gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # 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 # URI of GIT logo (72x27 size)
  72 our $logo = "++GITWEB_LOGO++";
  73 # URI of GIT favicon, assumed to be image/png type
  74 our $favicon = "++GITWEB_FAVICON++";
  75
  76 # URI and label (title) of GIT logo link
  77 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  78 #our $logo_label = "git documentation";
  79 our $logo_url = "http://git.or.cz/";
  80 our $logo_label = "git homepage";
  81
  82 # source of projects list
  83 our $projects_list = "++GITWEB_LIST++";
  84
  85 # the width (in characters) of the projects list "Description" column
  86 our $projects_list_description_width = 25;
  87
  88 # default order of projects list
  89 # valid values are none, project, descr, owner, and age
  90 our $default_projects_order = "project";
  91
  92 # show repository only if this file exists
  93 # (only effective if this variable evaluates to true)
  94 our $export_ok = "++GITWEB_EXPORT_OK++";
  95
  96 # only allow viewing of repositories also shown on the overview page
  97 our $strict_export = "++GITWEB_STRICT_EXPORT++";
  98
  99 # list of git base URLs used for URL to where fetch project from,
 100 # i.e. full URL is "$git_base_url/$project"
 101 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 102
 103 # default blob_plain mimetype and default charset for text/plain blob
 104 our $default_blob_plain_mimetype = 'text/plain';
 105 our $default_text_plain_charset  = undef;
 106
 107 # file to use for guessing MIME types before trying /etc/mime.types
 108 # (relative to the current git repository)
 109 our $mimetypes_file = undef;
 110
 111 # assume this charset if line contains non-UTF-8 characters;
 112 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 113 # for which encoding all byte sequences are valid, for example
 114 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 115 # could be even 'utf-8' for the old behavior)
 116 our $fallback_encoding = 'latin1';
 117
 118 # rename detection options for git-diff and git-diff-tree
 119 # - default is '-M', with the cost proportional to
 120 #   (number of removed files) * (number of new files).
 121 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 122 #   (number of changed files + number of removed files) * (number of new files)
 123 # - even more costly is '-C', '--find-copies-harder' with cost
 124 #   (number of files in the original tree) * (number of new files)
 125 # - one might want to include '-B' option, e.g. '-B', '-M'
 126 our @diff_opts = ('-M'); # taken from git_commit
 127
 128 # information about snapshot formats that gitweb is capable of serving
 129 our %known_snapshot_formats = (
 130         # name => {
 131         #       'display' => display name,
 132         #       'type' => mime type,
 133         #       'suffix' => filename suffix,
 134         #       'format' => --format for git-archive,
 135         #       'compressor' => [compressor command and arguments]
 136         #                       (array reference, optional)}
 137         #
 138         'tgz' => {
 139                 'display' => 'tar.gz',
 140                 'type' => 'application/x-gzip',
 141                 'suffix' => '.tar.gz',
 142                 'format' => 'tar',
 143                 'compressor' => ['gzip']},
 144
 145         'tbz2' => {
 146                 'display' => 'tar.bz2',
 147                 'type' => 'application/x-bzip2',
 148                 'suffix' => '.tar.bz2',
 149                 'format' => 'tar',
 150                 'compressor' => ['bzip2']},
 151
 152         'zip' => {
 153                 'display' => 'zip',
 154                 'type' => 'application/x-zip',
 155                 'suffix' => '.zip',
 156                 'format' => 'zip'},
 157 );
 158
 159 # Aliases so we understand old gitweb.snapshot values in repository
 160 # configuration.
 161 our %known_snapshot_format_aliases = (
 162         'gzip'  => 'tgz',
 163         'bzip2' => 'tbz2',
 164
 165         # backward compatibility: legacy gitweb config support
 166         'x-gzip' => undef, 'gz' => undef,
 167         'x-bzip2' => undef, 'bz2' => undef,
 168         'x-zip' => undef, '' => undef,
 169 );
 170
 171 # You define site-wide feature defaults here; override them with
 172 # $GITWEB_CONFIG as necessary.
 173 our %feature = (
 174         # feature => {
 175         #       'sub' => feature-sub (subroutine),
 176         #       'override' => allow-override (boolean),
 177         #       'default' => [ default options...] (array reference)}
 178         #
 179         # if feature is overridable (it means that allow-override has true value),
 180         # then feature-sub will be called with default options as parameters;
 181         # return value of feature-sub indicates if to enable specified feature
 182         #
 183         # if there is no 'sub' key (no feature-sub), then feature cannot be
 184         # overriden
 185         #
 186         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 187
 188         # Enable the 'blame' blob view, showing the last commit that modified
 189         # each line in the file. This can be very CPU-intensive.
 190
 191         # To enable system wide have in $GITWEB_CONFIG
 192         # $feature{'blame'}{'default'} = [1];
 193         # To have project specific config enable override in $GITWEB_CONFIG
 194         # $feature{'blame'}{'override'} = 1;
 195         # and in project config gitweb.blame = 0|1;
 196         'blame' => {
 197                 'sub' => \&feature_blame,
 198                 'override' => 0,
 199                 'default' => [0]},
 200
 201         # Enable the 'snapshot' link, providing a compressed archive of any
 202         # tree. This can potentially generate high traffic if you have large
 203         # project.
 204
 205         # Value is a list of formats defined in %known_snapshot_formats that
 206         # you wish to offer.
 207         # To disable system wide have in $GITWEB_CONFIG
 208         # $feature{'snapshot'}{'default'} = [];
 209         # To have project specific config enable override in $GITWEB_CONFIG
 210         # $feature{'snapshot'}{'override'} = 1;
 211         # and in project config, a comma-separated list of formats or "none"
 212         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 213         'snapshot' => {
 214                 'sub' => \&feature_snapshot,
 215                 'override' => 0,
 216                 'default' => ['tgz']},
 217
 218         # Enable text search, which will list the commits which match author,
 219         # committer or commit text to a given string.  Enabled by default.
 220         # Project specific override is not supported.
 221         'search' => {
 222                 'override' => 0,
 223                 'default' => [1]},
 224
 225         # Enable grep search, which will list the files in currently selected
 226         # tree containing the given string. Enabled by default. This can be
 227         # potentially CPU-intensive, of course.
 228
 229         # To enable system wide have in $GITWEB_CONFIG
 230         # $feature{'grep'}{'default'} = [1];
 231         # To have project specific config enable override in $GITWEB_CONFIG
 232         # $feature{'grep'}{'override'} = 1;
 233         # and in project config gitweb.grep = 0|1;
 234         'grep' => {
 235                 'override' => 0,
 236                 'default' => [1]},
 237
 238         # Enable the pickaxe search, which will list the commits that modified
 239         # a given string in a file. This can be practical and quite faster
 240         # alternative to 'blame', but still potentially CPU-intensive.
 241
 242         # To enable system wide have in $GITWEB_CONFIG
 243         # $feature{'pickaxe'}{'default'} = [1];
 244         # To have project specific config enable override in $GITWEB_CONFIG
 245         # $feature{'pickaxe'}{'override'} = 1;
 246         # and in project config gitweb.pickaxe = 0|1;
 247         'pickaxe' => {
 248                 'sub' => \&feature_pickaxe,
 249                 'override' => 0,
 250                 'default' => [1]},
 251
 252         # Make gitweb use an alternative format of the URLs which can be
 253         # more readable and natural-looking: project name is embedded
 254         # directly in the path and the query string contains other
 255         # auxiliary information. All gitweb installations recognize
 256         # URL in either format; this configures in which formats gitweb
 257         # generates links.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'pathinfo'}{'default'} = [1];
 261         # Project specific override is not supported.
 262
 263         # Note that you will need to change the default location of CSS,
 264         # favicon, logo and possibly other files to an absolute URL. Also,
 265         # if gitweb.cgi serves as your indexfile, you will need to force
 266         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 267         'pathinfo' => {
 268                 'override' => 0,
 269                 'default' => [0]},
 270
 271         # Make gitweb consider projects in project root subdirectories
 272         # to be forks of existing projects. Given project $projname.git,
 273         # projects matching $projname/*.git will not be shown in the main
 274         # projects list, instead a '+' mark will be added to $projname
 275         # there and a 'forks' view will be enabled for the project, listing
 276         # all the forks. If project list is taken from a file, forks have
 277         # to be listed after the main project.
 278
 279         # To enable system wide have in $GITWEB_CONFIG
 280         # $feature{'forks'}{'default'} = [1];
 281         # Project specific override is not supported.
 282         'forks' => {
 283                 'override' => 0,
 284                 'default' => [0]},
 285
 286         # Allow gitweb scan project content tags described in ctags/
 287         # of project repository, and display the popular Web 2.0-ish
 288         # "tag cloud" near the project list. Note that this is something
 289         # COMPLETELY different from the normal Git tags.
 290
 291         # gitweb by itself can show existing tags, but it does not handle
 292         # tagging itself; you need an external application for that.
 293         # For an example script, check Girocco's cgi/tagproj.cgi.
 294         # You may want to install the HTML::TagCloud Perl module to get
 295         # a pretty tag cloud instead of just a list of tags.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 299         # Project specific override is not supported.
 300         'ctags' => {
 301                 'override' => 0,
 302                 'default' => [0]},
 303 );
 304
 305 sub gitweb_check_feature {
 306         my ($name) = @_;
 307         return unless exists $feature{$name};
 308         my ($sub, $override, @defaults) = (
 309                 $feature{$name}{'sub'},
 310                 $feature{$name}{'override'},
 311                 @{$feature{$name}{'default'}});
 312         if (!$override) { return @defaults; }
 313         if (!defined $sub) {
 314                 warn "feature $name is not overrideable";
 315                 return @defaults;
 316         }
 317         return $sub->(@defaults);
 318 }
 319
 320 sub feature_blame {
 321         my ($val) = git_get_project_config('blame', '--bool');
 322
 323         if ($val eq 'true') {
 324                 return 1;
 325         } elsif ($val eq 'false') {
 326                 return 0;
 327         }
 328
 329         return $_[0];
 330 }
 331
 332 sub feature_snapshot {
 333         my (@fmts) = @_;
 334
 335         my ($val) = git_get_project_config('snapshot');
 336
 337         if ($val) {
 338                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 339         }
 340
 341         return @fmts;
 342 }
 343
 344 sub feature_grep {
 345         my ($val) = git_get_project_config('grep', '--bool');
 346
 347         if ($val eq 'true') {
 348                 return (1);
 349         } elsif ($val eq 'false') {
 350                 return (0);
 351         }
 352
 353         return ($_[0]);
 354 }
 355
 356 sub feature_pickaxe {
 357         my ($val) = git_get_project_config('pickaxe', '--bool');
 358
 359         if ($val eq 'true') {
 360                 return (1);
 361         } elsif ($val eq 'false') {
 362                 return (0);
 363         }
 364
 365         return ($_[0]);
 366 }
 367
 368 # checking HEAD file with -e is fragile if the repository was
 369 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 370 # and then pruned.
 371 sub check_head_link {
 372         my ($dir) = @_;
 373         my $headfile = "$dir/HEAD";
 374         return ((-e $headfile) ||
 375                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 376 }
 377
 378 sub check_export_ok {
 379         my ($dir) = @_;
 380         return (check_head_link($dir) &&
 381                 (!$export_ok || -e "$dir/$export_ok"));
 382 }
 383
 384 # process alternate names for backward compatibility
 385 # filter out unsupported (unknown) snapshot formats
 386 sub filter_snapshot_fmts {
 387         my @fmts = @_;
 388
 389         @fmts = map {
 390                 exists $known_snapshot_format_aliases{$_} ?
 391                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 392         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 393
 394 }
 395
 396 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 397 if (-e $GITWEB_CONFIG) {
 398         do $GITWEB_CONFIG;
 399 } else {
 400         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 401         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 402 }
 403
 404 # version of the core git binary
 405 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 406
 407 $projects_list ||= $projectroot;
 408
 409 # ======================================================================
 410 # input validation and dispatch
 411 our $action = $cgi->param('a');
 412 if (defined $action) {
 413         if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
 414                 die_error(400, "Invalid action parameter");
 415         }
 416 }
 417
 418 # parameters which are pathnames
 419 our $project = $cgi->param('p');
 420 if (defined $project) {
 421         if (!validate_pathname($project) ||
 422             !(-d "$projectroot/$project") ||
 423             !check_head_link("$projectroot/$project") ||
 424             ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
 425             ($strict_export && !project_in_list($project))) {
 426                 undef $project;
 427                 die_error(404, "No such project");
 428         }
 429 }
 430
 431 our $file_name = $cgi->param('f');
 432 if (defined $file_name) {
 433         if (!validate_pathname($file_name)) {
 434                 die_error(400, "Invalid file parameter");
 435         }
 436 }
 437
 438 our $file_parent = $cgi->param('fp');
 439 if (defined $file_parent) {
 440         if (!validate_pathname($file_parent)) {
 441                 die_error(400, "Invalid file parent parameter");
 442         }
 443 }
 444
 445 # parameters which are refnames
 446 our $hash = $cgi->param('h');
 447 if (defined $hash) {
 448         if (!validate_refname($hash)) {
 449                 die_error(400, "Invalid hash parameter");
 450         }
 451 }
 452
 453 our $hash_parent = $cgi->param('hp');
 454 if (defined $hash_parent) {
 455         if (!validate_refname($hash_parent)) {
 456                 die_error(400, "Invalid hash parent parameter");
 457         }
 458 }
 459
 460 our $hash_base = $cgi->param('hb');
 461 if (defined $hash_base) {
 462         if (!validate_refname($hash_base)) {
 463                 die_error(400, "Invalid hash base parameter");
 464         }
 465 }
 466
 467 my %allowed_options = (
 468         "--no-merges" => [ qw(rss atom log shortlog history) ],
 469 );
 470
 471 our @extra_options = $cgi->param('opt');
 472 if (defined @extra_options) {
 473         foreach my $opt (@extra_options) {
 474                 if (not exists $allowed_options{$opt}) {
 475                         die_error(400, "Invalid option parameter");
 476                 }
 477                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 478                         die_error(400, "Invalid option parameter for this action");
 479                 }
 480         }
 481 }
 482
 483 our $hash_parent_base = $cgi->param('hpb');
 484 if (defined $hash_parent_base) {
 485         if (!validate_refname($hash_parent_base)) {
 486                 die_error(400, "Invalid hash parent base parameter");
 487         }
 488 }
 489
 490 # other parameters
 491 our $page = $cgi->param('pg');
 492 if (defined $page) {
 493         if ($page =~ m/[^0-9]/) {
 494                 die_error(400, "Invalid page parameter");
 495         }
 496 }
 497
 498 our $searchtype = $cgi->param('st');
 499 if (defined $searchtype) {
 500         if ($searchtype =~ m/[^a-z]/) {
 501                 die_error(400, "Invalid searchtype parameter");
 502         }
 503 }
 504
 505 our $search_use_regexp = $cgi->param('sr');
 506
 507 our $searchtext = $cgi->param('s');
 508 our $search_regexp;
 509 if (defined $searchtext) {
 510         if (length($searchtext) < 2) {
 511                 die_error(403, "At least two characters are required for search parameter");
 512         }
 513         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 514 }
 515
 516 # now read PATH_INFO and use it as alternative to parameters
 517 sub evaluate_path_info {
 518         return if defined $project;
 519         my $path_info = $ENV{"PATH_INFO"};
 520         return if !$path_info;
 521         $path_info =~ s,^/+,,;
 522         return if !$path_info;
 523         # find which part of PATH_INFO is project
 524         $project = $path_info;
 525         $project =~ s,/+$,,;
 526         while ($project && !check_head_link("$projectroot/$project")) {
 527                 $project =~ s,/*[^/]*$,,;
 528         }
 529         # validate project
 530         $project = validate_pathname($project);
 531         if (!$project ||
 532             ($export_ok && !-e "$projectroot/$project/$export_ok") ||
 533             ($strict_export && !project_in_list($project))) {
 534                 undef $project;
 535                 return;
 536         }
 537         # do not change any parameters if an action is given using the query string
 538         return if $action;
 539         $path_info =~ s,^\Q$project\E/*,,;
 540         my ($refname, $pathname) = split(/:/, $path_info, 2);
 541         if (defined $pathname) {
 542                 # we got "project.git/branch:filename" or "project.git/branch:dir/"
 543                 # we could use git_get_type(branch:pathname), but it needs $git_dir
 544                 $pathname =~ s,^/+,,;
 545                 if (!$pathname || substr($pathname, -1) eq "/") {
 546                         $action  ||= "tree";
 547                         $pathname =~ s,/$,,;
 548                 } else {
 549                         $action  ||= "blob_plain";
 550                 }
 551                 $hash_base ||= validate_refname($refname);
 552                 $file_name ||= validate_pathname($pathname);
 553         } elsif (defined $refname) {
 554                 # we got "project.git/branch"
 555                 $action ||= "shortlog";
 556                 $hash   ||= validate_refname($refname);
 557         }
 558 }
 559 evaluate_path_info();
 560
 561 # path to the current git repository
 562 our $git_dir;
 563 $git_dir = "$projectroot/$project" if $project;
 564
 565 # dispatch
 566 my %actions = (
 567         "blame" => \&git_blame,
 568         "blobdiff" => \&git_blobdiff,
 569         "blobdiff_plain" => \&git_blobdiff_plain,
 570         "blob" => \&git_blob,
 571         "blob_plain" => \&git_blob_plain,
 572         "commitdiff" => \&git_commitdiff,
 573         "commitdiff_plain" => \&git_commitdiff_plain,
 574         "commit" => \&git_commit,
 575         "forks" => \&git_forks,
 576         "heads" => \&git_heads,
 577         "history" => \&git_history,
 578         "log" => \&git_log,
 579         "rss" => \&git_rss,
 580         "atom" => \&git_atom,
 581         "search" => \&git_search,
 582         "search_help" => \&git_search_help,
 583         "shortlog" => \&git_shortlog,
 584         "summary" => \&git_summary,
 585         "tag" => \&git_tag,
 586         "tags" => \&git_tags,
 587         "tree" => \&git_tree,
 588         "snapshot" => \&git_snapshot,
 589         "object" => \&git_object,
 590         # those below don't need $project
 591         "opml" => \&git_opml,
 592         "project_list" => \&git_project_list,
 593         "project_index" => \&git_project_index,
 594 );
 595
 596 if (!defined $action) {
 597         if (defined $hash) {
 598                 $action = git_get_type($hash);
 599         } elsif (defined $hash_base && defined $file_name) {
 600                 $action = git_get_type("$hash_base:$file_name");
 601         } elsif (defined $project) {
 602                 $action = 'summary';
 603         } else {
 604                 $action = 'project_list';
 605         }
 606 }
 607 if (!defined($actions{$action})) {
 608         die_error(400, "Unknown action");
 609 }
 610 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 611     !$project) {
 612         die_error(400, "Project needed");
 613 }
 614 $actions{$action}->();
 615 exit;
 616
 617 ## ======================================================================
 618 ## action links
 619
 620 sub href (%) {
 621         my %params = @_;
 622         # default is to use -absolute url() i.e. $my_uri
 623         my $href = $params{-full} ? $my_url : $my_uri;
 624
 625         # XXX: Warning: If you touch this, check the search form for updating,
 626         # too.
 627
 628         my @mapping = (
 629                 project => "p",
 630                 action => "a",
 631                 file_name => "f",
 632                 file_parent => "fp",
 633                 hash => "h",
 634                 hash_parent => "hp",
 635                 hash_base => "hb",
 636                 hash_parent_base => "hpb",
 637                 page => "pg",
 638                 order => "o",
 639                 searchtext => "s",
 640                 searchtype => "st",
 641                 snapshot_format => "sf",
 642                 extra_options => "opt",
 643                 search_use_regexp => "sr",
 644         );
 645         my %mapping = @mapping;
 646
 647         $params{'project'} = $project unless exists $params{'project'};
 648
 649         if ($params{-replay}) {
 650                 while (my ($name, $symbol) = each %mapping) {
 651                         if (!exists $params{$name}) {
 652                                 # to allow for multivalued params we use arrayref form
 653                                 $params{$name} = [ $cgi->param($symbol) ];
 654                         }
 655                 }
 656         }
 657
 658         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 659         if ($use_pathinfo) {
 660                 # use PATH_INFO for project name
 661                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 662                 delete $params{'project'};
 663
 664                 # Summary just uses the project path URL
 665                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 666                         delete $params{'action'};
 667                 }
 668         }
 669
 670         # now encode the parameters explicitly
 671         my @result = ();
 672         for (my $i = 0; $i < @mapping; $i += 2) {
 673                 my ($name, $symbol) = ($mapping[$i], $mapping[$i+1]);
 674                 if (defined $params{$name}) {
 675                         if (ref($params{$name}) eq "ARRAY") {
 676                                 foreach my $par (@{$params{$name}}) {
 677                                         push @result, $symbol . "=" . esc_param($par);
 678                                 }
 679                         } else {
 680                                 push @result, $symbol . "=" . esc_param($params{$name});
 681                         }
 682                 }
 683         }
 684         $href .= "?" . join(';', @result) if scalar @result;
 685
 686         return $href;
 687 }
 688
 689
 690 ## ======================================================================
 691 ## validation, quoting/unquoting and escaping
 692
 693 sub validate_pathname {
 694         my $input = shift || return undef;
 695
 696         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 697         # at the beginning, at the end, and between slashes.
 698         # also this catches doubled slashes
 699         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 700                 return undef;
 701         }
 702         # no null characters
 703         if ($input =~ m!\0!) {
 704                 return undef;
 705         }
 706         return $input;
 707 }
 708
 709 sub validate_refname {
 710         my $input = shift || return undef;
 711
 712         # textual hashes are O.K.
 713         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 714                 return $input;
 715         }
 716         # it must be correct pathname
 717         $input = validate_pathname($input)
 718                 or return undef;
 719         # restrictions on ref name according to git-check-ref-format
 720         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 721                 return undef;
 722         }
 723         return $input;
 724 }
 725
 726 # decode sequences of octets in utf8 into Perl's internal form,
 727 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 728 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 729 sub to_utf8 {
 730         my $str = shift;
 731         if (utf8::valid($str)) {
 732                 utf8::decode($str);
 733                 return $str;
 734         } else {
 735                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 736         }
 737 }
 738
 739 # quote unsafe chars, but keep the slash, even when it's not
 740 # correct, but quoted slashes look too horrible in bookmarks
 741 sub esc_param {
 742         my $str = shift;
 743         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 744         $str =~ s/\+/%2B/g;
 745         $str =~ s/ /\+/g;
 746         return $str;
 747 }
 748
 749 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 750 sub esc_url {
 751         my $str = shift;
 752         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 753         $str =~ s/\+/%2B/g;
 754         $str =~ s/ /\+/g;
 755         return $str;
 756 }
 757
 758 # replace invalid utf8 character with SUBSTITUTION sequence
 759 sub esc_html ($;%) {
 760         my $str = shift;
 761         my %opts = @_;
 762
 763         $str = to_utf8($str);
 764         $str = $cgi->escapeHTML($str);
 765         if ($opts{'-nbsp'}) {
 766                 $str =~ s/ /&nbsp;/g;
 767         }
 768         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 769         return $str;
 770 }
 771
 772 # quote control characters and escape filename to HTML
 773 sub esc_path {
 774         my $str = shift;
 775         my %opts = @_;
 776
 777         $str = to_utf8($str);
 778         $str = $cgi->escapeHTML($str);
 779         if ($opts{'-nbsp'}) {
 780                 $str =~ s/ /&nbsp;/g;
 781         }
 782         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 783         return $str;
 784 }
 785
 786 # Make control characters "printable", using character escape codes (CEC)
 787 sub quot_cec {
 788         my $cntrl = shift;
 789         my %opts = @_;
 790         my %es = ( # character escape codes, aka escape sequences
 791                 "\t" => '\t',   # tab            (HT)
 792                 "\n" => '\n',   # line feed      (LF)
 793                 "\r" => '\r',   # carrige return (CR)
 794                 "\f" => '\f',   # form feed      (FF)
 795                 "\b" => '\b',   # backspace      (BS)
 796                 "\a" => '\a',   # alarm (bell)   (BEL)
 797                 "\e" => '\e',   # escape         (ESC)
 798                 "\013" => '\v', # vertical tab   (VT)
 799                 "\000" => '\0', # nul character  (NUL)
 800         );
 801         my $chr = ( (exists $es{$cntrl})
 802                     ? $es{$cntrl}
 803                     : sprintf('\%2x', ord($cntrl)) );
 804         if ($opts{-nohtml}) {
 805                 return $chr;
 806         } else {
 807                 return "<span class=\"cntrl\">$chr</span>";
 808         }
 809 }
 810
 811 # Alternatively use unicode control pictures codepoints,
 812 # Unicode "printable representation" (PR)
 813 sub quot_upr {
 814         my $cntrl = shift;
 815         my %opts = @_;
 816
 817         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 818         if ($opts{-nohtml}) {
 819                 return $chr;
 820         } else {
 821                 return "<span class=\"cntrl\">$chr</span>";
 822         }
 823 }
 824
 825 # git may return quoted and escaped filenames
 826 sub unquote {
 827         my $str = shift;
 828
 829         sub unq {
 830                 my $seq = shift;
 831                 my %es = ( # character escape codes, aka escape sequences
 832                         't' => "\t",   # tab            (HT, TAB)
 833                         'n' => "\n",   # newline        (NL)
 834                         'r' => "\r",   # return         (CR)
 835                         'f' => "\f",   # form feed      (FF)
 836                         'b' => "\b",   # backspace      (BS)
 837                         'a' => "\a",   # alarm (bell)   (BEL)
 838                         'e' => "\e",   # escape         (ESC)
 839                         'v' => "\013", # vertical tab   (VT)
 840                 );
 841
 842                 if ($seq =~ m/^[0-7]{1,3}$/) {
 843                         # octal char sequence
 844                         return chr(oct($seq));
 845                 } elsif (exists $es{$seq}) {
 846                         # C escape sequence, aka character escape code
 847                         return $es{$seq};
 848                 }
 849                 # quoted ordinary character
 850                 return $seq;
 851         }
 852
 853         if ($str =~ m/^"(.*)"$/) {
 854                 # needs unquoting
 855                 $str = $1;
 856                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 857         }
 858         return $str;
 859 }
 860
 861 # escape tabs (convert tabs to spaces)
 862 sub untabify {
 863         my $line = shift;
 864
 865         while ((my $pos = index($line, "\t")) != -1) {
 866                 if (my $count = (8 - ($pos % 8))) {
 867                         my $spaces = ' ' x $count;
 868                         $line =~ s/\t/$spaces/;
 869                 }
 870         }
 871
 872         return $line;
 873 }
 874
 875 sub project_in_list {
 876         my $project = shift;
 877         my @list = git_get_projects_list();
 878         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 879 }
 880
 881 ## ----------------------------------------------------------------------
 882 ## HTML aware string manipulation
 883
 884 # Try to chop given string on a word boundary between position
 885 # $len and $len+$add_len. If there is no word boundary there,
 886 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 887 # (marking chopped part) would be longer than given string.
 888 sub chop_str {
 889         my $str = shift;
 890         my $len = shift;
 891         my $add_len = shift || 10;
 892         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 893
 894         # Make sure perl knows it is utf8 encoded so we don't
 895         # cut in the middle of a utf8 multibyte char.
 896         $str = to_utf8($str);
 897
 898         # allow only $len chars, but don't cut a word if it would fit in $add_len
 899         # if it doesn't fit, cut it if it's still longer than the dots we would add
 900         # remove chopped character entities entirely
 901
 902         # when chopping in the middle, distribute $len into left and right part
 903         # return early if chopping wouldn't make string shorter
 904         if ($where eq 'center') {
 905                 return $str if ($len + 5 >= length($str)); # filler is length 5
 906                 $len = int($len/2);
 907         } else {
 908                 return $str if ($len + 4 >= length($str)); # filler is length 4
 909         }
 910
 911         # regexps: ending and beginning with word part up to $add_len
 912         my $endre = qr/.{$len}\w{0,$add_len}/;
 913         my $begre = qr/\w{0,$add_len}.{$len}/;
 914
 915         if ($where eq 'left') {
 916                 $str =~ m/^(.*?)($begre)$/;
 917                 my ($lead, $body) = ($1, $2);
 918                 if (length($lead) > 4) {
 919                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
 920                         $lead = " ...";
 921                 }
 922                 return "$lead$body";
 923
 924         } elsif ($where eq 'center') {
 925                 $str =~ m/^($endre)(.*)$/;
 926                 my ($left, $str)  = ($1, $2);
 927                 $str =~ m/^(.*?)($begre)$/;
 928                 my ($mid, $right) = ($1, $2);
 929                 if (length($mid) > 5) {
 930                         $left  =~ s/&[^;]*$//;
 931                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
 932                         $mid = " ... ";
 933                 }
 934                 return "$left$mid$right";
 935
 936         } else {
 937                 $str =~ m/^($endre)(.*)$/;
 938                 my $body = $1;
 939                 my $tail = $2;
 940                 if (length($tail) > 4) {
 941                         $body =~ s/&[^;]*$//;
 942                         $tail = "... ";
 943                 }
 944                 return "$body$tail";
 945         }
 946 }
 947
 948 # takes the same arguments as chop_str, but also wraps a <span> around the
 949 # result with a title attribute if it does get chopped. Additionally, the
 950 # string is HTML-escaped.
 951 sub chop_and_escape_str {
 952         my ($str) = @_;
 953
 954         my $chopped = chop_str(@_);
 955         if ($chopped eq $str) {
 956                 return esc_html($chopped);
 957         } else {
 958                 $str =~ s/([[:cntrl:]])/?/g;
 959                 return $cgi->span({-title=>$str}, esc_html($chopped));
 960         }
 961 }
 962
 963 ## ----------------------------------------------------------------------
 964 ## functions returning short strings
 965
 966 # CSS class for given age value (in seconds)
 967 sub age_class {
 968         my $age = shift;
 969
 970         if (!defined $age) {
 971                 return "noage";
 972         } elsif ($age < 60*60*2) {
 973                 return "age0";
 974         } elsif ($age < 60*60*24*2) {
 975                 return "age1";
 976         } else {
 977                 return "age2";
 978         }
 979 }
 980
 981 # convert age in seconds to "nn units ago" string
 982 sub age_string {
 983         my $age = shift;
 984         my $age_str;
 985
 986         if ($age > 60*60*24*365*2) {
 987                 $age_str = (int $age/60/60/24/365);
 988                 $age_str .= " years ago";
 989         } elsif ($age > 60*60*24*(365/12)*2) {
 990                 $age_str = int $age/60/60/24/(365/12);
 991                 $age_str .= " months ago";
 992         } elsif ($age > 60*60*24*7*2) {
 993                 $age_str = int $age/60/60/24/7;
 994                 $age_str .= " weeks ago";
 995         } elsif ($age > 60*60*24*2) {
 996                 $age_str = int $age/60/60/24;
 997                 $age_str .= " days ago";
 998         } elsif ($age > 60*60*2) {
 999                 $age_str = int $age/60/60;
1000                 $age_str .= " hours ago";
1001         } elsif ($age > 60*2) {
1002                 $age_str = int $age/60;
1003                 $age_str .= " min ago";
1004         } elsif ($age > 2) {
1005                 $age_str = int $age;
1006                 $age_str .= " sec ago";
1007         } else {
1008                 $age_str .= " right now";
1009         }
1010         return $age_str;
1011 }
1012
1013 use constant {
1014         S_IFINVALID => 0030000,
1015         S_IFGITLINK => 0160000,
1016 };
1017
1018 # submodule/subproject, a commit object reference
1019 sub S_ISGITLINK($) {
1020         my $mode = shift;
1021
1022         return (($mode & S_IFMT) == S_IFGITLINK)
1023 }
1024
1025 # convert file mode in octal to symbolic file mode string
1026 sub mode_str {
1027         my $mode = oct shift;
1028
1029         if (S_ISGITLINK($mode)) {
1030                 return 'm---------';
1031         } elsif (S_ISDIR($mode & S_IFMT)) {
1032                 return 'drwxr-xr-x';
1033         } elsif (S_ISLNK($mode)) {
1034                 return 'lrwxrwxrwx';
1035         } elsif (S_ISREG($mode)) {
1036                 # git cares only about the executable bit
1037                 if ($mode & S_IXUSR) {
1038                         return '-rwxr-xr-x';
1039                 } else {
1040                         return '-rw-r--r--';
1041                 };
1042         } else {
1043                 return '----------';
1044         }
1045 }
1046
1047 # convert file mode in octal to file type string
1048 sub file_type {
1049         my $mode = shift;
1050
1051         if ($mode !~ m/^[0-7]+$/) {
1052                 return $mode;
1053         } else {
1054                 $mode = oct $mode;
1055         }
1056
1057         if (S_ISGITLINK($mode)) {
1058                 return "submodule";
1059         } elsif (S_ISDIR($mode & S_IFMT)) {
1060                 return "directory";
1061         } elsif (S_ISLNK($mode)) {
1062                 return "symlink";
1063         } elsif (S_ISREG($mode)) {
1064                 return "file";
1065         } else {
1066                 return "unknown";
1067         }
1068 }
1069
1070 # convert file mode in octal to file type description string
1071 sub file_type_long {
1072         my $mode = shift;
1073
1074         if ($mode !~ m/^[0-7]+$/) {
1075                 return $mode;
1076         } else {
1077                 $mode = oct $mode;
1078         }
1079
1080         if (S_ISGITLINK($mode)) {
1081                 return "submodule";
1082         } elsif (S_ISDIR($mode & S_IFMT)) {
1083                 return "directory";
1084         } elsif (S_ISLNK($mode)) {
1085                 return "symlink";
1086         } elsif (S_ISREG($mode)) {
1087                 if ($mode & S_IXUSR) {
1088                         return "executable";
1089                 } else {
1090                         return "file";
1091                 };
1092         } else {
1093                 return "unknown";
1094         }
1095 }
1096
1097
1098 ## ----------------------------------------------------------------------
1099 ## functions returning short HTML fragments, or transforming HTML fragments
1100 ## which don't belong to other sections
1101
1102 # format line of commit message.
1103 sub format_log_line_html {
1104         my $line = shift;
1105
1106         $line = esc_html($line, -nbsp=>1);
1107         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1108                 my $hash_text = $1;
1109                 my $link =
1110                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1111                                 -class => "text"}, $hash_text);
1112                 $line =~ s/$hash_text/$link/;
1113         }
1114         return $line;
1115 }
1116
1117 # format marker of refs pointing to given object
1118
1119 # the destination action is chosen based on object type and current context:
1120 # - for annotated tags, we choose the tag view unless it's the current view
1121 #   already, in which case we go to shortlog view
1122 # - for other refs, we keep the current view if we're in history, shortlog or
1123 #   log view, and select shortlog otherwise
1124 sub format_ref_marker {
1125         my ($refs, $id) = @_;
1126         my $markers = '';
1127
1128         if (defined $refs->{$id}) {
1129                 foreach my $ref (@{$refs->{$id}}) {
1130                         # this code exploits the fact that non-lightweight tags are the
1131                         # only indirect objects, and that they are the only objects for which
1132                         # we want to use tag instead of shortlog as action
1133                         my ($type, $name) = qw();
1134                         my $indirect = ($ref =~ s/\^\{\}$//);
1135                         # e.g. tags/v2.6.11 or heads/next
1136                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1137                                 $type = $1;
1138                                 $name = $2;
1139                         } else {
1140                                 $type = "ref";
1141                                 $name = $ref;
1142                         }
1143
1144                         my $class = $type;
1145                         $class .= " indirect" if $indirect;
1146
1147                         my $dest_action = "shortlog";
1148
1149                         if ($indirect) {
1150                                 $dest_action = "tag" unless $action eq "tag";
1151                         } elsif ($action =~ /^(history|(short)?log)$/) {
1152                                 $dest_action = $action;
1153                         }
1154
1155                         my $dest = "";
1156                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1157                         $dest .= $ref;
1158
1159                         my $link = $cgi->a({
1160                                 -href => href(
1161                                         action=>$dest_action,
1162                                         hash=>$dest
1163                                 )}, $name);
1164
1165                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1166                                 $link . "</span>";
1167                 }
1168         }
1169
1170         if ($markers) {
1171                 return ' <span class="refs">'. $markers . '</span>';
1172         } else {
1173                 return "";
1174         }
1175 }
1176
1177 # format, perhaps shortened and with markers, title line
1178 sub format_subject_html {
1179         my ($long, $short, $href, $extra) = @_;
1180         $extra = '' unless defined($extra);
1181
1182         if (length($short) < length($long)) {
1183                 return $cgi->a({-href => $href, -class => "list subject",
1184                                 -title => to_utf8($long)},
1185                        esc_html($short) . $extra);
1186         } else {
1187                 return $cgi->a({-href => $href, -class => "list subject"},
1188                        esc_html($long)  . $extra);
1189         }
1190 }
1191
1192 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1193 sub format_git_diff_header_line {
1194         my $line = shift;
1195         my $diffinfo = shift;
1196         my ($from, $to) = @_;
1197
1198         if ($diffinfo->{'nparents'}) {
1199                 # combined diff
1200                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1201                 if ($to->{'href'}) {
1202                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1203                                          esc_path($to->{'file'}));
1204                 } else { # file was deleted (no href)
1205                         $line .= esc_path($to->{'file'});
1206                 }
1207         } else {
1208                 # "ordinary" diff
1209                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1210                 if ($from->{'href'}) {
1211                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1212                                          'a/' . esc_path($from->{'file'}));
1213                 } else { # file was added (no href)
1214                         $line .= 'a/' . esc_path($from->{'file'});
1215                 }
1216                 $line .= ' ';
1217                 if ($to->{'href'}) {
1218                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1219                                          'b/' . esc_path($to->{'file'}));
1220                 } else { # file was deleted
1221                         $line .= 'b/' . esc_path($to->{'file'});
1222                 }
1223         }
1224
1225         return "<div class=\"diff header\">$line</div>\n";
1226 }
1227
1228 # format extended diff header line, before patch itself
1229 sub format_extended_diff_header_line {
1230         my $line = shift;
1231         my $diffinfo = shift;
1232         my ($from, $to) = @_;
1233
1234         # match <path>
1235         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1236                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1237                                        esc_path($from->{'file'}));
1238         }
1239         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1240                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1241                                  esc_path($to->{'file'}));
1242         }
1243         # match single <mode>
1244         if ($line =~ m/\s(\d{6})$/) {
1245                 $line .= '<span class="info"> (' .
1246                          file_type_long($1) .
1247                          ')</span>';
1248         }
1249         # match <hash>
1250         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1251                 # can match only for combined diff
1252                 $line = 'index ';
1253                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1254                         if ($from->{'href'}[$i]) {
1255                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1256                                                   -class=>"hash"},
1257                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1258                         } else {
1259                                 $line .= '0' x 7;
1260                         }
1261                         # separator
1262                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1263                 }
1264                 $line .= '..';
1265                 if ($to->{'href'}) {
1266                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1267                                          substr($diffinfo->{'to_id'},0,7));
1268                 } else {
1269                         $line .= '0' x 7;
1270                 }
1271
1272         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1273                 # can match only for ordinary diff
1274                 my ($from_link, $to_link);
1275                 if ($from->{'href'}) {
1276                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1277                                              substr($diffinfo->{'from_id'},0,7));
1278                 } else {
1279                         $from_link = '0' x 7;
1280                 }
1281                 if ($to->{'href'}) {
1282                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1283                                            substr($diffinfo->{'to_id'},0,7));
1284                 } else {
1285                         $to_link = '0' x 7;
1286                 }
1287                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1288                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1289         }
1290
1291         return $line . "<br/>\n";
1292 }
1293
1294 # format from-file/to-file diff header
1295 sub format_diff_from_to_header {
1296         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1297         my $line;
1298         my $result = '';
1299
1300         $line = $from_line;
1301         #assert($line =~ m/^---/) if DEBUG;
1302         # no extra formatting for "^--- /dev/null"
1303         if (! $diffinfo->{'nparents'}) {
1304                 # ordinary (single parent) diff
1305                 if ($line =~ m!^--- "?a/!) {
1306                         if ($from->{'href'}) {
1307                                 $line = '--- a/' .
1308                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1309                                                 esc_path($from->{'file'}));
1310                         } else {
1311                                 $line = '--- a/' .
1312                                         esc_path($from->{'file'});
1313                         }
1314                 }
1315                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1316
1317         } else {
1318                 # combined diff (merge commit)
1319                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1320                         if ($from->{'href'}[$i]) {
1321                                 $line = '--- ' .
1322                                         $cgi->a({-href=>href(action=>"blobdiff",
1323                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1324                                                              hash_parent_base=>$parents[$i],
1325                                                              file_parent=>$from->{'file'}[$i],
1326                                                              hash=>$diffinfo->{'to_id'},
1327                                                              hash_base=>$hash,
1328                                                              file_name=>$to->{'file'}),
1329                                                  -class=>"path",
1330                                                  -title=>"diff" . ($i+1)},
1331                                                 $i+1) .
1332                                         '/' .
1333                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1334                                                 esc_path($from->{'file'}[$i]));
1335                         } else {
1336                                 $line = '--- /dev/null';
1337                         }
1338                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1339                 }
1340         }
1341
1342         $line = $to_line;
1343         #assert($line =~ m/^\+\+\+/) if DEBUG;
1344         # no extra formatting for "^+++ /dev/null"
1345         if ($line =~ m!^\+\+\+ "?b/!) {
1346                 if ($to->{'href'}) {
1347                         $line = '+++ b/' .
1348                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1349                                         esc_path($to->{'file'}));
1350                 } else {
1351                         $line = '+++ b/' .
1352                                 esc_path($to->{'file'});
1353                 }
1354         }
1355         $result .= qq!<div class="diff to_file">$line</div>\n!;
1356
1357         return $result;
1358 }
1359
1360 # create note for patch simplified by combined diff
1361 sub format_diff_cc_simplified {
1362         my ($diffinfo, @parents) = @_;
1363         my $result = '';
1364
1365         $result .= "<div class=\"diff header\">" .
1366                    "diff --cc ";
1367         if (!is_deleted($diffinfo)) {
1368                 $result .= $cgi->a({-href => href(action=>"blob",
1369                                                   hash_base=>$hash,
1370                                                   hash=>$diffinfo->{'to_id'},
1371                                                   file_name=>$diffinfo->{'to_file'}),
1372                                     -class => "path"},
1373                                    esc_path($diffinfo->{'to_file'}));
1374         } else {
1375                 $result .= esc_path($diffinfo->{'to_file'});
1376         }
1377         $result .= "</div>\n" . # class="diff header"
1378                    "<div class=\"diff nodifferences\">" .
1379                    "Simple merge" .
1380                    "</div>\n"; # class="diff nodifferences"
1381
1382         return $result;
1383 }
1384
1385 # format patch (diff) line (not to be used for diff headers)
1386 sub format_diff_line {
1387         my $line = shift;
1388         my ($from, $to) = @_;
1389         my $diff_class = "";
1390
1391         chomp $line;
1392
1393         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1394                 # combined diff
1395                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1396                 if ($line =~ m/^\@{3}/) {
1397                         $diff_class = " chunk_header";
1398                 } elsif ($line =~ m/^\\/) {
1399                         $diff_class = " incomplete";
1400                 } elsif ($prefix =~ tr/+/+/) {
1401                         $diff_class = " add";
1402                 } elsif ($prefix =~ tr/-/-/) {
1403                         $diff_class = " rem";
1404                 }
1405         } else {
1406                 # assume ordinary diff
1407                 my $char = substr($line, 0, 1);
1408                 if ($char eq '+') {
1409                         $diff_class = " add";
1410                 } elsif ($char eq '-') {
1411                         $diff_class = " rem";
1412                 } elsif ($char eq '@') {
1413                         $diff_class = " chunk_header";
1414                 } elsif ($char eq "\\") {
1415                         $diff_class = " incomplete";
1416                 }
1417         }
1418         $line = untabify($line);
1419         if ($from && $to && $line =~ m/^\@{2} /) {
1420                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1421                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1422
1423                 $from_lines = 0 unless defined $from_lines;
1424                 $to_lines   = 0 unless defined $to_lines;
1425
1426                 if ($from->{'href'}) {
1427                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1428                                              -class=>"list"}, $from_text);
1429                 }
1430                 if ($to->{'href'}) {
1431                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1432                                              -class=>"list"}, $to_text);
1433                 }
1434                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1435                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1436                 return "<div class=\"diff$diff_class\">$line</div>\n";
1437         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1438                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1439                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1440
1441                 @from_text = split(' ', $ranges);
1442                 for (my $i = 0; $i < @from_text; ++$i) {
1443                         ($from_start[$i], $from_nlines[$i]) =
1444                                 (split(',', substr($from_text[$i], 1)), 0);
1445                 }
1446
1447                 $to_text   = pop @from_text;
1448                 $to_start  = pop @from_start;
1449                 $to_nlines = pop @from_nlines;
1450
1451                 $line = "<span class=\"chunk_info\">$prefix ";
1452                 for (my $i = 0; $i < @from_text; ++$i) {
1453                         if ($from->{'href'}[$i]) {
1454                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1455                                                   -class=>"list"}, $from_text[$i]);
1456                         } else {
1457                                 $line .= $from_text[$i];
1458                         }
1459                         $line .= " ";
1460                 }
1461                 if ($to->{'href'}) {
1462                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1463                                           -class=>"list"}, $to_text);
1464                 } else {
1465                         $line .= $to_text;
1466                 }
1467                 $line .= " $prefix</span>" .
1468                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1469                 return "<div class=\"diff$diff_class\">$line</div>\n";
1470         }
1471         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1472 }
1473
1474 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1475 # linked.  Pass the hash of the tree/commit to snapshot.
1476 sub format_snapshot_links {
1477         my ($hash) = @_;
1478         my @snapshot_fmts = gitweb_check_feature('snapshot');
1479         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1480         my $num_fmts = @snapshot_fmts;
1481         if ($num_fmts > 1) {
1482                 # A parenthesized list of links bearing format names.
1483                 # e.g. "snapshot (_tar.gz_ _zip_)"
1484                 return "snapshot (" . join(' ', map
1485                         $cgi->a({
1486                                 -href => href(
1487                                         action=>"snapshot",
1488                                         hash=>$hash,
1489                                         snapshot_format=>$_
1490                                 )
1491                         }, $known_snapshot_formats{$_}{'display'})
1492                 , @snapshot_fmts) . ")";
1493         } elsif ($num_fmts == 1) {
1494                 # A single "snapshot" link whose tooltip bears the format name.
1495                 # i.e. "_snapshot_"
1496                 my ($fmt) = @snapshot_fmts;
1497                 return
1498                         $cgi->a({
1499                                 -href => href(
1500                                         action=>"snapshot",
1501                                         hash=>$hash,
1502                                         snapshot_format=>$fmt
1503                                 ),
1504                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1505                         }, "snapshot");
1506         } else { # $num_fmts == 0
1507                 return undef;
1508         }
1509 }
1510
1511 ## ......................................................................
1512 ## functions returning values to be passed, perhaps after some
1513 ## transformation, to other functions; e.g. returning arguments to href()
1514
1515 # returns hash to be passed to href to generate gitweb URL
1516 # in -title key it returns description of link
1517 sub get_feed_info {
1518         my $format = shift || 'Atom';
1519         my %res = (action => lc($format));
1520
1521         # feed links are possible only for project views
1522         return unless (defined $project);
1523         # some views should link to OPML, or to generic project feed,
1524         # or don't have specific feed yet (so they should use generic)
1525         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1526
1527         my $branch;
1528         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1529         # from tag links; this also makes possible to detect branch links
1530         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1531             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1532                 $branch = $1;
1533         }
1534         # find log type for feed description (title)
1535         my $type = 'log';
1536         if (defined $file_name) {
1537                 $type  = "history of $file_name";
1538                 $type .= "/" if ($action eq 'tree');
1539                 $type .= " on '$branch'" if (defined $branch);
1540         } else {
1541                 $type = "log of $branch" if (defined $branch);
1542         }
1543
1544         $res{-title} = $type;
1545         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1546         $res{'file_name'} = $file_name;
1547
1548         return %res;
1549 }
1550
1551 ## ----------------------------------------------------------------------
1552 ## git utility subroutines, invoking git commands
1553
1554 # returns path to the core git executable and the --git-dir parameter as list
1555 sub git_cmd {
1556         return $GIT, '--git-dir='.$git_dir;
1557 }
1558
1559 # quote the given arguments for passing them to the shell
1560 # quote_command("command", "arg 1", "arg with ' and ! characters")
1561 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1562 # Try to avoid using this function wherever possible.
1563 sub quote_command {
1564         return join(' ',
1565                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1566 }
1567
1568 # get HEAD ref of given project as hash
1569 sub git_get_head_hash {
1570         my $project = shift;
1571         my $o_git_dir = $git_dir;
1572         my $retval = undef;
1573         $git_dir = "$projectroot/$project";
1574         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1575                 my $head = <$fd>;
1576                 close $fd;
1577                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1578                         $retval = $1;
1579                 }
1580         }
1581         if (defined $o_git_dir) {
1582                 $git_dir = $o_git_dir;
1583         }
1584         return $retval;
1585 }
1586
1587 # get type of given object
1588 sub git_get_type {
1589         my $hash = shift;
1590
1591         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1592         my $type = <$fd>;
1593         close $fd or return;
1594         chomp $type;
1595         return $type;
1596 }
1597
1598 # repository configuration
1599 our $config_file = '';
1600 our %config;
1601
1602 # store multiple values for single key as anonymous array reference
1603 # single values stored directly in the hash, not as [ <value> ]
1604 sub hash_set_multi {
1605         my ($hash, $key, $value) = @_;
1606
1607         if (!exists $hash->{$key}) {
1608                 $hash->{$key} = $value;
1609         } elsif (!ref $hash->{$key}) {
1610                 $hash->{$key} = [ $hash->{$key}, $value ];
1611         } else {
1612                 push @{$hash->{$key}}, $value;
1613         }
1614 }
1615
1616 # return hash of git project configuration
1617 # optionally limited to some section, e.g. 'gitweb'
1618 sub git_parse_project_config {
1619         my $section_regexp = shift;
1620         my %config;
1621
1622         local $/ = "\0";
1623
1624         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1625                 or return;
1626
1627         while (my $keyval = <$fh>) {
1628                 chomp $keyval;
1629                 my ($key, $value) = split(/\n/, $keyval, 2);
1630
1631                 hash_set_multi(\%config, $key, $value)
1632                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1633         }
1634         close $fh;
1635
1636         return %config;
1637 }
1638
1639 # convert config value to boolean, 'true' or 'false'
1640 # no value, number > 0, 'true' and 'yes' values are true
1641 # rest of values are treated as false (never as error)
1642 sub config_to_bool {
1643         my $val = shift;
1644
1645         # strip leading and trailing whitespace
1646         $val =~ s/^\s+//;
1647         $val =~ s/\s+$//;
1648
1649         return (!defined $val ||               # section.key
1650                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1651                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1652 }
1653
1654 # convert config value to simple decimal number
1655 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1656 # to be multiplied by 1024, 1048576, or 1073741824
1657 sub config_to_int {
1658         my $val = shift;
1659
1660         # strip leading and trailing whitespace
1661         $val =~ s/^\s+//;
1662         $val =~ s/\s+$//;
1663
1664         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1665                 $unit = lc($unit);
1666                 # unknown unit is treated as 1
1667                 return $num * ($unit eq 'g' ? 1073741824 :
1668                                $unit eq 'm' ?    1048576 :
1669                                $unit eq 'k' ?       1024 : 1);
1670         }
1671         return $val;
1672 }
1673
1674 # convert config value to array reference, if needed
1675 sub config_to_multi {
1676         my $val = shift;
1677
1678         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1679 }
1680
1681 sub git_get_project_config {
1682         my ($key, $type) = @_;
1683
1684         # key sanity check
1685         return unless ($key);
1686         $key =~ s/^gitweb\.//;
1687         return if ($key =~ m/\W/);
1688
1689         # type sanity check
1690         if (defined $type) {
1691                 $type =~ s/^--//;
1692                 $type = undef
1693                         unless ($type eq 'bool' || $type eq 'int');
1694         }
1695
1696         # get config
1697         if (!defined $config_file ||
1698             $config_file ne "$git_dir/config") {
1699                 %config = git_parse_project_config('gitweb');
1700                 $config_file = "$git_dir/config";
1701         }
1702
1703         # ensure given type
1704         if (!defined $type) {
1705                 return $config{"gitweb.$key"};
1706         } elsif ($type eq 'bool') {
1707                 # backward compatibility: 'git config --bool' returns true/false
1708                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1709         } elsif ($type eq 'int') {
1710                 return config_to_int($config{"gitweb.$key"});
1711         }
1712         return $config{"gitweb.$key"};
1713 }
1714
1715 # get hash of given path at given ref
1716 sub git_get_hash_by_path {
1717         my $base = shift;
1718         my $path = shift || return undef;
1719         my $type = shift;
1720
1721         $path =~ s,/+$,,;
1722
1723         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1724                 or die_error(500, "Open git-ls-tree failed");
1725         my $line = <$fd>;
1726         close $fd or return undef;
1727
1728         if (!defined $line) {
1729                 # there is no tree or hash given by $path at $base
1730                 return undef;
1731         }
1732
1733         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1734         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1735         if (defined $type && $type ne $2) {
1736                 # type doesn't match
1737                 return undef;
1738         }
1739         return $3;
1740 }
1741
1742 # get path of entry with given hash at given tree-ish (ref)
1743 # used to get 'from' filename for combined diff (merge commit) for renames
1744 sub git_get_path_by_hash {
1745         my $base = shift || return;
1746         my $hash = shift || return;
1747
1748         local $/ = "\0";
1749
1750         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1751                 or return undef;
1752         while (my $line = <$fd>) {
1753                 chomp $line;
1754
1755                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1756                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1757                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1758                         close $fd;
1759                         return $1;
1760                 }
1761         }
1762         close $fd;
1763         return undef;
1764 }
1765
1766 ## ......................................................................
1767 ## git utility functions, directly accessing git repository
1768
1769 sub git_get_project_description {
1770         my $path = shift;
1771
1772         $git_dir = "$projectroot/$path";
1773         open my $fd, "$git_dir/description"
1774                 or return git_get_project_config('description');
1775         my $descr = <$fd>;
1776         close $fd;
1777         if (defined $descr) {
1778                 chomp $descr;
1779         }
1780         return $descr;
1781 }
1782
1783 sub git_get_project_ctags {
1784         my $path = shift;
1785         my $ctags = {};
1786
1787         $git_dir = "$projectroot/$path";
1788         foreach (<$git_dir/ctags/*>) {
1789                 open CT, $_ or next;
1790                 my $val = <CT>;
1791                 chomp $val;
1792                 close CT;
1793                 my $ctag = $_; $ctag =~ s#.*/##;
1794                 $ctags->{$ctag} = $val;
1795         }
1796         $ctags;
1797 }
1798
1799 sub git_populate_project_tagcloud {
1800         my $ctags = shift;
1801
1802         # First, merge different-cased tags; tags vote on casing
1803         my %ctags_lc;
1804         foreach (keys %$ctags) {
1805                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1806                 if (not $ctags_lc{lc $_}->{topcount}
1807                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1808                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1809                         $ctags_lc{lc $_}->{topname} = $_;
1810                 }
1811         }
1812
1813         my $cloud;
1814         if (eval { require HTML::TagCloud; 1; }) {
1815                 $cloud = HTML::TagCloud->new;
1816                 foreach (sort keys %ctags_lc) {
1817                         # Pad the title with spaces so that the cloud looks
1818                         # less crammed.
1819                         my $title = $ctags_lc{$_}->{topname};
1820                         $title =~ s/ /&nbsp;/g;
1821                         $title =~ s/^/&nbsp;/g;
1822                         $title =~ s/$/&nbsp;/g;
1823                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1824                 }
1825         } else {
1826                 $cloud = \%ctags_lc;
1827         }
1828         $cloud;
1829 }
1830
1831 sub git_show_project_tagcloud {
1832         my ($cloud, $count) = @_;
1833         print STDERR ref($cloud)."..\n";
1834         if (ref $cloud eq 'HTML::TagCloud') {
1835                 return $cloud->html_and_css($count);
1836         } else {
1837                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
1838                 return '<p align="center">' . join (', ', map {
1839                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
1840                 } splice(@tags, 0, $count)) . '</p>';
1841         }
1842 }
1843
1844 sub git_get_project_url_list {
1845         my $path = shift;
1846
1847         $git_dir = "$projectroot/$path";
1848         open my $fd, "$git_dir/cloneurl"
1849                 or return wantarray ?
1850                 @{ config_to_multi(git_get_project_config('url')) } :
1851                    config_to_multi(git_get_project_config('url'));
1852         my @git_project_url_list = map { chomp; $_ } <$fd>;
1853         close $fd;
1854
1855         return wantarray ? @git_project_url_list : \@git_project_url_list;
1856 }
1857
1858 sub git_get_projects_list {
1859         my ($filter) = @_;
1860         my @list;
1861
1862         $filter ||= '';
1863         $filter =~ s/\.git$//;
1864
1865         my ($check_forks) = gitweb_check_feature('forks');
1866
1867         if (-d $projects_list) {
1868                 # search in directory
1869                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1870                 # remove the trailing "/"
1871                 $dir =~ s!/+$!!;
1872                 my $pfxlen = length("$dir");
1873                 my $pfxdepth = ($dir =~ tr!/!!);
1874
1875                 File::Find::find({
1876                         follow_fast => 1, # follow symbolic links
1877                         follow_skip => 2, # ignore duplicates
1878                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1879                         wanted => sub {
1880                                 # skip project-list toplevel, if we get it.
1881                                 return if (m!^[/.]$!);
1882                                 # only directories can be git repositories
1883                                 return unless (-d $_);
1884                                 # don't traverse too deep (Find is super slow on os x)
1885                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1886                                         $File::Find::prune = 1;
1887                                         return;
1888                                 }
1889
1890                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1891                                 # we check related file in $projectroot
1892                                 if ($check_forks and $subdir =~ m#/.#) {
1893                                         $File::Find::prune = 1;
1894                                 } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
1895                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1896                                         $File::Find::prune = 1;
1897                                 }
1898                         },
1899                 }, "$dir");
1900
1901         } elsif (-f $projects_list) {
1902                 # read from file(url-encoded):
1903                 # 'git%2Fgit.git Linus+Torvalds'
1904                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1905                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1906                 my %paths;
1907                 open my ($fd), $projects_list or return;
1908         PROJECT:
1909                 while (my $line = <$fd>) {
1910                         chomp $line;
1911                         my ($path, $owner) = split ' ', $line;
1912                         $path = unescape($path);
1913                         $owner = unescape($owner);
1914                         if (!defined $path) {
1915                                 next;
1916                         }
1917                         if ($filter ne '') {
1918                                 # looking for forks;
1919                                 my $pfx = substr($path, 0, length($filter));
1920                                 if ($pfx ne $filter) {
1921                                         next PROJECT;
1922                                 }
1923                                 my $sfx = substr($path, length($filter));
1924                                 if ($sfx !~ /^\/.*\.git$/) {
1925                                         next PROJECT;
1926                                 }
1927                         } elsif ($check_forks) {
1928                         PATH:
1929                                 foreach my $filter (keys %paths) {
1930                                         # looking for forks;
1931                                         my $pfx = substr($path, 0, length($filter));
1932                                         if ($pfx ne $filter) {
1933                                                 next PATH;
1934                                         }
1935                                         my $sfx = substr($path, length($filter));
1936                                         if ($sfx !~ /^\/.*\.git$/) {
1937                                                 next PATH;
1938                                         }
1939                                         # is a fork, don't include it in
1940                                         # the list
1941                                         next PROJECT;
1942                                 }
1943                         }
1944                         if (check_export_ok("$projectroot/$path")) {
1945                                 my $pr = {
1946                                         path => $path,
1947                                         owner => to_utf8($owner),
1948                                 };
1949                                 push @list, $pr;
1950                                 (my $forks_path = $path) =~ s/\.git$//;
1951                                 $paths{$forks_path}++;
1952                         }
1953                 }
1954                 close $fd;
1955         }
1956         return @list;
1957 }
1958
1959 our $gitweb_project_owner = undef;
1960 sub git_get_project_list_from_file {
1961
1962         return if (defined $gitweb_project_owner);
1963
1964         $gitweb_project_owner = {};
1965         # read from file (url-encoded):
1966         # 'git%2Fgit.git Linus+Torvalds'
1967         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1968         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1969         if (-f $projects_list) {
1970                 open (my $fd , $projects_list);
1971                 while (my $line = <$fd>) {
1972                         chomp $line;
1973                         my ($pr, $ow) = split ' ', $line;
1974                         $pr = unescape($pr);
1975                         $ow = unescape($ow);
1976                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1977                 }
1978                 close $fd;
1979         }
1980 }
1981
1982 sub git_get_project_owner {
1983         my $project = shift;
1984         my $owner;
1985
1986         return undef unless $project;
1987         $git_dir = "$projectroot/$project";
1988
1989         if (!defined $gitweb_project_owner) {
1990                 git_get_project_list_from_file();
1991         }
1992
1993         if (exists $gitweb_project_owner->{$project}) {
1994                 $owner = $gitweb_project_owner->{$project};
1995         }
1996         if (!defined $owner){
1997                 $owner = git_get_project_config('owner');
1998         }
1999         if (!defined $owner) {
2000                 $owner = get_file_owner("$git_dir");
2001         }
2002
2003         return $owner;
2004 }
2005
2006 sub git_get_last_activity {
2007         my ($path) = @_;
2008         my $fd;
2009
2010         $git_dir = "$projectroot/$path";
2011         open($fd, "-|", git_cmd(), 'for-each-ref',
2012              '--format=%(committer)',
2013              '--sort=-committerdate',
2014              '--count=1',
2015              'refs/heads') or return;
2016         my $most_recent = <$fd>;
2017         close $fd or return;
2018         if (defined $most_recent &&
2019             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2020                 my $timestamp = $1;
2021                 my $age = time - $timestamp;
2022                 return ($age, age_string($age));
2023         }
2024         return (undef, undef);
2025 }
2026
2027 sub git_get_references {
2028         my $type = shift || "";
2029         my %refs;
2030         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2031         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2032         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2033                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2034                 or return;
2035
2036         while (my $line = <$fd>) {
2037                 chomp $line;
2038                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2039                         if (defined $refs{$1}) {
2040                                 push @{$refs{$1}}, $2;
2041                         } else {
2042                                 $refs{$1} = [ $2 ];
2043                         }
2044                 }
2045         }
2046         close $fd or return;
2047         return \%refs;
2048 }
2049
2050 sub git_get_rev_name_tags {
2051         my $hash = shift || return undef;
2052
2053         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2054                 or return;
2055         my $name_rev = <$fd>;
2056         close $fd;
2057
2058         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2059                 return $1;
2060         } else {
2061                 # catches also '$hash undefined' output
2062                 return undef;
2063         }
2064 }
2065
2066 ## ----------------------------------------------------------------------
2067 ## parse to hash functions
2068
2069 sub parse_date {
2070         my $epoch = shift;
2071         my $tz = shift || "-0000";
2072
2073         my %date;
2074         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2075         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2076         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2077         $date{'hour'} = $hour;
2078         $date{'minute'} = $min;
2079         $date{'mday'} = $mday;
2080         $date{'day'} = $days[$wday];
2081         $date{'month'} = $months[$mon];
2082         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2083                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2084         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2085                              $mday, $months[$mon], $hour ,$min;
2086         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2087                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2088
2089         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2090         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2091         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2092         $date{'hour_local'} = $hour;
2093         $date{'minute_local'} = $min;
2094         $date{'tz_local'} = $tz;
2095         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2096                                   1900+$year, $mon+1, $mday,
2097                                   $hour, $min, $sec, $tz);
2098         return %date;
2099 }
2100
2101 sub parse_tag {
2102         my $tag_id = shift;
2103         my %tag;
2104         my @comment;
2105
2106         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2107         $tag{'id'} = $tag_id;
2108         while (my $line = <$fd>) {
2109                 chomp $line;
2110                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2111                         $tag{'object'} = $1;
2112                 } elsif ($line =~ m/^type (.+)$/) {
2113                         $tag{'type'} = $1;
2114                 } elsif ($line =~ m/^tag (.+)$/) {
2115                         $tag{'name'} = $1;
2116                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2117                         $tag{'author'} = $1;
2118                         $tag{'epoch'} = $2;
2119                         $tag{'tz'} = $3;
2120                 } elsif ($line =~ m/--BEGIN/) {
2121                         push @comment, $line;
2122                         last;
2123                 } elsif ($line eq "") {
2124                         last;
2125                 }
2126         }
2127         push @comment, <$fd>;
2128         $tag{'comment'} = \@comment;
2129         close $fd or return;
2130         if (!defined $tag{'name'}) {
2131                 return
2132         };
2133         return %tag
2134 }
2135
2136 sub parse_commit_text {
2137         my ($commit_text, $withparents) = @_;
2138         my @commit_lines = split '\n', $commit_text;
2139         my %co;
2140
2141         pop @commit_lines; # Remove '\0'
2142
2143         if (! @commit_lines) {
2144                 return;
2145         }
2146
2147         my $header = shift @commit_lines;
2148         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2149                 return;
2150         }
2151         ($co{'id'}, my @parents) = split ' ', $header;
2152         while (my $line = shift @commit_lines) {
2153                 last if $line eq "\n";
2154                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2155                         $co{'tree'} = $1;
2156                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2157                         push @parents, $1;
2158                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2159                         $co{'author'} = $1;
2160                         $co{'author_epoch'} = $2;
2161                         $co{'author_tz'} = $3;
2162                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2163                                 $co{'author_name'}  = $1;
2164                                 $co{'author_email'} = $2;
2165                         } else {
2166                                 $co{'author_name'} = $co{'author'};
2167                         }
2168                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2169                         $co{'committer'} = $1;
2170                         $co{'committer_epoch'} = $2;
2171                         $co{'committer_tz'} = $3;
2172                         $co{'committer_name'} = $co{'committer'};
2173                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2174                                 $co{'committer_name'}  = $1;
2175                                 $co{'committer_email'} = $2;
2176                         } else {
2177                                 $co{'committer_name'} = $co{'committer'};
2178                         }
2179                 }
2180         }
2181         if (!defined $co{'tree'}) {
2182                 return;
2183         };
2184         $co{'parents'} = \@parents;
2185         $co{'parent'} = $parents[0];
2186
2187         foreach my $title (@commit_lines) {
2188                 $title =~ s/^    //;
2189                 if ($title ne "") {
2190                         $co{'title'} = chop_str($title, 80, 5);
2191                         # remove leading stuff of merges to make the interesting part visible
2192                         if (length($title) > 50) {
2193                                 $title =~ s/^Automatic //;
2194                                 $title =~ s/^merge (of|with) /Merge ... /i;
2195                                 if (length($title) > 50) {
2196                                         $title =~ s/(http|rsync):\/\///;
2197                                 }
2198                                 if (length($title) > 50) {
2199                                         $title =~ s/(master|www|rsync)\.//;
2200                                 }
2201                                 if (length($title) > 50) {
2202                                         $title =~ s/kernel.org:?//;
2203                                 }
2204                                 if (length($title) > 50) {
2205                                         $title =~ s/\/pub\/scm//;
2206                                 }
2207                         }
2208                         $co{'title_short'} = chop_str($title, 50, 5);
2209                         last;
2210                 }
2211         }
2212         if (! defined $co{'title'} || $co{'title'} eq "") {
2213                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2214         }
2215         # remove added spaces
2216         foreach my $line (@commit_lines) {
2217                 $line =~ s/^    //;
2218         }
2219         $co{'comment'} = \@commit_lines;
2220
2221         my $age = time - $co{'committer_epoch'};
2222         $co{'age'} = $age;
2223         $co{'age_string'} = age_string($age);
2224         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2225         if ($age > 60*60*24*7*2) {
2226                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2227                 $co{'age_string_age'} = $co{'age_string'};
2228         } else {
2229                 $co{'age_string_date'} = $co{'age_string'};
2230                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2231         }
2232         return %co;
2233 }
2234
2235 sub parse_commit {
2236         my ($commit_id) = @_;
2237         my %co;
2238
2239         local $/ = "\0";
2240
2241         open my $fd, "-|", git_cmd(), "rev-list",
2242                 "--parents",
2243                 "--header",
2244                 "--max-count=1",
2245                 $commit_id,
2246                 "--",
2247                 or die_error(500, "Open git-rev-list failed");
2248         %co = parse_commit_text(<$fd>, 1);
2249         close $fd;
2250
2251         return %co;
2252 }
2253
2254 sub parse_commits {
2255         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2256         my @cos;
2257
2258         $maxcount ||= 1;
2259         $skip ||= 0;
2260
2261         local $/ = "\0";
2262
2263         open my $fd, "-|", git_cmd(), "rev-list",
2264                 "--header",
2265                 @args,
2266                 ("--max-count=" . $maxcount),
2267                 ("--skip=" . $skip),
2268                 @extra_options,
2269                 $commit_id,
2270                 "--",
2271                 ($filename ? ($filename) : ())
2272                 or die_error(500, "Open git-rev-list failed");
2273         while (my $line = <$fd>) {
2274                 my %co = parse_commit_text($line);
2275                 push @cos, \%co;
2276         }
2277         close $fd;
2278
2279         return wantarray ? @cos : \@cos;
2280 }
2281
2282 # parse line of git-diff-tree "raw" output
2283 sub parse_difftree_raw_line {
2284         my $line = shift;
2285         my %res;
2286
2287         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2288         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2289         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2290                 $res{'from_mode'} = $1;
2291                 $res{'to_mode'} = $2;
2292                 $res{'from_id'} = $3;
2293                 $res{'to_id'} = $4;
2294                 $res{'status'} = $5;
2295                 $res{'similarity'} = $6;
2296                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2297                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2298                 } else {
2299                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2300                 }
2301         }
2302         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2303         # combined diff (for merge commit)
2304         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2305                 $res{'nparents'}  = length($1);
2306                 $res{'from_mode'} = [ split(' ', $2) ];
2307                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2308                 $res{'from_id'} = [ split(' ', $3) ];
2309                 $res{'to_id'} = pop @{$res{'from_id'}};
2310                 $res{'status'} = [ split('', $4) ];
2311                 $res{'to_file'} = unquote($5);
2312         }
2313         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2314         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2315                 $res{'commit'} = $1;
2316         }
2317
2318         return wantarray ? %res : \%res;
2319 }
2320
2321 # wrapper: return parsed line of git-diff-tree "raw" output
2322 # (the argument might be raw line, or parsed info)
2323 sub parsed_difftree_line {
2324         my $line_or_ref = shift;
2325
2326         if (ref($line_or_ref) eq "HASH") {
2327                 # pre-parsed (or generated by hand)
2328                 return $line_or_ref;
2329         } else {
2330                 return parse_difftree_raw_line($line_or_ref);
2331         }
2332 }
2333
2334 # parse line of git-ls-tree output
2335 sub parse_ls_tree_line ($;%) {
2336         my $line = shift;
2337         my %opts = @_;
2338         my %res;
2339
2340         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2341         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2342
2343         $res{'mode'} = $1;
2344         $res{'type'} = $2;
2345         $res{'hash'} = $3;
2346         if ($opts{'-z'}) {
2347                 $res{'name'} = $4;
2348         } else {
2349                 $res{'name'} = unquote($4);
2350         }
2351
2352         return wantarray ? %res : \%res;
2353 }
2354
2355 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2356 sub parse_from_to_diffinfo {
2357         my ($diffinfo, $from, $to, @parents) = @_;
2358
2359         if ($diffinfo->{'nparents'}) {
2360                 # combined diff
2361                 $from->{'file'} = [];
2362                 $from->{'href'} = [];
2363                 fill_from_file_info($diffinfo, @parents)
2364                         unless exists $diffinfo->{'from_file'};
2365                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2366                         $from->{'file'}[$i] =
2367                                 defined $diffinfo->{'from_file'}[$i] ?
2368                                         $diffinfo->{'from_file'}[$i] :
2369                                         $diffinfo->{'to_file'};
2370                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2371                                 $from->{'href'}[$i] = href(action=>"blob",
2372                                                            hash_base=>$parents[$i],
2373                                                            hash=>$diffinfo->{'from_id'}[$i],
2374                                                            file_name=>$from->{'file'}[$i]);
2375                         } else {
2376                                 $from->{'href'}[$i] = undef;
2377                         }
2378                 }
2379         } else {
2380                 # ordinary (not combined) diff
2381                 $from->{'file'} = $diffinfo->{'from_file'};
2382                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2383                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2384                                                hash=>$diffinfo->{'from_id'},
2385                                                file_name=>$from->{'file'});
2386                 } else {
2387                         delete $from->{'href'};
2388                 }
2389         }
2390
2391         $to->{'file'} = $diffinfo->{'to_file'};
2392         if (!is_deleted($diffinfo)) { # file exists in result
2393                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2394                                      hash=>$diffinfo->{'to_id'},
2395                                      file_name=>$to->{'file'});
2396         } else {
2397                 delete $to->{'href'};
2398         }
2399 }
2400
2401 ## ......................................................................
2402 ## parse to array of hashes functions
2403
2404 sub git_get_heads_list {
2405         my $limit = shift;
2406         my @headslist;
2407
2408         open my $fd, '-|', git_cmd(), 'for-each-ref',
2409                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2410                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2411                 'refs/heads'
2412                 or return;
2413         while (my $line = <$fd>) {
2414                 my %ref_item;
2415
2416                 chomp $line;
2417                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2418                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2419                 my ($committer, $epoch, $tz) =
2420                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2421                 $ref_item{'fullname'}  = $name;
2422                 $name =~ s!^refs/heads/!!;
2423
2424                 $ref_item{'name'}  = $name;
2425                 $ref_item{'id'}    = $hash;
2426                 $ref_item{'title'} = $title || '(no commit message)';
2427                 $ref_item{'epoch'} = $epoch;
2428                 if ($epoch) {
2429                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2430                 } else {
2431                         $ref_item{'age'} = "unknown";
2432                 }
2433
2434                 push @headslist, \%ref_item;
2435         }
2436         close $fd;
2437
2438         return wantarray ? @headslist : \@headslist;
2439 }
2440
2441 sub git_get_tags_list {
2442         my $limit = shift;
2443         my @tagslist;
2444
2445         open my $fd, '-|', git_cmd(), 'for-each-ref',
2446                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2447                 '--format=%(objectname) %(objecttype) %(refname) '.
2448                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2449                 'refs/tags'
2450                 or return;
2451         while (my $line = <$fd>) {
2452                 my %ref_item;
2453
2454                 chomp $line;
2455                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2456                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2457                 my ($creator, $epoch, $tz) =
2458                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2459                 $ref_item{'fullname'} = $name;
2460                 $name =~ s!^refs/tags/!!;
2461
2462                 $ref_item{'type'} = $type;
2463                 $ref_item{'id'} = $id;
2464                 $ref_item{'name'} = $name;
2465                 if ($type eq "tag") {
2466                         $ref_item{'subject'} = $title;
2467                         $ref_item{'reftype'} = $reftype;
2468                         $ref_item{'refid'}   = $refid;
2469                 } else {
2470                         $ref_item{'reftype'} = $type;
2471                         $ref_item{'refid'}   = $id;
2472                 }
2473
2474                 if ($type eq "tag" || $type eq "commit") {
2475                         $ref_item{'epoch'} = $epoch;
2476                         if ($epoch) {
2477                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2478                         } else {
2479                                 $ref_item{'age'} = "unknown";
2480                         }
2481                 }
2482
2483                 push @tagslist, \%ref_item;
2484         }
2485         close $fd;
2486
2487         return wantarray ? @tagslist : \@tagslist;
2488 }
2489
2490 ## ----------------------------------------------------------------------
2491 ## filesystem-related functions
2492
2493 sub get_file_owner {
2494         my $path = shift;
2495
2496         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2497         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2498         if (!defined $gcos) {
2499                 return undef;
2500         }
2501         my $owner = $gcos;
2502         $owner =~ s/[,;].*$//;
2503         return to_utf8($owner);
2504 }
2505
2506 ## ......................................................................
2507 ## mimetype related functions
2508
2509 sub mimetype_guess_file {
2510         my $filename = shift;
2511         my $mimemap = shift;
2512         -r $mimemap or return undef;
2513
2514         my %mimemap;
2515         open(MIME, $mimemap) or return undef;
2516         while (<MIME>) {
2517                 next if m/^#/; # skip comments
2518                 my ($mime, $exts) = split(/\t+/);
2519                 if (defined $exts) {
2520                         my @exts = split(/\s+/, $exts);
2521                         foreach my $ext (@exts) {
2522                                 $mimemap{$ext} = $mime;
2523                         }
2524                 }
2525         }
2526         close(MIME);
2527
2528         $filename =~ /\.([^.]*)$/;
2529         return $mimemap{$1};
2530 }
2531
2532 sub mimetype_guess {
2533         my $filename = shift;
2534         my $mime;
2535         $filename =~ /\./ or return undef;
2536
2537         if ($mimetypes_file) {
2538                 my $file = $mimetypes_file;
2539                 if ($file !~ m!^/!) { # if it is relative path
2540                         # it is relative to project
2541                         $file = "$projectroot/$project/$file";
2542                 }
2543                 $mime = mimetype_guess_file($filename, $file);
2544         }
2545         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2546         return $mime;
2547 }
2548
2549 sub blob_mimetype {
2550         my $fd = shift;
2551         my $filename = shift;
2552
2553         if ($filename) {
2554                 my $mime = mimetype_guess($filename);
2555                 $mime and return $mime;
2556         }
2557
2558         # just in case
2559         return $default_blob_plain_mimetype unless $fd;
2560
2561         if (-T $fd) {
2562                 return 'text/plain';
2563         } elsif (! $filename) {
2564                 return 'application/octet-stream';
2565         } elsif ($filename =~ m/\.png$/i) {
2566                 return 'image/png';
2567         } elsif ($filename =~ m/\.gif$/i) {
2568                 return 'image/gif';
2569         } elsif ($filename =~ m/\.jpe?g$/i) {
2570                 return 'image/jpeg';
2571         } else {
2572                 return 'application/octet-stream';
2573         }
2574 }
2575
2576 sub blob_contenttype {
2577         my ($fd, $file_name, $type) = @_;
2578
2579         $type ||= blob_mimetype($fd, $file_name);
2580         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2581                 $type .= "; charset=$default_text_plain_charset";
2582         }
2583
2584         return $type;
2585 }
2586
2587 ## ======================================================================
2588 ## functions printing HTML: header, footer, error page
2589
2590 sub git_header_html {
2591         my $status = shift || "200 OK";
2592         my $expires = shift;
2593
2594         my $title = "$site_name";
2595         if (defined $project) {
2596                 $title .= " - " . to_utf8($project);
2597                 if (defined $action) {
2598                         $title .= "/$action";
2599                         if (defined $file_name) {
2600                                 $title .= " - " . esc_path($file_name);
2601                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2602                                         $title .= "/";
2603                                 }
2604                         }
2605                 }
2606         }
2607         my $content_type;
2608         # require explicit support from the UA if we are to send the page as
2609         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2610         # we have to do this because MSIE sometimes globs '*/*', pretending to
2611         # support xhtml+xml but choking when it gets what it asked for.
2612         if (defined $cgi->http('HTTP_ACCEPT') &&
2613             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2614             $cgi->Accept('application/xhtml+xml') != 0) {
2615                 $content_type = 'application/xhtml+xml';
2616         } else {
2617                 $content_type = 'text/html';
2618         }
2619         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2620                            -status=> $status, -expires => $expires);
2621         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2622         print <<EOF;
2623 <?xml version="1.0" encoding="utf-8"?>
2624 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2625 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2626 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2627 <!-- git core binaries version $git_version -->
2628 <head>
2629 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2630 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2631 <meta name="robots" content="index, nofollow"/>
2632 <title>$title</title>
2633 EOF
2634 # print out each stylesheet that exist
2635         if (defined $stylesheet) {
2636 #provides backwards capability for those people who define style sheet in a config file
2637                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2638         } else {
2639                 foreach my $stylesheet (@stylesheets) {
2640                         next unless $stylesheet;
2641                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2642                 }
2643         }
2644         if (defined $project) {
2645                 my %href_params = get_feed_info();
2646                 if (!exists $href_params{'-title'}) {
2647                         $href_params{'-title'} = 'log';
2648                 }
2649
2650                 foreach my $format qw(RSS Atom) {
2651                         my $type = lc($format);
2652                         my %link_attr = (
2653                                 '-rel' => 'alternate',
2654                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2655                                 '-type' => "application/$type+xml"
2656                         );
2657
2658                         $href_params{'action'} = $type;
2659                         $link_attr{'-href'} = href(%href_params);
2660                         print "<link ".
2661                               "rel=\"$link_attr{'-rel'}\" ".
2662                               "title=\"$link_attr{'-title'}\" ".
2663                               "href=\"$link_attr{'-href'}\" ".
2664                               "type=\"$link_attr{'-type'}\" ".
2665                               "/>\n";
2666
2667                         $href_params{'extra_options'} = '--no-merges';
2668                         $link_attr{'-href'} = href(%href_params);
2669                         $link_attr{'-title'} .= ' (no merges)';
2670                         print "<link ".
2671                               "rel=\"$link_attr{'-rel'}\" ".
2672                               "title=\"$link_attr{'-title'}\" ".
2673                               "href=\"$link_attr{'-href'}\" ".
2674                               "type=\"$link_attr{'-type'}\" ".
2675                               "/>\n";
2676                 }
2677
2678         } else {
2679                 printf('<link rel="alternate" title="%s projects list" '.
2680                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2681                        $site_name, href(project=>undef, action=>"project_index"));
2682                 printf('<link rel="alternate" title="%s projects feeds" '.
2683                        'href="%s" type="text/x-opml" />'."\n",
2684                        $site_name, href(project=>undef, action=>"opml"));
2685         }
2686         if (defined $favicon) {
2687                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2688         }
2689
2690         print "</head>\n" .
2691               "<body>\n";
2692
2693         if (-f $site_header) {
2694                 open (my $fd, $site_header);
2695                 print <$fd>;
2696                 close $fd;
2697         }
2698
2699         print "<div class=\"page_header\">\n" .
2700               $cgi->a({-href => esc_url($logo_url),
2701                        -title => $logo_label},
2702                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2703         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2704         if (defined $project) {
2705                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2706                 if (defined $action) {
2707                         print " / $action";
2708                 }
2709                 print "\n";
2710         }
2711         print "</div>\n";
2712
2713         my ($have_search) = gitweb_check_feature('search');
2714         if (defined $project && $have_search) {
2715                 if (!defined $searchtext) {
2716                         $searchtext = "";
2717                 }
2718                 my $search_hash;
2719                 if (defined $hash_base) {
2720                         $search_hash = $hash_base;
2721                 } elsif (defined $hash) {
2722                         $search_hash = $hash;
2723                 } else {
2724                         $search_hash = "HEAD";
2725                 }
2726                 my $action = $my_uri;
2727                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2728                 if ($use_pathinfo) {
2729                         $action .= "/".esc_url($project);
2730                 }
2731                 print $cgi->startform(-method => "get", -action => $action) .
2732                       "<div class=\"search\">\n" .
2733                       (!$use_pathinfo &&
2734                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2735                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2736                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2737                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2738                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2739                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2740                       " search:\n",
2741                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2742                       "<span title=\"Extended regular expression\">" .
2743                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2744                                      -checked => $search_use_regexp) .
2745                       "</span>" .
2746                       "</div>" .
2747                       $cgi->end_form() . "\n";
2748         }
2749 }
2750
2751 sub git_footer_html {
2752         my $feed_class = 'rss_logo';
2753
2754         print "<div class=\"page_footer\">\n";
2755         if (defined $project) {
2756                 my $descr = git_get_project_description($project);
2757                 if (defined $descr) {
2758                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2759                 }
2760
2761                 my %href_params = get_feed_info();
2762                 if (!%href_params) {
2763                         $feed_class .= ' generic';
2764                 }
2765                 $href_params{'-title'} ||= 'log';
2766
2767                 foreach my $format qw(RSS Atom) {
2768                         $href_params{'action'} = lc($format);
2769                         print $cgi->a({-href => href(%href_params),
2770                                       -title => "$href_params{'-title'} $format feed",
2771                                       -class => $feed_class}, $format)."\n";
2772                 }
2773
2774         } else {
2775                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2776                               -class => $feed_class}, "OPML") . " ";
2777                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2778                               -class => $feed_class}, "TXT") . "\n";
2779         }
2780         print "</div>\n"; # class="page_footer"
2781
2782         if (-f $site_footer) {
2783                 open (my $fd, $site_footer);
2784                 print <$fd>;
2785                 close $fd;
2786         }
2787
2788         print "</body>\n" .
2789               "</html>";
2790 }
2791
2792 # die_error(<http_status_code>, <error_message>)
2793 # Example: die_error(404, 'Hash not found')
2794 # By convention, use the following status codes (as defined in RFC 2616):
2795 # 400: Invalid or missing CGI parameters, or
2796 #      requested object exists but has wrong type.
2797 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2798 #      this server or project.
2799 # 404: Requested object/revision/project doesn't exist.
2800 # 500: The server isn't configured properly, or
2801 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2802 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2803 sub die_error {
2804         my $status = shift || 500;
2805         my $error = shift || "Internal server error";
2806
2807         my %http_responses = (400 => '400 Bad Request',
2808                               403 => '403 Forbidden',
2809                               404 => '404 Not Found',
2810                               500 => '500 Internal Server Error');
2811         git_header_html($http_responses{$status});
2812         print <<EOF;
2813 <div class="page_body">
2814 <br /><br />
2815 $status - $error
2816 <br />
2817 </div>
2818 EOF
2819         git_footer_html();
2820         exit;
2821 }
2822
2823 ## ----------------------------------------------------------------------
2824 ## functions printing or outputting HTML: navigation
2825
2826 sub git_print_page_nav {
2827         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2828         $extra = '' if !defined $extra; # pager or formats
2829
2830         my @navs = qw(summary shortlog log commit commitdiff tree);
2831         if ($suppress) {
2832                 @navs = grep { $_ ne $suppress } @navs;
2833         }
2834
2835         my %arg = map { $_ => {action=>$_} } @navs;
2836         if (defined $head) {
2837                 for (qw(commit commitdiff)) {
2838                         $arg{$_}{'hash'} = $head;
2839                 }
2840                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2841                         for (qw(shortlog log)) {
2842                                 $arg{$_}{'hash'} = $head;
2843                         }
2844                 }
2845         }
2846         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2847         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2848
2849         print "<div class=\"page_nav\">\n" .
2850                 (join " | ",
2851                  map { $_ eq $current ?
2852                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2853                  } @navs);
2854         print "<br/>\n$extra<br/>\n" .
2855               "</div>\n";
2856 }
2857
2858 sub format_paging_nav {
2859         my ($action, $hash, $head, $page, $has_next_link) = @_;
2860         my $paging_nav;
2861
2862
2863         if ($hash ne $head || $page) {
2864                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2865         } else {
2866                 $paging_nav .= "HEAD";
2867         }
2868
2869         if ($page > 0) {
2870                 $paging_nav .= " &sdot; " .
2871                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2872                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2873         } else {
2874                 $paging_nav .= " &sdot; prev";
2875         }
2876
2877         if ($has_next_link) {
2878                 $paging_nav .= " &sdot; " .
2879                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2880                                  -accesskey => "n", -title => "Alt-n"}, "next");
2881         } else {
2882                 $paging_nav .= " &sdot; next";
2883         }
2884
2885         return $paging_nav;
2886 }
2887
2888 ## ......................................................................
2889 ## functions printing or outputting HTML: div
2890
2891 sub git_print_header_div {
2892         my ($action, $title, $hash, $hash_base) = @_;
2893         my %args = ();
2894
2895         $args{'action'} = $action;
2896         $args{'hash'} = $hash if $hash;
2897         $args{'hash_base'} = $hash_base if $hash_base;
2898
2899         print "<div class=\"header\">\n" .
2900               $cgi->a({-href => href(%args), -class => "title"},
2901               $title ? $title : $action) .
2902               "\n</div>\n";
2903 }
2904
2905 #sub git_print_authorship (\%) {
2906 sub git_print_authorship {
2907         my $co = shift;
2908
2909         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2910         print "<div class=\"author_date\">" .
2911               esc_html($co->{'author_name'}) .
2912               " [$ad{'rfc2822'}";
2913         if ($ad{'hour_local'} < 6) {
2914                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2915                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2916         } else {
2917                 printf(" (%02d:%02d %s)",
2918                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2919         }
2920         print "]</div>\n";
2921 }
2922
2923 sub git_print_page_path {
2924         my $name = shift;
2925         my $type = shift;
2926         my $hb = shift;
2927
2928
2929         print "<div class=\"page_path\">";
2930         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2931                       -title => 'tree root'}, to_utf8("[$project]"));
2932         print " / ";
2933         if (defined $name) {
2934                 my @dirname = split '/', $name;
2935                 my $basename = pop @dirname;
2936                 my $fullname = '';
2937
2938                 foreach my $dir (@dirname) {
2939                         $fullname .= ($fullname ? '/' : '') . $dir;
2940                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2941                                                      hash_base=>$hb),
2942                                       -title => $fullname}, esc_path($dir));
2943                         print " / ";
2944                 }
2945                 if (defined $type && $type eq 'blob') {
2946                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2947                                                      hash_base=>$hb),
2948                                       -title => $name}, esc_path($basename));
2949                 } elsif (defined $type && $type eq 'tree') {
2950                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2951                                                      hash_base=>$hb),
2952                                       -title => $name}, esc_path($basename));
2953                         print " / ";
2954                 } else {
2955                         print esc_path($basename);
2956                 }
2957         }
2958         print "<br/></div>\n";
2959 }
2960
2961 # sub git_print_log (\@;%) {
2962 sub git_print_log ($;%) {
2963         my $log = shift;
2964         my %opts = @_;
2965
2966         if ($opts{'-remove_title'}) {
2967                 # remove title, i.e. first line of log
2968                 shift @$log;
2969         }
2970         # remove leading empty lines
2971         while (defined $log->[0] && $log->[0] eq "") {
2972                 shift @$log;
2973         }
2974
2975         # print log
2976         my $signoff = 0;
2977         my $empty = 0;
2978         foreach my $line (@$log) {
2979                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2980                         $signoff = 1;
2981                         $empty = 0;
2982                         if (! $opts{'-remove_signoff'}) {
2983                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2984                                 next;
2985                         } else {
2986                                 # remove signoff lines
2987                                 next;
2988                         }
2989                 } else {
2990                         $signoff = 0;
2991                 }
2992
2993                 # print only one empty line
2994                 # do not print empty line after signoff
2995                 if ($line eq "") {
2996                         next if ($empty || $signoff);
2997                         $empty = 1;
2998                 } else {
2999                         $empty = 0;
3000                 }
3001
3002                 print format_log_line_html($line) . "<br/>\n";
3003         }
3004
3005         if ($opts{'-final_empty_line'}) {
3006                 # end with single empty line
3007                 print "<br/>\n" unless $empty;
3008         }
3009 }
3010
3011 # return link target (what link points to)
3012 sub git_get_link_target {
3013         my $hash = shift;
3014         my $link_target;
3015
3016         # read link
3017         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3018                 or return;
3019         {
3020                 local $/;
3021                 $link_target = <$fd>;
3022         }
3023         close $fd
3024                 or return;
3025
3026         return $link_target;
3027 }
3028
3029 # given link target, and the directory (basedir) the link is in,
3030 # return target of link relative to top directory (top tree);
3031 # return undef if it is not possible (including absolute links).
3032 sub normalize_link_target {
3033         my ($link_target, $basedir, $hash_base) = @_;
3034
3035         # we can normalize symlink target only if $hash_base is provided
3036         return unless $hash_base;
3037
3038         # absolute symlinks (beginning with '/') cannot be normalized
3039         return if (substr($link_target, 0, 1) eq '/');
3040
3041         # normalize link target to path from top (root) tree (dir)
3042         my $path;
3043         if ($basedir) {
3044                 $path = $basedir . '/' . $link_target;
3045         } else {
3046                 # we are in top (root) tree (dir)
3047                 $path = $link_target;
3048         }
3049
3050         # remove //, /./, and /../
3051         my @path_parts;
3052         foreach my $part (split('/', $path)) {
3053                 # discard '.' and ''
3054                 next if (!$part || $part eq '.');
3055                 # handle '..'
3056                 if ($part eq '..') {
3057                         if (@path_parts) {
3058                                 pop @path_parts;
3059                         } else {
3060                                 # link leads outside repository (outside top dir)
3061                                 return;
3062                         }
3063                 } else {
3064                         push @path_parts, $part;
3065                 }
3066         }
3067         $path = join('/', @path_parts);
3068
3069         return $path;
3070 }
3071
3072 # print tree entry (row of git_tree), but without encompassing <tr> element
3073 sub git_print_tree_entry {
3074         my ($t, $basedir, $hash_base, $have_blame) = @_;
3075
3076         my %base_key = ();
3077         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3078
3079         # The format of a table row is: mode list link.  Where mode is
3080         # the mode of the entry, list is the name of the entry, an href,
3081         # and link is the action links of the entry.
3082
3083         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3084         if ($t->{'type'} eq "blob") {
3085                 print "<td class=\"list\">" .
3086                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3087                                                file_name=>"$basedir$t->{'name'}", %base_key),
3088                                 -class => "list"}, esc_path($t->{'name'}));
3089                 if (S_ISLNK(oct $t->{'mode'})) {
3090                         my $link_target = git_get_link_target($t->{'hash'});
3091                         if ($link_target) {
3092                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3093                                 if (defined $norm_target) {
3094                                         print " -> " .
3095                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3096                                                                      file_name=>$norm_target),
3097                                                        -title => $norm_target}, esc_path($link_target));
3098                                 } else {
3099                                         print " -> " . esc_path($link_target);
3100                                 }
3101                         }
3102                 }
3103                 print "</td>\n";
3104                 print "<td class=\"link\">";
3105                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3106                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3107                               "blob");
3108                 if ($have_blame) {
3109                         print " | " .
3110                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3111                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3112                                       "blame");
3113                 }
3114                 if (defined $hash_base) {
3115                         print " | " .
3116                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3117                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3118                                       "history");
3119                 }
3120                 print " | " .
3121                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3122                                                file_name=>"$basedir$t->{'name'}")},
3123                                 "raw");
3124                 print "</td>\n";
3125
3126         } elsif ($t->{'type'} eq "tree") {
3127                 print "<td class=\"list\">";
3128                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3129                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3130                               esc_path($t->{'name'}));
3131                 print "</td>\n";
3132                 print "<td class=\"link\">";
3133                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3134                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3135                               "tree");
3136                 if (defined $hash_base) {
3137                         print " | " .
3138                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3139                                                      file_name=>"$basedir$t->{'name'}")},
3140                                       "history");
3141                 }
3142                 print "</td>\n";
3143         } else {
3144                 # unknown object: we can only present history for it
3145                 # (this includes 'commit' object, i.e. submodule support)
3146                 print "<td class=\"list\">" .
3147                       esc_path($t->{'name'}) .
3148                       "</td>\n";
3149                 print "<td class=\"link\">";
3150                 if (defined $hash_base) {
3151                         print $cgi->a({-href => href(action=>"history",
3152                                                      hash_base=>$hash_base,
3153                                                      file_name=>"$basedir$t->{'name'}")},
3154                                       "history");
3155                 }
3156                 print "</td>\n";
3157         }
3158 }
3159
3160 ## ......................................................................
3161 ## functions printing large fragments of HTML
3162
3163 # get pre-image filenames for merge (combined) diff
3164 sub fill_from_file_info {
3165         my ($diff, @parents) = @_;
3166
3167         $diff->{'from_file'} = [ ];
3168         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3169         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3170                 if ($diff->{'status'}[$i] eq 'R' ||
3171                     $diff->{'status'}[$i] eq 'C') {
3172                         $diff->{'from_file'}[$i] =
3173                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3174                 }
3175         }
3176
3177         return $diff;
3178 }
3179
3180 # is current raw difftree line of file deletion
3181 sub is_deleted {
3182         my $diffinfo = shift;
3183
3184         return $diffinfo->{'to_id'} eq ('0' x 40);
3185 }
3186
3187 # does patch correspond to [previous] difftree raw line
3188 # $diffinfo  - hashref of parsed raw diff format
3189 # $patchinfo - hashref of parsed patch diff format
3190 #              (the same keys as in $diffinfo)
3191 sub is_patch_split {
3192         my ($diffinfo, $patchinfo) = @_;
3193
3194         return defined $diffinfo && defined $patchinfo
3195                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3196 }
3197
3198
3199 sub git_difftree_body {
3200         my ($difftree, $hash, @parents) = @_;
3201         my ($parent) = $parents[0];
3202         my ($have_blame) = gitweb_check_feature('blame');
3203         print "<div class=\"list_head\">\n";
3204         if ($#{$difftree} > 10) {
3205                 print(($#{$difftree} + 1) . " files changed:\n");
3206         }
3207         print "</div>\n";
3208
3209         print "<table class=\"" .
3210               (@parents > 1 ? "combined " : "") .
3211               "diff_tree\">\n";
3212
3213         # header only for combined diff in 'commitdiff' view
3214         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3215         if ($has_header) {
3216                 # table header
3217                 print "<thead><tr>\n" .
3218                        "<th></th><th></th>\n"; # filename, patchN link
3219                 for (my $i = 0; $i < @parents; $i++) {
3220                         my $par = $parents[$i];
3221                         print "<th>" .
3222                               $cgi->a({-href => href(action=>"commitdiff",
3223                                                      hash=>$hash, hash_parent=>$par),
3224                                        -title => 'commitdiff to parent number ' .
3225                                                   ($i+1) . ': ' . substr($par,0,7)},
3226                                       $i+1) .
3227                               "&nbsp;</th>\n";
3228                 }
3229                 print "</tr></thead>\n<tbody>\n";
3230         }
3231
3232         my $alternate = 1;
3233         my $patchno = 0;
3234         foreach my $line (@{$difftree}) {
3235                 my $diff = parsed_difftree_line($line);
3236
3237                 if ($alternate) {
3238                         print "<tr class=\"dark\">\n";
3239                 } else {
3240                         print "<tr class=\"light\">\n";
3241                 }
3242                 $alternate ^= 1;
3243
3244                 if (exists $diff->{'nparents'}) { # combined diff
3245
3246                         fill_from_file_info($diff, @parents)
3247                                 unless exists $diff->{'from_file'};
3248
3249                         if (!is_deleted($diff)) {
3250                                 # file exists in the result (child) commit
3251                                 print "<td>" .
3252                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3253                                                              file_name=>$diff->{'to_file'},
3254                                                              hash_base=>$hash),
3255                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3256                                       "</td>\n";
3257                         } else {
3258                                 print "<td>" .
3259                                       esc_path($diff->{'to_file'}) .
3260                                       "</td>\n";
3261                         }
3262
3263                         if ($action eq 'commitdiff') {
3264                                 # link to patch
3265                                 $patchno++;
3266                                 print "<td class=\"link\">" .
3267                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3268                                       " | " .
3269                                       "</td>\n";
3270                         }
3271
3272                         my $has_history = 0;
3273                         my $not_deleted = 0;
3274                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3275                                 my $hash_parent = $parents[$i];
3276                                 my $from_hash = $diff->{'from_id'}[$i];
3277                                 my $from_path = $diff->{'from_file'}[$i];
3278                                 my $status = $diff->{'status'}[$i];
3279
3280                                 $has_history ||= ($status ne 'A');
3281                                 $not_deleted ||= ($status ne 'D');
3282
3283                                 if ($status eq 'A') {
3284                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3285                                 } elsif ($status eq 'D') {
3286                                         print "<td class=\"link\">" .
3287                                               $cgi->a({-href => href(action=>"blob",
3288                                                                      hash_base=>$hash,
3289                                                                      hash=>$from_hash,
3290                                                                      file_name=>$from_path)},
3291                                                       "blob" . ($i+1)) .
3292                                               " | </td>\n";
3293                                 } else {
3294                                         if ($diff->{'to_id'} eq $from_hash) {
3295                                                 print "<td class=\"link nochange\">";
3296                                         } else {
3297                                                 print "<td class=\"link\">";
3298                                         }
3299                                         print $cgi->a({-href => href(action=>"blobdiff",
3300                                                                      hash=>$diff->{'to_id'},
3301                                                                      hash_parent=>$from_hash,
3302                                                                      hash_base=>$hash,
3303                                                                      hash_parent_base=>$hash_parent,
3304                                                                      file_name=>$diff->{'to_file'},
3305                                                                      file_parent=>$from_path)},
3306                                                       "diff" . ($i+1)) .
3307                                               " | </td>\n";
3308                                 }
3309                         }
3310
3311                         print "<td class=\"link\">";
3312                         if ($not_deleted) {
3313                                 print $cgi->a({-href => href(action=>"blob",
3314                                                              hash=>$diff->{'to_id'},
3315                                                              file_name=>$diff->{'to_file'},
3316                                                              hash_base=>$hash)},
3317                                               "blob");
3318                                 print " | " if ($has_history);
3319                         }
3320                         if ($has_history) {
3321                                 print $cgi->a({-href => href(action=>"history",
3322                                                              file_name=>$diff->{'to_file'},
3323                                                              hash_base=>$hash)},
3324                                               "history");
3325                         }
3326                         print "</td>\n";
3327
3328                         print "</tr>\n";
3329                         next; # instead of 'else' clause, to avoid extra indent
3330                 }
3331                 # else ordinary diff
3332
3333                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3334                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3335                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3336                         $to_mode_oct = oct $diff->{'to_mode'};
3337                         if (S_ISREG($to_mode_oct)) { # only for regular file
3338                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3339                         }
3340                         $to_file_type = file_type($diff->{'to_mode'});
3341                 }
3342                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3343                         $from_mode_oct = oct $diff->{'from_mode'};
3344                         if (S_ISREG($to_mode_oct)) { # only for regular file
3345                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3346                         }
3347                         $from_file_type = file_type($diff->{'from_mode'});
3348                 }
3349
3350                 if ($diff->{'status'} eq "A") { # created
3351                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3352                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3353                         $mode_chng   .= "]</span>";
3354                         print "<td>";
3355                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3356                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3357                                       -class => "list"}, esc_path($diff->{'file'}));
3358                         print "</td>\n";
3359                         print "<td>$mode_chng</td>\n";
3360                         print "<td class=\"link\">";
3361                         if ($action eq 'commitdiff') {
3362                                 # link to patch
3363                                 $patchno++;
3364                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3365                                 print " | ";
3366                         }
3367                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3368                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3369                                       "blob");
3370                         print "</td>\n";
3371
3372                 } elsif ($diff->{'status'} eq "D") { # deleted
3373                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3374                         print "<td>";
3375                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3376                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3377                                        -class => "list"}, esc_path($diff->{'file'}));
3378                         print "</td>\n";
3379                         print "<td>$mode_chng</td>\n";
3380                         print "<td class=\"link\">";
3381                         if ($action eq 'commitdiff') {
3382                                 # link to patch
3383                                 $patchno++;
3384                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3385                                 print " | ";
3386                         }
3387                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3388                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3389                                       "blob") . " | ";
3390                         if ($have_blame) {
3391                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3392                                                              file_name=>$diff->{'file'})},
3393                                               "blame") . " | ";
3394                         }
3395                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3396                                                      file_name=>$diff->{'file'})},
3397                                       "history");
3398                         print "</td>\n";
3399
3400                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3401                         my $mode_chnge = "";
3402                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3403                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3404                                 if ($from_file_type ne $to_file_type) {
3405                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3406                                 }
3407                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3408                                         if ($from_mode_str && $to_mode_str) {
3409                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3410                                         } elsif ($to_mode_str) {
3411                                                 $mode_chnge .= " mode: $to_mode_str";
3412                                         }
3413                                 }
3414                                 $mode_chnge .= "]</span>\n";
3415                         }
3416                         print "<td>";
3417                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3418                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3419                                       -class => "list"}, esc_path($diff->{'file'}));
3420                         print "</td>\n";
3421                         print "<td>$mode_chnge</td>\n";
3422                         print "<td class=\"link\">";
3423                         if ($action eq 'commitdiff') {
3424                                 # link to patch
3425                                 $patchno++;
3426                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3427                                       " | ";
3428                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3429                                 # "commit" view and modified file (not onlu mode changed)
3430                                 print $cgi->a({-href => href(action=>"blobdiff",
3431                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3432                                                              hash_base=>$hash, hash_parent_base=>$parent,
3433                                                              file_name=>$diff->{'file'})},
3434                                               "diff") .
3435                                       " | ";
3436                         }
3437                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3438                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3439                                        "blob") . " | ";
3440                         if ($have_blame) {
3441                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3442                                                              file_name=>$diff->{'file'})},
3443                                               "blame") . " | ";
3444                         }
3445                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3446                                                      file_name=>$diff->{'file'})},
3447                                       "history");
3448                         print "</td>\n";
3449
3450                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3451                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3452                         my $nstatus = $status_name{$diff->{'status'}};
3453                         my $mode_chng = "";
3454                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3455                                 # mode also for directories, so we cannot use $to_mode_str
3456                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3457                         }
3458                         print "<td>" .
3459                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3460                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3461                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3462                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3463                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3464                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3465                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3466                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3467                               "<td class=\"link\">";
3468                         if ($action eq 'commitdiff') {
3469                                 # link to patch
3470                                 $patchno++;
3471                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3472                                       " | ";
3473                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3474                                 # "commit" view and modified file (not only pure rename or copy)
3475                                 print $cgi->a({-href => href(action=>"blobdiff",
3476                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3477                                                              hash_base=>$hash, hash_parent_base=>$parent,
3478                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3479                                               "diff") .
3480                                       " | ";
3481                         }
3482                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3483                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3484                                       "blob") . " | ";
3485                         if ($have_blame) {
3486                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3487                                                              file_name=>$diff->{'to_file'})},
3488                                               "blame") . " | ";
3489                         }
3490                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3491                                                     file_name=>$diff->{'to_file'})},
3492                                       "history");
3493                         print "</td>\n";
3494
3495                 } # we should not encounter Unmerged (U) or Unknown (X) status
3496                 print "</tr>\n";
3497         }
3498         print "</tbody>" if $has_header;
3499         print "</table>\n";
3500 }
3501
3502 sub git_patchset_body {
3503         my ($fd, $difftree, $hash, @hash_parents) = @_;
3504         my ($hash_parent) = $hash_parents[0];
3505
3506         my $is_combined = (@hash_parents > 1);
3507         my $patch_idx = 0;
3508         my $patch_number = 0;
3509         my $patch_line;
3510         my $diffinfo;
3511         my $to_name;
3512         my (%from, %to);
3513
3514         print "<div class=\"patchset\">\n";
3515
3516         # skip to first patch
3517         while ($patch_line = <$fd>) {
3518                 chomp $patch_line;
3519
3520                 last if ($patch_line =~ m/^diff /);
3521         }
3522
3523  PATCH:
3524         while ($patch_line) {
3525
3526                 # parse "git diff" header line
3527                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3528                         # $1 is from_name, which we do not use
3529                         $to_name = unquote($2);
3530                         $to_name =~ s!^b/!!;
3531                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3532                         # $1 is 'cc' or 'combined', which we do not use
3533                         $to_name = unquote($2);
3534                 } else {
3535                         $to_name = undef;
3536                 }
3537
3538                 # check if current patch belong to current raw line
3539                 # and parse raw git-diff line if needed
3540                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3541                         # this is continuation of a split patch
3542                         print "<div class=\"patch cont\">\n";
3543                 } else {
3544                         # advance raw git-diff output if needed
3545                         $patch_idx++ if defined $diffinfo;
3546
3547                         # read and prepare patch information
3548                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3549
3550                         # compact combined diff output can have some patches skipped
3551                         # find which patch (using pathname of result) we are at now;
3552                         if ($is_combined) {
3553                                 while ($to_name ne $diffinfo->{'to_file'}) {
3554                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3555                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3556                                               "</div>\n";  # class="patch"
3557
3558                                         $patch_idx++;
3559                                         $patch_number++;
3560
3561                                         last if $patch_idx > $#$difftree;
3562                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3563                                 }
3564                         }
3565
3566                         # modifies %from, %to hashes
3567                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3568
3569                         # this is first patch for raw difftree line with $patch_idx index
3570                         # we index @$difftree array from 0, but number patches from 1
3571                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3572                 }
3573
3574                 # git diff header
3575                 #assert($patch_line =~ m/^diff /) if DEBUG;
3576                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3577                 $patch_number++;
3578                 # print "git diff" header
3579                 print format_git_diff_header_line($patch_line, $diffinfo,
3580                                                   \%from, \%to);
3581
3582                 # print extended diff header
3583                 print "<div class=\"diff extended_header\">\n";
3584         EXTENDED_HEADER:
3585                 while ($patch_line = <$fd>) {
3586                         chomp $patch_line;
3587
3588                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3589
3590                         print format_extended_diff_header_line($patch_line, $diffinfo,
3591                                                                \%from, \%to);
3592                 }
3593                 print "</div>\n"; # class="diff extended_header"
3594
3595                 # from-file/to-file diff header
3596                 if (! $patch_line) {
3597                         print "</div>\n"; # class="patch"
3598                         last PATCH;
3599                 }
3600                 next PATCH if ($patch_line =~ m/^diff /);
3601                 #assert($patch_line =~ m/^---/) if DEBUG;
3602
3603                 my $last_patch_line = $patch_line;
3604                 $patch_line = <$fd>;
3605                 chomp $patch_line;
3606                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3607
3608                 print format_diff_from_to_header($last_patch_line, $patch_line,
3609                                                  $diffinfo, \%from, \%to,
3610                                                  @hash_parents);
3611
3612                 # the patch itself
3613         LINE:
3614                 while ($patch_line = <$fd>) {
3615                         chomp $patch_line;
3616
3617                         next PATCH if ($patch_line =~ m/^diff /);
3618
3619                         print format_diff_line($patch_line, \%from, \%to);
3620                 }
3621
3622         } continue {
3623                 print "</div>\n"; # class="patch"
3624         }
3625
3626         # for compact combined (--cc) format, with chunk and patch simpliciaction
3627         # patchset might be empty, but there might be unprocessed raw lines
3628         for (++$patch_idx if $patch_number > 0;
3629              $patch_idx < @$difftree;
3630              ++$patch_idx) {
3631                 # read and prepare patch information
3632                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3633
3634                 # generate anchor for "patch" links in difftree / whatchanged part
3635                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3636                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3637                       "</div>\n";  # class="patch"
3638
3639                 $patch_number++;
3640         }
3641
3642         if ($patch_number == 0) {
3643                 if (@hash_parents > 1) {
3644                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3645                 } else {
3646                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3647                 }
3648         }
3649
3650         print "</div>\n"; # class="patchset"
3651 }
3652
3653 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3654
3655 # fills project list info (age, description, owner, forks) for each
3656 # project in the list, removing invalid projects from returned list
3657 # NOTE: modifies $projlist, but does not remove entries from it
3658 sub fill_project_list_info {
3659         my ($projlist, $check_forks) = @_;
3660         my @projects;
3661
3662         my $show_ctags = gitweb_check_feature('ctags');
3663  PROJECT:
3664         foreach my $pr (@$projlist) {
3665                 my (@activity) = git_get_last_activity($pr->{'path'});
3666                 unless (@activity) {
3667                         next PROJECT;
3668                 }
3669                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3670                 if (!defined $pr->{'descr'}) {
3671                         my $descr = git_get_project_description($pr->{'path'}) || "";
3672                         $descr = to_utf8($descr);
3673                         $pr->{'descr_long'} = $descr;
3674                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3675                 }
3676                 if (!defined $pr->{'owner'}) {
3677                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3678                 }
3679                 if ($check_forks) {
3680                         my $pname = $pr->{'path'};
3681                         if (($pname =~ s/\.git$//) &&
3682                             ($pname !~ /\/$/) &&
3683                             (-d "$projectroot/$pname")) {
3684                                 $pr->{'forks'} = "-d $projectroot/$pname";
3685                         }       else {
3686                                 $pr->{'forks'} = 0;
3687                         }
3688                 }
3689                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3690                 push @projects, $pr;
3691         }
3692
3693         return @projects;
3694 }
3695
3696 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3697 # (changing $list), or generating 'sort by $name' replay link otherwise
3698 sub print_sort_th {
3699         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3700         $key    ||= $name;
3701         $header ||= ucfirst($name);
3702
3703         if ($order eq $name) {
3704                 if ($str_sort) {
3705                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3706                 } else {
3707                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3708                 }
3709                 print "<th>$header</th>\n";
3710         } else {
3711                 print "<th>" .
3712                       $cgi->a({-href => href(-replay=>1, order=>$name),
3713                                -class => "header"}, $header) .
3714                       "</th>\n";
3715         }
3716 }
3717
3718 sub print_sort_th_str {
3719         print_sort_th(1, @_);
3720 }
3721
3722 sub print_sort_th_num {
3723         print_sort_th(0, @_);
3724 }
3725
3726 sub git_project_list_body {
3727         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3728
3729         my ($check_forks) = gitweb_check_feature('forks');
3730         my @projects = fill_project_list_info($projlist, $check_forks);
3731
3732         $order ||= $default_projects_order;
3733         $from = 0 unless defined $from;
3734         $to = $#projects if (!defined $to || $#projects < $to);
3735
3736         my $show_ctags = gitweb_check_feature('ctags');
3737         if ($show_ctags) {
3738                 my %ctags;
3739                 foreach my $p (@projects) {
3740                         foreach my $ct (keys %{$p->{'ctags'}}) {
3741                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3742                         }
3743                 }
3744                 my $cloud = git_populate_project_tagcloud(\%ctags);
3745                 print git_show_project_tagcloud($cloud, 64);
3746         }
3747
3748         print "<table class=\"project_list\">\n";
3749         unless ($no_header) {
3750                 print "<tr>\n";
3751                 if ($check_forks) {
3752                         print "<th></th>\n";
3753                 }
3754                 print_sort_th_str('project', $order, 'path',
3755                                   'Project', \@projects);
3756                 print_sort_th_str('descr', $order, 'descr_long',
3757                                   'Description', \@projects);
3758                 print_sort_th_str('owner', $order, 'owner',
3759                                   'Owner', \@projects);
3760                 print_sort_th_num('age', $order, 'age',
3761                                   'Last Change', \@projects);
3762                 print "<th></th>\n" . # for links
3763                       "</tr>\n";
3764         }
3765         my $alternate = 1;
3766         my $tagfilter = $cgi->param('by_tag');
3767         for (my $i = $from; $i <= $to; $i++) {
3768                 my $pr = $projects[$i];
3769                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3770                 if ($alternate) {
3771                         print "<tr class=\"dark\">\n";
3772                 } else {
3773                         print "<tr class=\"light\">\n";
3774                 }
3775                 $alternate ^= 1;
3776                 if ($check_forks) {
3777                         print "<td>";
3778                         if ($pr->{'forks'}) {
3779                                 print "<!-- $pr->{'forks'} -->\n";
3780                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3781                         }
3782                         print "</td>\n";
3783                 }
3784                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3785                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3786                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3787                                         -class => "list", -title => $pr->{'descr_long'}},
3788                                         esc_html($pr->{'descr'})) . "</td>\n" .
3789                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3790                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3791                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3792                       "<td class=\"link\">" .
3793                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3794                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3795                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3796                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3797                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3798                       "</td>\n" .
3799                       "</tr>\n";
3800         }
3801         if (defined $extra) {
3802                 print "<tr>\n";
3803                 if ($check_forks) {
3804                         print "<td></td>\n";
3805                 }
3806                 print "<td colspan=\"5\">$extra</td>\n" .
3807                       "</tr>\n";
3808         }
3809         print "</table>\n";
3810 }
3811
3812 sub git_shortlog_body {
3813         # uses global variable $project
3814         my ($commitlist, $from, $to, $refs, $extra) = @_;
3815
3816         $from = 0 unless defined $from;
3817         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3818
3819         print "<table class=\"shortlog\">\n";
3820         my $alternate = 1;
3821         for (my $i = $from; $i <= $to; $i++) {
3822                 my %co = %{$commitlist->[$i]};
3823                 my $commit = $co{'id'};
3824                 my $ref = format_ref_marker($refs, $commit);
3825                 if ($alternate) {
3826                         print "<tr class=\"dark\">\n";
3827                 } else {
3828                         print "<tr class=\"light\">\n";
3829                 }
3830                 $alternate ^= 1;
3831                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3832                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3833                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3834                       "<td><i>" . $author . "</i></td>\n" .
3835                       "<td>";
3836                 print format_subject_html($co{'title'}, $co{'title_short'},
3837                                           href(action=>"commit", hash=>$commit), $ref);
3838                 print "</td>\n" .
3839                       "<td class=\"link\">" .
3840                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3841                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3842                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3843                 my $snapshot_links = format_snapshot_links($commit);
3844                 if (defined $snapshot_links) {
3845                         print " | " . $snapshot_links;
3846                 }
3847                 print "</td>\n" .
3848                       "</tr>\n";
3849         }
3850         if (defined $extra) {
3851                 print "<tr>\n" .
3852                       "<td colspan=\"4\">$extra</td>\n" .
3853                       "</tr>\n";
3854         }
3855         print "</table>\n";
3856 }
3857
3858 sub git_history_body {
3859         # Warning: assumes constant type (blob or tree) during history
3860         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3861
3862         $from = 0 unless defined $from;
3863         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3864
3865         print "<table class=\"history\">\n";
3866         my $alternate = 1;
3867         for (my $i = $from; $i <= $to; $i++) {
3868                 my %co = %{$commitlist->[$i]};
3869                 if (!%co) {
3870                         next;
3871                 }
3872                 my $commit = $co{'id'};
3873
3874                 my $ref = format_ref_marker($refs, $commit);
3875
3876                 if ($alternate) {
3877                         print "<tr class=\"dark\">\n";
3878                 } else {
3879                         print "<tr class=\"light\">\n";
3880                 }
3881                 $alternate ^= 1;
3882         # shortlog uses      chop_str($co{'author_name'}, 10)
3883                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3884                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3885                       "<td><i>" . $author . "</i></td>\n" .
3886                       "<td>";
3887                 # originally git_history used chop_str($co{'title'}, 50)
3888                 print format_subject_html($co{'title'}, $co{'title_short'},
3889                                           href(action=>"commit", hash=>$commit), $ref);
3890                 print "</td>\n" .
3891                       "<td class=\"link\">" .
3892                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3893                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3894
3895                 if ($ftype eq 'blob') {
3896                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3897                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3898                         if (defined $blob_current && defined $blob_parent &&
3899                                         $blob_current ne $blob_parent) {
3900                                 print " | " .
3901                                         $cgi->a({-href => href(action=>"blobdiff",
3902                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3903                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3904                                                                file_name=>$file_name)},
3905                                                 "diff to current");
3906                         }
3907                 }
3908                 print "</td>\n" .
3909                       "</tr>\n";
3910         }
3911         if (defined $extra) {
3912                 print "<tr>\n" .
3913                       "<td colspan=\"4\">$extra</td>\n" .
3914                       "</tr>\n";
3915         }
3916         print "</table>\n";
3917 }
3918
3919 sub git_tags_body {
3920         # uses global variable $project
3921         my ($taglist, $from, $to, $extra) = @_;
3922         $from = 0 unless defined $from;
3923         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3924
3925         print "<table class=\"tags\">\n";
3926         my $alternate = 1;
3927         for (my $i = $from; $i <= $to; $i++) {
3928                 my $entry = $taglist->[$i];
3929                 my %tag = %$entry;
3930                 my $comment = $tag{'subject'};
3931                 my $comment_short;
3932                 if (defined $comment) {
3933                         $comment_short = chop_str($comment, 30, 5);
3934                 }
3935                 if ($alternate) {
3936                         print "<tr class=\"dark\">\n";
3937                 } else {
3938                         print "<tr class=\"light\">\n";
3939                 }
3940                 $alternate ^= 1;
3941                 if (defined $tag{'age'}) {
3942                         print "<td><i>$tag{'age'}</i></td>\n";
3943                 } else {
3944                         print "<td></td>\n";
3945                 }
3946                 print "<td>" .
3947                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3948                                -class => "list name"}, esc_html($tag{'name'})) .
3949                       "</td>\n" .
3950                       "<td>";
3951                 if (defined $comment) {
3952                         print format_subject_html($comment, $comment_short,
3953                                                   href(action=>"tag", hash=>$tag{'id'}));
3954                 }
3955                 print "</td>\n" .
3956                       "<td class=\"selflink\">";
3957                 if ($tag{'type'} eq "tag") {
3958                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3959                 } else {
3960                         print "&nbsp;";
3961                 }
3962                 print "</td>\n" .
3963                       "<td class=\"link\">" . " | " .
3964                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3965                 if ($tag{'reftype'} eq "commit") {
3966                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3967                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3968                 } elsif ($tag{'reftype'} eq "blob") {
3969                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3970                 }
3971                 print "</td>\n" .
3972                       "</tr>";
3973         }
3974         if (defined $extra) {
3975                 print "<tr>\n" .
3976                       "<td colspan=\"5\">$extra</td>\n" .
3977                       "</tr>\n";
3978         }
3979         print "</table>\n";
3980 }
3981
3982 sub git_heads_body {
3983         # uses global variable $project
3984         my ($headlist, $head, $from, $to, $extra) = @_;
3985         $from = 0 unless defined $from;
3986         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3987
3988         print "<table class=\"heads\">\n";
3989         my $alternate = 1;
3990         for (my $i = $from; $i <= $to; $i++) {
3991                 my $entry = $headlist->[$i];
3992                 my %ref = %$entry;
3993                 my $curr = $ref{'id'} eq $head;
3994                 if ($alternate) {
3995                         print "<tr class=\"dark\">\n";
3996                 } else {
3997                         print "<tr class=\"light\">\n";
3998                 }
3999                 $alternate ^= 1;
4000                 print "<td><i>$ref{'age'}</i></td>\n" .
4001                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4002                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4003                                -class => "list name"},esc_html($ref{'name'})) .
4004                       "</td>\n" .
4005                       "<td class=\"link\">" .
4006                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4007                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4008                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4009                       "</td>\n" .
4010                       "</tr>";
4011         }
4012         if (defined $extra) {
4013                 print "<tr>\n" .
4014                       "<td colspan=\"3\">$extra</td>\n" .
4015                       "</tr>\n";
4016         }
4017         print "</table>\n";
4018 }
4019
4020 sub git_search_grep_body {
4021         my ($commitlist, $from, $to, $extra) = @_;
4022         $from = 0 unless defined $from;
4023         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4024
4025         print "<table class=\"commit_search\">\n";
4026         my $alternate = 1;
4027         for (my $i = $from; $i <= $to; $i++) {
4028                 my %co = %{$commitlist->[$i]};
4029                 if (!%co) {
4030                         next;
4031                 }
4032                 my $commit = $co{'id'};
4033                 if ($alternate) {
4034                         print "<tr class=\"dark\">\n";
4035                 } else {
4036                         print "<tr class=\"light\">\n";
4037                 }
4038                 $alternate ^= 1;
4039                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4040                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4041                       "<td><i>" . $author . "</i></td>\n" .
4042                       "<td>" .
4043                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4044                                -class => "list subject"},
4045                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4046                 my $comment = $co{'comment'};
4047                 foreach my $line (@$comment) {
4048                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4049                                 my ($lead, $match, $trail) = ($1, $2, $3);
4050                                 $match = chop_str($match, 70, 5, 'center');
4051                                 my $contextlen = int((80 - length($match))/2);
4052                                 $contextlen = 30 if ($contextlen > 30);
4053                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4054                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4055
4056                                 $lead  = esc_html($lead);
4057                                 $match = esc_html($match);
4058                                 $trail = esc_html($trail);
4059
4060                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4061                         }
4062                 }
4063                 print "</td>\n" .
4064                       "<td class=\"link\">" .
4065                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4066                       " | " .
4067                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4068                       " | " .
4069                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4070                 print "</td>\n" .
4071                       "</tr>\n";
4072         }
4073         if (defined $extra) {
4074                 print "<tr>\n" .
4075                       "<td colspan=\"3\">$extra</td>\n" .
4076                       "</tr>\n";
4077         }
4078         print "</table>\n";
4079 }
4080
4081 ## ======================================================================
4082 ## ======================================================================
4083 ## actions
4084
4085 sub git_project_list {
4086         my $order = $cgi->param('o');
4087         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4088                 die_error(400, "Unknown order parameter");
4089         }
4090
4091         my @list = git_get_projects_list();
4092         if (!@list) {
4093                 die_error(404, "No projects found");
4094         }
4095
4096         git_header_html();
4097         if (-f $home_text) {
4098                 print "<div class=\"index_include\">\n";
4099                 open (my $fd, $home_text);
4100                 print <$fd>;
4101                 close $fd;
4102                 print "</div>\n";
4103         }
4104         git_project_list_body(\@list, $order);
4105         git_footer_html();
4106 }
4107
4108 sub git_forks {
4109         my $order = $cgi->param('o');
4110         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4111                 die_error(400, "Unknown order parameter");
4112         }
4113
4114         my @list = git_get_projects_list($project);
4115         if (!@list) {
4116                 die_error(404, "No forks found");
4117         }
4118
4119         git_header_html();
4120         git_print_page_nav('','');
4121         git_print_header_div('summary', "$project forks");
4122         git_project_list_body(\@list, $order);
4123         git_footer_html();
4124 }
4125
4126 sub git_project_index {
4127         my @projects = git_get_projects_list($project);
4128
4129         print $cgi->header(
4130                 -type => 'text/plain',
4131                 -charset => 'utf-8',
4132                 -content_disposition => 'inline; filename="index.aux"');
4133
4134         foreach my $pr (@projects) {
4135                 if (!exists $pr->{'owner'}) {
4136                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4137                 }
4138
4139                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4140                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4141                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4142                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4143                 $path  =~ s/ /\+/g;
4144                 $owner =~ s/ /\+/g;
4145
4146                 print "$path $owner\n";
4147         }
4148 }
4149
4150 sub git_summary {
4151         my $descr = git_get_project_description($project) || "none";
4152         my %co = parse_commit("HEAD");
4153         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4154         my $head = $co{'id'};
4155
4156         my $owner = git_get_project_owner($project);
4157
4158         my $refs = git_get_references();
4159         # These get_*_list functions return one more to allow us to see if
4160         # there are more ...
4161         my @taglist  = git_get_tags_list(16);
4162         my @headlist = git_get_heads_list(16);
4163         my @forklist;
4164         my ($check_forks) = gitweb_check_feature('forks');
4165
4166         if ($check_forks) {
4167                 @forklist = git_get_projects_list($project);
4168         }
4169
4170         git_header_html();
4171         git_print_page_nav('summary','', $head);
4172
4173         print "<div class=\"title\">&nbsp;</div>\n";
4174         print "<table class=\"projects_list\">\n" .
4175               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4176               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4177         if (defined $cd{'rfc2822'}) {
4178                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4179         }
4180
4181         # use per project git URL list in $projectroot/$project/cloneurl
4182         # or make project git URL from git base URL and project name
4183         my $url_tag = "URL";
4184         my @url_list = git_get_project_url_list($project);
4185         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4186         foreach my $git_url (@url_list) {
4187                 next unless $git_url;
4188                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4189                 $url_tag = "";
4190         }
4191
4192         # Tag cloud
4193         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4194         if ($show_ctags) {
4195                 my $ctags = git_get_project_ctags($project);
4196                 my $cloud = git_populate_project_tagcloud($ctags);
4197                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4198                 print "</td>\n<td>" unless %$ctags;
4199                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4200                 print "</td>\n<td>" if %$ctags;
4201                 print git_show_project_tagcloud($cloud, 48);
4202                 print "</td></tr>";
4203         }
4204
4205         print "</table>\n";
4206
4207         if (-s "$projectroot/$project/README.html") {
4208                 if (open my $fd, "$projectroot/$project/README.html") {
4209                         print "<div class=\"title\">readme</div>\n" .
4210                               "<div class=\"readme\">\n";
4211                         print $_ while (<$fd>);
4212                         print "\n</div>\n"; # class="readme"
4213                         close $fd;
4214                 }
4215         }
4216
4217         # we need to request one more than 16 (0..15) to check if
4218         # those 16 are all
4219         my @commitlist = $head ? parse_commits($head, 17) : ();
4220         if (@commitlist) {
4221                 git_print_header_div('shortlog');
4222                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4223                                   $#commitlist <=  15 ? undef :
4224                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4225         }
4226
4227         if (@taglist) {
4228                 git_print_header_div('tags');
4229                 git_tags_body(\@taglist, 0, 15,
4230                               $#taglist <=  15 ? undef :
4231                               $cgi->a({-href => href(action=>"tags")}, "..."));
4232         }
4233
4234         if (@headlist) {
4235                 git_print_header_div('heads');
4236                 git_heads_body(\@headlist, $head, 0, 15,
4237                                $#headlist <= 15 ? undef :
4238                                $cgi->a({-href => href(action=>"heads")}, "..."));
4239         }
4240
4241         if (@forklist) {
4242                 git_print_header_div('forks');
4243                 git_project_list_body(\@forklist, undef, 0, 15,
4244                                       $#forklist <= 15 ? undef :
4245                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4246                                       'noheader');
4247         }
4248
4249         git_footer_html();
4250 }
4251
4252 sub git_tag {
4253         my $head = git_get_head_hash($project);
4254         git_header_html();
4255         git_print_page_nav('','', $head,undef,$head);
4256         my %tag = parse_tag($hash);
4257
4258         if (! %tag) {
4259                 die_error(404, "Unknown tag object");
4260         }
4261
4262         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4263         print "<div class=\"title_text\">\n" .
4264               "<table class=\"object_header\">\n" .
4265               "<tr>\n" .
4266               "<td>object</td>\n" .
4267               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4268                                $tag{'object'}) . "</td>\n" .
4269               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4270                                               $tag{'type'}) . "</td>\n" .
4271               "</tr>\n";
4272         if (defined($tag{'author'})) {
4273                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4274                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4275                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4276                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4277                         "</td></tr>\n";
4278         }
4279         print "</table>\n\n" .
4280               "</div>\n";
4281         print "<div class=\"page_body\">";
4282         my $comment = $tag{'comment'};
4283         foreach my $line (@$comment) {
4284                 chomp $line;
4285                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4286         }
4287         print "</div>\n";
4288         git_footer_html();
4289 }
4290
4291 sub git_blame {
4292         my $fd;
4293         my $ftype;
4294
4295         gitweb_check_feature('blame')
4296             or die_error(403, "Blame view not allowed");
4297
4298         die_error(400, "No file name given") unless $file_name;
4299         $hash_base ||= git_get_head_hash($project);
4300         die_error(404, "Couldn't find base commit") unless ($hash_base);
4301         my %co = parse_commit($hash_base)
4302                 or die_error(404, "Commit not found");
4303         if (!defined $hash) {
4304                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4305                         or die_error(404, "Error looking up file");
4306         }
4307         $ftype = git_get_type($hash);
4308         if ($ftype !~ "blob") {
4309                 die_error(400, "Object is not a blob");
4310         }
4311         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4312               $file_name, $hash_base)
4313                 or die_error(500, "Open git-blame failed");
4314         git_header_html();
4315         my $formats_nav =
4316                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4317                         "blob") .
4318                 " | " .
4319                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4320                         "history") .
4321                 " | " .
4322                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4323                         "HEAD");
4324         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4325         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4326         git_print_page_path($file_name, $ftype, $hash_base);
4327         my @rev_color = (qw(light2 dark2));
4328         my $num_colors = scalar(@rev_color);
4329         my $current_color = 0;
4330         my $last_rev;
4331         print <<HTML;
4332 <div class="page_body">
4333 <table class="blame">
4334 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4335 HTML
4336         my %metainfo = ();
4337         while (1) {
4338                 $_ = <$fd>;
4339                 last unless defined $_;
4340                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4341                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4342                 if (!exists $metainfo{$full_rev}) {
4343                         $metainfo{$full_rev} = {};
4344                 }
4345                 my $meta = $metainfo{$full_rev};
4346                 while (<$fd>) {
4347                         last if (s/^\t//);
4348                         if (/^(\S+) (.*)$/) {
4349                                 $meta->{$1} = $2;
4350                         }
4351                 }
4352                 my $data = $_;
4353                 chomp $data;
4354                 my $rev = substr($full_rev, 0, 8);
4355                 my $author = $meta->{'author'};
4356                 my %date = parse_date($meta->{'author-time'},
4357                                       $meta->{'author-tz'});
4358                 my $date = $date{'iso-tz'};
4359                 if ($group_size) {
4360                         $current_color = ++$current_color % $num_colors;
4361                 }
4362                 print "<tr class=\"$rev_color[$current_color]\">\n";
4363                 if ($group_size) {
4364                         print "<td class=\"sha1\"";
4365                         print " title=\"". esc_html($author) . ", $date\"";
4366                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4367                         print ">";
4368                         print $cgi->a({-href => href(action=>"commit",
4369                                                      hash=>$full_rev,
4370                                                      file_name=>$file_name)},
4371                                       esc_html($rev));
4372                         print "</td>\n";
4373                 }
4374                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4375                         or die_error(500, "Open git-rev-parse failed");
4376                 my $parent_commit = <$dd>;
4377                 close $dd;
4378                 chomp($parent_commit);
4379                 my $blamed = href(action => 'blame',
4380                                   file_name => $meta->{'filename'},
4381                                   hash_base => $parent_commit);
4382                 print "<td class=\"linenr\">";
4383                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4384                                 -id => "l$lineno",
4385                                 -class => "linenr" },
4386                               esc_html($lineno));
4387                 print "</td>";
4388                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4389                 print "</tr>\n";
4390         }
4391         print "</table>\n";
4392         print "</div>";
4393         close $fd
4394                 or print "Reading blob failed\n";
4395         git_footer_html();
4396 }
4397
4398 sub git_tags {
4399         my $head = git_get_head_hash($project);
4400         git_header_html();
4401         git_print_page_nav('','', $head,undef,$head);
4402         git_print_header_div('summary', $project);
4403
4404         my @tagslist = git_get_tags_list();
4405         if (@tagslist) {
4406                 git_tags_body(\@tagslist);
4407         }
4408         git_footer_html();
4409 }
4410
4411 sub git_heads {
4412         my $head = git_get_head_hash($project);
4413         git_header_html();
4414         git_print_page_nav('','', $head,undef,$head);
4415         git_print_header_div('summary', $project);
4416
4417         my @headslist = git_get_heads_list();
4418         if (@headslist) {
4419                 git_heads_body(\@headslist, $head);
4420         }
4421         git_footer_html();
4422 }
4423
4424 sub git_blob_plain {
4425         my $type = shift;
4426         my $expires;
4427
4428         if (!defined $hash) {
4429                 if (defined $file_name) {
4430                         my $base = $hash_base || git_get_head_hash($project);
4431                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4432                                 or die_error(404, "Cannot find file");
4433                 } else {
4434                         die_error(400, "No file name defined");
4435                 }
4436         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4437                 # blobs defined by non-textual hash id's can be cached
4438                 $expires = "+1d";
4439         }
4440
4441         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4442                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4443
4444         # content-type (can include charset)
4445         $type = blob_contenttype($fd, $file_name, $type);
4446
4447         # "save as" filename, even when no $file_name is given
4448         my $save_as = "$hash";
4449         if (defined $file_name) {
4450                 $save_as = $file_name;
4451         } elsif ($type =~ m/^text\//) {
4452                 $save_as .= '.txt';
4453         }
4454
4455         print $cgi->header(
4456                 -type => $type,
4457                 -expires => $expires,
4458                 -content_disposition => 'inline; filename="' . $save_as . '"');
4459         undef $/;
4460         binmode STDOUT, ':raw';
4461         print <$fd>;
4462         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4463         $/ = "\n";
4464         close $fd;
4465 }
4466
4467 sub git_blob {
4468         my $expires;
4469
4470         if (!defined $hash) {
4471                 if (defined $file_name) {
4472                         my $base = $hash_base || git_get_head_hash($project);
4473                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4474                                 or die_error(404, "Cannot find file");
4475                 } else {
4476                         die_error(400, "No file name defined");
4477                 }
4478         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4479                 # blobs defined by non-textual hash id's can be cached
4480                 $expires = "+1d";
4481         }
4482
4483         my ($have_blame) = gitweb_check_feature('blame');
4484         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4485                 or die_error(500, "Couldn't cat $file_name, $hash");
4486         my $mimetype = blob_mimetype($fd, $file_name);
4487         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4488                 close $fd;
4489                 return git_blob_plain($mimetype);
4490         }
4491         # we can have blame only for text/* mimetype
4492         $have_blame &&= ($mimetype =~ m!^text/!);
4493
4494         git_header_html(undef, $expires);
4495         my $formats_nav = '';
4496         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4497                 if (defined $file_name) {
4498                         if ($have_blame) {
4499                                 $formats_nav .=
4500                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4501                                                 "blame") .
4502                                         " | ";
4503                         }
4504                         $formats_nav .=
4505                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4506                                         "history") .
4507                                 " | " .
4508                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4509                                         "raw") .
4510                                 " | " .
4511                                 $cgi->a({-href => href(action=>"blob",
4512                                                        hash_base=>"HEAD", file_name=>$file_name)},
4513                                         "HEAD");
4514                 } else {
4515                         $formats_nav .=
4516                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4517                                         "raw");
4518                 }
4519                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4520                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4521         } else {
4522                 print "<div class=\"page_nav\">\n" .
4523                       "<br/><br/></div>\n" .
4524                       "<div class=\"title\">$hash</div>\n";
4525         }
4526         git_print_page_path($file_name, "blob", $hash_base);
4527         print "<div class=\"page_body\">\n";
4528         if ($mimetype =~ m!^image/!) {
4529                 print qq!<img type="$mimetype"!;
4530                 if ($file_name) {
4531                         print qq! alt="$file_name" title="$file_name"!;
4532                 }
4533                 print qq! src="! .
4534                       href(action=>"blob_plain", hash=>$hash,
4535                            hash_base=>$hash_base, file_name=>$file_name) .
4536                       qq!" />\n!;
4537         } else {
4538                 my $nr;
4539                 while (my $line = <$fd>) {
4540                         chomp $line;
4541                         $nr++;
4542                         $line = untabify($line);
4543                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4544                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4545                 }
4546         }
4547         close $fd
4548                 or print "Reading blob failed.\n";
4549         print "</div>";
4550         git_footer_html();
4551 }
4552
4553 sub git_tree {
4554         if (!defined $hash_base) {
4555                 $hash_base = "HEAD";
4556         }
4557         if (!defined $hash) {
4558                 if (defined $file_name) {
4559                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4560                 } else {
4561                         $hash = $hash_base;
4562                 }
4563         }
4564         die_error(404, "No such tree") unless defined($hash);
4565         $/ = "\0";
4566         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4567                 or die_error(500, "Open git-ls-tree failed");
4568         my @entries = map { chomp; $_ } <$fd>;
4569         close $fd or die_error(404, "Reading tree failed");
4570         $/ = "\n";
4571
4572         my $refs = git_get_references();
4573         my $ref = format_ref_marker($refs, $hash_base);
4574         git_header_html();
4575         my $basedir = '';
4576         my ($have_blame) = gitweb_check_feature('blame');
4577         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4578                 my @views_nav = ();
4579                 if (defined $file_name) {
4580                         push @views_nav,
4581                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4582                                         "history"),
4583                                 $cgi->a({-href => href(action=>"tree",
4584                                                        hash_base=>"HEAD", file_name=>$file_name)},
4585                                         "HEAD"),
4586                 }
4587                 my $snapshot_links = format_snapshot_links($hash);
4588                 if (defined $snapshot_links) {
4589                         # FIXME: Should be available when we have no hash base as well.
4590                         push @views_nav, $snapshot_links;
4591                 }
4592                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4593                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4594         } else {
4595                 undef $hash_base;
4596                 print "<div class=\"page_nav\">\n";
4597                 print "<br/><br/></div>\n";
4598                 print "<div class=\"title\">$hash</div>\n";
4599         }
4600         if (defined $file_name) {
4601                 $basedir = $file_name;
4602                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4603                         $basedir .= '/';
4604                 }
4605                 git_print_page_path($file_name, 'tree', $hash_base);
4606         }
4607         print "<div class=\"page_body\">\n";
4608         print "<table class=\"tree\">\n";
4609         my $alternate = 1;
4610         # '..' (top directory) link if possible
4611         if (defined $hash_base &&
4612             defined $file_name && $file_name =~ m![^/]+$!) {
4613                 if ($alternate) {
4614                         print "<tr class=\"dark\">\n";
4615                 } else {
4616                         print "<tr class=\"light\">\n";
4617                 }
4618                 $alternate ^= 1;
4619
4620                 my $up = $file_name;
4621                 $up =~ s!/?[^/]+$!!;
4622                 undef $up unless $up;
4623                 # based on git_print_tree_entry
4624                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4625                 print '<td class="list">';
4626                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4627                                              file_name=>$up)},
4628                               "..");
4629                 print "</td>\n";
4630                 print "<td class=\"link\"></td>\n";
4631
4632                 print "</tr>\n";
4633         }
4634         foreach my $line (@entries) {
4635                 my %t = parse_ls_tree_line($line, -z => 1);
4636
4637                 if ($alternate) {
4638                         print "<tr class=\"dark\">\n";
4639                 } else {
4640                         print "<tr class=\"light\">\n";
4641                 }
4642                 $alternate ^= 1;
4643
4644                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4645
4646                 print "</tr>\n";
4647         }
4648         print "</table>\n" .
4649               "</div>";
4650         git_footer_html();
4651 }
4652
4653 sub git_snapshot {
4654         my @supported_fmts = gitweb_check_feature('snapshot');
4655         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4656
4657         my $format = $cgi->param('sf');
4658         if (!@supported_fmts) {
4659                 die_error(403, "Snapshots not allowed");
4660         }
4661         # default to first supported snapshot format
4662         $format ||= $supported_fmts[0];
4663         if ($format !~ m/^[a-z0-9]+$/) {
4664                 die_error(400, "Invalid snapshot format parameter");
4665         } elsif (!exists($known_snapshot_formats{$format})) {
4666                 die_error(400, "Unknown snapshot format");
4667         } elsif (!grep($_ eq $format, @supported_fmts)) {
4668                 die_error(403, "Unsupported snapshot format");
4669         }
4670
4671         if (!defined $hash) {
4672                 $hash = git_get_head_hash($project);
4673         }
4674
4675         my $name = $project;
4676         $name =~ s,([^/])/*\.git$,$1,;
4677         $name = basename($name);
4678         my $filename = to_utf8($name);
4679         $name =~ s/\047/\047\\\047\047/g;
4680         my $cmd;
4681         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4682         $cmd = quote_command(
4683                 git_cmd(), 'archive',
4684                 "--format=$known_snapshot_formats{$format}{'format'}",
4685                 "--prefix=$name/", $hash);
4686         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4687                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4688         }
4689
4690         print $cgi->header(
4691                 -type => $known_snapshot_formats{$format}{'type'},
4692                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4693                 -status => '200 OK');
4694
4695         open my $fd, "-|", $cmd
4696                 or die_error(500, "Execute git-archive failed");
4697         binmode STDOUT, ':raw';
4698         print <$fd>;
4699         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4700         close $fd;
4701 }
4702
4703 sub git_log {
4704         my $head = git_get_head_hash($project);
4705         if (!defined $hash) {
4706                 $hash = $head;
4707         }
4708         if (!defined $page) {
4709                 $page = 0;
4710         }
4711         my $refs = git_get_references();
4712
4713         my @commitlist = parse_commits($hash, 101, (100 * $page));
4714
4715         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4716
4717         git_header_html();
4718         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4719
4720         if (!@commitlist) {
4721                 my %co = parse_commit($hash);
4722
4723                 git_print_header_div('summary', $project);
4724                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4725         }
4726         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4727         for (my $i = 0; $i <= $to; $i++) {
4728                 my %co = %{$commitlist[$i]};
4729                 next if !%co;
4730                 my $commit = $co{'id'};
4731                 my $ref = format_ref_marker($refs, $commit);
4732                 my %ad = parse_date($co{'author_epoch'});
4733                 git_print_header_div('commit',
4734                                "<span class=\"age\">$co{'age_string'}</span>" .
4735                                esc_html($co{'title'}) . $ref,
4736                                $commit);
4737                 print "<div class=\"title_text\">\n" .
4738                       "<div class=\"log_link\">\n" .
4739                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4740                       " | " .
4741                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4742                       " | " .
4743                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4744                       "<br/>\n" .
4745                       "</div>\n" .
4746                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4747                       "</div>\n";
4748
4749                 print "<div class=\"log_body\">\n";
4750                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4751                 print "</div>\n";
4752         }
4753         if ($#commitlist >= 100) {
4754                 print "<div class=\"page_nav\">\n";
4755                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4756                                -accesskey => "n", -title => "Alt-n"}, "next");
4757                 print "</div>\n";
4758         }
4759         git_footer_html();
4760 }
4761
4762 sub git_commit {
4763         $hash ||= $hash_base || "HEAD";
4764         my %co = parse_commit($hash)
4765             or die_error(404, "Unknown commit object");
4766         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4767         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4768
4769         my $parent  = $co{'parent'};
4770         my $parents = $co{'parents'}; # listref
4771
4772         # we need to prepare $formats_nav before any parameter munging
4773         my $formats_nav;
4774         if (!defined $parent) {
4775                 # --root commitdiff
4776                 $formats_nav .= '(initial)';
4777         } elsif (@$parents == 1) {
4778                 # single parent commit
4779                 $formats_nav .=
4780                         '(parent: ' .
4781                         $cgi->a({-href => href(action=>"commit",
4782                                                hash=>$parent)},
4783                                 esc_html(substr($parent, 0, 7))) .
4784                         ')';
4785         } else {
4786                 # merge commit
4787                 $formats_nav .=
4788                         '(merge: ' .
4789                         join(' ', map {
4790                                 $cgi->a({-href => href(action=>"commit",
4791                                                        hash=>$_)},
4792                                         esc_html(substr($_, 0, 7)));
4793                         } @$parents ) .
4794                         ')';
4795         }
4796
4797         if (!defined $parent) {
4798                 $parent = "--root";
4799         }
4800         my @difftree;
4801         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4802                 @diff_opts,
4803                 (@$parents <= 1 ? $parent : '-c'),
4804                 $hash, "--"
4805                 or die_error(500, "Open git-diff-tree failed");
4806         @difftree = map { chomp; $_ } <$fd>;
4807         close $fd or die_error(404, "Reading git-diff-tree failed");
4808
4809         # non-textual hash id's can be cached
4810         my $expires;
4811         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4812                 $expires = "+1d";
4813         }
4814         my $refs = git_get_references();
4815         my $ref = format_ref_marker($refs, $co{'id'});
4816
4817         git_header_html(undef, $expires);
4818         git_print_page_nav('commit', '',
4819                            $hash, $co{'tree'}, $hash,
4820                            $formats_nav);
4821
4822         if (defined $co{'parent'}) {
4823                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4824         } else {
4825                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4826         }
4827         print "<div class=\"title_text\">\n" .
4828               "<table class=\"object_header\">\n";
4829         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4830               "<tr>" .
4831               "<td></td><td> $ad{'rfc2822'}";
4832         if ($ad{'hour_local'} < 6) {
4833                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4834                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4835         } else {
4836                 printf(" (%02d:%02d %s)",
4837                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4838         }
4839         print "</td>" .
4840               "</tr>\n";
4841         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4842         print "<tr><td></td><td> $cd{'rfc2822'}" .
4843               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4844               "</td></tr>\n";
4845         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4846         print "<tr>" .
4847               "<td>tree</td>" .
4848               "<td class=\"sha1\">" .
4849               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4850                        class => "list"}, $co{'tree'}) .
4851               "</td>" .
4852               "<td class=\"link\">" .
4853               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4854                       "tree");
4855         my $snapshot_links = format_snapshot_links($hash);
4856         if (defined $snapshot_links) {
4857                 print " | " . $snapshot_links;
4858         }
4859         print "</td>" .
4860               "</tr>\n";
4861
4862         foreach my $par (@$parents) {
4863                 print "<tr>" .
4864                       "<td>parent</td>" .
4865                       "<td class=\"sha1\">" .
4866                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4867                                class => "list"}, $par) .
4868                       "</td>" .
4869                       "<td class=\"link\">" .
4870                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4871                       " | " .
4872                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4873                       "</td>" .
4874                       "</tr>\n";
4875         }
4876         print "</table>".
4877               "</div>\n";
4878
4879         print "<div class=\"page_body\">\n";
4880         git_print_log($co{'comment'});
4881         print "</div>\n";
4882
4883         git_difftree_body(\@difftree, $hash, @$parents);
4884
4885         git_footer_html();
4886 }
4887
4888 sub git_object {
4889         # object is defined by:
4890         # - hash or hash_base alone
4891         # - hash_base and file_name
4892         my $type;
4893
4894         # - hash or hash_base alone
4895         if ($hash || ($hash_base && !defined $file_name)) {
4896                 my $object_id = $hash || $hash_base;
4897
4898                 open my $fd, "-|", quote_command(
4899                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4900                         or die_error(404, "Object does not exist");
4901                 $type = <$fd>;
4902                 chomp $type;
4903                 close $fd
4904                         or die_error(404, "Object does not exist");
4905
4906         # - hash_base and file_name
4907         } elsif ($hash_base && defined $file_name) {
4908                 $file_name =~ s,/+$,,;
4909
4910                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4911                         or die_error(404, "Base object does not exist");
4912
4913                 # here errors should not hapen
4914                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4915                         or die_error(500, "Open git-ls-tree failed");
4916                 my $line = <$fd>;
4917                 close $fd;
4918
4919                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4920                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4921                         die_error(404, "File or directory for given base does not exist");
4922                 }
4923                 $type = $2;
4924                 $hash = $3;
4925         } else {
4926                 die_error(400, "Not enough information to find object");
4927         }
4928
4929         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4930                                           hash=>$hash, hash_base=>$hash_base,
4931                                           file_name=>$file_name),
4932                              -status => '302 Found');
4933 }
4934
4935 sub git_blobdiff {
4936         my $format = shift || 'html';
4937
4938         my $fd;
4939         my @difftree;
4940         my %diffinfo;
4941         my $expires;
4942
4943         # preparing $fd and %diffinfo for git_patchset_body
4944         # new style URI
4945         if (defined $hash_base && defined $hash_parent_base) {
4946                 if (defined $file_name) {
4947                         # read raw output
4948                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4949                                 $hash_parent_base, $hash_base,
4950                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4951                                 or die_error(500, "Open git-diff-tree failed");
4952                         @difftree = map { chomp; $_ } <$fd>;
4953                         close $fd
4954                                 or die_error(404, "Reading git-diff-tree failed");
4955                         @difftree
4956                                 or die_error(404, "Blob diff not found");
4957
4958                 } elsif (defined $hash &&
4959                          $hash =~ /[0-9a-fA-F]{40}/) {
4960                         # try to find filename from $hash
4961
4962                         # read filtered raw output
4963                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4964                                 $hash_parent_base, $hash_base, "--"
4965                                 or die_error(500, "Open git-diff-tree failed");
4966                         @difftree =
4967                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4968                                 # $hash == to_id
4969                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4970                                 map { chomp; $_ } <$fd>;
4971                         close $fd
4972                                 or die_error(404, "Reading git-diff-tree failed");
4973                         @difftree
4974                                 or die_error(404, "Blob diff not found");
4975
4976                 } else {
4977                         die_error(400, "Missing one of the blob diff parameters");
4978                 }
4979
4980                 if (@difftree > 1) {
4981                         die_error(400, "Ambiguous blob diff specification");
4982                 }
4983
4984                 %diffinfo = parse_difftree_raw_line($difftree[0]);
4985                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
4986                 $file_name   ||= $diffinfo{'to_file'};
4987
4988                 $hash_parent ||= $diffinfo{'from_id'};
4989                 $hash        ||= $diffinfo{'to_id'};
4990
4991                 # non-textual hash id's can be cached
4992                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
4993                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
4994                         $expires = '+1d';
4995                 }
4996
4997                 # open patch output
4998                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4999                         '-p', ($format eq 'html' ? "--full-index" : ()),
5000                         $hash_parent_base, $hash_base,
5001                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5002                         or die_error(500, "Open git-diff-tree failed");
5003         }
5004
5005         # old/legacy style URI
5006         if (!%diffinfo && # if new style URI failed
5007             defined $hash && defined $hash_parent) {
5008                 # fake git-diff-tree raw output
5009                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5010                 $diffinfo{'from_id'} = $hash_parent;
5011                 $diffinfo{'to_id'}   = $hash;
5012                 if (defined $file_name) {
5013                         if (defined $file_parent) {
5014                                 $diffinfo{'status'} = '2';
5015                                 $diffinfo{'from_file'} = $file_parent;
5016                                 $diffinfo{'to_file'}   = $file_name;
5017                         } else { # assume not renamed
5018                                 $diffinfo{'status'} = '1';
5019                                 $diffinfo{'from_file'} = $file_name;
5020                                 $diffinfo{'to_file'}   = $file_name;
5021                         }
5022                 } else { # no filename given
5023                         $diffinfo{'status'} = '2';
5024                         $diffinfo{'from_file'} = $hash_parent;
5025                         $diffinfo{'to_file'}   = $hash;
5026                 }
5027
5028                 # non-textual hash id's can be cached
5029                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5030                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5031                         $expires = '+1d';
5032                 }
5033
5034                 # open patch output
5035                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5036                         '-p', ($format eq 'html' ? "--full-index" : ()),
5037                         $hash_parent, $hash, "--"
5038                         or die_error(500, "Open git-diff failed");
5039         } else  {
5040                 die_error(400, "Missing one of the blob diff parameters")
5041                         unless %diffinfo;
5042         }
5043
5044         # header
5045         if ($format eq 'html') {
5046                 my $formats_nav =
5047                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5048                                 "raw");
5049                 git_header_html(undef, $expires);
5050                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5051                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5052                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5053                 } else {
5054                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5055                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5056                 }
5057                 if (defined $file_name) {
5058                         git_print_page_path($file_name, "blob", $hash_base);
5059                 } else {
5060                         print "<div class=\"page_path\"></div>\n";
5061                 }
5062
5063         } elsif ($format eq 'plain') {
5064                 print $cgi->header(
5065                         -type => 'text/plain',
5066                         -charset => 'utf-8',
5067                         -expires => $expires,
5068                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5069
5070                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5071
5072         } else {
5073                 die_error(400, "Unknown blobdiff format");
5074         }
5075
5076         # patch
5077         if ($format eq 'html') {
5078                 print "<div class=\"page_body\">\n";
5079
5080                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5081                 close $fd;
5082
5083                 print "</div>\n"; # class="page_body"
5084                 git_footer_html();
5085
5086         } else {
5087                 while (my $line = <$fd>) {
5088                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5089                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5090
5091                         print $line;
5092
5093                         last if $line =~ m!^\+\+\+!;
5094                 }
5095                 local $/ = undef;
5096                 print <$fd>;
5097                 close $fd;
5098         }
5099 }
5100
5101 sub git_blobdiff_plain {
5102         git_blobdiff('plain');
5103 }
5104
5105 sub git_commitdiff {
5106         my $format = shift || 'html';
5107         $hash ||= $hash_base || "HEAD";
5108         my %co = parse_commit($hash)
5109             or die_error(404, "Unknown commit object");
5110
5111         # choose format for commitdiff for merge
5112         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5113                 $hash_parent = '--cc';
5114         }
5115         # we need to prepare $formats_nav before almost any parameter munging
5116         my $formats_nav;
5117         if ($format eq 'html') {
5118                 $formats_nav =
5119                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5120                                 "raw");
5121
5122                 if (defined $hash_parent &&
5123                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5124                         # commitdiff with two commits given
5125                         my $hash_parent_short = $hash_parent;
5126                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5127                                 $hash_parent_short = substr($hash_parent, 0, 7);
5128                         }
5129                         $formats_nav .=
5130                                 ' (from';
5131                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5132                                 if ($co{'parents'}[$i] eq $hash_parent) {
5133                                         $formats_nav .= ' parent ' . ($i+1);
5134                                         last;
5135                                 }
5136                         }
5137                         $formats_nav .= ': ' .
5138                                 $cgi->a({-href => href(action=>"commitdiff",
5139                                                        hash=>$hash_parent)},
5140                                         esc_html($hash_parent_short)) .
5141                                 ')';
5142                 } elsif (!$co{'parent'}) {
5143                         # --root commitdiff
5144                         $formats_nav .= ' (initial)';
5145                 } elsif (scalar @{$co{'parents'}} == 1) {
5146                         # single parent commit
5147                         $formats_nav .=
5148                                 ' (parent: ' .
5149                                 $cgi->a({-href => href(action=>"commitdiff",
5150                                                        hash=>$co{'parent'})},
5151                                         esc_html(substr($co{'parent'}, 0, 7))) .
5152                                 ')';
5153                 } else {
5154                         # merge commit
5155                         if ($hash_parent eq '--cc') {
5156                                 $formats_nav .= ' | ' .
5157                                         $cgi->a({-href => href(action=>"commitdiff",
5158                                                                hash=>$hash, hash_parent=>'-c')},
5159                                                 'combined');
5160                         } else { # $hash_parent eq '-c'
5161                                 $formats_nav .= ' | ' .
5162                                         $cgi->a({-href => href(action=>"commitdiff",
5163                                                                hash=>$hash, hash_parent=>'--cc')},
5164                                                 'compact');
5165                         }
5166                         $formats_nav .=
5167                                 ' (merge: ' .
5168                                 join(' ', map {
5169                                         $cgi->a({-href => href(action=>"commitdiff",
5170                                                                hash=>$_)},
5171                                                 esc_html(substr($_, 0, 7)));
5172                                 } @{$co{'parents'}} ) .
5173                                 ')';
5174                 }
5175         }
5176
5177         my $hash_parent_param = $hash_parent;
5178         if (!defined $hash_parent_param) {
5179                 # --cc for multiple parents, --root for parentless
5180                 $hash_parent_param =
5181                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5182         }
5183
5184         # read commitdiff
5185         my $fd;
5186         my @difftree;
5187         if ($format eq 'html') {
5188                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5189                         "--no-commit-id", "--patch-with-raw", "--full-index",
5190                         $hash_parent_param, $hash, "--"
5191                         or die_error(500, "Open git-diff-tree failed");
5192
5193                 while (my $line = <$fd>) {
5194                         chomp $line;
5195                         # empty line ends raw part of diff-tree output
5196                         last unless $line;
5197                         push @difftree, scalar parse_difftree_raw_line($line);
5198                 }
5199
5200         } elsif ($format eq 'plain') {
5201                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5202                         '-p', $hash_parent_param, $hash, "--"
5203                         or die_error(500, "Open git-diff-tree failed");
5204
5205         } else {
5206                 die_error(400, "Unknown commitdiff format");
5207         }
5208
5209         # non-textual hash id's can be cached
5210         my $expires;
5211         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5212                 $expires = "+1d";
5213         }
5214
5215         # write commit message
5216         if ($format eq 'html') {
5217                 my $refs = git_get_references();
5218                 my $ref = format_ref_marker($refs, $co{'id'});
5219
5220                 git_header_html(undef, $expires);
5221                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5222                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5223                 git_print_authorship(\%co);
5224                 print "<div class=\"page_body\">\n";
5225                 if (@{$co{'comment'}} > 1) {
5226                         print "<div class=\"log\">\n";
5227                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5228                         print "</div>\n"; # class="log"
5229                 }
5230
5231         } elsif ($format eq 'plain') {
5232                 my $refs = git_get_references("tags");
5233                 my $tagname = git_get_rev_name_tags($hash);
5234                 my $filename = basename($project) . "-$hash.patch";
5235
5236                 print $cgi->header(
5237                         -type => 'text/plain',
5238                         -charset => 'utf-8',
5239                         -expires => $expires,
5240                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5241                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5242                 print "From: " . to_utf8($co{'author'}) . "\n";
5243                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5244                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5245
5246                 print "X-Git-Tag: $tagname\n" if $tagname;
5247                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5248
5249                 foreach my $line (@{$co{'comment'}}) {
5250                         print to_utf8($line) . "\n";
5251                 }
5252                 print "---\n\n";
5253         }
5254
5255         # write patch
5256         if ($format eq 'html') {
5257                 my $use_parents = !defined $hash_parent ||
5258                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5259                 git_difftree_body(\@difftree, $hash,
5260                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5261                 print "<br/>\n";
5262
5263                 git_patchset_body($fd, \@difftree, $hash,
5264                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5265                 close $fd;
5266                 print "</div>\n"; # class="page_body"
5267                 git_footer_html();
5268
5269         } elsif ($format eq 'plain') {
5270                 local $/ = undef;
5271                 print <$fd>;
5272                 close $fd
5273                         or print "Reading git-diff-tree failed\n";
5274         }
5275 }
5276
5277 sub git_commitdiff_plain {
5278         git_commitdiff('plain');
5279 }
5280
5281 sub git_history {
5282         if (!defined $hash_base) {
5283                 $hash_base = git_get_head_hash($project);
5284         }
5285         if (!defined $page) {
5286                 $page = 0;
5287         }
5288         my $ftype;
5289         my %co = parse_commit($hash_base)
5290             or die_error(404, "Unknown commit object");
5291
5292         my $refs = git_get_references();
5293         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5294
5295         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5296                                        $file_name, "--full-history")
5297             or die_error(404, "No such file or directory on given branch");
5298
5299         if (!defined $hash && defined $file_name) {
5300                 # some commits could have deleted file in question,
5301                 # and not have it in tree, but one of them has to have it
5302                 for (my $i = 0; $i <= @commitlist; $i++) {
5303                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5304                         last if defined $hash;
5305                 }
5306         }
5307         if (defined $hash) {
5308                 $ftype = git_get_type($hash);
5309         }
5310         if (!defined $ftype) {
5311                 die_error(500, "Unknown type of object");
5312         }
5313
5314         my $paging_nav = '';
5315         if ($page > 0) {
5316                 $paging_nav .=
5317                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5318                                                file_name=>$file_name)},
5319                                 "first");
5320                 $paging_nav .= " &sdot; " .
5321                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5322                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5323         } else {
5324                 $paging_nav .= "first";
5325                 $paging_nav .= " &sdot; prev";
5326         }
5327         my $next_link = '';
5328         if ($#commitlist >= 100) {
5329                 $next_link =
5330                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5331                                  -accesskey => "n", -title => "Alt-n"}, "next");
5332                 $paging_nav .= " &sdot; $next_link";
5333         } else {
5334                 $paging_nav .= " &sdot; next";
5335         }
5336
5337         git_header_html();
5338         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5339         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5340         git_print_page_path($file_name, $ftype, $hash_base);
5341
5342         git_history_body(\@commitlist, 0, 99,
5343                          $refs, $hash_base, $ftype, $next_link);
5344
5345         git_footer_html();
5346 }
5347
5348 sub git_search {
5349         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5350         if (!defined $searchtext) {
5351                 die_error(400, "Text field is empty");
5352         }
5353         if (!defined $hash) {
5354                 $hash = git_get_head_hash($project);
5355         }
5356         my %co = parse_commit($hash);
5357         if (!%co) {
5358                 die_error(404, "Unknown commit object");
5359         }
5360         if (!defined $page) {
5361                 $page = 0;
5362         }
5363
5364         $searchtype ||= 'commit';
5365         if ($searchtype eq 'pickaxe') {
5366                 # pickaxe may take all resources of your box and run for several minutes
5367                 # with every query - so decide by yourself how public you make this feature
5368                 gitweb_check_feature('pickaxe')
5369                     or die_error(403, "Pickaxe is disabled");
5370         }
5371         if ($searchtype eq 'grep') {
5372                 gitweb_check_feature('grep')
5373                     or die_error(403, "Grep is disabled");
5374         }
5375
5376         git_header_html();
5377
5378         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5379                 my $greptype;
5380                 if ($searchtype eq 'commit') {
5381                         $greptype = "--grep=";
5382                 } elsif ($searchtype eq 'author') {
5383                         $greptype = "--author=";
5384                 } elsif ($searchtype eq 'committer') {
5385                         $greptype = "--committer=";
5386                 }
5387                 $greptype .= $searchtext;
5388                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5389                                                $greptype, '--regexp-ignore-case',
5390                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5391
5392                 my $paging_nav = '';
5393                 if ($page > 0) {
5394                         $paging_nav .=
5395                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5396                                                        searchtext=>$searchtext,
5397                                                        searchtype=>$searchtype)},
5398                                         "first");
5399                         $paging_nav .= " &sdot; " .
5400                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5401                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5402                 } else {
5403                         $paging_nav .= "first";
5404                         $paging_nav .= " &sdot; prev";
5405                 }
5406                 my $next_link = '';
5407                 if ($#commitlist >= 100) {
5408                         $next_link =
5409                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5410                                          -accesskey => "n", -title => "Alt-n"}, "next");
5411                         $paging_nav .= " &sdot; $next_link";
5412                 } else {
5413                         $paging_nav .= " &sdot; next";
5414                 }
5415
5416                 if ($#commitlist >= 100) {
5417                 }
5418
5419                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5420                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5421                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5422         }
5423
5424         if ($searchtype eq 'pickaxe') {
5425                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5426                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5427
5428                 print "<table class=\"pickaxe search\">\n";
5429                 my $alternate = 1;
5430                 $/ = "\n";
5431                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5432                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5433                         ($search_use_regexp ? '--pickaxe-regex' : ());
5434                 undef %co;
5435                 my @files;
5436                 while (my $line = <$fd>) {
5437                         chomp $line;
5438                         next unless $line;
5439
5440                         my %set = parse_difftree_raw_line($line);
5441                         if (defined $set{'commit'}) {
5442                                 # finish previous commit
5443                                 if (%co) {
5444                                         print "</td>\n" .
5445                                               "<td class=\"link\">" .
5446                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5447                                               " | " .
5448                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5449                                         print "</td>\n" .
5450                                               "</tr>\n";
5451                                 }
5452
5453                                 if ($alternate) {
5454                                         print "<tr class=\"dark\">\n";
5455                                 } else {
5456                                         print "<tr class=\"light\">\n";
5457                                 }
5458                                 $alternate ^= 1;
5459                                 %co = parse_commit($set{'commit'});
5460                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5461                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5462                                       "<td><i>$author</i></td>\n" .
5463                                       "<td>" .
5464                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5465                                               -class => "list subject"},
5466                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5467                         } elsif (defined $set{'to_id'}) {
5468                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5469
5470                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5471                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5472                                               -class => "list"},
5473                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5474                                       "<br/>\n";
5475                         }
5476                 }
5477                 close $fd;
5478
5479                 # finish last commit (warning: repetition!)
5480                 if (%co) {
5481                         print "</td>\n" .
5482                               "<td class=\"link\">" .
5483                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5484                               " | " .
5485                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5486                         print "</td>\n" .
5487                               "</tr>\n";
5488                 }
5489
5490                 print "</table>\n";
5491         }
5492
5493         if ($searchtype eq 'grep') {
5494                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5495                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5496
5497                 print "<table class=\"grep_search\">\n";
5498                 my $alternate = 1;
5499                 my $matches = 0;
5500                 $/ = "\n";
5501                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5502                         $search_use_regexp ? ('-E', '-i') : '-F',
5503                         $searchtext, $co{'tree'};
5504                 my $lastfile = '';
5505                 while (my $line = <$fd>) {
5506                         chomp $line;
5507                         my ($file, $lno, $ltext, $binary);
5508                         last if ($matches++ > 1000);
5509                         if ($line =~ /^Binary file (.+) matches$/) {
5510                                 $file = $1;
5511                                 $binary = 1;
5512                         } else {
5513                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5514                         }
5515                         if ($file ne $lastfile) {
5516                                 $lastfile and print "</td></tr>\n";
5517                                 if ($alternate++) {
5518                                         print "<tr class=\"dark\">\n";
5519                                 } else {
5520                                         print "<tr class=\"light\">\n";
5521                                 }
5522                                 print "<td class=\"list\">".
5523                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5524                                                                file_name=>"$file"),
5525                                                 -class => "list"}, esc_path($file));
5526                                 print "</td><td>\n";
5527                                 $lastfile = $file;
5528                         }
5529                         if ($binary) {
5530                                 print "<div class=\"binary\">Binary file</div>\n";
5531                         } else {
5532                                 $ltext = untabify($ltext);
5533                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5534                                         $ltext = esc_html($1, -nbsp=>1);
5535                                         $ltext .= '<span class="match">';
5536                                         $ltext .= esc_html($2, -nbsp=>1);
5537                                         $ltext .= '</span>';
5538                                         $ltext .= esc_html($3, -nbsp=>1);
5539                                 } else {
5540                                         $ltext = esc_html($ltext, -nbsp=>1);
5541                                 }
5542                                 print "<div class=\"pre\">" .
5543                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5544                                                                file_name=>"$file").'#l'.$lno,
5545                                                 -class => "linenr"}, sprintf('%4i', $lno))
5546                                         . ' ' .  $ltext . "</div>\n";
5547                         }
5548                 }
5549                 if ($lastfile) {
5550                         print "</td></tr>\n";
5551                         if ($matches > 1000) {
5552                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5553                         }
5554                 } else {
5555                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5556                 }
5557                 close $fd;
5558
5559                 print "</table>\n";
5560         }
5561         git_footer_html();
5562 }
5563
5564 sub git_search_help {
5565         git_header_html();
5566         git_print_page_nav('','', $hash,$hash,$hash);
5567         print <<EOT;
5568 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5569 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5570 the pattern entered is recognized as the POSIX extended
5571 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5572 insensitive).</p>
5573 <dl>
5574 <dt><b>commit</b></dt>
5575 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5576 EOT
5577         my ($have_grep) = gitweb_check_feature('grep');
5578         if ($have_grep) {
5579                 print <<EOT;
5580 <dt><b>grep</b></dt>
5581 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5582     a different one) are searched for the given pattern. On large trees, this search can take
5583 a while and put some strain on the server, so please use it with some consideration. Note that
5584 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5585 case-sensitive.</dd>
5586 EOT
5587         }
5588         print <<EOT;
5589 <dt><b>author</b></dt>
5590 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5591 <dt><b>committer</b></dt>
5592 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5593 EOT
5594         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5595         if ($have_pickaxe) {
5596                 print <<EOT;
5597 <dt><b>pickaxe</b></dt>
5598 <dd>All commits that caused the string to appear or disappear from any file (changes that
5599 added, removed or "modified" the string) will be listed. This search can take a while and
5600 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5601 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5602 EOT
5603         }
5604         print "</dl>\n";
5605         git_footer_html();
5606 }
5607
5608 sub git_shortlog {
5609         my $head = git_get_head_hash($project);
5610         if (!defined $hash) {
5611                 $hash = $head;
5612         }
5613         if (!defined $page) {
5614                 $page = 0;
5615         }
5616         my $refs = git_get_references();
5617
5618         my $commit_hash = $hash;
5619         if (defined $hash_parent) {
5620                 $commit_hash = "$hash_parent..$hash";
5621         }
5622         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5623
5624         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5625         my $next_link = '';
5626         if ($#commitlist >= 100) {
5627                 $next_link =
5628                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5629                                  -accesskey => "n", -title => "Alt-n"}, "next");
5630         }
5631
5632         git_header_html();
5633         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5634         git_print_header_div('summary', $project);
5635
5636         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5637
5638         git_footer_html();
5639 }
5640
5641 ## ......................................................................
5642 ## feeds (RSS, Atom; OPML)
5643
5644 sub git_feed {
5645         my $format = shift || 'atom';
5646         my ($have_blame) = gitweb_check_feature('blame');
5647
5648         # Atom: http://www.atomenabled.org/developers/syndication/
5649         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5650         if ($format ne 'rss' && $format ne 'atom') {
5651                 die_error(400, "Unknown web feed format");
5652         }
5653
5654         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5655         my $head = $hash || 'HEAD';
5656         my @commitlist = parse_commits($head, 150, 0, $file_name);
5657
5658         my %latest_commit;
5659         my %latest_date;
5660         my $content_type = "application/$format+xml";
5661         if (defined $cgi->http('HTTP_ACCEPT') &&
5662                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5663                 # browser (feed reader) prefers text/xml
5664                 $content_type = 'text/xml';
5665         }
5666         if (defined($commitlist[0])) {
5667                 %latest_commit = %{$commitlist[0]};
5668                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5669                 print $cgi->header(
5670                         -type => $content_type,
5671                         -charset => 'utf-8',
5672                         -last_modified => $latest_date{'rfc2822'});
5673         } else {
5674                 print $cgi->header(
5675                         -type => $content_type,
5676                         -charset => 'utf-8');
5677         }
5678
5679         # Optimization: skip generating the body if client asks only
5680         # for Last-Modified date.
5681         return if ($cgi->request_method() eq 'HEAD');
5682
5683         # header variables
5684         my $title = "$site_name - $project/$action";
5685         my $feed_type = 'log';
5686         if (defined $hash) {
5687                 $title .= " - '$hash'";
5688                 $feed_type = 'branch log';
5689                 if (defined $file_name) {
5690                         $title .= " :: $file_name";
5691                         $feed_type = 'history';
5692                 }
5693         } elsif (defined $file_name) {
5694                 $title .= " - $file_name";
5695                 $feed_type = 'history';
5696         }
5697         $title .= " $feed_type";
5698         my $descr = git_get_project_description($project);
5699         if (defined $descr) {
5700                 $descr = esc_html($descr);
5701         } else {
5702                 $descr = "$project " .
5703                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5704                          " feed";
5705         }
5706         my $owner = git_get_project_owner($project);
5707         $owner = esc_html($owner);
5708
5709         #header
5710         my $alt_url;
5711         if (defined $file_name) {
5712                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5713         } elsif (defined $hash) {
5714                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5715         } else {
5716                 $alt_url = href(-full=>1, action=>"summary");
5717         }
5718         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5719         if ($format eq 'rss') {
5720                 print <<XML;
5721 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5722 <channel>
5723 XML
5724                 print "<title>$title</title>\n" .
5725                       "<link>$alt_url</link>\n" .
5726                       "<description>$descr</description>\n" .
5727                       "<language>en</language>\n";
5728         } elsif ($format eq 'atom') {
5729                 print <<XML;
5730 <feed xmlns="http://www.w3.org/2005/Atom">
5731 XML
5732                 print "<title>$title</title>\n" .
5733                       "<subtitle>$descr</subtitle>\n" .
5734                       '<link rel="alternate" type="text/html" href="' .
5735                       $alt_url . '" />' . "\n" .
5736                       '<link rel="self" type="' . $content_type . '" href="' .
5737                       $cgi->self_url() . '" />' . "\n" .
5738                       "<id>" . href(-full=>1) . "</id>\n" .
5739                       # use project owner for feed author
5740                       "<author><name>$owner</name></author>\n";
5741                 if (defined $favicon) {
5742                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5743                 }
5744                 if (defined $logo_url) {
5745                         # not twice as wide as tall: 72 x 27 pixels
5746                         print "<logo>" . esc_url($logo) . "</logo>\n";
5747                 }
5748                 if (! %latest_date) {
5749                         # dummy date to keep the feed valid until commits trickle in:
5750                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5751                 } else {
5752                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5753                 }
5754         }
5755
5756         # contents
5757         for (my $i = 0; $i <= $#commitlist; $i++) {
5758                 my %co = %{$commitlist[$i]};
5759                 my $commit = $co{'id'};
5760                 # we read 150, we always show 30 and the ones more recent than 48 hours
5761                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5762                         last;
5763                 }
5764                 my %cd = parse_date($co{'author_epoch'});
5765
5766                 # get list of changed files
5767                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5768                         $co{'parent'} || "--root",
5769                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5770                         or next;
5771                 my @difftree = map { chomp; $_ } <$fd>;
5772                 close $fd
5773                         or next;
5774
5775                 # print element (entry, item)
5776                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5777                 if ($format eq 'rss') {
5778                         print "<item>\n" .
5779                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5780                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5781                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5782                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5783                               "<link>$co_url</link>\n" .
5784                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5785                               "<content:encoded>" .
5786                               "<![CDATA[\n";
5787                 } elsif ($format eq 'atom') {
5788                         print "<entry>\n" .
5789                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5790                               "<updated>$cd{'iso-8601'}</updated>\n" .
5791                               "<author>\n" .
5792                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5793                         if ($co{'author_email'}) {
5794                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5795                         }
5796                         print "</author>\n" .
5797                               # use committer for contributor
5798                               "<contributor>\n" .
5799                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5800                         if ($co{'committer_email'}) {
5801                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5802                         }
5803                         print "</contributor>\n" .
5804                               "<published>$cd{'iso-8601'}</published>\n" .
5805                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5806                               "<id>$co_url</id>\n" .
5807                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5808                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5809                 }
5810                 my $comment = $co{'comment'};
5811                 print "<pre>\n";
5812                 foreach my $line (@$comment) {
5813                         $line = esc_html($line);
5814                         print "$line\n";
5815                 }
5816                 print "</pre><ul>\n";
5817                 foreach my $difftree_line (@difftree) {
5818                         my %difftree = parse_difftree_raw_line($difftree_line);
5819                         next if !$difftree{'from_id'};
5820
5821                         my $file = $difftree{'file'} || $difftree{'to_file'};
5822
5823                         print "<li>" .
5824                               "[" .
5825                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5826                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5827                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5828                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5829                                       -title => "diff"}, 'D');
5830                         if ($have_blame) {
5831                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5832                                                              file_name=>$file, hash_base=>$commit),
5833                                               -title => "blame"}, 'B');
5834                         }
5835                         # if this is not a feed of a file history
5836                         if (!defined $file_name || $file_name ne $file) {
5837                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5838                                                              file_name=>$file, hash=>$commit),
5839                                               -title => "history"}, 'H');
5840                         }
5841                         $file = esc_path($file);
5842                         print "] ".
5843                               "$file</li>\n";
5844                 }
5845                 if ($format eq 'rss') {
5846                         print "</ul>]]>\n" .
5847                               "</content:encoded>\n" .
5848                               "</item>\n";
5849                 } elsif ($format eq 'atom') {
5850                         print "</ul>\n</div>\n" .
5851                               "</content>\n" .
5852                               "</entry>\n";
5853                 }
5854         }
5855
5856         # end of feed
5857         if ($format eq 'rss') {
5858                 print "</channel>\n</rss>\n";
5859         }       elsif ($format eq 'atom') {
5860                 print "</feed>\n";
5861         }
5862 }
5863
5864 sub git_rss {
5865         git_feed('rss');
5866 }
5867
5868 sub git_atom {
5869         git_feed('atom');
5870 }
5871
5872 sub git_opml {
5873         my @list = git_get_projects_list();
5874
5875         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5876         print <<XML;
5877 <?xml version="1.0" encoding="utf-8"?>
5878 <opml version="1.0">
5879 <head>
5880   <title>$site_name OPML Export</title>
5881 </head>
5882 <body>
5883 <outline text="git RSS feeds">
5884 XML
5885
5886         foreach my $pr (@list) {
5887                 my %proj = %$pr;
5888                 my $head = git_get_head_hash($proj{'path'});
5889                 if (!defined $head) {
5890                         next;
5891                 }
5892                 $git_dir = "$projectroot/$proj{'path'}";
5893                 my %co = parse_commit($head);
5894                 if (!%co) {
5895                         next;
5896                 }
5897
5898                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5899                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5900                 my $html = "$my_url?p=$proj{'path'};a=summary";
5901                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5902         }
5903         print <<XML;
5904 </outline>
5905 </body>
5906 </opml>
5907 XML
5908 }