Lady’s Gitweb - Gitweb/blob - 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 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 if (my $path_info = $ENV{"PATH_INFO"}) {
  33         $my_url =~ s,\Q$path_info\E$,,;
  34         $my_uri =~ s,\Q$path_info\E$,,;
  35 }
  36
  37 # core git executable to use
  38 # this can just be "git" if your webserver has a sensible PATH
  39 our $GIT = "++GIT_BINDIR++/git";
  40
  41 # absolute fs-path which will be prepended to the project path
  42 #our $projectroot = "/pub/scm";
  43 our $projectroot = "++GITWEB_PROJECTROOT++";
  44
  45 # fs traversing limit for getting project list
  46 # the number is relative to the projectroot
  47 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  48
  49 # target of the home link on top of all pages
  50 our $home_link = $my_uri || "/";
  51
  52 # string of the home link on top of all pages
  53 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  54
  55 # name of your site or organization to appear in page titles
  56 # replace this with something more descriptive for clearer bookmarks
  57 our $site_name = "++GITWEB_SITENAME++"
  58                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  59
  60 # filename of html text to include at top of each page
  61 our $site_header = "++GITWEB_SITE_HEADER++";
  62 # html text to include at home page
  63 our $home_text = "++GITWEB_HOMETEXT++";
  64 # filename of html text to include at bottom of each page
  65 our $site_footer = "++GITWEB_SITE_FOOTER++";
  66
  67 # URI of stylesheets
  68 our @stylesheets = ("++GITWEB_CSS++");
  69 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  70 our $stylesheet = undef;
  71
  72 # URI of GIT logo (72x27 size)
  73 our $logo = "++GITWEB_LOGO++";
  74 # URI of GIT favicon, assumed to be image/png type
  75 our $favicon = "++GITWEB_FAVICON++";
  76
  77 # URI and label (title) of GIT logo link
  78 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  79 #our $logo_label = "git documentation";
  80 our $logo_url = "http://git.or.cz/";
  81 our $logo_label = "git homepage";
  82
  83 # source of projects list
  84 our $projects_list = "++GITWEB_LIST++";
  85
  86 # the width (in characters) of the projects list "Description" column
  87 our $projects_list_description_width = 25;
  88
  89 # default order of projects list
  90 # valid values are none, project, descr, owner, and age
  91 our $default_projects_order = "project";
  92
  93 # show repository only if this file exists
  94 # (only effective if this variable evaluates to true)
  95 our $export_ok = "++GITWEB_EXPORT_OK++";
  96
  97 # only allow viewing of repositories also shown on the overview page
  98 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  99
 100 # list of git base URLs used for URL to where fetch project from,
 101 # i.e. full URL is "$git_base_url/$project"
 102 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 103
 104 # default blob_plain mimetype and default charset for text/plain blob
 105 our $default_blob_plain_mimetype = 'text/plain';
 106 our $default_text_plain_charset  = undef;
 107
 108 # file to use for guessing MIME types before trying /etc/mime.types
 109 # (relative to the current git repository)
 110 our $mimetypes_file = undef;
 111
 112 # assume this charset if line contains non-UTF-8 characters;
 113 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 114 # for which encoding all byte sequences are valid, for example
 115 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 116 # could be even 'utf-8' for the old behavior)
 117 our $fallback_encoding = 'latin1';
 118
 119 # rename detection options for git-diff and git-diff-tree
 120 # - default is '-M', with the cost proportional to
 121 #   (number of removed files) * (number of new files).
 122 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 123 #   (number of changed files + number of removed files) * (number of new files)
 124 # - even more costly is '-C', '--find-copies-harder' with cost
 125 #   (number of files in the original tree) * (number of new files)
 126 # - one might want to include '-B' option, e.g. '-B', '-M'
 127 our @diff_opts = ('-M'); # taken from git_commit
 128
 129 # information about snapshot formats that gitweb is capable of serving
 130 our %known_snapshot_formats = (
 131         # name => {
 132         #       'display' => display name,
 133         #       'type' => mime type,
 134         #       'suffix' => filename suffix,
 135         #       'format' => --format for git-archive,
 136         #       'compressor' => [compressor command and arguments]
 137         #                       (array reference, optional)}
 138         #
 139         'tgz' => {
 140                 'display' => 'tar.gz',
 141                 'type' => 'application/x-gzip',
 142                 'suffix' => '.tar.gz',
 143                 'format' => 'tar',
 144                 'compressor' => ['gzip']},
 145
 146         'tbz2' => {
 147                 'display' => 'tar.bz2',
 148                 'type' => 'application/x-bzip2',
 149                 'suffix' => '.tar.bz2',
 150                 'format' => 'tar',
 151                 'compressor' => ['bzip2']},
 152
 153         'zip' => {
 154                 'display' => 'zip',
 155                 'type' => 'application/x-zip',
 156                 'suffix' => '.zip',
 157                 'format' => 'zip'},
 158 );
 159
 160 # Aliases so we understand old gitweb.snapshot values in repository
 161 # configuration.
 162 our %known_snapshot_format_aliases = (
 163         'gzip'  => 'tgz',
 164         'bzip2' => 'tbz2',
 165
 166         # backward compatibility: legacy gitweb config support
 167         'x-gzip' => undef, 'gz' => undef,
 168         'x-bzip2' => undef, 'bz2' => undef,
 169         'x-zip' => undef, '' => undef,
 170 );
 171
 172 # You define site-wide feature defaults here; override them with
 173 # $GITWEB_CONFIG as necessary.
 174 our %feature = (
 175         # feature => {
 176         #       'sub' => feature-sub (subroutine),
 177         #       'override' => allow-override (boolean),
 178         #       'default' => [ default options...] (array reference)}
 179         #
 180         # if feature is overridable (it means that allow-override has true value),
 181         # then feature-sub will be called with default options as parameters;
 182         # return value of feature-sub indicates if to enable specified feature
 183         #
 184         # if there is no 'sub' key (no feature-sub), then feature cannot be
 185         # overriden
 186         #
 187         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 188
 189         # Enable the 'blame' blob view, showing the last commit that modified
 190         # each line in the file. This can be very CPU-intensive.
 191
 192         # To enable system wide have in $GITWEB_CONFIG
 193         # $feature{'blame'}{'default'} = [1];
 194         # To have project specific config enable override in $GITWEB_CONFIG
 195         # $feature{'blame'}{'override'} = 1;
 196         # and in project config gitweb.blame = 0|1;
 197         'blame' => {
 198                 'sub' => \&feature_blame,
 199                 'override' => 0,
 200                 'default' => [0]},
 201
 202         # Enable the 'snapshot' link, providing a compressed archive of any
 203         # tree. This can potentially generate high traffic if you have large
 204         # project.
 205
 206         # Value is a list of formats defined in %known_snapshot_formats that
 207         # you wish to offer.
 208         # To disable system wide have in $GITWEB_CONFIG
 209         # $feature{'snapshot'}{'default'} = [];
 210         # To have project specific config enable override in $GITWEB_CONFIG
 211         # $feature{'snapshot'}{'override'} = 1;
 212         # and in project config, a comma-separated list of formats or "none"
 213         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 214         'snapshot' => {
 215                 'sub' => \&feature_snapshot,
 216                 'override' => 0,
 217                 'default' => ['tgz']},
 218
 219         # Enable text search, which will list the commits which match author,
 220         # committer or commit text to a given string.  Enabled by default.
 221         # Project specific override is not supported.
 222         'search' => {
 223                 'override' => 0,
 224                 'default' => [1]},
 225
 226         # Enable grep search, which will list the files in currently selected
 227         # tree containing the given string. Enabled by default. This can be
 228         # potentially CPU-intensive, of course.
 229
 230         # To enable system wide have in $GITWEB_CONFIG
 231         # $feature{'grep'}{'default'} = [1];
 232         # To have project specific config enable override in $GITWEB_CONFIG
 233         # $feature{'grep'}{'override'} = 1;
 234         # and in project config gitweb.grep = 0|1;
 235         'grep' => {
 236                 'override' => 0,
 237                 'default' => [1]},
 238
 239         # Enable the pickaxe search, which will list the commits that modified
 240         # a given string in a file. This can be practical and quite faster
 241         # alternative to 'blame', but still potentially CPU-intensive.
 242
 243         # To enable system wide have in $GITWEB_CONFIG
 244         # $feature{'pickaxe'}{'default'} = [1];
 245         # To have project specific config enable override in $GITWEB_CONFIG
 246         # $feature{'pickaxe'}{'override'} = 1;
 247         # and in project config gitweb.pickaxe = 0|1;
 248         'pickaxe' => {
 249                 'sub' => \&feature_pickaxe,
 250                 'override' => 0,
 251                 'default' => [1]},
 252
 253         # Make gitweb use an alternative format of the URLs which can be
 254         # more readable and natural-looking: project name is embedded
 255         # directly in the path and the query string contains other
 256         # auxiliary information. All gitweb installations recognize
 257         # URL in either format; this configures in which formats gitweb
 258         # generates links.
 259
 260         # To enable system wide have in $GITWEB_CONFIG
 261         # $feature{'pathinfo'}{'default'} = [1];
 262         # Project specific override is not supported.
 263
 264         # Note that you will need to change the default location of CSS,
 265         # favicon, logo and possibly other files to an absolute URL. Also,
 266         # if gitweb.cgi serves as your indexfile, you will need to force
 267         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 268         'pathinfo' => {
 269                 'override' => 0,
 270                 'default' => [0]},
 271
 272         # Make gitweb consider projects in project root subdirectories
 273         # to be forks of existing projects. Given project $projname.git,
 274         # projects matching $projname/*.git will not be shown in the main
 275         # projects list, instead a '+' mark will be added to $projname
 276         # there and a 'forks' view will be enabled for the project, listing
 277         # all the forks. If project list is taken from a file, forks have
 278         # to be listed after the main project.
 279
 280         # To enable system wide have in $GITWEB_CONFIG
 281         # $feature{'forks'}{'default'} = [1];
 282         # Project specific override is not supported.
 283         'forks' => {
 284                 'override' => 0,
 285                 'default' => [0]},
 286
 287         # Insert custom links to the action bar of all project pages.
 288         # This enables you mainly to link to third-party scripts integrating
 289         # into gitweb; e.g. git-browser for graphical history representation
 290         # or custom web-based repository administration interface.
 291
 292         # The 'default' value consists of a list of triplets in the form
 293         # (label, link, position) where position is the label after which
 294         # to inster the link and link is a format string where %n expands
 295         # to the project name, %f to the project path within the filesystem,
 296         # %h to the current hash (h gitweb parameter) and %b to the current
 297         # hash base (hb gitweb parameter).
 298
 299         # To enable system wide have in $GITWEB_CONFIG e.g.
 300         # $feature{'actions'}{'default'} = [('graphiclog',
 301         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 302         # Project specific override is not supported.
 303         'actions' => {
 304                 'override' => 0,
 305                 'default' => []},
 306
 307         # Allow gitweb scan project content tags described in ctags/
 308         # of project repository, and display the popular Web 2.0-ish
 309         # "tag cloud" near the project list. Note that this is something
 310         # COMPLETELY different from the normal Git tags.
 311
 312         # gitweb by itself can show existing tags, but it does not handle
 313         # tagging itself; you need an external application for that.
 314         # For an example script, check Girocco's cgi/tagproj.cgi.
 315         # You may want to install the HTML::TagCloud Perl module to get
 316         # a pretty tag cloud instead of just a list of tags.
 317
 318         # To enable system wide have in $GITWEB_CONFIG
 319         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 320         # Project specific override is not supported.
 321         'ctags' => {
 322                 'override' => 0,
 323                 'default' => [0]},
 324 );
 325
 326 sub gitweb_check_feature {
 327         my ($name) = @_;
 328         return unless exists $feature{$name};
 329         my ($sub, $override, @defaults) = (
 330                 $feature{$name}{'sub'},
 331                 $feature{$name}{'override'},
 332                 @{$feature{$name}{'default'}});
 333         if (!$override) { return @defaults; }
 334         if (!defined $sub) {
 335                 warn "feature $name is not overrideable";
 336                 return @defaults;
 337         }
 338         return $sub->(@defaults);
 339 }
 340
 341 sub feature_blame {
 342         my ($val) = git_get_project_config('blame', '--bool');
 343
 344         if ($val eq 'true') {
 345                 return 1;
 346         } elsif ($val eq 'false') {
 347                 return 0;
 348         }
 349
 350         return $_[0];
 351 }
 352
 353 sub feature_snapshot {
 354         my (@fmts) = @_;
 355
 356         my ($val) = git_get_project_config('snapshot');
 357
 358         if ($val) {
 359                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 360         }
 361
 362         return @fmts;
 363 }
 364
 365 sub feature_grep {
 366         my ($val) = git_get_project_config('grep', '--bool');
 367
 368         if ($val eq 'true') {
 369                 return (1);
 370         } elsif ($val eq 'false') {
 371                 return (0);
 372         }
 373
 374         return ($_[0]);
 375 }
 376
 377 sub feature_pickaxe {
 378         my ($val) = git_get_project_config('pickaxe', '--bool');
 379
 380         if ($val eq 'true') {
 381                 return (1);
 382         } elsif ($val eq 'false') {
 383                 return (0);
 384         }
 385
 386         return ($_[0]);
 387 }
 388
 389 # checking HEAD file with -e is fragile if the repository was
 390 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 391 # and then pruned.
 392 sub check_head_link {
 393         my ($dir) = @_;
 394         my $headfile = "$dir/HEAD";
 395         return ((-e $headfile) ||
 396                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 397 }
 398
 399 sub check_export_ok {
 400         my ($dir) = @_;
 401         return (check_head_link($dir) &&
 402                 (!$export_ok || -e "$dir/$export_ok"));
 403 }
 404
 405 # process alternate names for backward compatibility
 406 # filter out unsupported (unknown) snapshot formats
 407 sub filter_snapshot_fmts {
 408         my @fmts = @_;
 409
 410         @fmts = map {
 411                 exists $known_snapshot_format_aliases{$_} ?
 412                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 413         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 414
 415 }
 416
 417 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 418 if (-e $GITWEB_CONFIG) {
 419         do $GITWEB_CONFIG;
 420 } else {
 421         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 422         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 423 }
 424
 425 # version of the core git binary
 426 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 427
 428 $projects_list ||= $projectroot;
 429
 430 # ======================================================================
 431 # input validation and dispatch
 432 our $action = $cgi->param('a');
 433 if (defined $action) {
 434         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 435                 die_error(400, "Invalid action parameter");
 436         }
 437 }
 438
 439 # parameters which are pathnames
 440 our $project = $cgi->param('p');
 441 if (defined $project) {
 442         if (!validate_pathname($project) ||
 443             !(-d "$projectroot/$project") ||
 444             !check_head_link("$projectroot/$project") ||
 445             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 446             ($strict_export && !project_in_list($project))) {
 447                 undef $project;
 448                 die_error(404, "No such project");
 449         }
 450 }
 451
 452 our $file_name = $cgi->param('f');
 453 if (defined $file_name) {
 454         if (!validate_pathname($file_name)) {
 455                 die_error(400, "Invalid file parameter");
 456         }
 457 }
 458
 459 our $file_parent = $cgi->param('fp');
 460 if (defined $file_parent) {
 461         if (!validate_pathname($file_parent)) {
 462                 die_error(400, "Invalid file parent parameter");
 463         }
 464 }
 465
 466 # parameters which are refnames
 467 our $hash = $cgi->param('h');
 468 if (defined $hash) {
 469         if (!validate_refname($hash)) {
 470                 die_error(400, "Invalid hash parameter");
 471         }
 472 }
 473
 474 our $hash_parent = $cgi->param('hp');
 475 if (defined $hash_parent) {
 476         if (!validate_refname($hash_parent)) {
 477                 die_error(400, "Invalid hash parent parameter");
 478         }
 479 }
 480
 481 our $hash_base = $cgi->param('hb');
 482 if (defined $hash_base) {
 483         if (!validate_refname($hash_base)) {
 484                 die_error(400, "Invalid hash base parameter");
 485         }
 486 }
 487
 488 my %allowed_options = (
 489         "--no-merges" => [ qw(rss atom log shortlog history) ],
 490 );
 491
 492 our @extra_options = $cgi->param('opt');
 493 if (defined @extra_options) {
 494         foreach my $opt (@extra_options) {
 495                 if (not exists $allowed_options{$opt}) {
 496                         die_error(400, "Invalid option parameter");
 497                 }
 498                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 499                         die_error(400, "Invalid option parameter for this action");
 500                 }
 501         }
 502 }
 503
 504 our $hash_parent_base = $cgi->param('hpb');
 505 if (defined $hash_parent_base) {
 506         if (!validate_refname($hash_parent_base)) {
 507                 die_error(400, "Invalid hash parent base parameter");
 508         }
 509 }
 510
 511 # other parameters
 512 our $page = $cgi->param('pg');
 513 if (defined $page) {
 514         if ($page =~ m/[^0-9]/) {
 515                 die_error(400, "Invalid page parameter");
 516         }
 517 }
 518
 519 our $searchtype = $cgi->param('st');
 520 if (defined $searchtype) {
 521         if ($searchtype =~ m/[^a-z]/) {
 522                 die_error(400, "Invalid searchtype parameter");
 523         }
 524 }
 525
 526 our $search_use_regexp = $cgi->param('sr');
 527
 528 our $searchtext = $cgi->param('s');
 529 our $search_regexp;
 530 if (defined $searchtext) {
 531         if (length($searchtext) < 2) {
 532                 die_error(403, "At least two characters are required for search parameter");
 533         }
 534         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 535 }
 536
 537 # now read PATH_INFO and use it as alternative to parameters
 538 sub evaluate_path_info {
 539         return if defined $project;
 540         my $path_info = $ENV{"PATH_INFO"};
 541         return if !$path_info;
 542         $path_info =~ s,^/+,,;
 543         return if !$path_info;
 544         # find which part of PATH_INFO is project
 545         $project = $path_info;
 546         $project =~ s,/+$,,;
 547         while ($project && !check_head_link("$projectroot/$project")) {
 548                 $project =~ s,/*[^/]*$,,;
 549         }
 550         # validate project
 551         $project = validate_pathname($project);
 552         if (!$project ||
 553             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 554             ($strict_export && !project_in_list($project))) {
 555                 undef $project;
 556                 return;
 557         }
 558         # do not change any parameters if an action is given using the query string
 559         return if $action;
 560         $path_info =~ s,^\Q$project\E/*,,;
 561         my ($refname, $pathname) = split(/:/, $path_info, 2);
 562         if (defined $pathname) {
 563                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 564                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 565                 $pathname =~ s,^/+,,;
 566                 if (!$pathname || substr($pathname, -1) eq "/") {
 567                         $action  ||= "tree";
 568                         $pathname =~ s,/$,,;
 569                 } else {
 570                         $action  ||= "blob_plain";
 571                 }
 572                 $hash_base ||= validate_refname($refname);
 573                 $file_name ||= validate_pathname($pathname);
 574         } elsif (defined $refname) {
 575                 # we got "project.git/branch"
 576                 $action ||= "shortlog";
 577                 $hash   ||= validate_refname($refname);
 578         }
 579 }
 580 evaluate_path_info();
 581
 582 # path to the current git repository
 583 our $git_dir;
 584 $git_dir = "$projectroot/$project" if $project;
 585
 586 # dispatch
 587 my %actions = (
 588         "blame" => \&git_blame,
 589         "blobdiff" => \&git_blobdiff,
 590         "blobdiff_plain" => \&git_blobdiff_plain,
 591         "blob" => \&git_blob,
 592         "blob_plain" => \&git_blob_plain,
 593         "commitdiff" => \&git_commitdiff,
 594         "commitdiff_plain" => \&git_commitdiff_plain,
 595         "commit" => \&git_commit,
 596         "forks" => \&git_forks,
 597         "heads" => \&git_heads,
 598         "history" => \&git_history,
 599         "log" => \&git_log,
 600         "rss" => \&git_rss,
 601         "atom" => \&git_atom,
 602         "search" => \&git_search,
 603         "search_help" => \&git_search_help,
 604         "shortlog" => \&git_shortlog,
 605         "summary" => \&git_summary,
 606         "tag" => \&git_tag,
 607         "tags" => \&git_tags,
 608         "tree" => \&git_tree,
 609         "snapshot" => \&git_snapshot,
 610         "object" => \&git_object,
 611         # those below don't need $project
 612         "opml" => \&git_opml,
 613         "project_list" => \&git_project_list,
 614         "project_index" => \&git_project_index,
 615 );
 616
 617 if (!defined $action) {
 618         if (defined $hash) {
 619                 $action = git_get_type($hash);
 620         } elsif (defined $hash_base && defined $file_name) {
 621                 $action = git_get_type("$hash_base:$file_name");
 622         } elsif (defined $project) {
 623                 $action = 'summary';
 624         } else {
 625                 $action = 'project_list';
 626         }
 627 }
 628 if (!defined($actions{$action})) {
 629         die_error(400, "Unknown action");
 630 }
 631 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 632     !$project) {
 633         die_error(400, "Project needed");
 634 }
 635 $actions{$action}->();
 636 exit;
 637
 638 ## ======================================================================
 639 ## action links
 640
 641 sub href (%) {
 642         my %params = @_;
 643         # default is to use -absolute url() i.e. $my_uri
 644         my $href = $params{-full} ? $my_url : $my_uri;
 645
 646         # XXX: Warning: If you touch this, check the search form for updating,
 647         # too.
 648
 649         my @mapping = (
 650                 project => "p",
 651                 action => "a",
 652                 file_name => "f",
 653                 file_parent => "fp",
 654                 hash => "h",
 655                 hash_parent => "hp",
 656                 hash_base => "hb",
 657                 hash_parent_base => "hpb",
 658                 page => "pg",
 659                 order => "o",
 660                 searchtext => "s",
 661                 searchtype => "st",
 662                 snapshot_format => "sf",
 663                 extra_options => "opt",
 664                 search_use_regexp => "sr",
 665         );
 666         my %mapping = @mapping;
 667
 668         $params{'project'} = $project unless exists $params{'project'};
 669
 670         if ($params{-replay}) {
 671                 while (my ($name, $symbol) = each %mapping) {
 672                         if (!exists $params{$name}) {
 673                                 # to allow for multivalued params we use arrayref form
 674                                 $params{$name} = [ $cgi->param($symbol) ];
 675                         }
 676                 }
 677         }
 678
 679         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 680         if ($use_pathinfo) {
 681                 # use PATH_INFO for project name
 682                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 683                 delete $params{'project'};
 684
 685                 # Summary just uses the project path URL
 686                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 687                         delete $params{'action'};
 688                 }
 689         }
 690
 691         # now encode the parameters explicitly
 692         my @result = ();
 693         for (my $i = 0; $i < @mapping; $i += 2) {
 694                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 695                 if (defined $params{$name}) {
 696                         if (ref($params{$name}) eq "ARRAY") {
 697                                 foreach my $par (@{$params{$name}}) {
 698                                         push @result, $symbol . "=" . esc_param($par);
 699                                 }
 700                         } else {
 701                                 push @result, $symbol . "=" . esc_param($params{$name});
 702                         }
 703                 }
 704         }
 705         $href .= "?" . join(';', @result) if scalar @result;
 706
 707         return $href;
 708 }
 709
 710
 711 ## ======================================================================
 712 ## validation, quoting/unquoting and escaping
 713
 714 sub validate_pathname {
 715         my $input = shift || return undef;
 716
 717         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 718         # at the beginning, at the end, and between slashes.
 719         # also this catches doubled slashes
 720         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 721                 return undef;
 722         }
 723         # no null characters
 724         if ($input =~ m!\0!) {
 725                 return undef;
 726         }
 727         return $input;
 728 }
 729
 730 sub validate_refname {
 731         my $input = shift || return undef;
 732
 733         # textual hashes are O.K.
 734         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 735                 return $input;
 736         }
 737         # it must be correct pathname
 738         $input = validate_pathname($input)
 739                 or return undef;
 740         # restrictions on ref name according to git-check-ref-format
 741         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 742                 return undef;
 743         }
 744         return $input;
 745 }
 746
 747 # decode sequences of octets in utf8 into Perl's internal form,
 748 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 749 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 750 sub to_utf8 {
 751         my $str = shift;
 752         if (utf8::valid($str)) {
 753                 utf8::decode($str);
 754                 return $str;
 755         } else {
 756                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 757         }
 758 }
 759
 760 # quote unsafe chars, but keep the slash, even when it's not
 761 # correct, but quoted slashes look too horrible in bookmarks
 762 sub esc_param {
 763         my $str = shift;
 764         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 765         $str =~ s/\+/%2B/g;
 766         $str =~ s/ /\+/g;
 767         return $str;
 768 }
 769
 770 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 771 sub esc_url {
 772         my $str = shift;
 773         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 774         $str =~ s/\+/%2B/g;
 775         $str =~ s/ /\+/g;
 776         return $str;
 777 }
 778
 779 # replace invalid utf8 character with SUBSTITUTION sequence
 780 sub esc_html ($;%) {
 781         my $str = shift;
 782         my %opts = @_;
 783
 784         $str = to_utf8($str);
 785         $str = $cgi->escapeHTML($str);
 786         if ($opts{'-nbsp'}) {
 787                 $str =~ s/ /&nbsp;/g;
 788         }
 789         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 790         return $str;
 791 }
 792
 793 # quote control characters and escape filename to HTML
 794 sub esc_path {
 795         my $str = shift;
 796         my %opts = @_;
 797
 798         $str = to_utf8($str);
 799         $str = $cgi->escapeHTML($str);
 800         if ($opts{'-nbsp'}) {
 801                 $str =~ s/ /&nbsp;/g;
 802         }
 803         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 804         return $str;
 805 }
 806
 807 # Make control characters "printable", using character escape codes (CEC)
 808 sub quot_cec {
 809         my $cntrl = shift;
 810         my %opts = @_;
 811         my %es = ( # character escape codes, aka escape sequences
 812                 "\t" => '\t',   # tab            (HT)
 813                 "\n" => '\n',   # line feed      (LF)
 814                 "\r" => '\r',   # carrige return (CR)
 815                 "\f" => '\f',   # form feed      (FF)
 816                 "\b" => '\b',   # backspace      (BS)
 817                 "\a" => '\a',   # alarm (bell)   (BEL)
 818                 "\e" => '\e',   # escape         (ESC)
 819                 "\013" => '\v', # vertical tab   (VT)
 820                 "\000" => '\0', # nul character  (NUL)
 821         );
 822         my $chr = ( (exists $es{$cntrl})
 823                     ? $es{$cntrl}
 824                     : sprintf('\%2x', ord($cntrl)) );
 825         if ($opts{-nohtml}) {
 826                 return $chr;
 827         } else {
 828                 return "<span class=\"cntrl\">$chr</span>";
 829         }
 830 }
 831
 832 # Alternatively use unicode control pictures codepoints,
 833 # Unicode "printable representation" (PR)
 834 sub quot_upr {
 835         my $cntrl = shift;
 836         my %opts = @_;
 837
 838         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 839         if ($opts{-nohtml}) {
 840                 return $chr;
 841         } else {
 842                 return "<span class=\"cntrl\">$chr</span>";
 843         }
 844 }
 845
 846 # git may return quoted and escaped filenames
 847 sub unquote {
 848         my $str = shift;
 849
 850         sub unq {
 851                 my $seq = shift;
 852                 my %es = ( # character escape codes, aka escape sequences
 853                         't' => "\t",   # tab            (HT, TAB)
 854                         'n' => "\n",   # newline        (NL)
 855                         'r' => "\r",   # return         (CR)
 856                         'f' => "\f",   # form feed      (FF)
 857                         'b' => "\b",   # backspace      (BS)
 858                         'a' => "\a",   # alarm (bell)   (BEL)
 859                         'e' => "\e",   # escape         (ESC)
 860                         'v' => "\013", # vertical tab   (VT)
 861                 );
 862
 863                 if ($seq =~ m/^[0-7]{1,3}$/) {
 864                         # octal char sequence
 865                         return chr(oct($seq));
 866                 } elsif (exists $es{$seq}) {
 867                         # C escape sequence, aka character escape code
 868                         return $es{$seq};
 869                 }
 870                 # quoted ordinary character
 871                 return $seq;
 872         }
 873
 874         if ($str =~ m/^"(.*)"$/) {
 875                 # needs unquoting
 876                 $str = $1;
 877                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 878         }
 879         return $str;
 880 }
 881
 882 # escape tabs (convert tabs to spaces)
 883 sub untabify {
 884         my $line = shift;
 885
 886         while ((my $pos = index($line, "\t")) != -1) {
 887                 if (my $count = (8 - ($pos % 8))) {
 888                         my $spaces = ' ' x $count;
 889                         $line =~ s/\t/$spaces/;
 890                 }
 891         }
 892
 893         return $line;
 894 }
 895
 896 sub project_in_list {
 897         my $project = shift;
 898         my @list = git_get_projects_list();
 899         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 900 }
 901
 902 ## ----------------------------------------------------------------------
 903 ## HTML aware string manipulation
 904
 905 # Try to chop given string on a word boundary between position
 906 # $len and $len+$add_len. If there is no word boundary there,
 907 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 908 # (marking chopped part) would be longer than given string.
 909 sub chop_str {
 910         my $str = shift;
 911         my $len = shift;
 912         my $add_len = shift || 10;
 913         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 914
 915         # Make sure perl knows it is utf8 encoded so we don't
 916         # cut in the middle of a utf8 multibyte char.
 917         $str = to_utf8($str);
 918
 919         # allow only $len chars, but don't cut a word if it would fit in $add_len
 920         # if it doesn't fit, cut it if it's still longer than the dots we would add
 921         # remove chopped character entities entirely
 922
 923         # when chopping in the middle, distribute $len into left and right part
 924         # return early if chopping wouldn't make string shorter
 925         if ($where eq 'center') {
 926                 return $str if ($len + 5 >= length($str)); # filler is length 5
 927                 $len = int($len/2);
 928         } else {
 929                 return $str if ($len + 4 >= length($str)); # filler is length 4
 930         }
 931
 932         # regexps: ending and beginning with word part up to $add_len
 933         my $endre = qr/.{$len}\w{0,$add_len}/;
 934         my $begre = qr/\w{0,$add_len}.{$len}/;
 935
 936         if ($where eq 'left') {
 937                 $str =~ m/^(.*?)($begre)$/;
 938                 my ($lead, $body) = ($1, $2);
 939                 if (length($lead) > 4) {
 940                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 941                         $lead = " ...";
 942                 }
 943                 return "$lead$body";
 944
 945         } elsif ($where eq 'center') {
 946                 $str =~ m/^($endre)(.*)$/;
 947                 my ($left, $str)  = ($1, $2);
 948                 $str =~ m/^(.*?)($begre)$/;
 949                 my ($mid, $right) = ($1, $2);
 950                 if (length($mid) > 5) {
 951                         $left  =~ s/&[^;]*$//;
 952                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 953                         $mid = " ... ";
 954                 }
 955                 return "$left$mid$right";
 956
 957         } else {
 958                 $str =~ m/^($endre)(.*)$/;
 959                 my $body = $1;
 960                 my $tail = $2;
 961                 if (length($tail) > 4) {
 962                         $body =~ s/&[^;]*$//;
 963                         $tail = "... ";
 964                 }
 965                 return "$body$tail";
 966         }
 967 }
 968
 969 # takes the same arguments as chop_str, but also wraps a <span> around the
 970 # result with a title attribute if it does get chopped. Additionally, the
 971 # string is HTML-escaped.
 972 sub chop_and_escape_str {
 973         my ($str) = @_;
 974
 975         my $chopped = chop_str(@_);
 976         if ($chopped eq $str) {
 977                 return esc_html($chopped);
 978         } else {
 979                 $str =~ s/([[:cntrl:]])/?/g;
 980                 return $cgi->span({-title=>$str}, esc_html($chopped));
 981         }
 982 }
 983
 984 ## ----------------------------------------------------------------------
 985 ## functions returning short strings
 986
 987 # CSS class for given age value (in seconds)
 988 sub age_class {
 989         my $age = shift;
 990
 991         if (!defined $age) {
 992                 return "noage";
 993         } elsif ($age < 60*60*2) {
 994                 return "age0";
 995         } elsif ($age < 60*60*24*2) {
 996                 return "age1";
 997         } else {
 998                 return "age2";
 999         }
1000 }
1001
1002 # convert age in seconds to "nn units ago" string
1003 sub age_string {
1004         my $age = shift;
1005         my $age_str;
1006
1007         if ($age > 60*60*24*365*2) {
1008                 $age_str = (int $age/60/60/24/365);
1009                 $age_str .= " years ago";
1010         } elsif ($age > 60*60*24*(365/12)*2) {
1011                 $age_str = int $age/60/60/24/(365/12);
1012                 $age_str .= " months ago";
1013         } elsif ($age > 60*60*24*7*2) {
1014                 $age_str = int $age/60/60/24/7;
1015                 $age_str .= " weeks ago";
1016         } elsif ($age > 60*60*24*2) {
1017                 $age_str = int $age/60/60/24;
1018                 $age_str .= " days ago";
1019         } elsif ($age > 60*60*2) {
1020                 $age_str = int $age/60/60;
1021                 $age_str .= " hours ago";
1022         } elsif ($age > 60*2) {
1023                 $age_str = int $age/60;
1024                 $age_str .= " min ago";
1025         } elsif ($age > 2) {
1026                 $age_str = int $age;
1027                 $age_str .= " sec ago";
1028         } else {
1029                 $age_str .= " right now";
1030         }
1031         return $age_str;
1032 }
1033
1034 use constant {
1035         S_IFINVALID => 0030000,
1036         S_IFGITLINK => 0160000,
1037 };
1038
1039 # submodule/subproject, a commit object reference
1040 sub S_ISGITLINK($) {
1041         my $mode = shift;
1042
1043         return (($mode & S_IFMT) == S_IFGITLINK)
1044 }
1045
1046 # convert file mode in octal to symbolic file mode string
1047 sub mode_str {
1048         my $mode = oct shift;
1049
1050         if (S_ISGITLINK($mode)) {
1051                 return 'm---------';
1052         } elsif (S_ISDIR($mode & S_IFMT)) {
1053                 return 'drwxr-xr-x';
1054         } elsif (S_ISLNK($mode)) {
1055                 return 'lrwxrwxrwx';
1056         } elsif (S_ISREG($mode)) {
1057                 # git cares only about the executable bit
1058                 if ($mode & S_IXUSR) {
1059                         return '-rwxr-xr-x';
1060                 } else {
1061                         return '-rw-r--r--';
1062                 };
1063         } else {
1064                 return '----------';
1065         }
1066 }
1067
1068 # convert file mode in octal to file type string
1069 sub file_type {
1070         my $mode = shift;
1071
1072         if ($mode !~ m/^[0-7]+$/) {
1073                 return $mode;
1074         } else {
1075                 $mode = oct $mode;
1076         }
1077
1078         if (S_ISGITLINK($mode)) {
1079                 return "submodule";
1080         } elsif (S_ISDIR($mode & S_IFMT)) {
1081                 return "directory";
1082         } elsif (S_ISLNK($mode)) {
1083                 return "symlink";
1084         } elsif (S_ISREG($mode)) {
1085                 return "file";
1086         } else {
1087                 return "unknown";
1088         }
1089 }
1090
1091 # convert file mode in octal to file type description string
1092 sub file_type_long {
1093         my $mode = shift;
1094
1095         if ($mode !~ m/^[0-7]+$/) {
1096                 return $mode;
1097         } else {
1098                 $mode = oct $mode;
1099         }
1100
1101         if (S_ISGITLINK($mode)) {
1102                 return "submodule";
1103         } elsif (S_ISDIR($mode & S_IFMT)) {
1104                 return "directory";
1105         } elsif (S_ISLNK($mode)) {
1106                 return "symlink";
1107         } elsif (S_ISREG($mode)) {
1108                 if ($mode & S_IXUSR) {
1109                         return "executable";
1110                 } else {
1111                         return "file";
1112                 };
1113         } else {
1114                 return "unknown";
1115         }
1116 }
1117
1118
1119 ## ----------------------------------------------------------------------
1120 ## functions returning short HTML fragments, or transforming HTML fragments
1121 ## which don't belong to other sections
1122
1123 # format line of commit message.
1124 sub format_log_line_html {
1125         my $line = shift;
1126
1127         $line = esc_html($line, -nbsp=>1);
1128         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1129                 my $hash_text = $1;
1130                 my $link =
1131                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1132                                 -class => "text"}, $hash_text);
1133                 $line =~ s/$hash_text/$link/;
1134         }
1135         return $line;
1136 }
1137
1138 # format marker of refs pointing to given object
1139
1140 # the destination action is chosen based on object type and current context:
1141 # - for annotated tags, we choose the tag view unless it's the current view
1142 #   already, in which case we go to shortlog view
1143 # - for other refs, we keep the current view if we're in history, shortlog or
1144 #   log view, and select shortlog otherwise
1145 sub format_ref_marker {
1146         my ($refs, $id) = @_;
1147         my $markers = '';
1148
1149         if (defined $refs->{$id}) {
1150                 foreach my $ref (@{$refs->{$id}}) {
1151                         # this code exploits the fact that non-lightweight tags are the
1152                         # only indirect objects, and that they are the only objects for which
1153                         # we want to use tag instead of shortlog as action
1154                         my ($type, $name) = qw();
1155                         my $indirect = ($ref =~ s/\^\{\}$//);
1156                         # e.g. tags/v2.6.11 or heads/next
1157                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1158                                 $type = $1;
1159                                 $name = $2;
1160                         } else {
1161                                 $type = "ref";
1162                                 $name = $ref;
1163                         }
1164
1165                         my $class = $type;
1166                         $class .= " indirect" if $indirect;
1167
1168                         my $dest_action = "shortlog";
1169
1170                         if ($indirect) {
1171                                 $dest_action = "tag" unless $action eq "tag";
1172                         } elsif ($action =~ /^(history|(short)?log)$/) {
1173                                 $dest_action = $action;
1174                         }
1175
1176                         my $dest = "";
1177                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1178                         $dest .= $ref;
1179
1180                         my $link = $cgi->a({
1181                                 -href => href(
1182                                         action=>$dest_action,
1183                                         hash=>$dest
1184                                 )}, $name);
1185
1186                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1187                                 $link . "</span>";
1188                 }
1189         }
1190
1191         if ($markers) {
1192                 return ' <span class="refs">'. $markers . '</span>';
1193         } else {
1194                 return "";
1195         }
1196 }
1197
1198 # format, perhaps shortened and with markers, title line
1199 sub format_subject_html {
1200         my ($long, $short, $href, $extra) = @_;
1201         $extra = '' unless defined($extra);
1202
1203         if (length($short) < length($long)) {
1204                 return $cgi->a({-href => $href, -class => "list subject",
1205                                 -title => to_utf8($long)},
1206                        esc_html($short) . $extra);
1207         } else {
1208                 return $cgi->a({-href => $href, -class => "list subject"},
1209                        esc_html($long)  . $extra);
1210         }
1211 }
1212
1213 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1214 sub format_git_diff_header_line {
1215         my $line = shift;
1216         my $diffinfo = shift;
1217         my ($from, $to) = @_;
1218
1219         if ($diffinfo->{'nparents'}) {
1220                 # combined diff
1221                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1222                 if ($to->{'href'}) {
1223                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1224                                          esc_path($to->{'file'}));
1225                 } else { # file was deleted (no href)
1226                         $line .= esc_path($to->{'file'});
1227                 }
1228         } else {
1229                 # "ordinary" diff
1230                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1231                 if ($from->{'href'}) {
1232                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1233                                          'a/' . esc_path($from->{'file'}));
1234                 } else { # file was added (no href)
1235                         $line .= 'a/' . esc_path($from->{'file'});
1236                 }
1237                 $line .= ' ';
1238                 if ($to->{'href'}) {
1239                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1240                                          'b/' . esc_path($to->{'file'}));
1241                 } else { # file was deleted
1242                         $line .= 'b/' . esc_path($to->{'file'});
1243                 }
1244         }
1245
1246         return "<div class=\"diff header\">$line</div>\n";
1247 }
1248
1249 # format extended diff header line, before patch itself
1250 sub format_extended_diff_header_line {
1251         my $line = shift;
1252         my $diffinfo = shift;
1253         my ($from, $to) = @_;
1254
1255         # match <path>
1256         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1257                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1258                                        esc_path($from->{'file'}));
1259         }
1260         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1261                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1262                                  esc_path($to->{'file'}));
1263         }
1264         # match single <mode>
1265         if ($line =~ m/\s(\d{6})$/) {
1266                 $line .= '<span class="info"> (' .
1267                          file_type_long($1) .
1268                          ')</span>';
1269         }
1270         # match <hash>
1271         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1272                 # can match only for combined diff
1273                 $line = 'index ';
1274                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1275                         if ($from->{'href'}[$i]) {
1276                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1277                                                   -class=>"hash"},
1278                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1279                         } else {
1280                                 $line .= '0' x 7;
1281                         }
1282                         # separator
1283                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1284                 }
1285                 $line .= '..';
1286                 if ($to->{'href'}) {
1287                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1288                                          substr($diffinfo->{'to_id'},0,7));
1289                 } else {
1290                         $line .= '0' x 7;
1291                 }
1292
1293         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1294                 # can match only for ordinary diff
1295                 my ($from_link, $to_link);
1296                 if ($from->{'href'}) {
1297                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1298                                              substr($diffinfo->{'from_id'},0,7));
1299                 } else {
1300                         $from_link = '0' x 7;
1301                 }
1302                 if ($to->{'href'}) {
1303                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1304                                            substr($diffinfo->{'to_id'},0,7));
1305                 } else {
1306                         $to_link = '0' x 7;
1307                 }
1308                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1309                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1310         }
1311
1312         return $line . "<br/>\n";
1313 }
1314
1315 # format from-file/to-file diff header
1316 sub format_diff_from_to_header {
1317         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1318         my $line;
1319         my $result = '';
1320
1321         $line = $from_line;
1322         #assert($line =~ m/^---/) if DEBUG;
1323         # no extra formatting for "^--- /dev/null"
1324         if (! $diffinfo->{'nparents'}) {
1325                 # ordinary (single parent) diff
1326                 if ($line =~ m!^--- "?a/!) {
1327                         if ($from->{'href'}) {
1328                                 $line = '--- a/' .
1329                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1330                                                 esc_path($from->{'file'}));
1331                         } else {
1332                                 $line = '--- a/' .
1333                                         esc_path($from->{'file'});
1334                         }
1335                 }
1336                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1337
1338         } else {
1339                 # combined diff (merge commit)
1340                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1341                         if ($from->{'href'}[$i]) {
1342                                 $line = '--- ' .
1343                                         $cgi->a({-href=>href(action=>"blobdiff",
1344                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1345                                                              hash_parent_base=>$parents[$i],
1346                                                              file_parent=>$from->{'file'}[$i],
1347                                                              hash=>$diffinfo->{'to_id'},
1348                                                              hash_base=>$hash,
1349                                                              file_name=>$to->{'file'}),
1350                                                  -class=>"path",
1351                                                  -title=>"diff" . ($i+1)},
1352                                                 $i+1) .
1353                                         '/' .
1354                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1355                                                 esc_path($from->{'file'}[$i]));
1356                         } else {
1357                                 $line = '--- /dev/null';
1358                         }
1359                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1360                 }
1361         }
1362
1363         $line = $to_line;
1364         #assert($line =~ m/^\+\+\+/) if DEBUG;
1365         # no extra formatting for "^+++ /dev/null"
1366         if ($line =~ m!^\+\+\+ "?b/!) {
1367                 if ($to->{'href'}) {
1368                         $line = '+++ b/' .
1369                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1370                                         esc_path($to->{'file'}));
1371                 } else {
1372                         $line = '+++ b/' .
1373                                 esc_path($to->{'file'});
1374                 }
1375         }
1376         $result .= qq!<div class="diff to_file">$line</div>\n!;
1377
1378         return $result;
1379 }
1380
1381 # create note for patch simplified by combined diff
1382 sub format_diff_cc_simplified {
1383         my ($diffinfo, @parents) = @_;
1384         my $result = '';
1385
1386         $result .= "<div class=\"diff header\">" .
1387                    "diff --cc ";
1388         if (!is_deleted($diffinfo)) {
1389                 $result .= $cgi->a({-href => href(action=>"blob",
1390                                                   hash_base=>$hash,
1391                                                   hash=>$diffinfo->{'to_id'},
1392                                                   file_name=>$diffinfo->{'to_file'}),
1393                                     -class => "path"},
1394                                    esc_path($diffinfo->{'to_file'}));
1395         } else {
1396                 $result .= esc_path($diffinfo->{'to_file'});
1397         }
1398         $result .= "</div>\n" . # class="diff header"
1399                    "<div class=\"diff nodifferences\">" .
1400                    "Simple merge" .
1401                    "</div>\n"; # class="diff nodifferences"
1402
1403         return $result;
1404 }
1405
1406 # format patch (diff) line (not to be used for diff headers)
1407 sub format_diff_line {
1408         my $line = shift;
1409         my ($from, $to) = @_;
1410         my $diff_class = "";
1411
1412         chomp $line;
1413
1414         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1415                 # combined diff
1416                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1417                 if ($line =~ m/^\@{3}/) {
1418                         $diff_class = " chunk_header";
1419                 } elsif ($line =~ m/^\\/) {
1420                         $diff_class = " incomplete";
1421                 } elsif ($prefix =~ tr/+/+/) {
1422                         $diff_class = " add";
1423                 } elsif ($prefix =~ tr/-/-/) {
1424                         $diff_class = " rem";
1425                 }
1426         } else {
1427                 # assume ordinary diff
1428                 my $char = substr($line, 0, 1);
1429                 if ($char eq '+') {
1430                         $diff_class = " add";
1431                 } elsif ($char eq '-') {
1432                         $diff_class = " rem";
1433                 } elsif ($char eq '@') {
1434                         $diff_class = " chunk_header";
1435                 } elsif ($char eq "\\") {
1436                         $diff_class = " incomplete";
1437                 }
1438         }
1439         $line = untabify($line);
1440         if ($from && $to && $line =~ m/^\@{2} /) {
1441                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1442                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1443
1444                 $from_lines = 0 unless defined $from_lines;
1445                 $to_lines   = 0 unless defined $to_lines;
1446
1447                 if ($from->{'href'}) {
1448                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1449                                              -class=>"list"}, $from_text);
1450                 }
1451                 if ($to->{'href'}) {
1452                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1453                                              -class=>"list"}, $to_text);
1454                 }
1455                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1456                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1457                 return "<div class=\"diff$diff_class\">$line</div>\n";
1458         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1459                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1460                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1461
1462                 @from_text = split(' ', $ranges);
1463                 for (my $i = 0; $i < @from_text; ++$i) {
1464                         ($from_start[$i], $from_nlines[$i]) =
1465                                 (split(',', substr($from_text[$i], 1)), 0);
1466                 }
1467
1468                 $to_text   = pop @from_text;
1469                 $to_start  = pop @from_start;
1470                 $to_nlines = pop @from_nlines;
1471
1472                 $line = "<span class=\"chunk_info\">$prefix ";
1473                 for (my $i = 0; $i < @from_text; ++$i) {
1474                         if ($from->{'href'}[$i]) {
1475                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1476                                                   -class=>"list"}, $from_text[$i]);
1477                         } else {
1478                                 $line .= $from_text[$i];
1479                         }
1480                         $line .= " ";
1481                 }
1482                 if ($to->{'href'}) {
1483                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1484                                           -class=>"list"}, $to_text);
1485                 } else {
1486                         $line .= $to_text;
1487                 }
1488                 $line .= " $prefix</span>" .
1489                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1490                 return "<div class=\"diff$diff_class\">$line</div>\n";
1491         }
1492         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1493 }
1494
1495 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1496 # linked.  Pass the hash of the tree/commit to snapshot.
1497 sub format_snapshot_links {
1498         my ($hash) = @_;
1499         my @snapshot_fmts = gitweb_check_feature('snapshot');
1500         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1501         my $num_fmts = @snapshot_fmts;
1502         if ($num_fmts > 1) {
1503                 # A parenthesized list of links bearing format names.
1504                 # e.g. "snapshot (_tar.gz_ _zip_)"
1505                 return "snapshot (" . join(' ', map
1506                         $cgi->a({
1507                                 -href => href(
1508                                         action=>"snapshot",
1509                                         hash=>$hash,
1510                                         snapshot_format=>$_
1511                                 )
1512                         }, $known_snapshot_formats{$_}{'display'})
1513                 , @snapshot_fmts) . ")";
1514         } elsif ($num_fmts == 1) {
1515                 # A single "snapshot" link whose tooltip bears the format name.
1516                 # i.e. "_snapshot_"
1517                 my ($fmt) = @snapshot_fmts;
1518                 return
1519                         $cgi->a({
1520                                 -href => href(
1521                                         action=>"snapshot",
1522                                         hash=>$hash,
1523                                         snapshot_format=>$fmt
1524                                 ),
1525                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1526                         }, "snapshot");
1527         } else { # $num_fmts == 0
1528                 return undef;
1529         }
1530 }
1531
1532 ## ......................................................................
1533 ## functions returning values to be passed, perhaps after some
1534 ## transformation, to other functions; e.g. returning arguments to href()
1535
1536 # returns hash to be passed to href to generate gitweb URL
1537 # in -title key it returns description of link
1538 sub get_feed_info {
1539         my $format = shift || 'Atom';
1540         my %res = (action => lc($format));
1541
1542         # feed links are possible only for project views
1543         return unless (defined $project);
1544         # some views should link to OPML, or to generic project feed,
1545         # or don't have specific feed yet (so they should use generic)
1546         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1547
1548         my $branch;
1549         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1550         # from tag links; this also makes possible to detect branch links
1551         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1552             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1553                 $branch = $1;
1554         }
1555         # find log type for feed description (title)
1556         my $type = 'log';
1557         if (defined $file_name) {
1558                 $type  = "history of $file_name";
1559                 $type .= "/" if ($action eq 'tree');
1560                 $type .= " on '$branch'" if (defined $branch);
1561         } else {
1562                 $type = "log of $branch" if (defined $branch);
1563         }
1564
1565         $res{-title} = $type;
1566         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1567         $res{'file_name'} = $file_name;
1568
1569         return %res;
1570 }
1571
1572 ## ----------------------------------------------------------------------
1573 ## git utility subroutines, invoking git commands
1574
1575 # returns path to the core git executable and the --git-dir parameter as list
1576 sub git_cmd {
1577         return $GIT, '--git-dir='.$git_dir;
1578 }
1579
1580 # quote the given arguments for passing them to the shell
1581 # quote_command("command", "arg 1", "arg with ' and ! characters")
1582 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1583 # Try to avoid using this function wherever possible.
1584 sub quote_command {
1585         return join(' ',
1586                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1587 }
1588
1589 # get HEAD ref of given project as hash
1590 sub git_get_head_hash {
1591         my $project = shift;
1592         my $o_git_dir = $git_dir;
1593         my $retval = undef;
1594         $git_dir = "$projectroot/$project";
1595         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1596                 my $head = <$fd>;
1597                 close $fd;
1598                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1599                         $retval = $1;
1600                 }
1601         }
1602         if (defined $o_git_dir) {
1603                 $git_dir = $o_git_dir;
1604         }
1605         return $retval;
1606 }
1607
1608 # get type of given object
1609 sub git_get_type {
1610         my $hash = shift;
1611
1612         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1613         my $type = <$fd>;
1614         close $fd or return;
1615         chomp $type;
1616         return $type;
1617 }
1618
1619 # repository configuration
1620 our $config_file = '';
1621 our %config;
1622
1623 # store multiple values for single key as anonymous array reference
1624 # single values stored directly in the hash, not as [ <value> ]
1625 sub hash_set_multi {
1626         my ($hash, $key, $value) = @_;
1627
1628         if (!exists $hash->{$key}) {
1629                 $hash->{$key} = $value;
1630         } elsif (!ref $hash->{$key}) {
1631                 $hash->{$key} = [ $hash->{$key}, $value ];
1632         } else {
1633                 push @{$hash->{$key}}, $value;
1634         }
1635 }
1636
1637 # return hash of git project configuration
1638 # optionally limited to some section, e.g. 'gitweb'
1639 sub git_parse_project_config {
1640         my $section_regexp = shift;
1641         my %config;
1642
1643         local $/ = "\0";
1644
1645         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1646                 or return;
1647
1648         while (my $keyval = <$fh>) {
1649                 chomp $keyval;
1650                 my ($key, $value) = split(/\n/, $keyval, 2);
1651
1652                 hash_set_multi(\%config, $key, $value)
1653                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1654         }
1655         close $fh;
1656
1657         return %config;
1658 }
1659
1660 # convert config value to boolean, 'true' or 'false'
1661 # no value, number > 0, 'true' and 'yes' values are true
1662 # rest of values are treated as false (never as error)
1663 sub config_to_bool {
1664         my $val = shift;
1665
1666         # strip leading and trailing whitespace
1667         $val =~ s/^\s+//;
1668         $val =~ s/\s+$//;
1669
1670         return (!defined $val ||               # section.key
1671                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1672                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1673 }
1674
1675 # convert config value to simple decimal number
1676 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1677 # to be multiplied by 1024, 1048576, or 1073741824
1678 sub config_to_int {
1679         my $val = shift;
1680
1681         # strip leading and trailing whitespace
1682         $val =~ s/^\s+//;
1683         $val =~ s/\s+$//;
1684
1685         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1686                 $unit = lc($unit);
1687                 # unknown unit is treated as 1
1688                 return $num * ($unit eq 'g' ? 1073741824 :
1689                                $unit eq 'm' ?    1048576 :
1690                                $unit eq 'k' ?       1024 : 1);
1691         }
1692         return $val;
1693 }
1694
1695 # convert config value to array reference, if needed
1696 sub config_to_multi {
1697         my $val = shift;
1698
1699         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1700 }
1701
1702 sub git_get_project_config {
1703         my ($key, $type) = @_;
1704
1705         # key sanity check
1706         return unless ($key);
1707         $key =~ s/^gitweb\.//;
1708         return if ($key =~ m/\W/);
1709
1710         # type sanity check
1711         if (defined $type) {
1712                 $type =~ s/^--//;
1713                 $type = undef
1714                         unless ($type eq 'bool' || $type eq 'int');
1715         }
1716
1717         # get config
1718         if (!defined $config_file ||
1719             $config_file ne "$git_dir/config") {
1720                 %config = git_parse_project_config('gitweb');
1721                 $config_file = "$git_dir/config";
1722         }
1723
1724         # ensure given type
1725         if (!defined $type) {
1726                 return $config{"gitweb.$key"};
1727         } elsif ($type eq 'bool') {
1728                 # backward compatibility: 'git config --bool' returns true/false
1729                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1730         } elsif ($type eq 'int') {
1731                 return config_to_int($config{"gitweb.$key"});
1732         }
1733         return $config{"gitweb.$key"};
1734 }
1735
1736 # get hash of given path at given ref
1737 sub git_get_hash_by_path {
1738         my $base = shift;
1739         my $path = shift || return undef;
1740         my $type = shift;
1741
1742         $path =~ s,/+$,,;
1743
1744         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1745                 or die_error(500, "Open git-ls-tree failed");
1746         my $line = <$fd>;
1747         close $fd or return undef;
1748
1749         if (!defined $line) {
1750                 # there is no tree or hash given by $path at $base
1751                 return undef;
1752         }
1753
1754         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1755         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1756         if (defined $type && $type ne $2) {
1757                 # type doesn't match
1758                 return undef;
1759         }
1760         return $3;
1761 }
1762
1763 # get path of entry with given hash at given tree-ish (ref)
1764 # used to get 'from' filename for combined diff (merge commit) for renames
1765 sub git_get_path_by_hash {
1766         my $base = shift || return;
1767         my $hash = shift || return;
1768
1769         local $/ = "\0";
1770
1771         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1772                 or return undef;
1773         while (my $line = <$fd>) {
1774                 chomp $line;
1775
1776                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1777                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1778                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1779                         close $fd;
1780                         return $1;
1781                 }
1782         }
1783         close $fd;
1784         return undef;
1785 }
1786
1787 ## ......................................................................
1788 ## git utility functions, directly accessing git repository
1789
1790 sub git_get_project_description {
1791         my $path = shift;
1792
1793         $git_dir = "$projectroot/$path";
1794         open my $fd, "$git_dir/description"
1795                 or return git_get_project_config('description');
1796         my $descr = <$fd>;
1797         close $fd;
1798         if (defined $descr) {
1799                 chomp $descr;
1800         }
1801         return $descr;
1802 }
1803
1804 sub git_get_project_ctags {
1805         my $path = shift;
1806         my $ctags = {};
1807
1808         $git_dir = "$projectroot/$path";
1809         foreach (<$git_dir/ctags/*>) {
1810                 open CT, $_ or next;
1811                 my $val = <CT>;
1812                 chomp $val;
1813                 close CT;
1814                 my $ctag = $_; $ctag =~ s#.*/##;
1815                 $ctags->{$ctag} = $val;
1816         }
1817         $ctags;
1818 }
1819
1820 sub git_populate_project_tagcloud {
1821         my $ctags = shift;
1822
1823         # First, merge different-cased tags; tags vote on casing
1824         my %ctags_lc;
1825         foreach (keys %$ctags) {
1826                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1827                 if (not $ctags_lc{lc $_}->{topcount}
1828                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1829                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1830                         $ctags_lc{lc $_}->{topname} = $_;
1831                 }
1832         }
1833
1834         my $cloud;
1835         if (eval { require HTML::TagCloud; 1; }) {
1836                 $cloud = HTML::TagCloud->new;
1837                 foreach (sort keys %ctags_lc) {
1838                         # Pad the title with spaces so that the cloud looks
1839                         # less crammed.
1840                         my $title = $ctags_lc{$_}->{topname};
1841                         $title =~ s/ /&nbsp;/g;
1842                         $title =~ s/^/&nbsp;/g;
1843                         $title =~ s/$/&nbsp;/g;
1844                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1845                 }
1846         } else {
1847                 $cloud = \%ctags_lc;
1848         }
1849         $cloud;
1850 }
1851
1852 sub git_show_project_tagcloud {
1853         my ($cloud, $count) = @_;
1854         print STDERR ref($cloud)."..\n";
1855         if (ref $cloud eq 'HTML::TagCloud') {
1856                 return $cloud->html_and_css($count);
1857         } else {
1858                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
1859                 return '<p align="center">' . join (', ', map {
1860                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
1861                 } splice(@tags, 0, $count)) . '</p>';
1862         }
1863 }
1864
1865 sub git_get_project_url_list {
1866         my $path = shift;
1867
1868         $git_dir = "$projectroot/$path";
1869         open my $fd, "$git_dir/cloneurl"
1870                 or return wantarray ?
1871                 @{ config_to_multi(git_get_project_config('url')) } :
1872                    config_to_multi(git_get_project_config('url'));
1873         my @git_project_url_list = map { chomp; $_ } <$fd>;
1874         close $fd;
1875
1876         return wantarray ? @git_project_url_list : \@git_project_url_list;
1877 }
1878
1879 sub git_get_projects_list {
1880         my ($filter) = @_;
1881         my @list;
1882
1883         $filter ||= '';
1884         $filter =~ s/\.git$//;
1885
1886         my ($check_forks) = gitweb_check_feature('forks');
1887
1888         if (-d $projects_list) {
1889                 # search in directory
1890                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1891                 # remove the trailing "/"
1892                 $dir =~ s!/+$!!;
1893                 my $pfxlen = length("$dir");
1894                 my $pfxdepth = ($dir =~ tr!/!!);
1895
1896                 File::Find::find({
1897                         follow_fast => 1, # follow symbolic links
1898                         follow_skip => 2, # ignore duplicates
1899                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1900                         wanted => sub {
1901                                 # skip project-list toplevel, if we get it.
1902                                 return if (m!^[/.]$!);
1903                                 # only directories can be git repositories
1904                                 return unless (-d $_);
1905                                 # don't traverse too deep (Find is super slow on os x)
1906                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1907                                         $File::Find::prune = 1;
1908                                         return;
1909                                 }
1910
1911                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1912                                 # we check related file in $projectroot
1913                                 if ($check_forks and $subdir =~ m#/.#) {
1914                                         $File::Find::prune = 1;
1915                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1916                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1917                                         $File::Find::prune = 1;
1918                                 }
1919                         },
1920                 }, "$dir");
1921
1922         } elsif (-f $projects_list) {
1923                 # read from file(url-encoded):
1924                 # 'git%2Fgit.git Linus+Torvalds'
1925                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1926                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1927                 my %paths;
1928                 open my ($fd), $projects_list or return;
1929         PROJECT:
1930                 while (my $line = <$fd>) {
1931                         chomp $line;
1932                         my ($path, $owner) = split ' ', $line;
1933                         $path = unescape($path);
1934                         $owner = unescape($owner);
1935                         if (!defined $path) {
1936                                 next;
1937                         }
1938                         if ($filter ne '') {
1939                                 # looking for forks;
1940                                 my $pfx = substr($path, 0, length($filter));
1941                                 if ($pfx ne $filter) {
1942                                         next PROJECT;
1943                                 }
1944                                 my $sfx = substr($path, length($filter));
1945                                 if ($sfx !~ /^\/.*\.git$/) {
1946                                         next PROJECT;
1947                                 }
1948                         } elsif ($check_forks) {
1949                         PATH:
1950                                 foreach my $filter (keys %paths) {
1951                                         # looking for forks;
1952                                         my $pfx = substr($path, 0, length($filter));
1953                                         if ($pfx ne $filter) {
1954                                                 next PATH;
1955                                         }
1956                                         my $sfx = substr($path, length($filter));
1957                                         if ($sfx !~ /^\/.*\.git$/) {
1958                                                 next PATH;
1959                                         }
1960                                         # is a fork, don't include it in
1961                                         # the list
1962                                         next PROJECT;
1963                                 }
1964                         }
1965                         if (check_export_ok("$projectroot/$path")) {
1966                                 my $pr = {
1967                                         path => $path,
1968                                         owner => to_utf8($owner),
1969                                 };
1970                                 push @list, $pr;
1971                                 (my $forks_path = $path) =~ s/\.git$//;
1972                                 $paths{$forks_path}++;
1973                         }
1974                 }
1975                 close $fd;
1976         }
1977         return @list;
1978 }
1979
1980 our $gitweb_project_owner = undef;
1981 sub git_get_project_list_from_file {
1982
1983         return if (defined $gitweb_project_owner);
1984
1985         $gitweb_project_owner = {};
1986         # read from file (url-encoded):
1987         # 'git%2Fgit.git Linus+Torvalds'
1988         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1989         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1990         if (-f $projects_list) {
1991                 open (my $fd , $projects_list);
1992                 while (my $line = <$fd>) {
1993                         chomp $line;
1994                         my ($pr, $ow) = split ' ', $line;
1995                         $pr = unescape($pr);
1996                         $ow = unescape($ow);
1997                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1998                 }
1999                 close $fd;
2000         }
2001 }
2002
2003 sub git_get_project_owner {
2004         my $project = shift;
2005         my $owner;
2006
2007         return undef unless $project;
2008         $git_dir = "$projectroot/$project";
2009
2010         if (!defined $gitweb_project_owner) {
2011                 git_get_project_list_from_file();
2012         }
2013
2014         if (exists $gitweb_project_owner->{$project}) {
2015                 $owner = $gitweb_project_owner->{$project};
2016         }
2017         if (!defined $owner){
2018                 $owner = git_get_project_config('owner');
2019         }
2020         if (!defined $owner) {
2021                 $owner = get_file_owner("$git_dir");
2022         }
2023
2024         return $owner;
2025 }
2026
2027 sub git_get_last_activity {
2028         my ($path) = @_;
2029         my $fd;
2030
2031         $git_dir = "$projectroot/$path";
2032         open($fd, "-|", git_cmd(), 'for-each-ref',
2033              '--format=%(committer)',
2034              '--sort=-committerdate',
2035              '--count=1',
2036              'refs/heads') or return;
2037         my $most_recent = <$fd>;
2038         close $fd or return;
2039         if (defined $most_recent &&
2040             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2041                 my $timestamp = $1;
2042                 my $age = time - $timestamp;
2043                 return ($age, age_string($age));
2044         }
2045         return (undef, undef);
2046 }
2047
2048 sub git_get_references {
2049         my $type = shift || "";
2050         my %refs;
2051         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2052         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2053         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2054                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2055                 or return;
2056
2057         while (my $line = <$fd>) {
2058                 chomp $line;
2059                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2060                         if (defined $refs{$1}) {
2061                                 push @{$refs{$1}}, $2;
2062                         } else {
2063                                 $refs{$1} = [ $2 ];
2064                         }
2065                 }
2066         }
2067         close $fd or return;
2068         return \%refs;
2069 }
2070
2071 sub git_get_rev_name_tags {
2072         my $hash = shift || return undef;
2073
2074         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2075                 or return;
2076         my $name_rev = <$fd>;
2077         close $fd;
2078
2079         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2080                 return $1;
2081         } else {
2082                 # catches also '$hash undefined' output
2083                 return undef;
2084         }
2085 }
2086
2087 ## ----------------------------------------------------------------------
2088 ## parse to hash functions
2089
2090 sub parse_date {
2091         my $epoch = shift;
2092         my $tz = shift || "-0000";
2093
2094         my %date;
2095         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2096         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2097         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2098         $date{'hour'} = $hour;
2099         $date{'minute'} = $min;
2100         $date{'mday'} = $mday;
2101         $date{'day'} = $days[$wday];
2102         $date{'month'} = $months[$mon];
2103         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2104                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2105         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2106                              $mday, $months[$mon], $hour ,$min;
2107         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2108                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2109
2110         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2111         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2112         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2113         $date{'hour_local'} = $hour;
2114         $date{'minute_local'} = $min;
2115         $date{'tz_local'} = $tz;
2116         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2117                                   1900+$year, $mon+1, $mday,
2118                                   $hour, $min, $sec, $tz);
2119         return %date;
2120 }
2121
2122 sub parse_tag {
2123         my $tag_id = shift;
2124         my %tag;
2125         my @comment;
2126
2127         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2128         $tag{'id'} = $tag_id;
2129         while (my $line = <$fd>) {
2130                 chomp $line;
2131                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2132                         $tag{'object'} = $1;
2133                 } elsif ($line =~ m/^type (.+)$/) {
2134                         $tag{'type'} = $1;
2135                 } elsif ($line =~ m/^tag (.+)$/) {
2136                         $tag{'name'} = $1;
2137                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2138                         $tag{'author'} = $1;
2139                         $tag{'epoch'} = $2;
2140                         $tag{'tz'} = $3;
2141                 } elsif ($line =~ m/--BEGIN/) {
2142                         push @comment, $line;
2143                         last;
2144                 } elsif ($line eq "") {
2145                         last;
2146                 }
2147         }
2148         push @comment, <$fd>;
2149         $tag{'comment'} = \@comment;
2150         close $fd or return;
2151         if (!defined $tag{'name'}) {
2152                 return
2153         };
2154         return %tag
2155 }
2156
2157 sub parse_commit_text {
2158         my ($commit_text, $withparents) = @_;
2159         my @commit_lines = split '\n', $commit_text;
2160         my %co;
2161
2162         pop @commit_lines; # Remove '\0'
2163
2164         if (! @commit_lines) {
2165                 return;
2166         }
2167
2168         my $header = shift @commit_lines;
2169         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2170                 return;
2171         }
2172         ($co{'id'}, my @parents) = split ' ', $header;
2173         while (my $line = shift @commit_lines) {
2174                 last if $line eq "\n";
2175                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2176                         $co{'tree'} = $1;
2177                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2178                         push @parents, $1;
2179                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2180                         $co{'author'} = $1;
2181                         $co{'author_epoch'} = $2;
2182                         $co{'author_tz'} = $3;
2183                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2184                                 $co{'author_name'}  = $1;
2185                                 $co{'author_email'} = $2;
2186                         } else {
2187                                 $co{'author_name'} = $co{'author'};
2188                         }
2189                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2190                         $co{'committer'} = $1;
2191                         $co{'committer_epoch'} = $2;
2192                         $co{'committer_tz'} = $3;
2193                         $co{'committer_name'} = $co{'committer'};
2194                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2195                                 $co{'committer_name'}  = $1;
2196                                 $co{'committer_email'} = $2;
2197                         } else {
2198                                 $co{'committer_name'} = $co{'committer'};
2199                         }
2200                 }
2201         }
2202         if (!defined $co{'tree'}) {
2203                 return;
2204         };
2205         $co{'parents'} = \@parents;
2206         $co{'parent'} = $parents[0];
2207
2208         foreach my $title (@commit_lines) {
2209                 $title =~ s/^    //;
2210                 if ($title ne "") {
2211                         $co{'title'} = chop_str($title, 80, 5);
2212                         # remove leading stuff of merges to make the interesting part visible
2213                         if (length($title) > 50) {
2214                                 $title =~ s/^Automatic //;
2215                                 $title =~ s/^merge (of|with) /Merge ... /i;
2216                                 if (length($title) > 50) {
2217                                         $title =~ s/(http|rsync):\/\///;
2218                                 }
2219                                 if (length($title) > 50) {
2220                                         $title =~ s/(master|www|rsync)\.//;
2221                                 }
2222                                 if (length($title) > 50) {
2223                                         $title =~ s/kernel.org:?//;
2224                                 }
2225                                 if (length($title) > 50) {
2226                                         $title =~ s/\/pub\/scm//;
2227                                 }
2228                         }
2229                         $co{'title_short'} = chop_str($title, 50, 5);
2230                         last;
2231                 }
2232         }
2233         if (! defined $co{'title'} || $co{'title'} eq "") {
2234                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2235         }
2236         # remove added spaces
2237         foreach my $line (@commit_lines) {
2238                 $line =~ s/^    //;
2239         }
2240         $co{'comment'} = \@commit_lines;
2241
2242         my $age = time - $co{'committer_epoch'};
2243         $co{'age'} = $age;
2244         $co{'age_string'} = age_string($age);
2245         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2246         if ($age > 60*60*24*7*2) {
2247                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2248                 $co{'age_string_age'} = $co{'age_string'};
2249         } else {
2250                 $co{'age_string_date'} = $co{'age_string'};
2251                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2252         }
2253         return %co;
2254 }
2255
2256 sub parse_commit {
2257         my ($commit_id) = @_;
2258         my %co;
2259
2260         local $/ = "\0";
2261
2262         open my $fd, "-|", git_cmd(), "rev-list",
2263                 "--parents",
2264                 "--header",
2265                 "--max-count=1",
2266                 $commit_id,
2267                 "--",
2268                 or die_error(500, "Open git-rev-list failed");
2269         %co = parse_commit_text(<$fd>, 1);
2270         close $fd;
2271
2272         return %co;
2273 }
2274
2275 sub parse_commits {
2276         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2277         my @cos;
2278
2279         $maxcount ||= 1;
2280         $skip ||= 0;
2281
2282         local $/ = "\0";
2283
2284         open my $fd, "-|", git_cmd(), "rev-list",
2285                 "--header",
2286                 @args,
2287                 ("--max-count=" . $maxcount),
2288                 ("--skip=" . $skip),
2289                 @extra_options,
2290                 $commit_id,
2291                 "--",
2292                 ($filename ? ($filename) : ())
2293                 or die_error(500, "Open git-rev-list failed");
2294         while (my $line = <$fd>) {
2295                 my %co = parse_commit_text($line);
2296                 push @cos, \%co;
2297         }
2298         close $fd;
2299
2300         return wantarray ? @cos : \@cos;
2301 }
2302
2303 # parse line of git-diff-tree "raw" output
2304 sub parse_difftree_raw_line {
2305         my $line = shift;
2306         my %res;
2307
2308         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2309         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2310         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2311                 $res{'from_mode'} = $1;
2312                 $res{'to_mode'} = $2;
2313                 $res{'from_id'} = $3;
2314                 $res{'to_id'} = $4;
2315                 $res{'status'} = $5;
2316                 $res{'similarity'} = $6;
2317                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2318                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2319                 } else {
2320                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2321                 }
2322         }
2323         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2324         # combined diff (for merge commit)
2325         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2326                 $res{'nparents'}  = length($1);
2327                 $res{'from_mode'} = [ split(' ', $2) ];
2328                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2329                 $res{'from_id'} = [ split(' ', $3) ];
2330                 $res{'to_id'} = pop @{$res{'from_id'}};
2331                 $res{'status'} = [ split('', $4) ];
2332                 $res{'to_file'} = unquote($5);
2333         }
2334         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2335         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2336                 $res{'commit'} = $1;
2337         }
2338
2339         return wantarray ? %res : \%res;
2340 }
2341
2342 # wrapper: return parsed line of git-diff-tree "raw" output
2343 # (the argument might be raw line, or parsed info)
2344 sub parsed_difftree_line {
2345         my $line_or_ref = shift;
2346
2347         if (ref($line_or_ref) eq "HASH") {
2348                 # pre-parsed (or generated by hand)
2349                 return $line_or_ref;
2350         } else {
2351                 return parse_difftree_raw_line($line_or_ref);
2352         }
2353 }
2354
2355 # parse line of git-ls-tree output
2356 sub parse_ls_tree_line ($;%) {
2357         my $line = shift;
2358         my %opts = @_;
2359         my %res;
2360
2361         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2362         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2363
2364         $res{'mode'} = $1;
2365         $res{'type'} = $2;
2366         $res{'hash'} = $3;
2367         if ($opts{'-z'}) {
2368                 $res{'name'} = $4;
2369         } else {
2370                 $res{'name'} = unquote($4);
2371         }
2372
2373         return wantarray ? %res : \%res;
2374 }
2375
2376 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2377 sub parse_from_to_diffinfo {
2378         my ($diffinfo, $from, $to, @parents) = @_;
2379
2380         if ($diffinfo->{'nparents'}) {
2381                 # combined diff
2382                 $from->{'file'} = [];
2383                 $from->{'href'} = [];
2384                 fill_from_file_info($diffinfo, @parents)
2385                         unless exists $diffinfo->{'from_file'};
2386                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2387                         $from->{'file'}[$i] =
2388                                 defined $diffinfo->{'from_file'}[$i] ?
2389                                         $diffinfo->{'from_file'}[$i] :
2390                                         $diffinfo->{'to_file'};
2391                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2392                                 $from->{'href'}[$i] = href(action=>"blob",
2393                                                            hash_base=>$parents[$i],
2394                                                            hash=>$diffinfo->{'from_id'}[$i],
2395                                                            file_name=>$from->{'file'}[$i]);
2396                         } else {
2397                                 $from->{'href'}[$i] = undef;
2398                         }
2399                 }
2400         } else {
2401                 # ordinary (not combined) diff
2402                 $from->{'file'} = $diffinfo->{'from_file'};
2403                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2404                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2405                                                hash=>$diffinfo->{'from_id'},
2406                                                file_name=>$from->{'file'});
2407                 } else {
2408                         delete $from->{'href'};
2409                 }
2410         }
2411
2412         $to->{'file'} = $diffinfo->{'to_file'};
2413         if (!is_deleted($diffinfo)) { # file exists in result
2414                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2415                                      hash=>$diffinfo->{'to_id'},
2416                                      file_name=>$to->{'file'});
2417         } else {
2418                 delete $to->{'href'};
2419         }
2420 }
2421
2422 ## ......................................................................
2423 ## parse to array of hashes functions
2424
2425 sub git_get_heads_list {
2426         my $limit = shift;
2427         my @headslist;
2428
2429         open my $fd, '-|', git_cmd(), 'for-each-ref',
2430                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2431                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2432                 'refs/heads'
2433                 or return;
2434         while (my $line = <$fd>) {
2435                 my %ref_item;
2436
2437                 chomp $line;
2438                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2439                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2440                 my ($committer, $epoch, $tz) =
2441                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2442                 $ref_item{'fullname'}  = $name;
2443                 $name =~ s!^refs/heads/!!;
2444
2445                 $ref_item{'name'}  = $name;
2446                 $ref_item{'id'}    = $hash;
2447                 $ref_item{'title'} = $title || '(no commit message)';
2448                 $ref_item{'epoch'} = $epoch;
2449                 if ($epoch) {
2450                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2451                 } else {
2452                         $ref_item{'age'} = "unknown";
2453                 }
2454
2455                 push @headslist, \%ref_item;
2456         }
2457         close $fd;
2458
2459         return wantarray ? @headslist : \@headslist;
2460 }
2461
2462 sub git_get_tags_list {
2463         my $limit = shift;
2464         my @tagslist;
2465
2466         open my $fd, '-|', git_cmd(), 'for-each-ref',
2467                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2468                 '--format=%(objectname) %(objecttype) %(refname) '.
2469                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2470                 'refs/tags'
2471                 or return;
2472         while (my $line = <$fd>) {
2473                 my %ref_item;
2474
2475                 chomp $line;
2476                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2477                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2478                 my ($creator, $epoch, $tz) =
2479                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2480                 $ref_item{'fullname'} = $name;
2481                 $name =~ s!^refs/tags/!!;
2482
2483                 $ref_item{'type'} = $type;
2484                 $ref_item{'id'} = $id;
2485                 $ref_item{'name'} = $name;
2486                 if ($type eq "tag") {
2487                         $ref_item{'subject'} = $title;
2488                         $ref_item{'reftype'} = $reftype;
2489                         $ref_item{'refid'}   = $refid;
2490                 } else {
2491                         $ref_item{'reftype'} = $type;
2492                         $ref_item{'refid'}   = $id;
2493                 }
2494
2495                 if ($type eq "tag" || $type eq "commit") {
2496                         $ref_item{'epoch'} = $epoch;
2497                         if ($epoch) {
2498                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2499                         } else {
2500                                 $ref_item{'age'} = "unknown";
2501                         }
2502                 }
2503
2504                 push @tagslist, \%ref_item;
2505         }
2506         close $fd;
2507
2508         return wantarray ? @tagslist : \@tagslist;
2509 }
2510
2511 ## ----------------------------------------------------------------------
2512 ## filesystem-related functions
2513
2514 sub get_file_owner {
2515         my $path = shift;
2516
2517         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2518         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2519         if (!defined $gcos) {
2520                 return undef;
2521         }
2522         my $owner = $gcos;
2523         $owner =~ s/[,;].*$//;
2524         return to_utf8($owner);
2525 }
2526
2527 ## ......................................................................
2528 ## mimetype related functions
2529
2530 sub mimetype_guess_file {
2531         my $filename = shift;
2532         my $mimemap = shift;
2533         -r $mimemap or return undef;
2534
2535         my %mimemap;
2536         open(MIME, $mimemap) or return undef;
2537         while (<MIME>) {
2538                 next if m/^#/; # skip comments
2539                 my ($mime, $exts) = split(/\t+/);
2540                 if (defined $exts) {
2541                         my @exts = split(/\s+/, $exts);
2542                         foreach my $ext (@exts) {
2543                                 $mimemap{$ext} = $mime;
2544                         }
2545                 }
2546         }
2547         close(MIME);
2548
2549         $filename =~ /\.([^.]*)$/;
2550         return $mimemap{$1};
2551 }
2552
2553 sub mimetype_guess {
2554         my $filename = shift;
2555         my $mime;
2556         $filename =~ /\./ or return undef;
2557
2558         if ($mimetypes_file) {
2559                 my $file = $mimetypes_file;
2560                 if ($file !~ m!^/!) { # if it is relative path
2561                         # it is relative to project
2562                         $file = "$projectroot/$project/$file";
2563                 }
2564                 $mime = mimetype_guess_file($filename, $file);
2565         }
2566         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2567         return $mime;
2568 }
2569
2570 sub blob_mimetype {
2571         my $fd = shift;
2572         my $filename = shift;
2573
2574         if ($filename) {
2575                 my $mime = mimetype_guess($filename);
2576                 $mime and return $mime;
2577         }
2578
2579         # just in case
2580         return $default_blob_plain_mimetype unless $fd;
2581
2582         if (-T $fd) {
2583                 return 'text/plain';
2584         } elsif (! $filename) {
2585                 return 'application/octet-stream';
2586         } elsif ($filename =~ m/\.png$/i) {
2587                 return 'image/png';
2588         } elsif ($filename =~ m/\.gif$/i) {
2589                 return 'image/gif';
2590         } elsif ($filename =~ m/\.jpe?g$/i) {
2591                 return 'image/jpeg';
2592         } else {
2593                 return 'application/octet-stream';
2594         }
2595 }
2596
2597 sub blob_contenttype {
2598         my ($fd, $file_name, $type) = @_;
2599
2600         $type ||= blob_mimetype($fd, $file_name);
2601         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2602                 $type .= "; charset=$default_text_plain_charset";
2603         }
2604
2605         return $type;
2606 }
2607
2608 ## ======================================================================
2609 ## functions printing HTML: header, footer, error page
2610
2611 sub git_header_html {
2612         my $status = shift || "200 OK";
2613         my $expires = shift;
2614
2615         my $title = "$site_name";
2616         if (defined $project) {
2617                 $title .= " - " . to_utf8($project);
2618                 if (defined $action) {
2619                         $title .= "/$action";
2620                         if (defined $file_name) {
2621                                 $title .= " - " . esc_path($file_name);
2622                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2623                                         $title .= "/";
2624                                 }
2625                         }
2626                 }
2627         }
2628         my $content_type;
2629         # require explicit support from the UA if we are to send the page as
2630         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2631         # we have to do this because MSIE sometimes globs '*/*', pretending to
2632         # support xhtml+xml but choking when it gets what it asked for.
2633         if (defined $cgi->http('HTTP_ACCEPT') &&
2634             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2635             $cgi->Accept('application/xhtml+xml') != 0) {
2636                 $content_type = 'application/xhtml+xml';
2637         } else {
2638                 $content_type = 'text/html';
2639         }
2640         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2641                            -status=> $status, -expires => $expires);
2642         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2643         print <<EOF;
2644 <?xml version="1.0" encoding="utf-8"?>
2645 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2646 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2647 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2648 <!-- git core binaries version $git_version -->
2649 <head>
2650 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2651 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2652 <meta name="robots" content="index, nofollow"/>
2653 <title>$title</title>
2654 EOF
2655 # print out each stylesheet that exist
2656         if (defined $stylesheet) {
2657 #provides backwards capability for those people who define style sheet in a config file
2658                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2659         } else {
2660                 foreach my $stylesheet (@stylesheets) {
2661                         next unless $stylesheet;
2662                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2663                 }
2664         }
2665         if (defined $project) {
2666                 my %href_params = get_feed_info();
2667                 if (!exists $href_params{'-title'}) {
2668                         $href_params{'-title'} = 'log';
2669                 }
2670
2671                 foreach my $format qw(RSS Atom) {
2672                         my $type = lc($format);
2673                         my %link_attr = (
2674                                 '-rel' => 'alternate',
2675                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2676                                 '-type' => "application/$type+xml"
2677                         );
2678
2679                         $href_params{'action'} = $type;
2680                         $link_attr{'-href'} = href(%href_params);
2681                         print "<link ".
2682                               "rel=\"$link_attr{'-rel'}\" ".
2683                               "title=\"$link_attr{'-title'}\" ".
2684                               "href=\"$link_attr{'-href'}\" ".
2685                               "type=\"$link_attr{'-type'}\" ".
2686                               "/>\n";
2687
2688                         $href_params{'extra_options'} = '--no-merges';
2689                         $link_attr{'-href'} = href(%href_params);
2690                         $link_attr{'-title'} .= ' (no merges)';
2691                         print "<link ".
2692                               "rel=\"$link_attr{'-rel'}\" ".
2693                               "title=\"$link_attr{'-title'}\" ".
2694                               "href=\"$link_attr{'-href'}\" ".
2695                               "type=\"$link_attr{'-type'}\" ".
2696                               "/>\n";
2697                 }
2698
2699         } else {
2700                 printf('<link rel="alternate" title="%s projects list" '.
2701                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2702                        $site_name, href(project=>undef, action=>"project_index"));
2703                 printf('<link rel="alternate" title="%s projects feeds" '.
2704                        'href="%s" type="text/x-opml" />'."\n",
2705                        $site_name, href(project=>undef, action=>"opml"));
2706         }
2707         if (defined $favicon) {
2708                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2709         }
2710
2711         print "</head>\n" .
2712               "<body>\n";
2713
2714         if (-f $site_header) {
2715                 open (my $fd, $site_header);
2716                 print <$fd>;
2717                 close $fd;
2718         }
2719
2720         print "<div class=\"page_header\">\n" .
2721               $cgi->a({-href => esc_url($logo_url),
2722                        -title => $logo_label},
2723                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2724         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2725         if (defined $project) {
2726                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2727                 if (defined $action) {
2728                         print " / $action";
2729                 }
2730                 print "\n";
2731         }
2732         print "</div>\n";
2733
2734         my ($have_search) = gitweb_check_feature('search');
2735         if (defined $project && $have_search) {
2736                 if (!defined $searchtext) {
2737                         $searchtext = "";
2738                 }
2739                 my $search_hash;
2740                 if (defined $hash_base) {
2741                         $search_hash = $hash_base;
2742                 } elsif (defined $hash) {
2743                         $search_hash = $hash;
2744                 } else {
2745                         $search_hash = "HEAD";
2746                 }
2747                 my $action = $my_uri;
2748                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2749                 if ($use_pathinfo) {
2750                         $action .= "/".esc_url($project);
2751                 }
2752                 print $cgi->startform(-method => "get", -action => $action) .
2753                       "<div class=\"search\">\n" .
2754                       (!$use_pathinfo &&
2755                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2756                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2757                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2758                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2759                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2760                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2761                       " search:\n",
2762                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2763                       "<span title=\"Extended regular expression\">" .
2764                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2765                                      -checked => $search_use_regexp) .
2766                       "</span>" .
2767                       "</div>" .
2768                       $cgi->end_form() . "\n";
2769         }
2770 }
2771
2772 sub git_footer_html {
2773         my $feed_class = 'rss_logo';
2774
2775         print "<div class=\"page_footer\">\n";
2776         if (defined $project) {
2777                 my $descr = git_get_project_description($project);
2778                 if (defined $descr) {
2779                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2780                 }
2781
2782                 my %href_params = get_feed_info();
2783                 if (!%href_params) {
2784                         $feed_class .= ' generic';
2785                 }
2786                 $href_params{'-title'} ||= 'log';
2787
2788                 foreach my $format qw(RSS Atom) {
2789                         $href_params{'action'} = lc($format);
2790                         print $cgi->a({-href => href(%href_params),
2791                                       -title => "$href_params{'-title'} $format feed",
2792                                       -class => $feed_class}, $format)."\n";
2793                 }
2794
2795         } else {
2796                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2797                               -class => $feed_class}, "OPML") . " ";
2798                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2799                               -class => $feed_class}, "TXT") . "\n";
2800         }
2801         print "</div>\n"; # class="page_footer"
2802
2803         if (-f $site_footer) {
2804                 open (my $fd, $site_footer);
2805                 print <$fd>;
2806                 close $fd;
2807         }
2808
2809         print "</body>\n" .
2810               "</html>";
2811 }
2812
2813 # die_error(<http_status_code>, <error_message>)
2814 # Example: die_error(404, 'Hash not found')
2815 # By convention, use the following status codes (as defined in RFC 2616):
2816 # 400: Invalid or missing CGI parameters, or
2817 #      requested object exists but has wrong type.
2818 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2819 #      this server or project.
2820 # 404: Requested object/revision/project doesn't exist.
2821 # 500: The server isn't configured properly, or
2822 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2823 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2824 sub die_error {
2825         my $status = shift || 500;
2826         my $error = shift || "Internal server error";
2827
2828         my %http_responses = (400 => '400 Bad Request',
2829                               403 => '403 Forbidden',
2830                               404 => '404 Not Found',
2831                               500 => '500 Internal Server Error');
2832         git_header_html($http_responses{$status});
2833         print <<EOF;
2834 <div class="page_body">
2835 <br /><br />
2836 $status - $error
2837 <br />
2838 </div>
2839 EOF
2840         git_footer_html();
2841         exit;
2842 }
2843
2844 ## ----------------------------------------------------------------------
2845 ## functions printing or outputting HTML: navigation
2846
2847 sub git_print_page_nav {
2848         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2849         $extra = '' if !defined $extra; # pager or formats
2850
2851         my @navs = qw(summary shortlog log commit commitdiff tree);
2852         if ($suppress) {
2853                 @navs = grep { $_ ne $suppress } @navs;
2854         }
2855
2856         my %arg = map { $_ => {action=>$_} } @navs;
2857         if (defined $head) {
2858                 for (qw(commit commitdiff)) {
2859                         $arg{$_}{'hash'} = $head;
2860                 }
2861                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2862                         for (qw(shortlog log)) {
2863                                 $arg{$_}{'hash'} = $head;
2864                         }
2865                 }
2866         }
2867
2868         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2869         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2870
2871         my @actions = gitweb_check_feature('actions');
2872         while (@actions) {
2873                 my ($label, $link, $pos) = (shift(@actions), shift(@actions), shift(@actions));
2874                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
2875                 # munch munch
2876                 $link =~ s#%n#$project#g;
2877                 $link =~ s#%f#$git_dir#g;
2878                 $treehead ? $link =~ s#%h#$treehead#g : $link =~ s#%h##g;
2879                 $treebase ? $link =~ s#%b#$treebase#g : $link =~ s#%b##g;
2880                 $arg{$label}{'_href'} = $link;
2881         }
2882
2883         print "<div class=\"page_nav\">\n" .
2884                 (join " | ",
2885                  map { $_ eq $current ?
2886                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
2887                  } @navs);
2888         print "<br/>\n$extra<br/>\n" .
2889               "</div>\n";
2890 }
2891
2892 sub format_paging_nav {
2893         my ($action, $hash, $head, $page, $has_next_link) = @_;
2894         my $paging_nav;
2895
2896
2897         if ($hash ne $head || $page) {
2898                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2899         } else {
2900                 $paging_nav .= "HEAD";
2901         }
2902
2903         if ($page > 0) {
2904                 $paging_nav .= " &sdot; " .
2905                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2906                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2907         } else {
2908                 $paging_nav .= " &sdot; prev";
2909         }
2910
2911         if ($has_next_link) {
2912                 $paging_nav .= " &sdot; " .
2913                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2914                                  -accesskey => "n", -title => "Alt-n"}, "next");
2915         } else {
2916                 $paging_nav .= " &sdot; next";
2917         }
2918
2919         return $paging_nav;
2920 }
2921
2922 ## ......................................................................
2923 ## functions printing or outputting HTML: div
2924
2925 sub git_print_header_div {
2926         my ($action, $title, $hash, $hash_base) = @_;
2927         my %args = ();
2928
2929         $args{'action'} = $action;
2930         $args{'hash'} = $hash if $hash;
2931         $args{'hash_base'} = $hash_base if $hash_base;
2932
2933         print "<div class=\"header\">\n" .
2934               $cgi->a({-href => href(%args), -class => "title"},
2935               $title ? $title : $action) .
2936               "\n</div>\n";
2937 }
2938
2939 #sub git_print_authorship (\%) {
2940 sub git_print_authorship {
2941         my $co = shift;
2942
2943         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2944         print "<div class=\"author_date\">" .
2945               esc_html($co->{'author_name'}) .
2946               " [$ad{'rfc2822'}";
2947         if ($ad{'hour_local'} < 6) {
2948                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2949                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2950         } else {
2951                 printf(" (%02d:%02d %s)",
2952                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2953         }
2954         print "]</div>\n";
2955 }
2956
2957 sub git_print_page_path {
2958         my $name = shift;
2959         my $type = shift;
2960         my $hb = shift;
2961
2962
2963         print "<div class=\"page_path\">";
2964         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2965                       -title => 'tree root'}, to_utf8("[$project]"));
2966         print " / ";
2967         if (defined $name) {
2968                 my @dirname = split '/', $name;
2969                 my $basename = pop @dirname;
2970                 my $fullname = '';
2971
2972                 foreach my $dir (@dirname) {
2973                         $fullname .= ($fullname ? '/' : '') . $dir;
2974                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2975                                                      hash_base=>$hb),
2976                                       -title => $fullname}, esc_path($dir));
2977                         print " / ";
2978                 }
2979                 if (defined $type && $type eq 'blob') {
2980                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2981                                                      hash_base=>$hb),
2982                                       -title => $name}, esc_path($basename));
2983                 } elsif (defined $type && $type eq 'tree') {
2984                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2985                                                      hash_base=>$hb),
2986                                       -title => $name}, esc_path($basename));
2987                         print " / ";
2988                 } else {
2989                         print esc_path($basename);
2990                 }
2991         }
2992         print "<br/></div>\n";
2993 }
2994
2995 # sub git_print_log (\@;%) {
2996 sub git_print_log ($;%) {
2997         my $log = shift;
2998         my %opts = @_;
2999
3000         if ($opts{'-remove_title'}) {
3001                 # remove title, i.e. first line of log
3002                 shift @$log;
3003         }
3004         # remove leading empty lines
3005         while (defined $log->[0] && $log->[0] eq "") {
3006                 shift @$log;
3007         }
3008
3009         # print log
3010         my $signoff = 0;
3011         my $empty = 0;
3012         foreach my $line (@$log) {
3013                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3014                         $signoff = 1;
3015                         $empty = 0;
3016                         if (! $opts{'-remove_signoff'}) {
3017                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3018                                 next;
3019                         } else {
3020                                 # remove signoff lines
3021                                 next;
3022                         }
3023                 } else {
3024                         $signoff = 0;
3025                 }
3026
3027                 # print only one empty line
3028                 # do not print empty line after signoff
3029                 if ($line eq "") {
3030                         next if ($empty || $signoff);
3031                         $empty = 1;
3032                 } else {
3033                         $empty = 0;
3034                 }
3035
3036                 print format_log_line_html($line) . "<br/>\n";
3037         }
3038
3039         if ($opts{'-final_empty_line'}) {
3040                 # end with single empty line
3041                 print "<br/>\n" unless $empty;
3042         }
3043 }
3044
3045 # return link target (what link points to)
3046 sub git_get_link_target {
3047         my $hash = shift;
3048         my $link_target;
3049
3050         # read link
3051         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3052                 or return;
3053         {
3054                 local $/;
3055                 $link_target = <$fd>;
3056         }
3057         close $fd
3058                 or return;
3059
3060         return $link_target;
3061 }
3062
3063 # given link target, and the directory (basedir) the link is in,
3064 # return target of link relative to top directory (top tree);
3065 # return undef if it is not possible (including absolute links).
3066 sub normalize_link_target {
3067         my ($link_target, $basedir, $hash_base) = @_;
3068
3069         # we can normalize symlink target only if $hash_base is provided
3070         return unless $hash_base;
3071
3072         # absolute symlinks (beginning with '/') cannot be normalized
3073         return if (substr($link_target, 0, 1) eq '/');
3074
3075         # normalize link target to path from top (root) tree (dir)
3076         my $path;
3077         if ($basedir) {
3078                 $path = $basedir . '/' . $link_target;
3079         } else {
3080                 # we are in top (root) tree (dir)
3081                 $path = $link_target;
3082         }
3083
3084         # remove //, /./, and /../
3085         my @path_parts;
3086         foreach my $part (split('/', $path)) {
3087                 # discard '.' and ''
3088                 next if (!$part || $part eq '.');
3089                 # handle '..'
3090                 if ($part eq '..') {
3091                         if (@path_parts) {
3092                                 pop @path_parts;
3093                         } else {
3094                                 # link leads outside repository (outside top dir)
3095                                 return;
3096                         }
3097                 } else {
3098                         push @path_parts, $part;
3099                 }
3100         }
3101         $path = join('/', @path_parts);
3102
3103         return $path;
3104 }
3105
3106 # print tree entry (row of git_tree), but without encompassing <tr> element
3107 sub git_print_tree_entry {
3108         my ($t, $basedir, $hash_base, $have_blame) = @_;
3109
3110         my %base_key = ();
3111         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3112
3113         # The format of a table row is: mode list link.  Where mode is
3114         # the mode of the entry, list is the name of the entry, an href,
3115         # and link is the action links of the entry.
3116
3117         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3118         if ($t->{'type'} eq "blob") {
3119                 print "<td class=\"list\">" .
3120                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3121                                                file_name=>"$basedir$t->{'name'}", %base_key),
3122                                 -class => "list"}, esc_path($t->{'name'}));
3123                 if (S_ISLNK(oct $t->{'mode'})) {
3124                         my $link_target = git_get_link_target($t->{'hash'});
3125                         if ($link_target) {
3126                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3127                                 if (defined $norm_target) {
3128                                         print " -> " .
3129                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3130                                                                      file_name=>$norm_target),
3131                                                        -title => $norm_target}, esc_path($link_target));
3132                                 } else {
3133                                         print " -> " . esc_path($link_target);
3134                                 }
3135                         }
3136                 }
3137                 print "</td>\n";
3138                 print "<td class=\"link\">";
3139                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3140                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3141                               "blob");
3142                 if ($have_blame) {
3143                         print " | " .
3144                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3145                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3146                                       "blame");
3147                 }
3148                 if (defined $hash_base) {
3149                         print " | " .
3150                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3151                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3152                                       "history");
3153                 }
3154                 print " | " .
3155                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3156                                                file_name=>"$basedir$t->{'name'}")},
3157                                 "raw");
3158                 print "</td>\n";
3159
3160         } elsif ($t->{'type'} eq "tree") {
3161                 print "<td class=\"list\">";
3162                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3163                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3164                               esc_path($t->{'name'}));
3165                 print "</td>\n";
3166                 print "<td class=\"link\">";
3167                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3168                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3169                               "tree");
3170                 if (defined $hash_base) {
3171                         print " | " .
3172                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3173                                                      file_name=>"$basedir$t->{'name'}")},
3174                                       "history");
3175                 }
3176                 print "</td>\n";
3177         } else {
3178                 # unknown object: we can only present history for it
3179                 # (this includes 'commit' object, i.e. submodule support)
3180                 print "<td class=\"list\">" .
3181                       esc_path($t->{'name'}) .
3182                       "</td>\n";
3183                 print "<td class=\"link\">";
3184                 if (defined $hash_base) {
3185                         print $cgi->a({-href => href(action=>"history",
3186                                                      hash_base=>$hash_base,
3187                                                      file_name=>"$basedir$t->{'name'}")},
3188                                       "history");
3189                 }
3190                 print "</td>\n";
3191         }
3192 }
3193
3194 ## ......................................................................
3195 ## functions printing large fragments of HTML
3196
3197 # get pre-image filenames for merge (combined) diff
3198 sub fill_from_file_info {
3199         my ($diff, @parents) = @_;
3200
3201         $diff->{'from_file'} = [ ];
3202         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3203         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3204                 if ($diff->{'status'}[$i] eq 'R' ||
3205                     $diff->{'status'}[$i] eq 'C') {
3206                         $diff->{'from_file'}[$i] =
3207                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3208                 }
3209         }
3210
3211         return $diff;
3212 }
3213
3214 # is current raw difftree line of file deletion
3215 sub is_deleted {
3216         my $diffinfo = shift;
3217
3218         return $diffinfo->{'to_id'} eq ('0' x 40);
3219 }
3220
3221 # does patch correspond to [previous] difftree raw line
3222 # $diffinfo  - hashref of parsed raw diff format
3223 # $patchinfo - hashref of parsed patch diff format
3224 #              (the same keys as in $diffinfo)
3225 sub is_patch_split {
3226         my ($diffinfo, $patchinfo) = @_;
3227
3228         return defined $diffinfo && defined $patchinfo
3229                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3230 }
3231
3232
3233 sub git_difftree_body {
3234         my ($difftree, $hash, @parents) = @_;
3235         my ($parent) = $parents[0];
3236         my ($have_blame) = gitweb_check_feature('blame');
3237         print "<div class=\"list_head\">\n";
3238         if ($#{$difftree} > 10) {
3239                 print(($#{$difftree} + 1) . " files changed:\n");
3240         }
3241         print "</div>\n";
3242
3243         print "<table class=\"" .
3244               (@parents > 1 ? "combined " : "") .
3245               "diff_tree\">\n";
3246
3247         # header only for combined diff in 'commitdiff' view
3248         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3249         if ($has_header) {
3250                 # table header
3251                 print "<thead><tr>\n" .
3252                        "<th></th><th></th>\n"; # filename, patchN link
3253                 for (my $i = 0; $i < @parents; $i++) {
3254                         my $par = $parents[$i];
3255                         print "<th>" .
3256                               $cgi->a({-href => href(action=>"commitdiff",
3257                                                      hash=>$hash, hash_parent=>$par),
3258                                        -title => 'commitdiff to parent number ' .
3259                                                   ($i+1) . ': ' . substr($par,0,7)},
3260                                       $i+1) .
3261                               "&nbsp;</th>\n";
3262                 }
3263                 print "</tr></thead>\n<tbody>\n";
3264         }
3265
3266         my $alternate = 1;
3267         my $patchno = 0;
3268         foreach my $line (@{$difftree}) {
3269                 my $diff = parsed_difftree_line($line);
3270
3271                 if ($alternate) {
3272                         print "<tr class=\"dark\">\n";
3273                 } else {
3274                         print "<tr class=\"light\">\n";
3275                 }
3276                 $alternate ^= 1;
3277
3278                 if (exists $diff->{'nparents'}) { # combined diff
3279
3280                         fill_from_file_info($diff, @parents)
3281                                 unless exists $diff->{'from_file'};
3282
3283                         if (!is_deleted($diff)) {
3284                                 # file exists in the result (child) commit
3285                                 print "<td>" .
3286                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3287                                                              file_name=>$diff->{'to_file'},
3288                                                              hash_base=>$hash),
3289                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3290                                       "</td>\n";
3291                         } else {
3292                                 print "<td>" .
3293                                       esc_path($diff->{'to_file'}) .
3294                                       "</td>\n";
3295                         }
3296
3297                         if ($action eq 'commitdiff') {
3298                                 # link to patch
3299                                 $patchno++;
3300                                 print "<td class=\"link\">" .
3301                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3302                                       " | " .
3303                                       "</td>\n";
3304                         }
3305
3306                         my $has_history = 0;
3307                         my $not_deleted = 0;
3308                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3309                                 my $hash_parent = $parents[$i];
3310                                 my $from_hash = $diff->{'from_id'}[$i];
3311                                 my $from_path = $diff->{'from_file'}[$i];
3312                                 my $status = $diff->{'status'}[$i];
3313
3314                                 $has_history ||= ($status ne 'A');
3315                                 $not_deleted ||= ($status ne 'D');
3316
3317                                 if ($status eq 'A') {
3318                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3319                                 } elsif ($status eq 'D') {
3320                                         print "<td class=\"link\">" .
3321                                               $cgi->a({-href => href(action=>"blob",
3322                                                                      hash_base=>$hash,
3323                                                                      hash=>$from_hash,
3324                                                                      file_name=>$from_path)},
3325                                                       "blob" . ($i+1)) .
3326                                               " | </td>\n";
3327                                 } else {
3328                                         if ($diff->{'to_id'} eq $from_hash) {
3329                                                 print "<td class=\"link nochange\">";
3330                                         } else {
3331                                                 print "<td class=\"link\">";
3332                                         }
3333                                         print $cgi->a({-href => href(action=>"blobdiff",
3334                                                                      hash=>$diff->{'to_id'},
3335                                                                      hash_parent=>$from_hash,
3336                                                                      hash_base=>$hash,
3337                                                                      hash_parent_base=>$hash_parent,
3338                                                                      file_name=>$diff->{'to_file'},
3339                                                                      file_parent=>$from_path)},
3340                                                       "diff" . ($i+1)) .
3341                                               " | </td>\n";
3342                                 }
3343                         }
3344
3345                         print "<td class=\"link\">";
3346                         if ($not_deleted) {
3347                                 print $cgi->a({-href => href(action=>"blob",
3348                                                              hash=>$diff->{'to_id'},
3349                                                              file_name=>$diff->{'to_file'},
3350                                                              hash_base=>$hash)},
3351                                               "blob");
3352                                 print " | " if ($has_history);
3353                         }
3354                         if ($has_history) {
3355                                 print $cgi->a({-href => href(action=>"history",
3356                                                              file_name=>$diff->{'to_file'},
3357                                                              hash_base=>$hash)},
3358                                               "history");
3359                         }
3360                         print "</td>\n";
3361
3362                         print "</tr>\n";
3363                         next; # instead of 'else' clause, to avoid extra indent
3364                 }
3365                 # else ordinary diff
3366
3367                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3368                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3369                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3370                         $to_mode_oct = oct $diff->{'to_mode'};
3371                         if (S_ISREG($to_mode_oct)) { # only for regular file
3372                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3373                         }
3374                         $to_file_type = file_type($diff->{'to_mode'});
3375                 }
3376                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3377                         $from_mode_oct = oct $diff->{'from_mode'};
3378                         if (S_ISREG($to_mode_oct)) { # only for regular file
3379                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3380                         }
3381                         $from_file_type = file_type($diff->{'from_mode'});
3382                 }
3383
3384                 if ($diff->{'status'} eq "A") { # created
3385                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3386                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3387                         $mode_chng   .= "]</span>";
3388                         print "<td>";
3389                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3390                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3391                                       -class => "list"}, esc_path($diff->{'file'}));
3392                         print "</td>\n";
3393                         print "<td>$mode_chng</td>\n";
3394                         print "<td class=\"link\">";
3395                         if ($action eq 'commitdiff') {
3396                                 # link to patch
3397                                 $patchno++;
3398                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3399                                 print " | ";
3400                         }
3401                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3402                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3403                                       "blob");
3404                         print "</td>\n";
3405
3406                 } elsif ($diff->{'status'} eq "D") { # deleted
3407                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3408                         print "<td>";
3409                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3410                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3411                                        -class => "list"}, esc_path($diff->{'file'}));
3412                         print "</td>\n";
3413                         print "<td>$mode_chng</td>\n";
3414                         print "<td class=\"link\">";
3415                         if ($action eq 'commitdiff') {
3416                                 # link to patch
3417                                 $patchno++;
3418                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3419                                 print " | ";
3420                         }
3421                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3422                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3423                                       "blob") . " | ";
3424                         if ($have_blame) {
3425                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3426                                                              file_name=>$diff->{'file'})},
3427                                               "blame") . " | ";
3428                         }
3429                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3430                                                      file_name=>$diff->{'file'})},
3431                                       "history");
3432                         print "</td>\n";
3433
3434                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3435                         my $mode_chnge = "";
3436                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3437                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3438                                 if ($from_file_type ne $to_file_type) {
3439                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3440                                 }
3441                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3442                                         if ($from_mode_str && $to_mode_str) {
3443                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3444                                         } elsif ($to_mode_str) {
3445                                                 $mode_chnge .= " mode: $to_mode_str";
3446                                         }
3447                                 }
3448                                 $mode_chnge .= "]</span>\n";
3449                         }
3450                         print "<td>";
3451                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3452                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3453                                       -class => "list"}, esc_path($diff->{'file'}));
3454                         print "</td>\n";
3455                         print "<td>$mode_chnge</td>\n";
3456                         print "<td class=\"link\">";
3457                         if ($action eq 'commitdiff') {
3458                                 # link to patch
3459                                 $patchno++;
3460                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3461                                       " | ";
3462                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3463                                 # "commit" view and modified file (not onlu mode changed)
3464                                 print $cgi->a({-href => href(action=>"blobdiff",
3465                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3466                                                              hash_base=>$hash, hash_parent_base=>$parent,
3467                                                              file_name=>$diff->{'file'})},
3468                                               "diff") .
3469                                       " | ";
3470                         }
3471                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3472                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3473                                        "blob") . " | ";
3474                         if ($have_blame) {
3475                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3476                                                              file_name=>$diff->{'file'})},
3477                                               "blame") . " | ";
3478                         }
3479                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3480                                                      file_name=>$diff->{'file'})},
3481                                       "history");
3482                         print "</td>\n";
3483
3484                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3485                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3486                         my $nstatus = $status_name{$diff->{'status'}};
3487                         my $mode_chng = "";
3488                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3489                                 # mode also for directories, so we cannot use $to_mode_str
3490                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3491                         }
3492                         print "<td>" .
3493                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3494                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3495                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3496                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3497                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3498                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3499                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3500                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3501                               "<td class=\"link\">";
3502                         if ($action eq 'commitdiff') {
3503                                 # link to patch
3504                                 $patchno++;
3505                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3506                                       " | ";
3507                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3508                                 # "commit" view and modified file (not only pure rename or copy)
3509                                 print $cgi->a({-href => href(action=>"blobdiff",
3510                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3511                                                              hash_base=>$hash, hash_parent_base=>$parent,
3512                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3513                                               "diff") .
3514                                       " | ";
3515                         }
3516                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3517                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3518                                       "blob") . " | ";
3519                         if ($have_blame) {
3520                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3521                                                              file_name=>$diff->{'to_file'})},
3522                                               "blame") . " | ";
3523                         }
3524                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3525                                                     file_name=>$diff->{'to_file'})},
3526                                       "history");
3527                         print "</td>\n";
3528
3529                 } # we should not encounter Unmerged (U) or Unknown (X) status
3530                 print "</tr>\n";
3531         }
3532         print "</tbody>" if $has_header;
3533         print "</table>\n";
3534 }
3535
3536 sub git_patchset_body {
3537         my ($fd, $difftree, $hash, @hash_parents) = @_;
3538         my ($hash_parent) = $hash_parents[0];
3539
3540         my $is_combined = (@hash_parents > 1);
3541         my $patch_idx = 0;
3542         my $patch_number = 0;
3543         my $patch_line;
3544         my $diffinfo;
3545         my $to_name;
3546         my (%from, %to);
3547
3548         print "<div class=\"patchset\">\n";
3549
3550         # skip to first patch
3551         while ($patch_line = <$fd>) {
3552                 chomp $patch_line;
3553
3554                 last if ($patch_line =~ m/^diff /);
3555         }
3556
3557  PATCH:
3558         while ($patch_line) {
3559
3560                 # parse "git diff" header line
3561                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3562                         # $1 is from_name, which we do not use
3563                         $to_name = unquote($2);
3564                         $to_name =~ s!^b/!!;
3565                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3566                         # $1 is 'cc' or 'combined', which we do not use
3567                         $to_name = unquote($2);
3568                 } else {
3569                         $to_name = undef;
3570                 }
3571
3572                 # check if current patch belong to current raw line
3573                 # and parse raw git-diff line if needed
3574                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3575                         # this is continuation of a split patch
3576                         print "<div class=\"patch cont\">\n";
3577                 } else {
3578                         # advance raw git-diff output if needed
3579                         $patch_idx++ if defined $diffinfo;
3580
3581                         # read and prepare patch information
3582                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3583
3584                         # compact combined diff output can have some patches skipped
3585                         # find which patch (using pathname of result) we are at now;
3586                         if ($is_combined) {
3587                                 while ($to_name ne $diffinfo->{'to_file'}) {
3588                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3589                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3590                                               "</div>\n";  # class="patch"
3591
3592                                         $patch_idx++;
3593                                         $patch_number++;
3594
3595                                         last if $patch_idx > $#$difftree;
3596                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3597                                 }
3598                         }
3599
3600                         # modifies %from, %to hashes
3601                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3602
3603                         # this is first patch for raw difftree line with $patch_idx index
3604                         # we index @$difftree array from 0, but number patches from 1
3605                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3606                 }
3607
3608                 # git diff header
3609                 #assert($patch_line =~ m/^diff /) if DEBUG;
3610                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3611                 $patch_number++;
3612                 # print "git diff" header
3613                 print format_git_diff_header_line($patch_line, $diffinfo,
3614                                                   \%from, \%to);
3615
3616                 # print extended diff header
3617                 print "<div class=\"diff extended_header\">\n";
3618         EXTENDED_HEADER:
3619                 while ($patch_line = <$fd>) {
3620                         chomp $patch_line;
3621
3622                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3623
3624                         print format_extended_diff_header_line($patch_line, $diffinfo,
3625                                                                \%from, \%to);
3626                 }
3627                 print "</div>\n"; # class="diff extended_header"
3628
3629                 # from-file/to-file diff header
3630                 if (! $patch_line) {
3631                         print "</div>\n"; # class="patch"
3632                         last PATCH;
3633                 }
3634                 next PATCH if ($patch_line =~ m/^diff /);
3635                 #assert($patch_line =~ m/^---/) if DEBUG;
3636
3637                 my $last_patch_line = $patch_line;
3638                 $patch_line = <$fd>;
3639                 chomp $patch_line;
3640                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3641
3642                 print format_diff_from_to_header($last_patch_line, $patch_line,
3643                                                  $diffinfo, \%from, \%to,
3644                                                  @hash_parents);
3645
3646                 # the patch itself
3647         LINE:
3648                 while ($patch_line = <$fd>) {
3649                         chomp $patch_line;
3650
3651                         next PATCH if ($patch_line =~ m/^diff /);
3652
3653                         print format_diff_line($patch_line, \%from, \%to);
3654                 }
3655
3656         } continue {
3657                 print "</div>\n"; # class="patch"
3658         }
3659
3660         # for compact combined (--cc) format, with chunk and patch simpliciaction
3661         # patchset might be empty, but there might be unprocessed raw lines
3662         for (++$patch_idx if $patch_number > 0;
3663              $patch_idx < @$difftree;
3664              ++$patch_idx) {
3665                 # read and prepare patch information
3666                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3667
3668                 # generate anchor for "patch" links in difftree / whatchanged part
3669                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3670                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3671                       "</div>\n";  # class="patch"
3672
3673                 $patch_number++;
3674         }
3675
3676         if ($patch_number == 0) {
3677                 if (@hash_parents > 1) {
3678                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3679                 } else {
3680                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3681                 }
3682         }
3683
3684         print "</div>\n"; # class="patchset"
3685 }
3686
3687 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3688
3689 # fills project list info (age, description, owner, forks) for each
3690 # project in the list, removing invalid projects from returned list
3691 # NOTE: modifies $projlist, but does not remove entries from it
3692 sub fill_project_list_info {
3693         my ($projlist, $check_forks) = @_;
3694         my @projects;
3695
3696         my $show_ctags = gitweb_check_feature('ctags');
3697  PROJECT:
3698         foreach my $pr (@$projlist) {
3699                 my (@activity) = git_get_last_activity($pr->{'path'});
3700                 unless (@activity) {
3701                         next PROJECT;
3702                 }
3703                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3704                 if (!defined $pr->{'descr'}) {
3705                         my $descr = git_get_project_description($pr->{'path'}) || "";
3706                         $descr = to_utf8($descr);
3707                         $pr->{'descr_long'} = $descr;
3708                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3709                 }
3710                 if (!defined $pr->{'owner'}) {
3711                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3712                 }
3713                 if ($check_forks) {
3714                         my $pname = $pr->{'path'};
3715                         if (($pname =~ s/\.git$//) &&
3716                             ($pname !~ /\/$/) &&
3717                             (-d "$projectroot/$pname")) {
3718                                 $pr->{'forks'} = "-d $projectroot/$pname";
3719                         }       else {
3720                                 $pr->{'forks'} = 0;
3721                         }
3722                 }
3723                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3724                 push @projects, $pr;
3725         }
3726
3727         return @projects;
3728 }
3729
3730 # print 'sort by' <th> element, generating 'sort by $name' replay link
3731 # if that order is not selected
3732 sub print_sort_th {
3733         my ($name, $order, $header) = @_;
3734         $header ||= ucfirst($name);
3735
3736         if ($order eq $name) {
3737                 print "<th>$header</th>\n";
3738         } else {
3739                 print "<th>" .
3740                       $cgi->a({-href => href(-replay=>1, order=>$name),
3741                                -class => "header"}, $header) .
3742                       "</th>\n";
3743         }
3744 }
3745
3746 sub git_project_list_body {
3747         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3748
3749         my ($check_forks) = gitweb_check_feature('forks');
3750         my @projects = fill_project_list_info($projlist, $check_forks);
3751
3752         $order ||= $default_projects_order;
3753         $from = 0 unless defined $from;
3754         $to = $#projects if (!defined $to || $#projects < $to);
3755
3756         my %order_info = (
3757                 project => { key => 'path', type => 'str' },
3758                 descr => { key => 'descr_long', type => 'str' },
3759                 owner => { key => 'owner', type => 'str' },
3760                 age => { key => 'age', type => 'num' }
3761         );
3762         my $oi = $order_info{$order};
3763         if ($oi->{'type'} eq 'str') {
3764                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3765         } else {
3766                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3767         }
3768
3769         my $show_ctags = gitweb_check_feature('ctags');
3770         if ($show_ctags) {
3771                 my %ctags;
3772                 foreach my $p (@projects) {
3773                         foreach my $ct (keys %{$p->{'ctags'}}) {
3774                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3775                         }
3776                 }
3777                 my $cloud = git_populate_project_tagcloud(\%ctags);
3778                 print git_show_project_tagcloud($cloud, 64);
3779         }
3780
3781         print "<table class=\"project_list\">\n";
3782         unless ($no_header) {
3783                 print "<tr>\n";
3784                 if ($check_forks) {
3785                         print "<th></th>\n";
3786                 }
3787                 print_sort_th('project', $order, 'Project');
3788                 print_sort_th('descr', $order, 'Description');
3789                 print_sort_th('owner', $order, 'Owner');
3790                 print_sort_th('age', $order, 'Last Change');
3791                 print "<th></th>\n" . # for links
3792                       "</tr>\n";
3793         }
3794         my $alternate = 1;
3795         my $tagfilter = $cgi->param('by_tag');
3796         for (my $i = $from; $i <= $to; $i++) {
3797                 my $pr = $projects[$i];
3798                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3799                 if ($alternate) {
3800                         print "<tr class=\"dark\">\n";
3801                 } else {
3802                         print "<tr class=\"light\">\n";
3803                 }
3804                 $alternate ^= 1;
3805                 if ($check_forks) {
3806                         print "<td>";
3807                         if ($pr->{'forks'}) {
3808                                 print "<!-- $pr->{'forks'} -->\n";
3809                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3810                         }
3811                         print "</td>\n";
3812                 }
3813                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3814                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3815                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3816                                         -class => "list", -title => $pr->{'descr_long'}},
3817                                         esc_html($pr->{'descr'})) . "</td>\n" .
3818                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3819                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3820                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3821                       "<td class=\"link\">" .
3822                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3823                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3824                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3825                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3826                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3827                       "</td>\n" .
3828                       "</tr>\n";
3829         }
3830         if (defined $extra) {
3831                 print "<tr>\n";
3832                 if ($check_forks) {
3833                         print "<td></td>\n";
3834                 }
3835                 print "<td colspan=\"5\">$extra</td>\n" .
3836                       "</tr>\n";
3837         }
3838         print "</table>\n";
3839 }
3840
3841 sub git_shortlog_body {
3842         # uses global variable $project
3843         my ($commitlist, $from, $to, $refs, $extra) = @_;
3844
3845         $from = 0 unless defined $from;
3846         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3847
3848         print "<table class=\"shortlog\">\n";
3849         my $alternate = 1;
3850         for (my $i = $from; $i <= $to; $i++) {
3851                 my %co = %{$commitlist->[$i]};
3852                 my $commit = $co{'id'};
3853                 my $ref = format_ref_marker($refs, $commit);
3854                 if ($alternate) {
3855                         print "<tr class=\"dark\">\n";
3856                 } else {
3857                         print "<tr class=\"light\">\n";
3858                 }
3859                 $alternate ^= 1;
3860                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3861                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3862                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3863                       "<td><i>" . $author . "</i></td>\n" .
3864                       "<td>";
3865                 print format_subject_html($co{'title'}, $co{'title_short'},
3866                                           href(action=>"commit", hash=>$commit), $ref);
3867                 print "</td>\n" .
3868                       "<td class=\"link\">" .
3869                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3870                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3871                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3872                 my $snapshot_links = format_snapshot_links($commit);
3873                 if (defined $snapshot_links) {
3874                         print " | " . $snapshot_links;
3875                 }
3876                 print "</td>\n" .
3877                       "</tr>\n";
3878         }
3879         if (defined $extra) {
3880                 print "<tr>\n" .
3881                       "<td colspan=\"4\">$extra</td>\n" .
3882                       "</tr>\n";
3883         }
3884         print "</table>\n";
3885 }
3886
3887 sub git_history_body {
3888         # Warning: assumes constant type (blob or tree) during history
3889         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3890
3891         $from = 0 unless defined $from;
3892         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3893
3894         print "<table class=\"history\">\n";
3895         my $alternate = 1;
3896         for (my $i = $from; $i <= $to; $i++) {
3897                 my %co = %{$commitlist->[$i]};
3898                 if (!%co) {
3899                         next;
3900                 }
3901                 my $commit = $co{'id'};
3902
3903                 my $ref = format_ref_marker($refs, $commit);
3904
3905                 if ($alternate) {
3906                         print "<tr class=\"dark\">\n";
3907                 } else {
3908                         print "<tr class=\"light\">\n";
3909                 }
3910                 $alternate ^= 1;
3911         # shortlog uses      chop_str($co{'author_name'}, 10)
3912                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3913                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3914                       "<td><i>" . $author . "</i></td>\n" .
3915                       "<td>";
3916                 # originally git_history used chop_str($co{'title'}, 50)
3917                 print format_subject_html($co{'title'}, $co{'title_short'},
3918                                           href(action=>"commit", hash=>$commit), $ref);
3919                 print "</td>\n" .
3920                       "<td class=\"link\">" .
3921                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3922                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3923
3924                 if ($ftype eq 'blob') {
3925                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3926                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3927                         if (defined $blob_current && defined $blob_parent &&
3928                                         $blob_current ne $blob_parent) {
3929                                 print " | " .
3930                                         $cgi->a({-href => href(action=>"blobdiff",
3931                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3932                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3933                                                                file_name=>$file_name)},
3934                                                 "diff to current");
3935                         }
3936                 }
3937                 print "</td>\n" .
3938                       "</tr>\n";
3939         }
3940         if (defined $extra) {
3941                 print "<tr>\n" .
3942                       "<td colspan=\"4\">$extra</td>\n" .
3943                       "</tr>\n";
3944         }
3945         print "</table>\n";
3946 }
3947
3948 sub git_tags_body {
3949         # uses global variable $project
3950         my ($taglist, $from, $to, $extra) = @_;
3951         $from = 0 unless defined $from;
3952         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3953
3954         print "<table class=\"tags\">\n";
3955         my $alternate = 1;
3956         for (my $i = $from; $i <= $to; $i++) {
3957                 my $entry = $taglist->[$i];
3958                 my %tag = %$entry;
3959                 my $comment = $tag{'subject'};
3960                 my $comment_short;
3961                 if (defined $comment) {
3962                         $comment_short = chop_str($comment, 30, 5);
3963                 }
3964                 if ($alternate) {
3965                         print "<tr class=\"dark\">\n";
3966                 } else {
3967                         print "<tr class=\"light\">\n";
3968                 }
3969                 $alternate ^= 1;
3970                 if (defined $tag{'age'}) {
3971                         print "<td><i>$tag{'age'}</i></td>\n";
3972                 } else {
3973                         print "<td></td>\n";
3974                 }
3975                 print "<td>" .
3976                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3977                                -class => "list name"}, esc_html($tag{'name'})) .
3978                       "</td>\n" .
3979                       "<td>";
3980                 if (defined $comment) {
3981                         print format_subject_html($comment, $comment_short,
3982                                                   href(action=>"tag", hash=>$tag{'id'}));
3983                 }
3984                 print "</td>\n" .
3985                       "<td class=\"selflink\">";
3986                 if ($tag{'type'} eq "tag") {
3987                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3988                 } else {
3989                         print "&nbsp;";
3990                 }
3991                 print "</td>\n" .
3992                       "<td class=\"link\">" . " | " .
3993                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3994                 if ($tag{'reftype'} eq "commit") {
3995                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3996                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3997                 } elsif ($tag{'reftype'} eq "blob") {
3998                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3999                 }
4000                 print "</td>\n" .
4001                       "</tr>";
4002         }
4003         if (defined $extra) {
4004                 print "<tr>\n" .
4005                       "<td colspan=\"5\">$extra</td>\n" .
4006                       "</tr>\n";
4007         }
4008         print "</table>\n";
4009 }
4010
4011 sub git_heads_body {
4012         # uses global variable $project
4013         my ($headlist, $head, $from, $to, $extra) = @_;
4014         $from = 0 unless defined $from;
4015         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4016
4017         print "<table class=\"heads\">\n";
4018         my $alternate = 1;
4019         for (my $i = $from; $i <= $to; $i++) {
4020                 my $entry = $headlist->[$i];
4021                 my %ref = %$entry;
4022                 my $curr = $ref{'id'} eq $head;
4023                 if ($alternate) {
4024                         print "<tr class=\"dark\">\n";
4025                 } else {
4026                         print "<tr class=\"light\">\n";
4027                 }
4028                 $alternate ^= 1;
4029                 print "<td><i>$ref{'age'}</i></td>\n" .
4030                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4031                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4032                                -class => "list name"},esc_html($ref{'name'})) .
4033                       "</td>\n" .
4034                       "<td class=\"link\">" .
4035                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4036                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4037                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4038                       "</td>\n" .
4039                       "</tr>";
4040         }
4041         if (defined $extra) {
4042                 print "<tr>\n" .
4043                       "<td colspan=\"3\">$extra</td>\n" .
4044                       "</tr>\n";
4045         }
4046         print "</table>\n";
4047 }
4048
4049 sub git_search_grep_body {
4050         my ($commitlist, $from, $to, $extra) = @_;
4051         $from = 0 unless defined $from;
4052         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4053
4054         print "<table class=\"commit_search\">\n";
4055         my $alternate = 1;
4056         for (my $i = $from; $i <= $to; $i++) {
4057                 my %co = %{$commitlist->[$i]};
4058                 if (!%co) {
4059                         next;
4060                 }
4061                 my $commit = $co{'id'};
4062                 if ($alternate) {
4063                         print "<tr class=\"dark\">\n";
4064                 } else {
4065                         print "<tr class=\"light\">\n";
4066                 }
4067                 $alternate ^= 1;
4068                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4069                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4070                       "<td><i>" . $author . "</i></td>\n" .
4071                       "<td>" .
4072                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4073                                -class => "list subject"},
4074                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4075                 my $comment = $co{'comment'};
4076                 foreach my $line (@$comment) {
4077                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4078                                 my ($lead, $match, $trail) = ($1, $2, $3);
4079                                 $match = chop_str($match, 70, 5, 'center');
4080                                 my $contextlen = int((80 - length($match))/2);
4081                                 $contextlen = 30 if ($contextlen > 30);
4082                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4083                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4084
4085                                 $lead  = esc_html($lead);
4086                                 $match = esc_html($match);
4087                                 $trail = esc_html($trail);
4088
4089                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4090                         }
4091                 }
4092                 print "</td>\n" .
4093                       "<td class=\"link\">" .
4094                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4095                       " | " .
4096                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4097                       " | " .
4098                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4099                 print "</td>\n" .
4100                       "</tr>\n";
4101         }
4102         if (defined $extra) {
4103                 print "<tr>\n" .
4104                       "<td colspan=\"3\">$extra</td>\n" .
4105                       "</tr>\n";
4106         }
4107         print "</table>\n";
4108 }
4109
4110 ## ======================================================================
4111 ## ======================================================================
4112 ## actions
4113
4114 sub git_project_list {
4115         my $order = $cgi->param('o');
4116         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4117                 die_error(400, "Unknown order parameter");
4118         }
4119
4120         my @list = git_get_projects_list();
4121         if (!@list) {
4122                 die_error(404, "No projects found");
4123         }
4124
4125         git_header_html();
4126         if (-f $home_text) {
4127                 print "<div class=\"index_include\">\n";
4128                 open (my $fd, $home_text);
4129                 print <$fd>;
4130                 close $fd;
4131                 print "</div>\n";
4132         }
4133         git_project_list_body(\@list, $order);
4134         git_footer_html();
4135 }
4136
4137 sub git_forks {
4138         my $order = $cgi->param('o');
4139         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4140                 die_error(400, "Unknown order parameter");
4141         }
4142
4143         my @list = git_get_projects_list($project);
4144         if (!@list) {
4145                 die_error(404, "No forks found");
4146         }
4147
4148         git_header_html();
4149         git_print_page_nav('','');
4150         git_print_header_div('summary', "$project forks");
4151         git_project_list_body(\@list, $order);
4152         git_footer_html();
4153 }
4154
4155 sub git_project_index {
4156         my @projects = git_get_projects_list($project);
4157
4158         print $cgi->header(
4159                 -type => 'text/plain',
4160                 -charset => 'utf-8',
4161                 -content_disposition => 'inline; filename="index.aux"');
4162
4163         foreach my $pr (@projects) {
4164                 if (!exists $pr->{'owner'}) {
4165                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4166                 }
4167
4168                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4169                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4170                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4171                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4172                 $path  =~ s/ /\+/g;
4173                 $owner =~ s/ /\+/g;
4174
4175                 print "$path $owner\n";
4176         }
4177 }
4178
4179 sub git_summary {
4180         my $descr = git_get_project_description($project) || "none";
4181         my %co = parse_commit("HEAD");
4182         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4183         my $head = $co{'id'};
4184
4185         my $owner = git_get_project_owner($project);
4186
4187         my $refs = git_get_references();
4188         # These get_*_list functions return one more to allow us to see if
4189         # there are more ...
4190         my @taglist  = git_get_tags_list(16);
4191         my @headlist = git_get_heads_list(16);
4192         my @forklist;
4193         my ($check_forks) = gitweb_check_feature('forks');
4194
4195         if ($check_forks) {
4196                 @forklist = git_get_projects_list($project);
4197         }
4198
4199         git_header_html();
4200         git_print_page_nav('summary','', $head);
4201
4202         print "<div class=\"title\">&nbsp;</div>\n";
4203         print "<table class=\"projects_list\">\n" .
4204               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4205               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4206         if (defined $cd{'rfc2822'}) {
4207                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4208         }
4209
4210         # use per project git URL list in $projectroot/$project/cloneurl
4211         # or make project git URL from git base URL and project name
4212         my $url_tag = "URL";
4213         my @url_list = git_get_project_url_list($project);
4214         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4215         foreach my $git_url (@url_list) {
4216                 next unless $git_url;
4217                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4218                 $url_tag = "";
4219         }
4220
4221         # Tag cloud
4222         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4223         if ($show_ctags) {
4224                 my $ctags = git_get_project_ctags($project);
4225                 my $cloud = git_populate_project_tagcloud($ctags);
4226                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4227                 print "</td>\n<td>" unless %$ctags;
4228                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4229                 print "</td>\n<td>" if %$ctags;
4230                 print git_show_project_tagcloud($cloud, 48);
4231                 print "</td></tr>";
4232         }
4233
4234         print "</table>\n";
4235
4236         if (-s "$projectroot/$project/README.html") {
4237                 if (open my $fd, "$projectroot/$project/README.html") {
4238                         print "<div class=\"title\">readme</div>\n" .
4239                               "<div class=\"readme\">\n";
4240                         print $_ while (<$fd>);
4241                         print "\n</div>\n"; # class="readme"
4242                         close $fd;
4243                 }
4244         }
4245
4246         # we need to request one more than 16 (0..15) to check if
4247         # those 16 are all
4248         my @commitlist = $head ? parse_commits($head, 17) : ();
4249         if (@commitlist) {
4250                 git_print_header_div('shortlog');
4251                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4252                                   $#commitlist <=  15 ? undef :
4253                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4254         }
4255
4256         if (@taglist) {
4257                 git_print_header_div('tags');
4258                 git_tags_body(\@taglist, 0, 15,
4259                               $#taglist <=  15 ? undef :
4260                               $cgi->a({-href => href(action=>"tags")}, "..."));
4261         }
4262
4263         if (@headlist) {
4264                 git_print_header_div('heads');
4265                 git_heads_body(\@headlist, $head, 0, 15,
4266                                $#headlist <= 15 ? undef :
4267                                $cgi->a({-href => href(action=>"heads")}, "..."));
4268         }
4269
4270         if (@forklist) {
4271                 git_print_header_div('forks');
4272                 git_project_list_body(\@forklist, 'age', 0, 15,
4273                                       $#forklist <= 15 ? undef :
4274                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4275                                       'no_header');
4276         }
4277
4278         git_footer_html();
4279 }
4280
4281 sub git_tag {
4282         my $head = git_get_head_hash($project);
4283         git_header_html();
4284         git_print_page_nav('','', $head,undef,$head);
4285         my %tag = parse_tag($hash);
4286
4287         if (! %tag) {
4288                 die_error(404, "Unknown tag object");
4289         }
4290
4291         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4292         print "<div class=\"title_text\">\n" .
4293               "<table class=\"object_header\">\n" .
4294               "<tr>\n" .
4295               "<td>object</td>\n" .
4296               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4297                                $tag{'object'}) . "</td>\n" .
4298               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4299                                               $tag{'type'}) . "</td>\n" .
4300               "</tr>\n";
4301         if (defined($tag{'author'})) {
4302                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4303                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4304                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4305                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4306                         "</td></tr>\n";
4307         }
4308         print "</table>\n\n" .
4309               "</div>\n";
4310         print "<div class=\"page_body\">";
4311         my $comment = $tag{'comment'};
4312         foreach my $line (@$comment) {
4313                 chomp $line;
4314                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4315         }
4316         print "</div>\n";
4317         git_footer_html();
4318 }
4319
4320 sub git_blame {
4321         my $fd;
4322         my $ftype;
4323
4324         gitweb_check_feature('blame')
4325             or die_error(403, "Blame view not allowed");
4326
4327         die_error(400, "No file name given") unless $file_name;
4328         $hash_base ||= git_get_head_hash($project);
4329         die_error(404, "Couldn't find base commit") unless ($hash_base);
4330         my %co = parse_commit($hash_base)
4331                 or die_error(404, "Commit not found");
4332         if (!defined $hash) {
4333                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4334                         or die_error(404, "Error looking up file");
4335         }
4336         $ftype = git_get_type($hash);
4337         if ($ftype !~ "blob") {
4338                 die_error(400, "Object is not a blob");
4339         }
4340         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4341               $file_name, $hash_base)
4342                 or die_error(500, "Open git-blame failed");
4343         git_header_html();
4344         my $formats_nav =
4345                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4346                         "blob") .
4347                 " | " .
4348                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4349                         "history") .
4350                 " | " .
4351                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4352                         "HEAD");
4353         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4354         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4355         git_print_page_path($file_name, $ftype, $hash_base);
4356         my @rev_color = (qw(light2 dark2));
4357         my $num_colors = scalar(@rev_color);
4358         my $current_color = 0;
4359         my $last_rev;
4360         print <<HTML;
4361 <div class="page_body">
4362 <table class="blame">
4363 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4364 HTML
4365         my %metainfo = ();
4366         while (1) {
4367                 $_ = <$fd>;
4368                 last unless defined $_;
4369                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4370                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4371                 if (!exists $metainfo{$full_rev}) {
4372                         $metainfo{$full_rev} = {};
4373                 }
4374                 my $meta = $metainfo{$full_rev};
4375                 while (<$fd>) {
4376                         last if (s/^\t//);
4377                         if (/^(\S+) (.*)$/) {
4378                                 $meta->{$1} = $2;
4379                         }
4380                 }
4381                 my $data = $_;
4382                 chomp $data;
4383                 my $rev = substr($full_rev, 0, 8);
4384                 my $author = $meta->{'author'};
4385                 my %date = parse_date($meta->{'author-time'},
4386                                       $meta->{'author-tz'});
4387                 my $date = $date{'iso-tz'};
4388                 if ($group_size) {
4389                         $current_color = ++$current_color % $num_colors;
4390                 }
4391                 print "<tr class=\"$rev_color[$current_color]\">\n";
4392                 if ($group_size) {
4393                         print "<td class=\"sha1\"";
4394                         print " title=\"". esc_html($author) . ", $date\"";
4395                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4396                         print ">";
4397                         print $cgi->a({-href => href(action=>"commit",
4398                                                      hash=>$full_rev,
4399                                                      file_name=>$file_name)},
4400                                       esc_html($rev));
4401                         print "</td>\n";
4402                 }
4403                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4404                         or die_error(500, "Open git-rev-parse failed");
4405                 my $parent_commit = <$dd>;
4406                 close $dd;
4407                 chomp($parent_commit);
4408                 my $blamed = href(action => 'blame',
4409                                   file_name => $meta->{'filename'},
4410                                   hash_base => $parent_commit);
4411                 print "<td class=\"linenr\">";
4412                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4413                                 -id => "l$lineno",
4414                                 -class => "linenr" },
4415                               esc_html($lineno));
4416                 print "</td>";
4417                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4418                 print "</tr>\n";
4419         }
4420         print "</table>\n";
4421         print "</div>";
4422         close $fd
4423                 or print "Reading blob failed\n";
4424         git_footer_html();
4425 }
4426
4427 sub git_tags {
4428         my $head = git_get_head_hash($project);
4429         git_header_html();
4430         git_print_page_nav('','', $head,undef,$head);
4431         git_print_header_div('summary', $project);
4432
4433         my @tagslist = git_get_tags_list();
4434         if (@tagslist) {
4435                 git_tags_body(\@tagslist);
4436         }
4437         git_footer_html();
4438 }
4439
4440 sub git_heads {
4441         my $head = git_get_head_hash($project);
4442         git_header_html();
4443         git_print_page_nav('','', $head,undef,$head);
4444         git_print_header_div('summary', $project);
4445
4446         my @headslist = git_get_heads_list();
4447         if (@headslist) {
4448                 git_heads_body(\@headslist, $head);
4449         }
4450         git_footer_html();
4451 }
4452
4453 sub git_blob_plain {
4454         my $type = shift;
4455         my $expires;
4456
4457         if (!defined $hash) {
4458                 if (defined $file_name) {
4459                         my $base = $hash_base || git_get_head_hash($project);
4460                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4461                                 or die_error(404, "Cannot find file");
4462                 } else {
4463                         die_error(400, "No file name defined");
4464                 }
4465         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4466                 # blobs defined by non-textual hash id's can be cached
4467                 $expires = "+1d";
4468         }
4469
4470         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4471                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4472
4473         # content-type (can include charset)
4474         $type = blob_contenttype($fd, $file_name, $type);
4475
4476         # "save as" filename, even when no $file_name is given
4477         my $save_as = "$hash";
4478         if (defined $file_name) {
4479                 $save_as = $file_name;
4480         } elsif ($type =~ m/^text\//) {
4481                 $save_as .= '.txt';
4482         }
4483
4484         print $cgi->header(
4485                 -type => $type,
4486                 -expires => $expires,
4487                 -content_disposition => 'inline; filename="' . $save_as . '"');
4488         undef $/;
4489         binmode STDOUT, ':raw';
4490         print <$fd>;
4491         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4492         $/ = "\n";
4493         close $fd;
4494 }
4495
4496 sub git_blob {
4497         my $expires;
4498
4499         if (!defined $hash) {
4500                 if (defined $file_name) {
4501                         my $base = $hash_base || git_get_head_hash($project);
4502                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4503                                 or die_error(404, "Cannot find file");
4504                 } else {
4505                         die_error(400, "No file name defined");
4506                 }
4507         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4508                 # blobs defined by non-textual hash id's can be cached
4509                 $expires = "+1d";
4510         }
4511
4512         my ($have_blame) = gitweb_check_feature('blame');
4513         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4514                 or die_error(500, "Couldn't cat $file_name, $hash");
4515         my $mimetype = blob_mimetype($fd, $file_name);
4516         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4517                 close $fd;
4518                 return git_blob_plain($mimetype);
4519         }
4520         # we can have blame only for text/* mimetype
4521         $have_blame &&= ($mimetype =~ m!^text/!);
4522
4523         git_header_html(undef, $expires);
4524         my $formats_nav = '';
4525         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4526                 if (defined $file_name) {
4527                         if ($have_blame) {
4528                                 $formats_nav .=
4529                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4530                                                 "blame") .
4531                                         " | ";
4532                         }
4533                         $formats_nav .=
4534                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4535                                         "history") .
4536                                 " | " .
4537                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4538                                         "raw") .
4539                                 " | " .
4540                                 $cgi->a({-href => href(action=>"blob",
4541                                                        hash_base=>"HEAD", file_name=>$file_name)},
4542                                         "HEAD");
4543                 } else {
4544                         $formats_nav .=
4545                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4546                                         "raw");
4547                 }
4548                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4549                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4550         } else {
4551                 print "<div class=\"page_nav\">\n" .
4552                       "<br/><br/></div>\n" .
4553                       "<div class=\"title\">$hash</div>\n";
4554         }
4555         git_print_page_path($file_name, "blob", $hash_base);
4556         print "<div class=\"page_body\">\n";
4557         if ($mimetype =~ m!^image/!) {
4558                 print qq!<img type="$mimetype"!;
4559                 if ($file_name) {
4560                         print qq! alt="$file_name" title="$file_name"!;
4561                 }
4562                 print qq! src="! .
4563                       href(action=>"blob_plain", hash=>$hash,
4564                            hash_base=>$hash_base, file_name=>$file_name) .
4565                       qq!" />\n!;
4566         } else {
4567                 my $nr;
4568                 while (my $line = <$fd>) {
4569                         chomp $line;
4570                         $nr++;
4571                         $line = untabify($line);
4572                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4573                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4574                 }
4575         }
4576         close $fd
4577                 or print "Reading blob failed.\n";
4578         print "</div>";
4579         git_footer_html();
4580 }
4581
4582 sub git_tree {
4583         if (!defined $hash_base) {
4584                 $hash_base = "HEAD";
4585         }
4586         if (!defined $hash) {
4587                 if (defined $file_name) {
4588                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4589                 } else {
4590                         $hash = $hash_base;
4591                 }
4592         }
4593         die_error(404, "No such tree") unless defined($hash);
4594         $/ = "\0";
4595         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4596                 or die_error(500, "Open git-ls-tree failed");
4597         my @entries = map { chomp; $_ } <$fd>;
4598         close $fd or die_error(404, "Reading tree failed");
4599         $/ = "\n";
4600
4601         my $refs = git_get_references();
4602         my $ref = format_ref_marker($refs, $hash_base);
4603         git_header_html();
4604         my $basedir = '';
4605         my ($have_blame) = gitweb_check_feature('blame');
4606         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4607                 my @views_nav = ();
4608                 if (defined $file_name) {
4609                         push @views_nav,
4610                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4611                                         "history"),
4612                                 $cgi->a({-href => href(action=>"tree",
4613                                                        hash_base=>"HEAD", file_name=>$file_name)},
4614                                         "HEAD"),
4615                 }
4616                 my $snapshot_links = format_snapshot_links($hash);
4617                 if (defined $snapshot_links) {
4618                         # FIXME: Should be available when we have no hash base as well.
4619                         push @views_nav, $snapshot_links;
4620                 }
4621                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4622                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4623         } else {
4624                 undef $hash_base;
4625                 print "<div class=\"page_nav\">\n";
4626                 print "<br/><br/></div>\n";
4627                 print "<div class=\"title\">$hash</div>\n";
4628         }
4629         if (defined $file_name) {
4630                 $basedir = $file_name;
4631                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4632                         $basedir .= '/';
4633                 }
4634                 git_print_page_path($file_name, 'tree', $hash_base);
4635         }
4636         print "<div class=\"page_body\">\n";
4637         print "<table class=\"tree\">\n";
4638         my $alternate = 1;
4639         # '..' (top directory) link if possible
4640         if (defined $hash_base &&
4641             defined $file_name && $file_name =~ m![^/]+$!) {
4642                 if ($alternate) {
4643                         print "<tr class=\"dark\">\n";
4644                 } else {
4645                         print "<tr class=\"light\">\n";
4646                 }
4647                 $alternate ^= 1;
4648
4649                 my $up = $file_name;
4650                 $up =~ s!/?[^/]+$!!;
4651                 undef $up unless $up;
4652                 # based on git_print_tree_entry
4653                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4654                 print '<td class="list">';
4655                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4656                                              file_name=>$up)},
4657                               "..");
4658                 print "</td>\n";
4659                 print "<td class=\"link\"></td>\n";
4660
4661                 print "</tr>\n";
4662         }
4663         foreach my $line (@entries) {
4664                 my %t = parse_ls_tree_line($line, -z => 1);
4665
4666                 if ($alternate) {
4667                         print "<tr class=\"dark\">\n";
4668                 } else {
4669                         print "<tr class=\"light\">\n";
4670                 }
4671                 $alternate ^= 1;
4672
4673                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4674
4675                 print "</tr>\n";
4676         }
4677         print "</table>\n" .
4678               "</div>";
4679         git_footer_html();
4680 }
4681
4682 sub git_snapshot {
4683         my @supported_fmts = gitweb_check_feature('snapshot');
4684         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4685
4686         my $format = $cgi->param('sf');
4687         if (!@supported_fmts) {
4688                 die_error(403, "Snapshots not allowed");
4689         }
4690         # default to first supported snapshot format
4691         $format ||= $supported_fmts[0];
4692         if ($format !~ m/^[a-z0-9]+$/) {
4693                 die_error(400, "Invalid snapshot format parameter");
4694         } elsif (!exists($known_snapshot_formats{$format})) {
4695                 die_error(400, "Unknown snapshot format");
4696         } elsif (!grep($_ eq $format, @supported_fmts)) {
4697                 die_error(403, "Unsupported snapshot format");
4698         }
4699
4700         if (!defined $hash) {
4701                 $hash = git_get_head_hash($project);
4702         }
4703
4704         my $name = $project;
4705         $name =~ s,([^/])/*\.git$,$1,;
4706         $name = basename($name);
4707         my $filename = to_utf8($name);
4708         $name =~ s/\047/\047\\\047\047/g;
4709         my $cmd;
4710         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4711         $cmd = quote_command(
4712                 git_cmd(), 'archive',
4713                 "--format=$known_snapshot_formats{$format}{'format'}",
4714                 "--prefix=$name/", $hash);
4715         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4716                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4717         }
4718
4719         print $cgi->header(
4720                 -type => $known_snapshot_formats{$format}{'type'},
4721                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4722                 -status => '200 OK');
4723
4724         open my $fd, "-|", $cmd
4725                 or die_error(500, "Execute git-archive failed");
4726         binmode STDOUT, ':raw';
4727         print <$fd>;
4728         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4729         close $fd;
4730 }
4731
4732 sub git_log {
4733         my $head = git_get_head_hash($project);
4734         if (!defined $hash) {
4735                 $hash = $head;
4736         }
4737         if (!defined $page) {
4738                 $page = 0;
4739         }
4740         my $refs = git_get_references();
4741
4742         my @commitlist = parse_commits($hash, 101, (100 * $page));
4743
4744         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4745
4746         git_header_html();
4747         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4748
4749         if (!@commitlist) {
4750                 my %co = parse_commit($hash);
4751
4752                 git_print_header_div('summary', $project);
4753                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4754         }
4755         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4756         for (my $i = 0; $i <= $to; $i++) {
4757                 my %co = %{$commitlist[$i]};
4758                 next if !%co;
4759                 my $commit = $co{'id'};
4760                 my $ref = format_ref_marker($refs, $commit);
4761                 my %ad = parse_date($co{'author_epoch'});
4762                 git_print_header_div('commit',
4763                                "<span class=\"age\">$co{'age_string'}</span>" .
4764                                esc_html($co{'title'}) . $ref,
4765                                $commit);
4766                 print "<div class=\"title_text\">\n" .
4767                       "<div class=\"log_link\">\n" .
4768                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4769                       " | " .
4770                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4771                       " | " .
4772                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4773                       "<br/>\n" .
4774                       "</div>\n" .
4775                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4776                       "</div>\n";
4777
4778                 print "<div class=\"log_body\">\n";
4779                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4780                 print "</div>\n";
4781         }
4782         if ($#commitlist >= 100) {
4783                 print "<div class=\"page_nav\">\n";
4784                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4785                                -accesskey => "n", -title => "Alt-n"}, "next");
4786                 print "</div>\n";
4787         }
4788         git_footer_html();
4789 }
4790
4791 sub git_commit {
4792         $hash ||= $hash_base || "HEAD";
4793         my %co = parse_commit($hash)
4794             or die_error(404, "Unknown commit object");
4795         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4796         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4797
4798         my $parent  = $co{'parent'};
4799         my $parents = $co{'parents'}; # listref
4800
4801         # we need to prepare $formats_nav before any parameter munging
4802         my $formats_nav;
4803         if (!defined $parent) {
4804                 # --root commitdiff
4805                 $formats_nav .= '(initial)';
4806         } elsif (@$parents == 1) {
4807                 # single parent commit
4808                 $formats_nav .=
4809                         '(parent: ' .
4810                         $cgi->a({-href => href(action=>"commit",
4811                                                hash=>$parent)},
4812                                 esc_html(substr($parent, 0, 7))) .
4813                         ')';
4814         } else {
4815                 # merge commit
4816                 $formats_nav .=
4817                         '(merge: ' .
4818                         join(' ', map {
4819                                 $cgi->a({-href => href(action=>"commit",
4820                                                        hash=>$_)},
4821                                         esc_html(substr($_, 0, 7)));
4822                         } @$parents ) .
4823                         ')';
4824         }
4825
4826         if (!defined $parent) {
4827                 $parent = "--root";
4828         }
4829         my @difftree;
4830         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4831                 @diff_opts,
4832                 (@$parents <= 1 ? $parent : '-c'),
4833                 $hash, "--"
4834                 or die_error(500, "Open git-diff-tree failed");
4835         @difftree = map { chomp; $_ } <$fd>;
4836         close $fd or die_error(404, "Reading git-diff-tree failed");
4837
4838         # non-textual hash id's can be cached
4839         my $expires;
4840         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4841                 $expires = "+1d";
4842         }
4843         my $refs = git_get_references();
4844         my $ref = format_ref_marker($refs, $co{'id'});
4845
4846         git_header_html(undef, $expires);
4847         git_print_page_nav('commit', '',
4848                            $hash, $co{'tree'}, $hash,
4849                            $formats_nav);
4850
4851         if (defined $co{'parent'}) {
4852                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4853         } else {
4854                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4855         }
4856         print "<div class=\"title_text\">\n" .
4857               "<table class=\"object_header\">\n";
4858         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4859               "<tr>" .
4860               "<td></td><td> $ad{'rfc2822'}";
4861         if ($ad{'hour_local'} < 6) {
4862                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4863                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4864         } else {
4865                 printf(" (%02d:%02d %s)",
4866                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4867         }
4868         print "</td>" .
4869               "</tr>\n";
4870         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4871         print "<tr><td></td><td> $cd{'rfc2822'}" .
4872               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4873               "</td></tr>\n";
4874         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4875         print "<tr>" .
4876               "<td>tree</td>" .
4877               "<td class=\"sha1\">" .
4878               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4879                        class => "list"}, $co{'tree'}) .
4880               "</td>" .
4881               "<td class=\"link\">" .
4882               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4883                       "tree");
4884         my $snapshot_links = format_snapshot_links($hash);
4885         if (defined $snapshot_links) {
4886                 print " | " . $snapshot_links;
4887         }
4888         print "</td>" .
4889               "</tr>\n";
4890
4891         foreach my $par (@$parents) {
4892                 print "<tr>" .
4893                       "<td>parent</td>" .
4894                       "<td class=\"sha1\">" .
4895                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4896                                class => "list"}, $par) .
4897                       "</td>" .
4898                       "<td class=\"link\">" .
4899                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4900                       " | " .
4901                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4902                       "</td>" .
4903                       "</tr>\n";
4904         }
4905         print "</table>".
4906               "</div>\n";
4907
4908         print "<div class=\"page_body\">\n";
4909         git_print_log($co{'comment'});
4910         print "</div>\n";
4911
4912         git_difftree_body(\@difftree, $hash, @$parents);
4913
4914         git_footer_html();
4915 }
4916
4917 sub git_object {
4918         # object is defined by:
4919         # - hash or hash_base alone
4920         # - hash_base and file_name
4921         my $type;
4922
4923         # - hash or hash_base alone
4924         if ($hash || ($hash_base && !defined $file_name)) {
4925                 my $object_id = $hash || $hash_base;
4926
4927                 open my $fd, "-|", quote_command(
4928                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4929                         or die_error(404, "Object does not exist");
4930                 $type = <$fd>;
4931                 chomp $type;
4932                 close $fd
4933                         or die_error(404, "Object does not exist");
4934
4935         # - hash_base and file_name
4936         } elsif ($hash_base && defined $file_name) {
4937                 $file_name =~ s,/+$,,;
4938
4939                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4940                         or die_error(404, "Base object does not exist");
4941
4942                 # here errors should not hapen
4943                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4944                         or die_error(500, "Open git-ls-tree failed");
4945                 my $line = <$fd>;
4946                 close $fd;
4947
4948                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4949                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4950                         die_error(404, "File or directory for given base does not exist");
4951                 }
4952                 $type = $2;
4953                 $hash = $3;
4954         } else {
4955                 die_error(400, "Not enough information to find object");
4956         }
4957
4958         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4959                                           hash=>$hash, hash_base=>$hash_base,
4960                                           file_name=>$file_name),
4961                              -status => '302 Found');
4962 }
4963
4964 sub git_blobdiff {
4965         my $format = shift || 'html';
4966
4967         my $fd;
4968         my @difftree;
4969         my %diffinfo;
4970         my $expires;
4971
4972         # preparing $fd and %diffinfo for git_patchset_body
4973         # new style URI
4974         if (defined $hash_base && defined $hash_parent_base) {
4975                 if (defined $file_name) {
4976                         # read raw output
4977                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4978                                 $hash_parent_base, $hash_base,
4979                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4980                                 or die_error(500, "Open git-diff-tree failed");
4981                         @difftree = map { chomp; $_ } <$fd>;
4982                         close $fd
4983                                 or die_error(404, "Reading git-diff-tree failed");
4984                         @difftree
4985                                 or die_error(404, "Blob diff not found");
4986
4987                 } elsif (defined $hash &&
4988                          $hash =~ /[0-9a-fA-F]{40}/) {
4989                         # try to find filename from $hash
4990
4991                         # read filtered raw output
4992                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4993                                 $hash_parent_base, $hash_base, "--"
4994                                 or die_error(500, "Open git-diff-tree failed");
4995                         @difftree =
4996                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4997                                 # $hash == to_id
4998                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4999                                 map { chomp; $_ } <$fd>;
5000                         close $fd
5001                                 or die_error(404, "Reading git-diff-tree failed");
5002                         @difftree
5003                                 or die_error(404, "Blob diff not found");
5004
5005                 } else {
5006                         die_error(400, "Missing one of the blob diff parameters");
5007                 }
5008
5009                 if (@difftree > 1) {
5010                         die_error(400, "Ambiguous blob diff specification");
5011                 }
5012
5013                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5014                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5015                 $file_name   ||= $diffinfo{'to_file'};
5016
5017                 $hash_parent ||= $diffinfo{'from_id'};
5018                 $hash        ||= $diffinfo{'to_id'};
5019
5020                 # non-textual hash id's can be cached
5021                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5022                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5023                         $expires = '+1d';
5024                 }
5025
5026                 # open patch output
5027                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5028                         '-p', ($format eq 'html' ? "--full-index" : ()),
5029                         $hash_parent_base, $hash_base,
5030                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5031                         or die_error(500, "Open git-diff-tree failed");
5032         }
5033
5034         # old/legacy style URI
5035         if (!%diffinfo && # if new style URI failed
5036             defined $hash && defined $hash_parent) {
5037                 # fake git-diff-tree raw output
5038                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5039                 $diffinfo{'from_id'} = $hash_parent;
5040                 $diffinfo{'to_id'}   = $hash;
5041                 if (defined $file_name) {
5042                         if (defined $file_parent) {
5043                                 $diffinfo{'status'} = '2';
5044                                 $diffinfo{'from_file'} = $file_parent;
5045                                 $diffinfo{'to_file'}   = $file_name;
5046                         } else { # assume not renamed
5047                                 $diffinfo{'status'} = '1';
5048                                 $diffinfo{'from_file'} = $file_name;
5049                                 $diffinfo{'to_file'}   = $file_name;
5050                         }
5051                 } else { # no filename given
5052                         $diffinfo{'status'} = '2';
5053                         $diffinfo{'from_file'} = $hash_parent;
5054                         $diffinfo{'to_file'}   = $hash;
5055                 }
5056
5057                 # non-textual hash id's can be cached
5058                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5059                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5060                         $expires = '+1d';
5061                 }
5062
5063                 # open patch output
5064                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5065                         '-p', ($format eq 'html' ? "--full-index" : ()),
5066                         $hash_parent, $hash, "--"
5067                         or die_error(500, "Open git-diff failed");
5068         } else  {
5069                 die_error(400, "Missing one of the blob diff parameters")
5070                         unless %diffinfo;
5071         }
5072
5073         # header
5074         if ($format eq 'html') {
5075                 my $formats_nav =
5076                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5077                                 "raw");
5078                 git_header_html(undef, $expires);
5079                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5080                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5081                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5082                 } else {
5083                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5084                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5085                 }
5086                 if (defined $file_name) {
5087                         git_print_page_path($file_name, "blob", $hash_base);
5088                 } else {
5089                         print "<div class=\"page_path\"></div>\n";
5090                 }
5091
5092         } elsif ($format eq 'plain') {
5093                 print $cgi->header(
5094                         -type => 'text/plain',
5095                         -charset => 'utf-8',
5096                         -expires => $expires,
5097                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5098
5099                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5100
5101         } else {
5102                 die_error(400, "Unknown blobdiff format");
5103         }
5104
5105         # patch
5106         if ($format eq 'html') {
5107                 print "<div class=\"page_body\">\n";
5108
5109                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5110                 close $fd;
5111
5112                 print "</div>\n"; # class="page_body"
5113                 git_footer_html();
5114
5115         } else {
5116                 while (my $line = <$fd>) {
5117                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5118                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5119
5120                         print $line;
5121
5122                         last if $line =~ m!^\+\+\+!;
5123                 }
5124                 local $/ = undef;
5125                 print <$fd>;
5126                 close $fd;
5127         }
5128 }
5129
5130 sub git_blobdiff_plain {
5131         git_blobdiff('plain');
5132 }
5133
5134 sub git_commitdiff {
5135         my $format = shift || 'html';
5136         $hash ||= $hash_base || "HEAD";
5137         my %co = parse_commit($hash)
5138             or die_error(404, "Unknown commit object");
5139
5140         # choose format for commitdiff for merge
5141         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5142                 $hash_parent = '--cc';
5143         }
5144         # we need to prepare $formats_nav before almost any parameter munging
5145         my $formats_nav;
5146         if ($format eq 'html') {
5147                 $formats_nav =
5148                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5149                                 "raw");
5150
5151                 if (defined $hash_parent &&
5152                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5153                         # commitdiff with two commits given
5154                         my $hash_parent_short = $hash_parent;
5155                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5156                                 $hash_parent_short = substr($hash_parent, 0, 7);
5157                         }
5158                         $formats_nav .=
5159                                 ' (from';
5160                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5161                                 if ($co{'parents'}[$i] eq $hash_parent) {
5162                                         $formats_nav .= ' parent ' . ($i+1);
5163                                         last;
5164                                 }
5165                         }
5166                         $formats_nav .= ': ' .
5167                                 $cgi->a({-href => href(action=>"commitdiff",
5168                                                        hash=>$hash_parent)},
5169                                         esc_html($hash_parent_short)) .
5170                                 ')';
5171                 } elsif (!$co{'parent'}) {
5172                         # --root commitdiff
5173                         $formats_nav .= ' (initial)';
5174                 } elsif (scalar @{$co{'parents'}} == 1) {
5175                         # single parent commit
5176                         $formats_nav .=
5177                                 ' (parent: ' .
5178                                 $cgi->a({-href => href(action=>"commitdiff",
5179                                                        hash=>$co{'parent'})},
5180                                         esc_html(substr($co{'parent'}, 0, 7))) .
5181                                 ')';
5182                 } else {
5183                         # merge commit
5184                         if ($hash_parent eq '--cc') {
5185                                 $formats_nav .= ' | ' .
5186                                         $cgi->a({-href => href(action=>"commitdiff",
5187                                                                hash=>$hash, hash_parent=>'-c')},
5188                                                 'combined');
5189                         } else { # $hash_parent eq '-c'
5190                                 $formats_nav .= ' | ' .
5191                                         $cgi->a({-href => href(action=>"commitdiff",
5192                                                                hash=>$hash, hash_parent=>'--cc')},
5193                                                 'compact');
5194                         }
5195                         $formats_nav .=
5196                                 ' (merge: ' .
5197                                 join(' ', map {
5198                                         $cgi->a({-href => href(action=>"commitdiff",
5199                                                                hash=>$_)},
5200                                                 esc_html(substr($_, 0, 7)));
5201                                 } @{$co{'parents'}} ) .
5202                                 ')';
5203                 }
5204         }
5205
5206         my $hash_parent_param = $hash_parent;
5207         if (!defined $hash_parent_param) {
5208                 # --cc for multiple parents, --root for parentless
5209                 $hash_parent_param =
5210                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5211         }
5212
5213         # read commitdiff
5214         my $fd;
5215         my @difftree;
5216         if ($format eq 'html') {
5217                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5218                         "--no-commit-id", "--patch-with-raw", "--full-index",
5219                         $hash_parent_param, $hash, "--"
5220                         or die_error(500, "Open git-diff-tree failed");
5221
5222                 while (my $line = <$fd>) {
5223                         chomp $line;
5224                         # empty line ends raw part of diff-tree output
5225                         last unless $line;
5226                         push @difftree, scalar parse_difftree_raw_line($line);
5227                 }
5228
5229         } elsif ($format eq 'plain') {
5230                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5231                         '-p', $hash_parent_param, $hash, "--"
5232                         or die_error(500, "Open git-diff-tree failed");
5233
5234         } else {
5235                 die_error(400, "Unknown commitdiff format");
5236         }
5237
5238         # non-textual hash id's can be cached
5239         my $expires;
5240         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5241                 $expires = "+1d";
5242         }
5243
5244         # write commit message
5245         if ($format eq 'html') {
5246                 my $refs = git_get_references();
5247                 my $ref = format_ref_marker($refs, $co{'id'});
5248
5249                 git_header_html(undef, $expires);
5250                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5251                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5252                 git_print_authorship(\%co);
5253                 print "<div class=\"page_body\">\n";
5254                 if (@{$co{'comment'}} > 1) {
5255                         print "<div class=\"log\">\n";
5256                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5257                         print "</div>\n"; # class="log"
5258                 }
5259
5260         } elsif ($format eq 'plain') {
5261                 my $refs = git_get_references("tags");
5262                 my $tagname = git_get_rev_name_tags($hash);
5263                 my $filename = basename($project) . "-$hash.patch";
5264
5265                 print $cgi->header(
5266                         -type => 'text/plain',
5267                         -charset => 'utf-8',
5268                         -expires => $expires,
5269                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5270                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5271                 print "From: " . to_utf8($co{'author'}) . "\n";
5272                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5273                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5274
5275                 print "X-Git-Tag: $tagname\n" if $tagname;
5276                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5277
5278                 foreach my $line (@{$co{'comment'}}) {
5279                         print to_utf8($line) . "\n";
5280                 }
5281                 print "---\n\n";
5282         }
5283
5284         # write patch
5285         if ($format eq 'html') {
5286                 my $use_parents = !defined $hash_parent ||
5287                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5288                 git_difftree_body(\@difftree, $hash,
5289                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5290                 print "<br/>\n";
5291
5292                 git_patchset_body($fd, \@difftree, $hash,
5293                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5294                 close $fd;
5295                 print "</div>\n"; # class="page_body"
5296                 git_footer_html();
5297
5298         } elsif ($format eq 'plain') {
5299                 local $/ = undef;
5300                 print <$fd>;
5301                 close $fd
5302                         or print "Reading git-diff-tree failed\n";
5303         }
5304 }
5305
5306 sub git_commitdiff_plain {
5307         git_commitdiff('plain');
5308 }
5309
5310 sub git_history {
5311         if (!defined $hash_base) {
5312                 $hash_base = git_get_head_hash($project);
5313         }
5314         if (!defined $page) {
5315                 $page = 0;
5316         }
5317         my $ftype;
5318         my %co = parse_commit($hash_base)
5319             or die_error(404, "Unknown commit object");
5320
5321         my $refs = git_get_references();
5322         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5323
5324         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5325                                        $file_name, "--full-history")
5326             or die_error(404, "No such file or directory on given branch");
5327
5328         if (!defined $hash && defined $file_name) {
5329                 # some commits could have deleted file in question,
5330                 # and not have it in tree, but one of them has to have it
5331                 for (my $i = 0; $i <= @commitlist; $i++) {
5332                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5333                         last if defined $hash;
5334                 }
5335         }
5336         if (defined $hash) {
5337                 $ftype = git_get_type($hash);
5338         }
5339         if (!defined $ftype) {
5340                 die_error(500, "Unknown type of object");
5341         }
5342
5343         my $paging_nav = '';
5344         if ($page > 0) {
5345                 $paging_nav .=
5346                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5347                                                file_name=>$file_name)},
5348                                 "first");
5349                 $paging_nav .= " &sdot; " .
5350                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5351                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5352         } else {
5353                 $paging_nav .= "first";
5354                 $paging_nav .= " &sdot; prev";
5355         }
5356         my $next_link = '';
5357         if ($#commitlist >= 100) {
5358                 $next_link =
5359                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5360                                  -accesskey => "n", -title => "Alt-n"}, "next");
5361                 $paging_nav .= " &sdot; $next_link";
5362         } else {
5363                 $paging_nav .= " &sdot; next";
5364         }
5365
5366         git_header_html();
5367         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5368         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5369         git_print_page_path($file_name, $ftype, $hash_base);
5370
5371         git_history_body(\@commitlist, 0, 99,
5372                          $refs, $hash_base, $ftype, $next_link);
5373
5374         git_footer_html();
5375 }
5376
5377 sub git_search {
5378         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5379         if (!defined $searchtext) {
5380                 die_error(400, "Text field is empty");
5381         }
5382         if (!defined $hash) {
5383                 $hash = git_get_head_hash($project);
5384         }
5385         my %co = parse_commit($hash);
5386         if (!%co) {
5387                 die_error(404, "Unknown commit object");
5388         }
5389         if (!defined $page) {
5390                 $page = 0;
5391         }
5392
5393         $searchtype ||= 'commit';
5394         if ($searchtype eq 'pickaxe') {
5395                 # pickaxe may take all resources of your box and run for several minutes
5396                 # with every query - so decide by yourself how public you make this feature
5397                 gitweb_check_feature('pickaxe')
5398                     or die_error(403, "Pickaxe is disabled");
5399         }
5400         if ($searchtype eq 'grep') {
5401                 gitweb_check_feature('grep')
5402                     or die_error(403, "Grep is disabled");
5403         }
5404
5405         git_header_html();
5406
5407         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5408                 my $greptype;
5409                 if ($searchtype eq 'commit') {
5410                         $greptype = "--grep=";
5411                 } elsif ($searchtype eq 'author') {
5412                         $greptype = "--author=";
5413                 } elsif ($searchtype eq 'committer') {
5414                         $greptype = "--committer=";
5415                 }
5416                 $greptype .= $searchtext;
5417                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5418                                                $greptype, '--regexp-ignore-case',
5419                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5420
5421                 my $paging_nav = '';
5422                 if ($page > 0) {
5423                         $paging_nav .=
5424                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5425                                                        searchtext=>$searchtext,
5426                                                        searchtype=>$searchtype)},
5427                                         "first");
5428                         $paging_nav .= " &sdot; " .
5429                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5430                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5431                 } else {
5432                         $paging_nav .= "first";
5433                         $paging_nav .= " &sdot; prev";
5434                 }
5435                 my $next_link = '';
5436                 if ($#commitlist >= 100) {
5437                         $next_link =
5438                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5439                                          -accesskey => "n", -title => "Alt-n"}, "next");
5440                         $paging_nav .= " &sdot; $next_link";
5441                 } else {
5442                         $paging_nav .= " &sdot; next";
5443                 }
5444
5445                 if ($#commitlist >= 100) {
5446                 }
5447
5448                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5449                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5450                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5451         }
5452
5453         if ($searchtype eq 'pickaxe') {
5454                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5455                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5456
5457                 print "<table class=\"pickaxe search\">\n";
5458                 my $alternate = 1;
5459                 $/ = "\n";
5460                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5461                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5462                         ($search_use_regexp ? '--pickaxe-regex' : ());
5463                 undef %co;
5464                 my @files;
5465                 while (my $line = <$fd>) {
5466                         chomp $line;
5467                         next unless $line;
5468
5469                         my %set = parse_difftree_raw_line($line);
5470                         if (defined $set{'commit'}) {
5471                                 # finish previous commit
5472                                 if (%co) {
5473                                         print "</td>\n" .
5474                                               "<td class=\"link\">" .
5475                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5476                                               " | " .
5477                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5478                                         print "</td>\n" .
5479                                               "</tr>\n";
5480                                 }
5481
5482                                 if ($alternate) {
5483                                         print "<tr class=\"dark\">\n";
5484                                 } else {
5485                                         print "<tr class=\"light\">\n";
5486                                 }
5487                                 $alternate ^= 1;
5488                                 %co = parse_commit($set{'commit'});
5489                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5490                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5491                                       "<td><i>$author</i></td>\n" .
5492                                       "<td>" .
5493                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5494                                               -class => "list subject"},
5495                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5496                         } elsif (defined $set{'to_id'}) {
5497                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5498
5499                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5500                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5501                                               -class => "list"},
5502                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5503                                       "<br/>\n";
5504                         }
5505                 }
5506                 close $fd;
5507
5508                 # finish last commit (warning: repetition!)
5509                 if (%co) {
5510                         print "</td>\n" .
5511                               "<td class=\"link\">" .
5512                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5513                               " | " .
5514                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5515                         print "</td>\n" .
5516                               "</tr>\n";
5517                 }
5518
5519                 print "</table>\n";
5520         }
5521
5522         if ($searchtype eq 'grep') {
5523                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5524                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5525
5526                 print "<table class=\"grep_search\">\n";
5527                 my $alternate = 1;
5528                 my $matches = 0;
5529                 $/ = "\n";
5530                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5531                         $search_use_regexp ? ('-E', '-i') : '-F',
5532                         $searchtext, $co{'tree'};
5533                 my $lastfile = '';
5534                 while (my $line = <$fd>) {
5535                         chomp $line;
5536                         my ($file, $lno, $ltext, $binary);
5537                         last if ($matches++ > 1000);
5538                         if ($line =~ /^Binary file (.+) matches$/) {
5539                                 $file = $1;
5540                                 $binary = 1;
5541                         } else {
5542                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5543                         }
5544                         if ($file ne $lastfile) {
5545                                 $lastfile and print "</td></tr>\n";
5546                                 if ($alternate++) {
5547                                         print "<tr class=\"dark\">\n";
5548                                 } else {
5549                                         print "<tr class=\"light\">\n";
5550                                 }
5551                                 print "<td class=\"list\">".
5552                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5553                                                                file_name=>"$file"),
5554                                                 -class => "list"}, esc_path($file));
5555                                 print "</td><td>\n";
5556                                 $lastfile = $file;
5557                         }
5558                         if ($binary) {
5559                                 print "<div class=\"binary\">Binary file</div>\n";
5560                         } else {
5561                                 $ltext = untabify($ltext);
5562                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5563                                         $ltext = esc_html($1, -nbsp=>1);
5564                                         $ltext .= '<span class="match">';
5565                                         $ltext .= esc_html($2, -nbsp=>1);
5566                                         $ltext .= '</span>';
5567                                         $ltext .= esc_html($3, -nbsp=>1);
5568                                 } else {
5569                                         $ltext = esc_html($ltext, -nbsp=>1);
5570                                 }
5571                                 print "<div class=\"pre\">" .
5572                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5573                                                                file_name=>"$file").'#l'.$lno,
5574                                                 -class => "linenr"}, sprintf('%4i', $lno))
5575                                         . ' ' .  $ltext . "</div>\n";
5576                         }
5577                 }
5578                 if ($lastfile) {
5579                         print "</td></tr>\n";
5580                         if ($matches > 1000) {
5581                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5582                         }
5583                 } else {
5584                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5585                 }
5586                 close $fd;
5587
5588                 print "</table>\n";
5589         }
5590         git_footer_html();
5591 }
5592
5593 sub git_search_help {
5594         git_header_html();
5595         git_print_page_nav('','', $hash,$hash,$hash);
5596         print <<EOT;
5597 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5598 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5599 the pattern entered is recognized as the POSIX extended
5600 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5601 insensitive).</p>
5602 <dl>
5603 <dt><b>commit</b></dt>
5604 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5605 EOT
5606         my ($have_grep) = gitweb_check_feature('grep');
5607         if ($have_grep) {
5608                 print <<EOT;
5609 <dt><b>grep</b></dt>
5610 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5611     a different one) are searched for the given pattern. On large trees, this search can take
5612 a while and put some strain on the server, so please use it with some consideration. Note that
5613 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5614 case-sensitive.</dd>
5615 EOT
5616         }
5617         print <<EOT;
5618 <dt><b>author</b></dt>
5619 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5620 <dt><b>committer</b></dt>
5621 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5622 EOT
5623         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5624         if ($have_pickaxe) {
5625                 print <<EOT;
5626 <dt><b>pickaxe</b></dt>
5627 <dd>All commits that caused the string to appear or disappear from any file (changes that
5628 added, removed or "modified" the string) will be listed. This search can take a while and
5629 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5630 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5631 EOT
5632         }
5633         print "</dl>\n";
5634         git_footer_html();
5635 }
5636
5637 sub git_shortlog {
5638         my $head = git_get_head_hash($project);
5639         if (!defined $hash) {
5640                 $hash = $head;
5641         }
5642         if (!defined $page) {
5643                 $page = 0;
5644         }
5645         my $refs = git_get_references();
5646
5647         my $commit_hash = $hash;
5648         if (defined $hash_parent) {
5649                 $commit_hash = "$hash_parent..$hash";
5650         }
5651         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5652
5653         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5654         my $next_link = '';
5655         if ($#commitlist >= 100) {
5656                 $next_link =
5657                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5658                                  -accesskey => "n", -title => "Alt-n"}, "next");
5659         }
5660
5661         git_header_html();
5662         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5663         git_print_header_div('summary', $project);
5664
5665         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5666
5667         git_footer_html();
5668 }
5669
5670 ## ......................................................................
5671 ## feeds (RSS, Atom; OPML)
5672
5673 sub git_feed {
5674         my $format = shift || 'atom';
5675         my ($have_blame) = gitweb_check_feature('blame');
5676
5677         # Atom: http://www.atomenabled.org/developers/syndication/
5678         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5679         if ($format ne 'rss' && $format ne 'atom') {
5680                 die_error(400, "Unknown web feed format");
5681         }
5682
5683         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5684         my $head = $hash || 'HEAD';
5685         my @commitlist = parse_commits($head, 150, 0, $file_name);
5686
5687         my %latest_commit;
5688         my %latest_date;
5689         my $content_type = "application/$format+xml";
5690         if (defined $cgi->http('HTTP_ACCEPT') &&
5691                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5692                 # browser (feed reader) prefers text/xml
5693                 $content_type = 'text/xml';
5694         }
5695         if (defined($commitlist[0])) {
5696                 %latest_commit = %{$commitlist[0]};
5697                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5698                 print $cgi->header(
5699                         -type => $content_type,
5700                         -charset => 'utf-8',
5701                         -last_modified => $latest_date{'rfc2822'});
5702         } else {
5703                 print $cgi->header(
5704                         -type => $content_type,
5705                         -charset => 'utf-8');
5706         }
5707
5708         # Optimization: skip generating the body if client asks only
5709         # for Last-Modified date.
5710         return if ($cgi->request_method() eq 'HEAD');
5711
5712         # header variables
5713         my $title = "$site_name - $project/$action";
5714         my $feed_type = 'log';
5715         if (defined $hash) {
5716                 $title .= " - '$hash'";
5717                 $feed_type = 'branch log';
5718                 if (defined $file_name) {
5719                         $title .= " :: $file_name";
5720                         $feed_type = 'history';
5721                 }
5722         } elsif (defined $file_name) {
5723                 $title .= " - $file_name";
5724                 $feed_type = 'history';
5725         }
5726         $title .= " $feed_type";
5727         my $descr = git_get_project_description($project);
5728         if (defined $descr) {
5729                 $descr = esc_html($descr);
5730         } else {
5731                 $descr = "$project " .
5732                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5733                          " feed";
5734         }
5735         my $owner = git_get_project_owner($project);
5736         $owner = esc_html($owner);
5737
5738         #header
5739         my $alt_url;
5740         if (defined $file_name) {
5741                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5742         } elsif (defined $hash) {
5743                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5744         } else {
5745                 $alt_url = href(-full=>1, action=>"summary");
5746         }
5747         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5748         if ($format eq 'rss') {
5749                 print <<XML;
5750 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5751 <channel>
5752 XML
5753                 print "<title>$title</title>\n" .
5754                       "<link>$alt_url</link>\n" .
5755                       "<description>$descr</description>\n" .
5756                       "<language>en</language>\n";
5757         } elsif ($format eq 'atom') {
5758                 print <<XML;
5759 <feed xmlns="http://www.w3.org/2005/Atom">
5760 XML
5761                 print "<title>$title</title>\n" .
5762                       "<subtitle>$descr</subtitle>\n" .
5763                       '<link rel="alternate" type="text/html" href="' .
5764                       $alt_url . '" />' . "\n" .
5765                       '<link rel="self" type="' . $content_type . '" href="' .
5766                       $cgi->self_url() . '" />' . "\n" .
5767                       "<id>" . href(-full=>1) . "</id>\n" .
5768                       # use project owner for feed author
5769                       "<author><name>$owner</name></author>\n";
5770                 if (defined $favicon) {
5771                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5772                 }
5773                 if (defined $logo_url) {
5774                         # not twice as wide as tall: 72 x 27 pixels
5775                         print "<logo>" . esc_url($logo) . "</logo>\n";
5776                 }
5777                 if (! %latest_date) {
5778                         # dummy date to keep the feed valid until commits trickle in:
5779                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5780                 } else {
5781                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5782                 }
5783         }
5784
5785         # contents
5786         for (my $i = 0; $i <= $#commitlist; $i++) {
5787                 my %co = %{$commitlist[$i]};
5788                 my $commit = $co{'id'};
5789                 # we read 150, we always show 30 and the ones more recent than 48 hours
5790                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5791                         last;
5792                 }
5793                 my %cd = parse_date($co{'author_epoch'});
5794
5795                 # get list of changed files
5796                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5797                         $co{'parent'} || "--root",
5798                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5799                         or next;
5800                 my @difftree = map { chomp; $_ } <$fd>;
5801                 close $fd
5802                         or next;
5803
5804                 # print element (entry, item)
5805                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5806                 if ($format eq 'rss') {
5807                         print "<item>\n" .
5808                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5809                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5810                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5811                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5812                               "<link>$co_url</link>\n" .
5813                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5814                               "<content:encoded>" .
5815                               "<![CDATA[\n";
5816                 } elsif ($format eq 'atom') {
5817                         print "<entry>\n" .
5818                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5819                               "<updated>$cd{'iso-8601'}</updated>\n" .
5820                               "<author>\n" .
5821                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5822                         if ($co{'author_email'}) {
5823                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5824                         }
5825                         print "</author>\n" .
5826                               # use committer for contributor
5827                               "<contributor>\n" .
5828                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5829                         if ($co{'committer_email'}) {
5830                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5831                         }
5832                         print "</contributor>\n" .
5833                               "<published>$cd{'iso-8601'}</published>\n" .
5834                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5835                               "<id>$co_url</id>\n" .
5836                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5837                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5838                 }
5839                 my $comment = $co{'comment'};
5840                 print "<pre>\n";
5841                 foreach my $line (@$comment) {
5842                         $line = esc_html($line);
5843                         print "$line\n";
5844                 }
5845                 print "</pre><ul>\n";
5846                 foreach my $difftree_line (@difftree) {
5847                         my %difftree = parse_difftree_raw_line($difftree_line);
5848                         next if !$difftree{'from_id'};
5849
5850                         my $file = $difftree{'file'} || $difftree{'to_file'};
5851
5852                         print "<li>" .
5853                               "[" .
5854                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5855                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5856                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5857                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5858                                       -title => "diff"}, 'D');
5859                         if ($have_blame) {
5860                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5861                                                              file_name=>$file, hash_base=>$commit),
5862                                               -title => "blame"}, 'B');
5863                         }
5864                         # if this is not a feed of a file history
5865                         if (!defined $file_name || $file_name ne $file) {
5866                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5867                                                              file_name=>$file, hash=>$commit),
5868                                               -title => "history"}, 'H');
5869                         }
5870                         $file = esc_path($file);
5871                         print "] ".
5872                               "$file</li>\n";
5873                 }
5874                 if ($format eq 'rss') {
5875                         print "</ul>]]>\n" .
5876                               "</content:encoded>\n" .
5877                               "</item>\n";
5878                 } elsif ($format eq 'atom') {
5879                         print "</ul>\n</div>\n" .
5880                               "</content>\n" .
5881                               "</entry>\n";
5882                 }
5883         }
5884
5885         # end of feed
5886         if ($format eq 'rss') {
5887                 print "</channel>\n</rss>\n";
5888         }       elsif ($format eq 'atom') {
5889                 print "</feed>\n";
5890         }
5891 }
5892
5893 sub git_rss {
5894         git_feed('rss');
5895 }
5896
5897 sub git_atom {
5898         git_feed('atom');
5899 }
5900
5901 sub git_opml {
5902         my @list = git_get_projects_list();
5903
5904         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5905         print <<XML;
5906 <?xml version="1.0" encoding="utf-8"?>
5907 <opml version="1.0">
5908 <head>
5909   <title>$site_name OPML Export</title>
5910 </head>
5911 <body>
5912 <outline text="git RSS feeds">
5913 XML
5914
5915         foreach my $pr (@list) {
5916                 my %proj = %$pr;
5917                 my $head = git_get_head_hash($proj{'path'});
5918                 if (!defined $head) {
5919                         next;
5920                 }
5921                 $git_dir = "$projectroot/$proj{'path'}";
5922                 my %co = parse_commit($head);
5923                 if (!%co) {
5924                         next;
5925                 }
5926
5927                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5928                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5929                 my $html = "$my_url?p=$proj{'path'};a=summary";
5930                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5931         }
5932         print <<XML;
5933 </outline>
5934 </body>
5935 </opml>
5936 XML
5937 }