git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # core git executable to use
  31 # this can just be "git" if your webserver has a sensible PATH
  32 our $GIT = "++GIT_BINDIR++/git";
  33
  34 # absolute fs-path which will be prepended to the project path
  35 #our $projectroot = "/pub/scm";
  36 our $projectroot = "++GITWEB_PROJECTROOT++";
  37
  38 # fs traversing limit for getting project list
  39 # the number is relative to the projectroot
  40 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  41
  42 # target of the home link on top of all pages
  43 our $home_link = $my_uri || "/";
  44
  45 # string of the home link on top of all pages
  46 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  47
  48 # name of your site or organization to appear in page titles
  49 # replace this with something more descriptive for clearer bookmarks
  50 our $site_name = "++GITWEB_SITENAME++"
  51                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  52
  53 # filename of html text to include at top of each page
  54 our $site_header = "++GITWEB_SITE_HEADER++";
  55 # html text to include at home page
  56 our $home_text = "++GITWEB_HOMETEXT++";
  57 # filename of html text to include at bottom of each page
  58 our $site_footer = "++GITWEB_SITE_FOOTER++";
  59
  60 # URI of stylesheets
  61 our @stylesheets = ("++GITWEB_CSS++");
  62 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  63 our $stylesheet = undef;
  64 # URI of GIT logo (72x27 size)
  65 our $logo = "++GITWEB_LOGO++";
  66 # URI of GIT favicon, assumed to be image/png type
  67 our $favicon = "++GITWEB_FAVICON++";
  68
  69 # URI and label (title) of GIT logo link
  70 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  71 #our $logo_label = "git documentation";
  72 our $logo_url = "http://git.or.cz/";
  73 our $logo_label = "git homepage";
  74
  75 # source of projects list
  76 our $projects_list = "++GITWEB_LIST++";
  77
  78 # the width (in characters) of the projects list "Description" column
  79 our $projects_list_description_width = 25;
  80
  81 # default order of projects list
  82 # valid values are none, project, descr, owner, and age
  83 our $default_projects_order = "project";
  84
  85 # show repository only if this file exists
  86 # (only effective if this variable evaluates to true)
  87 our $export_ok = "++GITWEB_EXPORT_OK++";
  88
  89 # only allow viewing of repositories also shown on the overview page
  90 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  91
  92 # list of git base URLs used for URL to where fetch project from,
  93 # i.e. full URL is "$git_base_url/$project"
  94 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
  95
  96 # default blob_plain mimetype and default charset for text/plain blob
  97 our $default_blob_plain_mimetype = 'text/plain';
  98 our $default_text_plain_charset  = undef;
  99
 100 # file to use for guessing MIME types before trying /etc/mime.types
 101 # (relative to the current git repository)
 102 our $mimetypes_file = undef;
 103
 104 # assume this charset if line contains non-UTF-8 characters;
 105 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 106 # for which encoding all byte sequences are valid, for example
 107 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 108 # could be even 'utf-8' for the old behavior)
 109 our $fallback_encoding = 'latin1';
 110
 111 # rename detection options for git-diff and git-diff-tree
 112 # - default is '-M', with the cost proportional to
 113 #   (number of removed files) * (number of new files).
 114 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 115 #   (number of changed files + number of removed files) * (number of new files)
 116 # - even more costly is '-C', '--find-copies-harder' with cost
 117 #   (number of files in the original tree) * (number of new files)
 118 # - one might want to include '-B' option, e.g. '-B', '-M'
 119 our @diff_opts = ('-M'); # taken from git_commit
 120
 121 # information about snapshot formats that gitweb is capable of serving
 122 our %known_snapshot_formats = (
 123         # name => {
 124         #       'display' => display name,
 125         #       'type' => mime type,
 126         #       'suffix' => filename suffix,
 127         #       'format' => --format for git-archive,
 128         #       'compressor' => [compressor command and arguments]
 129         #                       (array reference, optional)}
 130         #
 131         'tgz' => {
 132                 'display' => 'tar.gz',
 133                 'type' => 'application/x-gzip',
 134                 'suffix' => '.tar.gz',
 135                 'format' => 'tar',
 136                 'compressor' => ['gzip']},
 137
 138         'tbz2' => {
 139                 'display' => 'tar.bz2',
 140                 'type' => 'application/x-bzip2',
 141                 'suffix' => '.tar.bz2',
 142                 'format' => 'tar',
 143                 'compressor' => ['bzip2']},
 144
 145         'zip' => {
 146                 'display' => 'zip',
 147                 'type' => 'application/x-zip',
 148                 'suffix' => '.zip',
 149                 'format' => 'zip'},
 150 );
 151
 152 # Aliases so we understand old gitweb.snapshot values in repository
 153 # configuration.
 154 our %known_snapshot_format_aliases = (
 155         'gzip'  => 'tgz',
 156         'bzip2' => 'tbz2',
 157
 158         # backward compatibility: legacy gitweb config support
 159         'x-gzip' => undef, 'gz' => undef,
 160         'x-bzip2' => undef, 'bz2' => undef,
 161         'x-zip' => undef, '' => undef,
 162 );
 163
 164 # You define site-wide feature defaults here; override them with
 165 # $GITWEB_CONFIG as necessary.
 166 our %feature = (
 167         # feature => {
 168         #       'sub' => feature-sub (subroutine),
 169         #       'override' => allow-override (boolean),
 170         #       'default' => [ default options...] (array reference)}
 171         #
 172         # if feature is overridable (it means that allow-override has true value),
 173         # then feature-sub will be called with default options as parameters;
 174         # return value of feature-sub indicates if to enable specified feature
 175         #
 176         # if there is no 'sub' key (no feature-sub), then feature cannot be
 177         # overriden
 178         #
 179         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 180
 181         # Enable the 'blame' blob view, showing the last commit that modified
 182         # each line in the file. This can be very CPU-intensive.
 183
 184         # To enable system wide have in $GITWEB_CONFIG
 185         # $feature{'blame'}{'default'} = [1];
 186         # To have project specific config enable override in $GITWEB_CONFIG
 187         # $feature{'blame'}{'override'} = 1;
 188         # and in project config gitweb.blame = 0|1;
 189         'blame' => {
 190                 'sub' => \&feature_blame,
 191                 'override' => 0,
 192                 'default' => [0]},
 193
 194         # Enable the 'snapshot' link, providing a compressed archive of any
 195         # tree. This can potentially generate high traffic if you have large
 196         # project.
 197
 198         # Value is a list of formats defined in %known_snapshot_formats that
 199         # you wish to offer.
 200         # To disable system wide have in $GITWEB_CONFIG
 201         # $feature{'snapshot'}{'default'} = [];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'snapshot'}{'override'} = 1;
 204         # and in project config, a comma-separated list of formats or "none"
 205         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 206         'snapshot' => {
 207                 'sub' => \&feature_snapshot,
 208                 'override' => 0,
 209                 'default' => ['tgz']},
 210
 211         # Enable text search, which will list the commits which match author,
 212         # committer or commit text to a given string.  Enabled by default.
 213         # Project specific override is not supported.
 214         'search' => {
 215                 'override' => 0,
 216                 'default' => [1]},
 217
 218         # Enable grep search, which will list the files in currently selected
 219         # tree containing the given string. Enabled by default. This can be
 220         # potentially CPU-intensive, of course.
 221
 222         # To enable system wide have in $GITWEB_CONFIG
 223         # $feature{'grep'}{'default'} = [1];
 224         # To have project specific config enable override in $GITWEB_CONFIG
 225         # $feature{'grep'}{'override'} = 1;
 226         # and in project config gitweb.grep = 0|1;
 227         'grep' => {
 228                 'override' => 0,
 229                 'default' => [1]},
 230
 231         # Enable the pickaxe search, which will list the commits that modified
 232         # a given string in a file. This can be practical and quite faster
 233         # alternative to 'blame', but still potentially CPU-intensive.
 234
 235         # To enable system wide have in $GITWEB_CONFIG
 236         # $feature{'pickaxe'}{'default'} = [1];
 237         # To have project specific config enable override in $GITWEB_CONFIG
 238         # $feature{'pickaxe'}{'override'} = 1;
 239         # and in project config gitweb.pickaxe = 0|1;
 240         'pickaxe' => {
 241                 'sub' => \&feature_pickaxe,
 242                 'override' => 0,
 243                 'default' => [1]},
 244
 245         # Make gitweb use an alternative format of the URLs which can be
 246         # more readable and natural-looking: project name is embedded
 247         # directly in the path and the query string contains other
 248         # auxiliary information. All gitweb installations recognize
 249         # URL in either format; this configures in which formats gitweb
 250         # generates links.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pathinfo'}{'default'} = [1];
 254         # Project specific override is not supported.
 255
 256         # Note that you will need to change the default location of CSS,
 257         # favicon, logo and possibly other files to an absolute URL. Also,
 258         # if gitweb.cgi serves as your indexfile, you will need to force
 259         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 260         'pathinfo' => {
 261                 'override' => 0,
 262                 'default' => [0]},
 263
 264         # Make gitweb consider projects in project root subdirectories
 265         # to be forks of existing projects. Given project $projname.git,
 266         # projects matching $projname/*.git will not be shown in the main
 267         # projects list, instead a '+' mark will be added to $projname
 268         # there and a 'forks' view will be enabled for the project, listing
 269         # all the forks. If project list is taken from a file, forks have
 270         # to be listed after the main project.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'forks'}{'default'} = [1];
 274         # Project specific override is not supported.
 275         'forks' => {
 276                 'override' => 0,
 277                 'default' => [0]},
 278 );
 279
 280 sub gitweb_check_feature {
 281         my ($name) = @_;
 282         return unless exists $feature{$name};
 283         my ($sub, $override, @defaults) = (
 284                 $feature{$name}{'sub'},
 285                 $feature{$name}{'override'},
 286                 @{$feature{$name}{'default'}});
 287         if (!$override) { return @defaults; }
 288         if (!defined $sub) {
 289                 warn "feature $name is not overrideable";
 290                 return @defaults;
 291         }
 292         return $sub->(@defaults);
 293 }
 294
 295 sub feature_blame {
 296         my ($val) = git_get_project_config('blame', '--bool');
 297
 298         if ($val eq 'true') {
 299                 return 1;
 300         } elsif ($val eq 'false') {
 301                 return 0;
 302         }
 303
 304         return $_[0];
 305 }
 306
 307 sub feature_snapshot {
 308         my (@fmts) = @_;
 309
 310         my ($val) = git_get_project_config('snapshot');
 311
 312         if ($val) {
 313                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 314         }
 315
 316         return @fmts;
 317 }
 318
 319 sub feature_grep {
 320         my ($val) = git_get_project_config('grep', '--bool');
 321
 322         if ($val eq 'true') {
 323                 return (1);
 324         } elsif ($val eq 'false') {
 325                 return (0);
 326         }
 327
 328         return ($_[0]);
 329 }
 330
 331 sub feature_pickaxe {
 332         my ($val) = git_get_project_config('pickaxe', '--bool');
 333
 334         if ($val eq 'true') {
 335                 return (1);
 336         } elsif ($val eq 'false') {
 337                 return (0);
 338         }
 339
 340         return ($_[0]);
 341 }
 342
 343 # checking HEAD file with -e is fragile if the repository was
 344 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 345 # and then pruned.
 346 sub check_head_link {
 347         my ($dir) = @_;
 348         my $headfile = "$dir/HEAD";
 349         return ((-e $headfile) ||
 350                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 351 }
 352
 353 sub check_export_ok {
 354         my ($dir) = @_;
 355         return (check_head_link($dir) &&
 356                 (!$export_ok || -e "$dir/$export_ok"));
 357 }
 358
 359 # process alternate names for backward compatibility
 360 # filter out unsupported (unknown) snapshot formats
 361 sub filter_snapshot_fmts {
 362         my @fmts = @_;
 363
 364         @fmts = map {
 365                 exists $known_snapshot_format_aliases{$_} ?
 366                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 367         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 368
 369 }
 370
 371 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 372 if (-e $GITWEB_CONFIG) {
 373         do $GITWEB_CONFIG;
 374 } else {
 375         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 376         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 377 }
 378
 379 # version of the core git binary
 380 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 381
 382 $projects_list ||= $projectroot;
 383
 384 # ======================================================================
 385 # input validation and dispatch
 386 our $action = $cgi->param('a');
 387 if (defined $action) {
 388         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 389                 die_error(undef, "Invalid action parameter");
 390         }
 391 }
 392
 393 # parameters which are pathnames
 394 our $project = $cgi->param('p');
 395 if (defined $project) {
 396         if (!validate_pathname($project) ||
 397             !(-d "$projectroot/$project") ||
 398             !check_head_link("$projectroot/$project") ||
 399             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 400             ($strict_export && !project_in_list($project))) {
 401                 undef $project;
 402                 die_error(undef, "No such project");
 403         }
 404 }
 405
 406 our $file_name = $cgi->param('f');
 407 if (defined $file_name) {
 408         if (!validate_pathname($file_name)) {
 409                 die_error(undef, "Invalid file parameter");
 410         }
 411 }
 412
 413 our $file_parent = $cgi->param('fp');
 414 if (defined $file_parent) {
 415         if (!validate_pathname($file_parent)) {
 416                 die_error(undef, "Invalid file parent parameter");
 417         }
 418 }
 419
 420 # parameters which are refnames
 421 our $hash = $cgi->param('h');
 422 if (defined $hash) {
 423         if (!validate_refname($hash)) {
 424                 die_error(undef, "Invalid hash parameter");
 425         }
 426 }
 427
 428 our $hash_parent = $cgi->param('hp');
 429 if (defined $hash_parent) {
 430         if (!validate_refname($hash_parent)) {
 431                 die_error(undef, "Invalid hash parent parameter");
 432         }
 433 }
 434
 435 our $hash_base = $cgi->param('hb');
 436 if (defined $hash_base) {
 437         if (!validate_refname($hash_base)) {
 438                 die_error(undef, "Invalid hash base parameter");
 439         }
 440 }
 441
 442 my %allowed_options = (
 443         "--no-merges" => [ qw(rss atom log shortlog history) ],
 444 );
 445
 446 our @extra_options = $cgi->param('opt');
 447 if (defined @extra_options) {
 448         foreach my $opt (@extra_options) {
 449                 if (not exists $allowed_options{$opt}) {
 450                         die_error(undef, "Invalid option parameter");
 451                 }
 452                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 453                         die_error(undef, "Invalid option parameter for this action");
 454                 }
 455         }
 456 }
 457
 458 our $hash_parent_base = $cgi->param('hpb');
 459 if (defined $hash_parent_base) {
 460         if (!validate_refname($hash_parent_base)) {
 461                 die_error(undef, "Invalid hash parent base parameter");
 462         }
 463 }
 464
 465 # other parameters
 466 our $page = $cgi->param('pg');
 467 if (defined $page) {
 468         if ($page =~ m/[^0-9]/) {
 469                 die_error(undef, "Invalid page parameter");
 470         }
 471 }
 472
 473 our $searchtype = $cgi->param('st');
 474 if (defined $searchtype) {
 475         if ($searchtype =~ m/[^a-z]/) {
 476                 die_error(undef, "Invalid searchtype parameter");
 477         }
 478 }
 479
 480 our $search_use_regexp = $cgi->param('sr');
 481
 482 our $searchtext = $cgi->param('s');
 483 our $search_regexp;
 484 if (defined $searchtext) {
 485         if (length($searchtext) < 2) {
 486                 die_error(undef, "At least two characters are required for search parameter");
 487         }
 488         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 489 }
 490
 491 # now read PATH_INFO and use it as alternative to parameters
 492 sub evaluate_path_info {
 493         return if defined $project;
 494         my $path_info = $ENV{"PATH_INFO"};
 495         return if !$path_info;
 496         $path_info =~ s,^/+,,;
 497         return if !$path_info;
 498         # find which part of PATH_INFO is project
 499         $project = $path_info;
 500         $project =~ s,/+$,,;
 501         while ($project && !check_head_link("$projectroot/$project")) {
 502                 $project =~ s,/*[^/]*$,,;
 503         }
 504         # validate project
 505         $project = validate_pathname($project);
 506         if (!$project ||
 507             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 508             ($strict_export && !project_in_list($project))) {
 509                 undef $project;
 510                 return;
 511         }
 512         # do not change any parameters if an action is given using the query string
 513         return if $action;
 514         $path_info =~ s,^\Q$project\E/*,,;
 515         my ($refname, $pathname) = split(/:/, $path_info, 2);
 516         if (defined $pathname) {
 517                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 518                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 519                 $pathname =~ s,^/+,,;
 520                 if (!$pathname || substr($pathname, -1) eq "/") {
 521                         $action  ||= "tree";
 522                         $pathname =~ s,/$,,;
 523                 } else {
 524                         $action  ||= "blob_plain";
 525                 }
 526                 $hash_base ||= validate_refname($refname);
 527                 $file_name ||= validate_pathname($pathname);
 528         } elsif (defined $refname) {
 529                 # we got "project.git/branch"
 530                 $action ||= "shortlog";
 531                 $hash   ||= validate_refname($refname);
 532         }
 533 }
 534 evaluate_path_info();
 535
 536 # path to the current git repository
 537 our $git_dir;
 538 $git_dir = "$projectroot/$project" if $project;
 539
 540 # dispatch
 541 my %actions = (
 542         "blame" => \&git_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 # returns path to the core git executable and the --git-dir parameter as string
1504 sub git_cmd_str {
1505         return join(' ', git_cmd());
1506 }
1507
1508 # get HEAD ref of given project as hash
1509 sub git_get_head_hash {
1510         my $project = shift;
1511         my $o_git_dir = $git_dir;
1512         my $retval = undef;
1513         $git_dir = "$projectroot/$project";
1514         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1515                 my $head = <$fd>;
1516                 close $fd;
1517                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1518                         $retval = $1;
1519                 }
1520         }
1521         if (defined $o_git_dir) {
1522                 $git_dir = $o_git_dir;
1523         }
1524         return $retval;
1525 }
1526
1527 # get type of given object
1528 sub git_get_type {
1529         my $hash = shift;
1530
1531         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1532         my $type = <$fd>;
1533         close $fd or return;
1534         chomp $type;
1535         return $type;
1536 }
1537
1538 # repository configuration
1539 our $config_file = '';
1540 our %config;
1541
1542 # store multiple values for single key as anonymous array reference
1543 # single values stored directly in the hash, not as [ <value> ]
1544 sub hash_set_multi {
1545         my ($hash, $key, $value) = @_;
1546
1547         if (!exists $hash->{$key}) {
1548                 $hash->{$key} = $value;
1549         } elsif (!ref $hash->{$key}) {
1550                 $hash->{$key} = [ $hash->{$key}, $value ];
1551         } else {
1552                 push @{$hash->{$key}}, $value;
1553         }
1554 }
1555
1556 # return hash of git project configuration
1557 # optionally limited to some section, e.g. 'gitweb'
1558 sub git_parse_project_config {
1559         my $section_regexp = shift;
1560         my %config;
1561
1562         local $/ = "\0";
1563
1564         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1565                 or return;
1566
1567         while (my $keyval = <$fh>) {
1568                 chomp $keyval;
1569                 my ($key, $value) = split(/\n/, $keyval, 2);
1570
1571                 hash_set_multi(\%config, $key, $value)
1572                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1573         }
1574         close $fh;
1575
1576         return %config;
1577 }
1578
1579 # convert config value to boolean, 'true' or 'false'
1580 # no value, number > 0, 'true' and 'yes' values are true
1581 # rest of values are treated as false (never as error)
1582 sub config_to_bool {
1583         my $val = shift;
1584
1585         # strip leading and trailing whitespace
1586         $val =~ s/^\s+//;
1587         $val =~ s/\s+$//;
1588
1589         return (!defined $val ||               # section.key
1590                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1591                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1592 }
1593
1594 # convert config value to simple decimal number
1595 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1596 # to be multiplied by 1024, 1048576, or 1073741824
1597 sub config_to_int {
1598         my $val = shift;
1599
1600         # strip leading and trailing whitespace
1601         $val =~ s/^\s+//;
1602         $val =~ s/\s+$//;
1603
1604         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1605                 $unit = lc($unit);
1606                 # unknown unit is treated as 1
1607                 return $num * ($unit eq 'g' ? 1073741824 :
1608                                $unit eq 'm' ?    1048576 :
1609                                $unit eq 'k' ?       1024 : 1);
1610         }
1611         return $val;
1612 }
1613
1614 # convert config value to array reference, if needed
1615 sub config_to_multi {
1616         my $val = shift;
1617
1618         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1619 }
1620
1621 sub git_get_project_config {
1622         my ($key, $type) = @_;
1623
1624         # key sanity check
1625         return unless ($key);
1626         $key =~ s/^gitweb\.//;
1627         return if ($key =~ m/\W/);
1628
1629         # type sanity check
1630         if (defined $type) {
1631                 $type =~ s/^--//;
1632                 $type = undef
1633                         unless ($type eq 'bool' || $type eq 'int');
1634         }
1635
1636         # get config
1637         if (!defined $config_file ||
1638             $config_file ne "$git_dir/config") {
1639                 %config = git_parse_project_config('gitweb');
1640                 $config_file = "$git_dir/config";
1641         }
1642
1643         # ensure given type
1644         if (!defined $type) {
1645                 return $config{"gitweb.$key"};
1646         } elsif ($type eq 'bool') {
1647                 # backward compatibility: 'git config --bool' returns true/false
1648                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1649         } elsif ($type eq 'int') {
1650                 return config_to_int($config{"gitweb.$key"});
1651         }
1652         return $config{"gitweb.$key"};
1653 }
1654
1655 # get hash of given path at given ref
1656 sub git_get_hash_by_path {
1657         my $base = shift;
1658         my $path = shift || return undef;
1659         my $type = shift;
1660
1661         $path =~ s,/+$,,;
1662
1663         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1664                 or die_error(undef, "Open git-ls-tree failed");
1665         my $line = <$fd>;
1666         close $fd or return undef;
1667
1668         if (!defined $line) {
1669                 # there is no tree or hash given by $path at $base
1670                 return undef;
1671         }
1672
1673         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1674         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1675         if (defined $type && $type ne $2) {
1676                 # type doesn't match
1677                 return undef;
1678         }
1679         return $3;
1680 }
1681
1682 # get path of entry with given hash at given tree-ish (ref)
1683 # used to get 'from' filename for combined diff (merge commit) for renames
1684 sub git_get_path_by_hash {
1685         my $base = shift || return;
1686         my $hash = shift || return;
1687
1688         local $/ = "\0";
1689
1690         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1691                 or return undef;
1692         while (my $line = <$fd>) {
1693                 chomp $line;
1694
1695                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1696                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1697                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1698                         close $fd;
1699                         return $1;
1700                 }
1701         }
1702         close $fd;
1703         return undef;
1704 }
1705
1706 ## ......................................................................
1707 ## git utility functions, directly accessing git repository
1708
1709 sub git_get_project_description {
1710         my $path = shift;
1711
1712         $git_dir = "$projectroot/$path";
1713         open my $fd, "$git_dir/description"
1714                 or return git_get_project_config('description');
1715         my $descr = <$fd>;
1716         close $fd;
1717         if (defined $descr) {
1718                 chomp $descr;
1719         }
1720         return $descr;
1721 }
1722
1723 sub git_get_project_url_list {
1724         my $path = shift;
1725
1726         $git_dir = "$projectroot/$path";
1727         open my $fd, "$git_dir/cloneurl"
1728                 or return wantarray ?
1729                 @{ config_to_multi(git_get_project_config('url')) } :
1730                    config_to_multi(git_get_project_config('url'));
1731         my @git_project_url_list = map { chomp; $_ } <$fd>;
1732         close $fd;
1733
1734         return wantarray ? @git_project_url_list : \@git_project_url_list;
1735 }
1736
1737 sub git_get_projects_list {
1738         my ($filter) = @_;
1739         my @list;
1740
1741         $filter ||= '';
1742         $filter =~ s/\.git$//;
1743
1744         my ($check_forks) = gitweb_check_feature('forks');
1745
1746         if (-d $projects_list) {
1747                 # search in directory
1748                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1749                 # remove the trailing "/"
1750                 $dir =~ s!/+$!!;
1751                 my $pfxlen = length("$dir");
1752                 my $pfxdepth = ($dir =~ tr!/!!);
1753
1754                 File::Find::find({
1755                         follow_fast => 1, # follow symbolic links
1756                         follow_skip => 2, # ignore duplicates
1757                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1758                         wanted => sub {
1759                                 # skip project-list toplevel, if we get it.
1760                                 return if (m!^[/.]$!);
1761                                 # only directories can be git repositories
1762                                 return unless (-d $_);
1763                                 # don't traverse too deep (Find is super slow on os x)
1764                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1765                                         $File::Find::prune = 1;
1766                                         return;
1767                                 }
1768
1769                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1770                                 # we check related file in $projectroot
1771                                 if ($check_forks and $subdir =~ m#/.#) {
1772                                         $File::Find::prune = 1;
1773                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1774                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1775                                         $File::Find::prune = 1;
1776                                 }
1777                         },
1778                 }, "$dir");
1779
1780         } elsif (-f $projects_list) {
1781                 # read from file(url-encoded):
1782                 # 'git%2Fgit.git Linus+Torvalds'
1783                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1784                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1785                 my %paths;
1786                 open my ($fd), $projects_list or return;
1787         PROJECT:
1788                 while (my $line = <$fd>) {
1789                         chomp $line;
1790                         my ($path, $owner) = split ' ', $line;
1791                         $path = unescape($path);
1792                         $owner = unescape($owner);
1793                         if (!defined $path) {
1794                                 next;
1795                         }
1796                         if ($filter ne '') {
1797                                 # looking for forks;
1798                                 my $pfx = substr($path, 0, length($filter));
1799                                 if ($pfx ne $filter) {
1800                                         next PROJECT;
1801                                 }
1802                                 my $sfx = substr($path, length($filter));
1803                                 if ($sfx !~ /^\/.*\.git$/) {
1804                                         next PROJECT;
1805                                 }
1806                         } elsif ($check_forks) {
1807                         PATH:
1808                                 foreach my $filter (keys %paths) {
1809                                         # looking for forks;
1810                                         my $pfx = substr($path, 0, length($filter));
1811                                         if ($pfx ne $filter) {
1812                                                 next PATH;
1813                                         }
1814                                         my $sfx = substr($path, length($filter));
1815                                         if ($sfx !~ /^\/.*\.git$/) {
1816                                                 next PATH;
1817                                         }
1818                                         # is a fork, don't include it in
1819                                         # the list
1820                                         next PROJECT;
1821                                 }
1822                         }
1823                         if (check_export_ok("$projectroot/$path")) {
1824                                 my $pr = {
1825                                         path => $path,
1826                                         owner => to_utf8($owner),
1827                                 };
1828                                 push @list, $pr;
1829                                 (my $forks_path = $path) =~ s/\.git$//;
1830                                 $paths{$forks_path}++;
1831                         }
1832                 }
1833                 close $fd;
1834         }
1835         return @list;
1836 }
1837
1838 our $gitweb_project_owner = undef;
1839 sub git_get_project_list_from_file {
1840
1841         return if (defined $gitweb_project_owner);
1842
1843         $gitweb_project_owner = {};
1844         # read from file (url-encoded):
1845         # 'git%2Fgit.git Linus+Torvalds'
1846         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1847         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1848         if (-f $projects_list) {
1849                 open (my $fd , $projects_list);
1850                 while (my $line = <$fd>) {
1851                         chomp $line;
1852                         my ($pr, $ow) = split ' ', $line;
1853                         $pr = unescape($pr);
1854                         $ow = unescape($ow);
1855                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1856                 }
1857                 close $fd;
1858         }
1859 }
1860
1861 sub git_get_project_owner {
1862         my $project = shift;
1863         my $owner;
1864
1865         return undef unless $project;
1866         $git_dir = "$projectroot/$project";
1867
1868         if (!defined $gitweb_project_owner) {
1869                 git_get_project_list_from_file();
1870         }
1871
1872         if (exists $gitweb_project_owner->{$project}) {
1873                 $owner = $gitweb_project_owner->{$project};
1874         }
1875         if (!defined $owner){
1876                 $owner = git_get_project_config('owner');
1877         }
1878         if (!defined $owner) {
1879                 $owner = get_file_owner("$git_dir");
1880         }
1881
1882         return $owner;
1883 }
1884
1885 sub git_get_last_activity {
1886         my ($path) = @_;
1887         my $fd;
1888
1889         $git_dir = "$projectroot/$path";
1890         open($fd, "-|", git_cmd(), 'for-each-ref',
1891              '--format=%(committer)',
1892              '--sort=-committerdate',
1893              '--count=1',
1894              'refs/heads') or return;
1895         my $most_recent = <$fd>;
1896         close $fd or return;
1897         if (defined $most_recent &&
1898             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
1899                 my $timestamp = $1;
1900                 my $age = time - $timestamp;
1901                 return ($age, age_string($age));
1902         }
1903         return (undef, undef);
1904 }
1905
1906 sub git_get_references {
1907         my $type = shift || "";
1908         my %refs;
1909         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
1910         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
1911         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
1912                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
1913                 or return;
1914
1915         while (my $line = <$fd>) {
1916                 chomp $line;
1917                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type/?[^^]+)!) {
1918                         if (defined $refs{$1}) {
1919                                 push @{$refs{$1}}, $2;
1920                         } else {
1921                                 $refs{$1} = [ $2 ];
1922                         }
1923                 }
1924         }
1925         close $fd or return;
1926         return \%refs;
1927 }
1928
1929 sub git_get_rev_name_tags {
1930         my $hash = shift || return undef;
1931
1932         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
1933                 or return;
1934         my $name_rev = <$fd>;
1935         close $fd;
1936
1937         if ($name_rev =~ m|^$hash tags/(.*)$|) {
1938                 return $1;
1939         } else {
1940                 # catches also '$hash undefined' output
1941                 return undef;
1942         }
1943 }
1944
1945 ## ----------------------------------------------------------------------
1946 ## parse to hash functions
1947
1948 sub parse_date {
1949         my $epoch = shift;
1950         my $tz = shift || "-0000";
1951
1952         my %date;
1953         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
1954         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
1955         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
1956         $date{'hour'} = $hour;
1957         $date{'minute'} = $min;
1958         $date{'mday'} = $mday;
1959         $date{'day'} = $days[$wday];
1960         $date{'month'} = $months[$mon];
1961         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
1962                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
1963         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
1964                              $mday, $months[$mon], $hour ,$min;
1965         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1966                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
1967
1968         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
1969         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
1970         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
1971         $date{'hour_local'} = $hour;
1972         $date{'minute_local'} = $min;
1973         $date{'tz_local'} = $tz;
1974         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
1975                                   1900+$year, $mon+1, $mday,
1976                                   $hour, $min, $sec, $tz);
1977         return %date;
1978 }
1979
1980 sub parse_tag {
1981         my $tag_id = shift;
1982         my %tag;
1983         my @comment;
1984
1985         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
1986         $tag{'id'} = $tag_id;
1987         while (my $line = <$fd>) {
1988                 chomp $line;
1989                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
1990                         $tag{'object'} = $1;
1991                 } elsif ($line =~ m/^type (.+)$/) {
1992                         $tag{'type'} = $1;
1993                 } elsif ($line =~ m/^tag (.+)$/) {
1994                         $tag{'name'} = $1;
1995                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
1996                         $tag{'author'} = $1;
1997                         $tag{'epoch'} = $2;
1998                         $tag{'tz'} = $3;
1999                 } elsif ($line =~ m/--BEGIN/) {
2000                         push @comment, $line;
2001                         last;
2002                 } elsif ($line eq "") {
2003                         last;
2004                 }
2005         }
2006         push @comment, <$fd>;
2007         $tag{'comment'} = \@comment;
2008         close $fd or return;
2009         if (!defined $tag{'name'}) {
2010                 return
2011         };
2012         return %tag
2013 }
2014
2015 sub parse_commit_text {
2016         my ($commit_text, $withparents) = @_;
2017         my @commit_lines = split '\n', $commit_text;
2018         my %co;
2019
2020         pop @commit_lines; # Remove '\0'
2021
2022         if (! @commit_lines) {
2023                 return;
2024         }
2025
2026         my $header = shift @commit_lines;
2027         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2028                 return;
2029         }
2030         ($co{'id'}, my @parents) = split ' ', $header;
2031         while (my $line = shift @commit_lines) {
2032                 last if $line eq "\n";
2033                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2034                         $co{'tree'} = $1;
2035                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2036                         push @parents, $1;
2037                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2038                         $co{'author'} = $1;
2039                         $co{'author_epoch'} = $2;
2040                         $co{'author_tz'} = $3;
2041                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2042                                 $co{'author_name'}  = $1;
2043                                 $co{'author_email'} = $2;
2044                         } else {
2045                                 $co{'author_name'} = $co{'author'};
2046                         }
2047                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2048                         $co{'committer'} = $1;
2049                         $co{'committer_epoch'} = $2;
2050                         $co{'committer_tz'} = $3;
2051                         $co{'committer_name'} = $co{'committer'};
2052                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2053                                 $co{'committer_name'}  = $1;
2054                                 $co{'committer_email'} = $2;
2055                         } else {
2056                                 $co{'committer_name'} = $co{'committer'};
2057                         }
2058                 }
2059         }
2060         if (!defined $co{'tree'}) {
2061                 return;
2062         };
2063         $co{'parents'} = \@parents;
2064         $co{'parent'} = $parents[0];
2065
2066         foreach my $title (@commit_lines) {
2067                 $title =~ s/^    //;
2068                 if ($title ne "") {
2069                         $co{'title'} = chop_str($title, 80, 5);
2070                         # remove leading stuff of merges to make the interesting part visible
2071                         if (length($title) > 50) {
2072                                 $title =~ s/^Automatic //;
2073                                 $title =~ s/^merge (of|with) /Merge ... /i;
2074                                 if (length($title) > 50) {
2075                                         $title =~ s/(http|rsync):\/\///;
2076                                 }
2077                                 if (length($title) > 50) {
2078                                         $title =~ s/(master|www|rsync)\.//;
2079                                 }
2080                                 if (length($title) > 50) {
2081                                         $title =~ s/kernel.org:?//;
2082                                 }
2083                                 if (length($title) > 50) {
2084                                         $title =~ s/\/pub\/scm//;
2085                                 }
2086                         }
2087                         $co{'title_short'} = chop_str($title, 50, 5);
2088                         last;
2089                 }
2090         }
2091         if ($co{'title'} eq "") {
2092                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2093         }
2094         # remove added spaces
2095         foreach my $line (@commit_lines) {
2096                 $line =~ s/^    //;
2097         }
2098         $co{'comment'} = \@commit_lines;
2099
2100         my $age = time - $co{'committer_epoch'};
2101         $co{'age'} = $age;
2102         $co{'age_string'} = age_string($age);
2103         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2104         if ($age > 60*60*24*7*2) {
2105                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2106                 $co{'age_string_age'} = $co{'age_string'};
2107         } else {
2108                 $co{'age_string_date'} = $co{'age_string'};
2109                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2110         }
2111         return %co;
2112 }
2113
2114 sub parse_commit {
2115         my ($commit_id) = @_;
2116         my %co;
2117
2118         local $/ = "\0";
2119
2120         open my $fd, "-|", git_cmd(), "rev-list",
2121                 "--parents",
2122                 "--header",
2123                 "--max-count=1",
2124                 $commit_id,
2125                 "--",
2126                 or die_error(undef, "Open git-rev-list failed");
2127         %co = parse_commit_text(<$fd>, 1);
2128         close $fd;
2129
2130         return %co;
2131 }
2132
2133 sub parse_commits {
2134         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2135         my @cos;
2136
2137         $maxcount ||= 1;
2138         $skip ||= 0;
2139
2140         local $/ = "\0";
2141
2142         open my $fd, "-|", git_cmd(), "rev-list",
2143                 "--header",
2144                 @args,
2145                 ("--max-count=" . $maxcount),
2146                 ("--skip=" . $skip),
2147                 @extra_options,
2148                 $commit_id,
2149                 "--",
2150                 ($filename ? ($filename) : ())
2151                 or die_error(undef, "Open git-rev-list failed");
2152         while (my $line = <$fd>) {
2153                 my %co = parse_commit_text($line);
2154                 push @cos, \%co;
2155         }
2156         close $fd;
2157
2158         return wantarray ? @cos : \@cos;
2159 }
2160
2161 # parse ref from ref_file, given by ref_id, with given type
2162 sub parse_ref {
2163         my $ref_file = shift;
2164         my $ref_id = shift;
2165         my $type = shift || git_get_type($ref_id);
2166         my %ref_item;
2167
2168         $ref_item{'type'} = $type;
2169         $ref_item{'id'} = $ref_id;
2170         $ref_item{'epoch'} = 0;
2171         $ref_item{'age'} = "unknown";
2172         if ($type eq "tag") {
2173                 my %tag = parse_tag($ref_id);
2174                 $ref_item{'comment'} = $tag{'comment'};
2175                 if ($tag{'type'} eq "commit") {
2176                         my %co = parse_commit($tag{'object'});
2177                         $ref_item{'epoch'} = $co{'committer_epoch'};
2178                         $ref_item{'age'} = $co{'age_string'};
2179                 } elsif (defined($tag{'epoch'})) {
2180                         my $age = time - $tag{'epoch'};
2181                         $ref_item{'epoch'} = $tag{'epoch'};
2182                         $ref_item{'age'} = age_string($age);
2183                 }
2184                 $ref_item{'reftype'} = $tag{'type'};
2185                 $ref_item{'name'} = $tag{'name'};
2186                 $ref_item{'refid'} = $tag{'object'};
2187         } elsif ($type eq "commit"){
2188                 my %co = parse_commit($ref_id);
2189                 $ref_item{'reftype'} = "commit";
2190                 $ref_item{'name'} = $ref_file;
2191                 $ref_item{'title'} = $co{'title'};
2192                 $ref_item{'refid'} = $ref_id;
2193                 $ref_item{'epoch'} = $co{'committer_epoch'};
2194                 $ref_item{'age'} = $co{'age_string'};
2195         } else {
2196                 $ref_item{'reftype'} = $type;
2197                 $ref_item{'name'} = $ref_file;
2198                 $ref_item{'refid'} = $ref_id;
2199         }
2200
2201         return %ref_item;
2202 }
2203
2204 # parse line of git-diff-tree "raw" output
2205 sub parse_difftree_raw_line {
2206         my $line = shift;
2207         my %res;
2208
2209         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2210         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2211         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2212                 $res{'from_mode'} = $1;
2213                 $res{'to_mode'} = $2;
2214                 $res{'from_id'} = $3;
2215                 $res{'to_id'} = $4;
2216                 $res{'status'} = $5;
2217                 $res{'similarity'} = $6;
2218                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2219                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2220                 } else {
2221                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2222                 }
2223         }
2224         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2225         # combined diff (for merge commit)
2226         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2227                 $res{'nparents'}  = length($1);
2228                 $res{'from_mode'} = [ split(' ', $2) ];
2229                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2230                 $res{'from_id'} = [ split(' ', $3) ];
2231                 $res{'to_id'} = pop @{$res{'from_id'}};
2232                 $res{'status'} = [ split('', $4) ];
2233                 $res{'to_file'} = unquote($5);
2234         }
2235         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2236         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2237                 $res{'commit'} = $1;
2238         }
2239
2240         return wantarray ? %res : \%res;
2241 }
2242
2243 # wrapper: return parsed line of git-diff-tree "raw" output
2244 # (the argument might be raw line, or parsed info)
2245 sub parsed_difftree_line {
2246         my $line_or_ref = shift;
2247
2248         if (ref($line_or_ref) eq "HASH") {
2249                 # pre-parsed (or generated by hand)
2250                 return $line_or_ref;
2251         } else {
2252                 return parse_difftree_raw_line($line_or_ref);
2253         }
2254 }
2255
2256 # parse line of git-ls-tree output
2257 sub parse_ls_tree_line ($;%) {
2258         my $line = shift;
2259         my %opts = @_;
2260         my %res;
2261
2262         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2263         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2264
2265         $res{'mode'} = $1;
2266         $res{'type'} = $2;
2267         $res{'hash'} = $3;
2268         if ($opts{'-z'}) {
2269                 $res{'name'} = $4;
2270         } else {
2271                 $res{'name'} = unquote($4);
2272         }
2273
2274         return wantarray ? %res : \%res;
2275 }
2276
2277 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2278 sub parse_from_to_diffinfo {
2279         my ($diffinfo, $from, $to, @parents) = @_;
2280
2281         if ($diffinfo->{'nparents'}) {
2282                 # combined diff
2283                 $from->{'file'} = [];
2284                 $from->{'href'} = [];
2285                 fill_from_file_info($diffinfo, @parents)
2286                         unless exists $diffinfo->{'from_file'};
2287                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2288                         $from->{'file'}[$i] =
2289                                 defined $diffinfo->{'from_file'}[$i] ?
2290                                         $diffinfo->{'from_file'}[$i] :
2291                                         $diffinfo->{'to_file'};
2292                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2293                                 $from->{'href'}[$i] = href(action=>"blob",
2294                                                            hash_base=>$parents[$i],
2295                                                            hash=>$diffinfo->{'from_id'}[$i],
2296                                                            file_name=>$from->{'file'}[$i]);
2297                         } else {
2298                                 $from->{'href'}[$i] = undef;
2299                         }
2300                 }
2301         } else {
2302                 # ordinary (not combined) diff
2303                 $from->{'file'} = $diffinfo->{'from_file'};
2304                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2305                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2306                                                hash=>$diffinfo->{'from_id'},
2307                                                file_name=>$from->{'file'});
2308                 } else {
2309                         delete $from->{'href'};
2310                 }
2311         }
2312
2313         $to->{'file'} = $diffinfo->{'to_file'};
2314         if (!is_deleted($diffinfo)) { # file exists in result
2315                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2316                                      hash=>$diffinfo->{'to_id'},
2317                                      file_name=>$to->{'file'});
2318         } else {
2319                 delete $to->{'href'};
2320         }
2321 }
2322
2323 ## ......................................................................
2324 ## parse to array of hashes functions
2325
2326 sub git_get_heads_list {
2327         my $limit = shift;
2328         my @headslist;
2329
2330         open my $fd, '-|', git_cmd(), 'for-each-ref',
2331                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2332                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2333                 'refs/heads'
2334                 or return;
2335         while (my $line = <$fd>) {
2336                 my %ref_item;
2337
2338                 chomp $line;
2339                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2340                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2341                 my ($committer, $epoch, $tz) =
2342                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2343                 $ref_item{'fullname'}  = $name;
2344                 $name =~ s!^refs/heads/!!;
2345
2346                 $ref_item{'name'}  = $name;
2347                 $ref_item{'id'}    = $hash;
2348                 $ref_item{'title'} = $title || '(no commit message)';
2349                 $ref_item{'epoch'} = $epoch;
2350                 if ($epoch) {
2351                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2352                 } else {
2353                         $ref_item{'age'} = "unknown";
2354                 }
2355
2356                 push @headslist, \%ref_item;
2357         }
2358         close $fd;
2359
2360         return wantarray ? @headslist : \@headslist;
2361 }
2362
2363 sub git_get_tags_list {
2364         my $limit = shift;
2365         my @tagslist;
2366
2367         open my $fd, '-|', git_cmd(), 'for-each-ref',
2368                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2369                 '--format=%(objectname) %(objecttype) %(refname) '.
2370                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2371                 'refs/tags'
2372                 or return;
2373         while (my $line = <$fd>) {
2374                 my %ref_item;
2375
2376                 chomp $line;
2377                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2378                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2379                 my ($creator, $epoch, $tz) =
2380                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2381                 $ref_item{'fullname'} = $name;
2382                 $name =~ s!^refs/tags/!!;
2383
2384                 $ref_item{'type'} = $type;
2385                 $ref_item{'id'} = $id;
2386                 $ref_item{'name'} = $name;
2387                 if ($type eq "tag") {
2388                         $ref_item{'subject'} = $title;
2389                         $ref_item{'reftype'} = $reftype;
2390                         $ref_item{'refid'}   = $refid;
2391                 } else {
2392                         $ref_item{'reftype'} = $type;
2393                         $ref_item{'refid'}   = $id;
2394                 }
2395
2396                 if ($type eq "tag" || $type eq "commit") {
2397                         $ref_item{'epoch'} = $epoch;
2398                         if ($epoch) {
2399                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2400                         } else {
2401                                 $ref_item{'age'} = "unknown";
2402                         }
2403                 }
2404
2405                 push @tagslist, \%ref_item;
2406         }
2407         close $fd;
2408
2409         return wantarray ? @tagslist : \@tagslist;
2410 }
2411
2412 ## ----------------------------------------------------------------------
2413 ## filesystem-related functions
2414
2415 sub get_file_owner {
2416         my $path = shift;
2417
2418         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2419         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2420         if (!defined $gcos) {
2421                 return undef;
2422         }
2423         my $owner = $gcos;
2424         $owner =~ s/[,;].*$//;
2425         return to_utf8($owner);
2426 }
2427
2428 ## ......................................................................
2429 ## mimetype related functions
2430
2431 sub mimetype_guess_file {
2432         my $filename = shift;
2433         my $mimemap = shift;
2434         -r $mimemap or return undef;
2435
2436         my %mimemap;
2437         open(MIME, $mimemap) or return undef;
2438         while (<MIME>) {
2439                 next if m/^#/; # skip comments
2440                 my ($mime, $exts) = split(/\t+/);
2441                 if (defined $exts) {
2442                         my @exts = split(/\s+/, $exts);
2443                         foreach my $ext (@exts) {
2444                                 $mimemap{$ext} = $mime;
2445                         }
2446                 }
2447         }
2448         close(MIME);
2449
2450         $filename =~ /\.([^.]*)$/;
2451         return $mimemap{$1};
2452 }
2453
2454 sub mimetype_guess {
2455         my $filename = shift;
2456         my $mime;
2457         $filename =~ /\./ or return undef;
2458
2459         if ($mimetypes_file) {
2460                 my $file = $mimetypes_file;
2461                 if ($file !~ m!^/!) { # if it is relative path
2462                         # it is relative to project
2463                         $file = "$projectroot/$project/$file";
2464                 }
2465                 $mime = mimetype_guess_file($filename, $file);
2466         }
2467         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2468         return $mime;
2469 }
2470
2471 sub blob_mimetype {
2472         my $fd = shift;
2473         my $filename = shift;
2474
2475         if ($filename) {
2476                 my $mime = mimetype_guess($filename);
2477                 $mime and return $mime;
2478         }
2479
2480         # just in case
2481         return $default_blob_plain_mimetype unless $fd;
2482
2483         if (-T $fd) {
2484                 return 'text/plain' .
2485                        ($default_text_plain_charset ? '; charset='.$default_text_plain_charset : '');
2486         } elsif (! $filename) {
2487                 return 'application/octet-stream';
2488         } elsif ($filename =~ m/\.png$/i) {
2489                 return 'image/png';
2490         } elsif ($filename =~ m/\.gif$/i) {
2491                 return 'image/gif';
2492         } elsif ($filename =~ m/\.jpe?g$/i) {
2493                 return 'image/jpeg';
2494         } else {
2495                 return 'application/octet-stream';
2496         }
2497 }
2498
2499 ## ======================================================================
2500 ## functions printing HTML: header, footer, error page
2501
2502 sub git_header_html {
2503         my $status = shift || "200 OK";
2504         my $expires = shift;
2505
2506         my $title = "$site_name";
2507         if (defined $project) {
2508                 $title .= " - " . to_utf8($project);
2509                 if (defined $action) {
2510                         $title .= "/$action";
2511                         if (defined $file_name) {
2512                                 $title .= " - " . esc_path($file_name);
2513                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2514                                         $title .= "/";
2515                                 }
2516                         }
2517                 }
2518         }
2519         my $content_type;
2520         # require explicit support from the UA if we are to send the page as
2521         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2522         # we have to do this because MSIE sometimes globs '*/*', pretending to
2523         # support xhtml+xml but choking when it gets what it asked for.
2524         if (defined $cgi->http('HTTP_ACCEPT') &&
2525             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2526             $cgi->Accept('application/xhtml+xml') != 0) {
2527                 $content_type = 'application/xhtml+xml';
2528         } else {
2529                 $content_type = 'text/html';
2530         }
2531         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2532                            -status=> $status, -expires => $expires);
2533         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2534         print <<EOF;
2535 <?xml version="1.0" encoding="utf-8"?>
2536 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2537 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2538 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2539 <!-- git core binaries version $git_version -->
2540 <head>
2541 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2542 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2543 <meta name="robots" content="index, nofollow"/>
2544 <title>$title</title>
2545 EOF
2546 # print out each stylesheet that exist
2547         if (defined $stylesheet) {
2548 #provides backwards capability for those people who define style sheet in a config file
2549                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2550         } else {
2551                 foreach my $stylesheet (@stylesheets) {
2552                         next unless $stylesheet;
2553                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2554                 }
2555         }
2556         if (defined $project) {
2557                 my %href_params = get_feed_info();
2558                 if (!exists $href_params{'-title'}) {
2559                         $href_params{'-title'} = 'log';
2560                 }
2561
2562                 foreach my $format qw(RSS Atom) {
2563                         my $type = lc($format);
2564                         my %link_attr = (
2565                                 '-rel' => 'alternate',
2566                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2567                                 '-type' => "application/$type+xml"
2568                         );
2569
2570                         $href_params{'action'} = $type;
2571                         $link_attr{'-href'} = href(%href_params);
2572                         print "<link ".
2573                               "rel=\"$link_attr{'-rel'}\" ".
2574                               "title=\"$link_attr{'-title'}\" ".
2575                               "href=\"$link_attr{'-href'}\" ".
2576                               "type=\"$link_attr{'-type'}\" ".
2577                               "/>\n";
2578
2579                         $href_params{'extra_options'} = '--no-merges';
2580                         $link_attr{'-href'} = href(%href_params);
2581                         $link_attr{'-title'} .= ' (no merges)';
2582                         print "<link ".
2583                               "rel=\"$link_attr{'-rel'}\" ".
2584                               "title=\"$link_attr{'-title'}\" ".
2585                               "href=\"$link_attr{'-href'}\" ".
2586                               "type=\"$link_attr{'-type'}\" ".
2587                               "/>\n";
2588                 }
2589
2590         } else {
2591                 printf('<link rel="alternate" title="%s projects list" '.
2592                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2593                        $site_name, href(project=>undef, action=>"project_index"));
2594                 printf('<link rel="alternate" title="%s projects feeds" '.
2595                        'href="%s" type="text/x-opml" />'."\n",
2596                        $site_name, href(project=>undef, action=>"opml"));
2597         }
2598         if (defined $favicon) {
2599                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2600         }
2601
2602         print "</head>\n" .
2603               "<body>\n";
2604
2605         if (-f $site_header) {
2606                 open (my $fd, $site_header);
2607                 print <$fd>;
2608                 close $fd;
2609         }
2610
2611         print "<div class=\"page_header\">\n" .
2612               $cgi->a({-href => esc_url($logo_url),
2613                        -title => $logo_label},
2614                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2615         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2616         if (defined $project) {
2617                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2618                 if (defined $action) {
2619                         print " / $action";
2620                 }
2621                 print "\n";
2622         }
2623         print "</div>\n";
2624
2625         my ($have_search) = gitweb_check_feature('search');
2626         if ((defined $project) && ($have_search)) {
2627                 if (!defined $searchtext) {
2628                         $searchtext = "";
2629                 }
2630                 my $search_hash;
2631                 if (defined $hash_base) {
2632                         $search_hash = $hash_base;
2633                 } elsif (defined $hash) {
2634                         $search_hash = $hash;
2635                 } else {
2636                         $search_hash = "HEAD";
2637                 }
2638                 my $action = $my_uri;
2639                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2640                 if ($use_pathinfo) {
2641                         $action .= "/".esc_url($project);
2642                 } else {
2643                         $cgi->param("p", $project);
2644                 }
2645                 $cgi->param("a", "search");
2646                 $cgi->param("h", $search_hash);
2647                 print $cgi->startform(-method => "get", -action => $action) .
2648                       "<div class=\"search\">\n" .
2649                       (!$use_pathinfo && $cgi->hidden(-name => "p") . "\n") .
2650                       $cgi->hidden(-name => "a") . "\n" .
2651                       $cgi->hidden(-name => "h") . "\n" .
2652                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2653                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2654                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2655                       " search:\n",
2656                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2657                       "<span title=\"Extended regular expression\">" .
2658                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2659                                      -checked => $search_use_regexp) .
2660                       "</span>" .
2661                       "</div>" .
2662                       $cgi->end_form() . "\n";
2663         }
2664 }
2665
2666 sub git_footer_html {
2667         my $feed_class = 'rss_logo';
2668
2669         print "<div class=\"page_footer\">\n";
2670         if (defined $project) {
2671                 my $descr = git_get_project_description($project);
2672                 if (defined $descr) {
2673                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2674                 }
2675
2676                 my %href_params = get_feed_info();
2677                 if (!%href_params) {
2678                         $feed_class .= ' generic';
2679                 }
2680                 $href_params{'-title'} ||= 'log';
2681
2682                 foreach my $format qw(RSS Atom) {
2683                         $href_params{'action'} = lc($format);
2684                         print $cgi->a({-href => href(%href_params),
2685                                       -title => "$href_params{'-title'} $format feed",
2686                                       -class => $feed_class}, $format)."\n";
2687                 }
2688
2689         } else {
2690                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2691                               -class => $feed_class}, "OPML") . " ";
2692                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2693                               -class => $feed_class}, "TXT") . "\n";
2694         }
2695         print "</div>\n"; # class="page_footer"
2696
2697         if (-f $site_footer) {
2698                 open (my $fd, $site_footer);
2699                 print <$fd>;
2700                 close $fd;
2701         }
2702
2703         print "</body>\n" .
2704               "</html>";
2705 }
2706
2707 sub die_error {
2708         my $status = shift || "403 Forbidden";
2709         my $error = shift || "Malformed query, file missing or permission denied";
2710
2711         git_header_html($status);
2712         print <<EOF;
2713 <div class="page_body">
2714 <br /><br />
2715 $status - $error
2716 <br />
2717 </div>
2718 EOF
2719         git_footer_html();
2720         exit;
2721 }
2722
2723 ## ----------------------------------------------------------------------
2724 ## functions printing or outputting HTML: navigation
2725
2726 sub git_print_page_nav {
2727         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2728         $extra = '' if !defined $extra; # pager or formats
2729
2730         my @navs = qw(summary shortlog log commit commitdiff tree);
2731         if ($suppress) {
2732                 @navs = grep { $_ ne $suppress } @navs;
2733         }
2734
2735         my %arg = map { $_ => {action=>$_} } @navs;
2736         if (defined $head) {
2737                 for (qw(commit commitdiff)) {
2738                         $arg{$_}{'hash'} = $head;
2739                 }
2740                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2741                         for (qw(shortlog log)) {
2742                                 $arg{$_}{'hash'} = $head;
2743                         }
2744                 }
2745         }
2746         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2747         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2748
2749         print "<div class=\"page_nav\">\n" .
2750                 (join " | ",
2751                  map { $_ eq $current ?
2752                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2753                  } @navs);
2754         print "<br/>\n$extra<br/>\n" .
2755               "</div>\n";
2756 }
2757
2758 sub format_paging_nav {
2759         my ($action, $hash, $head, $page, $nrevs) = @_;
2760         my $paging_nav;
2761
2762
2763         if ($hash ne $head || $page) {
2764                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2765         } else {
2766                 $paging_nav .= "HEAD";
2767         }
2768
2769         if ($page > 0) {
2770                 $paging_nav .= " &sdot; " .
2771                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2772                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2773         } else {
2774                 $paging_nav .= " &sdot; prev";
2775         }
2776
2777         if ($nrevs >= (100 * ($page+1)-1)) {
2778                 $paging_nav .= " &sdot; " .
2779                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2780                                  -accesskey => "n", -title => "Alt-n"}, "next");
2781         } else {
2782                 $paging_nav .= " &sdot; next";
2783         }
2784
2785         return $paging_nav;
2786 }
2787
2788 ## ......................................................................
2789 ## functions printing or outputting HTML: div
2790
2791 sub git_print_header_div {
2792         my ($action, $title, $hash, $hash_base) = @_;
2793         my %args = ();
2794
2795         $args{'action'} = $action;
2796         $args{'hash'} = $hash if $hash;
2797         $args{'hash_base'} = $hash_base if $hash_base;
2798
2799         print "<div class=\"header\">\n" .
2800               $cgi->a({-href => href(%args), -class => "title"},
2801               $title ? $title : $action) .
2802               "\n</div>\n";
2803 }
2804
2805 #sub git_print_authorship (\%) {
2806 sub git_print_authorship {
2807         my $co = shift;
2808
2809         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2810         print "<div class=\"author_date\">" .
2811               esc_html($co->{'author_name'}) .
2812               " [$ad{'rfc2822'}";
2813         if ($ad{'hour_local'} < 6) {
2814                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2815                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2816         } else {
2817                 printf(" (%02d:%02d %s)",
2818                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2819         }
2820         print "]</div>\n";
2821 }
2822
2823 sub git_print_page_path {
2824         my $name = shift;
2825         my $type = shift;
2826         my $hb = shift;
2827
2828
2829         print "<div class=\"page_path\">";
2830         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2831                       -title => 'tree root'}, to_utf8("[$project]"));
2832         print " / ";
2833         if (defined $name) {
2834                 my @dirname = split '/', $name;
2835                 my $basename = pop @dirname;
2836                 my $fullname = '';
2837
2838                 foreach my $dir (@dirname) {
2839                         $fullname .= ($fullname ? '/' : '') . $dir;
2840                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2841                                                      hash_base=>$hb),
2842                                       -title => $fullname}, esc_path($dir));
2843                         print " / ";
2844                 }
2845                 if (defined $type && $type eq 'blob') {
2846                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2847                                                      hash_base=>$hb),
2848                                       -title => $name}, esc_path($basename));
2849                 } elsif (defined $type && $type eq 'tree') {
2850                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2851                                                      hash_base=>$hb),
2852                                       -title => $name}, esc_path($basename));
2853                         print " / ";
2854                 } else {
2855                         print esc_path($basename);
2856                 }
2857         }
2858         print "<br/></div>\n";
2859 }
2860
2861 # sub git_print_log (\@;%) {
2862 sub git_print_log ($;%) {
2863         my $log = shift;
2864         my %opts = @_;
2865
2866         if ($opts{'-remove_title'}) {
2867                 # remove title, i.e. first line of log
2868                 shift @$log;
2869         }
2870         # remove leading empty lines
2871         while (defined $log->[0] && $log->[0] eq "") {
2872                 shift @$log;
2873         }
2874
2875         # print log
2876         my $signoff = 0;
2877         my $empty = 0;
2878         foreach my $line (@$log) {
2879                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2880                         $signoff = 1;
2881                         $empty = 0;
2882                         if (! $opts{'-remove_signoff'}) {
2883                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2884                                 next;
2885                         } else {
2886                                 # remove signoff lines
2887                                 next;
2888                         }
2889                 } else {
2890                         $signoff = 0;
2891                 }
2892
2893                 # print only one empty line
2894                 # do not print empty line after signoff
2895                 if ($line eq "") {
2896                         next if ($empty || $signoff);
2897                         $empty = 1;
2898                 } else {
2899                         $empty = 0;
2900                 }
2901
2902                 print format_log_line_html($line) . "<br/>\n";
2903         }
2904
2905         if ($opts{'-final_empty_line'}) {
2906                 # end with single empty line
2907                 print "<br/>\n" unless $empty;
2908         }
2909 }
2910
2911 # return link target (what link points to)
2912 sub git_get_link_target {
2913         my $hash = shift;
2914         my $link_target;
2915
2916         # read link
2917         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
2918                 or return;
2919         {
2920                 local $/;
2921                 $link_target = <$fd>;
2922         }
2923         close $fd
2924                 or return;
2925
2926         return $link_target;
2927 }
2928
2929 # given link target, and the directory (basedir) the link is in,
2930 # return target of link relative to top directory (top tree);
2931 # return undef if it is not possible (including absolute links).
2932 sub normalize_link_target {
2933         my ($link_target, $basedir, $hash_base) = @_;
2934
2935         # we can normalize symlink target only if $hash_base is provided
2936         return unless $hash_base;
2937
2938         # absolute symlinks (beginning with '/') cannot be normalized
2939         return if (substr($link_target, 0, 1) eq '/');
2940
2941         # normalize link target to path from top (root) tree (dir)
2942         my $path;
2943         if ($basedir) {
2944                 $path = $basedir . '/' . $link_target;
2945         } else {
2946                 # we are in top (root) tree (dir)
2947                 $path = $link_target;
2948         }
2949
2950         # remove //, /./, and /../
2951         my @path_parts;
2952         foreach my $part (split('/', $path)) {
2953                 # discard '.' and ''
2954                 next if (!$part || $part eq '.');
2955                 # handle '..'
2956                 if ($part eq '..') {
2957                         if (@path_parts) {
2958                                 pop @path_parts;
2959                         } else {
2960                                 # link leads outside repository (outside top dir)
2961                                 return;
2962                         }
2963                 } else {
2964                         push @path_parts, $part;
2965                 }
2966         }
2967         $path = join('/', @path_parts);
2968
2969         return $path;
2970 }
2971
2972 # print tree entry (row of git_tree), but without encompassing <tr> element
2973 sub git_print_tree_entry {
2974         my ($t, $basedir, $hash_base, $have_blame) = @_;
2975
2976         my %base_key = ();
2977         $base_key{'hash_base'} = $hash_base if defined $hash_base;
2978
2979         # The format of a table row is: mode list link.  Where mode is
2980         # the mode of the entry, list is the name of the entry, an href,
2981         # and link is the action links of the entry.
2982
2983         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
2984         if ($t->{'type'} eq "blob") {
2985                 print "<td class=\"list\">" .
2986                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
2987                                                file_name=>"$basedir$t->{'name'}", %base_key),
2988                                 -class => "list"}, esc_path($t->{'name'}));
2989                 if (S_ISLNK(oct $t->{'mode'})) {
2990                         my $link_target = git_get_link_target($t->{'hash'});
2991                         if ($link_target) {
2992                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
2993                                 if (defined $norm_target) {
2994                                         print " -> " .
2995                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
2996                                                                      file_name=>$norm_target),
2997                                                        -title => $norm_target}, esc_path($link_target));
2998                                 } else {
2999                                         print " -> " . esc_path($link_target);
3000                                 }
3001                         }
3002                 }
3003                 print "</td>\n";
3004                 print "<td class=\"link\">";
3005                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3006                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3007                               "blob");
3008                 if ($have_blame) {
3009                         print " | " .
3010                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3011                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3012                                       "blame");
3013                 }
3014                 if (defined $hash_base) {
3015                         print " | " .
3016                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3017                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3018                                       "history");
3019                 }
3020                 print " | " .
3021                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3022                                                file_name=>"$basedir$t->{'name'}")},
3023                                 "raw");
3024                 print "</td>\n";
3025
3026         } elsif ($t->{'type'} eq "tree") {
3027                 print "<td class=\"list\">";
3028                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3029                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3030                               esc_path($t->{'name'}));
3031                 print "</td>\n";
3032                 print "<td class=\"link\">";
3033                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3034                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3035                               "tree");
3036                 if (defined $hash_base) {
3037                         print " | " .
3038                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3039                                                      file_name=>"$basedir$t->{'name'}")},
3040                                       "history");
3041                 }
3042                 print "</td>\n";
3043         } else {
3044                 # unknown object: we can only present history for it
3045                 # (this includes 'commit' object, i.e. submodule support)
3046                 print "<td class=\"list\">" .
3047                       esc_path($t->{'name'}) .
3048                       "</td>\n";
3049                 print "<td class=\"link\">";
3050                 if (defined $hash_base) {
3051                         print $cgi->a({-href => href(action=>"history",
3052                                                      hash_base=>$hash_base,
3053                                                      file_name=>"$basedir$t->{'name'}")},
3054                                       "history");
3055                 }
3056                 print "</td>\n";
3057         }
3058 }
3059
3060 ## ......................................................................
3061 ## functions printing large fragments of HTML
3062
3063 # get pre-image filenames for merge (combined) diff
3064 sub fill_from_file_info {
3065         my ($diff, @parents) = @_;
3066
3067         $diff->{'from_file'} = [ ];
3068         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3069         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3070                 if ($diff->{'status'}[$i] eq 'R' ||
3071                     $diff->{'status'}[$i] eq 'C') {
3072                         $diff->{'from_file'}[$i] =
3073                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3074                 }
3075         }
3076
3077         return $diff;
3078 }
3079
3080 # is current raw difftree line of file deletion
3081 sub is_deleted {
3082         my $diffinfo = shift;
3083
3084         return $diffinfo->{'to_id'} eq ('0' x 40);
3085 }
3086
3087 # does patch correspond to [previous] difftree raw line
3088 # $diffinfo  - hashref of parsed raw diff format
3089 # $patchinfo - hashref of parsed patch diff format
3090 #              (the same keys as in $diffinfo)
3091 sub is_patch_split {
3092         my ($diffinfo, $patchinfo) = @_;
3093
3094         return defined $diffinfo && defined $patchinfo
3095                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3096 }
3097
3098
3099 sub git_difftree_body {
3100         my ($difftree, $hash, @parents) = @_;
3101         my ($parent) = $parents[0];
3102         my ($have_blame) = gitweb_check_feature('blame');
3103         print "<div class=\"list_head\">\n";
3104         if ($#{$difftree} > 10) {
3105                 print(($#{$difftree} + 1) . " files changed:\n");
3106         }
3107         print "</div>\n";
3108
3109         print "<table class=\"" .
3110               (@parents > 1 ? "combined " : "") .
3111               "diff_tree\">\n";
3112
3113         # header only for combined diff in 'commitdiff' view
3114         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3115         if ($has_header) {
3116                 # table header
3117                 print "<thead><tr>\n" .
3118                        "<th></th><th></th>\n"; # filename, patchN link
3119                 for (my $i = 0; $i < @parents; $i++) {
3120                         my $par = $parents[$i];
3121                         print "<th>" .
3122                               $cgi->a({-href => href(action=>"commitdiff",
3123                                                      hash=>$hash, hash_parent=>$par),
3124                                        -title => 'commitdiff to parent number ' .
3125                                                   ($i+1) . ': ' . substr($par,0,7)},
3126                                       $i+1) .
3127                               "&nbsp;</th>\n";
3128                 }
3129                 print "</tr></thead>\n<tbody>\n";
3130         }
3131
3132         my $alternate = 1;
3133         my $patchno = 0;
3134         foreach my $line (@{$difftree}) {
3135                 my $diff = parsed_difftree_line($line);
3136
3137                 if ($alternate) {
3138                         print "<tr class=\"dark\">\n";
3139                 } else {
3140                         print "<tr class=\"light\">\n";
3141                 }
3142                 $alternate ^= 1;
3143
3144                 if (exists $diff->{'nparents'}) { # combined diff
3145
3146                         fill_from_file_info($diff, @parents)
3147                                 unless exists $diff->{'from_file'};
3148
3149                         if (!is_deleted($diff)) {
3150                                 # file exists in the result (child) commit
3151                                 print "<td>" .
3152                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3153                                                              file_name=>$diff->{'to_file'},
3154                                                              hash_base=>$hash),
3155                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3156                                       "</td>\n";
3157                         } else {
3158                                 print "<td>" .
3159                                       esc_path($diff->{'to_file'}) .
3160                                       "</td>\n";
3161                         }
3162
3163                         if ($action eq 'commitdiff') {
3164                                 # link to patch
3165                                 $patchno++;
3166                                 print "<td class=\"link\">" .
3167                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3168                                       " | " .
3169                                       "</td>\n";
3170                         }
3171
3172                         my $has_history = 0;
3173                         my $not_deleted = 0;
3174                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3175                                 my $hash_parent = $parents[$i];
3176                                 my $from_hash = $diff->{'from_id'}[$i];
3177                                 my $from_path = $diff->{'from_file'}[$i];
3178                                 my $status = $diff->{'status'}[$i];
3179
3180                                 $has_history ||= ($status ne 'A');
3181                                 $not_deleted ||= ($status ne 'D');
3182
3183                                 if ($status eq 'A') {
3184                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3185                                 } elsif ($status eq 'D') {
3186                                         print "<td class=\"link\">" .
3187                                               $cgi->a({-href => href(action=>"blob",
3188                                                                      hash_base=>$hash,
3189                                                                      hash=>$from_hash,
3190                                                                      file_name=>$from_path)},
3191                                                       "blob" . ($i+1)) .
3192                                               " | </td>\n";
3193                                 } else {
3194                                         if ($diff->{'to_id'} eq $from_hash) {
3195                                                 print "<td class=\"link nochange\">";
3196                                         } else {
3197                                                 print "<td class=\"link\">";
3198                                         }
3199                                         print $cgi->a({-href => href(action=>"blobdiff",
3200                                                                      hash=>$diff->{'to_id'},
3201                                                                      hash_parent=>$from_hash,
3202                                                                      hash_base=>$hash,
3203                                                                      hash_parent_base=>$hash_parent,
3204                                                                      file_name=>$diff->{'to_file'},
3205                                                                      file_parent=>$from_path)},
3206                                                       "diff" . ($i+1)) .
3207                                               " | </td>\n";
3208                                 }
3209                         }
3210
3211                         print "<td class=\"link\">";
3212                         if ($not_deleted) {
3213                                 print $cgi->a({-href => href(action=>"blob",
3214                                                              hash=>$diff->{'to_id'},
3215                                                              file_name=>$diff->{'to_file'},
3216                                                              hash_base=>$hash)},
3217                                               "blob");
3218                                 print " | " if ($has_history);
3219                         }
3220                         if ($has_history) {
3221                                 print $cgi->a({-href => href(action=>"history",
3222                                                              file_name=>$diff->{'to_file'},
3223                                                              hash_base=>$hash)},
3224                                               "history");
3225                         }
3226                         print "</td>\n";
3227
3228                         print "</tr>\n";
3229                         next; # instead of 'else' clause, to avoid extra indent
3230                 }
3231                 # else ordinary diff
3232
3233                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3234                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3235                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3236                         $to_mode_oct = oct $diff->{'to_mode'};
3237                         if (S_ISREG($to_mode_oct)) { # only for regular file
3238                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3239                         }
3240                         $to_file_type = file_type($diff->{'to_mode'});
3241                 }
3242                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3243                         $from_mode_oct = oct $diff->{'from_mode'};
3244                         if (S_ISREG($to_mode_oct)) { # only for regular file
3245                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3246                         }
3247                         $from_file_type = file_type($diff->{'from_mode'});
3248                 }
3249
3250                 if ($diff->{'status'} eq "A") { # created
3251                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3252                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3253                         $mode_chng   .= "]</span>";
3254                         print "<td>";
3255                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3256                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3257                                       -class => "list"}, esc_path($diff->{'file'}));
3258                         print "</td>\n";
3259                         print "<td>$mode_chng</td>\n";
3260                         print "<td class=\"link\">";
3261                         if ($action eq 'commitdiff') {
3262                                 # link to patch
3263                                 $patchno++;
3264                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3265                                 print " | ";
3266                         }
3267                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3268                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3269                                       "blob");
3270                         print "</td>\n";
3271
3272                 } elsif ($diff->{'status'} eq "D") { # deleted
3273                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3274                         print "<td>";
3275                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3276                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3277                                        -class => "list"}, esc_path($diff->{'file'}));
3278                         print "</td>\n";
3279                         print "<td>$mode_chng</td>\n";
3280                         print "<td class=\"link\">";
3281                         if ($action eq 'commitdiff') {
3282                                 # link to patch
3283                                 $patchno++;
3284                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3285                                 print " | ";
3286                         }
3287                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3288                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3289                                       "blob") . " | ";
3290                         if ($have_blame) {
3291                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3292                                                              file_name=>$diff->{'file'})},
3293                                               "blame") . " | ";
3294                         }
3295                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3296                                                      file_name=>$diff->{'file'})},
3297                                       "history");
3298                         print "</td>\n";
3299
3300                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3301                         my $mode_chnge = "";
3302                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3303                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3304                                 if ($from_file_type ne $to_file_type) {
3305                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3306                                 }
3307                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3308                                         if ($from_mode_str && $to_mode_str) {
3309                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3310                                         } elsif ($to_mode_str) {
3311                                                 $mode_chnge .= " mode: $to_mode_str";
3312                                         }
3313                                 }
3314                                 $mode_chnge .= "]</span>\n";
3315                         }
3316                         print "<td>";
3317                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3318                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3319                                       -class => "list"}, esc_path($diff->{'file'}));
3320                         print "</td>\n";
3321                         print "<td>$mode_chnge</td>\n";
3322                         print "<td class=\"link\">";
3323                         if ($action eq 'commitdiff') {
3324                                 # link to patch
3325                                 $patchno++;
3326                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3327                                       " | ";
3328                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3329                                 # "commit" view and modified file (not onlu mode changed)
3330                                 print $cgi->a({-href => href(action=>"blobdiff",
3331                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3332                                                              hash_base=>$hash, hash_parent_base=>$parent,
3333                                                              file_name=>$diff->{'file'})},
3334                                               "diff") .
3335                                       " | ";
3336                         }
3337                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3338                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3339                                        "blob") . " | ";
3340                         if ($have_blame) {
3341                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3342                                                              file_name=>$diff->{'file'})},
3343                                               "blame") . " | ";
3344                         }
3345                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3346                                                      file_name=>$diff->{'file'})},
3347                                       "history");
3348                         print "</td>\n";
3349
3350                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3351                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3352                         my $nstatus = $status_name{$diff->{'status'}};
3353                         my $mode_chng = "";
3354                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3355                                 # mode also for directories, so we cannot use $to_mode_str
3356                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3357                         }
3358                         print "<td>" .
3359                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3360                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3361                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3362                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3363                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3364                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3365                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3366                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3367                               "<td class=\"link\">";
3368                         if ($action eq 'commitdiff') {
3369                                 # link to patch
3370                                 $patchno++;
3371                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3372                                       " | ";
3373                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3374                                 # "commit" view and modified file (not only pure rename or copy)
3375                                 print $cgi->a({-href => href(action=>"blobdiff",
3376                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3377                                                              hash_base=>$hash, hash_parent_base=>$parent,
3378                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3379                                               "diff") .
3380                                       " | ";
3381                         }
3382                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3383                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3384                                       "blob") . " | ";
3385                         if ($have_blame) {
3386                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3387                                                              file_name=>$diff->{'to_file'})},
3388                                               "blame") . " | ";
3389                         }
3390                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3391                                                     file_name=>$diff->{'to_file'})},
3392                                       "history");
3393                         print "</td>\n";
3394
3395                 } # we should not encounter Unmerged (U) or Unknown (X) status
3396                 print "</tr>\n";
3397         }
3398         print "</tbody>" if $has_header;
3399         print "</table>\n";
3400 }
3401
3402 sub git_patchset_body {
3403         my ($fd, $difftree, $hash, @hash_parents) = @_;
3404         my ($hash_parent) = $hash_parents[0];
3405
3406         my $is_combined = (@hash_parents > 1);
3407         my $patch_idx = 0;
3408         my $patch_number = 0;
3409         my $patch_line;
3410         my $diffinfo;
3411         my $to_name;
3412         my (%from, %to);
3413
3414         print "<div class=\"patchset\">\n";
3415
3416         # skip to first patch
3417         while ($patch_line = <$fd>) {
3418                 chomp $patch_line;
3419
3420                 last if ($patch_line =~ m/^diff /);
3421         }
3422
3423  PATCH:
3424         while ($patch_line) {
3425
3426                 # parse "git diff" header line
3427                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3428                         # $1 is from_name, which we do not use
3429                         $to_name = unquote($2);
3430                         $to_name =~ s!^b/!!;
3431                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3432                         # $1 is 'cc' or 'combined', which we do not use
3433                         $to_name = unquote($2);
3434                 } else {
3435                         $to_name = undef;
3436                 }
3437
3438                 # check if current patch belong to current raw line
3439                 # and parse raw git-diff line if needed
3440                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3441                         # this is continuation of a split patch
3442                         print "<div class=\"patch cont\">\n";
3443                 } else {
3444                         # advance raw git-diff output if needed
3445                         $patch_idx++ if defined $diffinfo;
3446
3447                         # read and prepare patch information
3448                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3449
3450                         # compact combined diff output can have some patches skipped
3451                         # find which patch (using pathname of result) we are at now;
3452                         if ($is_combined) {
3453                                 while ($to_name ne $diffinfo->{'to_file'}) {
3454                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3455                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3456                                               "</div>\n";  # class="patch"
3457
3458                                         $patch_idx++;
3459                                         $patch_number++;
3460
3461                                         last if $patch_idx > $#$difftree;
3462                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3463                                 }
3464                         }
3465
3466                         # modifies %from, %to hashes
3467                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3468
3469                         # this is first patch for raw difftree line with $patch_idx index
3470                         # we index @$difftree array from 0, but number patches from 1
3471                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3472                 }
3473
3474                 # git diff header
3475                 #assert($patch_line =~ m/^diff /) if DEBUG;
3476                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3477                 $patch_number++;
3478                 # print "git diff" header
3479                 print format_git_diff_header_line($patch_line, $diffinfo,
3480                                                   \%from, \%to);
3481
3482                 # print extended diff header
3483                 print "<div class=\"diff extended_header\">\n";
3484         EXTENDED_HEADER:
3485                 while ($patch_line = <$fd>) {
3486                         chomp $patch_line;
3487
3488                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3489
3490                         print format_extended_diff_header_line($patch_line, $diffinfo,
3491                                                                \%from, \%to);
3492                 }
3493                 print "</div>\n"; # class="diff extended_header"
3494
3495                 # from-file/to-file diff header
3496                 if (! $patch_line) {
3497                         print "</div>\n"; # class="patch"
3498                         last PATCH;
3499                 }
3500                 next PATCH if ($patch_line =~ m/^diff /);
3501                 #assert($patch_line =~ m/^---/) if DEBUG;
3502
3503                 my $last_patch_line = $patch_line;
3504                 $patch_line = <$fd>;
3505                 chomp $patch_line;
3506                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3507
3508                 print format_diff_from_to_header($last_patch_line, $patch_line,
3509                                                  $diffinfo, \%from, \%to,
3510                                                  @hash_parents);
3511
3512                 # the patch itself
3513         LINE:
3514                 while ($patch_line = <$fd>) {
3515                         chomp $patch_line;
3516
3517                         next PATCH if ($patch_line =~ m/^diff /);
3518
3519                         print format_diff_line($patch_line, \%from, \%to);
3520                 }
3521
3522         } continue {
3523                 print "</div>\n"; # class="patch"
3524         }
3525
3526         # for compact combined (--cc) format, with chunk and patch simpliciaction
3527         # patchset might be empty, but there might be unprocessed raw lines
3528         for (++$patch_idx if $patch_number > 0;
3529              $patch_idx < @$difftree;
3530              ++$patch_idx) {
3531                 # read and prepare patch information
3532                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3533
3534                 # generate anchor for "patch" links in difftree / whatchanged part
3535                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3536                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3537                       "</div>\n";  # class="patch"
3538
3539                 $patch_number++;
3540         }
3541
3542         if ($patch_number == 0) {
3543                 if (@hash_parents > 1) {
3544                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3545                 } else {
3546                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3547                 }
3548         }
3549
3550         print "</div>\n"; # class="patchset"
3551 }
3552
3553 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3554
3555 sub git_project_list_body {
3556         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3557
3558         my ($check_forks) = gitweb_check_feature('forks');
3559
3560         my @projects;
3561         foreach my $pr (@$projlist) {
3562                 my (@aa) = git_get_last_activity($pr->{'path'});
3563                 unless (@aa) {
3564                         next;
3565                 }
3566                 ($pr->{'age'}, $pr->{'age_string'}) = @aa;
3567                 if (!defined $pr->{'descr'}) {
3568                         my $descr = git_get_project_description($pr->{'path'}) || "";
3569                         $pr->{'descr_long'} = to_utf8($descr);
3570                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3571                 }
3572                 if (!defined $pr->{'owner'}) {
3573                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3574                 }
3575                 if ($check_forks) {
3576                         my $pname = $pr->{'path'};
3577                         if (($pname =~ s/\.git$//) &&
3578                             ($pname !~ /\/$/) &&
3579                             (-d "$projectroot/$pname")) {
3580                                 $pr->{'forks'} = "-d $projectroot/$pname";
3581                         }
3582                         else {
3583                                 $pr->{'forks'} = 0;
3584                         }
3585                 }
3586                 push @projects, $pr;
3587         }
3588
3589         $order ||= $default_projects_order;
3590         $from = 0 unless defined $from;
3591         $to = $#projects if (!defined $to || $#projects < $to);
3592
3593         print "<table class=\"project_list\">\n";
3594         unless ($no_header) {
3595                 print "<tr>\n";
3596                 if ($check_forks) {
3597                         print "<th></th>\n";
3598                 }
3599                 if ($order eq "project") {
3600                         @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
3601                         print "<th>Project</th>\n";
3602                 } else {
3603                         print "<th>" .
3604                               $cgi->a({-href => href(project=>undef, order=>'project'),
3605                                        -class => "header"}, "Project") .
3606                               "</th>\n";
3607                 }
3608                 if ($order eq "descr") {
3609                         @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
3610                         print "<th>Description</th>\n";
3611                 } else {
3612                         print "<th>" .
3613                               $cgi->a({-href => href(project=>undef, order=>'descr'),
3614                                        -class => "header"}, "Description") .
3615                               "</th>\n";
3616                 }
3617                 if ($order eq "owner") {
3618                         @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
3619                         print "<th>Owner</th>\n";
3620                 } else {
3621                         print "<th>" .
3622                               $cgi->a({-href => href(project=>undef, order=>'owner'),
3623                                        -class => "header"}, "Owner") .
3624                               "</th>\n";
3625                 }
3626                 if ($order eq "age") {
3627                         @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
3628                         print "<th>Last Change</th>\n";
3629                 } else {
3630                         print "<th>" .
3631                               $cgi->a({-href => href(project=>undef, order=>'age'),
3632                                        -class => "header"}, "Last Change") .
3633                               "</th>\n";
3634                 }
3635                 print "<th></th>\n" .
3636                       "</tr>\n";
3637         }
3638         my $alternate = 1;
3639         for (my $i = $from; $i <= $to; $i++) {
3640                 my $pr = $projects[$i];
3641                 if ($alternate) {
3642                         print "<tr class=\"dark\">\n";
3643                 } else {
3644                         print "<tr class=\"light\">\n";
3645                 }
3646                 $alternate ^= 1;
3647                 if ($check_forks) {
3648                         print "<td>";
3649                         if ($pr->{'forks'}) {
3650                                 print "<!-- $pr->{'forks'} -->\n";
3651                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3652                         }
3653                         print "</td>\n";
3654                 }
3655                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3656                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3657                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3658                                         -class => "list", -title => $pr->{'descr_long'}},
3659                                         esc_html($pr->{'descr'})) . "</td>\n" .
3660                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3661                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3662                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3663                       "<td class=\"link\">" .
3664                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3665                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3666                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3667                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3668                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3669                       "</td>\n" .
3670                       "</tr>\n";
3671         }
3672         if (defined $extra) {
3673                 print "<tr>\n";
3674                 if ($check_forks) {
3675                         print "<td></td>\n";
3676                 }
3677                 print "<td colspan=\"5\">$extra</td>\n" .
3678                       "</tr>\n";
3679         }
3680         print "</table>\n";
3681 }
3682
3683 sub git_shortlog_body {
3684         # uses global variable $project
3685         my ($commitlist, $from, $to, $refs, $extra) = @_;
3686
3687         $from = 0 unless defined $from;
3688         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3689
3690         print "<table class=\"shortlog\">\n";
3691         my $alternate = 1;
3692         for (my $i = $from; $i <= $to; $i++) {
3693                 my %co = %{$commitlist->[$i]};
3694                 my $commit = $co{'id'};
3695                 my $ref = format_ref_marker($refs, $commit);
3696                 if ($alternate) {
3697                         print "<tr class=\"dark\">\n";
3698                 } else {
3699                         print "<tr class=\"light\">\n";
3700                 }
3701                 $alternate ^= 1;
3702                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3703                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3704                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3705                       "<td><i>" . $author . "</i></td>\n" .
3706                       "<td>";
3707                 print format_subject_html($co{'title'}, $co{'title_short'},
3708                                           href(action=>"commit", hash=>$commit), $ref);
3709                 print "</td>\n" .
3710                       "<td class=\"link\">" .
3711                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3712                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3713                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3714                 my $snapshot_links = format_snapshot_links($commit);
3715                 if (defined $snapshot_links) {
3716                         print " | " . $snapshot_links;
3717                 }
3718                 print "</td>\n" .
3719                       "</tr>\n";
3720         }
3721         if (defined $extra) {
3722                 print "<tr>\n" .
3723                       "<td colspan=\"4\">$extra</td>\n" .
3724                       "</tr>\n";
3725         }
3726         print "</table>\n";
3727 }
3728
3729 sub git_history_body {
3730         # Warning: assumes constant type (blob or tree) during history
3731         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3732
3733         $from = 0 unless defined $from;
3734         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3735
3736         print "<table class=\"history\">\n";
3737         my $alternate = 1;
3738         for (my $i = $from; $i <= $to; $i++) {
3739                 my %co = %{$commitlist->[$i]};
3740                 if (!%co) {
3741                         next;
3742                 }
3743                 my $commit = $co{'id'};
3744
3745                 my $ref = format_ref_marker($refs, $commit);
3746
3747                 if ($alternate) {
3748                         print "<tr class=\"dark\">\n";
3749                 } else {
3750                         print "<tr class=\"light\">\n";
3751                 }
3752                 $alternate ^= 1;
3753         # shortlog uses      chop_str($co{'author_name'}, 10)
3754                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3755                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3756                       "<td><i>" . $author . "</i></td>\n" .
3757                       "<td>";
3758                 # originally git_history used chop_str($co{'title'}, 50)
3759                 print format_subject_html($co{'title'}, $co{'title_short'},
3760                                           href(action=>"commit", hash=>$commit), $ref);
3761                 print "</td>\n" .
3762                       "<td class=\"link\">" .
3763                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3764                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3765
3766                 if ($ftype eq 'blob') {
3767                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3768                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3769                         if (defined $blob_current && defined $blob_parent &&
3770                                         $blob_current ne $blob_parent) {
3771                                 print " | " .
3772                                         $cgi->a({-href => href(action=>"blobdiff",
3773                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3774                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3775                                                                file_name=>$file_name)},
3776                                                 "diff to current");
3777                         }
3778                 }
3779                 print "</td>\n" .
3780                       "</tr>\n";
3781         }
3782         if (defined $extra) {
3783                 print "<tr>\n" .
3784                       "<td colspan=\"4\">$extra</td>\n" .
3785                       "</tr>\n";
3786         }
3787         print "</table>\n";
3788 }
3789
3790 sub git_tags_body {
3791         # uses global variable $project
3792         my ($taglist, $from, $to, $extra) = @_;
3793         $from = 0 unless defined $from;
3794         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3795
3796         print "<table class=\"tags\">\n";
3797         my $alternate = 1;
3798         for (my $i = $from; $i <= $to; $i++) {
3799                 my $entry = $taglist->[$i];
3800                 my %tag = %$entry;
3801                 my $comment = $tag{'subject'};
3802                 my $comment_short;
3803                 if (defined $comment) {
3804                         $comment_short = chop_str($comment, 30, 5);
3805                 }
3806                 if ($alternate) {
3807                         print "<tr class=\"dark\">\n";
3808                 } else {
3809                         print "<tr class=\"light\">\n";
3810                 }
3811                 $alternate ^= 1;
3812                 if (defined $tag{'age'}) {
3813                         print "<td><i>$tag{'age'}</i></td>\n";
3814                 } else {
3815                         print "<td></td>\n";
3816                 }
3817                 print "<td>" .
3818                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3819                                -class => "list name"}, esc_html($tag{'name'})) .
3820                       "</td>\n" .
3821                       "<td>";
3822                 if (defined $comment) {
3823                         print format_subject_html($comment, $comment_short,
3824                                                   href(action=>"tag", hash=>$tag{'id'}));
3825                 }
3826                 print "</td>\n" .
3827                       "<td class=\"selflink\">";
3828                 if ($tag{'type'} eq "tag") {
3829                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3830                 } else {
3831                         print "&nbsp;";
3832                 }
3833                 print "</td>\n" .
3834                       "<td class=\"link\">" . " | " .
3835                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3836                 if ($tag{'reftype'} eq "commit") {
3837                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3838                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3839                 } elsif ($tag{'reftype'} eq "blob") {
3840                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3841                 }
3842                 print "</td>\n" .
3843                       "</tr>";
3844         }
3845         if (defined $extra) {
3846                 print "<tr>\n" .
3847                       "<td colspan=\"5\">$extra</td>\n" .
3848                       "</tr>\n";
3849         }
3850         print "</table>\n";
3851 }
3852
3853 sub git_heads_body {
3854         # uses global variable $project
3855         my ($headlist, $head, $from, $to, $extra) = @_;
3856         $from = 0 unless defined $from;
3857         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3858
3859         print "<table class=\"heads\">\n";
3860         my $alternate = 1;
3861         for (my $i = $from; $i <= $to; $i++) {
3862                 my $entry = $headlist->[$i];
3863                 my %ref = %$entry;
3864                 my $curr = $ref{'id'} eq $head;
3865                 if ($alternate) {
3866                         print "<tr class=\"dark\">\n";
3867                 } else {
3868                         print "<tr class=\"light\">\n";
3869                 }
3870                 $alternate ^= 1;
3871                 print "<td><i>$ref{'age'}</i></td>\n" .
3872                       ($curr ? "<td class=\"current_head\">" : "<td>") .
3873                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
3874                                -class => "list name"},esc_html($ref{'name'})) .
3875                       "</td>\n" .
3876                       "<td class=\"link\">" .
3877                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
3878                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
3879                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
3880                       "</td>\n" .
3881                       "</tr>";
3882         }
3883         if (defined $extra) {
3884                 print "<tr>\n" .
3885                       "<td colspan=\"3\">$extra</td>\n" .
3886                       "</tr>\n";
3887         }
3888         print "</table>\n";
3889 }
3890
3891 sub git_search_grep_body {
3892         my ($commitlist, $from, $to, $extra) = @_;
3893         $from = 0 unless defined $from;
3894         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3895
3896         print "<table class=\"commit_search\">\n";
3897         my $alternate = 1;
3898         for (my $i = $from; $i <= $to; $i++) {
3899                 my %co = %{$commitlist->[$i]};
3900                 if (!%co) {
3901                         next;
3902                 }
3903                 my $commit = $co{'id'};
3904                 if ($alternate) {
3905                         print "<tr class=\"dark\">\n";
3906                 } else {
3907                         print "<tr class=\"light\">\n";
3908                 }
3909                 $alternate ^= 1;
3910                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
3911                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3912                       "<td><i>" . $author . "</i></td>\n" .
3913                       "<td>" .
3914                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
3915                                -class => "list subject"},
3916                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
3917                 my $comment = $co{'comment'};
3918                 foreach my $line (@$comment) {
3919                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
3920                                 my ($lead, $match, $trail) = ($1, $2, $3);
3921                                 $match = chop_str($match, 70, 5, 'center');
3922                                 my $contextlen = int((80 - length($match))/2);
3923                                 $contextlen = 30 if ($contextlen > 30);
3924                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
3925                                 $trail = chop_str($trail, $contextlen, 10, 'right');
3926
3927                                 $lead  = esc_html($lead);
3928                                 $match = esc_html($match);
3929                                 $trail = esc_html($trail);
3930
3931                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
3932                         }
3933                 }
3934                 print "</td>\n" .
3935                       "<td class=\"link\">" .
3936                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
3937                       " | " .
3938                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
3939                       " | " .
3940                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
3941                 print "</td>\n" .
3942                       "</tr>\n";
3943         }
3944         if (defined $extra) {
3945                 print "<tr>\n" .
3946                       "<td colspan=\"3\">$extra</td>\n" .
3947                       "</tr>\n";
3948         }
3949         print "</table>\n";
3950 }
3951
3952 ## ======================================================================
3953 ## ======================================================================
3954 ## actions
3955
3956 sub git_project_list {
3957         my $order = $cgi->param('o');
3958         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3959                 die_error(undef, "Unknown order parameter");
3960         }
3961
3962         my @list = git_get_projects_list();
3963         if (!@list) {
3964                 die_error(undef, "No projects found");
3965         }
3966
3967         git_header_html();
3968         if (-f $home_text) {
3969                 print "<div class=\"index_include\">\n";
3970                 open (my $fd, $home_text);
3971                 print <$fd>;
3972                 close $fd;
3973                 print "</div>\n";
3974         }
3975         git_project_list_body(\@list, $order);
3976         git_footer_html();
3977 }
3978
3979 sub git_forks {
3980         my $order = $cgi->param('o');
3981         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
3982                 die_error(undef, "Unknown order parameter");
3983         }
3984
3985         my @list = git_get_projects_list($project);
3986         if (!@list) {
3987                 die_error(undef, "No forks found");
3988         }
3989
3990         git_header_html();
3991         git_print_page_nav('','');
3992         git_print_header_div('summary', "$project forks");
3993         git_project_list_body(\@list, $order);
3994         git_footer_html();
3995 }
3996
3997 sub git_project_index {
3998         my @projects = git_get_projects_list($project);
3999
4000         print $cgi->header(
4001                 -type => 'text/plain',
4002                 -charset => 'utf-8',
4003                 -content_disposition => 'inline; filename="index.aux"');
4004
4005         foreach my $pr (@projects) {
4006                 if (!exists $pr->{'owner'}) {
4007                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4008                 }
4009
4010                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4011                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4012                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4013                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4014                 $path  =~ s/ /\+/g;
4015                 $owner =~ s/ /\+/g;
4016
4017                 print "$path $owner\n";
4018         }
4019 }
4020
4021 sub git_summary {
4022         my $descr = git_get_project_description($project) || "none";
4023         my %co = parse_commit("HEAD");
4024         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4025         my $head = $co{'id'};
4026
4027         my $owner = git_get_project_owner($project);
4028
4029         my $refs = git_get_references();
4030         # These get_*_list functions return one more to allow us to see if
4031         # there are more ...
4032         my @taglist  = git_get_tags_list(16);
4033         my @headlist = git_get_heads_list(16);
4034         my @forklist;
4035         my ($check_forks) = gitweb_check_feature('forks');
4036
4037         if ($check_forks) {
4038                 @forklist = git_get_projects_list($project);
4039         }
4040
4041         git_header_html();
4042         git_print_page_nav('summary','', $head);
4043
4044         print "<div class=\"title\">&nbsp;</div>\n";
4045         print "<table class=\"projects_list\">\n" .
4046               "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4047               "<tr><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4048         if (defined $cd{'rfc2822'}) {
4049                 print "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4050         }
4051
4052         # use per project git URL list in $projectroot/$project/cloneurl
4053         # or make project git URL from git base URL and project name
4054         my $url_tag = "URL";
4055         my @url_list = git_get_project_url_list($project);
4056         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4057         foreach my $git_url (@url_list) {
4058                 next unless $git_url;
4059                 print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
4060                 $url_tag = "";
4061         }
4062         print "</table>\n";
4063
4064         if (-s "$projectroot/$project/README.html") {
4065                 if (open my $fd, "$projectroot/$project/README.html") {
4066                         print "<div class=\"title\">readme</div>\n" .
4067                               "<div class=\"readme\">\n";
4068                         print $_ while (<$fd>);
4069                         print "\n</div>\n"; # class="readme"
4070                         close $fd;
4071                 }
4072         }
4073
4074         # we need to request one more than 16 (0..15) to check if
4075         # those 16 are all
4076         my @commitlist = $head ? parse_commits($head, 17) : ();
4077         if (@commitlist) {
4078                 git_print_header_div('shortlog');
4079                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4080                                   $#commitlist <=  15 ? undef :
4081                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4082         }
4083
4084         if (@taglist) {
4085                 git_print_header_div('tags');
4086                 git_tags_body(\@taglist, 0, 15,
4087                               $#taglist <=  15 ? undef :
4088                               $cgi->a({-href => href(action=>"tags")}, "..."));
4089         }
4090
4091         if (@headlist) {
4092                 git_print_header_div('heads');
4093                 git_heads_body(\@headlist, $head, 0, 15,
4094                                $#headlist <= 15 ? undef :
4095                                $cgi->a({-href => href(action=>"heads")}, "..."));
4096         }
4097
4098         if (@forklist) {
4099                 git_print_header_div('forks');
4100                 git_project_list_body(\@forklist, undef, 0, 15,
4101                                       $#forklist <= 15 ? undef :
4102                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4103                                       'noheader');
4104         }
4105
4106         git_footer_html();
4107 }
4108
4109 sub git_tag {
4110         my $head = git_get_head_hash($project);
4111         git_header_html();
4112         git_print_page_nav('','', $head,undef,$head);
4113         my %tag = parse_tag($hash);
4114
4115         if (! %tag) {
4116                 die_error(undef, "Unknown tag object");
4117         }
4118
4119         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4120         print "<div class=\"title_text\">\n" .
4121               "<table class=\"object_header\">\n" .
4122               "<tr>\n" .
4123               "<td>object</td>\n" .
4124               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4125                                $tag{'object'}) . "</td>\n" .
4126               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4127                                               $tag{'type'}) . "</td>\n" .
4128               "</tr>\n";
4129         if (defined($tag{'author'})) {
4130                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4131                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4132                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4133                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4134                         "</td></tr>\n";
4135         }
4136         print "</table>\n\n" .
4137               "</div>\n";
4138         print "<div class=\"page_body\">";
4139         my $comment = $tag{'comment'};
4140         foreach my $line (@$comment) {
4141                 chomp $line;
4142                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4143         }
4144         print "</div>\n";
4145         git_footer_html();
4146 }
4147
4148 sub git_blame2 {
4149         my $fd;
4150         my $ftype;
4151
4152         my ($have_blame) = gitweb_check_feature('blame');
4153         if (!$have_blame) {
4154                 die_error('403 Permission denied', "Permission denied");
4155         }
4156         die_error('404 Not Found', "File name not defined") if (!$file_name);
4157         $hash_base ||= git_get_head_hash($project);
4158         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4159         my %co = parse_commit($hash_base)
4160                 or die_error(undef, "Reading commit failed");
4161         if (!defined $hash) {
4162                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4163                         or die_error(undef, "Error looking up file");
4164         }
4165         $ftype = git_get_type($hash);
4166         if ($ftype !~ "blob") {
4167                 die_error('400 Bad Request', "Object is not a blob");
4168         }
4169         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4170               $file_name, $hash_base)
4171                 or die_error(undef, "Open git-blame failed");
4172         git_header_html();
4173         my $formats_nav =
4174                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4175                         "blob") .
4176                 " | " .
4177                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4178                         "history") .
4179                 " | " .
4180                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4181                         "HEAD");
4182         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4183         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4184         git_print_page_path($file_name, $ftype, $hash_base);
4185         my @rev_color = (qw(light2 dark2));
4186         my $num_colors = scalar(@rev_color);
4187         my $current_color = 0;
4188         my $last_rev;
4189         print <<HTML;
4190 <div class="page_body">
4191 <table class="blame">
4192 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4193 HTML
4194         my %metainfo = ();
4195         while (1) {
4196                 $_ = <$fd>;
4197                 last unless defined $_;
4198                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4199                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4200                 if (!exists $metainfo{$full_rev}) {
4201                         $metainfo{$full_rev} = {};
4202                 }
4203                 my $meta = $metainfo{$full_rev};
4204                 while (<$fd>) {
4205                         last if (s/^\t//);
4206                         if (/^(\S+) (.*)$/) {
4207                                 $meta->{$1} = $2;
4208                         }
4209                 }
4210                 my $data = $_;
4211                 chomp $data;
4212                 my $rev = substr($full_rev, 0, 8);
4213                 my $author = $meta->{'author'};
4214                 my %date = parse_date($meta->{'author-time'},
4215                                       $meta->{'author-tz'});
4216                 my $date = $date{'iso-tz'};
4217                 if ($group_size) {
4218                         $current_color = ++$current_color % $num_colors;
4219                 }
4220                 print "<tr class=\"$rev_color[$current_color]\">\n";
4221                 if ($group_size) {
4222                         print "<td class=\"sha1\"";
4223                         print " title=\"". esc_html($author) . ", $date\"";
4224                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4225                         print ">";
4226                         print $cgi->a({-href => href(action=>"commit",
4227                                                      hash=>$full_rev,
4228                                                      file_name=>$file_name)},
4229                                       esc_html($rev));
4230                         print "</td>\n";
4231                 }
4232                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4233                         or die_error(undef, "Open git-rev-parse failed");
4234                 my $parent_commit = <$dd>;
4235                 close $dd;
4236                 chomp($parent_commit);
4237                 my $blamed = href(action => 'blame',
4238                                   file_name => $meta->{'filename'},
4239                                   hash_base => $parent_commit);
4240                 print "<td class=\"linenr\">";
4241                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4242                                 -id => "l$lineno",
4243                                 -class => "linenr" },
4244                               esc_html($lineno));
4245                 print "</td>";
4246                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4247                 print "</tr>\n";
4248         }
4249         print "</table>\n";
4250         print "</div>";
4251         close $fd
4252                 or print "Reading blob failed\n";
4253         git_footer_html();
4254 }
4255
4256 sub git_blame {
4257         my $fd;
4258
4259         my ($have_blame) = gitweb_check_feature('blame');
4260         if (!$have_blame) {
4261                 die_error('403 Permission denied', "Permission denied");
4262         }
4263         die_error('404 Not Found', "File name not defined") if (!$file_name);
4264         $hash_base ||= git_get_head_hash($project);
4265         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4266         my %co = parse_commit($hash_base)
4267                 or die_error(undef, "Reading commit failed");
4268         if (!defined $hash) {
4269                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4270                         or die_error(undef, "Error lookup file");
4271         }
4272         open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
4273                 or die_error(undef, "Open git-annotate failed");
4274         git_header_html();
4275         my $formats_nav =
4276                 $cgi->a({-href => href(action=>"blob", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4277                         "blob") .
4278                 " | " .
4279                 $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)},
4280                         "history") .
4281                 " | " .
4282                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4283                         "HEAD");
4284         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4285         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4286         git_print_page_path($file_name, 'blob', $hash_base);
4287         print "<div class=\"page_body\">\n";
4288         print <<HTML;
4289 <table class="blame">
4290   <tr>
4291     <th>Commit</th>
4292     <th>Age</th>
4293     <th>Author</th>
4294     <th>Line</th>
4295     <th>Data</th>
4296   </tr>
4297 HTML
4298         my @line_class = (qw(light dark));
4299         my $line_class_len = scalar (@line_class);
4300         my $line_class_num = $#line_class;
4301         while (my $line = <$fd>) {
4302                 my $long_rev;
4303                 my $short_rev;
4304                 my $author;
4305                 my $time;
4306                 my $lineno;
4307                 my $data;
4308                 my $age;
4309                 my $age_str;
4310                 my $age_class;
4311
4312                 chomp $line;
4313                 $line_class_num = ($line_class_num + 1) % $line_class_len;
4314
4315                 if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
4316                         $long_rev = $1;
4317                         $author   = $2;
4318                         $time     = $3;
4319                         $lineno   = $4;
4320                         $data     = $5;
4321                 } else {
4322                         print qq(  <tr><td colspan="5" class="error">Unable to parse: $line</td></tr>\n);
4323                         next;
4324                 }
4325                 $short_rev  = substr ($long_rev, 0, 8);
4326                 $age        = time () - $time;
4327                 $age_str    = age_string ($age);
4328                 $age_str    =~ s/ /&nbsp;/g;
4329                 $age_class  = age_class($age);
4330                 $author     = esc_html ($author);
4331                 $author     =~ s/ /&nbsp;/g;
4332
4333                 $data = untabify($data);
4334                 $data = esc_html ($data);
4335
4336                 print <<HTML;
4337   <tr class="$line_class[$line_class_num]">
4338     <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
4339     <td class="$age_class">$age_str</td>
4340     <td>$author</td>
4341     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
4342     <td class="pre">$data</td>
4343   </tr>
4344 HTML
4345         } # while (my $line = <$fd>)
4346         print "</table>\n\n";
4347         close $fd
4348                 or print "Reading blob failed.\n";
4349         print "</div>";
4350         git_footer_html();
4351 }
4352
4353 sub git_tags {
4354         my $head = git_get_head_hash($project);
4355         git_header_html();
4356         git_print_page_nav('','', $head,undef,$head);
4357         git_print_header_div('summary', $project);
4358
4359         my @tagslist = git_get_tags_list();
4360         if (@tagslist) {
4361                 git_tags_body(\@tagslist);
4362         }
4363         git_footer_html();
4364 }
4365
4366 sub git_heads {
4367         my $head = git_get_head_hash($project);
4368         git_header_html();
4369         git_print_page_nav('','', $head,undef,$head);
4370         git_print_header_div('summary', $project);
4371
4372         my @headslist = git_get_heads_list();
4373         if (@headslist) {
4374                 git_heads_body(\@headslist, $head);
4375         }
4376         git_footer_html();
4377 }
4378
4379 sub git_blob_plain {
4380         my $expires;
4381
4382         if (!defined $hash) {
4383                 if (defined $file_name) {
4384                         my $base = $hash_base || git_get_head_hash($project);
4385                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4386                                 or die_error(undef, "Error lookup file");
4387                 } else {
4388                         die_error(undef, "No file name defined");
4389                 }
4390         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4391                 # blobs defined by non-textual hash id's can be cached
4392                 $expires = "+1d";
4393         }
4394
4395         my $type = shift;
4396         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4397                 or die_error(undef, "Couldn't cat $file_name, $hash");
4398
4399         $type ||= blob_mimetype($fd, $file_name);
4400
4401         # save as filename, even when no $file_name is given
4402         my $save_as = "$hash";
4403         if (defined $file_name) {
4404                 $save_as = $file_name;
4405         } elsif ($type =~ m/^text\//) {
4406                 $save_as .= '.txt';
4407         }
4408
4409         print $cgi->header(
4410                 -type => "$type",
4411                 -expires=>$expires,
4412                 -content_disposition => 'inline; filename="' . "$save_as" . '"');
4413         undef $/;
4414         binmode STDOUT, ':raw';
4415         print <$fd>;
4416         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4417         $/ = "\n";
4418         close $fd;
4419 }
4420
4421 sub git_blob {
4422         my $expires;
4423
4424         if (!defined $hash) {
4425                 if (defined $file_name) {
4426                         my $base = $hash_base || git_get_head_hash($project);
4427                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4428                                 or die_error(undef, "Error lookup file");
4429                 } else {
4430                         die_error(undef, "No file name defined");
4431                 }
4432         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4433                 # blobs defined by non-textual hash id's can be cached
4434                 $expires = "+1d";
4435         }
4436
4437         my ($have_blame) = gitweb_check_feature('blame');
4438         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4439                 or die_error(undef, "Couldn't cat $file_name, $hash");
4440         my $mimetype = blob_mimetype($fd, $file_name);
4441         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4442                 close $fd;
4443                 return git_blob_plain($mimetype);
4444         }
4445         # we can have blame only for text/* mimetype
4446         $have_blame &&= ($mimetype =~ m!^text/!);
4447
4448         git_header_html(undef, $expires);
4449         my $formats_nav = '';
4450         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4451                 if (defined $file_name) {
4452                         if ($have_blame) {
4453                                 $formats_nav .=
4454                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4455                                                 "blame") .
4456                                         " | ";
4457                         }
4458                         $formats_nav .=
4459                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4460                                         "history") .
4461                                 " | " .
4462                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4463                                         "raw") .
4464                                 " | " .
4465                                 $cgi->a({-href => href(action=>"blob",
4466                                                        hash_base=>"HEAD", file_name=>$file_name)},
4467                                         "HEAD");
4468                 } else {
4469                         $formats_nav .=
4470                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4471                                         "raw");
4472                 }
4473                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4474                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4475         } else {
4476                 print "<div class=\"page_nav\">\n" .
4477                       "<br/><br/></div>\n" .
4478                       "<div class=\"title\">$hash</div>\n";
4479         }
4480         git_print_page_path($file_name, "blob", $hash_base);
4481         print "<div class=\"page_body\">\n";
4482         if ($mimetype =~ m!^image/!) {
4483                 print qq!<img type="$mimetype"!;
4484                 if ($file_name) {
4485                         print qq! alt="$file_name" title="$file_name"!;
4486                 }
4487                 print qq! src="! .
4488                       href(action=>"blob_plain", hash=>$hash,
4489                            hash_base=>$hash_base, file_name=>$file_name) .
4490                       qq!" />\n!;
4491         } else {
4492                 my $nr;
4493                 while (my $line = <$fd>) {
4494                         chomp $line;
4495                         $nr++;
4496                         $line = untabify($line);
4497                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4498                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4499                 }
4500         }
4501         close $fd
4502                 or print "Reading blob failed.\n";
4503         print "</div>";
4504         git_footer_html();
4505 }
4506
4507 sub git_tree {
4508         if (!defined $hash_base) {
4509                 $hash_base = "HEAD";
4510         }
4511         if (!defined $hash) {
4512                 if (defined $file_name) {
4513                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4514                 } else {
4515                         $hash = $hash_base;
4516                 }
4517         }
4518         $/ = "\0";
4519         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4520                 or die_error(undef, "Open git-ls-tree failed");
4521         my @entries = map { chomp; $_ } <$fd>;
4522         close $fd or die_error(undef, "Reading tree failed");
4523         $/ = "\n";
4524
4525         my $refs = git_get_references();
4526         my $ref = format_ref_marker($refs, $hash_base);
4527         git_header_html();
4528         my $basedir = '';
4529         my ($have_blame) = gitweb_check_feature('blame');
4530         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4531                 my @views_nav = ();
4532                 if (defined $file_name) {
4533                         push @views_nav,
4534                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4535                                         "history"),
4536                                 $cgi->a({-href => href(action=>"tree",
4537                                                        hash_base=>"HEAD", file_name=>$file_name)},
4538                                         "HEAD"),
4539                 }
4540                 my $snapshot_links = format_snapshot_links($hash);
4541                 if (defined $snapshot_links) {
4542                         # FIXME: Should be available when we have no hash base as well.
4543                         push @views_nav, $snapshot_links;
4544                 }
4545                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4546                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4547         } else {
4548                 undef $hash_base;
4549                 print "<div class=\"page_nav\">\n";
4550                 print "<br/><br/></div>\n";
4551                 print "<div class=\"title\">$hash</div>\n";
4552         }
4553         if (defined $file_name) {
4554                 $basedir = $file_name;
4555                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4556                         $basedir .= '/';
4557                 }
4558         }
4559         git_print_page_path($file_name, 'tree', $hash_base);
4560         print "<div class=\"page_body\">\n";
4561         print "<table class=\"tree\">\n";
4562         my $alternate = 1;
4563         # '..' (top directory) link if possible
4564         if (defined $hash_base &&
4565             defined $file_name && $file_name =~ m![^/]+$!) {
4566                 if ($alternate) {
4567                         print "<tr class=\"dark\">\n";
4568                 } else {
4569                         print "<tr class=\"light\">\n";
4570                 }
4571                 $alternate ^= 1;
4572
4573                 my $up = $file_name;
4574                 $up =~ s!/?[^/]+$!!;
4575                 undef $up unless $up;
4576                 # based on git_print_tree_entry
4577                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4578                 print '<td class="list">';
4579                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4580                                              file_name=>$up)},
4581                               "..");
4582                 print "</td>\n";
4583                 print "<td class=\"link\"></td>\n";
4584
4585                 print "</tr>\n";
4586         }
4587         foreach my $line (@entries) {
4588                 my %t = parse_ls_tree_line($line, -z => 1);
4589
4590                 if ($alternate) {
4591                         print "<tr class=\"dark\">\n";
4592                 } else {
4593                         print "<tr class=\"light\">\n";
4594                 }
4595                 $alternate ^= 1;
4596
4597                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4598
4599                 print "</tr>\n";
4600         }
4601         print "</table>\n" .
4602               "</div>";
4603         git_footer_html();
4604 }
4605
4606 sub git_snapshot {
4607         my @supported_fmts = gitweb_check_feature('snapshot');
4608         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4609
4610         my $format = $cgi->param('sf');
4611         if (!@supported_fmts) {
4612                 die_error('403 Permission denied', "Permission denied");
4613         }
4614         # default to first supported snapshot format
4615         $format ||= $supported_fmts[0];
4616         if ($format !~ m/^[a-z0-9]+$/) {
4617                 die_error(undef, "Invalid snapshot format parameter");
4618         } elsif (!exists($known_snapshot_formats{$format})) {
4619                 die_error(undef, "Unknown snapshot format");
4620         } elsif (!grep($_ eq $format, @supported_fmts)) {
4621                 die_error(undef, "Unsupported snapshot format");
4622         }
4623
4624         if (!defined $hash) {
4625                 $hash = git_get_head_hash($project);
4626         }
4627
4628         my $git_command = git_cmd_str();
4629         my $name = $project;
4630         $name =~ s,([^/])/*\.git$,$1,;
4631         $name = basename($name);
4632         my $filename = to_utf8($name);
4633         $name =~ s/\047/\047\\\047\047/g;
4634         my $cmd;
4635         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4636         $cmd = "$git_command archive " .
4637                 "--format=$known_snapshot_formats{$format}{'format'} " .
4638                 "--prefix=\'$name\'/ $hash";
4639         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4640                 $cmd .= ' | ' . join ' ', @{$known_snapshot_formats{$format}{'compressor'}};
4641         }
4642
4643         print $cgi->header(
4644                 -type => $known_snapshot_formats{$format}{'type'},
4645                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4646                 -status => '200 OK');
4647
4648         open my $fd, "-|", $cmd
4649                 or die_error(undef, "Execute git-archive failed");
4650         binmode STDOUT, ':raw';
4651         print <$fd>;
4652         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4653         close $fd;
4654 }
4655
4656 sub git_log {
4657         my $head = git_get_head_hash($project);
4658         if (!defined $hash) {
4659                 $hash = $head;
4660         }
4661         if (!defined $page) {
4662                 $page = 0;
4663         }
4664         my $refs = git_get_references();
4665
4666         my @commitlist = parse_commits($hash, 101, (100 * $page));
4667
4668         my $paging_nav = format_paging_nav('log', $hash, $head, $page, (100 * ($page+1)));
4669
4670         git_header_html();
4671         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4672
4673         if (!@commitlist) {
4674                 my %co = parse_commit($hash);
4675
4676                 git_print_header_div('summary', $project);
4677                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4678         }
4679         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4680         for (my $i = 0; $i <= $to; $i++) {
4681                 my %co = %{$commitlist[$i]};
4682                 next if !%co;
4683                 my $commit = $co{'id'};
4684                 my $ref = format_ref_marker($refs, $commit);
4685                 my %ad = parse_date($co{'author_epoch'});
4686                 git_print_header_div('commit',
4687                                "<span class=\"age\">$co{'age_string'}</span>" .
4688                                esc_html($co{'title'}) . $ref,
4689                                $commit);
4690                 print "<div class=\"title_text\">\n" .
4691                       "<div class=\"log_link\">\n" .
4692                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4693                       " | " .
4694                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4695                       " | " .
4696                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4697                       "<br/>\n" .
4698                       "</div>\n" .
4699                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4700                       "</div>\n";
4701
4702                 print "<div class=\"log_body\">\n";
4703                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4704                 print "</div>\n";
4705         }
4706         if ($#commitlist >= 100) {
4707                 print "<div class=\"page_nav\">\n";
4708                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4709                                -accesskey => "n", -title => "Alt-n"}, "next");
4710                 print "</div>\n";
4711         }
4712         git_footer_html();
4713 }
4714
4715 sub git_commit {
4716         $hash ||= $hash_base || "HEAD";
4717         my %co = parse_commit($hash);
4718         if (!%co) {
4719                 die_error(undef, "Unknown commit object");
4720         }
4721         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4722         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4723
4724         my $parent  = $co{'parent'};
4725         my $parents = $co{'parents'}; # listref
4726
4727         # we need to prepare $formats_nav before any parameter munging
4728         my $formats_nav;
4729         if (!defined $parent) {
4730                 # --root commitdiff
4731                 $formats_nav .= '(initial)';
4732         } elsif (@$parents == 1) {
4733                 # single parent commit
4734                 $formats_nav .=
4735                         '(parent: ' .
4736                         $cgi->a({-href => href(action=>"commit",
4737                                                hash=>$parent)},
4738                                 esc_html(substr($parent, 0, 7))) .
4739                         ')';
4740         } else {
4741                 # merge commit
4742                 $formats_nav .=
4743                         '(merge: ' .
4744                         join(' ', map {
4745                                 $cgi->a({-href => href(action=>"commit",
4746                                                        hash=>$_)},
4747                                         esc_html(substr($_, 0, 7)));
4748                         } @$parents ) .
4749                         ')';
4750         }
4751
4752         if (!defined $parent) {
4753                 $parent = "--root";
4754         }
4755         my @difftree;
4756         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4757                 @diff_opts,
4758                 (@$parents <= 1 ? $parent : '-c'),
4759                 $hash, "--"
4760                 or die_error(undef, "Open git-diff-tree failed");
4761         @difftree = map { chomp; $_ } <$fd>;
4762         close $fd or die_error(undef, "Reading git-diff-tree failed");
4763
4764         # non-textual hash id's can be cached
4765         my $expires;
4766         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4767                 $expires = "+1d";
4768         }
4769         my $refs = git_get_references();
4770         my $ref = format_ref_marker($refs, $co{'id'});
4771
4772         git_header_html(undef, $expires);
4773         git_print_page_nav('commit', '',
4774                            $hash, $co{'tree'}, $hash,
4775                            $formats_nav);
4776
4777         if (defined $co{'parent'}) {
4778                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4779         } else {
4780                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4781         }
4782         print "<div class=\"title_text\">\n" .
4783               "<table class=\"object_header\">\n";
4784         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4785               "<tr>" .
4786               "<td></td><td> $ad{'rfc2822'}";
4787         if ($ad{'hour_local'} < 6) {
4788                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4789                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4790         } else {
4791                 printf(" (%02d:%02d %s)",
4792                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4793         }
4794         print "</td>" .
4795               "</tr>\n";
4796         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4797         print "<tr><td></td><td> $cd{'rfc2822'}" .
4798               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4799               "</td></tr>\n";
4800         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4801         print "<tr>" .
4802               "<td>tree</td>" .
4803               "<td class=\"sha1\">" .
4804               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4805                        class => "list"}, $co{'tree'}) .
4806               "</td>" .
4807               "<td class=\"link\">" .
4808               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4809                       "tree");
4810         my $snapshot_links = format_snapshot_links($hash);
4811         if (defined $snapshot_links) {
4812                 print " | " . $snapshot_links;
4813         }
4814         print "</td>" .
4815               "</tr>\n";
4816
4817         foreach my $par (@$parents) {
4818                 print "<tr>" .
4819                       "<td>parent</td>" .
4820                       "<td class=\"sha1\">" .
4821                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4822                                class => "list"}, $par) .
4823                       "</td>" .
4824                       "<td class=\"link\">" .
4825                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4826                       " | " .
4827                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4828                       "</td>" .
4829                       "</tr>\n";
4830         }
4831         print "</table>".
4832               "</div>\n";
4833
4834         print "<div class=\"page_body\">\n";
4835         git_print_log($co{'comment'});
4836         print "</div>\n";
4837
4838         git_difftree_body(\@difftree, $hash, @$parents);
4839
4840         git_footer_html();
4841 }
4842
4843 sub git_object {
4844         # object is defined by:
4845         # - hash or hash_base alone
4846         # - hash_base and file_name
4847         my $type;
4848
4849         # - hash or hash_base alone
4850         if ($hash || ($hash_base && !defined $file_name)) {
4851                 my $object_id = $hash || $hash_base;
4852
4853                 my $git_command = git_cmd_str();
4854                 open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"
4855                         or die_error('404 Not Found', "Object does not exist");
4856                 $type = <$fd>;
4857                 chomp $type;
4858                 close $fd
4859                         or die_error('404 Not Found', "Object does not exist");
4860
4861         # - hash_base and file_name
4862         } elsif ($hash_base && defined $file_name) {
4863                 $file_name =~ s,/+$,,;
4864
4865                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4866                         or die_error('404 Not Found', "Base object does not exist");
4867
4868                 # here errors should not hapen
4869                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4870                         or die_error(undef, "Open git-ls-tree failed");
4871                 my $line = <$fd>;
4872                 close $fd;
4873
4874                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4875                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4876                         die_error('404 Not Found', "File or directory for given base does not exist");
4877                 }
4878                 $type = $2;
4879                 $hash = $3;
4880         } else {
4881                 die_error('404 Not Found', "Not enough information to find object");
4882         }
4883
4884         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4885                                           hash=>$hash, hash_base=>$hash_base,
4886                                           file_name=>$file_name),
4887                              -status => '302 Found');
4888 }
4889
4890 sub git_blobdiff {
4891         my $format = shift || 'html';
4892
4893         my $fd;
4894         my @difftree;
4895         my %diffinfo;
4896         my $expires;
4897
4898         # preparing $fd and %diffinfo for git_patchset_body
4899         # new style URI
4900         if (defined $hash_base && defined $hash_parent_base) {
4901                 if (defined $file_name) {
4902                         # read raw output
4903                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4904                                 $hash_parent_base, $hash_base,
4905                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4906                                 or die_error(undef, "Open git-diff-tree failed");
4907                         @difftree = map { chomp; $_ } <$fd>;
4908                         close $fd
4909                                 or die_error(undef, "Reading git-diff-tree failed");
4910                         @difftree
4911                                 or die_error('404 Not Found', "Blob diff not found");
4912
4913                 } elsif (defined $hash &&
4914                          $hash =~ /[0-9a-fA-F]{40}/) {
4915                         # try to find filename from $hash
4916
4917                         # read filtered raw output
4918                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4919                                 $hash_parent_base, $hash_base, "--"
4920                                 or die_error(undef, "Open git-diff-tree failed");
4921                         @difftree =
4922                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4923                                 # $hash == to_id
4924                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4925                                 map { chomp; $_ } <$fd>;
4926                         close $fd
4927                                 or die_error(undef, "Reading git-diff-tree failed");
4928                         @difftree
4929                                 or die_error('404 Not Found', "Blob diff not found");
4930
4931                 } else {
4932                         die_error('404 Not Found', "Missing one of the blob diff parameters");
4933                 }
4934
4935                 if (@difftree > 1) {
4936                         die_error('404 Not Found', "Ambiguous blob diff specification");
4937                 }
4938
4939                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4940                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4941                 $file_name   ||= $diffinfo{'to_file'};
4942
4943                 $hash_parent ||= $diffinfo{'from_id'};
4944                 $hash        ||= $diffinfo{'to_id'};
4945
4946                 # non-textual hash id's can be cached
4947                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4948                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4949                         $expires = '+1d';
4950                 }
4951
4952                 # open patch output
4953                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4954                         '-p', ($format eq 'html' ? "--full-index" : ()),
4955                         $hash_parent_base, $hash_base,
4956                         "--", (defined $file_parent ? $file_parent : ()), $file_name
4957                         or die_error(undef, "Open git-diff-tree failed");
4958         }
4959
4960         # old/legacy style URI
4961         if (!%diffinfo && # if new style URI failed
4962             defined $hash && defined $hash_parent) {
4963                 # fake git-diff-tree raw output
4964                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
4965                 $diffinfo{'from_id'} = $hash_parent;
4966                 $diffinfo{'to_id'}   = $hash;
4967                 if (defined $file_name) {
4968                         if (defined $file_parent) {
4969                                 $diffinfo{'status'} = '2';
4970                                 $diffinfo{'from_file'} = $file_parent;
4971                                 $diffinfo{'to_file'}   = $file_name;
4972                         } else { # assume not renamed
4973                                 $diffinfo{'status'} = '1';
4974                                 $diffinfo{'from_file'} = $file_name;
4975                                 $diffinfo{'to_file'}   = $file_name;
4976                         }
4977                 } else { # no filename given
4978                         $diffinfo{'status'} = '2';
4979                         $diffinfo{'from_file'} = $hash_parent;
4980                         $diffinfo{'to_file'}   = $hash;
4981                 }
4982
4983                 # non-textual hash id's can be cached
4984                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
4985                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
4986                         $expires = '+1d';
4987                 }
4988
4989                 # open patch output
4990                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
4991                         '-p', ($format eq 'html' ? "--full-index" : ()),
4992                         $hash_parent, $hash, "--"
4993                         or die_error(undef, "Open git-diff failed");
4994         } else  {
4995                 die_error('404 Not Found', "Missing one of the blob diff parameters")
4996                         unless %diffinfo;
4997         }
4998
4999         # header
5000         if ($format eq 'html') {
5001                 my $formats_nav =
5002                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5003                                 "raw");
5004                 git_header_html(undef, $expires);
5005                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5006                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5007                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5008                 } else {
5009                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5010                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5011                 }
5012                 if (defined $file_name) {
5013                         git_print_page_path($file_name, "blob", $hash_base);
5014                 } else {
5015                         print "<div class=\"page_path\"></div>\n";
5016                 }
5017
5018         } elsif ($format eq 'plain') {
5019                 print $cgi->header(
5020                         -type => 'text/plain',
5021                         -charset => 'utf-8',
5022                         -expires => $expires,
5023                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5024
5025                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5026
5027         } else {
5028                 die_error(undef, "Unknown blobdiff format");
5029         }
5030
5031         # patch
5032         if ($format eq 'html') {
5033                 print "<div class=\"page_body\">\n";
5034
5035                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5036                 close $fd;
5037
5038                 print "</div>\n"; # class="page_body"
5039                 git_footer_html();
5040
5041         } else {
5042                 while (my $line = <$fd>) {
5043                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5044                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5045
5046                         print $line;
5047
5048                         last if $line =~ m!^\+\+\+!;
5049                 }
5050                 local $/ = undef;
5051                 print <$fd>;
5052                 close $fd;
5053         }
5054 }
5055
5056 sub git_blobdiff_plain {
5057         git_blobdiff('plain');
5058 }
5059
5060 sub git_commitdiff {
5061         my $format = shift || 'html';
5062         $hash ||= $hash_base || "HEAD";
5063         my %co = parse_commit($hash);
5064         if (!%co) {
5065                 die_error(undef, "Unknown commit object");
5066         }
5067
5068         # choose format for commitdiff for merge
5069         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5070                 $hash_parent = '--cc';
5071         }
5072         # we need to prepare $formats_nav before almost any parameter munging
5073         my $formats_nav;
5074         if ($format eq 'html') {
5075                 $formats_nav =
5076                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5077                                 "raw");
5078
5079                 if (defined $hash_parent &&
5080                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5081                         # commitdiff with two commits given
5082                         my $hash_parent_short = $hash_parent;
5083                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5084                                 $hash_parent_short = substr($hash_parent, 0, 7);
5085                         }
5086                         $formats_nav .=
5087                                 ' (from';
5088                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5089                                 if ($co{'parents'}[$i] eq $hash_parent) {
5090                                         $formats_nav .= ' parent ' . ($i+1);
5091                                         last;
5092                                 }
5093                         }
5094                         $formats_nav .= ': ' .
5095                                 $cgi->a({-href => href(action=>"commitdiff",
5096                                                        hash=>$hash_parent)},
5097                                         esc_html($hash_parent_short)) .
5098                                 ')';
5099                 } elsif (!$co{'parent'}) {
5100                         # --root commitdiff
5101                         $formats_nav .= ' (initial)';
5102                 } elsif (scalar @{$co{'parents'}} == 1) {
5103                         # single parent commit
5104                         $formats_nav .=
5105                                 ' (parent: ' .
5106                                 $cgi->a({-href => href(action=>"commitdiff",
5107                                                        hash=>$co{'parent'})},
5108                                         esc_html(substr($co{'parent'}, 0, 7))) .
5109                                 ')';
5110                 } else {
5111                         # merge commit
5112                         if ($hash_parent eq '--cc') {
5113                                 $formats_nav .= ' | ' .
5114                                         $cgi->a({-href => href(action=>"commitdiff",
5115                                                                hash=>$hash, hash_parent=>'-c')},
5116                                                 'combined');
5117                         } else { # $hash_parent eq '-c'
5118                                 $formats_nav .= ' | ' .
5119                                         $cgi->a({-href => href(action=>"commitdiff",
5120                                                                hash=>$hash, hash_parent=>'--cc')},
5121                                                 'compact');
5122                         }
5123                         $formats_nav .=
5124                                 ' (merge: ' .
5125                                 join(' ', map {
5126                                         $cgi->a({-href => href(action=>"commitdiff",
5127                                                                hash=>$_)},
5128                                                 esc_html(substr($_, 0, 7)));
5129                                 } @{$co{'parents'}} ) .
5130                                 ')';
5131                 }
5132         }
5133
5134         my $hash_parent_param = $hash_parent;
5135         if (!defined $hash_parent_param) {
5136                 # --cc for multiple parents, --root for parentless
5137                 $hash_parent_param =
5138                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5139         }
5140
5141         # read commitdiff
5142         my $fd;
5143         my @difftree;
5144         if ($format eq 'html') {
5145                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5146                         "--no-commit-id", "--patch-with-raw", "--full-index",
5147                         $hash_parent_param, $hash, "--"
5148                         or die_error(undef, "Open git-diff-tree failed");
5149
5150                 while (my $line = <$fd>) {
5151                         chomp $line;
5152                         # empty line ends raw part of diff-tree output
5153                         last unless $line;
5154                         push @difftree, scalar parse_difftree_raw_line($line);
5155                 }
5156
5157         } elsif ($format eq 'plain') {
5158                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5159                         '-p', $hash_parent_param, $hash, "--"
5160                         or die_error(undef, "Open git-diff-tree failed");
5161
5162         } else {
5163                 die_error(undef, "Unknown commitdiff format");
5164         }
5165
5166         # non-textual hash id's can be cached
5167         my $expires;
5168         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5169                 $expires = "+1d";
5170         }
5171
5172         # write commit message
5173         if ($format eq 'html') {
5174                 my $refs = git_get_references();
5175                 my $ref = format_ref_marker($refs, $co{'id'});
5176
5177                 git_header_html(undef, $expires);
5178                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5179                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5180                 git_print_authorship(\%co);
5181                 print "<div class=\"page_body\">\n";
5182                 if (@{$co{'comment'}} > 1) {
5183                         print "<div class=\"log\">\n";
5184                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5185                         print "</div>\n"; # class="log"
5186                 }
5187
5188         } elsif ($format eq 'plain') {
5189                 my $refs = git_get_references("tags");
5190                 my $tagname = git_get_rev_name_tags($hash);
5191                 my $filename = basename($project) . "-$hash.patch";
5192
5193                 print $cgi->header(
5194                         -type => 'text/plain',
5195                         -charset => 'utf-8',
5196                         -expires => $expires,
5197                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5198                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5199                 print "From: " . to_utf8($co{'author'}) . "\n";
5200                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5201                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5202
5203                 print "X-Git-Tag: $tagname\n" if $tagname;
5204                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5205
5206                 foreach my $line (@{$co{'comment'}}) {
5207                         print to_utf8($line) . "\n";
5208                 }
5209                 print "---\n\n";
5210         }
5211
5212         # write patch
5213         if ($format eq 'html') {
5214                 my $use_parents = !defined $hash_parent ||
5215                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5216                 git_difftree_body(\@difftree, $hash,
5217                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5218                 print "<br/>\n";
5219
5220                 git_patchset_body($fd, \@difftree, $hash,
5221                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5222                 close $fd;
5223                 print "</div>\n"; # class="page_body"
5224                 git_footer_html();
5225
5226         } elsif ($format eq 'plain') {
5227                 local $/ = undef;
5228                 print <$fd>;
5229                 close $fd
5230                         or print "Reading git-diff-tree failed\n";
5231         }
5232 }
5233
5234 sub git_commitdiff_plain {
5235         git_commitdiff('plain');
5236 }
5237
5238 sub git_history {
5239         if (!defined $hash_base) {
5240                 $hash_base = git_get_head_hash($project);
5241         }
5242         if (!defined $page) {
5243                 $page = 0;
5244         }
5245         my $ftype;
5246         my %co = parse_commit($hash_base);
5247         if (!%co) {
5248                 die_error(undef, "Unknown commit object");
5249         }
5250
5251         my $refs = git_get_references();
5252         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5253
5254         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5255                                        $file_name, "--full-history");
5256         if (!@commitlist) {
5257                 die_error('404 Not Found', "No such file or directory on given branch");
5258         }
5259
5260         if (!defined $hash && defined $file_name) {
5261                 # some commits could have deleted file in question,
5262                 # and not have it in tree, but one of them has to have it
5263                 for (my $i = 0; $i <= @commitlist; $i++) {
5264                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5265                         last if defined $hash;
5266                 }
5267         }
5268         if (defined $hash) {
5269                 $ftype = git_get_type($hash);
5270         }
5271         if (!defined $ftype) {
5272                 die_error(undef, "Unknown type of object");
5273         }
5274
5275         my $paging_nav = '';
5276         if ($page > 0) {
5277                 $paging_nav .=
5278                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5279                                                file_name=>$file_name)},
5280                                 "first");
5281                 $paging_nav .= " &sdot; " .
5282                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5283                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5284         } else {
5285                 $paging_nav .= "first";
5286                 $paging_nav .= " &sdot; prev";
5287         }
5288         my $next_link = '';
5289         if ($#commitlist >= 100) {
5290                 $next_link =
5291                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5292                                  -accesskey => "n", -title => "Alt-n"}, "next");
5293                 $paging_nav .= " &sdot; $next_link";
5294         } else {
5295                 $paging_nav .= " &sdot; next";
5296         }
5297
5298         git_header_html();
5299         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5300         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5301         git_print_page_path($file_name, $ftype, $hash_base);
5302
5303         git_history_body(\@commitlist, 0, 99,
5304                          $refs, $hash_base, $ftype, $next_link);
5305
5306         git_footer_html();
5307 }
5308
5309 sub git_search {
5310         my ($have_search) = gitweb_check_feature('search');
5311         if (!$have_search) {
5312                 die_error('403 Permission denied', "Permission denied");
5313         }
5314         if (!defined $searchtext) {
5315                 die_error(undef, "Text field empty");
5316         }
5317         if (!defined $hash) {
5318                 $hash = git_get_head_hash($project);
5319         }
5320         my %co = parse_commit($hash);
5321         if (!%co) {
5322                 die_error(undef, "Unknown commit object");
5323         }
5324         if (!defined $page) {
5325                 $page = 0;
5326         }
5327
5328         $searchtype ||= 'commit';
5329         if ($searchtype eq 'pickaxe') {
5330                 # pickaxe may take all resources of your box and run for several minutes
5331                 # with every query - so decide by yourself how public you make this feature
5332                 my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5333                 if (!$have_pickaxe) {
5334                         die_error('403 Permission denied', "Permission denied");
5335                 }
5336         }
5337         if ($searchtype eq 'grep') {
5338                 my ($have_grep) = gitweb_check_feature('grep');
5339                 if (!$have_grep) {
5340                         die_error('403 Permission denied', "Permission denied");
5341                 }
5342         }
5343
5344         git_header_html();
5345
5346         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5347                 my $greptype;
5348                 if ($searchtype eq 'commit') {
5349                         $greptype = "--grep=";
5350                 } elsif ($searchtype eq 'author') {
5351                         $greptype = "--author=";
5352                 } elsif ($searchtype eq 'committer') {
5353                         $greptype = "--committer=";
5354                 }
5355                 $greptype .= $searchtext;
5356                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5357                                                $greptype, '--regexp-ignore-case',
5358                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5359
5360                 my $paging_nav = '';
5361                 if ($page > 0) {
5362                         $paging_nav .=
5363                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5364                                                        searchtext=>$searchtext,
5365                                                        searchtype=>$searchtype)},
5366                                         "first");
5367                         $paging_nav .= " &sdot; " .
5368                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5369                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5370                 } else {
5371                         $paging_nav .= "first";
5372                         $paging_nav .= " &sdot; prev";
5373                 }
5374                 my $next_link = '';
5375                 if ($#commitlist >= 100) {
5376                         $next_link =
5377                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5378                                          -accesskey => "n", -title => "Alt-n"}, "next");
5379                         $paging_nav .= " &sdot; $next_link";
5380                 } else {
5381                         $paging_nav .= " &sdot; next";
5382                 }
5383
5384                 if ($#commitlist >= 100) {
5385                 }
5386
5387                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5388                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5389                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5390         }
5391
5392         if ($searchtype eq 'pickaxe') {
5393                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5394                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5395
5396                 print "<table class=\"pickaxe search\">\n";
5397                 my $alternate = 1;
5398                 $/ = "\n";
5399                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5400                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5401                         ($search_use_regexp ? '--pickaxe-regex' : ());
5402                 undef %co;
5403                 my @files;
5404                 while (my $line = <$fd>) {
5405                         chomp $line;
5406                         next unless $line;
5407
5408                         my %set = parse_difftree_raw_line($line);
5409                         if (defined $set{'commit'}) {
5410                                 # finish previous commit
5411                                 if (%co) {
5412                                         print "</td>\n" .
5413                                               "<td class=\"link\">" .
5414                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5415                                               " | " .
5416                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5417                                         print "</td>\n" .
5418                                               "</tr>\n";
5419                                 }
5420
5421                                 if ($alternate) {
5422                                         print "<tr class=\"dark\">\n";
5423                                 } else {
5424                                         print "<tr class=\"light\">\n";
5425                                 }
5426                                 $alternate ^= 1;
5427                                 %co = parse_commit($set{'commit'});
5428                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5429                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5430                                       "<td><i>$author</i></td>\n" .
5431                                       "<td>" .
5432                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5433                                               -class => "list subject"},
5434                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5435                         } elsif (defined $set{'to_id'}) {
5436                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5437
5438                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5439                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5440                                               -class => "list"},
5441                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5442                                       "<br/>\n";
5443                         }
5444                 }
5445                 close $fd;
5446
5447                 # finish last commit (warning: repetition!)
5448                 if (%co) {
5449                         print "</td>\n" .
5450                               "<td class=\"link\">" .
5451                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5452                               " | " .
5453                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5454                         print "</td>\n" .
5455                               "</tr>\n";
5456                 }
5457
5458                 print "</table>\n";
5459         }
5460
5461         if ($searchtype eq 'grep') {
5462                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5463                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5464
5465                 print "<table class=\"grep_search\">\n";
5466                 my $alternate = 1;
5467                 my $matches = 0;
5468                 $/ = "\n";
5469                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5470                         $search_use_regexp ? ('-E', '-i') : '-F',
5471                         $searchtext, $co{'tree'};
5472                 my $lastfile = '';
5473                 while (my $line = <$fd>) {
5474                         chomp $line;
5475                         my ($file, $lno, $ltext, $binary);
5476                         last if ($matches++ > 1000);
5477                         if ($line =~ /^Binary file (.+) matches$/) {
5478                                 $file = $1;
5479                                 $binary = 1;
5480                         } else {
5481                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5482                         }
5483                         if ($file ne $lastfile) {
5484                                 $lastfile and print "</td></tr>\n";
5485                                 if ($alternate++) {
5486                                         print "<tr class=\"dark\">\n";
5487                                 } else {
5488                                         print "<tr class=\"light\">\n";
5489                                 }
5490                                 print "<td class=\"list\">".
5491                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5492                                                                file_name=>"$file"),
5493                                                 -class => "list"}, esc_path($file));
5494                                 print "</td><td>\n";
5495                                 $lastfile = $file;
5496                         }
5497                         if ($binary) {
5498                                 print "<div class=\"binary\">Binary file</div>\n";
5499                         } else {
5500                                 $ltext = untabify($ltext);
5501                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5502                                         $ltext = esc_html($1, -nbsp=>1);
5503                                         $ltext .= '<span class="match">';
5504                                         $ltext .= esc_html($2, -nbsp=>1);
5505                                         $ltext .= '</span>';
5506                                         $ltext .= esc_html($3, -nbsp=>1);
5507                                 } else {
5508                                         $ltext = esc_html($ltext, -nbsp=>1);
5509                                 }
5510                                 print "<div class=\"pre\">" .
5511                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5512                                                                file_name=>"$file").'#l'.$lno,
5513                                                 -class => "linenr"}, sprintf('%4i', $lno))
5514                                         . ' ' .  $ltext . "</div>\n";
5515                         }
5516                 }
5517                 if ($lastfile) {
5518                         print "</td></tr>\n";
5519                         if ($matches > 1000) {
5520                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5521                         }
5522                 } else {
5523                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5524                 }
5525                 close $fd;
5526
5527                 print "</table>\n";
5528         }
5529         git_footer_html();
5530 }
5531
5532 sub git_search_help {
5533         git_header_html();
5534         git_print_page_nav('','', $hash,$hash,$hash);
5535         print <<EOT;
5536 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5537 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5538 the pattern entered is recognized as the POSIX extended
5539 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5540 insensitive).</p>
5541 <dl>
5542 <dt><b>commit</b></dt>
5543 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5544 EOT
5545         my ($have_grep) = gitweb_check_feature('grep');
5546         if ($have_grep) {
5547                 print <<EOT;
5548 <dt><b>grep</b></dt>
5549 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5550     a different one) are searched for the given pattern. On large trees, this search can take
5551 a while and put some strain on the server, so please use it with some consideration. Note that
5552 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5553 case-sensitive.</dd>
5554 EOT
5555         }
5556         print <<EOT;
5557 <dt><b>author</b></dt>
5558 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5559 <dt><b>committer</b></dt>
5560 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5561 EOT
5562         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5563         if ($have_pickaxe) {
5564                 print <<EOT;
5565 <dt><b>pickaxe</b></dt>
5566 <dd>All commits that caused the string to appear or disappear from any file (changes that
5567 added, removed or "modified" the string) will be listed. This search can take a while and
5568 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5569 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5570 EOT
5571         }
5572         print "</dl>\n";
5573         git_footer_html();
5574 }
5575
5576 sub git_shortlog {
5577         my $head = git_get_head_hash($project);
5578         if (!defined $hash) {
5579                 $hash = $head;
5580         }
5581         if (!defined $page) {
5582                 $page = 0;
5583         }
5584         my $refs = git_get_references();
5585
5586         my @commitlist = parse_commits($hash, 101, (100 * $page));
5587
5588         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, (100 * ($page+1)));
5589         my $next_link = '';
5590         if ($#commitlist >= 100) {
5591                 $next_link =
5592                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5593                                  -accesskey => "n", -title => "Alt-n"}, "next");
5594         }
5595
5596         git_header_html();
5597         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5598         git_print_header_div('summary', $project);
5599
5600         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5601
5602         git_footer_html();
5603 }
5604
5605 ## ......................................................................
5606 ## feeds (RSS, Atom; OPML)
5607
5608 sub git_feed {
5609         my $format = shift || 'atom';
5610         my ($have_blame) = gitweb_check_feature('blame');
5611
5612         # Atom: http://www.atomenabled.org/developers/syndication/
5613         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5614         if ($format ne 'rss' && $format ne 'atom') {
5615                 die_error(undef, "Unknown web feed format");
5616         }
5617
5618         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5619         my $head = $hash || 'HEAD';
5620         my @commitlist = parse_commits($head, 150, 0, $file_name);
5621
5622         my %latest_commit;
5623         my %latest_date;
5624         my $content_type = "application/$format+xml";
5625         if (defined $cgi->http('HTTP_ACCEPT') &&
5626                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5627                 # browser (feed reader) prefers text/xml
5628                 $content_type = 'text/xml';
5629         }
5630         if (defined($commitlist[0])) {
5631                 %latest_commit = %{$commitlist[0]};
5632                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5633                 print $cgi->header(
5634                         -type => $content_type,
5635                         -charset => 'utf-8',
5636                         -last_modified => $latest_date{'rfc2822'});
5637         } else {
5638                 print $cgi->header(
5639                         -type => $content_type,
5640                         -charset => 'utf-8');
5641         }
5642
5643         # Optimization: skip generating the body if client asks only
5644         # for Last-Modified date.
5645         return if ($cgi->request_method() eq 'HEAD');
5646
5647         # header variables
5648         my $title = "$site_name - $project/$action";
5649         my $feed_type = 'log';
5650         if (defined $hash) {
5651                 $title .= " - '$hash'";
5652                 $feed_type = 'branch log';
5653                 if (defined $file_name) {
5654                         $title .= " :: $file_name";
5655                         $feed_type = 'history';
5656                 }
5657         } elsif (defined $file_name) {
5658                 $title .= " - $file_name";
5659                 $feed_type = 'history';
5660         }
5661         $title .= " $feed_type";
5662         my $descr = git_get_project_description($project);
5663         if (defined $descr) {
5664                 $descr = esc_html($descr);
5665         } else {
5666                 $descr = "$project " .
5667                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5668                          " feed";
5669         }
5670         my $owner = git_get_project_owner($project);
5671         $owner = esc_html($owner);
5672
5673         #header
5674         my $alt_url;
5675         if (defined $file_name) {
5676                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5677         } elsif (defined $hash) {
5678                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5679         } else {
5680                 $alt_url = href(-full=>1, action=>"summary");
5681         }
5682         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5683         if ($format eq 'rss') {
5684                 print <<XML;
5685 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5686 <channel>
5687 XML
5688                 print "<title>$title</title>\n" .
5689                       "<link>$alt_url</link>\n" .
5690                       "<description>$descr</description>\n" .
5691                       "<language>en</language>\n";
5692         } elsif ($format eq 'atom') {
5693                 print <<XML;
5694 <feed xmlns="http://www.w3.org/2005/Atom">
5695 XML
5696                 print "<title>$title</title>\n" .
5697                       "<subtitle>$descr</subtitle>\n" .
5698                       '<link rel="alternate" type="text/html" href="' .
5699                       $alt_url . '" />' . "\n" .
5700                       '<link rel="self" type="' . $content_type . '" href="' .
5701                       $cgi->self_url() . '" />' . "\n" .
5702                       "<id>" . href(-full=>1) . "</id>\n" .
5703                       # use project owner for feed author
5704                       "<author><name>$owner</name></author>\n";
5705                 if (defined $favicon) {
5706                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5707                 }
5708                 if (defined $logo_url) {
5709                         # not twice as wide as tall: 72 x 27 pixels
5710                         print "<logo>" . esc_url($logo) . "</logo>\n";
5711                 }
5712                 if (! %latest_date) {
5713                         # dummy date to keep the feed valid until commits trickle in:
5714                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5715                 } else {
5716                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5717                 }
5718         }
5719
5720         # contents
5721         for (my $i = 0; $i <= $#commitlist; $i++) {
5722                 my %co = %{$commitlist[$i]};
5723                 my $commit = $co{'id'};
5724                 # we read 150, we always show 30 and the ones more recent than 48 hours
5725                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5726                         last;
5727                 }
5728                 my %cd = parse_date($co{'author_epoch'});
5729
5730                 # get list of changed files
5731                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5732                         $co{'parent'} || "--root",
5733                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5734                         or next;
5735                 my @difftree = map { chomp; $_ } <$fd>;
5736                 close $fd
5737                         or next;
5738
5739                 # print element (entry, item)
5740                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5741                 if ($format eq 'rss') {
5742                         print "<item>\n" .
5743                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5744                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5745                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5746                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5747                               "<link>$co_url</link>\n" .
5748                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5749                               "<content:encoded>" .
5750                               "<![CDATA[\n";
5751                 } elsif ($format eq 'atom') {
5752                         print "<entry>\n" .
5753                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5754                               "<updated>$cd{'iso-8601'}</updated>\n" .
5755                               "<author>\n" .
5756                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5757                         if ($co{'author_email'}) {
5758                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5759                         }
5760                         print "</author>\n" .
5761                               # use committer for contributor
5762                               "<contributor>\n" .
5763                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5764                         if ($co{'committer_email'}) {
5765                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5766                         }
5767                         print "</contributor>\n" .
5768                               "<published>$cd{'iso-8601'}</published>\n" .
5769                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5770                               "<id>$co_url</id>\n" .
5771                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5772                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5773                 }
5774                 my $comment = $co{'comment'};
5775                 print "<pre>\n";
5776                 foreach my $line (@$comment) {
5777                         $line = esc_html($line);
5778                         print "$line\n";
5779                 }
5780                 print "</pre><ul>\n";
5781                 foreach my $difftree_line (@difftree) {
5782                         my %difftree = parse_difftree_raw_line($difftree_line);
5783                         next if !$difftree{'from_id'};
5784
5785                         my $file = $difftree{'file'} || $difftree{'to_file'};
5786
5787                         print "<li>" .
5788                               "[" .
5789                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5790                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5791                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5792                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5793                                       -title => "diff"}, 'D');
5794                         if ($have_blame) {
5795                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5796                                                              file_name=>$file, hash_base=>$commit),
5797                                               -title => "blame"}, 'B');
5798                         }
5799                         # if this is not a feed of a file history
5800                         if (!defined $file_name || $file_name ne $file) {
5801                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5802                                                              file_name=>$file, hash=>$commit),
5803                                               -title => "history"}, 'H');
5804                         }
5805                         $file = esc_path($file);
5806                         print "] ".
5807                               "$file</li>\n";
5808                 }
5809                 if ($format eq 'rss') {
5810                         print "</ul>]]>\n" .
5811                               "</content:encoded>\n" .
5812                               "</item>\n";
5813                 } elsif ($format eq 'atom') {
5814                         print "</ul>\n</div>\n" .
5815                               "</content>\n" .
5816                               "</entry>\n";
5817                 }
5818         }
5819
5820         # end of feed
5821         if ($format eq 'rss') {
5822                 print "</channel>\n</rss>\n";
5823         }       elsif ($format eq 'atom') {
5824                 print "</feed>\n";
5825         }
5826 }
5827
5828 sub git_rss {
5829         git_feed('rss');
5830 }
5831
5832 sub git_atom {
5833         git_feed('atom');
5834 }
5835
5836 sub git_opml {
5837         my @list = git_get_projects_list();
5838
5839         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5840         print <<XML;
5841 <?xml version="1.0" encoding="utf-8"?>
5842 <opml version="1.0">
5843 <head>
5844   <title>$site_name OPML Export</title>
5845 </head>
5846 <body>
5847 <outline text="git RSS feeds">
5848 XML
5849
5850         foreach my $pr (@list) {
5851                 my %proj = %$pr;
5852                 my $head = git_get_head_hash($proj{'path'});
5853                 if (!defined $head) {
5854                         next;
5855                 }
5856                 $git_dir = "$projectroot/$proj{'path'}";
5857                 my %co = parse_commit($head);
5858                 if (!%co) {
5859                         next;
5860                 }
5861
5862                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5863                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5864                 my $html = "$my_url?p=$proj{'path'};a=summary";
5865                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5866         }
5867         print <<XML;
5868 </outline>
5869 </body>
5870 </opml>
5871 XML
5872 }