gitweb.cgi

   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 = "1.5.6.5";
  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 = "/usr/bin/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "/pub/git";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = 2007;
  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 = $ENV{'SERVER_NAME'} ? "git://" . $ENV{'SERVER_NAME'} : "projects";
  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 $site_name = ""
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "";
  55 # html text to include at home page
  56 our $home_text = "indextext.html";
  57 # filename of html text to include at bottom of each page
  58 our $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 = "git-logo.png";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "git-favicon.png";
  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 = "";
  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 = "";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("");
  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.perl";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "/etc/gitweb.conf";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 378
 379 # version of the core git binary
 380 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(undef, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(undef, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(undef, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(undef, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(undef, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(undef, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(undef, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(undef, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(undef, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(undef, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(undef, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(undef, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(undef, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_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                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 637                 delete $params{'project'};
 638
 639                 # Summary just uses the project path URL
 640                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 641                         delete $params{'action'};
 642                 }
 643         }
 644
 645         # now encode the parameters explicitly
 646         my @result = ();
 647         for (my $i = 0; $i < @mapping; $i += 2) {
 648                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 649                 if (defined $params{$name}) {
 650                         if (ref($params{$name}) eq "ARRAY") {
 651                                 foreach my $par (@{$params{$name}}) {
 652                                         push @result, $symbol . "=" . esc_param($par);
 653                                 }
 654                         } else {
 655                                 push @result, $symbol . "=" . esc_param($params{$name});
 656                         }
 657                 }
 658         }
 659         $href .= "?" . join(';', @result) if scalar @result;
 660
 661         return $href;
 662 }
 663
 664
 665 ## ======================================================================
 666 ## validation, quoting/unquoting and escaping
 667
 668 sub validate_pathname {
 669         my $input = shift || return undef;
 670
 671         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 672         # at the beginning, at the end, and between slashes.
 673         # also this catches doubled slashes
 674         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 675                 return undef;
 676         }
 677         # no null characters
 678         if ($input =~ m!\0!) {
 679                 return undef;
 680         }
 681         return $input;
 682 }
 683
 684 sub validate_refname {
 685         my $input = shift || return undef;
 686
 687         # textual hashes are O.K.
 688         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 689                 return $input;
 690         }
 691         # it must be correct pathname
 692         $input = validate_pathname($input)
 693                 or return undef;
 694         # restrictions on ref name according to git-check-ref-format
 695         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 696                 return undef;
 697         }
 698         return $input;
 699 }
 700
 701 # decode sequences of octets in utf8 into Perl's internal form,
 702 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 703 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 704 sub to_utf8 {
 705         my $str = shift;
 706         if (utf8::valid($str)) {
 707                 utf8::decode($str);
 708                 return $str;
 709         } else {
 710                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 711         }
 712 }
 713
 714 # quote unsafe chars, but keep the slash, even when it's not
 715 # correct, but quoted slashes look too horrible in bookmarks
 716 sub esc_param {
 717         my $str = shift;
 718         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 719         $str =~ s/\+/%2B/g;
 720         $str =~ s/ /\+/g;
 721         return $str;
 722 }
 723
 724 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 725 sub esc_url {
 726         my $str = shift;
 727         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 728         $str =~ s/\+/%2B/g;
 729         $str =~ s/ /\+/g;
 730         return $str;
 731 }
 732
 733 # replace invalid utf8 character with SUBSTITUTION sequence
 734 sub esc_html ($;%) {
 735         my $str = shift;
 736         my %opts = @_;
 737
 738         $str = to_utf8($str);
 739         $str = $cgi->escapeHTML($str);
 740         if ($opts{'-nbsp'}) {
 741                 $str =~ s/ /&nbsp;/g;
 742         }
 743         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 744         return $str;
 745 }
 746
 747 # quote control characters and escape filename to HTML
 748 sub esc_path {
 749         my $str = shift;
 750         my %opts = @_;
 751
 752         $str = to_utf8($str);
 753         $str = $cgi->escapeHTML($str);
 754         if ($opts{'-nbsp'}) {
 755                 $str =~ s/ /&nbsp;/g;
 756         }
 757         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 758         return $str;
 759 }
 760
 761 # Make control characters "printable", using character escape codes (CEC)
 762 sub quot_cec {
 763         my $cntrl = shift;
 764         my %opts = @_;
 765         my %es = ( # character escape codes, aka escape sequences
 766                 "\t" => '\t',   # tab            (HT)
 767                 "\n" => '\n',   # line feed      (LF)
 768                 "\r" => '\r',   # carrige return (CR)
 769                 "\f" => '\f',   # form feed      (FF)
 770                 "\b" => '\b',   # backspace      (BS)
 771                 "\a" => '\a',   # alarm (bell)   (BEL)
 772                 "\e" => '\e',   # escape         (ESC)
 773                 "\013" => '\v', # vertical tab   (VT)
 774                 "\000" => '\0', # nul character  (NUL)
 775         );
 776         my $chr = ( (exists $es{$cntrl})
 777                     ? $es{$cntrl}
 778                     : sprintf('\%03o', ord($cntrl)) );
 779         if ($opts{-nohtml}) {
 780                 return $chr;
 781         } else {
 782                 return "<span class=\"cntrl\">$chr</span>";
 783         }
 784 }
 785
 786 # Alternatively use unicode control pictures codepoints,
 787 # Unicode "printable representation" (PR)
 788 sub quot_upr {
 789         my $cntrl = shift;
 790         my %opts = @_;
 791
 792         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 793         if ($opts{-nohtml}) {
 794                 return $chr;
 795         } else {
 796                 return "<span class=\"cntrl\">$chr</span>";
 797         }
 798 }
 799
 800 # git may return quoted and escaped filenames
 801 sub unquote {
 802         my $str = shift;
 803
 804         sub unq {
 805                 my $seq = shift;
 806                 my %es = ( # character escape codes, aka escape sequences
 807                         't' => "\t",   # tab            (HT, TAB)
 808                         'n' => "\n",   # newline        (NL)
 809                         'r' => "\r",   # return         (CR)
 810                         'f' => "\f",   # form feed      (FF)
 811                         'b' => "\b",   # backspace      (BS)
 812                         'a' => "\a",   # alarm (bell)   (BEL)
 813                         'e' => "\e",   # escape         (ESC)
 814                         'v' => "\013", # vertical tab   (VT)
 815                 );
 816
 817                 if ($seq =~ m/^[0-7]{1,3}$/) {
 818                         # octal char sequence
 819                         return chr(oct($seq));
 820                 } elsif (exists $es{$seq}) {
 821                         # C escape sequence, aka character escape code
 822                         return $es{$seq};
 823                 }
 824                 # quoted ordinary character
 825                 return $seq;
 826         }
 827
 828         if ($str =~ m/^"(.*)"$/) {
 829                 # needs unquoting
 830                 $str = $1;
 831                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 832         }
 833         return $str;
 834 }
 835
 836 # escape tabs (convert tabs to spaces)
 837 sub untabify {
 838         my $line = shift;
 839
 840         while ((my $pos = index($line, "\t")) != -1) {
 841                 if (my $count = (8 - ($pos % 8))) {
 842                         my $spaces = ' ' x $count;
 843                         $line =~ s/\t/$spaces/;
 844                 }
 845         }
 846
 847         return $line;
 848 }
 849
 850 sub project_in_list {
 851         my $project = shift;
 852         my @list = git_get_projects_list();
 853         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 854 }
 855
 856 ## ----------------------------------------------------------------------
 857 ## HTML aware string manipulation
 858
 859 # Try to chop given string on a word boundary between position
 860 # $len and $len+$add_len. If there is no word boundary there,
 861 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 862 # (marking chopped part) would be longer than given string.
 863 sub chop_str {
 864         my $str = shift;
 865         my $len = shift;
 866         my $add_len = shift || 10;
 867         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 868
 869         # Make sure perl knows it is utf8 encoded so we don't
 870         # cut in the middle of a utf8 multibyte char.
 871         $str = to_utf8($str);
 872
 873         # allow only $len chars, but don't cut a word if it would fit in $add_len
 874         # if it doesn't fit, cut it if it's still longer than the dots we would add
 875         # remove chopped character entities entirely
 876
 877         # when chopping in the middle, distribute $len into left and right part
 878         # return early if chopping wouldn't make string shorter
 879         if ($where eq 'center') {
 880                 return $str if ($len + 5 >= length($str)); # filler is length 5
 881                 $len = int($len/2);
 882         } else {
 883                 return $str if ($len + 4 >= length($str)); # filler is length 4
 884         }
 885
 886         # regexps: ending and beginning with word part up to $add_len
 887         my $endre = qr/.{$len}\w{0,$add_len}/;
 888         my $begre = qr/\w{0,$add_len}.{$len}/;
 889
 890         if ($where eq 'left') {
 891                 $str =~ m/^(.*?)($begre)$/;
 892                 my ($lead, $body) = ($1, $2);
 893                 if (length($lead) > 4) {
 894                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 895                         $lead = " ...";
 896                 }
 897                 return "$lead$body";
 898
 899         } elsif ($where eq 'center') {
 900                 $str =~ m/^($endre)(.*)$/;
 901                 my ($left, $str)  = ($1, $2);
 902                 $str =~ m/^(.*?)($begre)$/;
 903                 my ($mid, $right) = ($1, $2);
 904                 if (length($mid) > 5) {
 905                         $left  =~ s/&[^;]*$//;
 906                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 907                         $mid = " ... ";
 908                 }
 909                 return "$left$mid$right";
 910
 911         } else {
 912                 $str =~ m/^($endre)(.*)$/;
 913                 my $body = $1;
 914                 my $tail = $2;
 915                 if (length($tail) > 4) {
 916                         $body =~ s/&[^;]*$//;
 917                         $tail = "... ";
 918                 }
 919                 return "$body$tail";
 920         }
 921 }
 922
 923 # takes the same arguments as chop_str, but also wraps a <span> around the
 924 # result with a title attribute if it does get chopped. Additionally, the
 925 # string is HTML-escaped.
 926 sub chop_and_escape_str {
 927         my ($str) = @_;
 928
 929         my $chopped = chop_str(@_);
 930         if ($chopped eq $str) {
 931                 return esc_html($chopped);
 932         } else {
 933                 $str =~ s/([[:cntrl:]])/?/g;
 934                 return $cgi->span({-title=>$str}, esc_html($chopped));
 935         }
 936 }
 937
 938 ## ----------------------------------------------------------------------
 939 ## functions returning short strings
 940
 941 # CSS class for given age value (in seconds)
 942 sub age_class {
 943         my $age = shift;
 944
 945         if (!defined $age) {
 946                 return "noage";
 947         } elsif ($age < 60*60*2) {
 948                 return "age0";
 949         } elsif ($age < 60*60*24*2) {
 950                 return "age1";
 951         } else {
 952                 return "age2";
 953         }
 954 }
 955
 956 # convert age in seconds to "nn units ago" string
 957 sub age_string {
 958         my $age = shift;
 959         my $age_str;
 960
 961         if ($age > 60*60*24*365*2) {
 962                 $age_str = (int $age/60/60/24/365);
 963                 $age_str .= " years ago";
 964         } elsif ($age > 60*60*24*(365/12)*2) {
 965                 $age_str = int $age/60/60/24/(365/12);
 966                 $age_str .= " months ago";
 967         } elsif ($age > 60*60*24*7*2) {
 968                 $age_str = int $age/60/60/24/7;
 969                 $age_str .= " weeks ago";
 970         } elsif ($age > 60*60*24*2) {
 971                 $age_str = int $age/60/60/24;
 972                 $age_str .= " days ago";
 973         } elsif ($age > 60*60*2) {
 974                 $age_str = int $age/60/60;
 975                 $age_str .= " hours ago";
 976         } elsif ($age > 60*2) {
 977                 $age_str = int $age/60;
 978                 $age_str .= " min ago";
 979         } elsif ($age > 2) {
 980                 $age_str = int $age;
 981                 $age_str .= " sec ago";
 982         } else {
 983                 $age_str .= " right now";
 984         }
 985         return $age_str;
 986 }
 987
 988 use constant {
 989         S_IFINVALID => 0030000,
 990         S_IFGITLINK => 0160000,
 991 };
 992
 993 # submodule/subproject, a commit object reference
 994 sub S_ISGITLINK($) {
 995         my $mode = shift;
 996
 997         return (($mode & S_IFMT) == S_IFGITLINK)
 998 }
 999
1000 # convert file mode in octal to symbolic file mode string
1001 sub mode_str {
1002         my $mode = oct shift;
1003
1004         if (S_ISGITLINK($mode)) {
1005                 return 'm---------';
1006         } elsif (S_ISDIR($mode & S_IFMT)) {
1007                 return 'drwxr-xr-x';
1008         } elsif (S_ISLNK($mode)) {
1009                 return 'lrwxrwxrwx';
1010         } elsif (S_ISREG($mode)) {
1011                 # git cares only about the executable bit
1012                 if ($mode & S_IXUSR) {
1013                         return '-rwxr-xr-x';
1014                 } else {
1015                         return '-rw-r--r--';
1016                 };
1017         } else {
1018                 return '----------';
1019         }
1020 }
1021
1022 # convert file mode in octal to file type string
1023 sub file_type {
1024         my $mode = shift;
1025
1026         if ($mode !~ m/^[0-7]+$/) {
1027                 return $mode;
1028         } else {
1029                 $mode = oct $mode;
1030         }
1031
1032         if (S_ISGITLINK($mode)) {
1033                 return "submodule";
1034         } elsif (S_ISDIR($mode & S_IFMT)) {
1035                 return "directory";
1036         } elsif (S_ISLNK($mode)) {
1037                 return "symlink";
1038         } elsif (S_ISREG($mode)) {
1039                 return "file";
1040         } else {
1041                 return "unknown";
1042         }
1043 }
1044
1045 # convert file mode in octal to file type description string
1046 sub file_type_long {
1047         my $mode = shift;
1048
1049         if ($mode !~ m/^[0-7]+$/) {
1050                 return $mode;
1051         } else {
1052                 $mode = oct $mode;
1053         }
1054
1055         if (S_ISGITLINK($mode)) {
1056                 return "submodule";
1057         } elsif (S_ISDIR($mode & S_IFMT)) {
1058                 return "directory";
1059         } elsif (S_ISLNK($mode)) {
1060                 return "symlink";
1061         } elsif (S_ISREG($mode)) {
1062                 if ($mode & S_IXUSR) {
1063                         return "executable";
1064                 } else {
1065                         return "file";
1066                 };
1067         } else {
1068                 return "unknown";
1069         }
1070 }
1071
1072
1073 ## ----------------------------------------------------------------------
1074 ## functions returning short HTML fragments, or transforming HTML fragments
1075 ## which don't belong to other sections
1076
1077 # format line of commit message.
1078 sub format_log_line_html {
1079         my $line = shift;
1080
1081         $line = esc_html($line, -nbsp=>1);
1082         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1083                 my $hash_text = $1;
1084                 my $link =
1085                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1086                                 -class => "text"}, $hash_text);
1087                 $line =~ s/$hash_text/$link/;
1088         }
1089         return $line;
1090 }
1091
1092 # format marker of refs pointing to given object
1093 sub format_ref_marker {
1094         my ($refs, $id) = @_;
1095         my $markers = '';
1096
1097         if (defined $refs->{$id}) {
1098                 foreach my $ref (@{$refs->{$id}}) {
1099                         my ($type, $name) = qw();
1100                         # e.g. tags/v2.6.11 or heads/next
1101                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1102                                 $type = $1;
1103                                 $name = $2;
1104                         } else {
1105                                 $type = "ref";
1106                                 $name = $ref;
1107                         }
1108
1109                         $markers .= " <span class=\"$type\" title=\"$ref\">" .
1110                                     esc_html($name) . "</span>";
1111                 }
1112         }
1113
1114         if ($markers) {
1115                 return ' <span class="refs">'. $markers . '</span>';
1116         } else {
1117                 return "";
1118         }
1119 }
1120
1121 # format, perhaps shortened and with markers, title line
1122 sub format_subject_html {
1123         my ($long, $short, $href, $extra) = @_;
1124         $extra = '' unless defined($extra);
1125
1126         if (length($short) < length($long)) {
1127                 return $cgi->a({-href => $href, -class => "list subject",
1128                                 -title => to_utf8($long)},
1129                        esc_html($short) . $extra);
1130         } else {
1131                 return $cgi->a({-href => $href, -class => "list subject"},
1132                        esc_html($long)  . $extra);
1133         }
1134 }
1135
1136 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1137 sub format_git_diff_header_line {
1138         my $line = shift;
1139         my $diffinfo = shift;
1140         my ($from, $to) = @_;
1141
1142         if ($diffinfo->{'nparents'}) {
1143                 # combined diff
1144                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1145                 if ($to->{'href'}) {
1146                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1147                                          esc_path($to->{'file'}));
1148                 } else { # file was deleted (no href)
1149                         $line .= esc_path($to->{'file'});
1150                 }
1151         } else {
1152                 # "ordinary" diff
1153                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1154                 if ($from->{'href'}) {
1155                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1156                                          'a/' . esc_path($from->{'file'}));
1157                 } else { # file was added (no href)
1158                         $line .= 'a/' . esc_path($from->{'file'});
1159                 }
1160                 $line .= ' ';
1161                 if ($to->{'href'}) {
1162                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1163                                          'b/' . esc_path($to->{'file'}));
1164                 } else { # file was deleted
1165                         $line .= 'b/' . esc_path($to->{'file'});
1166                 }
1167         }
1168
1169         return "<div class=\"diff header\">$line</div>\n";
1170 }
1171
1172 # format extended diff header line, before patch itself
1173 sub format_extended_diff_header_line {
1174         my $line = shift;
1175         my $diffinfo = shift;
1176         my ($from, $to) = @_;
1177
1178         # match <path>
1179         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1180                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1181                                        esc_path($from->{'file'}));
1182         }
1183         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1184                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1185                                  esc_path($to->{'file'}));
1186         }
1187         # match single <mode>
1188         if ($line =~ m/\s(\d{6})$/) {
1189                 $line .= '<span class="info"> (' .
1190                          file_type_long($1) .
1191                          ')</span>';
1192         }
1193         # match <hash>
1194         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1195                 # can match only for combined diff
1196                 $line = 'index ';
1197                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1198                         if ($from->{'href'}[$i]) {
1199                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1200                                                   -class=>"hash"},
1201                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1202                         } else {
1203                                 $line .= '0' x 7;
1204                         }
1205                         # separator
1206                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1207                 }
1208                 $line .= '..';
1209                 if ($to->{'href'}) {
1210                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1211                                          substr($diffinfo->{'to_id'},0,7));
1212                 } else {
1213                         $line .= '0' x 7;
1214                 }
1215
1216         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1217                 # can match only for ordinary diff
1218                 my ($from_link, $to_link);
1219                 if ($from->{'href'}) {
1220                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1221                                              substr($diffinfo->{'from_id'},0,7));
1222                 } else {
1223                         $from_link = '0' x 7;
1224                 }
1225                 if ($to->{'href'}) {
1226                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1227                                            substr($diffinfo->{'to_id'},0,7));
1228                 } else {
1229                         $to_link = '0' x 7;
1230                 }
1231                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1232                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1233         }
1234
1235         return $line . "<br/>\n";
1236 }
1237
1238 # format from-file/to-file diff header
1239 sub format_diff_from_to_header {
1240         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1241         my $line;
1242         my $result = '';
1243
1244         $line = $from_line;
1245         #assert($line =~ m/^---/) if DEBUG;
1246         # no extra formatting for "^--- /dev/null"
1247         if (! $diffinfo->{'nparents'}) {
1248                 # ordinary (single parent) diff
1249                 if ($line =~ m!^--- "?a/!) {
1250                         if ($from->{'href'}) {
1251                                 $line = '--- a/' .
1252                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1253                                                 esc_path($from->{'file'}));
1254                         } else {
1255                                 $line = '--- a/' .
1256                                         esc_path($from->{'file'});
1257                         }
1258                 }
1259                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1260
1261         } else {
1262                 # combined diff (merge commit)
1263                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1264                         if ($from->{'href'}[$i]) {
1265                                 $line = '--- ' .
1266                                         $cgi->a({-href=>href(action=>"blobdiff",
1267                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1268                                                              hash_parent_base=>$parents[$i],
1269                                                              file_parent=>$from->{'file'}[$i],
1270                                                              hash=>$diffinfo->{'to_id'},
1271                                                              hash_base=>$hash,
1272                                                              file_name=>$to->{'file'}),
1273                                                  -class=>"path",
1274                                                  -title=>"diff" . ($i+1)},
1275                                                 $i+1) .
1276                                         '/' .
1277                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1278                                                 esc_path($from->{'file'}[$i]));
1279                         } else {
1280                                 $line = '--- /dev/null';
1281                         }
1282                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1283                 }
1284         }
1285
1286         $line = $to_line;
1287         #assert($line =~ m/^\+\+\+/) if DEBUG;
1288         # no extra formatting for "^+++ /dev/null"
1289         if ($line =~ m!^\+\+\+ "?b/!) {
1290                 if ($to->{'href'}) {
1291                         $line = '+++ b/' .
1292                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1293                                         esc_path($to->{'file'}));
1294                 } else {
1295                         $line = '+++ b/' .
1296                                 esc_path($to->{'file'});
1297                 }
1298         }
1299         $result .= qq!<div class="diff to_file">$line</div>\n!;
1300
1301         return $result;
1302 }
1303
1304 # create note for patch simplified by combined diff
1305 sub format_diff_cc_simplified {
1306         my ($diffinfo, @parents) = @_;
1307         my $result = '';
1308
1309         $result .= "<div class=\"diff header\">" .
1310                    "diff --cc ";
1311         if (!is_deleted($diffinfo)) {
1312                 $result .= $cgi->a({-href => href(action=>"blob",
1313                                                   hash_base=>$hash,
1314                                                   hash=>$diffinfo->{'to_id'},
1315                                                   file_name=>$diffinfo->{'to_file'}),
1316                                     -class => "path"},
1317                                    esc_path($diffinfo->{'to_file'}));
1318         } else {
1319                 $result .= esc_path($diffinfo->{'to_file'});
1320         }
1321         $result .= "</div>\n" . # class="diff header"
1322                    "<div class=\"diff nodifferences\">" .
1323                    "Simple merge" .
1324                    "</div>\n"; # class="diff nodifferences"
1325
1326         return $result;
1327 }
1328
1329 # format patch (diff) line (not to be used for diff headers)
1330 sub format_diff_line {
1331         my $line = shift;
1332         my ($from, $to) = @_;
1333         my $diff_class = "";
1334
1335         chomp $line;
1336
1337         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1338                 # combined diff
1339                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1340                 if ($line =~ m/^\@{3}/) {
1341                         $diff_class = " chunk_header";
1342                 } elsif ($line =~ m/^\\/) {
1343                         $diff_class = " incomplete";
1344                 } elsif ($prefix =~ tr/+/+/) {
1345                         $diff_class = " add";
1346                 } elsif ($prefix =~ tr/-/-/) {
1347                         $diff_class = " rem";
1348                 }
1349         } else {
1350                 # assume ordinary diff
1351                 my $char = substr($line, 0, 1);
1352                 if ($char eq '+') {
1353                         $diff_class = " add";
1354                 } elsif ($char eq '-') {
1355                         $diff_class = " rem";
1356                 } elsif ($char eq '@') {
1357                         $diff_class = " chunk_header";
1358                 } elsif ($char eq "\\") {
1359                         $diff_class = " incomplete";
1360                 }
1361         }
1362         $line = untabify($line);
1363         if ($from && $to && $line =~ m/^\@{2} /) {
1364                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1365                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1366
1367                 $from_lines = 0 unless defined $from_lines;
1368                 $to_lines   = 0 unless defined $to_lines;
1369
1370                 if ($from->{'href'}) {
1371                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1372                                              -class=>"list"}, $from_text);
1373                 }
1374                 if ($to->{'href'}) {
1375                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1376                                              -class=>"list"}, $to_text);
1377                 }
1378                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1379                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1380                 return "<div class=\"diff$diff_class\">$line</div>\n";
1381         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1382                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1383                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1384
1385                 @from_text = split(' ', $ranges);
1386                 for (my $i = 0; $i < @from_text; ++$i) {
1387                         ($from_start[$i], $from_nlines[$i]) =
1388                                 (split(',', substr($from_text[$i], 1)), 0);
1389                 }
1390
1391                 $to_text   = pop @from_text;
1392                 $to_start  = pop @from_start;
1393                 $to_nlines = pop @from_nlines;
1394
1395                 $line = "<span class=\"chunk_info\">$prefix ";
1396                 for (my $i = 0; $i < @from_text; ++$i) {
1397                         if ($from->{'href'}[$i]) {
1398                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1399                                                   -class=>"list"}, $from_text[$i]);
1400                         } else {
1401                                 $line .= $from_text[$i];
1402                         }
1403                         $line .= " ";
1404                 }
1405                 if ($to->{'href'}) {
1406                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1407                                           -class=>"list"}, $to_text);
1408                 } else {
1409                         $line .= $to_text;
1410                 }
1411                 $line .= " $prefix</span>" .
1412                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1413                 return "<div class=\"diff$diff_class\">$line</div>\n";
1414         }
1415         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1416 }
1417
1418 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1419 # linked.  Pass the hash of the tree/commit to snapshot.
1420 sub format_snapshot_links {
1421         my ($hash) = @_;
1422         my @snapshot_fmts = gitweb_check_feature('snapshot');
1423         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1424         my $num_fmts = @snapshot_fmts;
1425         if ($num_fmts > 1) {
1426                 # A parenthesized list of links bearing format names.
1427                 # e.g. "snapshot (_tar.gz_ _zip_)"
1428                 return "snapshot (" . join(' ', map
1429                         $cgi->a({
1430                                 -href => href(
1431                                         action=>"snapshot",
1432                                         hash=>$hash,
1433                                         snapshot_format=>$_
1434                                 )
1435                         }, $known_snapshot_formats{$_}{'display'})
1436                 , @snapshot_fmts) . ")";
1437         } elsif ($num_fmts == 1) {
1438                 # A single "snapshot" link whose tooltip bears the format name.
1439                 # i.e. "_snapshot_"
1440                 my ($fmt) = @snapshot_fmts;
1441                 return
1442                         $cgi->a({
1443                                 -href => href(
1444                                         action=>"snapshot",
1445                                         hash=>$hash,
1446                                         snapshot_format=>$fmt
1447                                 ),
1448                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1449                         }, "snapshot");
1450         } else { # $num_fmts == 0
1451                 return undef;
1452         }
1453 }
1454
1455 ## ......................................................................
1456 ## functions returning values to be passed, perhaps after some
1457 ## transformation, to other functions; e.g. returning arguments to href()
1458
1459 # returns hash to be passed to href to generate gitweb URL
1460 # in -title key it returns description of link
1461 sub get_feed_info {
1462         my $format = shift || 'Atom';
1463         my %res = (action => lc($format));
1464
1465         # feed links are possible only for project views
1466         return unless (defined $project);
1467         # some views should link to OPML, or to generic project feed,
1468         # or don't have specific feed yet (so they should use generic)
1469         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1470
1471         my $branch;
1472         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1473         # from tag links; this also makes possible to detect branch links
1474         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1475             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1476                 $branch = $1;
1477         }
1478         # find log type for feed description (title)
1479         my $type = 'log';
1480         if (defined $file_name) {
1481                 $type  = "history of $file_name";
1482                 $type .= "/" if ($action eq 'tree');
1483                 $type .= " on '$branch'" if (defined $branch);
1484         } else {
1485                 $type = "log of $branch" if (defined $branch);
1486         }
1487
1488         $res{-title} = $type;
1489         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1490         $res{'file_name'} = $file_name;
1491
1492         return %res;
1493 }
1494
1495 ## ----------------------------------------------------------------------
1496 ## git utility subroutines, invoking git commands
1497
1498 # returns path to the core git executable and the --git-dir parameter as list
1499 sub git_cmd {
1500         return $GIT, '--git-dir='.$git_dir;
1501 }
1502
1503 # quote the given arguments for passing them to the shell
1504 # quote_command("command", "arg 1", "arg with ' and ! characters")
1505 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1506 # Try to avoid using this function wherever possible.
1507 sub quote_command {
1508         return join(' ',
1509                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1510 }
1511
1512 # get HEAD ref of given project as hash
1513 sub git_get_head_hash {
1514         my $project = shift;
1515         my $o_git_dir = $git_dir;
1516         my $retval = undef;
1517         $git_dir = "$projectroot/$project";
1518         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1519                 my $head = <$fd>;
1520                 close $fd;
1521                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1522                         $retval = $1;
1523                 }
1524         }
1525         if (defined $o_git_dir) {
1526                 $git_dir = $o_git_dir;
1527         }
1528         return $retval;
1529 }
1530
1531 # get type of given object
1532 sub git_get_type {
1533         my $hash = shift;
1534
1535         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1536         my $type = <$fd>;
1537         close $fd or return;
1538         chomp $type;
1539         return $type;
1540 }
1541
1542 # repository configuration
1543 our $config_file = '';
1544 our %config;
1545
1546 # store multiple values for single key as anonymous array reference
1547 # single values stored directly in the hash, not as [ <value> ]
1548 sub hash_set_multi {
1549         my ($hash, $key, $value) = @_;
1550
1551         if (!exists $hash->{$key}) {
1552                 $hash->{$key} = $value;
1553         } elsif (!ref $hash->{$key}) {
1554                 $hash->{$key} = [ $hash->{$key}, $value ];
1555         } else {
1556                 push @{$hash->{$key}}, $value;
1557         }
1558 }
1559
1560 # return hash of git project configuration
1561 # optionally limited to some section, e.g. 'gitweb'
1562 sub git_parse_project_config {
1563         my $section_regexp = shift;
1564         my %config;
1565
1566         local $/ = "\0";
1567
1568         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1569                 or return;
1570
1571         while (my $keyval = <$fh>) {
1572                 chomp $keyval;
1573                 my ($key, $value) = split(/\n/, $keyval, 2);
1574
1575                 hash_set_multi(\%config, $key, $value)
1576                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1577         }
1578         close $fh;
1579
1580         return %config;
1581 }
1582
1583 # convert config value to boolean, 'true' or 'false'
1584 # no value, number > 0, 'true' and 'yes' values are true
1585 # rest of values are treated as false (never as error)
1586 sub config_to_bool {
1587         my $val = shift;
1588
1589         # strip leading and trailing whitespace
1590         $val =~ s/^\s+//;
1591         $val =~ s/\s+$//;
1592
1593         return (!defined $val ||               # section.key
1594                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1595                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1596 }
1597
1598 # convert config value to simple decimal number
1599 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1600 # to be multiplied by 1024, 1048576, or 1073741824
1601 sub config_to_int {
1602         my $val = shift;
1603
1604         # strip leading and trailing whitespace
1605         $val =~ s/^\s+//;
1606         $val =~ s/\s+$//;
1607
1608         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1609                 $unit = lc($unit);
1610                 # unknown unit is treated as 1
1611                 return $num * ($unit eq 'g' ? 1073741824 :
1612                                $unit eq 'm' ?    1048576 :
1613                                $unit eq 'k' ?       1024 : 1);
1614         }
1615         return $val;
1616 }
1617
1618 # convert config value to array reference, if needed
1619 sub config_to_multi {
1620         my $val = shift;
1621
1622         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1623 }
1624
1625 sub git_get_project_config {
1626         my ($key, $type) = @_;
1627
1628         # key sanity check
1629         return unless ($key);
1630         $key =~ s/^gitweb\.//;
1631         return if ($key =~ m/\W/);
1632
1633         # type sanity check
1634         if (defined $type) {
1635                 $type =~ s/^--//;
1636                 $type = undef
1637                         unless ($type eq 'bool' || $type eq 'int');
1638         }
1639
1640         # get config
1641         if (!defined $config_file ||
1642             $config_file ne "$git_dir/config") {
1643                 %config = git_parse_project_config('gitweb');
1644                 $config_file = "$git_dir/config";
1645         }
1646
1647         # ensure given type
1648         if (!defined $type) {
1649                 return $config{"gitweb.$key"};
1650         } elsif ($type eq 'bool') {
1651                 # backward compatibility: 'git config --bool' returns true/false
1652                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1653         } elsif ($type eq 'int') {
1654                 return config_to_int($config{"gitweb.$key"});
1655         }
1656         return $config{"gitweb.$key"};
1657 }
1658
1659 # get hash of given path at given ref
1660 sub git_get_hash_by_path {
1661         my $base = shift;
1662         my $path = shift || return undef;
1663         my $type = shift;
1664
1665         $path =~ s,/+$,,;
1666
1667         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1668                 or die_error(undef, "Open git-ls-tree failed");
1669         my $line = <$fd>;
1670         close $fd or return undef;
1671
1672         if (!defined $line) {
1673                 # there is no tree or hash given by $path at $base
1674                 return undef;
1675         }
1676
1677         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1678         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1679         if (defined $type && $type ne $2) {
1680                 # type doesn't match
1681                 return undef;
1682         }
1683         return $3;
1684 }
1685
1686 # get path of entry with given hash at given tree-ish (ref)
1687 # used to get 'from' filename for combined diff (merge commit) for renames
1688 sub git_get_path_by_hash {
1689         my $base = shift || return;
1690         my $hash = shift || return;
1691
1692         local $/ = "\0";
1693
1694         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1695                 or return undef;
1696         while (my $line = <$fd>) {
1697                 chomp $line;
1698
1699                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1700                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1701                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1702                         close $fd;
1703                         return $1;
1704                 }
1705         }
1706         close $fd;
1707         return undef;
1708 }
1709
1710 ## ......................................................................
1711 ## git utility functions, directly accessing git repository
1712
1713 sub git_get_project_description {
1714         my $path = shift;
1715
1716         $git_dir = "$projectroot/$path";
1717         open my $fd, "$git_dir/description"
1718                 or return git_get_project_config('description');
1719         my $descr = <$fd>;
1720         close $fd;
1721         if (defined $descr) {
1722                 chomp $descr;
1723         }
1724         return $descr;
1725 }
1726
1727 sub git_get_project_url_list {
1728         my $path = shift;
1729
1730         $git_dir = "$projectroot/$path";
1731         open my $fd, "$git_dir/cloneurl"
1732                 or return wantarray ?
1733                 @{ config_to_multi(git_get_project_config('url')) } :
1734                    config_to_multi(git_get_project_config('url'));
1735         my @git_project_url_list = map { chomp; $_ } <$fd>;
1736         close $fd;
1737
1738         return wantarray ? @git_project_url_list : \@git_project_url_list;
1739 }
1740
1741 sub git_get_projects_list {
1742         my ($filter) = @_;
1743         my @list;
1744
1745         $filter ||= '';
1746         $filter =~ s/\.git$//;
1747
1748         my ($check_forks) = gitweb_check_feature('forks');
1749
1750         if (-d $projects_list) {
1751                 # search in directory
1752                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1753                 # remove the trailing "/"
1754                 $dir =~ s!/+$!!;
1755                 my $pfxlen = length("$dir");
1756                 my $pfxdepth = ($dir =~ tr!/!!);
1757
1758                 File::Find::find({
1759                         follow_fast => 1, # follow symbolic links
1760                         follow_skip => 2, # ignore duplicates
1761                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1762                         wanted => sub {
1763                                 # skip project-list toplevel, if we get it.
1764                                 return if (m!^[/.]$!);
1765                                 # only directories can be git repositories
1766                                 return unless (-d $_);
1767                                 # don't traverse too deep (Find is super slow on os x)
1768                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1769                                         $File::Find::prune = 1;
1770                                         return;
1771                                 }
1772
1773                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1774                                 # we check related file in $projectroot
1775                                 if ($check_forks and $subdir =~ m#/.#) {
1776                                         $File::Find::prune = 1;
1777                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1778                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1779                                         $File::Find::prune = 1;
1780                                 }
1781                         },
1782                 }, "$dir");
1783
1784         } elsif (-f $projects_list) {
1785                 # read from file(url-encoded):
1786                 # 'git%2Fgit.git Linus+Torvalds'
1787                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1788                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1789                 my %paths;
1790                 open my ($fd), $projects_list or return;
1791         PROJECT:
1792                 while (my $line = <$fd>) {
1793                         chomp $line;
1794                         my ($path, $owner) = split ' ', $line;
1795                         $path = unescape($path);
1796                         $owner = unescape($owner);
1797                         if (!defined $path) {
1798                                 next;
1799                         }
1800                         if ($filter ne '') {
1801                                 # looking for forks;
1802                                 my $pfx = substr($path, 0, length($filter));
1803                                 if ($pfx ne $filter) {
1804                                         next PROJECT;
1805                                 }
1806                                 my $sfx = substr($path, length($filter));
1807                                 if ($sfx !~ /^\/.*\.git$/) {
1808                                         next PROJECT;
1809                                 }
1810                         } elsif ($check_forks) {
1811                         PATH:
1812                                 foreach my $filter (keys %paths) {
1813                                         # looking for forks;
1814                                         my $pfx = substr($path, 0, length($filter));
1815                                         if ($pfx ne $filter) {
1816                                                 next PATH;
1817                                         }
1818                                         my $sfx = substr($path, length($filter));
1819                                         if ($sfx !~ /^\/.*\.git$/) {
1820                                                 next PATH;
1821                                         }
1822                                         # is a fork, don't include it in
1823                                         # the list
1824                                         next PROJECT;
1825                                 }
1826                         }
1827                         if (check_export_ok("$projectroot/$path")) {
1828                                 my $pr = {
1829                                         path => $path,
1830                                         owner => to_utf8($owner),
1831                                 };
1832                                 push @list, $pr;
1833                                 (my $forks_path = $path) =~ s/\.git$//;
1834                                 $paths{$forks_path}++;
1835                         }
1836                 }
1837                 close $fd;
1838         }
1839         return @list;
1840 }
1841
1842 our $gitweb_project_owner = undef;
1843 sub git_get_project_list_from_file {
1844
1845         return if (defined $gitweb_project_owner);
1846
1847         $gitweb_project_owner = {};
1848         # read from file (url-encoded):
1849         # 'git%2Fgit.git Linus+Torvalds'
1850         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1851         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1852         if (-f $projects_list) {
1853                 open (my $fd , $projects_list);
1854                 while (my $line = <$fd>) {
1855                         chomp $line;
1856                         my ($pr, $ow) = split ' ', $line;
1857                         $pr = unescape($pr);
1858                         $ow = unescape($ow);
1859                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1860                 }
1861                 close $fd;
1862         }
1863 }
1864
1865 sub git_get_project_owner {
1866         my $project = shift;
1867         my $owner;
1868
1869         return undef unless $project;
1870         $git_dir = "$projectroot/$project";
1871
1872         if (!defined $gitweb_project_owner) {
1873                 git_get_project_list_from_file();
1874         }
1875
1876         if (exists $gitweb_project_owner->{$project}) {
1877                 $owner = $gitweb_project_owner->{$project};
1878         }
1879         if (!defined $owner){
1880                 $owner = git_get_project_config('owner');
1881         }
1882         if (!defined $owner) {
1883                 $owner = get_file_owner("$git_dir");
1884         }
1885
1886         return $owner;
1887 }
1888
1889 sub git_get_last_activity {
1890         my ($path) = @_;
1891         my $fd;
1892
1893         $git_dir = "$projectroot/$path";
1894         open($fd, "-|", git_cmd(), 'for-each-ref',
1895              '--format=%(committer)',
1896              '--sort=-committerdate',
1897              '--count=1',
1898              'refs/heads') or return;
1899         my $most_recent = <$fd>;
1900         close $fd or return;
1901         if (defined $most_recent &&
1902             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1903                 my $timestamp = $1;
1904                 my $age = time - $timestamp;
1905                 return ($age, age_string($age));
1906         }
1907         return (undef, undef);
1908 }
1909
1910 sub git_get_references {
1911         my $type = shift || "";
1912         my %refs;
1913         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1914         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1915         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1916                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1917                 or return;
1918
1919         while (my $line = <$fd>) {
1920                 chomp $line;
1921                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1922                         if (defined $refs{$1}) {
1923                                 push @{$refs{$1}}, $2;
1924                         } else {
1925                                 $refs{$1} = [ $2 ];
1926                         }
1927                 }
1928         }
1929         close $fd or return;
1930         return \%refs;
1931 }
1932
1933 sub git_get_rev_name_tags {
1934         my $hash = shift || return undef;
1935
1936         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1937                 or return;
1938         my $name_rev = <$fd>;
1939         close $fd;
1940
1941         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1942                 return $1;
1943         } else {
1944                 # catches also '$hash undefined' output
1945                 return undef;
1946         }
1947 }
1948
1949 ## ----------------------------------------------------------------------
1950 ## parse to hash functions
1951
1952 sub parse_date {
1953         my $epoch = shift;
1954         my $tz = shift || "-0000";
1955
1956         my %date;
1957         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1958         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1959         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1960         $date{'hour'} = $hour;
1961         $date{'minute'} = $min;
1962         $date{'mday'} = $mday;
1963         $date{'day'} = $days[$wday];
1964         $date{'month'} = $months[$mon];
1965         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1966                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1967         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1968                              $mday, $months[$mon], $hour ,$min;
1969         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1970                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1971
1972         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1973         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1974         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1975         $date{'hour_local'} = $hour;
1976         $date{'minute_local'} = $min;
1977         $date{'tz_local'} = $tz;
1978         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1979                                   1900+$year, $mon+1, $mday,
1980                                   $hour, $min, $sec, $tz);
1981         return %date;
1982 }
1983
1984 sub parse_tag {
1985         my $tag_id = shift;
1986         my %tag;
1987         my @comment;
1988
1989         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1990         $tag{'id'} = $tag_id;
1991         while (my $line = <$fd>) {
1992                 chomp $line;
1993                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1994                         $tag{'object'} = $1;
1995                 } elsif ($line =~ m/^type (.+)$/) {
1996                         $tag{'type'} = $1;
1997                 } elsif ($line =~ m/^tag (.+)$/) {
1998                         $tag{'name'} = $1;
1999                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2000                         $tag{'author'} = $1;
2001                         $tag{'epoch'} = $2;
2002                         $tag{'tz'} = $3;
2003                 } elsif ($line =~ m/--BEGIN/) {
2004                         push @comment, $line;
2005                         last;
2006                 } elsif ($line eq "") {
2007                         last;
2008                 }
2009         }
2010         push @comment, <$fd>;
2011         $tag{'comment'} = \@comment;
2012         close $fd or return;
2013         if (!defined $tag{'name'}) {
2014                 return
2015         };
2016         return %tag
2017 }
2018
2019 sub parse_commit_text {
2020         my ($commit_text, $withparents) = @_;
2021         my @commit_lines = split '\n', $commit_text;
2022         my %co;
2023
2024         pop @commit_lines; # Remove '\0'
2025
2026         if (! @commit_lines) {
2027                 return;
2028         }
2029
2030         my $header = shift @commit_lines;
2031         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2032                 return;
2033         }
2034         ($co{'id'}, my @parents) = split ' ', $header;
2035         while (my $line = shift @commit_lines) {
2036                 last if $line eq "\n";
2037                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2038                         $co{'tree'} = $1;
2039                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2040                         push @parents, $1;
2041                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2042                         $co{'author'} = $1;
2043                         $co{'author_epoch'} = $2;
2044                         $co{'author_tz'} = $3;
2045                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2046                                 $co{'author_name'}  = $1;
2047                                 $co{'author_email'} = $2;
2048                         } else {
2049                                 $co{'author_name'} = $co{'author'};
2050                         }
2051                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2052                         $co{'committer'} = $1;
2053                         $co{'committer_epoch'} = $2;
2054                         $co{'committer_tz'} = $3;
2055                         $co{'committer_name'} = $co{'committer'};
2056                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2057                                 $co{'committer_name'}  = $1;
2058                                 $co{'committer_email'} = $2;
2059                         } else {
2060                                 $co{'committer_name'} = $co{'committer'};
2061                         }
2062                 }
2063         }
2064         if (!defined $co{'tree'}) {
2065                 return;
2066         };
2067         $co{'parents'} = \@parents;
2068         $co{'parent'} = $parents[0];
2069
2070         foreach my $title (@commit_lines) {
2071                 $title =~ s/^    //;
2072                 if ($title ne "") {
2073                         $co{'title'} = chop_str($title, 80, 5);
2074                         # remove leading stuff of merges to make the interesting part visible
2075                         if (length($title) > 50) {
2076                                 $title =~ s/^Automatic //;
2077                                 $title =~ s/^merge (of|with) /Merge ... /i;
2078                                 if (length($title) > 50) {
2079                                         $title =~ s/(http|rsync):\/\///;
2080                                 }
2081                                 if (length($title) > 50) {
2082                                         $title =~ s/(master|www|rsync)\.//;
2083                                 }
2084                                 if (length($title) > 50) {
2085                                         $title =~ s/kernel.org:?//;
2086                                 }
2087                                 if (length($title) > 50) {
2088                                         $title =~ s/\/pub\/scm//;
2089                                 }
2090                         }
2091                         $co{'title_short'} = chop_str($title, 50, 5);
2092                         last;
2093                 }
2094         }
2095         if ($co{'title'} eq "") {
2096                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2097         }
2098         # remove added spaces
2099         foreach my $line (@commit_lines) {
2100                 $line =~ s/^    //;
2101         }
2102         $co{'comment'} = \@commit_lines;
2103
2104         my $age = time - $co{'committer_epoch'};
2105         $co{'age'} = $age;
2106         $co{'age_string'} = age_string($age);
2107         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2108         if ($age > 60*60*24*7*2) {
2109                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110                 $co{'age_string_age'} = $co{'age_string'};
2111         } else {
2112                 $co{'age_string_date'} = $co{'age_string'};
2113                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2114         }
2115         return %co;
2116 }
2117
2118 sub parse_commit {
2119         my ($commit_id) = @_;
2120         my %co;
2121
2122         local $/ = "\0";
2123
2124         open my $fd, "-|", git_cmd(), "rev-list",
2125                 "--parents",
2126                 "--header",
2127                 "--max-count=1",
2128                 $commit_id,
2129                 "--",
2130                 or die_error(undef, "Open git-rev-list failed");
2131         %co = parse_commit_text(<$fd>, 1);
2132         close $fd;
2133
2134         return %co;
2135 }
2136
2137 sub parse_commits {
2138         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2139         my @cos;
2140
2141         $maxcount ||= 1;
2142         $skip ||= 0;
2143
2144         local $/ = "\0";
2145
2146         open my $fd, "-|", git_cmd(), "rev-list",
2147                 "--header",
2148                 @args,
2149                 ("--max-count=" . $maxcount),
2150                 ("--skip=" . $skip),
2151                 @extra_options,
2152                 $commit_id,
2153                 "--",
2154                 ($filename ? ($filename) : ())
2155                 or die_error(undef, "Open git-rev-list failed");
2156         while (my $line = <$fd>) {
2157                 my %co = parse_commit_text($line);
2158                 push @cos, \%co;
2159         }
2160         close $fd;
2161
2162         return wantarray ? @cos : \@cos;
2163 }
2164
2165 # parse line of git-diff-tree "raw" output
2166 sub parse_difftree_raw_line {
2167         my $line = shift;
2168         my %res;
2169
2170         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2171         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2172         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2173                 $res{'from_mode'} = $1;
2174                 $res{'to_mode'} = $2;
2175                 $res{'from_id'} = $3;
2176                 $res{'to_id'} = $4;
2177                 $res{'status'} = $5;
2178                 $res{'similarity'} = $6;
2179                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2180                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2181                 } else {
2182                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2183                 }
2184         }
2185         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2186         # combined diff (for merge commit)
2187         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2188                 $res{'nparents'}  = length($1);
2189                 $res{'from_mode'} = [ split(' ', $2) ];
2190                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2191                 $res{'from_id'} = [ split(' ', $3) ];
2192                 $res{'to_id'} = pop @{$res{'from_id'}};
2193                 $res{'status'} = [ split('', $4) ];
2194                 $res{'to_file'} = unquote($5);
2195         }
2196         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2197         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2198                 $res{'commit'} = $1;
2199         }
2200
2201         return wantarray ? %res : \%res;
2202 }
2203
2204 # wrapper: return parsed line of git-diff-tree "raw" output
2205 # (the argument might be raw line, or parsed info)
2206 sub parsed_difftree_line {
2207         my $line_or_ref = shift;
2208
2209         if (ref($line_or_ref) eq "HASH") {
2210                 # pre-parsed (or generated by hand)
2211                 return $line_or_ref;
2212         } else {
2213                 return parse_difftree_raw_line($line_or_ref);
2214         }
2215 }
2216
2217 # parse line of git-ls-tree output
2218 sub parse_ls_tree_line ($;%) {
2219         my $line = shift;
2220         my %opts = @_;
2221         my %res;
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2225
2226         $res{'mode'} = $1;
2227         $res{'type'} = $2;
2228         $res{'hash'} = $3;
2229         if ($opts{'-z'}) {
2230                 $res{'name'} = $4;
2231         } else {
2232                 $res{'name'} = unquote($4);
2233         }
2234
2235         return wantarray ? %res : \%res;
2236 }
2237
2238 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2239 sub parse_from_to_diffinfo {
2240         my ($diffinfo, $from, $to, @parents) = @_;
2241
2242         if ($diffinfo->{'nparents'}) {
2243                 # combined diff
2244                 $from->{'file'} = [];
2245                 $from->{'href'} = [];
2246                 fill_from_file_info($diffinfo, @parents)
2247                         unless exists $diffinfo->{'from_file'};
2248                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2249                         $from->{'file'}[$i] =
2250                                 defined $diffinfo->{'from_file'}[$i] ?
2251                                         $diffinfo->{'from_file'}[$i] :
2252                                         $diffinfo->{'to_file'};
2253                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2254                                 $from->{'href'}[$i] = href(action=>"blob",
2255                                                            hash_base=>$parents[$i],
2256                                                            hash=>$diffinfo->{'from_id'}[$i],
2257                                                            file_name=>$from->{'file'}[$i]);
2258                         } else {
2259                                 $from->{'href'}[$i] = undef;
2260                         }
2261                 }
2262         } else {
2263                 # ordinary (not combined) diff
2264                 $from->{'file'} = $diffinfo->{'from_file'};
2265                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2266                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2267                                                hash=>$diffinfo->{'from_id'},
2268                                                file_name=>$from->{'file'});
2269                 } else {
2270                         delete $from->{'href'};
2271                 }
2272         }
2273
2274         $to->{'file'} = $diffinfo->{'to_file'};
2275         if (!is_deleted($diffinfo)) { # file exists in result
2276                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2277                                      hash=>$diffinfo->{'to_id'},
2278                                      file_name=>$to->{'file'});
2279         } else {
2280                 delete $to->{'href'};
2281         }
2282 }
2283
2284 ## ......................................................................
2285 ## parse to array of hashes functions
2286
2287 sub git_get_heads_list {
2288         my $limit = shift;
2289         my @headslist;
2290
2291         open my $fd, '-|', git_cmd(), 'for-each-ref',
2292                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2293                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2294                 'refs/heads'
2295                 or return;
2296         while (my $line = <$fd>) {
2297                 my %ref_item;
2298
2299                 chomp $line;
2300                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2301                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2302                 my ($committer, $epoch, $tz) =
2303                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2304                 $ref_item{'fullname'}  = $name;
2305                 $name =~ s!^refs/heads/!!;
2306
2307                 $ref_item{'name'}  = $name;
2308                 $ref_item{'id'}    = $hash;
2309                 $ref_item{'title'} = $title || '(no commit message)';
2310                 $ref_item{'epoch'} = $epoch;
2311                 if ($epoch) {
2312                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2313                 } else {
2314                         $ref_item{'age'} = "unknown";
2315                 }
2316
2317                 push @headslist, \%ref_item;
2318         }
2319         close $fd;
2320
2321         return wantarray ? @headslist : \@headslist;
2322 }
2323
2324 sub git_get_tags_list {
2325         my $limit = shift;
2326         my @tagslist;
2327
2328         open my $fd, '-|', git_cmd(), 'for-each-ref',
2329                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2330                 '--format=%(objectname) %(objecttype) %(refname) '.
2331                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2332                 'refs/tags'
2333                 or return;
2334         while (my $line = <$fd>) {
2335                 my %ref_item;
2336
2337                 chomp $line;
2338                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2339                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2340                 my ($creator, $epoch, $tz) =
2341                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2342                 $ref_item{'fullname'} = $name;
2343                 $name =~ s!^refs/tags/!!;
2344
2345                 $ref_item{'type'} = $type;
2346                 $ref_item{'id'} = $id;
2347                 $ref_item{'name'} = $name;
2348                 if ($type eq "tag") {
2349                         $ref_item{'subject'} = $title;
2350                         $ref_item{'reftype'} = $reftype;
2351                         $ref_item{'refid'}   = $refid;
2352                 } else {
2353                         $ref_item{'reftype'} = $type;
2354                         $ref_item{'refid'}   = $id;
2355                 }
2356
2357                 if ($type eq "tag" || $type eq "commit") {
2358                         $ref_item{'epoch'} = $epoch;
2359                         if ($epoch) {
2360                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2361                         } else {
2362                                 $ref_item{'age'} = "unknown";
2363                         }
2364                 }
2365
2366                 push @tagslist, \%ref_item;
2367         }
2368         close $fd;
2369
2370         return wantarray ? @tagslist : \@tagslist;
2371 }
2372
2373 ## ----------------------------------------------------------------------
2374 ## filesystem-related functions
2375
2376 sub get_file_owner {
2377         my $path = shift;
2378
2379         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2380         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2381         if (!defined $gcos) {
2382                 return undef;
2383         }
2384         my $owner = $gcos;
2385         $owner =~ s/[,;].*$//;
2386         return to_utf8($owner);
2387 }
2388
2389 ## ......................................................................
2390 ## mimetype related functions
2391
2392 sub mimetype_guess_file {
2393         my $filename = shift;
2394         my $mimemap = shift;
2395         -r $mimemap or return undef;
2396
2397         my %mimemap;
2398         open(MIME, $mimemap) or return undef;
2399         while (<MIME>) {
2400                 next if m/^#/; # skip comments
2401                 my ($mime, $exts) = split(/\t+/);
2402                 if (defined $exts) {
2403                         my @exts = split(/\s+/, $exts);
2404                         foreach my $ext (@exts) {
2405                                 $mimemap{$ext} = $mime;
2406                         }
2407                 }
2408         }
2409         close(MIME);
2410
2411         $filename =~ /\.([^.]*)$/;
2412         return $mimemap{$1};
2413 }
2414
2415 sub mimetype_guess {
2416         my $filename = shift;
2417         my $mime;
2418         $filename =~ /\./ or return undef;
2419
2420         if ($mimetypes_file) {
2421                 my $file = $mimetypes_file;
2422                 if ($file !~ m!^/!) { # if it is relative path
2423                         # it is relative to project
2424                         $file = "$projectroot/$project/$file";
2425                 }
2426                 $mime = mimetype_guess_file($filename, $file);
2427         }
2428         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2429         return $mime;
2430 }
2431
2432 sub blob_mimetype {
2433         my $fd = shift;
2434         my $filename = shift;
2435
2436         if ($filename) {
2437                 my $mime = mimetype_guess($filename);
2438                 $mime and return $mime;
2439         }
2440
2441         # just in case
2442         return $default_blob_plain_mimetype unless $fd;
2443
2444         if (-T $fd) {
2445                 return 'text/plain';
2446         } elsif (! $filename) {
2447                 return 'application/octet-stream';
2448         } elsif ($filename =~ m/\.png$/i) {
2449                 return 'image/png';
2450         } elsif ($filename =~ m/\.gif$/i) {
2451                 return 'image/gif';
2452         } elsif ($filename =~ m/\.jpe?g$/i) {
2453                 return 'image/jpeg';
2454         } else {
2455                 return 'application/octet-stream';
2456         }
2457 }
2458
2459 sub blob_contenttype {
2460         my ($fd, $file_name, $type) = @_;
2461
2462         $type ||= blob_mimetype($fd, $file_name);
2463         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2464                 $type .= "; charset=$default_text_plain_charset";
2465         }
2466
2467         return $type;
2468 }
2469
2470 ## ======================================================================
2471 ## functions printing HTML: header, footer, error page
2472
2473 sub git_header_html {
2474         my $status = shift || "200 OK";
2475         my $expires = shift;
2476
2477         my $title = "$site_name";
2478         if (defined $project) {
2479                 $title .= " - " . to_utf8($project);
2480                 if (defined $action) {
2481                         $title .= "/$action";
2482                         if (defined $file_name) {
2483                                 $title .= " - " . esc_path($file_name);
2484                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2485                                         $title .= "/";
2486                                 }
2487                         }
2488                 }
2489         }
2490         my $content_type;
2491         # require explicit support from the UA if we are to send the page as
2492         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2493         # we have to do this because MSIE sometimes globs '*/*', pretending to
2494         # support xhtml+xml but choking when it gets what it asked for.
2495         if (defined $cgi->http('HTTP_ACCEPT') &&
2496             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2497             $cgi->Accept('application/xhtml+xml') != 0) {
2498                 $content_type = 'application/xhtml+xml';
2499         } else {
2500                 $content_type = 'text/html';
2501         }
2502         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2503                            -status=> $status, -expires => $expires);
2504         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2505         print <<EOF;
2506 <?xml version="1.0" encoding="utf-8"?>
2507 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2508 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2509 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2510 <!-- git core binaries version $git_version -->
2511 <head>
2512 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2513 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2514 <meta name="robots" content="index, nofollow"/>
2515 <title>$title</title>
2516 EOF
2517 # print out each stylesheet that exist
2518         if (defined $stylesheet) {
2519 #provides backwards capability for those people who define style sheet in a config file
2520                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2521         } else {
2522                 foreach my $stylesheet (@stylesheets) {
2523                         next unless $stylesheet;
2524                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2525                 }
2526         }
2527         if (defined $project) {
2528                 my %href_params = get_feed_info();
2529                 if (!exists $href_params{'-title'}) {
2530                         $href_params{'-title'} = 'log';
2531                 }
2532
2533                 foreach my $format qw(RSS Atom) {
2534                         my $type = lc($format);
2535                         my %link_attr = (
2536                                 '-rel' => 'alternate',
2537                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2538                                 '-type' => "application/$type+xml"
2539                         );
2540
2541                         $href_params{'action'} = $type;
2542                         $link_attr{'-href'} = href(%href_params);
2543                         print "<link ".
2544                               "rel=\"$link_attr{'-rel'}\" ".
2545                               "title=\"$link_attr{'-title'}\" ".
2546                               "href=\"$link_attr{'-href'}\" ".
2547                               "type=\"$link_attr{'-type'}\" ".
2548                               "/>\n";
2549
2550                         $href_params{'extra_options'} = '--no-merges';
2551                         $link_attr{'-href'} = href(%href_params);
2552                         $link_attr{'-title'} .= ' (no merges)';
2553                         print "<link ".
2554                               "rel=\"$link_attr{'-rel'}\" ".
2555                               "title=\"$link_attr{'-title'}\" ".
2556                               "href=\"$link_attr{'-href'}\" ".
2557                               "type=\"$link_attr{'-type'}\" ".
2558                               "/>\n";
2559                 }
2560
2561         } else {
2562                 printf('<link rel="alternate" title="%s projects list" '.
2563                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2564                        $site_name, href(project=>undef, action=>"project_index"));
2565                 printf('<link rel="alternate" title="%s projects feeds" '.
2566                        'href="%s" type="text/x-opml" />'."\n",
2567                        $site_name, href(project=>undef, action=>"opml"));
2568         }
2569         if (defined $favicon) {
2570                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2571         }
2572
2573         print "</head>\n" .
2574               "<body>\n";
2575
2576         if (-f $site_header) {
2577                 open (my $fd, $site_header);
2578                 print <$fd>;
2579                 close $fd;
2580         }
2581
2582         print "<div class=\"page_header\">\n" .
2583               $cgi->a({-href => esc_url($logo_url),
2584                        -title => $logo_label},
2585                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2586         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2587         if (defined $project) {
2588                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2589                 if (defined $action) {
2590                         print " / $action";
2591                 }
2592                 print "\n";
2593         }
2594         print "</div>\n";
2595
2596         my ($have_search) = gitweb_check_feature('search');
2597         if (defined $project && $have_search) {
2598                 if (!defined $searchtext) {
2599                         $searchtext = "";
2600                 }
2601                 my $search_hash;
2602                 if (defined $hash_base) {
2603                         $search_hash = $hash_base;
2604                 } elsif (defined $hash) {
2605                         $search_hash = $hash;
2606                 } else {
2607                         $search_hash = "HEAD";
2608                 }
2609                 my $action = $my_uri;
2610                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2611                 if ($use_pathinfo) {
2612                         $action .= "/".esc_url($project);
2613                 }
2614                 print $cgi->startform(-method => "get", -action => $action) .
2615                       "<div class=\"search\">\n" .
2616                       (!$use_pathinfo &&
2617                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2618                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2619                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2620                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2621                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2622                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2623                       " search:\n",
2624                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2625                       "<span title=\"Extended regular expression\">" .
2626                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2627                                      -checked => $search_use_regexp) .
2628                       "</span>" .
2629                       "</div>" .
2630                       $cgi->end_form() . "\n";
2631         }
2632 }
2633
2634 sub git_footer_html {
2635         my $feed_class = 'rss_logo';
2636
2637         print "<div class=\"page_footer\">\n";
2638         if (defined $project) {
2639                 my $descr = git_get_project_description($project);
2640                 if (defined $descr) {
2641                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2642                 }
2643
2644                 my %href_params = get_feed_info();
2645                 if (!%href_params) {
2646                         $feed_class .= ' generic';
2647                 }
2648                 $href_params{'-title'} ||= 'log';
2649
2650                 foreach my $format qw(RSS Atom) {
2651                         $href_params{'action'} = lc($format);
2652                         print $cgi->a({-href => href(%href_params),
2653                                       -title => "$href_params{'-title'} $format feed",
2654                                       -class => $feed_class}, $format)."\n";
2655                 }
2656
2657         } else {
2658                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2659                               -class => $feed_class}, "OPML") . " ";
2660                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2661                               -class => $feed_class}, "TXT") . "\n";
2662         }
2663         print "</div>\n"; # class="page_footer"
2664
2665         if (-f $site_footer) {
2666                 open (my $fd, $site_footer);
2667                 print <$fd>;
2668                 close $fd;
2669         }
2670
2671         print "</body>\n" .
2672               "</html>";
2673 }
2674
2675 sub die_error {
2676         my $status = shift || "403 Forbidden";
2677         my $error = shift || "Malformed query, file missing or permission denied";
2678
2679         git_header_html($status);
2680         print <<EOF;
2681 <div class="page_body">
2682 <br /><br />
2683 $status - $error
2684 <br />
2685 </div>
2686 EOF
2687         git_footer_html();
2688         exit;
2689 }
2690
2691 ## ----------------------------------------------------------------------
2692 ## functions printing or outputting HTML: navigation
2693
2694 sub git_print_page_nav {
2695         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2696         $extra = '' if !defined $extra; # pager or formats
2697
2698         my @navs = qw(summary shortlog log commit commitdiff tree);
2699         if ($suppress) {
2700                 @navs = grep { $_ ne $suppress } @navs;
2701         }
2702
2703         my %arg = map { $_ => {action=>$_} } @navs;
2704         if (defined $head) {
2705                 for (qw(commit commitdiff)) {
2706                         $arg{$_}{'hash'} = $head;
2707                 }
2708                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2709                         for (qw(shortlog log)) {
2710                                 $arg{$_}{'hash'} = $head;
2711                         }
2712                 }
2713         }
2714         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2715         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2716
2717         print "<div class=\"page_nav\">\n" .
2718                 (join " | ",
2719                  map { $_ eq $current ?
2720                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2721                  } @navs);
2722         print "<br/>\n$extra<br/>\n" .
2723               "</div>\n";
2724 }
2725
2726 sub format_paging_nav {
2727         my ($action, $hash, $head, $page, $has_next_link) = @_;
2728         my $paging_nav;
2729
2730
2731         if ($hash ne $head || $page) {
2732                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2733         } else {
2734                 $paging_nav .= "HEAD";
2735         }
2736
2737         if ($page > 0) {
2738                 $paging_nav .= " &sdot; " .
2739                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2740                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2741         } else {
2742                 $paging_nav .= " &sdot; prev";
2743         }
2744
2745         if ($has_next_link) {
2746                 $paging_nav .= " &sdot; " .
2747                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2748                                  -accesskey => "n", -title => "Alt-n"}, "next");
2749         } else {
2750                 $paging_nav .= " &sdot; next";
2751         }
2752
2753         return $paging_nav;
2754 }
2755
2756 ## ......................................................................
2757 ## functions printing or outputting HTML: div
2758
2759 sub git_print_header_div {
2760         my ($action, $title, $hash, $hash_base) = @_;
2761         my %args = ();
2762
2763         $args{'action'} = $action;
2764         $args{'hash'} = $hash if $hash;
2765         $args{'hash_base'} = $hash_base if $hash_base;
2766
2767         print "<div class=\"header\">\n" .
2768               $cgi->a({-href => href(%args), -class => "title"},
2769               $title ? $title : $action) .
2770               "\n</div>\n";
2771 }
2772
2773 #sub git_print_authorship (\%) {
2774 sub git_print_authorship {
2775         my $co = shift;
2776
2777         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2778         print "<div class=\"author_date\">" .
2779               esc_html($co->{'author_name'}) .
2780               " [$ad{'rfc2822'}";
2781         if ($ad{'hour_local'} < 6) {
2782                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2783                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2784         } else {
2785                 printf(" (%02d:%02d %s)",
2786                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2787         }
2788         print "]</div>\n";
2789 }
2790
2791 sub git_print_page_path {
2792         my $name = shift;
2793         my $type = shift;
2794         my $hb = shift;
2795
2796
2797         print "<div class=\"page_path\">";
2798         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2799                       -title => 'tree root'}, to_utf8("[$project]"));
2800         print " / ";
2801         if (defined $name) {
2802                 my @dirname = split '/', $name;
2803                 my $basename = pop @dirname;
2804                 my $fullname = '';
2805
2806                 foreach my $dir (@dirname) {
2807                         $fullname .= ($fullname ? '/' : '') . $dir;
2808                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2809                                                      hash_base=>$hb),
2810                                       -title => $fullname}, esc_path($dir));
2811                         print " / ";
2812                 }
2813                 if (defined $type && $type eq 'blob') {
2814                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2815                                                      hash_base=>$hb),
2816                                       -title => $name}, esc_path($basename));
2817                 } elsif (defined $type && $type eq 'tree') {
2818                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2819                                                      hash_base=>$hb),
2820                                       -title => $name}, esc_path($basename));
2821                         print " / ";
2822                 } else {
2823                         print esc_path($basename);
2824                 }
2825         }
2826         print "<br/></div>\n";
2827 }
2828
2829 # sub git_print_log (\@;%) {
2830 sub git_print_log ($;%) {
2831         my $log = shift;
2832         my %opts = @_;
2833
2834         if ($opts{'-remove_title'}) {
2835                 # remove title, i.e. first line of log
2836                 shift @$log;
2837         }
2838         # remove leading empty lines
2839         while (defined $log->[0] && $log->[0] eq "") {
2840                 shift @$log;
2841         }
2842
2843         # print log
2844         my $signoff = 0;
2845         my $empty = 0;
2846         foreach my $line (@$log) {
2847                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2848                         $signoff = 1;
2849                         $empty = 0;
2850                         if (! $opts{'-remove_signoff'}) {
2851                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2852                                 next;
2853                         } else {
2854                                 # remove signoff lines
2855                                 next;
2856                         }
2857                 } else {
2858                         $signoff = 0;
2859                 }
2860
2861                 # print only one empty line
2862                 # do not print empty line after signoff
2863                 if ($line eq "") {
2864                         next if ($empty || $signoff);
2865                         $empty = 1;
2866                 } else {
2867                         $empty = 0;
2868                 }
2869
2870                 print format_log_line_html($line) . "<br/>\n";
2871         }
2872
2873         if ($opts{'-final_empty_line'}) {
2874                 # end with single empty line
2875                 print "<br/>\n" unless $empty;
2876         }
2877 }
2878
2879 # return link target (what link points to)
2880 sub git_get_link_target {
2881         my $hash = shift;
2882         my $link_target;
2883
2884         # read link
2885         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2886                 or return;
2887         {
2888                 local $/;
2889                 $link_target = <$fd>;
2890         }
2891         close $fd
2892                 or return;
2893
2894         return $link_target;
2895 }
2896
2897 # given link target, and the directory (basedir) the link is in,
2898 # return target of link relative to top directory (top tree);
2899 # return undef if it is not possible (including absolute links).
2900 sub normalize_link_target {
2901         my ($link_target, $basedir, $hash_base) = @_;
2902
2903         # we can normalize symlink target only if $hash_base is provided
2904         return unless $hash_base;
2905
2906         # absolute symlinks (beginning with '/') cannot be normalized
2907         return if (substr($link_target, 0, 1) eq '/');
2908
2909         # normalize link target to path from top (root) tree (dir)
2910         my $path;
2911         if ($basedir) {
2912                 $path = $basedir . '/' . $link_target;
2913         } else {
2914                 # we are in top (root) tree (dir)
2915                 $path = $link_target;
2916         }
2917
2918         # remove //, /./, and /../
2919         my @path_parts;
2920         foreach my $part (split('/', $path)) {
2921                 # discard '.' and ''
2922                 next if (!$part || $part eq '.');
2923                 # handle '..'
2924                 if ($part eq '..') {
2925                         if (@path_parts) {
2926                                 pop @path_parts;
2927                         } else {
2928                                 # link leads outside repository (outside top dir)
2929                                 return;
2930                         }
2931                 } else {
2932                         push @path_parts, $part;
2933                 }
2934         }
2935         $path = join('/', @path_parts);
2936
2937         return $path;
2938 }
2939
2940 # print tree entry (row of git_tree), but without encompassing <tr> element
2941 sub git_print_tree_entry {
2942         my ($t, $basedir, $hash_base, $have_blame) = @_;
2943
2944         my %base_key = ();
2945         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2946
2947         # The format of a table row is: mode list link.  Where mode is
2948         # the mode of the entry, list is the name of the entry, an href,
2949         # and link is the action links of the entry.
2950
2951         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2952         if ($t->{'type'} eq "blob") {
2953                 print "<td class=\"list\">" .
2954                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2955                                                file_name=>"$basedir$t->{'name'}", %base_key),
2956                                 -class => "list"}, esc_path($t->{'name'}));
2957                 if (S_ISLNK(oct $t->{'mode'})) {
2958                         my $link_target = git_get_link_target($t->{'hash'});
2959                         if ($link_target) {
2960                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2961                                 if (defined $norm_target) {
2962                                         print " -> " .
2963                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2964                                                                      file_name=>$norm_target),
2965                                                        -title => $norm_target}, esc_path($link_target));
2966                                 } else {
2967                                         print " -> " . esc_path($link_target);
2968                                 }
2969                         }
2970                 }
2971                 print "</td>\n";
2972                 print "<td class=\"link\">";
2973                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2974                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2975                               "blob");
2976                 if ($have_blame) {
2977                         print " | " .
2978                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
2979                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
2980                                       "blame");
2981                 }
2982                 if (defined $hash_base) {
2983                         print " | " .
2984                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
2985                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
2986                                       "history");
2987                 }
2988                 print " | " .
2989                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
2990                                                file_name=>"$basedir$t->{'name'}")},
2991                                 "raw");
2992                 print "</td>\n";
2993
2994         } elsif ($t->{'type'} eq "tree") {
2995                 print "<td class=\"list\">";
2996                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
2997                                              file_name=>"$basedir$t->{'name'}", %base_key)},
2998                               esc_path($t->{'name'}));
2999                 print "</td>\n";
3000                 print "<td class=\"link\">";
3001                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3002                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3003                               "tree");
3004                 if (defined $hash_base) {
3005                         print " | " .
3006                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3007                                                      file_name=>"$basedir$t->{'name'}")},
3008                                       "history");
3009                 }
3010                 print "</td>\n";
3011         } else {
3012                 # unknown object: we can only present history for it
3013                 # (this includes 'commit' object, i.e. submodule support)
3014                 print "<td class=\"list\">" .
3015                       esc_path($t->{'name'}) .
3016                       "</td>\n";
3017                 print "<td class=\"link\">";
3018                 if (defined $hash_base) {
3019                         print $cgi->a({-href => href(action=>"history",
3020                                                      hash_base=>$hash_base,
3021                                                      file_name=>"$basedir$t->{'name'}")},
3022                                       "history");
3023                 }
3024                 print "</td>\n";
3025         }
3026 }
3027
3028 ## ......................................................................
3029 ## functions printing large fragments of HTML
3030
3031 # get pre-image filenames for merge (combined) diff
3032 sub fill_from_file_info {
3033         my ($diff, @parents) = @_;
3034
3035         $diff->{'from_file'} = [ ];
3036         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3037         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3038                 if ($diff->{'status'}[$i] eq 'R' ||
3039                     $diff->{'status'}[$i] eq 'C') {
3040                         $diff->{'from_file'}[$i] =
3041                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3042                 }
3043         }
3044
3045         return $diff;
3046 }
3047
3048 # is current raw difftree line of file deletion
3049 sub is_deleted {
3050         my $diffinfo = shift;
3051
3052         return $diffinfo->{'to_id'} eq ('0' x 40);
3053 }
3054
3055 # does patch correspond to [previous] difftree raw line
3056 # $diffinfo  - hashref of parsed raw diff format
3057 # $patchinfo - hashref of parsed patch diff format
3058 #              (the same keys as in $diffinfo)
3059 sub is_patch_split {
3060         my ($diffinfo, $patchinfo) = @_;
3061
3062         return defined $diffinfo && defined $patchinfo
3063                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3064 }
3065
3066
3067 sub git_difftree_body {
3068         my ($difftree, $hash, @parents) = @_;
3069         my ($parent) = $parents[0];
3070         my ($have_blame) = gitweb_check_feature('blame');
3071         print "<div class=\"list_head\">\n";
3072         if ($#{$difftree} > 10) {
3073                 print(($#{$difftree} + 1) . " files changed:\n");
3074         }
3075         print "</div>\n";
3076
3077         print "<table class=\"" .
3078               (@parents > 1 ? "combined " : "") .
3079               "diff_tree\">\n";
3080
3081         # header only for combined diff in 'commitdiff' view
3082         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3083         if ($has_header) {
3084                 # table header
3085                 print "<thead><tr>\n" .
3086                        "<th></th><th></th>\n"; # filename, patchN link
3087                 for (my $i = 0; $i < @parents; $i++) {
3088                         my $par = $parents[$i];
3089                         print "<th>" .
3090                               $cgi->a({-href => href(action=>"commitdiff",
3091                                                      hash=>$hash, hash_parent=>$par),
3092                                        -title => 'commitdiff to parent number ' .
3093                                                   ($i+1) . ': ' . substr($par,0,7)},
3094                                       $i+1) .
3095                               "&nbsp;</th>\n";
3096                 }
3097                 print "</tr></thead>\n<tbody>\n";
3098         }
3099
3100         my $alternate = 1;
3101         my $patchno = 0;
3102         foreach my $line (@{$difftree}) {
3103                 my $diff = parsed_difftree_line($line);
3104
3105                 if ($alternate) {
3106                         print "<tr class=\"dark\">\n";
3107                 } else {
3108                         print "<tr class=\"light\">\n";
3109                 }
3110                 $alternate ^= 1;
3111
3112                 if (exists $diff->{'nparents'}) { # combined diff
3113
3114                         fill_from_file_info($diff, @parents)
3115                                 unless exists $diff->{'from_file'};
3116
3117                         if (!is_deleted($diff)) {
3118                                 # file exists in the result (child) commit
3119                                 print "<td>" .
3120                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3121                                                              file_name=>$diff->{'to_file'},
3122                                                              hash_base=>$hash),
3123                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3124                                       "</td>\n";
3125                         } else {
3126                                 print "<td>" .
3127                                       esc_path($diff->{'to_file'}) .
3128                                       "</td>\n";
3129                         }
3130
3131                         if ($action eq 'commitdiff') {
3132                                 # link to patch
3133                                 $patchno++;
3134                                 print "<td class=\"link\">" .
3135                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3136                                       " | " .
3137                                       "</td>\n";
3138                         }
3139
3140                         my $has_history = 0;
3141                         my $not_deleted = 0;
3142                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3143                                 my $hash_parent = $parents[$i];
3144                                 my $from_hash = $diff->{'from_id'}[$i];
3145                                 my $from_path = $diff->{'from_file'}[$i];
3146                                 my $status = $diff->{'status'}[$i];
3147
3148                                 $has_history ||= ($status ne 'A');
3149                                 $not_deleted ||= ($status ne 'D');
3150
3151                                 if ($status eq 'A') {
3152                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3153                                 } elsif ($status eq 'D') {
3154                                         print "<td class=\"link\">" .
3155                                               $cgi->a({-href => href(action=>"blob",
3156                                                                      hash_base=>$hash,
3157                                                                      hash=>$from_hash,
3158                                                                      file_name=>$from_path)},
3159                                                       "blob" . ($i+1)) .
3160                                               " | </td>\n";
3161                                 } else {
3162                                         if ($diff->{'to_id'} eq $from_hash) {
3163                                                 print "<td class=\"link nochange\">";
3164                                         } else {
3165                                                 print "<td class=\"link\">";
3166                                         }
3167                                         print $cgi->a({-href => href(action=>"blobdiff",
3168                                                                      hash=>$diff->{'to_id'},
3169                                                                      hash_parent=>$from_hash,
3170                                                                      hash_base=>$hash,
3171                                                                      hash_parent_base=>$hash_parent,
3172                                                                      file_name=>$diff->{'to_file'},
3173                                                                      file_parent=>$from_path)},
3174                                                       "diff" . ($i+1)) .
3175                                               " | </td>\n";
3176                                 }
3177                         }
3178
3179                         print "<td class=\"link\">";
3180                         if ($not_deleted) {
3181                                 print $cgi->a({-href => href(action=>"blob",
3182                                                              hash=>$diff->{'to_id'},
3183                                                              file_name=>$diff->{'to_file'},
3184                                                              hash_base=>$hash)},
3185                                               "blob");
3186                                 print " | " if ($has_history);
3187                         }
3188                         if ($has_history) {
3189                                 print $cgi->a({-href => href(action=>"history",
3190                                                              file_name=>$diff->{'to_file'},
3191                                                              hash_base=>$hash)},
3192                                               "history");
3193                         }
3194                         print "</td>\n";
3195
3196                         print "</tr>\n";
3197                         next; # instead of 'else' clause, to avoid extra indent
3198                 }
3199                 # else ordinary diff
3200
3201                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3202                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3203                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3204                         $to_mode_oct = oct $diff->{'to_mode'};
3205                         if (S_ISREG($to_mode_oct)) { # only for regular file
3206                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3207                         }
3208                         $to_file_type = file_type($diff->{'to_mode'});
3209                 }
3210                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3211                         $from_mode_oct = oct $diff->{'from_mode'};
3212                         if (S_ISREG($to_mode_oct)) { # only for regular file
3213                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3214                         }
3215                         $from_file_type = file_type($diff->{'from_mode'});
3216                 }
3217
3218                 if ($diff->{'status'} eq "A") { # created
3219                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3220                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3221                         $mode_chng   .= "]</span>";
3222                         print "<td>";
3223                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3224                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3225                                       -class => "list"}, esc_path($diff->{'file'}));
3226                         print "</td>\n";
3227                         print "<td>$mode_chng</td>\n";
3228                         print "<td class=\"link\">";
3229                         if ($action eq 'commitdiff') {
3230                                 # link to patch
3231                                 $patchno++;
3232                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3233                                 print " | ";
3234                         }
3235                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3236                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3237                                       "blob");
3238                         print "</td>\n";
3239
3240                 } elsif ($diff->{'status'} eq "D") { # deleted
3241                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3242                         print "<td>";
3243                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3244                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3245                                        -class => "list"}, esc_path($diff->{'file'}));
3246                         print "</td>\n";
3247                         print "<td>$mode_chng</td>\n";
3248                         print "<td class=\"link\">";
3249                         if ($action eq 'commitdiff') {
3250                                 # link to patch
3251                                 $patchno++;
3252                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3253                                 print " | ";
3254                         }
3255                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3256                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3257                                       "blob") . " | ";
3258                         if ($have_blame) {
3259                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3260                                                              file_name=>$diff->{'file'})},
3261                                               "blame") . " | ";
3262                         }
3263                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3264                                                      file_name=>$diff->{'file'})},
3265                                       "history");
3266                         print "</td>\n";
3267
3268                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3269                         my $mode_chnge = "";
3270                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3271                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3272                                 if ($from_file_type ne $to_file_type) {
3273                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3274                                 }
3275                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3276                                         if ($from_mode_str && $to_mode_str) {
3277                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3278                                         } elsif ($to_mode_str) {
3279                                                 $mode_chnge .= " mode: $to_mode_str";
3280                                         }
3281                                 }
3282                                 $mode_chnge .= "]</span>\n";
3283                         }
3284                         print "<td>";
3285                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3286                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3287                                       -class => "list"}, esc_path($diff->{'file'}));
3288                         print "</td>\n";
3289                         print "<td>$mode_chnge</td>\n";
3290                         print "<td class=\"link\">";
3291                         if ($action eq 'commitdiff') {
3292                                 # link to patch
3293                                 $patchno++;
3294                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3295                                       " | ";
3296                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3297                                 # "commit" view and modified file (not onlu mode changed)
3298                                 print $cgi->a({-href => href(action=>"blobdiff",
3299                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3300                                                              hash_base=>$hash, hash_parent_base=>$parent,
3301                                                              file_name=>$diff->{'file'})},
3302                                               "diff") .
3303                                       " | ";
3304                         }
3305                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3306                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3307                                        "blob") . " | ";
3308                         if ($have_blame) {
3309                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3310                                                              file_name=>$diff->{'file'})},
3311                                               "blame") . " | ";
3312                         }
3313                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3314                                                      file_name=>$diff->{'file'})},
3315                                       "history");
3316                         print "</td>\n";
3317
3318                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3319                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3320                         my $nstatus = $status_name{$diff->{'status'}};
3321                         my $mode_chng = "";
3322                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3323                                 # mode also for directories, so we cannot use $to_mode_str
3324                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3325                         }
3326                         print "<td>" .
3327                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3328                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3329                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3330                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3331                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3332                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3333                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3334                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3335                               "<td class=\"link\">";
3336                         if ($action eq 'commitdiff') {
3337                                 # link to patch
3338                                 $patchno++;
3339                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3340                                       " | ";
3341                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3342                                 # "commit" view and modified file (not only pure rename or copy)
3343                                 print $cgi->a({-href => href(action=>"blobdiff",
3344                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3345                                                              hash_base=>$hash, hash_parent_base=>$parent,
3346                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3347                                               "diff") .
3348                                       " | ";
3349                         }
3350                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3351                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3352                                       "blob") . " | ";
3353                         if ($have_blame) {
3354                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3355                                                              file_name=>$diff->{'to_file'})},
3356                                               "blame") . " | ";
3357                         }
3358                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3359                                                     file_name=>$diff->{'to_file'})},
3360                                       "history");
3361                         print "</td>\n";
3362
3363                 } # we should not encounter Unmerged (U) or Unknown (X) status
3364                 print "</tr>\n";
3365         }
3366         print "</tbody>" if $has_header;
3367         print "</table>\n";
3368 }
3369
3370 sub git_patchset_body {
3371         my ($fd, $difftree, $hash, @hash_parents) = @_;
3372         my ($hash_parent) = $hash_parents[0];
3373
3374         my $is_combined = (@hash_parents > 1);
3375         my $patch_idx = 0;
3376         my $patch_number = 0;
3377         my $patch_line;
3378         my $diffinfo;
3379         my $to_name;
3380         my (%from, %to);
3381
3382         print "<div class=\"patchset\">\n";
3383
3384         # skip to first patch
3385         while ($patch_line = <$fd>) {
3386                 chomp $patch_line;
3387
3388                 last if ($patch_line =~ m/^diff /);
3389         }
3390
3391  PATCH:
3392         while ($patch_line) {
3393
3394                 # parse "git diff" header line
3395                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3396                         # $1 is from_name, which we do not use
3397                         $to_name = unquote($2);
3398                         $to_name =~ s!^b/!!;
3399                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3400                         # $1 is 'cc' or 'combined', which we do not use
3401                         $to_name = unquote($2);
3402                 } else {
3403                         $to_name = undef;
3404                 }
3405
3406                 # check if current patch belong to current raw line
3407                 # and parse raw git-diff line if needed
3408                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3409                         # this is continuation of a split patch
3410                         print "<div class=\"patch cont\">\n";
3411                 } else {
3412                         # advance raw git-diff output if needed
3413                         $patch_idx++ if defined $diffinfo;
3414
3415                         # read and prepare patch information
3416                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3417
3418                         # compact combined diff output can have some patches skipped
3419                         # find which patch (using pathname of result) we are at now;
3420                         if ($is_combined) {
3421                                 while ($to_name ne $diffinfo->{'to_file'}) {
3422                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3423                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3424                                               "</div>\n";  # class="patch"
3425
3426                                         $patch_idx++;
3427                                         $patch_number++;
3428
3429                                         last if $patch_idx > $#$difftree;
3430                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3431                                 }
3432                         }
3433
3434                         # modifies %from, %to hashes
3435                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3436
3437                         # this is first patch for raw difftree line with $patch_idx index
3438                         # we index @$difftree array from 0, but number patches from 1
3439                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3440                 }
3441
3442                 # git diff header
3443                 #assert($patch_line =~ m/^diff /) if DEBUG;
3444                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3445                 $patch_number++;
3446                 # print "git diff" header
3447                 print format_git_diff_header_line($patch_line, $diffinfo,
3448                                                   \%from, \%to);
3449
3450                 # print extended diff header
3451                 print "<div class=\"diff extended_header\">\n";
3452         EXTENDED_HEADER:
3453                 while ($patch_line = <$fd>) {
3454                         chomp $patch_line;
3455
3456                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3457
3458                         print format_extended_diff_header_line($patch_line, $diffinfo,
3459                                                                \%from, \%to);
3460                 }
3461                 print "</div>\n"; # class="diff extended_header"
3462
3463                 # from-file/to-file diff header
3464                 if (! $patch_line) {
3465                         print "</div>\n"; # class="patch"
3466                         last PATCH;
3467                 }
3468                 next PATCH if ($patch_line =~ m/^diff /);
3469                 #assert($patch_line =~ m/^---/) if DEBUG;
3470
3471                 my $last_patch_line = $patch_line;
3472                 $patch_line = <$fd>;
3473                 chomp $patch_line;
3474                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3475
3476                 print format_diff_from_to_header($last_patch_line, $patch_line,
3477                                                  $diffinfo, \%from, \%to,
3478                                                  @hash_parents);
3479
3480                 # the patch itself
3481         LINE:
3482                 while ($patch_line = <$fd>) {
3483                         chomp $patch_line;
3484
3485                         next PATCH if ($patch_line =~ m/^diff /);
3486
3487                         print format_diff_line($patch_line, \%from, \%to);
3488                 }
3489
3490         } continue {
3491                 print "</div>\n"; # class="patch"
3492         }
3493
3494         # for compact combined (--cc) format, with chunk and patch simpliciaction
3495         # patchset might be empty, but there might be unprocessed raw lines
3496         for (++$patch_idx if $patch_number > 0;
3497              $patch_idx < @$difftree;
3498              ++$patch_idx) {
3499                 # read and prepare patch information
3500                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3501
3502                 # generate anchor for "patch" links in difftree / whatchanged part
3503                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3504                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3505                       "</div>\n";  # class="patch"
3506
3507                 $patch_number++;
3508         }
3509
3510         if ($patch_number == 0) {
3511                 if (@hash_parents > 1) {
3512                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3513                 } else {
3514                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3515                 }
3516         }
3517
3518         print "</div>\n"; # class="patchset"
3519 }
3520
3521 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3522
3523 sub git_project_list_body {
3524         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3525
3526         my ($check_forks) = gitweb_check_feature('forks');
3527
3528         my @projects;
3529         foreach my $pr (@$projlist) {
3530                 my (@aa) = git_get_last_activity($pr->{'path'});
3531                 unless (@aa) {
3532                         next;
3533                 }
3534                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3535                 if (!defined $pr->{'descr'}) {
3536                         my $descr = git_get_project_description($pr->{'path'}) || "";
3537                         $pr->{'descr_long'} = to_utf8($descr);
3538                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3539                 }
3540                 if (!defined $pr->{'owner'}) {
3541                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3542                 }
3543                 if ($check_forks) {
3544                         my $pname = $pr->{'path'};
3545                         if (($pname =~ s/\.git$//) &&
3546                             ($pname !~ /\/$/) &&
3547                             (-d "$projectroot/$pname")) {
3548                                 $pr->{'forks'} = "-d $projectroot/$pname";
3549                         }
3550                         else {
3551                                 $pr->{'forks'} = 0;
3552                         }
3553                 }
3554                 push @projects, $pr;
3555         }
3556
3557         $order ||= $default_projects_order;
3558         $from = 0 unless defined $from;
3559         $to = $#projects if (!defined $to || $#projects < $to);
3560
3561         print "<table class=\"project_list\">\n";
3562         unless ($no_header) {
3563                 print "<tr>\n";
3564                 if ($check_forks) {
3565                         print "<th></th>\n";
3566                 }
3567                 if ($order eq "project") {
3568                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3569                         print "<th>Project</th>\n";
3570                 } else {
3571                         print "<th>" .
3572                               $cgi->a({-href => href(project=>undef, order=>'project'),
3573                                        -class => "header"}, "Project") .
3574                               "</th>\n";
3575                 }
3576                 if ($order eq "descr") {
3577                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3578                         print "<th>Description</th>\n";
3579                 } else {
3580                         print "<th>" .
3581                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3582                                        -class => "header"}, "Description") .
3583                               "</th>\n";
3584                 }
3585                 if ($order eq "owner") {
3586                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3587                         print "<th>Owner</th>\n";
3588                 } else {
3589                         print "<th>" .
3590                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3591                                        -class => "header"}, "Owner") .
3592                               "</th>\n";
3593                 }
3594                 if ($order eq "age") {
3595                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3596                         print "<th>Last Change</th>\n";
3597                 } else {
3598                         print "<th>" .
3599                               $cgi->a({-href => href(project=>undef, order=>'age'),
3600                                        -class => "header"}, "Last Change") .
3601                               "</th>\n";
3602                 }
3603                 print "<th></th>\n" .
3604                       "</tr>\n";
3605         }
3606         my $alternate = 1;
3607         for (my $i = $from; $i <= $to; $i++) {
3608                 my $pr = $projects[$i];
3609                 if ($alternate) {
3610                         print "<tr class=\"dark\">\n";
3611                 } else {
3612                         print "<tr class=\"light\">\n";
3613                 }
3614                 $alternate ^= 1;
3615                 if ($check_forks) {
3616                         print "<td>";
3617                         if ($pr->{'forks'}) {
3618                                 print "<!-- $pr->{'forks'} -->\n";
3619                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3620                         }
3621                         print "</td>\n";
3622                 }
3623                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3624                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3625                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3626                                         -class => "list", -title => $pr->{'descr_long'}},
3627                                         esc_html($pr->{'descr'})) . "</td>\n" .
3628                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3629                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3630                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3631                       "<td class=\"link\">" .
3632                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3633                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3634                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3635                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3636                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3637                       "</td>\n" .
3638                       "</tr>\n";
3639         }
3640         if (defined $extra) {
3641                 print "<tr>\n";
3642                 if ($check_forks) {
3643                         print "<td></td>\n";
3644                 }
3645                 print "<td colspan=\"5\">$extra</td>\n" .
3646                       "</tr>\n";
3647         }
3648         print "</table>\n";
3649 }
3650
3651 sub git_shortlog_body {
3652         # uses global variable $project
3653         my ($commitlist, $from, $to, $refs, $extra) = @_;
3654
3655         $from = 0 unless defined $from;
3656         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3657
3658         print "<table class=\"shortlog\">\n";
3659         my $alternate = 1;
3660         for (my $i = $from; $i <= $to; $i++) {
3661                 my %co = %{$commitlist->[$i]};
3662                 my $commit = $co{'id'};
3663                 my $ref = format_ref_marker($refs, $commit);
3664                 if ($alternate) {
3665                         print "<tr class=\"dark\">\n";
3666                 } else {
3667                         print "<tr class=\"light\">\n";
3668                 }
3669                 $alternate ^= 1;
3670                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3671                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3672                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3673                       "<td><i>" . $author . "</i></td>\n" .
3674                       "<td>";
3675                 print format_subject_html($co{'title'}, $co{'title_short'},
3676                                           href(action=>"commit", hash=>$commit), $ref);
3677                 print "</td>\n" .
3678                       "<td class=\"link\">" .
3679                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3680                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3681                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3682                 my $snapshot_links = format_snapshot_links($commit);
3683                 if (defined $snapshot_links) {
3684                         print " | " . $snapshot_links;
3685                 }
3686                 print "</td>\n" .
3687                       "</tr>\n";
3688         }
3689         if (defined $extra) {
3690                 print "<tr>\n" .
3691                       "<td colspan=\"4\">$extra</td>\n" .
3692                       "</tr>\n";
3693         }
3694         print "</table>\n";
3695 }
3696
3697 sub git_history_body {
3698         # Warning: assumes constant type (blob or tree) during history
3699         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3700
3701         $from = 0 unless defined $from;
3702         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3703
3704         print "<table class=\"history\">\n";
3705         my $alternate = 1;
3706         for (my $i = $from; $i <= $to; $i++) {
3707                 my %co = %{$commitlist->[$i]};
3708                 if (!%co) {
3709                         next;
3710                 }
3711                 my $commit = $co{'id'};
3712
3713                 my $ref = format_ref_marker($refs, $commit);
3714
3715                 if ($alternate) {
3716                         print "<tr class=\"dark\">\n";
3717                 } else {
3718                         print "<tr class=\"light\">\n";
3719                 }
3720                 $alternate ^= 1;
3721         # shortlog uses      chop_str($co{'author_name'}, 10)
3722                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3723                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3724                       "<td><i>" . $author . "</i></td>\n" .
3725                       "<td>";
3726                 # originally git_history used chop_str($co{'title'}, 50)
3727                 print format_subject_html($co{'title'}, $co{'title_short'},
3728                                           href(action=>"commit", hash=>$commit), $ref);
3729                 print "</td>\n" .
3730                       "<td class=\"link\">" .
3731                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3732                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3733
3734                 if ($ftype eq 'blob') {
3735                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3736                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3737                         if (defined $blob_current && defined $blob_parent &&
3738                                         $blob_current ne $blob_parent) {
3739                                 print " | " .
3740                                         $cgi->a({-href => href(action=>"blobdiff",
3741                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3742                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3743                                                                file_name=>$file_name)},
3744                                                 "diff to current");
3745                         }
3746                 }
3747                 print "</td>\n" .
3748                       "</tr>\n";
3749         }
3750         if (defined $extra) {
3751                 print "<tr>\n" .
3752                       "<td colspan=\"4\">$extra</td>\n" .
3753                       "</tr>\n";
3754         }
3755         print "</table>\n";
3756 }
3757
3758 sub git_tags_body {
3759         # uses global variable $project
3760         my ($taglist, $from, $to, $extra) = @_;
3761         $from = 0 unless defined $from;
3762         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3763
3764         print "<table class=\"tags\">\n";
3765         my $alternate = 1;
3766         for (my $i = $from; $i <= $to; $i++) {
3767                 my $entry = $taglist->[$i];
3768                 my %tag = %$entry;
3769                 my $comment = $tag{'subject'};
3770                 my $comment_short;
3771                 if (defined $comment) {
3772                         $comment_short = chop_str($comment, 30, 5);
3773                 }
3774                 if ($alternate) {
3775                         print "<tr class=\"dark\">\n";
3776                 } else {
3777                         print "<tr class=\"light\">\n";
3778                 }
3779                 $alternate ^= 1;
3780                 if (defined $tag{'age'}) {
3781                         print "<td><i>$tag{'age'}</i></td>\n";
3782                 } else {
3783                         print "<td></td>\n";
3784                 }
3785                 print "<td>" .
3786                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3787                                -class => "list name"}, esc_html($tag{'name'})) .
3788                       "</td>\n" .
3789                       "<td>";
3790                 if (defined $comment) {
3791                         print format_subject_html($comment, $comment_short,
3792                                                   href(action=>"tag", hash=>$tag{'id'}));
3793                 }
3794                 print "</td>\n" .
3795                       "<td class=\"selflink\">";
3796                 if ($tag{'type'} eq "tag") {
3797                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3798                 } else {
3799                         print "&nbsp;";
3800                 }
3801                 print "</td>\n" .
3802                       "<td class=\"link\">" . " | " .
3803                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3804                 if ($tag{'reftype'} eq "commit") {
3805                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3806                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3807                 } elsif ($tag{'reftype'} eq "blob") {
3808                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3809                 }
3810                 print "</td>\n" .
3811                       "</tr>";
3812         }
3813         if (defined $extra) {
3814                 print "<tr>\n" .
3815                       "<td colspan=\"5\">$extra</td>\n" .
3816                       "</tr>\n";
3817         }
3818         print "</table>\n";
3819 }
3820
3821 sub git_heads_body {
3822         # uses global variable $project
3823         my ($headlist, $head, $from, $to, $extra) = @_;
3824         $from = 0 unless defined $from;
3825         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3826
3827         print "<table class=\"heads\">\n";
3828         my $alternate = 1;
3829         for (my $i = $from; $i <= $to; $i++) {
3830                 my $entry = $headlist->[$i];
3831                 my %ref = %$entry;
3832                 my $curr = $ref{'id'} eq $head;
3833                 if ($alternate) {
3834                         print "<tr class=\"dark\">\n";
3835                 } else {
3836                         print "<tr class=\"light\">\n";
3837                 }
3838                 $alternate ^= 1;
3839                 print "<td><i>$ref{'age'}</i></td>\n" .
3840                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3841                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3842                                -class => "list name"},esc_html($ref{'name'})) .
3843                       "</td>\n" .
3844                       "<td class=\"link\">" .
3845                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3846                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3847                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3848                       "</td>\n" .
3849                       "</tr>";
3850         }
3851         if (defined $extra) {
3852                 print "<tr>\n" .
3853                       "<td colspan=\"3\">$extra</td>\n" .
3854                       "</tr>\n";
3855         }
3856         print "</table>\n";
3857 }
3858
3859 sub git_search_grep_body {
3860         my ($commitlist, $from, $to, $extra) = @_;
3861         $from = 0 unless defined $from;
3862         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3863
3864         print "<table class=\"commit_search\">\n";
3865         my $alternate = 1;
3866         for (my $i = $from; $i <= $to; $i++) {
3867                 my %co = %{$commitlist->[$i]};
3868                 if (!%co) {
3869                         next;
3870                 }
3871                 my $commit = $co{'id'};
3872                 if ($alternate) {
3873                         print "<tr class=\"dark\">\n";
3874                 } else {
3875                         print "<tr class=\"light\">\n";
3876                 }
3877                 $alternate ^= 1;
3878                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3879                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3880                       "<td><i>" . $author . "</i></td>\n" .
3881                       "<td>" .
3882                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3883                                -class => "list subject"},
3884                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3885                 my $comment = $co{'comment'};
3886                 foreach my $line (@$comment) {
3887                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3888                                 my ($lead, $match, $trail) = ($1, $2, $3);
3889                                 $match = chop_str($match, 70, 5, 'center');
3890                                 my $contextlen = int((80 - length($match))/2);
3891                                 $contextlen = 30 if ($contextlen > 30);
3892                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3893                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3894
3895                                 $lead  = esc_html($lead);
3896                                 $match = esc_html($match);
3897                                 $trail = esc_html($trail);
3898
3899                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3900                         }
3901                 }
3902                 print "</td>\n" .
3903                       "<td class=\"link\">" .
3904                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3905                       " | " .
3906                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3907                       " | " .
3908                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3909                 print "</td>\n" .
3910                       "</tr>\n";
3911         }
3912         if (defined $extra) {
3913                 print "<tr>\n" .
3914                       "<td colspan=\"3\">$extra</td>\n" .
3915                       "</tr>\n";
3916         }
3917         print "</table>\n";
3918 }
3919
3920 ## ======================================================================
3921 ## ======================================================================
3922 ## actions
3923
3924 sub git_project_list {
3925         my $order = $cgi->param('o');
3926         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3927                 die_error(undef, "Unknown order parameter");
3928         }
3929
3930         my @list = git_get_projects_list();
3931         if (!@list) {
3932                 die_error(undef, "No projects found");
3933         }
3934
3935         git_header_html();
3936         if (-f $home_text) {
3937                 print "<div class=\"index_include\">\n";
3938                 open (my $fd, $home_text);
3939                 print <$fd>;
3940                 close $fd;
3941                 print "</div>\n";
3942         }
3943         git_project_list_body(\@list, $order);
3944         git_footer_html();
3945 }
3946
3947 sub git_forks {
3948         my $order = $cgi->param('o');
3949         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3950                 die_error(undef, "Unknown order parameter");
3951         }
3952
3953         my @list = git_get_projects_list($project);
3954         if (!@list) {
3955                 die_error(undef, "No forks found");
3956         }
3957
3958         git_header_html();
3959         git_print_page_nav('','');
3960         git_print_header_div('summary', "$project forks");
3961         git_project_list_body(\@list, $order);
3962         git_footer_html();
3963 }
3964
3965 sub git_project_index {
3966         my @projects = git_get_projects_list($project);
3967
3968         print $cgi->header(
3969                 -type => 'text/plain',
3970                 -charset => 'utf-8',
3971                 -content_disposition => 'inline; filename="index.aux"');
3972
3973         foreach my $pr (@projects) {
3974                 if (!exists $pr->{'owner'}) {
3975                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
3976                 }
3977
3978                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
3979                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
3980                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3981                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
3982                 $path  =~ s/ /\+/g;
3983                 $owner =~ s/ /\+/g;
3984
3985                 print "$path $owner\n";
3986         }
3987 }
3988
3989 sub git_summary {
3990         my $descr = git_get_project_description($project) || "none";
3991         my %co = parse_commit("HEAD");
3992         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
3993         my $head = $co{'id'};
3994
3995         my $owner = git_get_project_owner($project);
3996
3997         my $refs = git_get_references();
3998         # These get_*_list functions return one more to allow us to see if
3999         # there are more ...
4000         my @taglist  = git_get_tags_list(16);
4001         my @headlist = git_get_heads_list(16);
4002         my @forklist;
4003         my ($check_forks) = gitweb_check_feature('forks');
4004
4005         if ($check_forks) {
4006                 @forklist = git_get_projects_list($project);
4007         }
4008
4009         git_header_html();
4010         git_print_page_nav('summary','', $head);
4011
4012         print "<div class=\"title\">&nbsp;</div>\n";
4013         print "<table class=\"projects_list\">\n" .
4014               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4015               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4016         if (defined $cd{'rfc2822'}) {
4017                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4018         }
4019
4020         # use per project git URL list in $projectroot/$project/cloneurl
4021         # or make project git URL from git base URL and project name
4022         my $url_tag = "URL";
4023         my @url_list = git_get_project_url_list($project);
4024         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4025         foreach my $git_url (@url_list) {
4026                 next unless $git_url;
4027                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4028                 $url_tag = "";
4029         }
4030         print "</table>\n";
4031
4032         if (-s "$projectroot/$project/README.html") {
4033                 if (open my $fd, "$projectroot/$project/README.html") {
4034                         print "<div class=\"title\">readme</div>\n" .
4035                               "<div class=\"readme\">\n";
4036                         print $_ while (<$fd>);
4037                         print "\n</div>\n"; # class="readme"
4038                         close $fd;
4039                 }
4040         }
4041
4042         # we need to request one more than 16 (0..15) to check if
4043         # those 16 are all
4044         my @commitlist = $head ? parse_commits($head, 17) : ();
4045         if (@commitlist) {
4046                 git_print_header_div('shortlog');
4047                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4048                                   $#commitlist <=  15 ? undef :
4049                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4050         }
4051
4052         if (@taglist) {
4053                 git_print_header_div('tags');
4054                 git_tags_body(\@taglist, 0, 15,
4055                               $#taglist <=  15 ? undef :
4056                               $cgi->a({-href => href(action=>"tags")}, "..."));
4057         }
4058
4059         if (@headlist) {
4060                 git_print_header_div('heads');
4061                 git_heads_body(\@headlist, $head, 0, 15,
4062                                $#headlist <= 15 ? undef :
4063                                $cgi->a({-href => href(action=>"heads")}, "..."));
4064         }
4065
4066         if (@forklist) {
4067                 git_print_header_div('forks');
4068                 git_project_list_body(\@forklist, undef, 0, 15,
4069                                       $#forklist <= 15 ? undef :
4070                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4071                                       'noheader');
4072         }
4073
4074         git_footer_html();
4075 }
4076
4077 sub git_tag {
4078         my $head = git_get_head_hash($project);
4079         git_header_html();
4080         git_print_page_nav('','', $head,undef,$head);
4081         my %tag = parse_tag($hash);
4082
4083         if (! %tag) {
4084                 die_error(undef, "Unknown tag object");
4085         }
4086
4087         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4088         print "<div class=\"title_text\">\n" .
4089               "<table class=\"object_header\">\n" .
4090               "<tr>\n" .
4091               "<td>object</td>\n" .
4092               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4093                                $tag{'object'}) . "</td>\n" .
4094               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4095                                               $tag{'type'}) . "</td>\n" .
4096               "</tr>\n";
4097         if (defined($tag{'author'})) {
4098                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4099                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4100                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4101                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4102                         "</td></tr>\n";
4103         }
4104         print "</table>\n\n" .
4105               "</div>\n";
4106         print "<div class=\"page_body\">";
4107         my $comment = $tag{'comment'};
4108         foreach my $line (@$comment) {
4109                 chomp $line;
4110                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4111         }
4112         print "</div>\n";
4113         git_footer_html();
4114 }
4115
4116 sub git_blame2 {
4117         my $fd;
4118         my $ftype;
4119
4120         my ($have_blame) = gitweb_check_feature('blame');
4121         if (!$have_blame) {
4122                 die_error('403 Permission denied', "Permission denied");
4123         }
4124         die_error('404 Not Found', "File name not defined") if (!$file_name);
4125         $hash_base ||= git_get_head_hash($project);
4126         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4127         my %co = parse_commit($hash_base)
4128                 or die_error(undef, "Reading commit failed");
4129         if (!defined $hash) {
4130                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4131                         or die_error(undef, "Error looking up file");
4132         }
4133         $ftype = git_get_type($hash);
4134         if ($ftype !~ "blob") {
4135                 die_error('400 Bad Request', "Object is not a blob");
4136         }
4137         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4138               $file_name, $hash_base)
4139                 or die_error(undef, "Open git-blame failed");
4140         git_header_html();
4141         my $formats_nav =
4142                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4143                         "blob") .
4144                 " | " .
4145                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4146                         "history") .
4147                 " | " .
4148                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4149                         "HEAD");
4150         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4151         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4152         git_print_page_path($file_name, $ftype, $hash_base);
4153         my @rev_color = (qw(light2 dark2));
4154         my $num_colors = scalar(@rev_color);
4155         my $current_color = 0;
4156         my $last_rev;
4157         print <<HTML;
4158 <div class="page_body">
4159 <table class="blame">
4160 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4161 HTML
4162         my %metainfo = ();
4163         while (1) {
4164                 $_ = <$fd>;
4165                 last unless defined $_;
4166                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4167                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4168                 if (!exists $metainfo{$full_rev}) {
4169                         $metainfo{$full_rev} = {};
4170                 }
4171                 my $meta = $metainfo{$full_rev};
4172                 while (<$fd>) {
4173                         last if (s/^\t//);
4174                         if (/^(\S+) (.*)$/) {
4175                                 $meta->{$1} = $2;
4176                         }
4177                 }
4178                 my $data = $_;
4179                 chomp $data;
4180                 my $rev = substr($full_rev, 0, 8);
4181                 my $author = $meta->{'author'};
4182                 my %date = parse_date($meta->{'author-time'},
4183                                       $meta->{'author-tz'});
4184                 my $date = $date{'iso-tz'};
4185                 if ($group_size) {
4186                         $current_color = ++$current_color % $num_colors;
4187                 }
4188                 print "<tr class=\"$rev_color[$current_color]\">\n";
4189                 if ($group_size) {
4190                         print "<td class=\"sha1\"";
4191                         print " title=\"". esc_html($author) . ", $date\"";
4192                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4193                         print ">";
4194                         print $cgi->a({-href => href(action=>"commit",
4195                                                      hash=>$full_rev,
4196                                                      file_name=>$file_name)},
4197                                       esc_html($rev));
4198                         print "</td>\n";
4199                 }
4200                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4201                         or die_error(undef, "Open git-rev-parse failed");
4202                 my $parent_commit = <$dd>;
4203                 close $dd;
4204                 chomp($parent_commit);
4205                 my $blamed = href(action => 'blame',
4206                                   file_name => $meta->{'filename'},
4207                                   hash_base => $parent_commit);
4208                 print "<td class=\"linenr\">";
4209                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4210                                 -id => "l$lineno",
4211                                 -class => "linenr" },
4212                               esc_html($lineno));
4213                 print "</td>";
4214                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4215                 print "</tr>\n";
4216         }
4217         print "</table>\n";
4218         print "</div>";
4219         close $fd
4220                 or print "Reading blob failed\n";
4221         git_footer_html();
4222 }
4223
4224 sub git_blame {
4225         my $fd;
4226
4227         my ($have_blame) = gitweb_check_feature('blame');
4228         if (!$have_blame) {
4229                 die_error('403 Permission denied', "Permission denied");
4230         }
4231         die_error('404 Not Found', "File name not defined") if (!$file_name);
4232         $hash_base ||= git_get_head_hash($project);
4233         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4234         my %co = parse_commit($hash_base)
4235                 or die_error(undef, "Reading commit failed");
4236         if (!defined $hash) {
4237                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4238                         or die_error(undef, "Error lookup file");
4239         }
4240         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4241                 or die_error(undef, "Open git-annotate failed");
4242         git_header_html();
4243         my $formats_nav =
4244                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4245                         "blob") .
4246                 " | " .
4247                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4248                         "history") .
4249                 " | " .
4250                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4251                         "HEAD");
4252         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4253         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4254         git_print_page_path($file_name, 'blob', $hash_base);
4255         print "<div class=\"page_body\">\n";
4256         print <<HTML;
4257 <table class="blame">
4258   <tr>
4259     <th>Commit</th>
4260     <th>Age</th>
4261     <th>Author</th>
4262     <th>Line</th>
4263     <th>Data</th>
4264   </tr>
4265 HTML
4266         my @line_class = (qw(light dark));
4267         my $line_class_len = scalar (@line_class);
4268         my $line_class_num = $#line_class;
4269         while (my $line = <$fd>) {
4270                 my $long_rev;
4271                 my $short_rev;
4272                 my $author;
4273                 my $time;
4274                 my $lineno;
4275                 my $data;
4276                 my $age;
4277                 my $age_str;
4278                 my $age_class;
4279
4280                 chomp $line;
4281                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4282
4283                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4284                         $long_rev = $1;
4285                         $author   = $2;
4286                         $time     = $3;
4287                         $lineno   = $4;
4288                         $data     = $5;
4289                 } else {
4290                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4291                         next;
4292                 }
4293                 $short_rev  = substr ($long_rev, 0, 8);
4294                 $age        = time () - $time;
4295                 $age_str    = age_string ($age);
4296                 $age_str    =~ s/ /&nbsp;/g;
4297                 $age_class  = age_class($age);
4298                 $author     = esc_html ($author);
4299                 $author     =~ s/ /&nbsp;/g;
4300
4301                 $data = untabify($data);
4302                 $data = esc_html ($data);
4303
4304                 print <<HTML;
4305   <tr class="$line_class[$line_class_num]">
4306     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4307     <td class="$age_class">$age_str</td>
4308     <td>$author</td>
4309     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4310     <td class="pre">$data</td>
4311   </tr>
4312 HTML
4313         } # while (my $line = <$fd>)
4314         print "</table>\n\n";
4315         close $fd
4316                 or print "Reading blob failed.\n";
4317         print "</div>";
4318         git_footer_html();
4319 }
4320
4321 sub git_tags {
4322         my $head = git_get_head_hash($project);
4323         git_header_html();
4324         git_print_page_nav('','', $head,undef,$head);
4325         git_print_header_div('summary', $project);
4326
4327         my @tagslist = git_get_tags_list();
4328         if (@tagslist) {
4329                 git_tags_body(\@tagslist);
4330         }
4331         git_footer_html();
4332 }
4333
4334 sub git_heads {
4335         my $head = git_get_head_hash($project);
4336         git_header_html();
4337         git_print_page_nav('','', $head,undef,$head);
4338         git_print_header_div('summary', $project);
4339
4340         my @headslist = git_get_heads_list();
4341         if (@headslist) {
4342                 git_heads_body(\@headslist, $head);
4343         }
4344         git_footer_html();
4345 }
4346
4347 sub git_blob_plain {
4348         my $type = shift;
4349         my $expires;
4350
4351         if (!defined $hash) {
4352                 if (defined $file_name) {
4353                         my $base = $hash_base || git_get_head_hash($project);
4354                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4355                                 or die_error(undef, "Error lookup file");
4356                 } else {
4357                         die_error(undef, "No file name defined");
4358                 }
4359         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4360                 # blobs defined by non-textual hash id's can be cached
4361                 $expires = "+1d";
4362         }
4363
4364         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4365                 or die_error(undef, "Open git-cat-file blob '$hash' failed");
4366
4367         # content-type (can include charset)
4368         $type = blob_contenttype($fd, $file_name, $type);
4369
4370         # "save as" filename, even when no $file_name is given
4371         my $save_as = "$hash";
4372         if (defined $file_name) {
4373                 $save_as = $file_name;
4374         } elsif ($type =~ m/^text\//) {
4375                 $save_as .= '.txt';
4376         }
4377
4378         print $cgi->header(
4379                 -type => $type,
4380                 -expires => $expires,
4381                 -content_disposition => 'inline; filename="' . $save_as . '"');
4382         undef $/;
4383         binmode STDOUT, ':raw';
4384         print <$fd>;
4385         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4386         $/ = "\n";
4387         close $fd;
4388 }
4389
4390 sub git_blob {
4391         my $expires;
4392
4393         if (!defined $hash) {
4394                 if (defined $file_name) {
4395                         my $base = $hash_base || git_get_head_hash($project);
4396                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4397                                 or die_error(undef, "Error lookup file");
4398                 } else {
4399                         die_error(undef, "No file name defined");
4400                 }
4401         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4402                 # blobs defined by non-textual hash id's can be cached
4403                 $expires = "+1d";
4404         }
4405
4406         my ($have_blame) = gitweb_check_feature('blame');
4407         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4408                 or die_error(undef, "Couldn't cat $file_name, $hash");
4409         my $mimetype = blob_mimetype($fd, $file_name);
4410         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4411                 close $fd;
4412                 return git_blob_plain($mimetype);
4413         }
4414         # we can have blame only for text/* mimetype
4415         $have_blame &&= ($mimetype =~ m!^text/!);
4416
4417         git_header_html(undef, $expires);
4418         my $formats_nav = '';
4419         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4420                 if (defined $file_name) {
4421                         if ($have_blame) {
4422                                 $formats_nav .=
4423                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4424                                                 "blame") .
4425                                         " | ";
4426                         }
4427                         $formats_nav .=
4428                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4429                                         "history") .
4430                                 " | " .
4431                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4432                                         "raw") .
4433                                 " | " .
4434                                 $cgi->a({-href => href(action=>"blob",
4435                                                        hash_base=>"HEAD", file_name=>$file_name)},
4436                                         "HEAD");
4437                 } else {
4438                         $formats_nav .=
4439                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4440                                         "raw");
4441                 }
4442                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4443                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4444         } else {
4445                 print "<div class=\"page_nav\">\n" .
4446                       "<br/><br/></div>\n" .
4447                       "<div class=\"title\">$hash</div>\n";
4448         }
4449         git_print_page_path($file_name, "blob", $hash_base);
4450         print "<div class=\"page_body\">\n";
4451         if ($mimetype =~ m!^image/!) {
4452                 print qq!<img type="$mimetype"!;
4453                 if ($file_name) {
4454                         print qq! alt="$file_name" title="$file_name"!;
4455                 }
4456                 print qq! src="! .
4457                       href(action=>"blob_plain", hash=>$hash,
4458                            hash_base=>$hash_base, file_name=>$file_name) .
4459                       qq!" />\n!;
4460         } else {
4461                 my $nr;
4462                 while (my $line = <$fd>) {
4463                         chomp $line;
4464                         $nr++;
4465                         $line = untabify($line);
4466                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4467                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4468                 }
4469         }
4470         close $fd
4471                 or print "Reading blob failed.\n";
4472         print "</div>";
4473         git_footer_html();
4474 }
4475
4476 sub git_tree {
4477         if (!defined $hash_base) {
4478                 $hash_base = "HEAD";
4479         }
4480         if (!defined $hash) {
4481                 if (defined $file_name) {
4482                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4483                 } else {
4484                         $hash = $hash_base;
4485                 }
4486         }
4487         $/ = "\0";
4488         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4489                 or die_error(undef, "Open git-ls-tree failed");
4490         my @entries = map { chomp; $_ } <$fd>;
4491         close $fd or die_error(undef, "Reading tree failed");
4492         $/ = "\n";
4493
4494         my $refs = git_get_references();
4495         my $ref = format_ref_marker($refs, $hash_base);
4496         git_header_html();
4497         my $basedir = '';
4498         my ($have_blame) = gitweb_check_feature('blame');
4499         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4500                 my @views_nav = ();
4501                 if (defined $file_name) {
4502                         push @views_nav,
4503                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4504                                         "history"),
4505                                 $cgi->a({-href => href(action=>"tree",
4506                                                        hash_base=>"HEAD", file_name=>$file_name)},
4507                                         "HEAD"),
4508                 }
4509                 my $snapshot_links = format_snapshot_links($hash);
4510                 if (defined $snapshot_links) {
4511                         # FIXME: Should be available when we have no hash base as well.
4512                         push @views_nav, $snapshot_links;
4513                 }
4514                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4515                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4516         } else {
4517                 undef $hash_base;
4518                 print "<div class=\"page_nav\">\n";
4519                 print "<br/><br/></div>\n";
4520                 print "<div class=\"title\">$hash</div>\n";
4521         }
4522         if (defined $file_name) {
4523                 $basedir = $file_name;
4524                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4525                         $basedir .= '/';
4526                 }
4527         }
4528         git_print_page_path($file_name, 'tree', $hash_base);
4529         print "<div class=\"page_body\">\n";
4530         print "<table class=\"tree\">\n";
4531         my $alternate = 1;
4532         # '..' (top directory) link if possible
4533         if (defined $hash_base &&
4534             defined $file_name && $file_name =~ m![^/]+$!) {
4535                 if ($alternate) {
4536                         print "<tr class=\"dark\">\n";
4537                 } else {
4538                         print "<tr class=\"light\">\n";
4539                 }
4540                 $alternate ^= 1;
4541
4542                 my $up = $file_name;
4543                 $up =~ s!/?[^/]+$!!;
4544                 undef $up unless $up;
4545                 # based on git_print_tree_entry
4546                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4547                 print '<td class="list">';
4548                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4549                                              file_name=>$up)},
4550                               "..");
4551                 print "</td>\n";
4552                 print "<td class=\"link\"></td>\n";
4553
4554                 print "</tr>\n";
4555         }
4556         foreach my $line (@entries) {
4557                 my %t = parse_ls_tree_line($line, -z => 1);
4558
4559                 if ($alternate) {
4560                         print "<tr class=\"dark\">\n";
4561                 } else {
4562                         print "<tr class=\"light\">\n";
4563                 }
4564                 $alternate ^= 1;
4565
4566                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4567
4568                 print "</tr>\n";
4569         }
4570         print "</table>\n" .
4571               "</div>";
4572         git_footer_html();
4573 }
4574
4575 sub git_snapshot {
4576         my @supported_fmts = gitweb_check_feature('snapshot');
4577         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4578
4579         my $format = $cgi->param('sf');
4580         if (!@supported_fmts) {
4581                 die_error('403 Permission denied', "Permission denied");
4582         }
4583         # default to first supported snapshot format
4584         $format ||= $supported_fmts[0];
4585         if ($format !~ m/^[a-z0-9]+$/) {
4586                 die_error(undef, "Invalid snapshot format parameter");
4587         } elsif (!exists($known_snapshot_formats{$format})) {
4588                 die_error(undef, "Unknown snapshot format");
4589         } elsif (!grep($_ eq $format, @supported_fmts)) {
4590                 die_error(undef, "Unsupported snapshot format");
4591         }
4592
4593         if (!defined $hash) {
4594                 $hash = git_get_head_hash($project);
4595         }
4596
4597         my $name = $project;
4598         $name =~ s,([^/])/*\.git$,$1,;
4599         $name = basename($name);
4600         my $filename = to_utf8($name);
4601         $name =~ s/\047/\047\\\047\047/g;
4602         my $cmd;
4603         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4604         $cmd = quote_command(
4605                 git_cmd(), 'archive',
4606                 "--format=$known_snapshot_formats{$format}{'format'}",
4607                 "--prefix=$name/", $hash);
4608         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4609                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4610         }
4611
4612         print $cgi->header(
4613                 -type => $known_snapshot_formats{$format}{'type'},
4614                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4615                 -status => '200 OK');
4616
4617         open my $fd, "-|", $cmd
4618                 or die_error(undef, "Execute git-archive failed");
4619         binmode STDOUT, ':raw';
4620         print <$fd>;
4621         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4622         close $fd;
4623 }
4624
4625 sub git_log {
4626         my $head = git_get_head_hash($project);
4627         if (!defined $hash) {
4628                 $hash = $head;
4629         }
4630         if (!defined $page) {
4631                 $page = 0;
4632         }
4633         my $refs = git_get_references();
4634
4635         my @commitlist = parse_commits($hash, 101, (100 * $page));
4636
4637         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4638
4639         git_header_html();
4640         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4641
4642         if (!@commitlist) {
4643                 my %co = parse_commit($hash);
4644
4645                 git_print_header_div('summary', $project);
4646                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4647         }
4648         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4649         for (my $i = 0; $i <= $to; $i++) {
4650                 my %co = %{$commitlist[$i]};
4651                 next if !%co;
4652                 my $commit = $co{'id'};
4653                 my $ref = format_ref_marker($refs, $commit);
4654                 my %ad = parse_date($co{'author_epoch'});
4655                 git_print_header_div('commit',
4656                                "<span class=\"age\">$co{'age_string'}</span>" .
4657                                esc_html($co{'title'}) . $ref,
4658                                $commit);
4659                 print "<div class=\"title_text\">\n" .
4660                       "<div class=\"log_link\">\n" .
4661                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4662                       " | " .
4663                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4664                       " | " .
4665                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4666                       "<br/>\n" .
4667                       "</div>\n" .
4668                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4669                       "</div>\n";
4670
4671                 print "<div class=\"log_body\">\n";
4672                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4673                 print "</div>\n";
4674         }
4675         if ($#commitlist >= 100) {
4676                 print "<div class=\"page_nav\">\n";
4677                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4678                                -accesskey => "n", -title => "Alt-n"}, "next");
4679                 print "</div>\n";
4680         }
4681         git_footer_html();
4682 }
4683
4684 sub git_commit {
4685         $hash ||= $hash_base || "HEAD";
4686         my %co = parse_commit($hash);
4687         if (!%co) {
4688                 die_error(undef, "Unknown commit object");
4689         }
4690         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4691         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4692
4693         my $parent  = $co{'parent'};
4694         my $parents = $co{'parents'}; # listref
4695
4696         # we need to prepare $formats_nav before any parameter munging
4697         my $formats_nav;
4698         if (!defined $parent) {
4699                 # --root commitdiff
4700                 $formats_nav .= '(initial)';
4701         } elsif (@$parents == 1) {
4702                 # single parent commit
4703                 $formats_nav .=
4704                         '(parent: ' .
4705                         $cgi->a({-href => href(action=>"commit",
4706                                                hash=>$parent)},
4707                                 esc_html(substr($parent, 0, 7))) .
4708                         ')';
4709         } else {
4710                 # merge commit
4711                 $formats_nav .=
4712                         '(merge: ' .
4713                         join(' ', map {
4714                                 $cgi->a({-href => href(action=>"commit",
4715                                                        hash=>$_)},
4716                                         esc_html(substr($_, 0, 7)));
4717                         } @$parents ) .
4718                         ')';
4719         }
4720
4721         if (!defined $parent) {
4722                 $parent = "--root";
4723         }
4724         my @difftree;
4725         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4726                 @diff_opts,
4727                 (@$parents <= 1 ? $parent : '-c'),
4728                 $hash, "--"
4729                 or die_error(undef, "Open git-diff-tree failed");
4730         @difftree = map { chomp; $_ } <$fd>;
4731         close $fd or die_error(undef, "Reading git-diff-tree failed");
4732
4733         # non-textual hash id's can be cached
4734         my $expires;
4735         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4736                 $expires = "+1d";
4737         }
4738         my $refs = git_get_references();
4739         my $ref = format_ref_marker($refs, $co{'id'});
4740
4741         git_header_html(undef, $expires);
4742         git_print_page_nav('commit', '',
4743                            $hash, $co{'tree'}, $hash,
4744                            $formats_nav);
4745
4746         if (defined $co{'parent'}) {
4747                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4748         } else {
4749                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4750         }
4751         print "<div class=\"title_text\">\n" .
4752               "<table class=\"object_header\">\n";
4753         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4754               "<tr>" .
4755               "<td></td><td> $ad{'rfc2822'}";
4756         if ($ad{'hour_local'} < 6) {
4757                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4758                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4759         } else {
4760                 printf(" (%02d:%02d %s)",
4761                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4762         }
4763         print "</td>" .
4764               "</tr>\n";
4765         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4766         print "<tr><td></td><td> $cd{'rfc2822'}" .
4767               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4768               "</td></tr>\n";
4769         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4770         print "<tr>" .
4771               "<td>tree</td>" .
4772               "<td class=\"sha1\">" .
4773               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4774                        class => "list"}, $co{'tree'}) .
4775               "</td>" .
4776               "<td class=\"link\">" .
4777               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4778                       "tree");
4779         my $snapshot_links = format_snapshot_links($hash);
4780         if (defined $snapshot_links) {
4781                 print " | " . $snapshot_links;
4782         }
4783         print "</td>" .
4784               "</tr>\n";
4785
4786         foreach my $par (@$parents) {
4787                 print "<tr>" .
4788                       "<td>parent</td>" .
4789                       "<td class=\"sha1\">" .
4790                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4791                                class => "list"}, $par) .
4792                       "</td>" .
4793                       "<td class=\"link\">" .
4794                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4795                       " | " .
4796                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4797                       "</td>" .
4798                       "</tr>\n";
4799         }
4800         print "</table>".
4801               "</div>\n";
4802
4803         print "<div class=\"page_body\">\n";
4804         git_print_log($co{'comment'});
4805         print "</div>\n";
4806
4807         git_difftree_body(\@difftree, $hash, @$parents);
4808
4809         git_footer_html();
4810 }
4811
4812 sub git_object {
4813         # object is defined by:
4814         # - hash or hash_base alone
4815         # - hash_base and file_name
4816         my $type;
4817
4818         # - hash or hash_base alone
4819         if ($hash || ($hash_base && !defined $file_name)) {
4820                 my $object_id = $hash || $hash_base;
4821
4822                 open my $fd, "-|", quote_command(
4823                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4824                         or die_error('404 Not Found', "Object does not exist");
4825                 $type = <$fd>;
4826                 chomp $type;
4827                 close $fd
4828                         or die_error('404 Not Found', "Object does not exist");
4829
4830         # - hash_base and file_name
4831         } elsif ($hash_base && defined $file_name) {
4832                 $file_name =~ s,/+$,,;
4833
4834                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4835                         or die_error('404 Not Found', "Base object does not exist");
4836
4837                 # here errors should not hapen
4838                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4839                         or die_error(undef, "Open git-ls-tree failed");
4840                 my $line = <$fd>;
4841                 close $fd;
4842
4843                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4844                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4845                         die_error('404 Not Found', "File or directory for given base does not exist");
4846                 }
4847                 $type = $2;
4848                 $hash = $3;
4849         } else {
4850                 die_error('404 Not Found', "Not enough information to find object");
4851         }
4852
4853         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4854                                           hash=>$hash, hash_base=>$hash_base,
4855                                           file_name=>$file_name),
4856                              -status => '302 Found');
4857 }
4858
4859 sub git_blobdiff {
4860         my $format = shift || 'html';
4861
4862         my $fd;
4863         my @difftree;
4864         my %diffinfo;
4865         my $expires;
4866
4867         # preparing $fd and %diffinfo for git_patchset_body
4868         # new style URI
4869         if (defined $hash_base && defined $hash_parent_base) {
4870                 if (defined $file_name) {
4871                         # read raw output
4872                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4873                                 $hash_parent_base, $hash_base,
4874                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4875                                 or die_error(undef, "Open git-diff-tree failed");
4876                         @difftree = map { chomp; $_ } <$fd>;
4877                         close $fd
4878                                 or die_error(undef, "Reading git-diff-tree failed");
4879                         @difftree
4880                                 or die_error('404 Not Found', "Blob diff not found");
4881
4882                 } elsif (defined $hash &&
4883                          $hash =~ /[0-9a-fA-F]{40}/) {
4884                         # try to find filename from $hash
4885
4886                         # read filtered raw output
4887                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4888                                 $hash_parent_base, $hash_base, "--"
4889                                 or die_error(undef, "Open git-diff-tree failed");
4890                         @difftree =
4891                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4892                                 # $hash == to_id
4893                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4894                                 map { chomp; $_ } <$fd>;
4895                         close $fd
4896                                 or die_error(undef, "Reading git-diff-tree failed");
4897                         @difftree
4898                                 or die_error('404 Not Found', "Blob diff not found");
4899
4900                 } else {
4901                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4902                 }
4903
4904                 if (@difftree > 1) {
4905                         die_error('404 Not Found', "Ambiguous blob diff specification");
4906                 }
4907
4908                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4909                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4910                 $file_name   ||= $diffinfo{'to_file'};
4911
4912                 $hash_parent ||= $diffinfo{'from_id'};
4913                 $hash        ||= $diffinfo{'to_id'};
4914
4915                 # non-textual hash id's can be cached
4916                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4917                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4918                         $expires = '+1d';
4919                 }
4920
4921                 # open patch output
4922                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4923                         '-p', ($format eq 'html' ? "--full-index" : ()),
4924                         $hash_parent_base, $hash_base,
4925                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4926                         or die_error(undef, "Open git-diff-tree failed");
4927         }
4928
4929         # old/legacy style URI
4930         if (!%diffinfo && # if new style URI failed
4931             defined $hash && defined $hash_parent) {
4932                 # fake git-diff-tree raw output
4933                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4934                 $diffinfo{'from_id'} = $hash_parent;
4935                 $diffinfo{'to_id'}   = $hash;
4936                 if (defined $file_name) {
4937                         if (defined $file_parent) {
4938                                 $diffinfo{'status'} = '2';
4939                                 $diffinfo{'from_file'} = $file_parent;
4940                                 $diffinfo{'to_file'}   = $file_name;
4941                         } else { # assume not renamed
4942                                 $diffinfo{'status'} = '1';
4943                                 $diffinfo{'from_file'} = $file_name;
4944                                 $diffinfo{'to_file'}   = $file_name;
4945                         }
4946                 } else { # no filename given
4947                         $diffinfo{'status'} = '2';
4948                         $diffinfo{'from_file'} = $hash_parent;
4949                         $diffinfo{'to_file'}   = $hash;
4950                 }
4951
4952                 # non-textual hash id's can be cached
4953                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4954                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4955                         $expires = '+1d';
4956                 }
4957
4958                 # open patch output
4959                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4960                         '-p', ($format eq 'html' ? "--full-index" : ()),
4961                         $hash_parent, $hash, "--"
4962                         or die_error(undef, "Open git-diff failed");
4963         } else  {
4964                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4965                         unless %diffinfo;
4966         }
4967
4968         # header
4969         if ($format eq 'html') {
4970                 my $formats_nav =
4971                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
4972                                 "raw");
4973                 git_header_html(undef, $expires);
4974                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4975                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4976                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4977                 } else {
4978                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
4979                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
4980                 }
4981                 if (defined $file_name) {
4982                         git_print_page_path($file_name, "blob", $hash_base);
4983                 } else {
4984                         print "<div class=\"page_path\"></div>\n";
4985                 }
4986
4987         } elsif ($format eq 'plain') {
4988                 print $cgi->header(
4989                         -type => 'text/plain',
4990                         -charset => 'utf-8',
4991                         -expires => $expires,
4992                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
4993
4994                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
4995
4996         } else {
4997                 die_error(undef, "Unknown blobdiff format");
4998         }
4999
5000         # patch
5001         if ($format eq 'html') {
5002                 print "<div class=\"page_body\">\n";
5003
5004                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5005                 close $fd;
5006
5007                 print "</div>\n"; # class="page_body"
5008                 git_footer_html();
5009
5010         } else {
5011                 while (my $line = <$fd>) {
5012                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5013                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5014
5015                         print $line;
5016
5017                         last if $line =~ m!^\+\+\+!;
5018                 }
5019                 local $/ = undef;
5020                 print <$fd>;
5021                 close $fd;
5022         }
5023 }
5024
5025 sub git_blobdiff_plain {
5026         git_blobdiff('plain');
5027 }
5028
5029 sub git_commitdiff {
5030         my $format = shift || 'html';
5031         $hash ||= $hash_base || "HEAD";
5032         my %co = parse_commit($hash);
5033         if (!%co) {
5034                 die_error(undef, "Unknown commit object");
5035         }
5036
5037         # choose format for commitdiff for merge
5038         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5039                 $hash_parent = '--cc';
5040         }
5041         # we need to prepare $formats_nav before almost any parameter munging
5042         my $formats_nav;
5043         if ($format eq 'html') {
5044                 $formats_nav =
5045                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5046                                 "raw");
5047
5048                 if (defined $hash_parent &&
5049                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5050                         # commitdiff with two commits given
5051                         my $hash_parent_short = $hash_parent;
5052                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5053                                 $hash_parent_short = substr($hash_parent, 0, 7);
5054                         }
5055                         $formats_nav .=
5056                                 ' (from';
5057                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5058                                 if ($co{'parents'}[$i] eq $hash_parent) {
5059                                         $formats_nav .= ' parent ' . ($i+1);
5060                                         last;
5061                                 }
5062                         }
5063                         $formats_nav .= ': ' .
5064                                 $cgi->a({-href => href(action=>"commitdiff",
5065                                                        hash=>$hash_parent)},
5066                                         esc_html($hash_parent_short)) .
5067                                 ')';
5068                 } elsif (!$co{'parent'}) {
5069                         # --root commitdiff
5070                         $formats_nav .= ' (initial)';
5071                 } elsif (scalar @{$co{'parents'}} == 1) {
5072                         # single parent commit
5073                         $formats_nav .=
5074                                 ' (parent: ' .
5075                                 $cgi->a({-href => href(action=>"commitdiff",
5076                                                        hash=>$co{'parent'})},
5077                                         esc_html(substr($co{'parent'}, 0, 7))) .
5078                                 ')';
5079                 } else {
5080                         # merge commit
5081                         if ($hash_parent eq '--cc') {
5082                                 $formats_nav .= ' | ' .
5083                                         $cgi->a({-href => href(action=>"commitdiff",
5084                                                                hash=>$hash, hash_parent=>'-c')},
5085                                                 'combined');
5086                         } else { # $hash_parent eq '-c'
5087                                 $formats_nav .= ' | ' .
5088                                         $cgi->a({-href => href(action=>"commitdiff",
5089                                                                hash=>$hash, hash_parent=>'--cc')},
5090                                                 'compact');
5091                         }
5092                         $formats_nav .=
5093                                 ' (merge: ' .
5094                                 join(' ', map {
5095                                         $cgi->a({-href => href(action=>"commitdiff",
5096                                                                hash=>$_)},
5097                                                 esc_html(substr($_, 0, 7)));
5098                                 } @{$co{'parents'}} ) .
5099                                 ')';
5100                 }
5101         }
5102
5103         my $hash_parent_param = $hash_parent;
5104         if (!defined $hash_parent_param) {
5105                 # --cc for multiple parents, --root for parentless
5106                 $hash_parent_param =
5107                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5108         }
5109
5110         # read commitdiff
5111         my $fd;
5112         my @difftree;
5113         if ($format eq 'html') {
5114                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5115                         "--no-commit-id", "--patch-with-raw", "--full-index",
5116                         $hash_parent_param, $hash, "--"
5117                         or die_error(undef, "Open git-diff-tree failed");
5118
5119                 while (my $line = <$fd>) {
5120                         chomp $line;
5121                         # empty line ends raw part of diff-tree output
5122                         last unless $line;
5123                         push @difftree, scalar parse_difftree_raw_line($line);
5124                 }
5125
5126         } elsif ($format eq 'plain') {
5127                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5128                         '-p', $hash_parent_param, $hash, "--"
5129                         or die_error(undef, "Open git-diff-tree failed");
5130
5131         } else {
5132                 die_error(undef, "Unknown commitdiff format");
5133         }
5134
5135         # non-textual hash id's can be cached
5136         my $expires;
5137         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5138                 $expires = "+1d";
5139         }
5140
5141         # write commit message
5142         if ($format eq 'html') {
5143                 my $refs = git_get_references();
5144                 my $ref = format_ref_marker($refs, $co{'id'});
5145
5146                 git_header_html(undef, $expires);
5147                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5148                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5149                 git_print_authorship(\%co);
5150                 print "<div class=\"page_body\">\n";
5151                 if (@{$co{'comment'}} > 1) {
5152                         print "<div class=\"log\">\n";
5153                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5154                         print "</div>\n"; # class="log"
5155                 }
5156
5157         } elsif ($format eq 'plain') {
5158                 my $refs = git_get_references("tags");
5159                 my $tagname = git_get_rev_name_tags($hash);
5160                 my $filename = basename($project) . "-$hash.patch";
5161
5162                 print $cgi->header(
5163                         -type => 'text/plain',
5164                         -charset => 'utf-8',
5165                         -expires => $expires,
5166                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5167                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5168                 print "From: " . to_utf8($co{'author'}) . "\n";
5169                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5170                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5171
5172                 print "X-Git-Tag: $tagname\n" if $tagname;
5173                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5174
5175                 foreach my $line (@{$co{'comment'}}) {
5176                         print to_utf8($line) . "\n";
5177                 }
5178                 print "---\n\n";
5179         }
5180
5181         # write patch
5182         if ($format eq 'html') {
5183                 my $use_parents = !defined $hash_parent ||
5184                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5185                 git_difftree_body(\@difftree, $hash,
5186                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5187                 print "<br/>\n";
5188
5189                 git_patchset_body($fd, \@difftree, $hash,
5190                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5191                 close $fd;
5192                 print "</div>\n"; # class="page_body"
5193                 git_footer_html();
5194
5195         } elsif ($format eq 'plain') {
5196                 local $/ = undef;
5197                 print <$fd>;
5198                 close $fd
5199                         or print "Reading git-diff-tree failed\n";
5200         }
5201 }
5202
5203 sub git_commitdiff_plain {
5204         git_commitdiff('plain');
5205 }
5206
5207 sub git_history {
5208         if (!defined $hash_base) {
5209                 $hash_base = git_get_head_hash($project);
5210         }
5211         if (!defined $page) {
5212                 $page = 0;
5213         }
5214         my $ftype;
5215         my %co = parse_commit($hash_base);
5216         if (!%co) {
5217                 die_error(undef, "Unknown commit object");
5218         }
5219
5220         my $refs = git_get_references();
5221         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5222
5223         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5224                                        $file_name, "--full-history");
5225         if (!@commitlist) {
5226                 die_error('404 Not Found', "No such file or directory on given branch");
5227         }
5228
5229         if (!defined $hash && defined $file_name) {
5230                 # some commits could have deleted file in question,
5231                 # and not have it in tree, but one of them has to have it
5232                 for (my $i = 0; $i <= @commitlist; $i++) {
5233                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5234                         last if defined $hash;
5235                 }
5236         }
5237         if (defined $hash) {
5238                 $ftype = git_get_type($hash);
5239         }
5240         if (!defined $ftype) {
5241                 die_error(undef, "Unknown type of object");
5242         }
5243
5244         my $paging_nav = '';
5245         if ($page > 0) {
5246                 $paging_nav .=
5247                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5248                                                file_name=>$file_name)},
5249                                 "first");
5250                 $paging_nav .= " &sdot; " .
5251                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5252                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5253         } else {
5254                 $paging_nav .= "first";
5255                 $paging_nav .= " &sdot; prev";
5256         }
5257         my $next_link = '';
5258         if ($#commitlist >= 100) {
5259                 $next_link =
5260                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5261                                  -accesskey => "n", -title => "Alt-n"}, "next");
5262                 $paging_nav .= " &sdot; $next_link";
5263         } else {
5264                 $paging_nav .= " &sdot; next";
5265         }
5266
5267         git_header_html();
5268         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5269         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5270         git_print_page_path($file_name, $ftype, $hash_base);
5271
5272         git_history_body(\@commitlist, 0, 99,
5273                          $refs, $hash_base, $ftype, $next_link);
5274
5275         git_footer_html();
5276 }
5277
5278 sub git_search {
5279         my ($have_search) = gitweb_check_feature('search');
5280         if (!$have_search) {
5281                 die_error('403 Permission denied', "Permission denied");
5282         }
5283         if (!defined $searchtext) {
5284                 die_error(undef, "Text field empty");
5285         }
5286         if (!defined $hash) {
5287                 $hash = git_get_head_hash($project);
5288         }
5289         my %co = parse_commit($hash);
5290         if (!%co) {
5291                 die_error(undef, "Unknown commit object");
5292         }
5293         if (!defined $page) {
5294                 $page = 0;
5295         }
5296
5297         $searchtype ||= 'commit';
5298         if ($searchtype eq 'pickaxe') {
5299                 # pickaxe may take all resources of your box and run for several minutes
5300                 # with every query - so decide by yourself how public you make this feature
5301                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5302                 if (!$have_pickaxe) {
5303                         die_error('403 Permission denied', "Permission denied");
5304                 }
5305         }
5306         if ($searchtype eq 'grep') {
5307                 my ($have_grep) = gitweb_check_feature('grep');
5308                 if (!$have_grep) {
5309                         die_error('403 Permission denied', "Permission denied");
5310                 }
5311         }
5312
5313         git_header_html();
5314
5315         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5316                 my $greptype;
5317                 if ($searchtype eq 'commit') {
5318                         $greptype = "--grep=";
5319                 } elsif ($searchtype eq 'author') {
5320                         $greptype = "--author=";
5321                 } elsif ($searchtype eq 'committer') {
5322                         $greptype = "--committer=";
5323                 }
5324                 $greptype .= $searchtext;
5325                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5326                                                $greptype, '--regexp-ignore-case',
5327                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5328
5329                 my $paging_nav = '';
5330                 if ($page > 0) {
5331                         $paging_nav .=
5332                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5333                                                        searchtext=>$searchtext,
5334                                                        searchtype=>$searchtype)},
5335                                         "first");
5336                         $paging_nav .= " &sdot; " .
5337                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5338                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5339                 } else {
5340                         $paging_nav .= "first";
5341                         $paging_nav .= " &sdot; prev";
5342                 }
5343                 my $next_link = '';
5344                 if ($#commitlist >= 100) {
5345                         $next_link =
5346                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5347                                          -accesskey => "n", -title => "Alt-n"}, "next");
5348                         $paging_nav .= " &sdot; $next_link";
5349                 } else {
5350                         $paging_nav .= " &sdot; next";
5351                 }
5352
5353                 if ($#commitlist >= 100) {
5354                 }
5355
5356                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5357                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5358                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5359         }
5360
5361         if ($searchtype eq 'pickaxe') {
5362                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5363                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5364
5365                 print "<table class=\"pickaxe search\">\n";
5366                 my $alternate = 1;
5367                 $/ = "\n";
5368                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5369                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5370                         ($search_use_regexp ? '--pickaxe-regex' : ());
5371                 undef %co;
5372                 my @files;
5373                 while (my $line = <$fd>) {
5374                         chomp $line;
5375                         next unless $line;
5376
5377                         my %set = parse_difftree_raw_line($line);
5378                         if (defined $set{'commit'}) {
5379                                 # finish previous commit
5380                                 if (%co) {
5381                                         print "</td>\n" .
5382                                               "<td class=\"link\">" .
5383                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5384                                               " | " .
5385                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5386                                         print "</td>\n" .
5387                                               "</tr>\n";
5388                                 }
5389
5390                                 if ($alternate) {
5391                                         print "<tr class=\"dark\">\n";
5392                                 } else {
5393                                         print "<tr class=\"light\">\n";
5394                                 }
5395                                 $alternate ^= 1;
5396                                 %co = parse_commit($set{'commit'});
5397                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5398                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5399                                       "<td><i>$author</i></td>\n" .
5400                                       "<td>" .
5401                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5402                                               -class => "list subject"},
5403                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5404                         } elsif (defined $set{'to_id'}) {
5405                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5406
5407                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5408                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5409                                               -class => "list"},
5410                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5411                                       "<br/>\n";
5412                         }
5413                 }
5414                 close $fd;
5415
5416                 # finish last commit (warning: repetition!)
5417                 if (%co) {
5418                         print "</td>\n" .
5419                               "<td class=\"link\">" .
5420                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5421                               " | " .
5422                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5423                         print "</td>\n" .
5424                               "</tr>\n";
5425                 }
5426
5427                 print "</table>\n";
5428         }
5429
5430         if ($searchtype eq 'grep') {
5431                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5432                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5433
5434                 print "<table class=\"grep_search\">\n";
5435                 my $alternate = 1;
5436                 my $matches = 0;
5437                 $/ = "\n";
5438                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5439                         $search_use_regexp ? ('-E', '-i') : '-F',
5440                         $searchtext, $co{'tree'};
5441                 my $lastfile = '';
5442                 while (my $line = <$fd>) {
5443                         chomp $line;
5444                         my ($file, $lno, $ltext, $binary);
5445                         last if ($matches++ > 1000);
5446                         if ($line =~ /^Binary file (.+) matches$/) {
5447                                 $file = $1;
5448                                 $binary = 1;
5449                         } else {
5450                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5451                         }
5452                         if ($file ne $lastfile) {
5453                                 $lastfile and print "</td></tr>\n";
5454                                 if ($alternate++) {
5455                                         print "<tr class=\"dark\">\n";
5456                                 } else {
5457                                         print "<tr class=\"light\">\n";
5458                                 }
5459                                 print "<td class=\"list\">".
5460                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5461                                                                file_name=>"$file"),
5462                                                 -class => "list"}, esc_path($file));
5463                                 print "</td><td>\n";
5464                                 $lastfile = $file;
5465                         }
5466                         if ($binary) {
5467                                 print "<div class=\"binary\">Binary file</div>\n";
5468                         } else {
5469                                 $ltext = untabify($ltext);
5470                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5471                                         $ltext = esc_html($1, -nbsp=>1);
5472                                         $ltext .= '<span class="match">';
5473                                         $ltext .= esc_html($2, -nbsp=>1);
5474                                         $ltext .= '</span>';
5475                                         $ltext .= esc_html($3, -nbsp=>1);
5476                                 } else {
5477                                         $ltext = esc_html($ltext, -nbsp=>1);
5478                                 }
5479                                 print "<div class=\"pre\">" .
5480                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5481                                                                file_name=>"$file").'#l'.$lno,
5482                                                 -class => "linenr"}, sprintf('%4i', $lno))
5483                                         . ' ' .  $ltext . "</div>\n";
5484                         }
5485                 }
5486                 if ($lastfile) {
5487                         print "</td></tr>\n";
5488                         if ($matches > 1000) {
5489                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5490                         }
5491                 } else {
5492                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5493                 }
5494                 close $fd;
5495
5496                 print "</table>\n";
5497         }
5498         git_footer_html();
5499 }
5500
5501 sub git_search_help {
5502         git_header_html();
5503         git_print_page_nav('','', $hash,$hash,$hash);
5504         print <<EOT;
5505 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5506 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5507 the pattern entered is recognized as the POSIX extended
5508 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5509 insensitive).</p>
5510 <dl>
5511 <dt><b>commit</b></dt>
5512 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5513 EOT
5514         my ($have_grep) = gitweb_check_feature('grep');
5515         if ($have_grep) {
5516                 print <<EOT;
5517 <dt><b>grep</b></dt>
5518 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5519     a different one) are searched for the given pattern. On large trees, this search can take
5520 a while and put some strain on the server, so please use it with some consideration. Note that
5521 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5522 case-sensitive.</dd>
5523 EOT
5524         }
5525         print <<EOT;
5526 <dt><b>author</b></dt>
5527 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5528 <dt><b>committer</b></dt>
5529 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5530 EOT
5531         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5532         if ($have_pickaxe) {
5533                 print <<EOT;
5534 <dt><b>pickaxe</b></dt>
5535 <dd>All commits that caused the string to appear or disappear from any file (changes that
5536 added, removed or "modified" the string) will be listed. This search can take a while and
5537 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5538 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5539 EOT
5540         }
5541         print "</dl>\n";
5542         git_footer_html();
5543 }
5544
5545 sub git_shortlog {
5546         my $head = git_get_head_hash($project);
5547         if (!defined $hash) {
5548                 $hash = $head;
5549         }
5550         if (!defined $page) {
5551                 $page = 0;
5552         }
5553         my $refs = git_get_references();
5554
5555         my @commitlist = parse_commits($hash, 101, (100 * $page));
5556
5557         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5558         my $next_link = '';
5559         if ($#commitlist >= 100) {
5560                 $next_link =
5561                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5562                                  -accesskey => "n", -title => "Alt-n"}, "next");
5563         }
5564
5565         git_header_html();
5566         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5567         git_print_header_div('summary', $project);
5568
5569         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5570
5571         git_footer_html();
5572 }
5573
5574 ## ......................................................................
5575 ## feeds (RSS, Atom; OPML)
5576
5577 sub git_feed {
5578         my $format = shift || 'atom';
5579         my ($have_blame) = gitweb_check_feature('blame');
5580
5581         # Atom: http://www.atomenabled.org/developers/syndication/
5582         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5583         if ($format ne 'rss' && $format ne 'atom') {
5584                 die_error(undef, "Unknown web feed format");
5585         }
5586
5587         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5588         my $head = $hash || 'HEAD';
5589         my @commitlist = parse_commits($head, 150, 0, $file_name);
5590
5591         my %latest_commit;
5592         my %latest_date;
5593         my $content_type = "application/$format+xml";
5594         if (defined $cgi->http('HTTP_ACCEPT') &&
5595                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5596                 # browser (feed reader) prefers text/xml
5597                 $content_type = 'text/xml';
5598         }
5599         if (defined($commitlist[0])) {
5600                 %latest_commit = %{$commitlist[0]};
5601                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5602                 print $cgi->header(
5603                         -type => $content_type,
5604                         -charset => 'utf-8',
5605                         -last_modified => $latest_date{'rfc2822'});
5606         } else {
5607                 print $cgi->header(
5608                         -type => $content_type,
5609                         -charset => 'utf-8');
5610         }
5611
5612         # Optimization: skip generating the body if client asks only
5613         # for Last-Modified date.
5614         return if ($cgi->request_method() eq 'HEAD');
5615
5616         # header variables
5617         my $title = "$site_name - $project/$action";
5618         my $feed_type = 'log';
5619         if (defined $hash) {
5620                 $title .= " - '$hash'";
5621                 $feed_type = 'branch log';
5622                 if (defined $file_name) {
5623                         $title .= " :: $file_name";
5624                         $feed_type = 'history';
5625                 }
5626         } elsif (defined $file_name) {
5627                 $title .= " - $file_name";
5628                 $feed_type = 'history';
5629         }
5630         $title .= " $feed_type";
5631         my $descr = git_get_project_description($project);
5632         if (defined $descr) {
5633                 $descr = esc_html($descr);
5634         } else {
5635                 $descr = "$project " .
5636                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5637                          " feed";
5638         }
5639         my $owner = git_get_project_owner($project);
5640         $owner = esc_html($owner);
5641
5642         #header
5643         my $alt_url;
5644         if (defined $file_name) {
5645                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5646         } elsif (defined $hash) {
5647                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5648         } else {
5649                 $alt_url = href(-full=>1, action=>"summary");
5650         }
5651         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5652         if ($format eq 'rss') {
5653                 print <<XML;
5654 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5655 <channel>
5656 XML
5657                 print "<title>$title</title>\n" .
5658                       "<link>$alt_url</link>\n" .
5659                       "<description>$descr</description>\n" .
5660                       "<language>en</language>\n";
5661         } elsif ($format eq 'atom') {
5662                 print <<XML;
5663 <feed xmlns="http://www.w3.org/2005/Atom">
5664 XML
5665                 print "<title>$title</title>\n" .
5666                       "<subtitle>$descr</subtitle>\n" .
5667                       '<link rel="alternate" type="text/html" href="' .
5668                       $alt_url . '" />' . "\n" .
5669                       '<link rel="self" type="' . $content_type . '" href="' .
5670                       $cgi->self_url() . '" />' . "\n" .
5671                       "<id>" . href(-full=>1) . "</id>\n" .
5672                       # use project owner for feed author
5673                       "<author><name>$owner</name></author>\n";
5674                 if (defined $favicon) {
5675                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5676                 }
5677                 if (defined $logo_url) {
5678                         # not twice as wide as tall: 72 x 27 pixels
5679                         print "<logo>" . esc_url($logo) . "</logo>\n";
5680                 }
5681                 if (! %latest_date) {
5682                         # dummy date to keep the feed valid until commits trickle in:
5683                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5684                 } else {
5685                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5686                 }
5687         }
5688
5689         # contents
5690         for (my $i = 0; $i <= $#commitlist; $i++) {
5691                 my %co = %{$commitlist[$i]};
5692                 my $commit = $co{'id'};
5693                 # we read 150, we always show 30 and the ones more recent than 48 hours
5694                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5695                         last;
5696                 }
5697                 my %cd = parse_date($co{'author_epoch'});
5698
5699                 # get list of changed files
5700                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5701                         $co{'parent'} || "--root",
5702                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5703                         or next;
5704                 my @difftree = map { chomp; $_ } <$fd>;
5705                 close $fd
5706                         or next;
5707
5708                 # print element (entry, item)
5709                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5710                 if ($format eq 'rss') {
5711                         print "<item>\n" .
5712                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5713                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5714                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5715                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5716                               "<link>$co_url</link>\n" .
5717                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5718                               "<content:encoded>" .
5719                               "<![CDATA[\n";
5720                 } elsif ($format eq 'atom') {
5721                         print "<entry>\n" .
5722                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5723                               "<updated>$cd{'iso-8601'}</updated>\n" .
5724                               "<author>\n" .
5725                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5726                         if ($co{'author_email'}) {
5727                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5728                         }
5729                         print "</author>\n" .
5730                               # use committer for contributor
5731                               "<contributor>\n" .
5732                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5733                         if ($co{'committer_email'}) {
5734                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5735                         }
5736                         print "</contributor>\n" .
5737                               "<published>$cd{'iso-8601'}</published>\n" .
5738                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5739                               "<id>$co_url</id>\n" .
5740                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5741                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5742                 }
5743                 my $comment = $co{'comment'};
5744                 print "<pre>\n";
5745                 foreach my $line (@$comment) {
5746                         $line = esc_html($line);
5747                         print "$line\n";
5748                 }
5749                 print "</pre><ul>\n";
5750                 foreach my $difftree_line (@difftree) {
5751                         my %difftree = parse_difftree_raw_line($difftree_line);
5752                         next if !$difftree{'from_id'};
5753
5754                         my $file = $difftree{'file'} || $difftree{'to_file'};
5755
5756                         print "<li>" .
5757                               "[" .
5758                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5759                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5760                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5761                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5762                                       -title => "diff"}, 'D');
5763                         if ($have_blame) {
5764                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5765                                                              file_name=>$file, hash_base=>$commit),
5766                                               -title => "blame"}, 'B');
5767                         }
5768                         # if this is not a feed of a file history
5769                         if (!defined $file_name || $file_name ne $file) {
5770                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5771                                                              file_name=>$file, hash=>$commit),
5772                                               -title => "history"}, 'H');
5773                         }
5774                         $file = esc_path($file);
5775                         print "] ".
5776                               "$file</li>\n";
5777                 }
5778                 if ($format eq 'rss') {
5779                         print "</ul>]]>\n" .
5780                               "</content:encoded>\n" .
5781                               "</item>\n";
5782                 } elsif ($format eq 'atom') {
5783                         print "</ul>\n</div>\n" .
5784                               "</content>\n" .
5785                               "</entry>\n";
5786                 }
5787         }
5788
5789         # end of feed
5790         if ($format eq 'rss') {
5791                 print "</channel>\n</rss>\n";
5792         }       elsif ($format eq 'atom') {
5793                 print "</feed>\n";
5794         }
5795 }
5796
5797 sub git_rss {
5798         git_feed('rss');
5799 }
5800
5801 sub git_atom {
5802         git_feed('atom');
5803 }
5804
5805 sub git_opml {
5806         my @list = git_get_projects_list();
5807
5808         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5809         print <<XML;
5810 <?xml version="1.0" encoding="utf-8"?>
5811 <opml version="1.0">
5812 <head>
5813   <title>$site_name OPML Export</title>
5814 </head>
5815 <body>
5816 <outline text="git RSS feeds">
5817 XML
5818
5819         foreach my $pr (@list) {
5820                 my %proj = %$pr;
5821                 my $head = git_get_head_hash($proj{'path'});
5822                 if (!defined $head) {
5823                         next;
5824                 }
5825                 $git_dir = "$projectroot/$proj{'path'}";
5826                 my %co = parse_commit($head);
5827                 if (!%co) {
5828                         next;
5829                 }
5830
5831                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5832                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5833                 my $html = "$my_url?p=$proj{'path'};a=summary";
5834                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5835         }
5836         print <<XML;
5837 </outline>
5838 </body>
5839 </opml>
5840 XML
5841 }