $add_len
 883         my $endre = qr/.{$len}\w{0,$add_len}/;
 884         my $begre = qr/\w{0,$add_len}.{$len}/;
 885
 886         if ($where eq 'left') {
 887                 $str =~ m/^(.*?)($begre)$/;
 888                 my ($lead, $body) = ($1, $2);
 889                 if (length($lead) > 4) {
 890                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 891                         $lead = " ...";
 892                 }
 893                 return "$lead$body";
 894
 895         } elsif ($where eq 'center') {
 896                 $str =~ m/^($endre)(.*)$/;
 897                 my ($left, $str)  = ($1, $2);
 898                 $str =~ m/^(.*?)($begre)$/;
 899                 my ($mid, $right) = ($1, $2);
 900                 if (length($mid) > 5) {
 901                         $left  =~ s/&[^;]*$//;
 902                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 903                         $mid = " ... ";
 904                 }
 905                 return "$left$mid$right";
 906
 907         } else {
 908                 $str =~ m/^($endre)(.*)$/;
 909                 my $body = $1;
 910                 my $tail = $2;
 911                 if (length($tail) > 4) {
 912                         $body =~ s/&[^;]*$//;
 913                         $tail = "... ";
 914                 }
 915                 return "$body$tail";
 916         }
 917 }
 918
 919 # takes the same arguments as chop_str, but also wraps a <span> around the
 920 # result with a title attribute if it does get chopped. Additionally, the
 921 # string is HTML-escaped.
 922 sub chop_and_escape_str {
 923         my ($str) = @_;
 924
 925         my $chopped = chop_str(@_);
 926         if ($chopped eq $str) {
 927                 return esc_html($chopped);
 928         } else {
 929                 $str =~ s/([[:cntrl:]])/?/g;
 930                 return $cgi->span({-title=>$str}, esc_html($chopped));
 931         }
 932 }
 933
 934 ## ----------------------------------------------------------------------
 935 ## functions returning short strings
 936
 937 # CSS class for given age value (in seconds)
 938 sub age_class {
 939         my $age = shift;
 940
 941         if (!defined $age) {
 942                 return "noage";
 943         } elsif ($age < 60*60*2) {
 944                 return "age0";
 945         } elsif ($age < 60*60*24*2) {
 946                 return "age1";
 947         } else {
 948                 return "age2";
 949         }
 950 }
 951
 952 # convert age in seconds to "nn units ago" string
 953 sub age_string {
 954         my $age = shift;
 955         my $age_str;
 956
 957         if ($age > 60*60*24*365*2) {
 958                 $age_str = (int $age/60/60/24/365);
 959                 $age_str .= " years ago";
 960         } elsif ($age > 60*60*24*(365/12)*2) {
 961                 $age_str = int $age/60/60/24/(365/12);
 962                 $age_str .= " months ago";
 963         } elsif ($age > 60*60*24*7*2) {
 964                 $age_str = int $age/60/60/24/7;
 965                 $age_str .= " weeks ago";
 966         } elsif ($age > 60*60*24*2) {
 967                 $age_str = int $age/60/60/24;
 968                 $age_str .= " days ago";
 969         } elsif ($age > 60*60*2) {
 970                 $age_str = int $age/60/60;
 971                 $age_str .= " hours ago";
 972         } elsif ($age > 60*2) {
 973                 $age_str = int $age/60;
 974                 $age_str .= " min ago";
 975         } elsif ($age > 2) {
 976                 $age_str = int $age;
 977                 $age_str .= " sec ago";
 978         } else {
 979                 $age_str .= " right now";
 980         }
 981         return $age_str;
 982 }
 983
 984 use constant {
 985         S_IFINVALID => 0030000,
 986         S_IFGITLINK => 0160000,
 987 };
 988
 989 # submodule/subproject, a commit object reference
 990 sub S_ISGITLINK($) {
 991         my $mode = shift;
 992
 993         return (($mode & S_IFMT) == S_IFGITLINK)
 994 }
 995
 996 # convert file mode in octal to symbolic file mode string
 997 sub mode_str {
 998         my $mode = oct shift;
 999
1000         if (S_ISGITLINK($mode)) {
1001                 return 'm---------';
1002         } elsif (S_ISDIR($mode & S_IFMT)) {
1003                 return 'drwxr-xr-x';
1004         } elsif (S_ISLNK($mode)) {
1005                 return 'lrwxrwxrwx';
1006         } elsif (S_ISREG($mode)) {
1007                 # git cares only about the executable bit
1008                 if ($mode & S_IXUSR) {
1009                         return '-rwxr-xr-x';
1010                 } else {
1011                         return '-rw-r--r--';
1012                 };
1013         } else {
1014                 return '----------';
1015         }
1016 }
1017
1018 # convert file mode in octal to file type string
1019 sub file_type {
1020         my $mode = shift;
1021
1022         if ($mode !~ m/^[0-7]+$/) {
1023                 return $mode;
1024         } else {
1025                 $mode = oct $mode;
1026         }
1027
1028         if (S_ISGITLINK($mode)) {
1029                 return "submodule";
1030         } elsif (S_ISDIR($mode & S_IFMT)) {
1031                 return "directory";
1032         } elsif (S_ISLNK($mode)) {
1033                 return "symlink";
1034         } elsif (S_ISREG($mode)) {
1035                 return "file";
1036         } else {
1037                 return "unknown";
1038         }
1039 }
1040
1041 # convert file mode in octal to file type description string
1042 sub file_type_long {
1043         my $mode = shift;
1044
1045         if ($mode !~ m/^[0-7]+$/) {
1046                 return $mode;
1047         } else {
1048                 $mode = oct $mode;
1049         }
1050
1051         if (S_ISGITLINK($mode)) {
1052                 return "submodule";
1053         } elsif (S_ISDIR($mode & S_IFMT)) {
1054                 return "directory";
1055         } elsif (S_ISLNK($mode)) {
1056                 return "symlink";
1057         } elsif (S_ISREG($mode)) {
1058                 if ($mode & S_IXUSR) {
1059                         return "executable";
1060                 } else {
1061                         return "file";
1062                 };
1063         } else {
1064                 return "unknown";
1065         }
1066 }
1067
1068
1069 ## ----------------------------------------------------------------------
1070 ## functions returning short HTML fragments, or transforming HTML fragments
1071 ## which don't belong to other sections
1072
1073 # format line of commit message.
1074 sub format_log_line_html {
1075         my $line = shift;
1076
1077         $line = esc_html($line, -nbsp=>1);
1078         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1079                 my $hash_text = $1;
1080                 my $link =
1081                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1082                                 -class => "text"}, $hash_text);
1083                 $line =~ s/$hash_text/$link/;
1084         }
1085         return $line;
1086 }
1087
1088 # format marker of refs pointing to given object
1089 sub format_ref_marker {
1090         my ($refs, $id) = @_;
1091         my $markers = '';
1092
1093         if (defined $refs->{$id}) {
1094                 foreach my $ref (@{$refs->{$id}}) {
1095                         my ($type, $name) = qw();
1096                         # e.g. tags/v2.6.11 or heads/next
1097                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1098                                 $type = $1;
1099                                 $name = $2;
1100                         } else {
1101                                 $type = "ref";
1102                                 $name = $ref;
1103                         }
1104
1105                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1106                                     esc_html($name) . "</span>";
1107                 }
1108         }
1109
1110         if ($markers) {
1111                 return ' <span class="refs">'. $markers . '</span>';
1112         } else {
1113                 return "";
1114         }
1115 }
1116
1117 # format, perhaps shortened and with markers, title line
1118 sub format_subject_html {
1119         my ($long, $short, $href, $extra) = @_;
1120         $extra = '' unless defined($extra);
1121
1122         if (length($short) < length($long)) {
1123                 return $cgi->a({-href => $href, -class => "list subject",
1124                                 -title => to_utf8($long)},
1125                        esc_html($short) . $extra);
1126         } else {
1127                 return $cgi->a({-href => $href, -class => "list subject"},
1128                        esc_html($long)  . $extra);
1129         }
1130 }
1131
1132 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1133 sub format_git_diff_header_line {
1134         my $line = shift;
1135         my $diffinfo = shift;
1136         my ($from, $to) = @_;
1137
1138         if ($diffinfo->{'nparents'}) {
1139                 # combined diff
1140                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1141                 if ($to->{'href'}) {
1142                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1143                                          esc_path($to->{'file'}));
1144                 } else { # file was deleted (no href)
1145                         $line .= esc_path($to->{'file'});
1146                 }
1147         } else {
1148                 # "ordinary" diff
1149                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1150                 if ($from->{'href'}) {
1151                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1152                                          'a/' . esc_path($from->{'file'}));
1153                 } else { # file was added (no href)
1154                         $line .= 'a/' . esc_path($from->{'file'});
1155                 }
1156                 $line .= ' ';
1157                 if ($to->{'href'}) {
1158                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1159                                          'b/' . esc_path($to->{'file'}));
1160                 } else { # file was deleted
1161                         $line .= 'b/' . esc_path($to->{'file'});
1162                 }
1163         }
1164
1165         return "<div class=\"diff header\">$line</div>\n";
1166 }
1167
1168 # format extended diff header line, before patch itself
1169 sub format_extended_diff_header_line {
1170         my $line = shift;
1171         my $diffinfo = shift;
1172         my ($from, $to) = @_;
1173
1174         # match <path>
1175         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1176                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1177                                        esc_path($from->{'file'}));
1178         }
1179         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1180                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1181                                  esc_path($to->{'file'}));
1182         }
1183         # match single <mode>
1184         if ($line =~ m/\s(\d{6})$/) {
1185                 $line .= '<span class="info"> (' .
1186                          file_type_long($1) .
1187                          ')</span>';
1188         }
1189         # match <hash>
1190         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1191                 # can match only for combined diff
1192                 $line = 'index ';
1193                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1194                         if ($from->{'href'}[$i]) {
1195                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1196                                                   -class=>"hash"},
1197                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1198                         } else {
1199                                 $line .= '0' x 7;
1200                         }
1201                         # separator
1202                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1203                 }
1204                 $line .= '..';
1205                 if ($to->{'href'}) {
1206                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1207                                          substr($diffinfo->{'to_id'},0,7));
1208                 } else {
1209                         $line .= '0' x 7;
1210                 }
1211
1212         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1213                 # can match only for ordinary diff
1214                 my ($from_link, $to_link);
1215                 if ($from->{'href'}) {
1216                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1217                                              substr($diffinfo->{'from_id'},0,7));
1218                 } else {
1219                         $from_link = '0' x 7;
1220                 }
1221                 if ($to->{'href'}) {
1222                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1223                                            substr($diffinfo->{'to_id'},0,7));
1224                 } else {
1225                         $to_link = '0' x 7;
1226                 }
1227                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1228                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1229         }
1230
1231         return $line . "<br/>\n";
1232 }
1233
1234 # format from-file/to-file diff header
1235 sub format_diff_from_to_header {
1236         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1237         my $line;
1238         my $result = '';
1239
1240         $line = $from_line;
1241         #assert($line =~ m/^---/) if DEBUG;
1242         # no extra formatting for "^--- /dev/null"
1243         if (! $diffinfo->{'nparents'}) {
1244                 # ordinary (single parent) diff
1245                 if ($line =~ m!^--- "?a/!) {
1246                         if ($from->{'href'}) {
1247                                 $line = '--- a/' .
1248                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1249                                                 esc_path($from->{'file'}));
1250                         } else {
1251                                 $line = '--- a/' .
1252                                         esc_path($from->{'file'});
1253                         }
1254                 }
1255                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1256
1257         } else {
1258                 # combined diff (merge commit)
1259                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1260                         if ($from->{'href'}[$i]) {
1261                                 $line = '--- ' .
1262                                         $cgi->a({-href=>href(action=>"blobdiff",
1263                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1264                                                              hash_parent_base=>$parents[$i],
1265                                                              file_parent=>$from->{'file'}[$i],
1266                                                              hash=>$diffinfo->{'to_id'},
1267                                                              hash_base=>$hash,
1268                                                              file_name=>$to->{'file'}),
1269                                                  -class=>"path",
1270                                                  -title=>"diff" . ($i+1)},
1271                                                 $i+1) .
1272                                         '/' .
1273                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1274                                                 esc_path($from->{'file'}[$i]));
1275                         } else {
1276                                 $line = '--- /dev/null';
1277                         }
1278                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1279                 }
1280         }
1281
1282         $line = $to_line;
1283         #assert($line =~ m/^\+\+\+/) if DEBUG;
1284         # no extra formatting for "^+++ /dev/null"
1285         if ($line =~ m!^\+\+\+ "?b/!) {
1286                 if ($to->{'href'}) {
1287                         $line = '+++ b/' .
1288                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1289                                         esc_path($to->{'file'}));
1290                 } else {
1291                         $line = '+++ b/' .
1292                                 esc_path($to->{'file'});
1293                 }
1294         }
1295         $result .= qq!<div class="diff to_file">$line</div>\n!;
1296
1297         return $result;
1298 }
1299
1300 # create note for patch simplified by combined diff
1301 sub format_diff_cc_simplified {
1302         my ($diffinfo, @parents) = @_;
1303         my $result = '';
1304
1305         $result .= "<div class=\"diff header\">" .
1306                    "diff --cc ";
1307         if (!is_deleted($diffinfo)) {
1308                 $result .= $cgi->a({-href => href(action=>"blob",
1309                                                   hash_base=>$hash,
1310                                                   hash=>$diffinfo->{'to_id'},
1311                                                   file_name=>$diffinfo->{'to_file'}),
1312                                     -class => "path"},
1313                                    esc_path($diffinfo->{'to_file'}));
1314         } else {
1315                 $result .= esc_path($diffinfo->{'to_file'});
1316         }
1317         $result .= "</div>\n" . # class="diff header"
1318                    "<div class=\"diff nodifferences\">" .
1319                    "Simple merge" .
1320                    "</div>\n"; # class="diff nodifferences"
1321
1322         return $result;
1323 }
1324
1325 # format patch (diff) line (not to be used for diff headers)
1326 sub format_diff_line {
1327         my $line = shift;
1328         my ($from, $to) = @_;
1329         my $diff_class = "";
1330
1331         chomp $line;
1332
1333         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1334                 # combined diff
1335                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1336                 if ($line =~ m/^\@{3}/) {
1337                         $diff_class = " chunk_header";
1338                 } elsif ($line =~ m/^\\/) {
1339                         $diff_class = " incomplete";
1340                 } elsif ($prefix =~ tr/+/+/) {
1341                         $diff_class = " add";
1342                 } elsif ($prefix =~ tr/-/-/) {
1343                         $diff_class = " rem";
1344                 }
1345         } else {
1346                 # assume ordinary diff
1347                 my $char = substr($line, 0, 1);
1348                 if ($char eq '+') {
1349                         $diff_class = " add";
1350                 } elsif ($char eq '-') {
1351                         $diff_class = " rem";
1352                 } elsif ($char eq '@') {
1353                         $diff_class = " chunk_header";
1354                 } elsif ($char eq "\\") {
1355                         $diff_class = " incomplete";
1356                 }
1357         }
1358         $line = untabify($line);
1359         if ($from && $to && $line =~ m/^\@{2} /) {
1360                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1361                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1362
1363                 $from_lines = 0 unless defined $from_lines;
1364                 $to_lines   = 0 unless defined $to_lines;
1365
1366                 if ($from->{'href'}) {
1367                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1368                                              -class=>"list"}, $from_text);
1369                 }
1370                 if ($to->{'href'}) {
1371                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1372                                              -class=>"list"}, $to_text);
1373                 }
1374                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1375                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1376                 return "<div class=\"diff$diff_class\">$line</div>\n";
1377         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1378                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1379                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1380
1381                 @from_text = split(' ', $ranges);
1382                 for (my $i = 0; $i < @from_text; ++$i) {
1383                         ($from_start[$i], $from_nlines[$i]) =
1384                                 (split(',', substr($from_text[$i], 1)), 0);
1385                 }
1386
1387                 $to_text   = pop @from_text;
1388                 $to_start  = pop @from_start;
1389                 $to_nlines = pop @from_nlines;
1390
1391                 $line = "<span class=\"chunk_info\">$prefix ";
1392                 for (my $i = 0; $i < @from_text; ++$i) {
1393                         if ($from->{'href'}[$i]) {
1394                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1395                                                   -class=>"list"}, $from_text[$i]);
1396                         } else {
1397                                 $line .= $from_text[$i];
1398                         }
1399                         $line .= " ";
1400                 }
1401                 if ($to->{'href'}) {
1402                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1403                                           -class=>"list"}, $to_text);
1404                 } else {
1405                         $line .= $to_text;
1406                 }
1407                 $line .= " $prefix</span>" .
1408                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1409                 return "<div class=\"diff$diff_class\">$line</div>\n";
1410         }
1411         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1412 }
1413
1414 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1415 # linked.  Pass the hash of the tree/commit to snapshot.
1416 sub format_snapshot_links {
1417         my ($hash) = @_;
1418         my @snapshot_fmts = gitweb_check_feature('snapshot');
1419         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1420         my $num_fmts = @snapshot_fmts;
1421         if ($num_fmts > 1) {
1422                 # A parenthesized list of links bearing format names.
1423                 # e.g. "snapshot (_tar.gz_ _zip_)"
1424                 return "snapshot (" . join(' ', map
1425                         $cgi->a({
1426                                 -href => href(
1427                                         action=>"snapshot",
1428                                         hash=>$hash,
1429                                         snapshot_format=>$_
1430                                 )
1431                         }, $known_snapshot_formats{$_}{'display'})
1432                 , @snapshot_fmts) . ")";
1433         } elsif ($num_fmts == 1) {
1434                 # A single "snapshot" link whose tooltip bears the format name.
1435                 # i.e. "_snapshot_"
1436                 my ($fmt) = @snapshot_fmts;
1437                 return
1438                         $cgi->a({
1439                                 -href => href(
1440                                         action=>"snapshot",
1441                                         hash=>$hash,
1442                                         snapshot_format=>$fmt
1443                                 ),
1444                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1445                         }, "snapshot");
1446         } else { # $num_fmts == 0
1447                 return undef;
1448         }
1449 }
1450
1451 ## ----------------------------------------------------------------------
1452 ## git utility subroutines, invoking git commands
1453
1454 # returns path to the core git executable and the --git-dir parameter as list
1455 sub git_cmd {
1456         return $GIT, '--git-dir='.$git_dir;
1457 }
1458
1459 # returns path to the core git executable and the --git-dir parameter as string
1460 sub git_cmd_str {
1461         return join(' ', git_cmd());
1462 }
1463
1464 # get HEAD ref of given project as hash
1465 sub git_get_head_hash {
1466         my $project = shift;
1467         my $o_git_dir = $git_dir;
1468         my $retval = undef;
1469         $git_dir = "$projectroot/$project";
1470         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1471                 my $head = <$fd>;
1472                 close $fd;
1473                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1474                         $retval = $1;
1475                 }
1476         }
1477         if (defined $o_git_dir) {
1478                 $git_dir = $o_git_dir;
1479         }
1480         return $retval;
1481 }
1482
1483 # get type of given object
1484 sub git_get_type {
1485         my $hash = shift;
1486
1487         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1488         my $type = <$fd>;
1489         close $fd or return;
1490         chomp $type;
1491         return $type;
1492 }
1493
1494 # repository configuration
1495 our $config_file = '';
1496 our %config;
1497
1498 # store multiple values for single key as anonymous array reference
1499 # single values stored directly in the hash, not as [ <value> ]
1500 sub hash_set_multi {
1501         my ($hash, $key, $value) = @_;
1502
1503         if (!exists $hash->{$key}) {
1504                 $hash->{$key} = $value;
1505         } elsif (!ref $hash->{$key}) {
1506                 $hash->{$key} = [ $hash->{$key}, $value ];
1507         } else {
1508                 push @{$hash->{$key}}, $value;
1509         }
1510 }
1511
1512 # return hash of git project configuration
1513 # optionally limited to some section, e.g. 'gitweb'
1514 sub git_parse_project_config {
1515         my $section_regexp = shift;
1516         my %config;
1517
1518         local $/ = "\0";
1519
1520         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1521                 or return;
1522
1523         while (my $keyval = <$fh>) {
1524                 chomp $keyval;
1525                 my ($key, $value) = split(/\n/, $keyval, 2);
1526
1527                 hash_set_multi(\%config, $key, $value)
1528                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1529         }
1530         close $fh;
1531
1532         return %config;
1533 }
1534
1535 # convert config value to boolean, 'true' or 'false'
1536 # no value, number > 0, 'true' and 'yes' values are true
1537 # rest of values are treated as false (never as error)
1538 sub config_to_bool {
1539         my $val = shift;
1540
1541         # strip leading and trailing whitespace
1542         $val =~ s/^\s+//;
1543         $val =~ s/\s+$//;
1544
1545         return (!defined $val ||               # section.key
1546                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1547                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1548 }
1549
1550 # convert config value to simple decimal number
1551 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1552 # to be multiplied by 1024, 1048576, or 1073741824
1553 sub config_to_int {
1554         my $val = shift;
1555
1556         # strip leading and trailing whitespace
1557         $val =~ s/^\s+//;
1558         $val =~ s/\s+$//;
1559
1560         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1561                 $unit = lc($unit);
1562                 # unknown unit is treated as 1
1563                 return $num * ($unit eq 'g' ? 1073741824 :
1564                                $unit eq 'm' ?    1048576 :
1565                                $unit eq 'k' ?       1024 : 1);
1566         }
1567         return $val;
1568 }
1569
1570 # convert config value to array reference, if needed
1571 sub config_to_multi {
1572         my $val = shift;
1573
1574         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1575 }
1576
1577 sub git_get_project_config {
1578         my ($key, $type) = @_;
1579
1580         # key sanity check
1581         return unless ($key);
1582         $key =~ s/^gitweb\.//;
1583         return if ($key =~ m/\W/);
1584
1585         # type sanity check
1586         if (defined $type) {
1587                 $type =~ s/^--//;
1588                 $type = undef
1589                         unless ($type eq 'bool' || $type eq 'int');
1590         }
1591
1592         # get config
1593         if (!defined $config_file ||
1594             $config_file ne "$git_dir/config") {
1595                 %config = git_parse_project_config('gitweb');
1596                 $config_file = "$git_dir/config";
1597         }
1598
1599         # ensure given type
1600         if (!defined $type) {
1601                 return $config{"gitweb.$key"};
1602         } elsif ($type eq 'bool') {
1603                 # backward compatibility: 'git config --bool' returns true/false
1604                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1605         } elsif ($type eq 'int') {
1606                 return config_to_int($config{"gitweb.$key"});
1607         }
1608         return $config{"gitweb.$key"};
1609 }
1610
1611 # get hash of given path at given ref
1612 sub git_get_hash_by_path {
1613         my $base = shift;
1614         my $path = shift || return undef;
1615         my $type = shift;
1616
1617         $path =~ s,/+$,,;
1618
1619         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1620                 or die_error(undef, "Open git-ls-tree failed");
1621         my $line = <$fd>;
1622         close $fd or return undef;
1623
1624         if (!defined $line) {
1625                 # there is no tree or hash given by $path at $base
1626                 return undef;
1627         }
1628
1629         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1630         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1631         if (defined $type && $type ne $2) {
1632                 # type doesn't match
1633                 return undef;
1634         }
1635         return $3;
1636 }
1637
1638 # get path of entry with given hash at given tree-ish (ref)
1639 # used to get 'from' filename for combined diff (merge commit) for renames
1640 sub git_get_path_by_hash {
1641         my $base = shift || return;
1642         my $hash = shift || return;
1643
1644         local $/ = "\0";
1645
1646         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1647                 or return undef;
1648         while (my $line = <$fd>) {
1649                 chomp $line;
1650
1651                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1652                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1653                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1654                         close $fd;
1655                         return $1;
1656                 }
1657         }
1658         close $fd;
1659         return undef;
1660 }
1661
1662 ## ......................................................................
1663 ## git utility functions, directly accessing git repository
1664
1665 sub git_get_project_description {
1666         my $path = shift;
1667
1668         $git_dir = "$projectroot/$path";
1669         open my $fd, "$git_dir/description"
1670                 or return git_get_project_config('description');
1671         my $descr = <$fd>;
1672         close $fd;
1673         if (defined $descr) {
1674                 chomp $descr;
1675         }
1676         return $descr;
1677 }
1678
1679 sub git_get_project_url_list {
1680         my $path = shift;
1681
1682         $git_dir = "$projectroot/$path";
1683         open my $fd, "$git_dir/cloneurl"
1684                 or return wantarray ?
1685                 @{ config_to_multi(git_get_project_config('url')) } :
1686                    config_to_multi(git_get_project_config('url'));
1687         my @git_project_url_list = map { chomp; $_ } <$fd>;
1688         close $fd;
1689
1690         return wantarray ? @git_project_url_list : \@git_project_url_list;
1691 }
1692
1693 sub git_get_projects_list {
1694         my ($filter) = @_;
1695         my @list;
1696
1697         $filter ||= '';
1698         $filter =~ s/\.git$//;
1699
1700         my ($check_forks) = gitweb_check_feature('forks');
1701
1702         if (-d $projects_list) {
1703                 # search in directory
1704                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1705                 # remove the trailing "/"
1706                 $dir =~ s!/+$!!;
1707                 my $pfxlen = length("$dir");
1708                 my $pfxdepth = ($dir =~ tr!/!!);
1709
1710                 File::Find::find({
1711                         follow_fast => 1, # follow symbolic links
1712                         follow_skip => 2, # ignore duplicates
1713                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1714                         wanted => sub {
1715                                 # skip project-list toplevel, if we get it.
1716                                 return if (m!^[/.]$!);
1717                                 # only directories can be git repositories
1718                                 return unless (-d $_);
1719                                 # don't traverse too deep (Find is super slow on os x)
1720                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1721                                         $File::Find::prune = 1;
1722                                         return;
1723                                 }
1724
1725                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1726                                 # we check related file in $projectroot
1727                                 if ($check_forks and $subdir =~ m#/.#) {
1728                                         $File::Find::prune = 1;
1729                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1730                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1731                                         $File::Find::prune = 1;
1732                                 }
1733                         },
1734                 }, "$dir");
1735
1736         } elsif (-f $projects_list) {
1737                 # read from file(url-encoded):
1738                 # 'git%2Fgit.git Linus+Torvalds'
1739                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1740                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1741                 my %paths;
1742                 open my ($fd), $projects_list or return;
1743         PROJECT:
1744                 while (my $line = <$fd>) {
1745                         chomp $line;
1746                         my ($path, $owner) = split ' ', $line;
1747                         $path = unescape($path);
1748                         $owner = unescape($owner);
1749                         if (!defined $path) {
1750                                 next;
1751                         }
1752                         if ($filter ne '') {
1753                                 # looking for forks;
1754                                 my $pfx = substr($path, 0, length($filter));
1755                                 if ($pfx ne $filter) {
1756                                         next PROJECT;
1757                                 }
1758                                 my $sfx = substr($path, length($filter));
1759                                 if ($sfx !~ /^\/.*\.git$/) {
1760                                         next PROJECT;
1761                                 }
1762                         } elsif ($check_forks) {
1763                         PATH:
1764                                 foreach my $filter (keys %paths) {
1765                                         # looking for forks;
1766                                         my $pfx = substr($path, 0, length($filter));
1767                                         if ($pfx ne $filter) {
1768                                                 next PATH;
1769                                         }
1770                                         my $sfx = substr($path, length($filter));
1771                                         if ($sfx !~ /^\/.*\.git$/) {
1772                                                 next PATH;
1773                                         }
1774                                         # is a fork, don't include it in
1775                                         # the list
1776                                         next PROJECT;
1777                                 }
1778                         }
1779                         if (check_export_ok("$projectroot/$path")) {
1780                                 my $pr = {
1781                                         path => $path,
1782                                         owner => to_utf8($owner),
1783                                 };
1784                                 push @list, $pr;
1785                                 (my $forks_path = $path) =~ s/\.git$//;
1786                                 $paths{$forks_path}++;
1787                         }
1788                 }
1789                 close $fd;
1790         }
1791         return @list;
1792 }
1793
1794 our $gitweb_project_owner = undef;
1795 sub git_get_project_list_from_file {
1796
1797         return if (defined $gitweb_project_owner);
1798
1799         $gitweb_project_owner = {};
1800         # read from file (url-encoded):
1801         # 'git%2Fgit.git Linus+Torvalds'
1802         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1803         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1804         if (-f $projects_list) {
1805                 open (my $fd , $projects_list);
1806                 while (my $line = <$fd>) {
1807                         chomp $line;
1808                         my ($pr, $ow) = split ' ', $line;
1809                         $pr = unescape($pr);
1810                         $ow = unescape($ow);
1811                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1812                 }
1813                 close $fd;
1814         }
1815 }
1816
1817 sub git_get_project_owner {
1818         my $project = shift;
1819         my $owner;
1820
1821         return undef unless $project;
1822         $git_dir = "$projectroot/$project";
1823
1824         if (!defined $gitweb_project_owner) {
1825                 git_get_project_list_from_file();
1826         }
1827
1828         if (exists $gitweb_project_owner->{$project}) {
1829                 $owner = $gitweb_project_owner->{$project};
1830         }
1831         if (!defined $owner){
1832                 $owner = git_get_project_config('owner');
1833         }
1834         if (!defined $owner) {
1835                 $owner = get_file_owner("$git_dir");
1836         }
1837
1838         return $owner;
1839 }
1840
1841 sub git_get_last_activity {
1842         my ($path) = @_;
1843         my $fd;
1844
1845         $git_dir = "$projectroot/$path";
1846         open($fd, "-|", git_cmd(), 'for-each-ref',
1847              '--format=%(committer)',
1848              '--sort=-committerdate',
1849              '--count=1',
1850              'refs/heads') or return;
1851         my $most_recent = <$fd>;
1852         close $fd or return;
1853         if (defined $most_recent &&
1854             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1855                 my $timestamp = $1;
1856                 my $age = time - $timestamp;
1857                 return ($age, age_string($age));
1858         }
1859         return (undef, undef);
1860 }
1861
1862 sub git_get_references {
1863         my $type = shift || "";
1864         my %refs;
1865         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1866         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1867         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1868                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1869                 or return;
1870
1871         while (my $line = <$fd>) {
1872                 chomp $line;
1873                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1874                         if (defined $refs{$1}) {
1875                                 push @{$refs{$1}}, $2;
1876                         } else {
1877                                 $refs{$1} = [ $2 ];
1878                         }
1879                 }
1880         }
1881         close $fd or return;
1882         return \%refs;
1883 }
1884
1885 sub git_get_rev_name_tags {
1886         my $hash = shift || return undef;
1887
1888         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1889                 or return;
1890         my $name_rev = <$fd>;
1891         close $fd;
1892
1893         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1894                 return $1;
1895         } else {
1896                 # catches also '$hash undefined' output
1897                 return undef;
1898         }
1899 }
1900
1901 ## ----------------------------------------------------------------------
1902 ## parse to hash functions
1903
1904 sub parse_date {
1905         my $epoch = shift;
1906         my $tz = shift || "-0000";
1907
1908         my %date;
1909         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1910         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1911         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1912         $date{'hour'} = $hour;
1913         $date{'minute'} = $min;
1914         $date{'mday'} = $mday;
1915         $date{'day'} = $days[$wday];
1916         $date{'month'} = $months[$mon];
1917         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1918                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1919         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1920                              $mday, $months[$mon], $hour ,$min;
1921         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1922                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1923
1924         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1925         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1926         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1927         $date{'hour_local'} = $hour;
1928         $date{'minute_local'} = $min;
1929         $date{'tz_local'} = $tz;
1930         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1931                                   1900+$year, $mon+1, $mday,
1932                                   $hour, $min, $sec, $tz);
1933         return %date;
1934 }
1935
1936 sub parse_tag {
1937         my $tag_id = shift;
1938         my %tag;
1939         my @comment;
1940
1941         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1942         $tag{'id'} = $tag_id;
1943         while (my $line = <$fd>) {
1944                 chomp $line;
1945                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1946                         $tag{'object'} = $1;
1947                 } elsif ($line =~ m/^type (.+)$/) {
1948                         $tag{'type'} = $1;
1949                 } elsif ($line =~ m/^tag (.+)$/) {
1950                         $tag{'name'} = $1;
1951                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1952                         $tag{'author'} = $1;
1953                         $tag{'epoch'} = $2;
1954                         $tag{'tz'} = $3;
1955                 } elsif ($line =~ m/--BEGIN/) {
1956                         push @comment, $line;
1957                         last;
1958                 } elsif ($line eq "") {
1959                         last;
1960                 }
1961         }
1962         push @comment, <$fd>;
1963         $tag{'comment'} = \@comment;
1964         close $fd or return;
1965         if (!defined $tag{'name'}) {
1966                 return
1967         };
1968         return %tag
1969 }
1970
1971 sub parse_commit_text {
1972         my ($commit_text, $withparents) = @_;
1973         my @commit_lines = split '\n', $commit_text;
1974         my %co;
1975
1976         pop @commit_lines; # Remove '\0'
1977
1978         if (! @commit_lines) {
1979                 return;
1980         }
1981
1982         my $header = shift @commit_lines;
1983         if ($header !~ m/^[0-9a-fA-F]{40}/) {
1984                 return;
1985         }
1986         ($co{'id'}, my @parents) = split ' ', $header;
1987         while (my $line = shift @commit_lines) {
1988                 last if $line eq "\n";
1989                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
1990                         $co{'tree'} = $1;
1991                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
1992                         push @parents, $1;
1993                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
1994                         $co{'author'} = $1;
1995                         $co{'author_epoch'} = $2;
1996                         $co{'author_tz'} = $3;
1997                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
1998                                 $co{'author_name'}  = $1;
1999                                 $co{'author_email'} = $2;
2000                         } else {
2001                                 $co{'author_name'} = $co{'author'};
2002                         }
2003                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2004                         $co{'committer'} = $1;
2005                         $co{'committer_epoch'} = $2;
2006                         $co{'committer_tz'} = $3;
2007                         $co{'committer_name'} = $co{'committer'};
2008                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2009                                 $co{'committer_name'}  = $1;
2010                                 $co{'committer_email'} = $2;
2011                         } else {
2012                                 $co{'committer_name'} = $co{'committer'};
2013                         }
2014                 }
2015         }
2016         if (!defined $co{'tree'}) {
2017                 return;
2018         };
2019         $co{'parents'} = \@parents;
2020         $co{'parent'} = $parents[0];
2021
2022         foreach my $title (@commit_lines) {
2023                 $title =~ s/^    //;
2024                 if ($title ne "") {
2025                         $co{'title'} = chop_str($title, 80, 5);
2026                         # remove leading stuff of merges to make the interesting part visible
2027                         if (length($title) > 50) {
2028                                 $title =~ s/^Automatic //;
2029                                 $title =~ s/^merge (of|with) /Merge ... /i;
2030                                 if (length($title) > 50) {
2031                                         $title =~ s/(http|rsync):\/\///;
2032                                 }
2033                                 if (length($title) > 50) {
2034                                         $title =~ s/(master|www|rsync)\.//;
2035                                 }
2036                                 if (length($title) > 50) {
2037                                         $title =~ s/kernel.org:?//;
2038                                 }
2039                                 if (length($title) > 50) {
2040                                         $title =~ s/\/pub\/scm//;
2041                                 }
2042                         }
2043                         $co{'title_short'} = chop_str($title, 50, 5);
2044                         last;
2045                 }
2046         }
2047         if ($co{'title'} eq "") {
2048                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2049         }
2050         # remove added spaces
2051         foreach my $line (@commit_lines) {
2052                 $line =~ s/^    //;
2053         }
2054         $co{'comment'} = \@commit_lines;
2055
2056         my $age = time - $co{'committer_epoch'};
2057         $co{'age'} = $age;
2058         $co{'age_string'} = age_string($age);
2059         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2060         if ($age > 60*60*24*7*2) {
2061                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2062                 $co{'age_string_age'} = $co{'age_string'};
2063         } else {
2064                 $co{'age_string_date'} = $co{'age_string'};
2065                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2066         }
2067         return %co;
2068 }
2069
2070 sub parse_commit {
2071         my ($commit_id) = @_;
2072         my %co;
2073
2074         local $/ = "\0";
2075
2076         open my $fd, "-|", git_cmd(), "rev-list",
2077                 "--parents",
2078                 "--header",
2079                 "--max-count=1",
2080                 $commit_id,
2081                 "--",
2082                 or die_error(undef, "Open git-rev-list failed");
2083         %co = parse_commit_text(<$fd>, 1);
2084         close $fd;
2085
2086         return %co;
2087 }
2088
2089 sub parse_commits {
2090         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2091         my @cos;
2092
2093         $maxcount ||= 1;
2094         $skip ||= 0;
2095
2096         local $/ = "\0";
2097
2098         open my $fd, "-|", git_cmd(), "rev-list",
2099                 "--header",
2100                 @args,
2101                 ("--max-count=" . $maxcount),
2102                 ("--skip=" . $skip),
2103                 @extra_options,
2104                 $commit_id,
2105                 "--",
2106                 ($filename ? ($filename) : ())
2107                 or die_error(undef, "Open git-rev-list failed");
2108         while (my $line = <$fd>) {
2109                 my %co = parse_commit_text($line);
2110                 push @cos, \%co;
2111         }
2112         close $fd;
2113
2114         return wantarray ? @cos : \@cos;
2115 }
2116
2117 # parse ref from ref_file, given by ref_id, with given type
2118 sub parse_ref {
2119         my $ref_file = shift;
2120         my $ref_id = shift;
2121         my $type = shift || git_get_type($ref_id);
2122         my %ref_item;
2123
2124         $ref_item{'type'} = $type;
2125         $ref_item{'id'} = $ref_id;
2126         $ref_item{'epoch'} = 0;
2127         $ref_item{'age'} = "unknown";
2128         if ($type eq "tag") {
2129                 my %tag = parse_tag($ref_id);
2130                 $ref_item{'comment'} = $tag{'comment'};
2131                 if ($tag{'type'} eq "commit") {
2132                         my %co = parse_commit($tag{'object'});
2133                         $ref_item{'epoch'} = $co{'committer_epoch'};
2134                         $ref_item{'age'} = $co{'age_string'};
2135                 } elsif (defined($tag{'epoch'})) {
2136                         my $age = time - $tag{'epoch'};
2137                         $ref_item{'epoch'} = $tag{'epoch'};
2138                         $ref_item{'age'} = age_string($age);
2139                 }
2140                 $ref_item{'reftype'} = $tag{'type'};
2141                 $ref_item{'name'} = $tag{'name'};
2142                 $ref_item{'refid'} = $tag{'object'};
2143         } elsif ($type eq "commit"){
2144                 my %co = parse_commit($ref_id);
2145                 $ref_item{'reftype'} = "commit";
2146                 $ref_item{'name'} = $ref_file;
2147                 $ref_item{'title'} = $co{'title'};
2148                 $ref_item{'refid'} = $ref_id;
2149                 $ref_item{'epoch'} = $co{'committer_epoch'};
2150                 $ref_item{'age'} = $co{'age_string'};
2151         } else {
2152                 $ref_item{'reftype'} = $type;
2153                 $ref_item{'name'} = $ref_file;
2154                 $ref_item{'refid'} = $ref_id;
2155         }
2156
2157         return %ref_item;
2158 }
2159
2160 # parse line of git-diff-tree "raw" output
2161 sub parse_difftree_raw_line {
2162         my $line = shift;
2163         my %res;
2164
2165         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2166         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2167         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2168                 $res{'from_mode'} = $1;
2169                 $res{'to_mode'} = $2;
2170                 $res{'from_id'} = $3;
2171                 $res{'to_id'} = $4;
2172                 $res{'status'} = $5;
2173                 $res{'similarity'} = $6;
2174                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2175                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2176                 } else {
2177                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2178                 }
2179         }
2180         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2181         # combined diff (for merge commit)
2182         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2183                 $res{'nparents'}  = length($1);
2184                 $res{'from_mode'} = [ split(' ', $2) ];
2185                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2186                 $res{'from_id'} = [ split(' ', $3) ];
2187                 $res{'to_id'} = pop @{$res{'from_id'}};
2188                 $res{'status'} = [ split('', $4) ];
2189                 $res{'to_file'} = unquote($5);
2190         }
2191         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2192         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2193                 $res{'commit'} = $1;
2194         }
2195
2196         return wantarray ? %res : \%res;
2197 }
2198
2199 # wrapper: return parsed line of git-diff-tree "raw" output
2200 # (the argument might be raw line, or parsed info)
2201 sub parsed_difftree_line {
2202         my $line_or_ref = shift;
2203
2204         if (ref($line_or_ref) eq "HASH") {
2205                 # pre-parsed (or generated by hand)
2206                 return $line_or_ref;
2207         } else {
2208                 return parse_difftree_raw_line($line_or_ref);
2209         }
2210 }
2211
2212 # parse line of git-ls-tree output
2213 sub parse_ls_tree_line ($;%) {
2214         my $line = shift;
2215         my %opts = @_;
2216         my %res;
2217
2218         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2219         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2220
2221         $res{'mode'} = $1;
2222         $res{'type'} = $2;
2223         $res{'hash'} = $3;
2224         if ($opts{'-z'}) {
2225                 $res{'name'} = $4;
2226         } else {
2227                 $res{'name'} = unquote($4);
2228         }
2229
2230         return wantarray ? %res : \%res;
2231 }
2232
2233 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2234 sub parse_from_to_diffinfo {
2235         my ($diffinfo, $from, $to, @parents) = @_;
2236
2237         if ($diffinfo->{'nparents'}) {
2238                 # combined diff
2239                 $from->{'file'} = [];
2240                 $from->{'href'} = [];
2241                 fill_from_file_info($diffinfo, @parents)
2242                         unless exists $diffinfo->{'from_file'};
2243                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2244                         $from->{'file'}[$i] =
2245                                 defined $diffinfo->{'from_file'}[$i] ?
2246                                         $diffinfo->{'from_file'}[$i] :
2247                                         $diffinfo->{'to_file'};
2248                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2249                                 $from->{'href'}[$i] = href(action=>"blob",
2250                                                            hash_base=>$parents[$i],
2251                                                            hash=>$diffinfo->{'from_id'}[$i],
2252                                                            file_name=>$from->{'file'}[$i]);
2253                         } else {
2254                                 $from->{'href'}[$i] = undef;
2255                         }
2256                 }
2257         } else {
2258                 # ordinary (not combined) diff
2259                 $from->{'file'} = $diffinfo->{'from_file'};
2260                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2261                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2262                                                hash=>$diffinfo->{'from_id'},
2263                                                file_name=>$from->{'file'});
2264                 } else {
2265                         delete $from->{'href'};
2266                 }
2267         }
2268
2269         $to->{'file'} = $diffinfo->{'to_file'};
2270         if (!is_deleted($diffinfo)) { # file exists in result
2271                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2272                                      hash=>$diffinfo->{'to_id'},
2273                                      file_name=>$to->{'file'});
2274         } else {
2275                 delete $to->{'href'};
2276         }
2277 }
2278
2279 ## ......................................................................
2280 ## parse to array of hashes functions
2281
2282 sub git_get_heads_list {
2283         my $limit = shift;
2284         my @headslist;
2285
2286         open my $fd, '-|', git_cmd(), 'for-each-ref',
2287                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2288                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2289                 'refs/heads'
2290                 or return;
2291         while (my $line = <$fd>) {
2292                 my %ref_item;
2293
2294                 chomp $line;
2295                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2296                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2297                 my ($committer, $epoch, $tz) =
2298                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2299                 $ref_item{'fullname'}  = $name;
2300                 $name =~ s!^refs/heads/!!;
2301
2302                 $ref_item{'name'}  = $name;
2303                 $ref_item{'id'}    = $hash;
2304                 $ref_item{'title'} = $title || '(no commit message)';
2305                 $ref_item{'epoch'} = $epoch;
2306                 if ($epoch) {
2307                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2308                 } else {
2309                         $ref_item{'age'} = "unknown";
2310                 }
2311
2312                 push @headslist, \%ref_item;
2313         }
2314         close $fd;
2315
2316         return wantarray ? @headslist : \@headslist;
2317 }
2318
2319 sub git_get_tags_list {
2320         my $limit = shift;
2321         my @tagslist;
2322
2323         open my $fd, '-|', git_cmd(), 'for-each-ref',
2324                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2325                 '--format=%(objectname) %(objecttype) %(refname) '.
2326                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2327                 'refs/tags'
2328                 or return;
2329         while (my $line = <$fd>) {
2330                 my %ref_item;
2331
2332                 chomp $line;
2333                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2334                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2335                 my ($creator, $epoch, $tz) =
2336                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2337                 $ref_item{'fullname'} = $name;
2338                 $name =~ s!^refs/tags/!!;
2339
2340                 $ref_item{'type'} = $type;
2341                 $ref_item{'id'} = $id;
2342                 $ref_item{'name'} = $name;
2343                 if ($type eq "tag") {
2344                         $ref_item{'subject'} = $title;
2345                         $ref_item{'reftype'} = $reftype;
2346                         $ref_item{'refid'}   = $refid;
2347                 } else {
2348                         $ref_item{'reftype'} = $type;
2349                         $ref_item{'refid'}   = $id;
2350                 }
2351
2352                 if ($type eq "tag" || $type eq "commit") {
2353                         $ref_item{'epoch'} = $epoch;
2354                         if ($epoch) {
2355                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2356                         } else {
2357                                 $ref_item{'age'} = "unknown";
2358                         }
2359                 }
2360
2361                 push @tagslist, \%ref_item;
2362         }
2363         close $fd;
2364
2365         return wantarray ? @tagslist : \@tagslist;
2366 }
2367
2368 ## ----------------------------------------------------------------------
2369 ## filesystem-related functions
2370
2371 sub get_file_owner {
2372         my $path = shift;
2373
2374         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2375         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2376         if (!defined $gcos) {
2377                 return undef;
2378         }
2379         my $owner = $gcos;
2380         $owner =~ s/[,;].*$//;
2381         return to_utf8($owner);
2382 }
2383
2384 ## ......................................................................
2385 ## mimetype related functions
2386
2387 sub mimetype_guess_file {
2388         my $filename = shift;
2389         my $mimemap = shift;
2390         -r $mimemap or return undef;
2391
2392         my %mimemap;
2393         open(MIME, $mimemap) or return undef;
2394         while (<MIME>) {
2395                 next if m/^#/; # skip comments
2396                 my ($mime, $exts) = split(/\t+/);
2397                 if (defined $exts) {
2398                         my @exts = split(/\s+/, $exts);
2399                         foreach my $ext (@exts) {
2400                                 $mimemap{$ext} = $mime;
2401                         }
2402                 }
2403         }
2404         close(MIME);
2405
2406         $filename =~ /\.([^.]*)$/;
2407         return $mimemap{$1};
2408 }
2409
2410 sub mimetype_guess {
2411         my $filename = shift;
2412         my $mime;
2413         $filename =~ /\./ or return undef;
2414
2415         if ($mimetypes_file) {
2416                 my $file = $mimetypes_file;
2417                 if ($file !~ m!^/!) { # if it is relative path
2418                         # it is relative to project
2419                         $file = "$projectroot/$project/$file";
2420                 }
2421                 $mime = mimetype_guess_file($filename, $file);
2422         }
2423         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2424         return $mime;
2425 }
2426
2427 sub blob_mimetype {
2428         my $fd = shift;
2429         my $filename = shift;
2430
2431         if ($filename) {
2432                 my $mime = mimetype_guess($filename);
2433                 $mime and return $mime;
2434         }
2435
2436         # just in case
2437         return $default_blob_plain_mimetype unless $fd;
2438
2439         if (-T $fd) {
2440                 return 'text/plain' .
2441                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2442         } elsif (! $filename) {
2443                 return 'application/octet-stream';
2444         } elsif ($filename =~ m/\.png$/i) {
2445                 return 'image/png';
2446         } elsif ($filename =~ m/\.gif$/i) {
2447                 return 'image/gif';
2448         } elsif ($filename =~ m/\.jpe?g$/i) {
2449                 return 'image/jpeg';
2450         } else {
2451                 return 'application/octet-stream';
2452         }
2453 }
2454
2455 ## ======================================================================
2456 ## functions printing HTML: header, footer, error page
2457
2458 sub git_header_html {
2459         my $status = shift || "200 OK";
2460         my $expires = shift;
2461
2462         my $title = "$site_name";
2463         if (defined $project) {
2464                 $title .= " - " . to_utf8($project);
2465                 if (defined $action) {
2466                         $title .= "/$action";
2467                         if (defined $file_name) {
2468                                 $title .= " - " . esc_path($file_name);
2469                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2470                                         $title .= "/";
2471                                 }
2472                         }
2473                 }
2474         }
2475         my $content_type;
2476         # require explicit support from the UA if we are to send the page as
2477         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2478         # we have to do this because MSIE sometimes globs '*/*', pretending to
2479         # support xhtml+xml but choking when it gets what it asked for.
2480         if (defined $cgi->http('HTTP_ACCEPT') &&
2481             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2482             $cgi->Accept('application/xhtml+xml') != 0) {
2483                 $content_type = 'application/xhtml+xml';
2484         } else {
2485                 $content_type = 'text/html';
2486         }
2487         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2488                            -status=> $status, -expires => $expires);
2489         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2490         print <<EOF;
2491 <?xml version="1.0" encoding="utf-8"?>
2492 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2493 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2494 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2495 <!-- git core binaries version $git_version -->
2496 <head>
2497 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2498 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2499 <meta name="robots" content="index, nofollow"/>
2500 <title>$title</title>
2501 EOF
2502 # print out each stylesheet that exist
2503         if (defined $stylesheet) {
2504 #provides backwards capability for those people who define style sheet in a config file
2505                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2506         } else {
2507                 foreach my $stylesheet (@stylesheets) {
2508                         next unless $stylesheet;
2509                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2510                 }
2511         }
2512         if (defined $project) {
2513                 printf('<link rel="alternate" title="%s log RSS feed" '.
2514                        'href="%s" type="application/rss+xml" />'."\n",
2515                        esc_param($project), href(action=>"rss"));
2516                 printf('<link rel="alternate" title="%s log RSS feed (no merges)" '.
2517                        'href="%s" type="application/rss+xml" />'."\n",
2518                        esc_param($project), href(action=>"rss",
2519                                                  extra_options=>"--no-merges"));
2520                 printf('<link rel="alternate" title="%s log Atom feed" '.
2521                        'href="%s" type="application/atom+xml" />'."\n",
2522                        esc_param($project), href(action=>"atom"));
2523                 printf('<link rel="alternate" title="%s log Atom feed (no merges)" '.
2524                        'href="%s" type="application/atom+xml" />'."\n",
2525                        esc_param($project), href(action=>"atom",
2526                                                  extra_options=>"--no-merges"));
2527         } else {
2528                 printf('<link rel="alternate" title="%s projects list" '.
2529                        'href="%s" type="text/plain; charset=utf-8"/>'."\n",
2530                        $site_name, href(project=>undef, action=>"project_index"));
2531                 printf('<link rel="alternate" title="%s projects feeds" '.
2532                        'href="%s" type="text/x-opml"/>'."\n",
2533                        $site_name, href(project=>undef, action=>"opml"));
2534         }
2535         if (defined $favicon) {
2536                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
2537         }
2538
2539         print "</head>\n" .
2540               "<body>\n";
2541
2542         if (-f $site_header) {
2543                 open (my $fd, $site_header);
2544                 print <$fd>;
2545                 close $fd;
2546         }
2547
2548         print "<div class=\"page_header\">\n" .
2549               $cgi->a({-href => esc_url($logo_url),
2550                        -title => $logo_label},
2551                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2552         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2553         if (defined $project) {
2554                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2555                 if (defined $action) {
2556                         print " / $action";
2557                 }
2558                 print "\n";
2559         }
2560         print "</div>\n";
2561
2562         my ($have_search) = gitweb_check_feature('search');
2563         if ((defined $project) && ($have_search)) {
2564                 if (!defined $searchtext) {
2565                         $searchtext = "";
2566                 }
2567                 my $search_hash;
2568                 if (defined $hash_base) {
2569                         $search_hash = $hash_base;
2570                 } elsif (defined $hash) {
2571                         $search_hash = $hash;
2572                 } else {
2573                         $search_hash = "HEAD";
2574                 }
2575                 my $action = $my_uri;
2576                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2577                 if ($use_pathinfo) {
2578                         $action .= "/$project";
2579                 } else {
2580                         $cgi->param("p", $project);
2581                 }
2582                 $cgi->param("a", "search");
2583                 $cgi->param("h", $search_hash);
2584                 print $cgi->startform(-method => "get", -action => $action) .
2585                       "<div class=\"search\">\n" .
2586                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2587                       $cgi->hidden(-name => "a") . "\n" .
2588                       $cgi->hidden(-name => "h") . "\n" .
2589                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2590                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2591                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2592                       " search:\n",
2593                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2594                       "<span title=\"Extended regular expression\">" .
2595                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2596                                      -checked => $search_use_regexp) .
2597                       "</span>" .
2598                       "</div>" .
2599                       $cgi->end_form() . "\n";
2600         }
2601 }
2602
2603 sub git_footer_html {
2604         print "<div class=\"page_footer\">\n";
2605         if (defined $project) {
2606                 my $descr = git_get_project_description($project);
2607                 if (defined $descr) {
2608                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2609                 }
2610                 print $cgi->a({-href => href(action=>"rss"),
2611                               -class => "rss_logo"}, "RSS") . " ";
2612                 print $cgi->a({-href => href(action=>"atom"),
2613                               -class => "rss_logo"}, "Atom") . "\n";
2614         } else {
2615                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2616                               -class => "rss_logo"}, "OPML") . " ";
2617                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2618                               -class => "rss_logo"}, "TXT") . "\n";
2619         }
2620         print "</div>\n" ;
2621
2622         if (-f $site_footer) {
2623                 open (my $fd, $site_footer);
2624                 print <$fd>;
2625                 close $fd;
2626         }
2627
2628         print "</body>\n" .
2629               "</html>";
2630 }
2631
2632 sub die_error {
2633         my $status = shift || "403 Forbidden";
2634         my $error = shift || "Malformed query, file missing or permission denied";
2635
2636         git_header_html($status);
2637         print <<EOF;
2638 <div class="page_body">
2639 <br /><br />
2640 $status - $error
2641 <br />
2642 </div>
2643 EOF
2644         git_footer_html();
2645         exit;
2646 }
2647
2648 ## ----------------------------------------------------------------------
2649 ## functions printing or outputting HTML: navigation
2650
2651 sub git_print_page_nav {
2652         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2653         $extra = '' if !defined $extra; # pager or formats
2654
2655         my @navs = qw(summary shortlog log commit commitdiff tree);
2656         if ($suppress) {
2657                 @navs = grep { $_ ne $suppress } @navs;
2658         }
2659
2660         my %arg = map { $_ => {action=>$_} } @navs;
2661         if (defined $head) {
2662                 for (qw(commit commitdiff)) {
2663                         $arg{$_}{'hash'} = $head;
2664                 }
2665                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2666                         for (qw(shortlog log)) {
2667                                 $arg{$_}{'hash'} = $head;
2668                         }
2669                 }
2670         }
2671         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2672         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2673
2674         print "<div class=\"page_nav\">\n" .
2675                 (join " | ",
2676                  map { $_ eq $current ?
2677                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2678                  } @navs);
2679         print "<br/>\n$extra<br/>\n" .
2680               "</div>\n";
2681 }
2682
2683 sub format_paging_nav {
2684         my ($action, $hash, $head, $page, $nrevs) = @_;
2685         my $paging_nav;
2686
2687
2688         if ($hash ne $head || $page) {
2689                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2690         } else {
2691                 $paging_nav .= "HEAD";
2692         }
2693
2694         if ($page > 0) {
2695                 $paging_nav .= " &sdot; " .
2696                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2697                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2698         } else {
2699                 $paging_nav .= " &sdot; prev";
2700         }
2701
2702         if ($nrevs >= (100 * ($page+1)-1)) {
2703                 $paging_nav .= " &sdot; " .
2704                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2705                                  -accesskey => "n", -title => "Alt-n"}, "next");
2706         } else {
2707                 $paging_nav .= " &sdot; next";
2708         }
2709
2710         return $paging_nav;
2711 }
2712
2713 ## ......................................................................
2714 ## functions printing or outputting HTML: div
2715
2716 sub git_print_header_div {
2717         my ($action, $title, $hash, $hash_base) = @_;
2718         my %args = ();
2719
2720         $args{'action'} = $action;
2721         $args{'hash'} = $hash if $hash;
2722         $args{'hash_base'} = $hash_base if $hash_base;
2723
2724         print "<div class=\"header\">\n" .
2725               $cgi->a({-href => href(%args), -class => "title"},
2726               $title ? $title : $action) .
2727               "\n</div>\n";
2728 }
2729
2730 #sub git_print_authorship (\%) {
2731 sub git_print_authorship {
2732         my $co = shift;
2733
2734         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2735         print "<div class=\"author_date\">" .
2736               esc_html($co->{'author_name'}) .
2737               " [$ad{'rfc2822'}";
2738         if ($ad{'hour_local'} < 6) {
2739                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2740                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2741         } else {
2742                 printf(" (%02d:%02d %s)",
2743                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2744         }
2745         print "]</div>\n";
2746 }
2747
2748 sub git_print_page_path {
2749         my $name = shift;
2750         my $type = shift;
2751         my $hb = shift;
2752
2753
2754         print "<div class=\"page_path\">";
2755         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2756                       -title => 'tree root'}, to_utf8("[$project]"));
2757         print " / ";
2758         if (defined $name) {
2759                 my @dirname = split '/', $name;
2760                 my $basename = pop @dirname;
2761                 my $fullname = '';
2762
2763                 foreach my $dir (@dirname) {
2764                         $fullname .= ($fullname ? '/' : '') . $dir;
2765                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2766                                                      hash_base=>$hb),
2767                                       -title => $fullname}, esc_path($dir));
2768                         print " / ";
2769                 }
2770                 if (defined $type && $type eq 'blob') {
2771                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2772                                                      hash_base=>$hb),
2773                                       -title => $name}, esc_path($basename));
2774                 } elsif (defined $type && $type eq 'tree') {
2775                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2776                                                      hash_base=>$hb),
2777                                       -title => $name}, esc_path($basename));
2778                         print " / ";
2779                 } else {
2780                         print esc_path($basename);
2781                 }
2782         }
2783         print "<br/></div>\n";
2784 }
2785
2786 # sub git_print_log (\@;%) {
2787 sub git_print_log ($;%) {
2788         my $log = shift;
2789         my %opts = @_;
2790
2791         if ($opts{'-remove_title'}) {
2792                 # remove title, i.e. first line of log
2793                 shift @$log;
2794         }
2795         # remove leading empty lines
2796         while (defined $log->[0] && $log->[0] eq "") {
2797                 shift @$log;
2798         }
2799
2800         # print log
2801         my $signoff = 0;
2802         my $empty = 0;
2803         foreach my $line (@$log) {
2804                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2805                         $signoff = 1;
2806                         $empty = 0;
2807                         if (! $opts{'-remove_signoff'}) {
2808                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2809                                 next;
2810                         } else {
2811                                 # remove signoff lines
2812                                 next;
2813                         }
2814                 } else {
2815                         $signoff = 0;
2816                 }
2817
2818                 # print only one empty line
2819                 # do not print empty line after signoff
2820                 if ($line eq "") {
2821                         next if ($empty || $signoff);
2822                         $empty = 1;
2823                 } else {
2824                         $empty = 0;
2825                 }
2826
2827                 print format_log_line_html($line) . "<br/>\n";
2828         }
2829
2830         if ($opts{'-final_empty_line'}) {
2831                 # end with single empty line
2832                 print "<br/>\n" unless $empty;
2833         }
2834 }
2835
2836 # return link target (what link points to)
2837 sub git_get_link_target {
2838         my $hash = shift;
2839         my $link_target;
2840
2841         # read link
2842         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2843                 or return;
2844         {
2845                 local $/;
2846                 $link_target = <$fd>;
2847         }
2848         close $fd
2849                 or return;
2850
2851         return $link_target;
2852 }
2853
2854 # given link target, and the directory (basedir) the link is in,
2855 # return target of link relative to top directory (top tree);
2856 # return undef if it is not possible (including absolute links).
2857 sub normalize_link_target {
2858         my ($link_target, $basedir, $hash_base) = @_;
2859
2860         # we can normalize symlink target only if $hash_base is provided
2861         return unless $hash_base;
2862
2863         # absolute symlinks (beginning with '/') cannot be normalized
2864         return if (substr($link_target, 0, 1) eq '/');
2865
2866         # normalize link target to path from top (root) tree (dir)
2867         my $path;
2868         if ($basedir) {
2869                 $path = $basedir . '/' . $link_target;
2870         } else {
2871                 # we are in top (root) tree (dir)
2872                 $path = $link_target;
2873         }
2874
2875         # remove //, /./, and /../
2876         my @path_parts;
2877         foreach my $part (split('/', $path)) {
2878                 # discard '.' and ''
2879                 next if (!$part || $part eq '.');
2880                 # handle '..'
2881                 if ($part eq '..') {
2882                         if (@path_parts) {
2883                                 pop @path_parts;
2884                         } else {
2885                                 # link leads outside repository (outside top dir)
2886                                 return;
2887                         }
2888                 } else {
2889                         push @path_parts, $part;
2890                 }
2891         }
2892         $path = join('/', @path_parts);
2893
2894         return $path;
2895 }
2896
2897 # print tree entry (row of git_tree), but without encompassing <tr> element
2898 sub git_print_tree_entry {
2899         my ($t, $basedir, $hash_base, $have_blame) = @_;
2900
2901         my %base_key = ();
2902         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2903
2904         # The format of a table row is: mode list link.  Where mode is
2905         # the mode of the entry, list is the name of the entry, an href,
2906         # and link is the action links of the entry.
2907
2908         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2909         if ($t->{'type'} eq "blob") {
2910                 print "<td class=\"list\">" .
2911                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2912                                                file_name=>"$basedir$t->{'name'}", %base_key),
2913                                 -class => "list"}, esc_path($t->{'name'}));
2914                 if (S_ISLNK(oct $t->{'mode'})) {
2915                         my $link_target = git_get_link_target($t->{'hash'});
2916                         if ($link_target) {
2917                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2918                                 if (defined $norm_target) {
2919                                         print " -> " .
2920                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2921                                                                      file_name=>$norm_target),
2922                                                        -title => $norm_target}, esc_path($link_target));
2923                                 } else {
2924                                         print " -> " . esc_path($link_target);
2925                                 }
2926                         }
2927                 }
2928                 print "</td>\n";
2929                 print "<td class=\"link\">";
2930                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2931                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2932                               "blob");
2933                 if ($have_blame) {
2934                         print " | " .
2935                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2936                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2937                                       "blame");
2938                 }
2939                 if (defined $hash_base) {
2940                         print " | " .
2941                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2942                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2943                                       "history");
2944                 }
2945                 print " | " .
2946                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2947                                                file_name=>"$basedir$t->{'name'}")},
2948                                 "raw");
2949                 print "</td>\n";
2950
2951         } elsif ($t->{'type'} eq "tree") {
2952                 print "<td class=\"list\">";
2953                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2954                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2955                               esc_path($t->{'name'}));
2956                 print "</td>\n";
2957                 print "<td class=\"link\">";
2958                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2959                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2960                               "tree");
2961                 if (defined $hash_base) {
2962                         print " | " .
2963                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2964                                                      file_name=>"$basedir$t->{'name'}")},
2965                                       "history");
2966                 }
2967                 print "</td>\n";
2968         } else {
2969                 # unknown object: we can only present history for it
2970                 # (this includes 'commit' object, i.e. submodule support)
2971                 print "<td class=\"list\">" .
2972                       esc_path($t->{'name'}) .
2973                       "</td>\n";
2974                 print "<td class=\"link\">";
2975                 if (defined $hash_base) {
2976                         print $cgi->a({-href => href(action=>"history",
2977                                                      hash_base=>$hash_base,
2978                                                      file_name=>"$basedir$t->{'name'}")},
2979                                       "history");
2980                 }
2981                 print "</td>\n";
2982         }
2983 }
2984
2985 ## ......................................................................
2986 ## functions printing large fragments of HTML
2987
2988 # get pre-image filenames for merge (combined) diff
2989 sub fill_from_file_info {
2990         my ($diff, @parents) = @_;
2991
2992         $diff->{'from_file'} = [ ];
2993         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
2994         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
2995                 if ($diff->{'status'}[$i] eq 'R' ||
2996                     $diff->{'status'}[$i] eq 'C') {
2997                         $diff->{'from_file'}[$i] =
2998                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
2999                 }
3000         }
3001
3002         return $diff;
3003 }
3004
3005 # is current raw difftree line of file deletion
3006 sub is_deleted {
3007         my $diffinfo = shift;
3008
3009         return $diffinfo->{'to_id'} eq ('0' x 40);
3010 }
3011
3012 # does patch correspond to [previous] difftree raw line
3013 # $diffinfo  - hashref of parsed raw diff format
3014 # $patchinfo - hashref of parsed patch diff format
3015 #              (the same keys as in $diffinfo)
3016 sub is_patch_split {
3017         my ($diffinfo, $patchinfo) = @_;
3018
3019         return defined $diffinfo && defined $patchinfo
3020                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3021 }
3022
3023
3024 sub git_difftree_body {
3025         my ($difftree, $hash, @parents) = @_;
3026         my ($parent) = $parents[0];
3027         my ($have_blame) = gitweb_check_feature('blame');
3028         print "<div class=\"list_head\">\n";
3029         if ($#{$difftree} > 10) {
3030                 print(($#{$difftree} + 1) . " files changed:\n");
3031         }
3032         print "</div>\n";
3033
3034         print "<table class=\"" .
3035               (@parents > 1 ? "combined " : "") .
3036               "diff_tree\">\n";
3037
3038         # header only for combined diff in 'commitdiff' view
3039         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3040         if ($has_header) {
3041                 # table header
3042                 print "<thead><tr>\n" .
3043                        "<th></th><th></th>\n"; # filename, patchN link
3044                 for (my $i = 0; $i < @parents; $i++) {
3045                         my $par = $parents[$i];
3046                         print "<th>" .
3047                               $cgi->a({-href => href(action=>"commitdiff",
3048                                                      hash=>$hash, hash_parent=>$par),
3049                                        -title => 'commitdiff to parent number ' .
3050                                                   ($i+1) . ': ' . substr($par,0,7)},
3051                                       $i+1) .
3052                               "&nbsp;</th>\n";
3053                 }
3054                 print "</tr></thead>\n<tbody>\n";
3055         }
3056
3057         my $alternate = 1;
3058         my $patchno = 0;
3059         foreach my $line (@{$difftree}) {
3060                 my $diff = parsed_difftree_line($line);
3061
3062                 if ($alternate) {
3063                         print "<tr class=\"dark\">\n";
3064                 } else {
3065                         print "<tr class=\"light\">\n";
3066                 }
3067                 $alternate ^= 1;
3068
3069                 if (exists $diff->{'nparents'}) { # combined diff
3070
3071                         fill_from_file_info($diff, @parents)
3072                                 unless exists $diff->{'from_file'};
3073
3074                         if (!is_deleted($diff)) {
3075                                 # file exists in the result (child) commit
3076                                 print "<td>" .
3077                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3078                                                              file_name=>$diff->{'to_file'},
3079                                                              hash_base=>$hash),
3080                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3081                                       "</td>\n";
3082                         } else {
3083                                 print "<td>" .
3084                                       esc_path($diff->{'to_file'}) .
3085                                       "</td>\n";
3086                         }
3087
3088                         if ($action eq 'commitdiff') {
3089                                 # link to patch
3090                                 $patchno++;
3091                                 print "<td class=\"link\">" .
3092                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3093                                       " | " .
3094                                       "</td>\n";
3095                         }
3096
3097                         my $has_history = 0;
3098                         my $not_deleted = 0;
3099                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3100                                 my $hash_parent = $parents[$i];
3101                                 my $from_hash = $diff->{'from_id'}[$i];
3102                                 my $from_path = $diff->{'from_file'}[$i];
3103                                 my $status = $diff->{'status'}[$i];
3104
3105                                 $has_history ||= ($status ne 'A');
3106                                 $not_deleted ||= ($status ne 'D');
3107
3108                                 if ($status eq 'A') {
3109                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3110                                 } elsif ($status eq 'D') {
3111                                         print "<td class=\"link\">" .
3112                                               $cgi->a({-href => href(action=>"blob",
3113                                                                      hash_base=>$hash,
3114                                                                      hash=>$from_hash,
3115                                                                      file_name=>$from_path)},
3116                                                       "blob" . ($i+1)) .
3117                                               " | </td>\n";
3118                                 } else {
3119                                         if ($diff->{'to_id'} eq $from_hash) {
3120                                                 print "<td class=\"link nochange\">";
3121                                         } else {
3122                                                 print "<td class=\"link\">";
3123                                         }
3124                                         print $cgi->a({-href => href(action=>"blobdiff",
3125                                                                      hash=>$diff->{'to_id'},
3126                                                                      hash_parent=>$from_hash,
3127                                                                      hash_base=>$hash,
3128                                                                      hash_parent_base=>$hash_parent,
3129                                                                      file_name=>$diff->{'to_file'},
3130                                                                      file_parent=>$from_path)},
3131                                                       "diff" . ($i+1)) .
3132                                               " | </td>\n";
3133                                 }
3134                         }
3135
3136                         print "<td class=\"link\">";
3137                         if ($not_deleted) {
3138                                 print $cgi->a({-href => href(action=>"blob",
3139                                                              hash=>$diff->{'to_id'},
3140                                                              file_name=>$diff->{'to_file'},
3141                                                              hash_base=>$hash)},
3142                                               "blob");
3143                                 print " | " if ($has_history);
3144                         }
3145                         if ($has_history) {
3146                                 print $cgi->a({-href => href(action=>"history",
3147                                                              file_name=>$diff->{'to_file'},
3148                                                              hash_base=>$hash)},
3149                                               "history");
3150                         }
3151                         print "</td>\n";
3152
3153                         print "</tr>\n";
3154                         next; # instead of 'else' clause, to avoid extra indent
3155                 }
3156                 # else ordinary diff
3157
3158                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3159                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3160                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3161                         $to_mode_oct = oct $diff->{'to_mode'};
3162                         if (S_ISREG($to_mode_oct)) { # only for regular file
3163                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3164                         }
3165                         $to_file_type = file_type($diff->{'to_mode'});
3166                 }
3167                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3168                         $from_mode_oct = oct $diff->{'from_mode'};
3169                         if (S_ISREG($to_mode_oct)) { # only for regular file
3170                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3171                         }
3172                         $from_file_type = file_type($diff->{'from_mode'});
3173                 }
3174
3175                 if ($diff->{'status'} eq "A") { # created
3176                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3177                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3178                         $mode_chng   .= "]</span>";
3179                         print "<td>";
3180                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3181                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3182                                       -class => "list"}, esc_path($diff->{'file'}));
3183                         print "</td>\n";
3184                         print "<td>$mode_chng</td>\n";
3185                         print "<td class=\"link\">";
3186                         if ($action eq 'commitdiff') {
3187                                 # link to patch
3188                                 $patchno++;
3189                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3190                                 print " | ";
3191                         }
3192                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3193                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3194                                       "blob");
3195                         print "</td>\n";
3196
3197                 } elsif ($diff->{'status'} eq "D") { # deleted
3198                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3199                         print "<td>";
3200                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3201                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3202                                        -class => "list"}, esc_path($diff->{'file'}));
3203                         print "</td>\n";
3204                         print "<td>$mode_chng</td>\n";
3205                         print "<td class=\"link\">";
3206                         if ($action eq 'commitdiff') {
3207                                 # link to patch
3208                                 $patchno++;
3209                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3210                                 print " | ";
3211                         }
3212                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3213                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3214                                       "blob") . " | ";
3215                         if ($have_blame) {
3216                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3217                                                              file_name=>$diff->{'file'})},
3218                                               "blame") . " | ";
3219                         }
3220                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3221                                                      file_name=>$diff->{'file'})},
3222                                       "history");
3223                         print "</td>\n";
3224
3225                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3226                         my $mode_chnge = "";
3227                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3228                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3229                                 if ($from_file_type ne $to_file_type) {
3230                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3231                                 }
3232                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3233                                         if ($from_mode_str && $to_mode_str) {
3234                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3235                                         } elsif ($to_mode_str) {
3236                                                 $mode_chnge .= " mode: $to_mode_str";
3237                                         }
3238                                 }
3239                                 $mode_chnge .= "]</span>\n";
3240                         }
3241                         print "<td>";
3242                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3243                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3244                                       -class => "list"}, esc_path($diff->{'file'}));
3245                         print "</td>\n";
3246                         print "<td>$mode_chnge</td>\n";
3247                         print "<td class=\"link\">";
3248                         if ($action eq 'commitdiff') {
3249                                 # link to patch
3250                                 $patchno++;
3251                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3252                                       " | ";
3253                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3254                                 # "commit" view and modified file (not onlu mode changed)
3255                                 print $cgi->a({-href => href(action=>"blobdiff",
3256                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3257                                                              hash_base=>$hash, hash_parent_base=>$parent,
3258                                                              file_name=>$diff->{'file'})},
3259                                               "diff") .
3260                                       " | ";
3261                         }
3262                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3263                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3264                                        "blob") . " | ";
3265                         if ($have_blame) {
3266                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3267                                                              file_name=>$diff->{'file'})},
3268                                               "blame") . " | ";
3269                         }
3270                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3271                                                      file_name=>$diff->{'file'})},
3272                                       "history");
3273                         print "</td>\n";
3274
3275                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3276                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3277                         my $nstatus = $status_name{$diff->{'status'}};
3278                         my $mode_chng = "";
3279                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3280                                 # mode also for directories, so we cannot use $to_mode_str
3281                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3282                         }
3283                         print "<td>" .
3284                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3285                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3286                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3287                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3288                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3289                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3290                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3291                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3292                               "<td class=\"link\">";
3293                         if ($action eq 'commitdiff') {
3294                                 # link to patch
3295                                 $patchno++;
3296                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3297                                       " | ";
3298                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3299                                 # "commit" view and modified file (not only pure rename or copy)
3300                                 print $cgi->a({-href => href(action=>"blobdiff",
3301                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3302                                                              hash_base=>$hash, hash_parent_base=>$parent,
3303                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3304                                               "diff") .
3305                                       " | ";
3306                         }
3307                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3308                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3309                                       "blob") . " | ";
3310                         if ($have_blame) {
3311                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3312                                                              file_name=>$diff->{'to_file'})},
3313                                               "blame") . " | ";
3314                         }
3315                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3316                                                     file_name=>$diff->{'to_file'})},
3317                                       "history");
3318                         print "</td>\n";
3319
3320                 } # we should not encounter Unmerged (U) or Unknown (X) status
3321                 print "</tr>\n";
3322         }
3323         print "</tbody>" if $has_header;
3324         print "</table>\n";
3325 }
3326
3327 sub git_patchset_body {
3328         my ($fd, $difftree, $hash, @hash_parents) = @_;
3329         my ($hash_parent) = $hash_parents[0];
3330
3331         my $is_combined = (@hash_parents > 1);
3332         my $patch_idx = 0;
3333         my $patch_number = 0;
3334         my $patch_line;
3335         my $diffinfo;
3336         my $to_name;
3337         my (%from, %to);
3338
3339         print "<div class=\"patchset\">\n";
3340
3341         # skip to first patch
3342         while ($patch_line = <$fd>) {
3343                 chomp $patch_line;
3344
3345                 last if ($patch_line =~ m/^diff /);
3346         }
3347
3348  PATCH:
3349         while ($patch_line) {
3350
3351                 # parse "git diff" header line
3352                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3353                         # $1 is from_name, which we do not use
3354                         $to_name = unquote($2);
3355                         $to_name =~ s!^b/!!;
3356                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3357                         # $1 is 'cc' or 'combined', which we do not use
3358                         $to_name = unquote($2);
3359                 } else {
3360                         $to_name = undef;
3361                 }
3362
3363                 # check if current patch belong to current raw line
3364                 # and parse raw git-diff line if needed
3365                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3366                         # this is continuation of a split patch
3367                         print "<div class=\"patch cont\">\n";
3368                 } else {
3369                         # advance raw git-diff output if needed
3370                         $patch_idx++ if defined $diffinfo;
3371
3372                         # read and prepare patch information
3373                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3374
3375                         # compact combined diff output can have some patches skipped
3376                         # find which patch (using pathname of result) we are at now;
3377                         if ($is_combined) {
3378                                 while ($to_name ne $diffinfo->{'to_file'}) {
3379                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3380                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3381                                               "</div>\n";  # class="patch"
3382
3383                                         $patch_idx++;
3384                                         $patch_number++;
3385
3386                                         last if $patch_idx > $#$difftree;
3387                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3388                                 }
3389                         }
3390
3391                         # modifies %from, %to hashes
3392                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3393
3394                         # this is first patch for raw difftree line with $patch_idx index
3395                         # we index @$difftree array from 0, but number patches from 1
3396                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3397                 }
3398
3399                 # git diff header
3400                 #assert($patch_line =~ m/^diff /) if DEBUG;
3401                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3402                 $patch_number++;
3403                 # print "git diff" header
3404                 print format_git_diff_header_line($patch_line, $diffinfo,
3405                                                   \%from, \%to);
3406
3407                 # print extended diff header
3408                 print "<div class=\"diff extended_header\">\n";
3409         EXTENDED_HEADER:
3410                 while ($patch_line = <$fd>) {
3411                         chomp $patch_line;
3412
3413                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3414
3415                         print format_extended_diff_header_line($patch_line, $diffinfo,
3416                                                                \%from, \%to);
3417                 }
3418                 print "</div>\n"; # class="diff extended_header"
3419
3420                 # from-file/to-file diff header
3421                 if (! $patch_line) {
3422                         print "</div>\n"; # class="patch"
3423                         last PATCH;
3424                 }
3425                 next PATCH if ($patch_line =~ m/^diff /);
3426                 #assert($patch_line =~ m/^---/) if DEBUG;
3427
3428                 my $last_patch_line = $patch_line;
3429                 $patch_line = <$fd>;
3430                 chomp $patch_line;
3431                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3432
3433                 print format_diff_from_to_header($last_patch_line, $patch_line,
3434                                                  $diffinfo, \%from, \%to,
3435                                                  @hash_parents);
3436
3437                 # the patch itself
3438         LINE:
3439                 while ($patch_line = <$fd>) {
3440                         chomp $patch_line;
3441
3442                         next PATCH if ($patch_line =~ m/^diff /);
3443
3444                         print format_diff_line($patch_line, \%from, \%to);
3445                 }
3446
3447         } continue {
3448                 print "</div>\n"; # class="patch"
3449         }
3450
3451         # for compact combined (--cc) format, with chunk and patch simpliciaction
3452         # patchset might be empty, but there might be unprocessed raw lines
3453         for (++$patch_idx if $patch_number > 0;
3454              $patch_idx < @$difftree;
3455              ++$patch_idx) {
3456                 # read and prepare patch information
3457                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3458
3459                 # generate anchor for "patch" links in difftree / whatchanged part
3460                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3461                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3462                       "</div>\n";  # class="patch"
3463
3464                 $patch_number++;
3465         }
3466
3467         if ($patch_number == 0) {
3468                 if (@hash_parents > 1) {
3469                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3470                 } else {
3471                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3472                 }
3473         }
3474
3475         print "</div>\n"; # class="patchset"
3476 }
3477
3478 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3479
3480 sub git_project_list_body {
3481         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3482
3483         my ($check_forks) = gitweb_check_feature('forks');
3484
3485         my @projects;
3486         foreach my $pr (@$projlist) {
3487                 my (@aa) = git_get_last_activity($pr->{'path'});
3488                 unless (@aa) {
3489                         next;
3490                 }
3491                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3492                 if (!defined $pr->{'descr'}) {
3493                         my $descr = git_get_project_description($pr->{'path'}) || "";
3494                         $pr->{'descr_long'} = to_utf8($descr);
3495                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3496                 }
3497                 if (!defined $pr->{'owner'}) {
3498                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3499                 }
3500                 if ($check_forks) {
3501                         my $pname = $pr->{'path'};
3502                         if (($pname =~ s/\.git$//) &&
3503                             ($pname !~ /\/$/) &&
3504                             (-d "$projectroot/$pname")) {
3505                                 $pr->{'forks'} = "-d $projectroot/$pname";
3506                         }
3507                         else {
3508                                 $pr->{'forks'} = 0;
3509                         }
3510                 }
3511                 push @projects, $pr;
3512         }
3513
3514         $order ||= $default_projects_order;
3515         $from = 0 unless defined $from;
3516         $to = $#projects if (!defined $to || $#projects < $to);
3517
3518         print "<table class=\"project_list\">\n";
3519         unless ($no_header) {
3520                 print "<tr>\n";
3521                 if ($check_forks) {
3522                         print "<th></th>\n";
3523                 }
3524                 if ($order eq "project") {
3525                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3526                         print "<th>Project</th>\n";
3527                 } else {
3528                         print "<th>" .
3529                               $cgi->a({-href => href(project=>undef, order=>'project'),
3530                                        -class => "header"}, "Project") .
3531                               "</th>\n";
3532                 }
3533                 if ($order eq "descr") {
3534                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3535                         print "<th>Description</th>\n";
3536                 } else {
3537                         print "<th>" .
3538                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3539                                        -class => "header"}, "Description") .
3540                               "</th>\n";
3541                 }
3542                 if ($order eq "owner") {
3543                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3544                         print "<th>Owner</th>\n";
3545                 } else {
3546                         print "<th>" .
3547                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3548                                        -class => "header"}, "Owner") .
3549                               "</th>\n";
3550                 }
3551                 if ($order eq "age") {
3552                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3553                         print "<th>Last Change</th>\n";
3554                 } else {
3555                         print "<th>" .
3556                               $cgi->a({-href => href(project=>undef, order=>'age'),
3557                                        -class => "header"}, "Last Change") .
3558                               "</th>\n";
3559                 }
3560                 print "<th></th>\n" .
3561                       "</tr>\n";
3562         }
3563         my $alternate = 1;
3564         for (my $i = $from; $i <= $to; $i++) {
3565                 my $pr = $projects[$i];
3566                 if ($alternate) {
3567                         print "<tr class=\"dark\">\n";
3568                 } else {
3569                         print "<tr class=\"light\">\n";
3570                 }
3571                 $alternate ^= 1;
3572                 if ($check_forks) {
3573                         print "<td>";
3574                         if ($pr->{'forks'}) {
3575                                 print "<!-- $pr->{'forks'} -->\n";
3576                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3577                         }
3578                         print "</td>\n";
3579                 }
3580                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3581                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3582                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3583                                         -class => "list", -title => $pr->{'descr_long'}},
3584                                         esc_html($pr->{'descr'})) . "</td>\n" .
3585                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3586                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3587                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3588                       "<td class=\"link\">" .
3589                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3590                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3591                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3592                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3593                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3594                       "</td>\n" .
3595                       "</tr>\n";
3596         }
3597         if (defined $extra) {
3598                 print "<tr>\n";
3599                 if ($check_forks) {
3600                         print "<td></td>\n";
3601                 }
3602                 print "<td colspan=\"5\">$extra</td>\n" .
3603                       "</tr>\n";
3604         }
3605         print "</table>\n";
3606 }
3607
3608 sub git_shortlog_body {
3609         # uses global variable $project
3610         my ($commitlist, $from, $to, $refs, $extra) = @_;
3611
3612         $from = 0 unless defined $from;
3613         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3614
3615         print "<table class=\"shortlog\">\n";
3616         my $alternate = 1;
3617         for (my $i = $from; $i <= $to; $i++) {
3618                 my %co = %{$commitlist->[$i]};
3619                 my $commit = $co{'id'};
3620                 my $ref = format_ref_marker($refs, $commit);
3621                 if ($alternate) {
3622                         print "<tr class=\"dark\">\n";
3623                 } else {
3624                         print "<tr class=\"light\">\n";
3625                 }
3626                 $alternate ^= 1;
3627                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3628                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3629                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3630                       "<td><i>" . $author . "</i></td>\n" .
3631                       "<td>";
3632                 print format_subject_html($co{'title'}, $co{'title_short'},
3633                                           href(action=>"commit", hash=>$commit), $ref);
3634                 print "</td>\n" .
3635                       "<td class=\"link\">" .
3636                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3637                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3638                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3639                 my $snapshot_links = format_snapshot_links($commit);
3640                 if (defined $snapshot_links) {
3641                         print " | " . $snapshot_links;
3642                 }
3643                 print "</td>\n" .
3644                       "</tr>\n";
3645         }
3646         if (defined $extra) {
3647                 print "<tr>\n" .
3648                       "<td colspan=\"4\">$extra</td>\n" .
3649                       "</tr>\n";
3650         }
3651         print "</table>\n";
3652 }
3653
3654 sub git_history_body {
3655         # Warning: assumes constant type (blob or tree) during history
3656         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3657
3658         $from = 0 unless defined $from;
3659         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3660
3661         print "<table class=\"history\">\n";
3662         my $alternate = 1;
3663         for (my $i = $from; $i <= $to; $i++) {
3664                 my %co = %{$commitlist->[$i]};
3665                 if (!%co) {
3666                         next;
3667                 }
3668                 my $commit = $co{'id'};
3669
3670                 my $ref = format_ref_marker($refs, $commit);
3671
3672                 if ($alternate) {
3673                         print "<tr class=\"dark\">\n";
3674                 } else {
3675                         print "<tr class=\"light\">\n";
3676                 }
3677                 $alternate ^= 1;
3678         # shortlog uses      chop_str($co{'author_name'}, 10)
3679                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3680                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3681                       "<td><i>" . $author . "</i></td>\n" .
3682                       "<td>";
3683                 # originally git_history used chop_str($co{'title'}, 50)
3684                 print format_subject_html($co{'title'}, $co{'title_short'},
3685                                           href(action=>"commit", hash=>$commit), $ref);
3686                 print "</td>\n" .
3687                       "<td class=\"link\">" .
3688                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3689                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3690
3691                 if ($ftype eq 'blob') {
3692                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3693                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3694                         if (defined $blob_current && defined $blob_parent &&
3695                                         $blob_current ne $blob_parent) {
3696                                 print " | " .
3697                                         $cgi->a({-href => href(action=>"blobdiff",
3698                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3699                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3700                                                                file_name=>$file_name)},
3701                                                 "diff to current");
3702                         }
3703                 }
3704                 print "</td>\n" .
3705                       "</tr>\n";
3706         }
3707         if (defined $extra) {
3708                 print "<tr>\n" .
3709                       "<td colspan=\"4\">$extra</td>\n" .
3710                       "</tr>\n";
3711         }
3712         print "</table>\n";
3713 }
3714
3715 sub git_tags_body {
3716         # uses global variable $project
3717         my ($taglist, $from, $to, $extra) = @_;
3718         $from = 0 unless defined $from;
3719         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3720
3721         print "<table class=\"tags\">\n";
3722         my $alternate = 1;
3723         for (my $i = $from; $i <= $to; $i++) {
3724                 my $entry = $taglist->[$i];
3725                 my %tag = %$entry;
3726                 my $comment = $tag{'subject'};
3727                 my $comment_short;
3728                 if (defined $comment) {
3729                         $comment_short = chop_str($comment, 30, 5);
3730                 }
3731                 if ($alternate) {
3732                         print "<tr class=\"dark\">\n";
3733                 } else {
3734                         print "<tr class=\"light\">\n";
3735                 }
3736                 $alternate ^= 1;
3737                 if (defined $tag{'age'}) {
3738                         print "<td><i>$tag{'age'}</i></td>\n";
3739                 } else {
3740                         print "<td></td>\n";
3741                 }
3742                 print "<td>" .
3743                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3744                                -class => "list name"}, esc_html($tag{'name'})) .
3745                       "</td>\n" .
3746                       "<td>";
3747                 if (defined $comment) {
3748                         print format_subject_html($comment, $comment_short,
3749                                                   href(action=>"tag", hash=>$tag{'id'}));
3750                 }
3751                 print "</td>\n" .
3752                       "<td class=\"selflink\">";
3753                 if ($tag{'type'} eq "tag") {
3754                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3755                 } else {
3756                         print "&nbsp;";
3757                 }
3758                 print "</td>\n" .
3759                       "<td class=\"link\">" . " | " .
3760                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3761                 if ($tag{'reftype'} eq "commit") {
3762                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3763                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3764                 } elsif ($tag{'reftype'} eq "blob") {
3765                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3766                 }
3767                 print "</td>\n" .
3768                       "</tr>";
3769         }
3770         if (defined $extra) {
3771                 print "<tr>\n" .
3772                       "<td colspan=\"5\">$extra</td>\n" .
3773                       "</tr>\n";
3774         }
3775         print "</table>\n";
3776 }
3777
3778 sub git_heads_body {
3779         # uses global variable $project
3780         my ($headlist, $head, $from, $to, $extra) = @_;
3781         $from = 0 unless defined $from;
3782         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3783
3784         print "<table class=\"heads\">\n";
3785         my $alternate = 1;
3786         for (my $i = $from; $i <= $to; $i++) {
3787                 my $entry = $headlist->[$i];
3788                 my %ref = %$entry;
3789                 my $curr = $ref{'id'} eq $head;
3790                 if ($alternate) {
3791                         print "<tr class=\"dark\">\n";
3792                 } else {
3793                         print "<tr class=\"light\">\n";
3794                 }
3795                 $alternate ^= 1;
3796                 print "<td><i>$ref{'age'}</i></td>\n" .
3797                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3798                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3799                                -class => "list name"},esc_html($ref{'name'})) .
3800                       "</td>\n" .
3801                       "<td class=\"link\">" .
3802                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3803                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3804                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3805                       "</td>\n" .
3806                       "</tr>";
3807         }
3808         if (defined $extra) {
3809                 print "<tr>\n" .
3810                       "<td colspan=\"3\">$extra</td>\n" .
3811                       "</tr>\n";
3812         }
3813         print "</table>\n";
3814 }
3815
3816 sub git_search_grep_body {
3817         my ($commitlist, $from, $to, $extra) = @_;
3818         $from = 0 unless defined $from;
3819         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3820
3821         print "<table class=\"commit_search\">\n";
3822         my $alternate = 1;
3823         for (my $i = $from; $i <= $to; $i++) {
3824                 my %co = %{$commitlist->[$i]};
3825                 if (!%co) {
3826                         next;
3827                 }
3828                 my $commit = $co{'id'};
3829                 if ($alternate) {
3830                         print "<tr class=\"dark\">\n";
3831                 } else {
3832                         print "<tr class=\"light\">\n";
3833                 }
3834                 $alternate ^= 1;
3835                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3836                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3837                       "<td><i>" . $author . "</i></td>\n" .
3838                       "<td>" .
3839                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3840                                -class => "list subject"},
3841                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3842                 my $comment = $co{'comment'};
3843                 foreach my $line (@$comment) {
3844                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3845                                 my ($lead, $match, $trail) = ($1, $2, $3);
3846                                 $match = chop_str($match, 70, 5, 'center');
3847                                 my $contextlen = int((80 - length($match))/2);
3848                                 $contextlen = 30 if ($contextlen > 30);
3849                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3850                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3851
3852                                 $lead  = esc_html($lead);
3853                                 $match = esc_html($match);
3854                                 $trail = esc_html($trail);
3855
3856                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3857                         }
3858                 }
3859                 print "</td>\n" .
3860                       "<td class=\"link\">" .
3861                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3862                       " | " .
3863                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3864                       " | " .
3865                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3866                 print "</td>\n" .
3867                       "</tr>\n";
3868         }
3869         if (defined $extra) {
3870                 print "<tr>\n" .
3871                       "<td colspan=\"3\">$extra</td>\n" .
3872                       "</tr>\n";
3873         }
3874         print "</table>\n";
3875 }
3876
3877 ## ======================================================================
3878 ## ======================================================================
3879 ## actions
3880
3881 sub git_project_list {
3882         my $order = $cgi->param('o');
3883         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3884                 die_error(undef, "Unknown order parameter");
3885         }
3886
3887         my @list = git_get_projects_list();
3888         if (!@list) {
3889                 die_error(undef, "No projects found");
3890         }
3891
3892         git_header_html();
3893         if (-f $home_text) {
3894                 print "<div class=\"index_include\">\n";
3895                 open (my $fd, $home_text);
3896                 print <$fd>;
3897                 close $fd;
3898                 print "</div>\n";
3899         }
3900         git_project_list_body(\@list, $order);
3901         git_footer_html();
3902 }
3903
3904 sub git_forks {
3905         my $order = $cgi->param('o');
3906         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3907                 die_error(undef, "Unknown order parameter");
3908         }
3909
3910         my @list = git_get_projects_list($project);
3911         if (!@list) {
3912                 die_error(undef, "No forks found");
3913         }
3914
3915         git_header_html();
3916         git_print_page_nav('','');
3917         git_print_header_div('summary', "$project forks");
3918         git_project_list_body(\@list, $order);
3919         git_footer_html();
3920 }
3921
3922 sub git_project_index {
3923         my @projects = git_get_projects_list($project);
3924
3925         print $cgi->header(
3926                 -type => 'text/plain',
3927                 -charset => 'utf-8',
3928                 -content_disposition => 'inline; filename="index.aux"');
3929
3930         foreach my $pr (@projects) {
3931                 if (!exists $pr->{'owner'}) {
3932                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3933                 }
3934
3935                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3936                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3937                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3938                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3939                 $path  =~ s/ /\+/g;
3940                 $owner =~ s/ /\+/g;
3941
3942                 print "$path $owner\n";
3943         }
3944 }
3945
3946 sub git_summary {
3947         my $descr = git_get_project_description($project) || "none";
3948         my %co = parse_commit("HEAD");
3949         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3950         my $head = $co{'id'};
3951
3952         my $owner = git_get_project_owner($project);
3953
3954         my $refs = git_get_references();
3955         # These get_*_list functions return one more to allow us to see if
3956         # there are more ...
3957         my @taglist  = git_get_tags_list(16);
3958         my @headlist = git_get_heads_list(16);
3959         my @forklist;
3960         my ($check_forks) = gitweb_check_feature('forks');
3961
3962         if ($check_forks) {
3963                 @forklist = git_get_projects_list($project);
3964         }
3965
3966         git_header_html();
3967         git_print_page_nav('summary','', $head);
3968
3969         print "<div class=\"title\">&nbsp;</div>\n";
3970         print "<table class=\"projects_list\">\n" .
3971               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
3972               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
3973         if (defined $cd{'rfc2822'}) {
3974                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
3975         }
3976
3977         # use per project git URL list in $projectroot/$project/cloneurl
3978         # or make project git URL from git base URL and project name
3979         my $url_tag = "URL";
3980         my @url_list = git_get_project_url_list($project);
3981         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
3982         foreach my $git_url (@url_list) {
3983                 next unless $git_url;
3984                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
3985                 $url_tag = "";
3986         }
3987         print "</table>\n";
3988
3989         if (-s "$projectroot/$project/README.html") {
3990                 if (open my $fd, "$projectroot/$project/README.html") {
3991                         print "<div class=\"title\">readme</div>\n" .
3992                               "<div class=\"readme\">\n";
3993                         print $_ while (<$fd>);
3994                         print "\n</div>\n"; # class="readme"
3995                         close $fd;
3996                 }
3997         }
3998
3999         # we need to request one more than 16 (0..15) to check if
4000         # those 16 are all
4001         my @commitlist = $head ? parse_commits($head, 17) : ();
4002         if (@commitlist) {
4003                 git_print_header_div('shortlog');
4004                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4005                                   $#commitlist <=  15 ? undef :
4006                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4007         }
4008
4009         if (@taglist) {
4010                 git_print_header_div('tags');
4011                 git_tags_body(\@taglist, 0, 15,
4012                               $#taglist <=  15 ? undef :
4013                               $cgi->a({-href => href(action=>"tags")}, "..."));
4014         }
4015
4016         if (@headlist) {
4017                 git_print_header_div('heads');
4018                 git_heads_body(\@headlist, $head, 0, 15,
4019                                $#headlist <= 15 ? undef :
4020                                $cgi->a({-href => href(action=>"heads")}, "..."));
4021         }
4022
4023         if (@forklist) {
4024                 git_print_header_div('forks');
4025                 git_project_list_body(\@forklist, undef, 0, 15,
4026                                       $#forklist <= 15 ? undef :
4027                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4028                                       'noheader');
4029         }
4030
4031         git_footer_html();
4032 }
4033
4034 sub git_tag {
4035         my $head = git_get_head_hash($project);
4036         git_header_html();
4037         git_print_page_nav('','', $head,undef,$head);
4038         my %tag = parse_tag($hash);
4039
4040         if (! %tag) {
4041                 die_error(undef, "Unknown tag object");
4042         }
4043
4044         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4045         print "<div class=\"title_text\">\n" .
4046               "<table class=\"object_header\">\n" .
4047               "<tr>\n" .
4048               "<td>object</td>\n" .
4049               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4050                                $tag{'object'}) . "</td>\n" .
4051               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4052                                               $tag{'type'}) . "</td>\n" .
4053               "</tr>\n";
4054         if (defined($tag{'author'})) {
4055                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4056                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4057                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4058                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4059                         "</td></tr>\n";
4060         }
4061         print "</table>\n\n" .
4062               "</div>\n";
4063         print "<div class=\"page_body\">";
4064         my $comment = $tag{'comment'};
4065         foreach my $line (@$comment) {
4066                 chomp $line;
4067                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4068         }
4069         print "</div>\n";
4070         git_footer_html();
4071 }
4072
4073 sub git_blame2 {
4074         my $fd;
4075         my $ftype;
4076
4077         my ($have_blame) = gitweb_check_feature('blame');
4078         if (!$have_blame) {
4079                 die_error('403 Permission denied', "Permission denied");
4080         }
4081         die_error('404 Not Found', "File name not defined") if (!$file_name);
4082         $hash_base ||= git_get_head_hash($project);
4083         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4084         my %co = parse_commit($hash_base)
4085                 or die_error(undef, "Reading commit failed");
4086         if (!defined $hash) {
4087                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4088                         or die_error(undef, "Error looking up file");
4089         }
4090         $ftype = git_get_type($hash);
4091         if ($ftype !~ "blob") {
4092                 die_error('400 Bad Request', "Object is not a blob");
4093         }
4094         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4095               $file_name, $hash_base)
4096                 or die_error(undef, "Open git-blame failed");
4097         git_header_html();
4098         my $formats_nav =
4099                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4100                         "blob") .
4101                 " | " .
4102                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4103                         "history") .
4104                 " | " .
4105                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4106                         "HEAD");
4107         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4108         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4109         git_print_page_path($file_name, $ftype, $hash_base);
4110         my @rev_color = (qw(light2 dark2));
4111         my $num_colors = scalar(@rev_color);
4112         my $current_color = 0;
4113         my $last_rev;
4114         print <<HTML;
4115 <div class="page_body">
4116 <table class="blame">
4117 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4118 HTML
4119         my %metainfo = ();
4120         while (1) {
4121                 $_ = <$fd>;
4122                 last unless defined $_;
4123                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4124                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4125                 if (!exists $metainfo{$full_rev}) {
4126                         $metainfo{$full_rev} = {};
4127                 }
4128                 my $meta = $metainfo{$full_rev};
4129                 while (<$fd>) {
4130                         last if (s/^\t//);
4131                         if (/^(\S+) (.*)$/) {
4132                                 $meta->{$1} = $2;
4133                         }
4134                 }
4135                 my $data = $_;
4136                 chomp $data;
4137                 my $rev = substr($full_rev, 0, 8);
4138                 my $author = $meta->{'author'};
4139                 my %date = parse_date($meta->{'author-time'},
4140                                       $meta->{'author-tz'});
4141                 my $date = $date{'iso-tz'};
4142                 if ($group_size) {
4143                         $current_color = ++$current_color % $num_colors;
4144                 }
4145                 print "<tr class=\"$rev_color[$current_color]\">\n";
4146                 if ($group_size) {
4147                         print "<td class=\"sha1\"";
4148                         print " title=\"". esc_html($author) . ", $date\"";
4149                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4150                         print ">";
4151                         print $cgi->a({-href => href(action=>"commit",
4152                                                      hash=>$full_rev,
4153                                                      file_name=>$file_name)},
4154                                       esc_html($rev));
4155                         print "</td>\n";
4156                 }
4157                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4158                         or die_error(undef, "Open git-rev-parse failed");
4159                 my $parent_commit = <$dd>;
4160                 close $dd;
4161                 chomp($parent_commit);
4162                 my $blamed = href(action => 'blame',
4163                                   file_name => $meta->{'filename'},
4164                                   hash_base => $parent_commit);
4165                 print "<td class=\"linenr\">";
4166                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4167                                 -id => "l$lineno",
4168                                 -class => "linenr" },
4169                               esc_html($lineno));
4170                 print "</td>";
4171                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4172                 print "</tr>\n";
4173         }
4174         print "</table>\n";
4175         print "</div>";
4176         close $fd
4177                 or print "Reading blob failed\n";
4178         git_footer_html();
4179 }
4180
4181 sub git_blame {
4182         my $fd;
4183
4184         my ($have_blame) = gitweb_check_feature('blame');
4185         if (!$have_blame) {
4186                 die_error('403 Permission denied', "Permission denied");
4187         }
4188         die_error('404 Not Found', "File name not defined") if (!$file_name);
4189         $hash_base ||= git_get_head_hash($project);
4190         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4191         my %co = parse_commit($hash_base)
4192                 or die_error(undef, "Reading commit failed");
4193         if (!defined $hash) {
4194                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4195                         or die_error(undef, "Error lookup file");
4196         }
4197         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4198                 or die_error(undef, "Open git-annotate failed");
4199         git_header_html();
4200         my $formats_nav =
4201                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4202                         "blob") .
4203                 " | " .
4204                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4205                         "history") .
4206                 " | " .
4207                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4208                         "HEAD");
4209         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4210         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4211         git_print_page_path($file_name, 'blob', $hash_base);
4212         print "<div class=\"page_body\">\n";
4213         print <<HTML;
4214 <table class="blame">
4215   <tr>
4216     <th>Commit</th>
4217     <th>Age</th>
4218     <th>Author</th>
4219     <th>Line</th>
4220     <th>Data</th>
4221   </tr>
4222 HTML
4223         my @line_class = (qw(light dark));
4224         my $line_class_len = scalar (@line_class);
4225         my $line_class_num = $#line_class;
4226         while (my $line = <$fd>) {
4227                 my $long_rev;
4228                 my $short_rev;
4229                 my $author;
4230                 my $time;
4231                 my $lineno;
4232                 my $data;
4233                 my $age;
4234                 my $age_str;
4235                 my $age_class;
4236
4237                 chomp $line;
4238                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4239
4240                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4241                         $long_rev = $1;
4242                         $author   = $2;
4243                         $time     = $3;
4244                         $lineno   = $4;
4245                         $data     = $5;
4246                 } else {
4247                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4248                         next;
4249                 }
4250                 $short_rev  = substr ($long_rev, 0, 8);
4251                 $age        = time () - $time;
4252                 $age_str    = age_string ($age);
4253                 $age_str    =~ s/ /&nbsp;/g;
4254                 $age_class  = age_class($age);
4255                 $author     = esc_html ($author);
4256                 $author     =~ s/ /&nbsp;/g;
4257
4258                 $data = untabify($data);
4259                 $data = esc_html ($data);
4260
4261                 print <<HTML;
4262   <tr class="$line_class[$line_class_num]">
4263     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4264     <td class="$age_class">$age_str</td>
4265     <td>$author</td>
4266     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4267     <td class="pre">$data</td>
4268   </tr>
4269 HTML
4270         } # while (my $line = <$fd>)
4271         print "</table>\n\n";
4272         close $fd
4273                 or print "Reading blob failed.\n";
4274         print "</div>";
4275         git_footer_html();
4276 }
4277
4278 sub git_tags {
4279         my $head = git_get_head_hash($project);
4280         git_header_html();
4281         git_print_page_nav('','', $head,undef,$head);
4282         git_print_header_div('summary', $project);
4283
4284         my @tagslist = git_get_tags_list();
4285         if (@tagslist) {
4286                 git_tags_body(\@tagslist);
4287         }
4288         git_footer_html();
4289 }
4290
4291 sub git_heads {
4292         my $head = git_get_head_hash($project);
4293         git_header_html();
4294         git_print_page_nav('','', $head,undef,$head);
4295         git_print_header_div('summary', $project);
4296
4297         my @headslist = git_get_heads_list();
4298         if (@headslist) {
4299                 git_heads_body(\@headslist, $head);
4300         }
4301         git_footer_html();
4302 }
4303
4304 sub git_blob_plain {
4305         my $expires;
4306
4307         if (!defined $hash) {
4308                 if (defined $file_name) {
4309                         my $base = $hash_base || git_get_head_hash($project);
4310                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4311                                 or die_error(undef, "Error lookup file");
4312                 } else {
4313                         die_error(undef, "No file name defined");
4314                 }
4315         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4316                 # blobs defined by non-textual hash id's can be cached
4317                 $expires = "+1d";
4318         }
4319
4320         my $type = shift;
4321         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4322                 or die_error(undef, "Couldn't cat $file_name, $hash");
4323
4324         $type ||= blob_mimetype($fd, $file_name);
4325
4326         # save as filename, even when no $file_name is given
4327         my $save_as = "$hash";
4328         if (defined $file_name) {
4329                 $save_as = $file_name;
4330         } elsif ($type =~ m/^text\//) {
4331                 $save_as .= '.txt';
4332         }
4333
4334         print $cgi->header(
4335                 -type => "$type",
4336                 -expires=>$expires,
4337                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4338         undef $/;
4339         binmode STDOUT, ':raw';
4340         print <$fd>;
4341         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4342         $/ = "\n";
4343         close $fd;
4344 }
4345
4346 sub git_blob {
4347         my $expires;
4348
4349         if (!defined $hash) {
4350                 if (defined $file_name) {
4351                         my $base = $hash_base || git_get_head_hash($project);
4352                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4353                                 or die_error(undef, "Error lookup file");
4354                 } else {
4355                         die_error(undef, "No file name defined");
4356                 }
4357         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4358                 # blobs defined by non-textual hash id's can be cached
4359                 $expires = "+1d";
4360         }
4361
4362         my ($have_blame) = gitweb_check_feature('blame');
4363         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4364                 or die_error(undef, "Couldn't cat $file_name, $hash");
4365         my $mimetype = blob_mimetype($fd, $file_name);
4366         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4367                 close $fd;
4368                 return git_blob_plain($mimetype);
4369         }
4370         # we can have blame only for text/* mimetype
4371         $have_blame &&= ($mimetype =~ m!^text/!);
4372
4373         git_header_html(undef, $expires);
4374         my $formats_nav = '';
4375         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4376                 if (defined $file_name) {
4377                         if ($have_blame) {
4378                                 $formats_nav .=
4379                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4380                                                 "blame") .
4381                                         " | ";
4382                         }
4383                         $formats_nav .=
4384                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4385                                         "history") .
4386                                 " | " .
4387                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4388                                         "raw") .
4389                                 " | " .
4390                                 $cgi->a({-href => href(action=>"blob",
4391                                                        hash_base=>"HEAD", file_name=>$file_name)},
4392                                         "HEAD");
4393                 } else {
4394                         $formats_nav .=
4395                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4396                                         "raw");
4397                 }
4398                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4399                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4400         } else {
4401                 print "<div class=\"page_nav\">\n" .
4402                       "<br/><br/></div>\n" .
4403                       "<div class=\"title\">$hash</div>\n";
4404         }
4405         git_print_page_path($file_name, "blob", $hash_base);
4406         print "<div class=\"page_body\">\n";
4407         if ($mimetype =~ m!^image/!) {
4408                 print qq!<img type="$mimetype"!;
4409                 if ($file_name) {
4410                         print qq! alt="$file_name" title="$file_name"!;
4411                 }
4412                 print qq! src="! .
4413                       href(action=>"blob_plain", hash=>$hash,
4414                            hash_base=>$hash_base, file_name=>$file_name) .
4415                       qq!" />\n!;
4416         } else {
4417                 my $nr;
4418                 while (my $line = <$fd>) {
4419                         chomp $line;
4420                         $nr++;
4421                         $line = untabify($line);
4422                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4423                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4424                 }
4425         }
4426         close $fd
4427                 or print "Reading blob failed.\n";
4428         print "</div>";
4429         git_footer_html();
4430 }
4431
4432 sub git_tree {
4433         if (!defined $hash_base) {
4434                 $hash_base = "HEAD";
4435         }
4436         if (!defined $hash) {
4437                 if (defined $file_name) {
4438                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4439                 } else {
4440                         $hash = $hash_base;
4441                 }
4442         }
4443         $/ = "\0";
4444         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4445                 or die_error(undef, "Open git-ls-tree failed");
4446         my @entries = map { chomp; $_ } <$fd>;
4447         close $fd or die_error(undef, "Reading tree failed");
4448         $/ = "\n";
4449
4450         my $refs = git_get_references();
4451         my $ref = format_ref_marker($refs, $hash_base);
4452         git_header_html();
4453         my $basedir = '';
4454         my ($have_blame) = gitweb_check_feature('blame');
4455         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4456                 my @views_nav = ();
4457                 if (defined $file_name) {
4458                         push @views_nav,
4459                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4460                                         "history"),
4461                                 $cgi->a({-href => href(action=>"tree",
4462                                                        hash_base=>"HEAD", file_name=>$file_name)},
4463                                         "HEAD"),
4464                 }
4465                 my $snapshot_links = format_snapshot_links($hash);
4466                 if (defined $snapshot_links) {
4467                         # FIXME: Should be available when we have no hash base as well.
4468                         push @views_nav, $snapshot_links;
4469                 }
4470                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4471                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4472         } else {
4473                 undef $hash_base;
4474                 print "<div class=\"page_nav\">\n";
4475                 print "<br/><br/></div>\n";
4476                 print "<div class=\"title\">$hash</div>\n";
4477         }
4478         if (defined $file_name) {
4479                 $basedir = $file_name;
4480                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4481                         $basedir .= '/';
4482                 }
4483         }
4484         git_print_page_path($file_name, 'tree', $hash_base);
4485         print "<div class=\"page_body\">\n";
4486         print "<table class=\"tree\">\n";
4487         my $alternate = 1;
4488         # '..' (top directory) link if possible
4489         if (defined $hash_base &&
4490             defined $file_name && $file_name =~ m![^/]+$!) {
4491                 if ($alternate) {
4492                         print "<tr class=\"dark\">\n";
4493                 } else {
4494                         print "<tr class=\"light\">\n";
4495                 }
4496                 $alternate ^= 1;
4497
4498                 my $up = $file_name;
4499                 $up =~ s!/?[^/]+$!!;
4500                 undef $up unless $up;
4501                 # based on git_print_tree_entry
4502                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4503                 print '<td class="list">';
4504                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4505                                              file_name=>$up)},
4506                               "..");
4507                 print "</td>\n";
4508                 print "<td class=\"link\"></td>\n";
4509
4510                 print "</tr>\n";
4511         }
4512         foreach my $line (@entries) {
4513                 my %t = parse_ls_tree_line($line, -z => 1);
4514
4515                 if ($alternate) {
4516                         print "<tr class=\"dark\">\n";
4517                 } else {
4518                         print "<tr class=\"light\">\n";
4519                 }
4520                 $alternate ^= 1;
4521
4522                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4523
4524                 print "</tr>\n";
4525         }
4526         print "</table>\n" .
4527               "</div>";
4528         git_footer_html();
4529 }
4530
4531 sub git_snapshot {
4532         my @supported_fmts = gitweb_check_feature('snapshot');
4533         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4534
4535         my $format = $cgi->param('sf');
4536         if (!@supported_fmts) {
4537                 die_error('403 Permission denied', "Permission denied");
4538         }
4539         # default to first supported snapshot format
4540         $format ||= $supported_fmts[0];
4541         if ($format !~ m/^[a-z0-9]+$/) {
4542                 die_error(undef, "Invalid snapshot format parameter");
4543         } elsif (!exists($known_snapshot_formats{$format})) {
4544                 die_error(undef, "Unknown snapshot format");
4545         } elsif (!grep($_ eq $format, @supported_fmts)) {
4546                 die_error(undef, "Unsupported snapshot format");
4547         }
4548
4549         if (!defined $hash) {
4550                 $hash = git_get_head_hash($project);
4551         }
4552
4553         my $git_command = git_cmd_str();
4554         my $name = $project;
4555         $name =~ s,([^/])/*\.git$,$1,;
4556         $name = basename($name);
4557         my $filename = to_utf8($name);
4558         $name =~ s/\047/\047\\\047\047/g;
4559         my $cmd;
4560         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4561         $cmd = "$git_command archive " .
4562                 "--format=$known_snapshot_formats{$format}{'format'} " .
4563                 "--prefix=\'$name\'/ $hash";
4564         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4565                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4566         }
4567
4568         print $cgi->header(
4569                 -type => $known_snapshot_formats{$format}{'type'},
4570                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4571                 -status => '200 OK');
4572
4573         open my $fd, "-|", $cmd
4574                 or die_error(undef, "Execute git-archive failed");
4575         binmode STDOUT, ':raw';
4576         print <$fd>;
4577         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4578         close $fd;
4579 }
4580
4581 sub git_log {
4582         my $head = git_get_head_hash($project);
4583         if (!defined $hash) {
4584                 $hash = $head;
4585         }
4586         if (!defined $page) {
4587                 $page = 0;
4588         }
4589         my $refs = git_get_references();
4590
4591         my @commitlist = parse_commits($hash, 101, (100 * $page));
4592
4593         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4594
4595         git_header_html();
4596         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4597
4598         if (!@commitlist) {
4599                 my %co = parse_commit($hash);
4600
4601                 git_print_header_div('summary', $project);
4602                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4603         }
4604         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4605         for (my $i = 0; $i <= $to; $i++) {
4606                 my %co = %{$commitlist[$i]};
4607                 next if !%co;
4608                 my $commit = $co{'id'};
4609                 my $ref = format_ref_marker($refs, $commit);
4610                 my %ad = parse_date($co{'author_epoch'});
4611                 git_print_header_div('commit',
4612                                "<span class=\"age\">$co{'age_string'}</span>" .
4613                                esc_html($co{'title'}) . $ref,
4614                                $commit);
4615                 print "<div class=\"title_text\">\n" .
4616                       "<div class=\"log_link\">\n" .
4617                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4618                       " | " .
4619                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4620                       " | " .
4621                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4622                       "<br/>\n" .
4623                       "</div>\n" .
4624                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4625                       "</div>\n";
4626
4627                 print "<div class=\"log_body\">\n";
4628                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4629                 print "</div>\n";
4630         }
4631         if ($#commitlist >= 100) {
4632                 print "<div class=\"page_nav\">\n";
4633                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4634                                -accesskey => "n", -title => "Alt-n"}, "next");
4635                 print "</div>\n";
4636         }
4637         git_footer_html();
4638 }
4639
4640 sub git_commit {
4641         $hash ||= $hash_base || "HEAD";
4642         my %co = parse_commit($hash);
4643         if (!%co) {
4644                 die_error(undef, "Unknown commit object");
4645         }
4646         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4647         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4648
4649         my $parent  = $co{'parent'};
4650         my $parents = $co{'parents'}; # listref
4651
4652         # we need to prepare $formats_nav before any parameter munging
4653         my $formats_nav;
4654         if (!defined $parent) {
4655                 # --root commitdiff
4656                 $formats_nav .= '(initial)';
4657         } elsif (@$parents == 1) {
4658                 # single parent commit
4659                 $formats_nav .=
4660                         '(parent: ' .
4661                         $cgi->a({-href => href(action=>"commit",
4662                                                hash=>$parent)},
4663                                 esc_html(substr($parent, 0, 7))) .
4664                         ')';
4665         } else {
4666                 # merge commit
4667                 $formats_nav .=
4668                         '(merge: ' .
4669                         join(' ', map {
4670                                 $cgi->a({-href => href(action=>"commit",
4671                                                        hash=>$_)},
4672                                         esc_html(substr($_, 0, 7)));
4673                         } @$parents ) .
4674                         ')';
4675         }
4676
4677         if (!defined $parent) {
4678                 $parent = "--root";
4679         }
4680         my @difftree;
4681         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4682                 @diff_opts,
4683                 (@$parents <= 1 ? $parent : '-c'),
4684                 $hash, "--"
4685                 or die_error(undef, "Open git-diff-tree failed");
4686         @difftree = map { chomp; $_ } <$fd>;
4687         close $fd or die_error(undef, "Reading git-diff-tree failed");
4688
4689         # non-textual hash id's can be cached
4690         my $expires;
4691         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4692                 $expires = "+1d";
4693         }
4694         my $refs = git_get_references();
4695         my $ref = format_ref_marker($refs, $co{'id'});
4696
4697         git_header_html(undef, $expires);
4698         git_print_page_nav('commit', '',
4699                            $hash, $co{'tree'}, $hash,
4700                            $formats_nav);
4701
4702         if (defined $co{'parent'}) {
4703                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4704         } else {
4705                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4706         }
4707         print "<div class=\"title_text\">\n" .
4708               "<table class=\"object_header\">\n";
4709         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4710               "<tr>" .
4711               "<td></td><td> $ad{'rfc2822'}";
4712         if ($ad{'hour_local'} < 6) {
4713                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4714                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4715         } else {
4716                 printf(" (%02d:%02d %s)",
4717                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4718         }
4719         print "</td>" .
4720               "</tr>\n";
4721         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4722         print "<tr><td></td><td> $cd{'rfc2822'}" .
4723               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4724               "</td></tr>\n";
4725         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4726         print "<tr>" .
4727               "<td>tree</td>" .
4728               "<td class=\"sha1\">" .
4729               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4730                        class => "list"}, $co{'tree'}) .
4731               "</td>" .
4732               "<td class=\"link\">" .
4733               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4734                       "tree");
4735         my $snapshot_links = format_snapshot_links($hash);
4736         if (defined $snapshot_links) {
4737                 print " | " . $snapshot_links;
4738         }
4739         print "</td>" .
4740               "</tr>\n";
4741
4742         foreach my $par (@$parents) {
4743                 print "<tr>" .
4744                       "<td>parent</td>" .
4745                       "<td class=\"sha1\">" .
4746                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4747                                class => "list"}, $par) .
4748                       "</td>" .
4749                       "<td class=\"link\">" .
4750                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4751                       " | " .
4752                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4753                       "</td>" .
4754                       "</tr>\n";
4755         }
4756         print "</table>".
4757               "</div>\n";
4758
4759         print "<div class=\"page_body\">\n";
4760         git_print_log($co{'comment'});
4761         print "</div>\n";
4762
4763         git_difftree_body(\@difftree, $hash, @$parents);
4764
4765         git_footer_html();
4766 }
4767
4768 sub git_object {
4769         # object is defined by:
4770         # - hash or hash_base alone
4771         # - hash_base and file_name
4772         my $type;
4773
4774         # - hash or hash_base alone
4775         if ($hash || ($hash_base && !defined $file_name)) {
4776                 my $object_id = $hash || $hash_base;
4777
4778                 my $git_command = git_cmd_str();
4779                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4780                         or die_error('404 Not Found', "Object does not exist");
4781                 $type = <$fd>;
4782                 chomp $type;
4783                 close $fd
4784                         or die_error('404 Not Found', "Object does not exist");
4785
4786         # - hash_base and file_name
4787         } elsif ($hash_base && defined $file_name) {
4788                 $file_name =~ s,/+$,,;
4789
4790                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4791                         or die_error('404 Not Found', "Base object does not exist");
4792
4793                 # here errors should not hapen
4794                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4795                         or die_error(undef, "Open git-ls-tree failed");
4796                 my $line = <$fd>;
4797                 close $fd;
4798
4799                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4800                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4801                         die_error('404 Not Found', "File or directory for given base does not exist");
4802                 }
4803                 $type = $2;
4804                 $hash = $3;
4805         } else {
4806                 die_error('404 Not Found', "Not enough information to find object");
4807         }
4808
4809         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4810                                           hash=>$hash, hash_base=>$hash_base,
4811                                           file_name=>$file_name),
4812                              -status => '302 Found');
4813 }
4814
4815 sub git_blobdiff {
4816         my $format = shift || 'html';
4817
4818         my $fd;
4819         my @difftree;
4820         my %diffinfo;
4821         my $expires;
4822
4823         # preparing $fd and %diffinfo for git_patchset_body
4824         # new style URI
4825         if (defined $hash_base && defined $hash_parent_base) {
4826                 if (defined $file_name) {
4827                         # read raw output
4828                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4829                                 $hash_parent_base, $hash_base,
4830                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4831                                 or die_error(undef, "Open git-diff-tree failed");
4832                         @difftree = map { chomp; $_ } <$fd>;
4833                         close $fd
4834                                 or die_error(undef, "Reading git-diff-tree failed");
4835                         @difftree
4836                                 or die_error('404 Not Found', "Blob diff not found");
4837
4838                 } elsif (defined $hash &&
4839                          $hash =~ /[0-9a-fA-F]{40}/) {
4840                         # try to find filename from $hash
4841
4842                         # read filtered raw output
4843                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4844                                 $hash_parent_base, $hash_base, "--"
4845                                 or die_error(undef, "Open git-diff-tree failed");
4846                         @difftree =
4847                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4848                                 # $hash == to_id
4849                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4850                                 map { chomp; $_ } <$fd>;
4851                         close $fd
4852                                 or die_error(undef, "Reading git-diff-tree failed");
4853                         @difftree
4854                                 or die_error('404 Not Found', "Blob diff not found");
4855
4856                 } else {
4857                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4858                 }
4859
4860                 if (@difftree > 1) {
4861                         die_error('404 Not Found', "Ambiguous blob diff specification");
4862                 }
4863
4864                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4865                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4866                 $file_name   ||= $diffinfo{'to_file'};
4867
4868                 $hash_parent ||= $diffinfo{'from_id'};
4869                 $hash        ||= $diffinfo{'to_id'};
4870
4871                 # non-textual hash id's can be cached
4872                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4873                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4874                         $expires = '+1d';
4875                 }
4876
4877                 # open patch output
4878                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4879                         '-p', ($format eq 'html' ? "--full-index" : ()),
4880                         $hash_parent_base, $hash_base,
4881                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4882                         or die_error(undef, "Open git-diff-tree failed");
4883         }
4884
4885         # old/legacy style URI
4886         if (!%diffinfo && # if new style URI failed
4887             defined $hash && defined $hash_parent) {
4888                 # fake git-diff-tree raw output
4889                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4890                 $diffinfo{'from_id'} = $hash_parent;
4891                 $diffinfo{'to_id'}   = $hash;
4892                 if (defined $file_name) {
4893                         if (defined $file_parent) {
4894                                 $diffinfo{'status'} = '2';
4895                                 $diffinfo{'from_file'} = $file_parent;
4896                                 $diffinfo{'to_file'}   = $file_name;
4897                         } else { # assume not renamed
4898                                 $diffinfo{'status'} = '1';
4899                                 $diffinfo{'from_file'} = $file_name;
4900                                 $diffinfo{'to_file'}   = $file_name;
4901                         }
4902                 } else { # no filename given
4903                         $diffinfo{'status'} = '2';
4904                         $diffinfo{'from_file'} = $hash_parent;
4905                         $diffinfo{'to_file'}   = $hash;
4906                 }
4907
4908                 # non-textual hash id's can be cached
4909                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4910                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4911                         $expires = '+1d';
4912                 }
4913
4914                 # open patch output
4915                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4916                         '-p', ($format eq 'html' ? "--full-index" : ()),
4917                         $hash_parent, $hash, "--"
4918                         or die_error(undef, "Open git-diff failed");
4919         } else  {
4920                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4921                         unless %diffinfo;
4922         }
4923
4924         # header
4925         if ($format eq 'html') {
4926                 my $formats_nav =
4927                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4928                                 "raw");
4929                 git_header_html(undef, $expires);
4930                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4931                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4932                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4933                 } else {
4934                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4935                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4936                 }
4937                 if (defined $file_name) {
4938                         git_print_page_path($file_name, "blob", $hash_base);
4939                 } else {
4940                         print "<div class=\"page_path\"></div>\n";
4941                 }
4942
4943         } elsif ($format eq 'plain') {
4944                 print $cgi->header(
4945                         -type => 'text/plain',
4946                         -charset => 'utf-8',
4947                         -expires => $expires,
4948                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4949
4950                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4951
4952         } else {
4953                 die_error(undef, "Unknown blobdiff format");
4954         }
4955
4956         # patch
4957         if ($format eq 'html') {
4958                 print "<div class=\"page_body\">\n";
4959
4960                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
4961                 close $fd;
4962
4963                 print "</div>\n"; # class="page_body"
4964                 git_footer_html();
4965
4966         } else {
4967                 while (my $line = <$fd>) {
4968                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
4969                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
4970
4971                         print $line;
4972
4973                         last if $line =~ m!^\+\+\+!;
4974                 }
4975                 local $/ = undef;
4976                 print <$fd>;
4977                 close $fd;
4978         }
4979 }
4980
4981 sub git_blobdiff_plain {
4982         git_blobdiff('plain');
4983 }
4984
4985 sub git_commitdiff {
4986         my $format = shift || 'html';
4987         $hash ||= $hash_base || "HEAD";
4988         my %co = parse_commit($hash);
4989         if (!%co) {
4990                 die_error(undef, "Unknown commit object");
4991         }
4992
4993         # choose format for commitdiff for merge
4994         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
4995                 $hash_parent = '--cc';
4996         }
4997         # we need to prepare $formats_nav before almost any parameter munging
4998         my $formats_nav;
4999         if ($format eq 'html') {
5000                 $formats_nav =
5001                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5002                                 "raw");
5003
5004                 if (defined $hash_parent &&
5005                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5006                         # commitdiff with two commits given
5007                         my $hash_parent_short = $hash_parent;
5008                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5009                                 $hash_parent_short = substr($hash_parent, 0, 7);
5010                         }
5011                         $formats_nav .=
5012                                 ' (from';
5013                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5014                                 if ($co{'parents'}[$i] eq $hash_parent) {
5015                                         $formats_nav .= ' parent ' . ($i+1);
5016                                         last;
5017                                 }
5018                         }
5019                         $formats_nav .= ': ' .
5020                                 $cgi->a({-href => href(action=>"commitdiff",
5021                                                        hash=>$hash_parent)},
5022                                         esc_html($hash_parent_short)) .
5023                                 ')';
5024                 } elsif (!$co{'parent'}) {
5025                         # --root commitdiff
5026                         $formats_nav .= ' (initial)';
5027                 } elsif (scalar @{$co{'parents'}} == 1) {
5028                         # single parent commit
5029                         $formats_nav .=
5030                                 ' (parent: ' .
5031                                 $cgi->a({-href => href(action=>"commitdiff",
5032                                                        hash=>$co{'parent'})},
5033                                         esc_html(substr($co{'parent'}, 0, 7))) .
5034                                 ')';
5035                 } else {
5036                         # merge commit
5037                         if ($hash_parent eq '--cc') {
5038                                 $formats_nav .= ' | ' .
5039                                         $cgi->a({-href => href(action=>"commitdiff",
5040                                                                hash=>$hash, hash_parent=>'-c')},
5041                                                 'combined');
5042                         } else { # $hash_parent eq '-c'
5043                                 $formats_nav .= ' | ' .
5044                                         $cgi->a({-href => href(action=>"commitdiff",
5045                                                                hash=>$hash, hash_parent=>'--cc')},
5046                                                 'compact');
5047                         }
5048                         $formats_nav .=
5049                                 ' (merge: ' .
5050                                 join(' ', map {
5051                                         $cgi->a({-href => href(action=>"commitdiff",
5052                                                                hash=>$_)},
5053                                                 esc_html(substr($_, 0, 7)));
5054                                 } @{$co{'parents'}} ) .
5055                                 ')';
5056                 }
5057         }
5058
5059         my $hash_parent_param = $hash_parent;
5060         if (!defined $hash_parent_param) {
5061                 # --cc for multiple parents, --root for parentless
5062                 $hash_parent_param =
5063                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5064         }
5065
5066         # read commitdiff
5067         my $fd;
5068         my @difftree;
5069         if ($format eq 'html') {
5070                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5071                         "--no-commit-id", "--patch-with-raw", "--full-index",
5072                         $hash_parent_param, $hash, "--"
5073                         or die_error(undef, "Open git-diff-tree failed");
5074
5075                 while (my $line = <$fd>) {
5076                         chomp $line;
5077                         # empty line ends raw part of diff-tree output
5078                         last unless $line;
5079                         push @difftree, scalar parse_difftree_raw_line($line);
5080                 }
5081
5082         } elsif ($format eq 'plain') {
5083                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5084                         '-p', $hash_parent_param, $hash, "--"
5085                         or die_error(undef, "Open git-diff-tree failed");
5086
5087         } else {
5088                 die_error(undef, "Unknown commitdiff format");
5089         }
5090
5091         # non-textual hash id's can be cached
5092         my $expires;
5093         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5094                 $expires = "+1d";
5095         }
5096
5097         # write commit message
5098         if ($format eq 'html') {
5099                 my $refs = git_get_references();
5100                 my $ref = format_ref_marker($refs, $co{'id'});
5101
5102                 git_header_html(undef, $expires);
5103                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5104                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5105                 git_print_authorship(\%co);
5106                 print "<div class=\"page_body\">\n";
5107                 if (@{$co{'comment'}} > 1) {
5108                         print "<div class=\"log\">\n";
5109                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5110                         print "</div>\n"; # class="log"
5111                 }
5112
5113         } elsif ($format eq 'plain') {
5114                 my $refs = git_get_references("tags");
5115                 my $tagname = git_get_rev_name_tags($hash);
5116                 my $filename = basename($project) . "-$hash.patch";
5117
5118                 print $cgi->header(
5119                         -type => 'text/plain',
5120                         -charset => 'utf-8',
5121                         -expires => $expires,
5122                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5123                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5124                 print "From: " . to_utf8($co{'author'}) . "\n";
5125                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5126                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5127
5128                 print "X-Git-Tag: $tagname\n" if $tagname;
5129                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5130
5131                 foreach my $line (@{$co{'comment'}}) {
5132                         print to_utf8($line) . "\n";
5133                 }
5134                 print "---\n\n";
5135         }
5136
5137         # write patch
5138         if ($format eq 'html') {
5139                 my $use_parents = !defined $hash_parent ||
5140                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5141                 git_difftree_body(\@difftree, $hash,
5142                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5143                 print "<br/>\n";
5144
5145                 git_patchset_body($fd, \@difftree, $hash,
5146                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5147                 close $fd;
5148                 print "</div>\n"; # class="page_body"
5149                 git_footer_html();
5150
5151         } elsif ($format eq 'plain') {
5152                 local $/ = undef;
5153                 print <$fd>;
5154                 close $fd
5155                         or print "Reading git-diff-tree failed\n";
5156         }
5157 }
5158
5159 sub git_commitdiff_plain {
5160         git_commitdiff('plain');
5161 }
5162
5163 sub git_history {
5164         if (!defined $hash_base) {
5165                 $hash_base = git_get_head_hash($project);
5166         }
5167         if (!defined $page) {
5168                 $page = 0;
5169         }
5170         my $ftype;
5171         my %co = parse_commit($hash_base);
5172         if (!%co) {
5173                 die_error(undef, "Unknown commit object");
5174         }
5175
5176         my $refs = git_get_references();
5177         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5178
5179         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5180                                        $file_name, "--full-history");
5181         if (!@commitlist) {
5182                 die_error('404 Not Found', "No such file or directory on given branch");
5183         }
5184
5185         if (!defined $hash && defined $file_name) {
5186                 # some commits could have deleted file in question,
5187                 # and not have it in tree, but one of them has to have it
5188                 for (my $i = 0; $i <= @commitlist; $i++) {
5189                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5190                         last if defined $hash;
5191                 }
5192         }
5193         if (defined $hash) {
5194                 $ftype = git_get_type($hash);
5195         }
5196         if (!defined $ftype) {
5197                 die_error(undef, "Unknown type of object");
5198         }
5199
5200         my $paging_nav = '';
5201         if ($page > 0) {
5202                 $paging_nav .=
5203                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5204                                                file_name=>$file_name)},
5205                                 "first");
5206                 $paging_nav .= " &sdot; " .
5207                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5208                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5209         } else {
5210                 $paging_nav .= "first";
5211                 $paging_nav .= " &sdot; prev";
5212         }
5213         my $next_link = '';
5214         if ($#commitlist >= 100) {
5215                 $next_link =
5216                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5217                                  -accesskey => "n", -title => "Alt-n"}, "next");
5218                 $paging_nav .= " &sdot; $next_link";
5219         } else {
5220                 $paging_nav .= " &sdot; next";
5221         }
5222
5223         git_header_html();
5224         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5225         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5226         git_print_page_path($file_name, $ftype, $hash_base);
5227
5228         git_history_body(\@commitlist, 0, 99,
5229                          $refs, $hash_base, $ftype, $next_link);
5230
5231         git_footer_html();
5232 }
5233
5234 sub git_search {
5235         my ($have_search) = gitweb_check_feature('search');
5236         if (!$have_search) {
5237                 die_error('403 Permission denied', "Permission denied");
5238         }
5239         if (!defined $searchtext) {
5240                 die_error(undef, "Text field empty");
5241         }
5242         if (!defined $hash) {
5243                 $hash = git_get_head_hash($project);
5244         }
5245         my %co = parse_commit($hash);
5246         if (!%co) {
5247                 die_error(undef, "Unknown commit object");
5248         }
5249         if (!defined $page) {
5250                 $page = 0;
5251         }
5252
5253         $searchtype ||= 'commit';
5254         if ($searchtype eq 'pickaxe') {
5255                 # pickaxe may take all resources of your box and run for several minutes
5256                 # with every query - so decide by yourself how public you make this feature
5257                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5258                 if (!$have_pickaxe) {
5259                         die_error('403 Permission denied', "Permission denied");
5260                 }
5261         }
5262         if ($searchtype eq 'grep') {
5263                 my ($have_grep) = gitweb_check_feature('grep');
5264                 if (!$have_grep) {
5265                         die_error('403 Permission denied', "Permission denied");
5266                 }
5267         }
5268
5269         git_header_html();
5270
5271         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5272                 my $greptype;
5273                 if ($searchtype eq 'commit') {
5274                         $greptype = "--grep=";
5275                 } elsif ($searchtype eq 'author') {
5276                         $greptype = "--author=";
5277                 } elsif ($searchtype eq 'committer') {
5278                         $greptype = "--committer=";
5279                 }
5280                 $greptype .= $searchtext;
5281                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5282                                                $greptype, '--regexp-ignore-case',
5283                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5284
5285                 my $paging_nav = '';
5286                 if ($page > 0) {
5287                         $paging_nav .=
5288                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5289                                                        searchtext=>$searchtext,
5290                                                        searchtype=>$searchtype)},
5291                                         "first");
5292                         $paging_nav .= " &sdot; " .
5293                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5294                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5295                 } else {
5296                         $paging_nav .= "first";
5297                         $paging_nav .= " &sdot; prev";
5298                 }
5299                 my $next_link = '';
5300                 if ($#commitlist >= 100) {
5301                         $next_link =
5302                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5303                                          -accesskey => "n", -title => "Alt-n"}, "next");
5304                         $paging_nav .= " &sdot; $next_link";
5305                 } else {
5306                         $paging_nav .= " &sdot; next";
5307                 }
5308
5309                 if ($#commitlist >= 100) {
5310                 }
5311
5312                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5313                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5314                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5315         }
5316
5317         if ($searchtype eq 'pickaxe') {
5318                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5319                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5320
5321                 print "<table class=\"pickaxe search\">\n";
5322                 my $alternate = 1;
5323                 $/ = "\n";
5324                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5325                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5326                         ($search_use_regexp ? '--pickaxe-regex' : ());
5327                 undef %co;
5328                 my @files;
5329                 while (my $line = <$fd>) {
5330                         chomp $line;
5331                         next unless $line;
5332
5333                         my %set = parse_difftree_raw_line($line);
5334                         if (defined $set{'commit'}) {
5335                                 # finish previous commit
5336                                 if (%co) {
5337                                         print "</td>\n" .
5338                                               "<td class=\"link\">" .
5339                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5340                                               " | " .
5341                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5342                                         print "</td>\n" .
5343                                               "</tr>\n";
5344                                 }
5345
5346                                 if ($alternate) {
5347                                         print "<tr class=\"dark\">\n";
5348                                 } else {
5349                                         print "<tr class=\"light\">\n";
5350                                 }
5351                                 $alternate ^= 1;
5352                                 %co = parse_commit($set{'commit'});
5353                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5354                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5355                                       "<td><i>$author</i></td>\n" .
5356                                       "<td>" .
5357                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5358                                               -class => "list subject"},
5359                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5360                         } elsif (defined $set{'to_id'}) {
5361                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5362
5363                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5364                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5365                                               -class => "list"},
5366                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5367                                       "<br/>\n";
5368                         }
5369                 }
5370                 close $fd;
5371
5372                 # finish last commit (warning: repetition!)
5373                 if (%co) {
5374                         print "</td>\n" .
5375                               "<td class=\"link\">" .
5376                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5377                               " | " .
5378                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5379                         print "</td>\n" .
5380                               "</tr>\n";
5381                 }
5382
5383                 print "</table>\n";
5384         }
5385
5386         if ($searchtype eq 'grep') {
5387                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5388                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5389
5390                 print "<table class=\"grep_search\">\n";
5391                 my $alternate = 1;
5392                 my $matches = 0;
5393                 $/ = "\n";
5394                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5395                         $search_use_regexp ? ('-E', '-i') : '-F',
5396                         $searchtext, $co{'tree'};
5397                 my $lastfile = '';
5398                 while (my $line = <$fd>) {
5399                         chomp $line;
5400                         my ($file, $lno, $ltext, $binary);
5401                         last if ($matches++ > 1000);
5402                         if ($line =~ /^Binary file (.+) matches$/) {
5403                                 $file = $1;
5404                                 $binary = 1;
5405                         } else {
5406                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5407                         }
5408                         if ($file ne $lastfile) {
5409                                 $lastfile and print "</td></tr>\n";
5410                                 if ($alternate++) {
5411                                         print "<tr class=\"dark\">\n";
5412                                 } else {
5413                                         print "<tr class=\"light\">\n";
5414                                 }
5415                                 print "<td class=\"list\">".
5416                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5417                                                                file_name=>"$file"),
5418                                                 -class => "list"}, esc_path($file));
5419                                 print "</td><td>\n";
5420                                 $lastfile = $file;
5421                         }
5422                         if ($binary) {
5423                                 print "<div class=\"binary\">Binary file</div>\n";
5424                         } else {
5425                                 $ltext = untabify($ltext);
5426                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5427                                         $ltext = esc_html($1, -nbsp=>1);
5428                                         $ltext .= '<span class="match">';
5429                                         $ltext .= esc_html($2, -nbsp=>1);
5430                                         $ltext .= '</span>';
5431                                         $ltext .= esc_html($3, -nbsp=>1);
5432                                 } else {
5433                                         $ltext = esc_html($ltext, -nbsp=>1);
5434                                 }
5435                                 print "<div class=\"pre\">" .
5436                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5437                                                                file_name=>"$file").'#l'.$lno,
5438                                                 -class => "linenr"}, sprintf('%4i', $lno))
5439                                         . ' ' .  $ltext . "</div>\n";
5440                         }
5441                 }
5442                 if ($lastfile) {
5443                         print "</td></tr>\n";
5444                         if ($matches > 1000) {
5445                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5446                         }
5447                 } else {
5448                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5449                 }
5450                 close $fd;
5451
5452                 print "</table>\n";
5453         }
5454         git_footer_html();
5455 }
5456
5457 sub git_search_help {
5458         git_header_html();
5459         git_print_page_nav('','', $hash,$hash,$hash);
5460         print <<EOT;
5461 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5462 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5463 the pattern entered is recognized as the POSIX extended
5464 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5465 insensitive).</p>
5466 <dl>
5467 <dt><b>commit</b></dt>
5468 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5469 EOT
5470         my ($have_grep) = gitweb_check_feature('grep');
5471         if ($have_grep) {
5472                 print <<EOT;
5473 <dt><b>grep</b></dt>
5474 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5475     a different one) are searched for the given pattern. On large trees, this search can take
5476 a while and put some strain on the server, so please use it with some consideration. Note that
5477 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5478 case-sensitive.</dd>
5479 EOT
5480         }
5481         print <<EOT;
5482 <dt><b>author</b></dt>
5483 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5484 <dt><b>committer</b></dt>
5485 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5486 EOT
5487         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5488         if ($have_pickaxe) {
5489                 print <<EOT;
5490 <dt><b>pickaxe</b></dt>
5491 <dd>All commits that caused the string to appear or disappear from any file (changes that
5492 added, removed or "modified" the string) will be listed. This search can take a while and
5493 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5494 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5495 EOT
5496         }
5497         print "</dl>\n";
5498         git_footer_html();
5499 }
5500
5501 sub git_shortlog {
5502         my $head = git_get_head_hash($project);
5503         if (!defined $hash) {
5504                 $hash = $head;
5505         }
5506         if (!defined $page) {
5507                 $page = 0;
5508         }
5509         my $refs = git_get_references();
5510
5511         my @commitlist = parse_commits($hash, 101, (100 * $page));
5512
5513         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5514         my $next_link = '';
5515         if ($#commitlist >= 100) {
5516                 $next_link =
5517                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5518                                  -accesskey => "n", -title => "Alt-n"}, "next");
5519         }
5520
5521         git_header_html();
5522         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5523         git_print_header_div('summary', $project);
5524
5525         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5526
5527         git_footer_html();
5528 }
5529
5530 ## ......................................................................
5531 ## feeds (RSS, Atom; OPML)
5532
5533 sub git_feed {
5534         my $format = shift || 'atom';
5535         my ($have_blame) = gitweb_check_feature('blame');
5536
5537         # Atom: http://www.atomenabled.org/developers/syndication/
5538         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5539         if ($format ne 'rss' && $format ne 'atom') {
5540                 die_error(undef, "Unknown web feed format");
5541         }
5542
5543         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5544         my $head = $hash || 'HEAD';
5545         my @commitlist = parse_commits($head, 150, 0, $file_name);
5546
5547         my %latest_commit;
5548         my %latest_date;
5549         my $content_type = "application/$format+xml";
5550         if (defined $cgi->http('HTTP_ACCEPT') &&
5551                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5552                 # browser (feed reader) prefers text/xml
5553                 $content_type = 'text/xml';
5554         }
5555         if (defined($commitlist[0])) {
5556                 %latest_commit = %{$commitlist[0]};
5557                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5558                 print $cgi->header(
5559                         -type => $content_type,
5560                         -charset => 'utf-8',
5561                         -last_modified => $latest_date{'rfc2822'});
5562         } else {
5563                 print $cgi->header(
5564                         -type => $content_type,
5565                         -charset => 'utf-8');
5566         }
5567
5568         # Optimization: skip generating the body if client asks only
5569         # for Last-Modified date.
5570         return if ($cgi->request_method() eq 'HEAD');
5571
5572         # header variables
5573         my $title = "$site_name - $project/$action";
5574         my $feed_type = 'log';
5575         if (defined $hash) {
5576                 $title .= " - '$hash'";
5577                 $feed_type = 'branch log';
5578                 if (defined $file_name) {
5579                         $title .= " :: $file_name";
5580                         $feed_type = 'history';
5581                 }
5582         } elsif (defined $file_name) {
5583                 $title .= " - $file_name";
5584                 $feed_type = 'history';
5585         }
5586         $title .= " $feed_type";
5587         my $descr = git_get_project_description($project);
5588         if (defined $descr) {
5589                 $descr = esc_html($descr);
5590         } else {
5591                 $descr = "$project " .
5592                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5593                          " feed";
5594         }
5595         my $owner = git_get_project_owner($project);
5596         $owner = esc_html($owner);
5597
5598         #header
5599         my $alt_url;
5600         if (defined $file_name) {
5601                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5602         } elsif (defined $hash) {
5603                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5604         } else {
5605                 $alt_url = href(-full=>1, action=>"summary");
5606         }
5607         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5608         if ($format eq 'rss') {
5609                 print <<XML;
5610 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5611 <channel>
5612 XML
5613                 print "<title>$title</title>\n" .
5614                       "<link>$alt_url</link>\n" .
5615                       "<description>$descr</description>\n" .
5616                       "<language>en</language>\n";
5617         } elsif ($format eq 'atom') {
5618                 print <<XML;
5619 <feed xmlns="http://www.w3.org/2005/Atom">
5620 XML
5621                 print "<title>$title</title>\n" .
5622                       "<subtitle>$descr</subtitle>\n" .
5623                       '<link rel="alternate" type="text/html" href="' .
5624                       $alt_url . '" />' . "\n" .
5625                       '<link rel="self" type="' . $content_type . '" href="' .
5626                       $cgi->self_url() . '" />' . "\n" .
5627                       "<id>" . href(-full=>1) . "</id>\n" .
5628                       # use project owner for feed author
5629                       "<author><name>$owner</name></author>\n";
5630                 if (defined $favicon) {
5631                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5632                 }
5633                 if (defined $logo_url) {
5634                         # not twice as wide as tall: 72 x 27 pixels
5635                         print "<logo>" . esc_url($logo) . "</logo>\n";
5636                 }
5637                 if (! %latest_date) {
5638                         # dummy date to keep the feed valid until commits trickle in:
5639                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5640                 } else {
5641                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5642                 }
5643         }
5644
5645         # contents
5646         for (my $i = 0; $i <= $#commitlist; $i++) {
5647                 my %co = %{$commitlist[$i]};
5648                 my $commit = $co{'id'};
5649                 # we read 150, we always show 30 and the ones more recent than 48 hours
5650                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5651                         last;
5652                 }
5653                 my %cd = parse_date($co{'author_epoch'});
5654
5655                 # get list of changed files
5656                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5657                         $co{'parent'} || "--root",
5658                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5659                         or next;
5660                 my @difftree = map { chomp; $_ } <$fd>;
5661                 close $fd
5662                         or next;
5663
5664                 # print element (entry, item)
5665                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5666                 if ($format eq 'rss') {
5667                         print "<item>\n" .
5668                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5669                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5670                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5671                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5672                               "<link>$co_url</link>\n" .
5673                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5674                               "<content:encoded>" .
5675                               "<![CDATA[\n";
5676                 } elsif ($format eq 'atom') {
5677                         print "<entry>\n" .
5678                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5679                               "<updated>$cd{'iso-8601'}</updated>\n" .
5680                               "<author>\n" .
5681                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5682                         if ($co{'author_email'}) {
5683                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5684                         }
5685                         print "</author>\n" .
5686                               # use committer for contributor
5687                               "<contributor>\n" .
5688                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5689                         if ($co{'committer_email'}) {
5690                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5691                         }
5692                         print "</contributor>\n" .
5693                               "<published>$cd{'iso-8601'}</published>\n" .
5694                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5695                               "<id>$co_url</id>\n" .
5696                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5697                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5698                 }
5699                 my $comment = $co{'comment'};
5700                 print "<pre>\n";
5701                 foreach my $line (@$comment) {
5702                         $line = esc_html($line);
5703                         print "$line\n";
5704                 }
5705                 print "</pre><ul>\n";
5706                 foreach my $difftree_line (@difftree) {
5707                         my %difftree = parse_difftree_raw_line($difftree_line);
5708                         next if !$difftree{'from_id'};
5709
5710                         my $file = $difftree{'file'} || $difftree{'to_file'};
5711
5712                         print "<li>" .
5713                               "[" .
5714                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5715                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5716                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5717                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5718                                       -title => "diff"}, 'D');
5719                         if ($have_blame) {
5720                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5721                                                              file_name=>$file, hash_base=>$commit),
5722                                               -title => "blame"}, 'B');
5723                         }
5724                         # if this is not a feed of a file history
5725                         if (!defined $file_name || $file_name ne $file) {
5726                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5727                                                              file_name=>$file, hash=>$commit),
5728                                               -title => "history"}, 'H');
5729                         }
5730                         $file = esc_path($file);
5731                         print "] ".
5732                               "$file</li>\n";
5733                 }
5734                 if ($format eq 'rss') {
5735                         print "</ul>]]>\n" .
5736                               "</content:encoded>\n" .
5737                               "</item>\n";
5738                 } elsif ($format eq 'atom') {
5739                         print "</ul>\n</div>\n" .
5740                               "</content>\n" .
5741                               "</entry>\n";
5742                 }
5743         }
5744
5745         # end of feed
5746         if ($format eq 'rss') {
5747                 print "</channel>\n</rss>\n";
5748         }       elsif ($format eq 'atom') {
5749                 print "</feed>\n";
5750         }
5751 }
5752
5753 sub git_rss {
5754         git_feed('rss');
5755 }
5756
5757 sub git_atom {
5758         git_feed('atom');
5759 }
5760
5761 sub git_opml {
5762         my @list = git_get_projects_list();
5763
5764         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5765         print <<XML;
5766 <?xml version="1.0" encoding="utf-8"?>
5767 <opml version="1.0">
5768 <head>
5769   <title>$site_name OPML Export</title>
5770 </head>
5771 <body>
5772 <outline text="git RSS feeds">
5773 XML
5774
5775         foreach my $pr (@list) {
5776                 my %proj = %$pr;
5777                 my $head = git_get_head_hash($proj{'path'});
5778                 if (!defined $head) {
5779                         next;
5780                 }
5781                 $git_dir = "$projectroot/$proj{'path'}";
5782                 my %co = parse_commit($head);
5783                 if (!%co) {
5784                         next;
5785                 }
5786
5787                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5788                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5789                 my $html = "$my_url?p=$proj{'path'};a=summary";
5790                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5791         }
5792         print <<XML;
5793 </outline>
5794 </body>
5795 </opml>
5796 XML
5797 }