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 $projectroot
1892                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
1893                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1894                                         $File::Find::prune = 1;
1895                                 }
1896                         },
1897                 }, "$dir");
1898
1899         } elsif (-f $projects_list) {
1900                 # read from file(url-encoded):
1901                 # 'git%2Fgit.git Linus+Torvalds'
1902                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1903                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1904                 my %paths;
1905                 open my ($fd), $projects_list or return;
1906         PROJECT:
1907                 while (my $line = <$fd>) {
1908                         chomp $line;
1909                         my ($path, $owner) = split ' ', $line;
1910                         $path = unescape($path);
1911                         $owner = unescape($owner);
1912                         if (!defined $path) {
1913                                 next;
1914                         }
1915                         if ($filter ne '') {
1916                                 # looking for forks;
1917                                 my $pfx = substr($path, 0, length($filter));
1918                                 if ($pfx ne $filter) {
1919                                         next PROJECT;
1920                                 }
1921                                 my $sfx = substr($path, length($filter));
1922                                 if ($sfx !~ /^\/.*\.git$/) {
1923                                         next PROJECT;
1924                                 }
1925                         } elsif ($check_forks) {
1926                         PATH:
1927                                 foreach my $filter (keys %paths) {
1928                                         # looking for forks;
1929                                         my $pfx = substr($path, 0, length($filter));
1930                                         if ($pfx ne $filter) {
1931                                                 next PATH;
1932                                         }
1933                                         my $sfx = substr($path, length($filter));
1934                                         if ($sfx !~ /^\/.*\.git$/) {
1935                                                 next PATH;
1936                                         }
1937                                         # is a fork, don't include it in
1938                                         # the list
1939                                         next PROJECT;
1940                                 }
1941                         }
1942                         if (check_export_ok("$projectroot/$path")) {
1943                                 my $pr = {
1944                                         path => $path,
1945                                         owner => to_utf8($owner),
1946                                 };
1947                                 push @list, $pr;
1948                                 (my $forks_path = $path) =~ s/\.git$//;
1949                                 $paths{$forks_path}++;
1950                         }
1951                 }
1952                 close $fd;
1953         }
1954         return @list;
1955 }
1956
1957 our $gitweb_project_owner = undef;
1958 sub git_get_project_list_from_file {
1959
1960         return if (defined $gitweb_project_owner);
1961
1962         $gitweb_project_owner = {};
1963         # read from file (url-encoded):
1964         # 'git%2Fgit.git Linus+Torvalds'
1965         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1966         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1967         if (-f $projects_list) {
1968                 open (my $fd , $projects_list);
1969                 while (my $line = <$fd>) {
1970                         chomp $line;
1971                         my ($pr, $ow) = split ' ', $line;
1972                         $pr = unescape($pr);
1973                         $ow = unescape($ow);
1974                         $gitweb_project_owner->{$pr} = to_utf8($ow);
1975                 }
1976                 close $fd;
1977         }
1978 }
1979
1980 sub git_get_project_owner {
1981         my $project = shift;
1982         my $owner;
1983
1984         return undef unless $project;
1985         $git_dir = "$projectroot/$project";
1986
1987         if (!defined $gitweb_project_owner) {
1988                 git_get_project_list_from_file();
1989         }
1990
1991         if (exists $gitweb_project_owner->{$project}) {
1992                 $owner = $gitweb_project_owner->{$project};
1993         }
1994         if (!defined $owner){
1995                 $owner = git_get_project_config('owner');
1996         }
1997         if (!defined $owner) {
1998                 $owner = get_file_owner("$git_dir");
1999         }
2000
2001         return $owner;
2002 }
2003
2004 sub git_get_last_activity {
2005         my ($path) = @_;
2006         my $fd;
2007
2008         $git_dir = "$projectroot/$path";
2009         open($fd, "-|", git_cmd(), 'for-each-ref',
2010              '--format=%(committer)',
2011              '--sort=-committerdate',
2012              '--count=1',
2013              'refs/heads') or return;
2014         my $most_recent = <$fd>;
2015         close $fd or return;
2016         if (defined $most_recent &&
2017             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2018                 my $timestamp = $1;
2019                 my $age = time - $timestamp;
2020                 return ($age, age_string($age));
2021         }
2022         return (undef, undef);
2023 }
2024
2025 sub git_get_references {
2026         my $type = shift || "";
2027         my %refs;
2028         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2029         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2030         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2031                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2032                 or return;
2033
2034         while (my $line = <$fd>) {
2035                 chomp $line;
2036                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2037                         if (defined $refs{$1}) {
2038                                 push @{$refs{$1}}, $2;
2039                         } else {
2040                                 $refs{$1} = [ $2 ];
2041                         }
2042                 }
2043         }
2044         close $fd or return;
2045         return \%refs;
2046 }
2047
2048 sub git_get_rev_name_tags {
2049         my $hash = shift || return undef;
2050
2051         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2052                 or return;
2053         my $name_rev = <$fd>;
2054         close $fd;
2055
2056         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2057                 return $1;
2058         } else {
2059                 # catches also '$hash undefined' output
2060                 return undef;
2061         }
2062 }
2063
2064 ## ----------------------------------------------------------------------
2065 ## parse to hash functions
2066
2067 sub parse_date {
2068         my $epoch = shift;
2069         my $tz = shift || "-0000";
2070
2071         my %date;
2072         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2073         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2074         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2075         $date{'hour'} = $hour;
2076         $date{'minute'} = $min;
2077         $date{'mday'} = $mday;
2078         $date{'day'} = $days[$wday];
2079         $date{'month'} = $months[$mon];
2080         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2081                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2082         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2083                              $mday, $months[$mon], $hour ,$min;
2084         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2085                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2086
2087         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2088         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2089         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2090         $date{'hour_local'} = $hour;
2091         $date{'minute_local'} = $min;
2092         $date{'tz_local'} = $tz;
2093         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2094                                   1900+$year, $mon+1, $mday,
2095                                   $hour, $min, $sec, $tz);
2096         return %date;
2097 }
2098
2099 sub parse_tag {
2100         my $tag_id = shift;
2101         my %tag;
2102         my @comment;
2103
2104         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2105         $tag{'id'} = $tag_id;
2106         while (my $line = <$fd>) {
2107                 chomp $line;
2108                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2109                         $tag{'object'} = $1;
2110                 } elsif ($line =~ m/^type (.+)$/) {
2111                         $tag{'type'} = $1;
2112                 } elsif ($line =~ m/^tag (.+)$/) {
2113                         $tag{'name'} = $1;
2114                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2115                         $tag{'author'} = $1;
2116                         $tag{'epoch'} = $2;
2117                         $tag{'tz'} = $3;
2118                 } elsif ($line =~ m/--BEGIN/) {
2119                         push @comment, $line;
2120                         last;
2121                 } elsif ($line eq "") {
2122                         last;
2123                 }
2124         }
2125         push @comment, <$fd>;
2126         $tag{'comment'} = \@comment;
2127         close $fd or return;
2128         if (!defined $tag{'name'}) {
2129                 return
2130         };
2131         return %tag
2132 }
2133
2134 sub parse_commit_text {
2135         my ($commit_text, $withparents) = @_;
2136         my @commit_lines = split '\n', $commit_text;
2137         my %co;
2138
2139         pop @commit_lines; # Remove '\0'
2140
2141         if (! @commit_lines) {
2142                 return;
2143         }
2144
2145         my $header = shift @commit_lines;
2146         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2147                 return;
2148         }
2149         ($co{'id'}, my @parents) = split ' ', $header;
2150         while (my $line = shift @commit_lines) {
2151                 last if $line eq "\n";
2152                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2153                         $co{'tree'} = $1;
2154                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2155                         push @parents, $1;
2156                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2157                         $co{'author'} = $1;
2158                         $co{'author_epoch'} = $2;
2159                         $co{'author_tz'} = $3;
2160                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2161                                 $co{'author_name'}  = $1;
2162                                 $co{'author_email'} = $2;
2163                         } else {
2164                                 $co{'author_name'} = $co{'author'};
2165                         }
2166                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2167                         $co{'committer'} = $1;
2168                         $co{'committer_epoch'} = $2;
2169                         $co{'committer_tz'} = $3;
2170                         $co{'committer_name'} = $co{'committer'};
2171                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2172                                 $co{'committer_name'}  = $1;
2173                                 $co{'committer_email'} = $2;
2174                         } else {
2175                                 $co{'committer_name'} = $co{'committer'};
2176                         }
2177                 }
2178         }
2179         if (!defined $co{'tree'}) {
2180                 return;
2181         };
2182         $co{'parents'} = \@parents;
2183         $co{'parent'} = $parents[0];
2184
2185         foreach my $title (@commit_lines) {
2186                 $title =~ s/^    //;
2187                 if ($title ne "") {
2188                         $co{'title'} = chop_str($title, 80, 5);
2189                         # remove leading stuff of merges to make the interesting part visible
2190                         if (length($title) > 50) {
2191                                 $title =~ s/^Automatic //;
2192                                 $title =~ s/^merge (of|with) /Merge ... /i;
2193                                 if (length($title) > 50) {
2194                                         $title =~ s/(http|rsync):\/\///;
2195                                 }
2196                                 if (length($title) > 50) {
2197                                         $title =~ s/(master|www|rsync)\.//;
2198                                 }
2199                                 if (length($title) > 50) {
2200                                         $title =~ s/kernel.org:?//;
2201                                 }
2202                                 if (length($title) > 50) {
2203                                         $title =~ s/\/pub\/scm//;
2204                                 }
2205                         }
2206                         $co{'title_short'} = chop_str($title, 50, 5);
2207                         last;
2208                 }
2209         }
2210         if (! defined $co{'title'} || $co{'title'} eq "") {
2211                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2212         }
2213         # remove added spaces
2214         foreach my $line (@commit_lines) {
2215                 $line =~ s/^    //;
2216         }
2217         $co{'comment'} = \@commit_lines;
2218
2219         my $age = time - $co{'committer_epoch'};
2220         $co{'age'} = $age;
2221         $co{'age_string'} = age_string($age);
2222         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2223         if ($age > 60*60*24*7*2) {
2224                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2225                 $co{'age_string_age'} = $co{'age_string'};
2226         } else {
2227                 $co{'age_string_date'} = $co{'age_string'};
2228                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2229         }
2230         return %co;
2231 }
2232
2233 sub parse_commit {
2234         my ($commit_id) = @_;
2235         my %co;
2236
2237         local $/ = "\0";
2238
2239         open my $fd, "-|", git_cmd(), "rev-list",
2240                 "--parents",
2241                 "--header",
2242                 "--max-count=1",
2243                 $commit_id,
2244                 "--",
2245                 or die_error(500, "Open git-rev-list failed");
2246         %co = parse_commit_text(<$fd>, 1);
2247         close $fd;
2248
2249         return %co;
2250 }
2251
2252 sub parse_commits {
2253         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2254         my @cos;
2255
2256         $maxcount ||= 1;
2257         $skip ||= 0;
2258
2259         local $/ = "\0";
2260
2261         open my $fd, "-|", git_cmd(), "rev-list",
2262                 "--header",
2263                 @args,
2264                 ("--max-count=" . $maxcount),
2265                 ("--skip=" . $skip),
2266                 @extra_options,
2267                 $commit_id,
2268                 "--",
2269                 ($filename ? ($filename) : ())
2270                 or die_error(500, "Open git-rev-list failed");
2271         while (my $line = <$fd>) {
2272                 my %co = parse_commit_text($line);
2273                 push @cos, \%co;
2274         }
2275         close $fd;
2276
2277         return wantarray ? @cos : \@cos;
2278 }
2279
2280 # parse line of git-diff-tree "raw" output
2281 sub parse_difftree_raw_line {
2282         my $line = shift;
2283         my %res;
2284
2285         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2286         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2287         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2288                 $res{'from_mode'} = $1;
2289                 $res{'to_mode'} = $2;
2290                 $res{'from_id'} = $3;
2291                 $res{'to_id'} = $4;
2292                 $res{'status'} = $5;
2293                 $res{'similarity'} = $6;
2294                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2295                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2296                 } else {
2297                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2298                 }
2299         }
2300         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2301         # combined diff (for merge commit)
2302         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2303                 $res{'nparents'}  = length($1);
2304                 $res{'from_mode'} = [ split(' ', $2) ];
2305                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2306                 $res{'from_id'} = [ split(' ', $3) ];
2307                 $res{'to_id'} = pop @{$res{'from_id'}};
2308                 $res{'status'} = [ split('', $4) ];
2309                 $res{'to_file'} = unquote($5);
2310         }
2311         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2312         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2313                 $res{'commit'} = $1;
2314         }
2315
2316         return wantarray ? %res : \%res;
2317 }
2318
2319 # wrapper: return parsed line of git-diff-tree "raw" output
2320 # (the argument might be raw line, or parsed info)
2321 sub parsed_difftree_line {
2322         my $line_or_ref = shift;
2323
2324         if (ref($line_or_ref) eq "HASH") {
2325                 # pre-parsed (or generated by hand)
2326                 return $line_or_ref;
2327         } else {
2328                 return parse_difftree_raw_line($line_or_ref);
2329         }
2330 }
2331
2332 # parse line of git-ls-tree output
2333 sub parse_ls_tree_line ($;%) {
2334         my $line = shift;
2335         my %opts = @_;
2336         my %res;
2337
2338         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2339         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2340
2341         $res{'mode'} = $1;
2342         $res{'type'} = $2;
2343         $res{'hash'} = $3;
2344         if ($opts{'-z'}) {
2345                 $res{'name'} = $4;
2346         } else {
2347                 $res{'name'} = unquote($4);
2348         }
2349
2350         return wantarray ? %res : \%res;
2351 }
2352
2353 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2354 sub parse_from_to_diffinfo {
2355         my ($diffinfo, $from, $to, @parents) = @_;
2356
2357         if ($diffinfo->{'nparents'}) {
2358                 # combined diff
2359                 $from->{'file'} = [];
2360                 $from->{'href'} = [];
2361                 fill_from_file_info($diffinfo, @parents)
2362                         unless exists $diffinfo->{'from_file'};
2363                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2364                         $from->{'file'}[$i] =
2365                                 defined $diffinfo->{'from_file'}[$i] ?
2366                                         $diffinfo->{'from_file'}[$i] :
2367                                         $diffinfo->{'to_file'};
2368                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2369                                 $from->{'href'}[$i] = href(action=>"blob",
2370                                                            hash_base=>$parents[$i],
2371                                                            hash=>$diffinfo->{'from_id'}[$i],
2372                                                            file_name=>$from->{'file'}[$i]);
2373                         } else {
2374                                 $from->{'href'}[$i] = undef;
2375                         }
2376                 }
2377         } else {
2378                 # ordinary (not combined) diff
2379                 $from->{'file'} = $diffinfo->{'from_file'};
2380                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2381                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2382                                                hash=>$diffinfo->{'from_id'},
2383                                                file_name=>$from->{'file'});
2384                 } else {
2385                         delete $from->{'href'};
2386                 }
2387         }
2388
2389         $to->{'file'} = $diffinfo->{'to_file'};
2390         if (!is_deleted($diffinfo)) { # file exists in result
2391                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2392                                      hash=>$diffinfo->{'to_id'},
2393                                      file_name=>$to->{'file'});
2394         } else {
2395                 delete $to->{'href'};
2396         }
2397 }
2398
2399 ## ......................................................................
2400 ## parse to array of hashes functions
2401
2402 sub git_get_heads_list {
2403         my $limit = shift;
2404         my @headslist;
2405
2406         open my $fd, '-|', git_cmd(), 'for-each-ref',
2407                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2408                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2409                 'refs/heads'
2410                 or return;
2411         while (my $line = <$fd>) {
2412                 my %ref_item;
2413
2414                 chomp $line;
2415                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2416                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2417                 my ($committer, $epoch, $tz) =
2418                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2419                 $ref_item{'fullname'}  = $name;
2420                 $name =~ s!^refs/heads/!!;
2421
2422                 $ref_item{'name'}  = $name;
2423                 $ref_item{'id'}    = $hash;
2424                 $ref_item{'title'} = $title || '(no commit message)';
2425                 $ref_item{'epoch'} = $epoch;
2426                 if ($epoch) {
2427                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2428                 } else {
2429                         $ref_item{'age'} = "unknown";
2430                 }
2431
2432                 push @headslist, \%ref_item;
2433         }
2434         close $fd;
2435
2436         return wantarray ? @headslist : \@headslist;
2437 }
2438
2439 sub git_get_tags_list {
2440         my $limit = shift;
2441         my @tagslist;
2442
2443         open my $fd, '-|', git_cmd(), 'for-each-ref',
2444                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2445                 '--format=%(objectname) %(objecttype) %(refname) '.
2446                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2447                 'refs/tags'
2448                 or return;
2449         while (my $line = <$fd>) {
2450                 my %ref_item;
2451
2452                 chomp $line;
2453                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2454                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2455                 my ($creator, $epoch, $tz) =
2456                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2457                 $ref_item{'fullname'} = $name;
2458                 $name =~ s!^refs/tags/!!;
2459
2460                 $ref_item{'type'} = $type;
2461                 $ref_item{'id'} = $id;
2462                 $ref_item{'name'} = $name;
2463                 if ($type eq "tag") {
2464                         $ref_item{'subject'} = $title;
2465                         $ref_item{'reftype'} = $reftype;
2466                         $ref_item{'refid'}   = $refid;
2467                 } else {
2468                         $ref_item{'reftype'} = $type;
2469                         $ref_item{'refid'}   = $id;
2470                 }
2471
2472                 if ($type eq "tag" || $type eq "commit") {
2473                         $ref_item{'epoch'} = $epoch;
2474                         if ($epoch) {
2475                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2476                         } else {
2477                                 $ref_item{'age'} = "unknown";
2478                         }
2479                 }
2480
2481                 push @tagslist, \%ref_item;
2482         }
2483         close $fd;
2484
2485         return wantarray ? @tagslist : \@tagslist;
2486 }
2487
2488 ## ----------------------------------------------------------------------
2489 ## filesystem-related functions
2490
2491 sub get_file_owner {
2492         my $path = shift;
2493
2494         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2495         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2496         if (!defined $gcos) {
2497                 return undef;
2498         }
2499         my $owner = $gcos;
2500         $owner =~ s/[,;].*$//;
2501         return to_utf8($owner);
2502 }
2503
2504 ## ......................................................................
2505 ## mimetype related functions
2506
2507 sub mimetype_guess_file {
2508         my $filename = shift;
2509         my $mimemap = shift;
2510         -r $mimemap or return undef;
2511
2512         my %mimemap;
2513         open(MIME, $mimemap) or return undef;
2514         while (<MIME>) {
2515                 next if m/^#/; # skip comments
2516                 my ($mime, $exts) = split(/\t+/);
2517                 if (defined $exts) {
2518                         my @exts = split(/\s+/, $exts);
2519                         foreach my $ext (@exts) {
2520                                 $mimemap{$ext} = $mime;
2521                         }
2522                 }
2523         }
2524         close(MIME);
2525
2526         $filename =~ /\.([^.]*)$/;
2527         return $mimemap{$1};
2528 }
2529
2530 sub mimetype_guess {
2531         my $filename = shift;
2532         my $mime;
2533         $filename =~ /\./ or return undef;
2534
2535         if ($mimetypes_file) {
2536                 my $file = $mimetypes_file;
2537                 if ($file !~ m!^/!) { # if it is relative path
2538                         # it is relative to project
2539                         $file = "$projectroot/$project/$file";
2540                 }
2541                 $mime = mimetype_guess_file($filename, $file);
2542         }
2543         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2544         return $mime;
2545 }
2546
2547 sub blob_mimetype {
2548         my $fd = shift;
2549         my $filename = shift;
2550
2551         if ($filename) {
2552                 my $mime = mimetype_guess($filename);
2553                 $mime and return $mime;
2554         }
2555
2556         # just in case
2557         return $default_blob_plain_mimetype unless $fd;
2558
2559         if (-T $fd) {
2560                 return 'text/plain';
2561         } elsif (! $filename) {
2562                 return 'application/octet-stream';
2563         } elsif ($filename =~ m/\.png$/i) {
2564                 return 'image/png';
2565         } elsif ($filename =~ m/\.gif$/i) {
2566                 return 'image/gif';
2567         } elsif ($filename =~ m/\.jpe?g$/i) {
2568                 return 'image/jpeg';
2569         } else {
2570                 return 'application/octet-stream';
2571         }
2572 }
2573
2574 sub blob_contenttype {
2575         my ($fd, $file_name, $type) = @_;
2576
2577         $type ||= blob_mimetype($fd, $file_name);
2578         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2579                 $type .= "; charset=$default_text_plain_charset";
2580         }
2581
2582         return $type;
2583 }
2584
2585 ## ======================================================================
2586 ## functions printing HTML: header, footer, error page
2587
2588 sub git_header_html {
2589         my $status = shift || "200 OK";
2590         my $expires = shift;
2591
2592         my $title = "$site_name";
2593         if (defined $project) {
2594                 $title .= " - " . to_utf8($project);
2595                 if (defined $action) {
2596                         $title .= "/$action";
2597                         if (defined $file_name) {
2598                                 $title .= " - " . esc_path($file_name);
2599                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2600                                         $title .= "/";
2601                                 }
2602                         }
2603                 }
2604         }
2605         my $content_type;
2606         # require explicit support from the UA if we are to send the page as
2607         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2608         # we have to do this because MSIE sometimes globs '*/*', pretending to
2609         # support xhtml+xml but choking when it gets what it asked for.
2610         if (defined $cgi->http('HTTP_ACCEPT') &&
2611             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2612             $cgi->Accept('application/xhtml+xml') != 0) {
2613                 $content_type = 'application/xhtml+xml';
2614         } else {
2615                 $content_type = 'text/html';
2616         }
2617         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2618                            -status=> $status, -expires => $expires);
2619         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2620         print <<EOF;
2621 <?xml version="1.0" encoding="utf-8"?>
2622 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2623 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2624 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2625 <!-- git core binaries version $git_version -->
2626 <head>
2627 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2628 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2629 <meta name="robots" content="index, nofollow"/>
2630 <title>$title</title>
2631 EOF
2632 # print out each stylesheet that exist
2633         if (defined $stylesheet) {
2634 #provides backwards capability for those people who define style sheet in a config file
2635                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2636         } else {
2637                 foreach my $stylesheet (@stylesheets) {
2638                         next unless $stylesheet;
2639                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2640                 }
2641         }
2642         if (defined $project) {
2643                 my %href_params = get_feed_info();
2644                 if (!exists $href_params{'-title'}) {
2645                         $href_params{'-title'} = 'log';
2646                 }
2647
2648                 foreach my $format qw(RSS Atom) {
2649                         my $type = lc($format);
2650                         my %link_attr = (
2651                                 '-rel' => 'alternate',
2652                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2653                                 '-type' => "application/$type+xml"
2654                         );
2655
2656                         $href_params{'action'} = $type;
2657                         $link_attr{'-href'} = href(%href_params);
2658                         print "<link ".
2659                               "rel=\"$link_attr{'-rel'}\" ".
2660                               "title=\"$link_attr{'-title'}\" ".
2661                               "href=\"$link_attr{'-href'}\" ".
2662                               "type=\"$link_attr{'-type'}\" ".
2663                               "/>\n";
2664
2665                         $href_params{'extra_options'} = '--no-merges';
2666                         $link_attr{'-href'} = href(%href_params);
2667                         $link_attr{'-title'} .= ' (no merges)';
2668                         print "<link ".
2669                               "rel=\"$link_attr{'-rel'}\" ".
2670                               "title=\"$link_attr{'-title'}\" ".
2671                               "href=\"$link_attr{'-href'}\" ".
2672                               "type=\"$link_attr{'-type'}\" ".
2673                               "/>\n";
2674                 }
2675
2676         } else {
2677                 printf('<link rel="alternate" title="%s projects list" '.
2678                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2679                        $site_name, href(project=>undef, action=>"project_index"));
2680                 printf('<link rel="alternate" title="%s projects feeds" '.
2681                        'href="%s" type="text/x-opml" />'."\n",
2682                        $site_name, href(project=>undef, action=>"opml"));
2683         }
2684         if (defined $favicon) {
2685                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2686         }
2687
2688         print "</head>\n" .
2689               "<body>\n";
2690
2691         if (-f $site_header) {
2692                 open (my $fd, $site_header);
2693                 print <$fd>;
2694                 close $fd;
2695         }
2696
2697         print "<div class=\"page_header\">\n" .
2698               $cgi->a({-href => esc_url($logo_url),
2699                        -title => $logo_label},
2700                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2701         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2702         if (defined $project) {
2703                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2704                 if (defined $action) {
2705                         print " / $action";
2706                 }
2707                 print "\n";
2708         }
2709         print "</div>\n";
2710
2711         my ($have_search) = gitweb_check_feature('search');
2712         if (defined $project && $have_search) {
2713                 if (!defined $searchtext) {
2714                         $searchtext = "";
2715                 }
2716                 my $search_hash;
2717                 if (defined $hash_base) {
2718                         $search_hash = $hash_base;
2719                 } elsif (defined $hash) {
2720                         $search_hash = $hash;
2721                 } else {
2722                         $search_hash = "HEAD";
2723                 }
2724                 my $action = $my_uri;
2725                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2726                 if ($use_pathinfo) {
2727                         $action .= "/".esc_url($project);
2728                 }
2729                 print $cgi->startform(-method => "get", -action => $action) .
2730                       "<div class=\"search\">\n" .
2731                       (!$use_pathinfo &&
2732                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2733                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2734                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2735                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2736                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2737                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2738                       " search:\n",
2739                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2740                       "<span title=\"Extended regular expression\">" .
2741                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2742                                      -checked => $search_use_regexp) .
2743                       "</span>" .
2744                       "</div>" .
2745                       $cgi->end_form() . "\n";
2746         }
2747 }
2748
2749 sub git_footer_html {
2750         my $feed_class = 'rss_logo';
2751
2752         print "<div class=\"page_footer\">\n";
2753         if (defined $project) {
2754                 my $descr = git_get_project_description($project);
2755                 if (defined $descr) {
2756                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2757                 }
2758
2759                 my %href_params = get_feed_info();
2760                 if (!%href_params) {
2761                         $feed_class .= ' generic';
2762                 }
2763                 $href_params{'-title'} ||= 'log';
2764
2765                 foreach my $format qw(RSS Atom) {
2766                         $href_params{'action'} = lc($format);
2767                         print $cgi->a({-href => href(%href_params),
2768                                       -title => "$href_params{'-title'} $format feed",
2769                                       -class => $feed_class}, $format)."\n";
2770                 }
2771
2772         } else {
2773                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2774                               -class => $feed_class}, "OPML") . " ";
2775                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2776                               -class => $feed_class}, "TXT") . "\n";
2777         }
2778         print "</div>\n"; # class="page_footer"
2779
2780         if (-f $site_footer) {
2781                 open (my $fd, $site_footer);
2782                 print <$fd>;
2783                 close $fd;
2784         }
2785
2786         print "</body>\n" .
2787               "</html>";
2788 }
2789
2790 # die_error(<http_status_code>, <error_message>)
2791 # Example: die_error(404, 'Hash not found')
2792 # By convention, use the following status codes (as defined in RFC 2616):
2793 # 400: Invalid or missing CGI parameters, or
2794 #      requested object exists but has wrong type.
2795 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2796 #      this server or project.
2797 # 404: Requested object/revision/project doesn't exist.
2798 # 500: The server isn't configured properly, or
2799 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2800 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2801 sub die_error {
2802         my $status = shift || 500;
2803         my $error = shift || "Internal server error";
2804
2805         my %http_responses = (400 => '400 Bad Request',
2806                               403 => '403 Forbidden',
2807                               404 => '404 Not Found',
2808                               500 => '500 Internal Server Error');
2809         git_header_html($http_responses{$status});
2810         print <<EOF;
2811 <div class="page_body">
2812 <br /><br />
2813 $status - $error
2814 <br />
2815 </div>
2816 EOF
2817         git_footer_html();
2818         exit;
2819 }
2820
2821 ## ----------------------------------------------------------------------
2822 ## functions printing or outputting HTML: navigation
2823
2824 sub git_print_page_nav {
2825         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2826         $extra = '' if !defined $extra; # pager or formats
2827
2828         my @navs = qw(summary shortlog log commit commitdiff tree);
2829         if ($suppress) {
2830                 @navs = grep { $_ ne $suppress } @navs;
2831         }
2832
2833         my %arg = map { $_ => {action=>$_} } @navs;
2834         if (defined $head) {
2835                 for (qw(commit commitdiff)) {
2836                         $arg{$_}{'hash'} = $head;
2837                 }
2838                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2839                         for (qw(shortlog log)) {
2840                                 $arg{$_}{'hash'} = $head;
2841                         }
2842                 }
2843         }
2844         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2845         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2846
2847         print "<div class=\"page_nav\">\n" .
2848                 (join " | ",
2849                  map { $_ eq $current ?
2850                        $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
2851                  } @navs);
2852         print "<br/>\n$extra<br/>\n" .
2853               "</div>\n";
2854 }
2855
2856 sub format_paging_nav {
2857         my ($action, $hash, $head, $page, $has_next_link) = @_;
2858         my $paging_nav;
2859
2860
2861         if ($hash ne $head || $page) {
2862                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2863         } else {
2864                 $paging_nav .= "HEAD";
2865         }
2866
2867         if ($page > 0) {
2868                 $paging_nav .= " &sdot; " .
2869                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2870                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2871         } else {
2872                 $paging_nav .= " &sdot; prev";
2873         }
2874
2875         if ($has_next_link) {
2876                 $paging_nav .= " &sdot; " .
2877                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2878                                  -accesskey => "n", -title => "Alt-n"}, "next");
2879         } else {
2880                 $paging_nav .= " &sdot; next";
2881         }
2882
2883         return $paging_nav;
2884 }
2885
2886 ## ......................................................................
2887 ## functions printing or outputting HTML: div
2888
2889 sub git_print_header_div {
2890         my ($action, $title, $hash, $hash_base) = @_;
2891         my %args = ();
2892
2893         $args{'action'} = $action;
2894         $args{'hash'} = $hash if $hash;
2895         $args{'hash_base'} = $hash_base if $hash_base;
2896
2897         print "<div class=\"header\">\n" .
2898               $cgi->a({-href => href(%args), -class => "title"},
2899               $title ? $title : $action) .
2900               "\n</div>\n";
2901 }
2902
2903 #sub git_print_authorship (\%) {
2904 sub git_print_authorship {
2905         my $co = shift;
2906
2907         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
2908         print "<div class=\"author_date\">" .
2909               esc_html($co->{'author_name'}) .
2910               " [$ad{'rfc2822'}";
2911         if ($ad{'hour_local'} < 6) {
2912                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
2913                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2914         } else {
2915                 printf(" (%02d:%02d %s)",
2916                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
2917         }
2918         print "]</div>\n";
2919 }
2920
2921 sub git_print_page_path {
2922         my $name = shift;
2923         my $type = shift;
2924         my $hb = shift;
2925
2926
2927         print "<div class=\"page_path\">";
2928         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
2929                       -title => 'tree root'}, to_utf8("[$project]"));
2930         print " / ";
2931         if (defined $name) {
2932                 my @dirname = split '/', $name;
2933                 my $basename = pop @dirname;
2934                 my $fullname = '';
2935
2936                 foreach my $dir (@dirname) {
2937                         $fullname .= ($fullname ? '/' : '') . $dir;
2938                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
2939                                                      hash_base=>$hb),
2940                                       -title => $fullname}, esc_path($dir));
2941                         print " / ";
2942                 }
2943                 if (defined $type && $type eq 'blob') {
2944                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
2945                                                      hash_base=>$hb),
2946                                       -title => $name}, esc_path($basename));
2947                 } elsif (defined $type && $type eq 'tree') {
2948                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
2949                                                      hash_base=>$hb),
2950                                       -title => $name}, esc_path($basename));
2951                         print " / ";
2952                 } else {
2953                         print esc_path($basename);
2954                 }
2955         }
2956         print "<br/></div>\n";
2957 }
2958
2959 # sub git_print_log (\@;%) {
2960 sub git_print_log ($;%) {
2961         my $log = shift;
2962         my %opts = @_;
2963
2964         if ($opts{'-remove_title'}) {
2965                 # remove title, i.e. first line of log
2966                 shift @$log;
2967         }
2968         # remove leading empty lines
2969         while (defined $log->[0] && $log->[0] eq "") {
2970                 shift @$log;
2971         }
2972
2973         # print log
2974         my $signoff = 0;
2975         my $empty = 0;
2976         foreach my $line (@$log) {
2977                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
2978                         $signoff = 1;
2979                         $empty = 0;
2980                         if (! $opts{'-remove_signoff'}) {
2981                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
2982                                 next;
2983                         } else {
2984                                 # remove signoff lines
2985                                 next;
2986                         }
2987                 } else {
2988                         $signoff = 0;
2989                 }
2990
2991                 # print only one empty line
2992                 # do not print empty line after signoff
2993                 if ($line eq "") {
2994                         next if ($empty || $signoff);
2995                         $empty = 1;
2996                 } else {
2997                         $empty = 0;
2998                 }
2999
3000                 print format_log_line_html($line) . "<br/>\n";
3001         }
3002
3003         if ($opts{'-final_empty_line'}) {
3004                 # end with single empty line
3005                 print "<br/>\n" unless $empty;
3006         }
3007 }
3008
3009 # return link target (what link points to)
3010 sub git_get_link_target {
3011         my $hash = shift;
3012         my $link_target;
3013
3014         # read link
3015         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3016                 or return;
3017         {
3018                 local $/;
3019                 $link_target = <$fd>;
3020         }
3021         close $fd
3022                 or return;
3023
3024         return $link_target;
3025 }
3026
3027 # given link target, and the directory (basedir) the link is in,
3028 # return target of link relative to top directory (top tree);
3029 # return undef if it is not possible (including absolute links).
3030 sub normalize_link_target {
3031         my ($link_target, $basedir, $hash_base) = @_;
3032
3033         # we can normalize symlink target only if $hash_base is provided
3034         return unless $hash_base;
3035
3036         # absolute symlinks (beginning with '/') cannot be normalized
3037         return if (substr($link_target, 0, 1) eq '/');
3038
3039         # normalize link target to path from top (root) tree (dir)
3040         my $path;
3041         if ($basedir) {
3042                 $path = $basedir . '/' . $link_target;
3043         } else {
3044                 # we are in top (root) tree (dir)
3045                 $path = $link_target;
3046         }
3047
3048         # remove //, /./, and /../
3049         my @path_parts;
3050         foreach my $part (split('/', $path)) {
3051                 # discard '.' and ''
3052                 next if (!$part || $part eq '.');
3053                 # handle '..'
3054                 if ($part eq '..') {
3055                         if (@path_parts) {
3056                                 pop @path_parts;
3057                         } else {
3058                                 # link leads outside repository (outside top dir)
3059                                 return;
3060                         }
3061                 } else {
3062                         push @path_parts, $part;
3063                 }
3064         }
3065         $path = join('/', @path_parts);
3066
3067         return $path;
3068 }
3069
3070 # print tree entry (row of git_tree), but without encompassing <tr> element
3071 sub git_print_tree_entry {
3072         my ($t, $basedir, $hash_base, $have_blame) = @_;
3073
3074         my %base_key = ();
3075         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3076
3077         # The format of a table row is: mode list link.  Where mode is
3078         # the mode of the entry, list is the name of the entry, an href,
3079         # and link is the action links of the entry.
3080
3081         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3082         if ($t->{'type'} eq "blob") {
3083                 print "<td class=\"list\">" .
3084                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3085                                                file_name=>"$basedir$t->{'name'}", %base_key),
3086                                 -class => "list"}, esc_path($t->{'name'}));
3087                 if (S_ISLNK(oct $t->{'mode'})) {
3088                         my $link_target = git_get_link_target($t->{'hash'});
3089                         if ($link_target) {
3090                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3091                                 if (defined $norm_target) {
3092                                         print " -> " .
3093                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3094                                                                      file_name=>$norm_target),
3095                                                        -title => $norm_target}, esc_path($link_target));
3096                                 } else {
3097                                         print " -> " . esc_path($link_target);
3098                                 }
3099                         }
3100                 }
3101                 print "</td>\n";
3102                 print "<td class=\"link\">";
3103                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3104                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3105                               "blob");
3106                 if ($have_blame) {
3107                         print " | " .
3108                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3109                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3110                                       "blame");
3111                 }
3112                 if (defined $hash_base) {
3113                         print " | " .
3114                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3115                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3116                                       "history");
3117                 }
3118                 print " | " .
3119                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3120                                                file_name=>"$basedir$t->{'name'}")},
3121                                 "raw");
3122                 print "</td>\n";
3123
3124         } elsif ($t->{'type'} eq "tree") {
3125                 print "<td class=\"list\">";
3126                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3127                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3128                               esc_path($t->{'name'}));
3129                 print "</td>\n";
3130                 print "<td class=\"link\">";
3131                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3132                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3133                               "tree");
3134                 if (defined $hash_base) {
3135                         print " | " .
3136                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3137                                                      file_name=>"$basedir$t->{'name'}")},
3138                                       "history");
3139                 }
3140                 print "</td>\n";
3141         } else {
3142                 # unknown object: we can only present history for it
3143                 # (this includes 'commit' object, i.e. submodule support)
3144                 print "<td class=\"list\">" .
3145                       esc_path($t->{'name'}) .
3146                       "</td>\n";
3147                 print "<td class=\"link\">";
3148                 if (defined $hash_base) {
3149                         print $cgi->a({-href => href(action=>"history",
3150                                                      hash_base=>$hash_base,
3151                                                      file_name=>"$basedir$t->{'name'}")},
3152                                       "history");
3153                 }
3154                 print "</td>\n";
3155         }
3156 }
3157
3158 ## ......................................................................
3159 ## functions printing large fragments of HTML
3160
3161 # get pre-image filenames for merge (combined) diff
3162 sub fill_from_file_info {
3163         my ($diff, @parents) = @_;
3164
3165         $diff->{'from_file'} = [ ];
3166         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3167         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3168                 if ($diff->{'status'}[$i] eq 'R' ||
3169                     $diff->{'status'}[$i] eq 'C') {
3170                         $diff->{'from_file'}[$i] =
3171                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3172                 }
3173         }
3174
3175         return $diff;
3176 }
3177
3178 # is current raw difftree line of file deletion
3179 sub is_deleted {
3180         my $diffinfo = shift;
3181
3182         return $diffinfo->{'to_id'} eq ('0' x 40);
3183 }
3184
3185 # does patch correspond to [previous] difftree raw line
3186 # $diffinfo  - hashref of parsed raw diff format
3187 # $patchinfo - hashref of parsed patch diff format
3188 #              (the same keys as in $diffinfo)
3189 sub is_patch_split {
3190         my ($diffinfo, $patchinfo) = @_;
3191
3192         return defined $diffinfo && defined $patchinfo
3193                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3194 }
3195
3196
3197 sub git_difftree_body {
3198         my ($difftree, $hash, @parents) = @_;
3199         my ($parent) = $parents[0];
3200         my ($have_blame) = gitweb_check_feature('blame');
3201         print "<div class=\"list_head\">\n";
3202         if ($#{$difftree} > 10) {
3203                 print(($#{$difftree} + 1) . " files changed:\n");
3204         }
3205         print "</div>\n";
3206
3207         print "<table class=\"" .
3208               (@parents > 1 ? "combined " : "") .
3209               "diff_tree\">\n";
3210
3211         # header only for combined diff in 'commitdiff' view
3212         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3213         if ($has_header) {
3214                 # table header
3215                 print "<thead><tr>\n" .
3216                        "<th></th><th></th>\n"; # filename, patchN link
3217                 for (my $i = 0; $i < @parents; $i++) {
3218                         my $par = $parents[$i];
3219                         print "<th>" .
3220                               $cgi->a({-href => href(action=>"commitdiff",
3221                                                      hash=>$hash, hash_parent=>$par),
3222                                        -title => 'commitdiff to parent number ' .
3223                                                   ($i+1) . ': ' . substr($par,0,7)},
3224                                       $i+1) .
3225                               "&nbsp;</th>\n";
3226                 }
3227                 print "</tr></thead>\n<tbody>\n";
3228         }
3229
3230         my $alternate = 1;
3231         my $patchno = 0;
3232         foreach my $line (@{$difftree}) {
3233                 my $diff = parsed_difftree_line($line);
3234
3235                 if ($alternate) {
3236                         print "<tr class=\"dark\">\n";
3237                 } else {
3238                         print "<tr class=\"light\">\n";
3239                 }
3240                 $alternate ^= 1;
3241
3242                 if (exists $diff->{'nparents'}) { # combined diff
3243
3244                         fill_from_file_info($diff, @parents)
3245                                 unless exists $diff->{'from_file'};
3246
3247                         if (!is_deleted($diff)) {
3248                                 # file exists in the result (child) commit
3249                                 print "<td>" .
3250                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3251                                                              file_name=>$diff->{'to_file'},
3252                                                              hash_base=>$hash),
3253                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3254                                       "</td>\n";
3255                         } else {
3256                                 print "<td>" .
3257                                       esc_path($diff->{'to_file'}) .
3258                                       "</td>\n";
3259                         }
3260
3261                         if ($action eq 'commitdiff') {
3262                                 # link to patch
3263                                 $patchno++;
3264                                 print "<td class=\"link\">" .
3265                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3266                                       " | " .
3267                                       "</td>\n";
3268                         }
3269
3270                         my $has_history = 0;
3271                         my $not_deleted = 0;
3272                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3273                                 my $hash_parent = $parents[$i];
3274                                 my $from_hash = $diff->{'from_id'}[$i];
3275                                 my $from_path = $diff->{'from_file'}[$i];
3276                                 my $status = $diff->{'status'}[$i];
3277
3278                                 $has_history ||= ($status ne 'A');
3279                                 $not_deleted ||= ($status ne 'D');
3280
3281                                 if ($status eq 'A') {
3282                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3283                                 } elsif ($status eq 'D') {
3284                                         print "<td class=\"link\">" .
3285                                               $cgi->a({-href => href(action=>"blob",
3286                                                                      hash_base=>$hash,
3287                                                                      hash=>$from_hash,
3288                                                                      file_name=>$from_path)},
3289                                                       "blob" . ($i+1)) .
3290                                               " | </td>\n";
3291                                 } else {
3292                                         if ($diff->{'to_id'} eq $from_hash) {
3293                                                 print "<td class=\"link nochange\">";
3294                                         } else {
3295                                                 print "<td class=\"link\">";
3296                                         }
3297                                         print $cgi->a({-href => href(action=>"blobdiff",
3298                                                                      hash=>$diff->{'to_id'},
3299                                                                      hash_parent=>$from_hash,
3300                                                                      hash_base=>$hash,
3301                                                                      hash_parent_base=>$hash_parent,
3302                                                                      file_name=>$diff->{'to_file'},
3303                                                                      file_parent=>$from_path)},
3304                                                       "diff" . ($i+1)) .
3305                                               " | </td>\n";
3306                                 }
3307                         }
3308
3309                         print "<td class=\"link\">";
3310                         if ($not_deleted) {
3311                                 print $cgi->a({-href => href(action=>"blob",
3312                                                              hash=>$diff->{'to_id'},
3313                                                              file_name=>$diff->{'to_file'},
3314                                                              hash_base=>$hash)},
3315                                               "blob");
3316                                 print " | " if ($has_history);
3317                         }
3318                         if ($has_history) {
3319                                 print $cgi->a({-href => href(action=>"history",
3320                                                              file_name=>$diff->{'to_file'},
3321                                                              hash_base=>$hash)},
3322                                               "history");
3323                         }
3324                         print "</td>\n";
3325
3326                         print "</tr>\n";
3327                         next; # instead of 'else' clause, to avoid extra indent
3328                 }
3329                 # else ordinary diff
3330
3331                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3332                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3333                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3334                         $to_mode_oct = oct $diff->{'to_mode'};
3335                         if (S_ISREG($to_mode_oct)) { # only for regular file
3336                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3337                         }
3338                         $to_file_type = file_type($diff->{'to_mode'});
3339                 }
3340                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3341                         $from_mode_oct = oct $diff->{'from_mode'};
3342                         if (S_ISREG($to_mode_oct)) { # only for regular file
3343                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3344                         }
3345                         $from_file_type = file_type($diff->{'from_mode'});
3346                 }
3347
3348                 if ($diff->{'status'} eq "A") { # created
3349                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3350                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3351                         $mode_chng   .= "]</span>";
3352                         print "<td>";
3353                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3354                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3355                                       -class => "list"}, esc_path($diff->{'file'}));
3356                         print "</td>\n";
3357                         print "<td>$mode_chng</td>\n";
3358                         print "<td class=\"link\">";
3359                         if ($action eq 'commitdiff') {
3360                                 # link to patch
3361                                 $patchno++;
3362                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3363                                 print " | ";
3364                         }
3365                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3366                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3367                                       "blob");
3368                         print "</td>\n";
3369
3370                 } elsif ($diff->{'status'} eq "D") { # deleted
3371                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3372                         print "<td>";
3373                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3374                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3375                                        -class => "list"}, esc_path($diff->{'file'}));
3376                         print "</td>\n";
3377                         print "<td>$mode_chng</td>\n";
3378                         print "<td class=\"link\">";
3379                         if ($action eq 'commitdiff') {
3380                                 # link to patch
3381                                 $patchno++;
3382                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3383                                 print " | ";
3384                         }
3385                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3386                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3387                                       "blob") . " | ";
3388                         if ($have_blame) {
3389                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3390                                                              file_name=>$diff->{'file'})},
3391                                               "blame") . " | ";
3392                         }
3393                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3394                                                      file_name=>$diff->{'file'})},
3395                                       "history");
3396                         print "</td>\n";
3397
3398                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3399                         my $mode_chnge = "";
3400                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3401                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3402                                 if ($from_file_type ne $to_file_type) {
3403                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3404                                 }
3405                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3406                                         if ($from_mode_str && $to_mode_str) {
3407                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3408                                         } elsif ($to_mode_str) {
3409                                                 $mode_chnge .= " mode: $to_mode_str";
3410                                         }
3411                                 }
3412                                 $mode_chnge .= "]</span>\n";
3413                         }
3414                         print "<td>";
3415                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3416                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3417                                       -class => "list"}, esc_path($diff->{'file'}));
3418                         print "</td>\n";
3419                         print "<td>$mode_chnge</td>\n";
3420                         print "<td class=\"link\">";
3421                         if ($action eq 'commitdiff') {
3422                                 # link to patch
3423                                 $patchno++;
3424                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3425                                       " | ";
3426                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3427                                 # "commit" view and modified file (not onlu mode changed)
3428                                 print $cgi->a({-href => href(action=>"blobdiff",
3429                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3430                                                              hash_base=>$hash, hash_parent_base=>$parent,
3431                                                              file_name=>$diff->{'file'})},
3432                                               "diff") .
3433                                       " | ";
3434                         }
3435                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3436                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3437                                        "blob") . " | ";
3438                         if ($have_blame) {
3439                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3440                                                              file_name=>$diff->{'file'})},
3441                                               "blame") . " | ";
3442                         }
3443                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3444                                                      file_name=>$diff->{'file'})},
3445                                       "history");
3446                         print "</td>\n";
3447
3448                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3449                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3450                         my $nstatus = $status_name{$diff->{'status'}};
3451                         my $mode_chng = "";
3452                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3453                                 # mode also for directories, so we cannot use $to_mode_str
3454                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3455                         }
3456                         print "<td>" .
3457                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3458                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3459                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3460                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3461                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3462                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3463                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3464                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3465                               "<td class=\"link\">";
3466                         if ($action eq 'commitdiff') {
3467                                 # link to patch
3468                                 $patchno++;
3469                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3470                                       " | ";
3471                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3472                                 # "commit" view and modified file (not only pure rename or copy)
3473                                 print $cgi->a({-href => href(action=>"blobdiff",
3474                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3475                                                              hash_base=>$hash, hash_parent_base=>$parent,
3476                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3477                                               "diff") .
3478                                       " | ";
3479                         }
3480                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3481                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3482                                       "blob") . " | ";
3483                         if ($have_blame) {
3484                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3485                                                              file_name=>$diff->{'to_file'})},
3486                                               "blame") . " | ";
3487                         }
3488                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3489                                                     file_name=>$diff->{'to_file'})},
3490                                       "history");
3491                         print "</td>\n";
3492
3493                 } # we should not encounter Unmerged (U) or Unknown (X) status
3494                 print "</tr>\n";
3495         }
3496         print "</tbody>" if $has_header;
3497         print "</table>\n";
3498 }
3499
3500 sub git_patchset_body {
3501         my ($fd, $difftree, $hash, @hash_parents) = @_;
3502         my ($hash_parent) = $hash_parents[0];
3503
3504         my $is_combined = (@hash_parents > 1);
3505         my $patch_idx = 0;
3506         my $patch_number = 0;
3507         my $patch_line;
3508         my $diffinfo;
3509         my $to_name;
3510         my (%from, %to);
3511
3512         print "<div class=\"patchset\">\n";
3513
3514         # skip to first patch
3515         while ($patch_line = <$fd>) {
3516                 chomp $patch_line;
3517
3518                 last if ($patch_line =~ m/^diff /);
3519         }
3520
3521  PATCH:
3522         while ($patch_line) {
3523
3524                 # parse "git diff" header line
3525                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3526                         # $1 is from_name, which we do not use
3527                         $to_name = unquote($2);
3528                         $to_name =~ s!^b/!!;
3529                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3530                         # $1 is 'cc' or 'combined', which we do not use
3531                         $to_name = unquote($2);
3532                 } else {
3533                         $to_name = undef;
3534                 }
3535
3536                 # check if current patch belong to current raw line
3537                 # and parse raw git-diff line if needed
3538                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3539                         # this is continuation of a split patch
3540                         print "<div class=\"patch cont\">\n";
3541                 } else {
3542                         # advance raw git-diff output if needed
3543                         $patch_idx++ if defined $diffinfo;
3544
3545                         # read and prepare patch information
3546                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3547
3548                         # compact combined diff output can have some patches skipped
3549                         # find which patch (using pathname of result) we are at now;
3550                         if ($is_combined) {
3551                                 while ($to_name ne $diffinfo->{'to_file'}) {
3552                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3553                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3554                                               "</div>\n";  # class="patch"
3555
3556                                         $patch_idx++;
3557                                         $patch_number++;
3558
3559                                         last if $patch_idx > $#$difftree;
3560                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3561                                 }
3562                         }
3563
3564                         # modifies %from, %to hashes
3565                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3566
3567                         # this is first patch for raw difftree line with $patch_idx index
3568                         # we index @$difftree array from 0, but number patches from 1
3569                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3570                 }
3571
3572                 # git diff header
3573                 #assert($patch_line =~ m/^diff /) if DEBUG;
3574                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3575                 $patch_number++;
3576                 # print "git diff" header
3577                 print format_git_diff_header_line($patch_line, $diffinfo,
3578                                                   \%from, \%to);
3579
3580                 # print extended diff header
3581                 print "<div class=\"diff extended_header\">\n";
3582         EXTENDED_HEADER:
3583                 while ($patch_line = <$fd>) {
3584                         chomp $patch_line;
3585
3586                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3587
3588                         print format_extended_diff_header_line($patch_line, $diffinfo,
3589                                                                \%from, \%to);
3590                 }
3591                 print "</div>\n"; # class="diff extended_header"
3592
3593                 # from-file/to-file diff header
3594                 if (! $patch_line) {
3595                         print "</div>\n"; # class="patch"
3596                         last PATCH;
3597                 }
3598                 next PATCH if ($patch_line =~ m/^diff /);
3599                 #assert($patch_line =~ m/^---/) if DEBUG;
3600
3601                 my $last_patch_line = $patch_line;
3602                 $patch_line = <$fd>;
3603                 chomp $patch_line;
3604                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3605
3606                 print format_diff_from_to_header($last_patch_line, $patch_line,
3607                                                  $diffinfo, \%from, \%to,
3608                                                  @hash_parents);
3609
3610                 # the patch itself
3611         LINE:
3612                 while ($patch_line = <$fd>) {
3613                         chomp $patch_line;
3614
3615                         next PATCH if ($patch_line =~ m/^diff /);
3616
3617                         print format_diff_line($patch_line, \%from, \%to);
3618                 }
3619
3620         } continue {
3621                 print "</div>\n"; # class="patch"
3622         }
3623
3624         # for compact combined (--cc) format, with chunk and patch simpliciaction
3625         # patchset might be empty, but there might be unprocessed raw lines
3626         for (++$patch_idx if $patch_number > 0;
3627              $patch_idx < @$difftree;
3628              ++$patch_idx) {
3629                 # read and prepare patch information
3630                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3631
3632                 # generate anchor for "patch" links in difftree / whatchanged part
3633                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3634                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3635                       "</div>\n";  # class="patch"
3636
3637                 $patch_number++;
3638         }
3639
3640         if ($patch_number == 0) {
3641                 if (@hash_parents > 1) {
3642                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3643                 } else {
3644                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3645                 }
3646         }
3647
3648         print "</div>\n"; # class="patchset"
3649 }
3650
3651 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3652
3653 # fills project list info (age, description, owner, forks) for each
3654 # project in the list, removing invalid projects from returned list
3655 # NOTE: modifies $projlist, but does not remove entries from it
3656 sub fill_project_list_info {
3657         my ($projlist, $check_forks) = @_;
3658         my @projects;
3659
3660         my $show_ctags = gitweb_check_feature('ctags');
3661  PROJECT:
3662         foreach my $pr (@$projlist) {
3663                 my (@activity) = git_get_last_activity($pr->{'path'});
3664                 unless (@activity) {
3665                         next PROJECT;
3666                 }
3667                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3668                 if (!defined $pr->{'descr'}) {
3669                         my $descr = git_get_project_description($pr->{'path'}) || "";
3670                         $descr = to_utf8($descr);
3671                         $pr->{'descr_long'} = $descr;
3672                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3673                 }
3674                 if (!defined $pr->{'owner'}) {
3675                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3676                 }
3677                 if ($check_forks) {
3678                         my $pname = $pr->{'path'};
3679                         if (($pname =~ s/\.git$//) &&
3680                             ($pname !~ /\/$/) &&
3681                             (-d "$projectroot/$pname")) {
3682                                 $pr->{'forks'} = "-d $projectroot/$pname";
3683                         }       else {
3684                                 $pr->{'forks'} = 0;
3685                         }
3686                 }
3687                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3688                 push @projects, $pr;
3689         }
3690
3691         return @projects;
3692 }
3693
3694 # print 'sort by' <th> element, either sorting by $key if $name eq $order
3695 # (changing $list), or generating 'sort by $name' replay link otherwise
3696 sub print_sort_th {
3697         my ($str_sort, $name, $order, $key, $header, $list) = @_;
3698         $key    ||= $name;
3699         $header ||= ucfirst($name);
3700
3701         if ($order eq $name) {
3702                 if ($str_sort) {
3703                         @$list = sort {$a->{$key} cmp $b->{$key}} @$list;
3704                 } else {
3705                         @$list = sort {$a->{$key} <=> $b->{$key}} @$list;
3706                 }
3707                 print "<th>$header</th>\n";
3708         } else {
3709                 print "<th>" .
3710                       $cgi->a({-href => href(-replay=>1, order=>$name),
3711                                -class => "header"}, $header) .
3712                       "</th>\n";
3713         }
3714 }
3715
3716 sub print_sort_th_str {
3717         print_sort_th(1, @_);
3718 }
3719
3720 sub print_sort_th_num {
3721         print_sort_th(0, @_);
3722 }
3723
3724 sub git_project_list_body {
3725         # actually uses global variable $project
3726         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3727
3728         my ($check_forks) = gitweb_check_feature('forks');
3729         my @projects = fill_project_list_info($projlist, $check_forks);
3730
3731         $order ||= $default_projects_order;
3732         $from = 0 unless defined $from;
3733         $to = $#projects if (!defined $to || $#projects < $to);
3734
3735         my $show_ctags = gitweb_check_feature('ctags');
3736         if ($show_ctags) {
3737                 my %ctags;
3738                 foreach my $p (@projects) {
3739                         foreach my $ct (keys %{$p->{'ctags'}}) {
3740                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3741                         }
3742                 }
3743                 my $cloud = git_populate_project_tagcloud(\%ctags);
3744                 print git_show_project_tagcloud($cloud, 64);
3745         }
3746
3747         print "<table class=\"project_list\">\n";
3748         unless ($no_header) {
3749                 print "<tr>\n";
3750                 if ($check_forks) {
3751                         print "<th></th>\n";
3752                 }
3753                 print_sort_th_str('project', $order, 'path',
3754                                   'Project', \@projects);
3755                 print_sort_th_str('descr', $order, 'descr_long',
3756                                   'Description', \@projects);
3757                 print_sort_th_str('owner', $order, 'owner',
3758                                   'Owner', \@projects);
3759                 print_sort_th_num('age', $order, 'age',
3760                                   'Last Change', \@projects);
3761                 print "<th></th>\n" . # for links
3762                       "</tr>\n";
3763         }
3764         my $alternate = 1;
3765         my $tagfilter = $cgi->param('by_tag');
3766         for (my $i = $from; $i <= $to; $i++) {
3767                 my $pr = $projects[$i];
3768
3769                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3770                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
3771                         and not $pr->{'descr_long'} =~ /$searchtext/;
3772                 # Weed out forks or non-matching entries of search
3773                 if ($check_forks) {
3774                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
3775                         $forkbase="^$forkbase" if $forkbase;
3776                         next if not $searchtext and not $tagfilter and $show_ctags
3777                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
3778                 }
3779
3780                 if ($alternate) {
3781                         print "<tr class=\"dark\">\n";
3782                 } else {
3783                         print "<tr class=\"light\">\n";
3784                 }
3785                 $alternate ^= 1;
3786                 if ($check_forks) {
3787                         print "<td>";
3788                         if ($pr->{'forks'}) {
3789                                 print "<!-- $pr->{'forks'} -->\n";
3790                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3791                         }
3792                         print "</td>\n";
3793                 }
3794                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3795                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3796                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3797                                         -class => "list", -title => $pr->{'descr_long'}},
3798                                         esc_html($pr->{'descr'})) . "</td>\n" .
3799                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3800                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3801                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3802                       "<td class=\"link\">" .
3803                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3804                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3805                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3806                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3807                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3808                       "</td>\n" .
3809                       "</tr>\n";
3810         }
3811         if (defined $extra) {
3812                 print "<tr>\n";
3813                 if ($check_forks) {
3814                         print "<td></td>\n";
3815                 }
3816                 print "<td colspan=\"5\">$extra</td>\n" .
3817                       "</tr>\n";
3818         }
3819         print "</table>\n";
3820 }
3821
3822 sub git_shortlog_body {
3823         # uses global variable $project
3824         my ($commitlist, $from, $to, $refs, $extra) = @_;
3825
3826         $from = 0 unless defined $from;
3827         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3828
3829         print "<table class=\"shortlog\">\n";
3830         my $alternate = 1;
3831         for (my $i = $from; $i <= $to; $i++) {
3832                 my %co = %{$commitlist->[$i]};
3833                 my $commit = $co{'id'};
3834                 my $ref = format_ref_marker($refs, $commit);
3835                 if ($alternate) {
3836                         print "<tr class=\"dark\">\n";
3837                 } else {
3838                         print "<tr class=\"light\">\n";
3839                 }
3840                 $alternate ^= 1;
3841                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3842                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3843                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3844                       "<td><i>" . $author . "</i></td>\n" .
3845                       "<td>";
3846                 print format_subject_html($co{'title'}, $co{'title_short'},
3847                                           href(action=>"commit", hash=>$commit), $ref);
3848                 print "</td>\n" .
3849                       "<td class=\"link\">" .
3850                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3851                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3852                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3853                 my $snapshot_links = format_snapshot_links($commit);
3854                 if (defined $snapshot_links) {
3855                         print " | " . $snapshot_links;
3856                 }
3857                 print "</td>\n" .
3858                       "</tr>\n";
3859         }
3860         if (defined $extra) {
3861                 print "<tr>\n" .
3862                       "<td colspan=\"4\">$extra</td>\n" .
3863                       "</tr>\n";
3864         }
3865         print "</table>\n";
3866 }
3867
3868 sub git_history_body {
3869         # Warning: assumes constant type (blob or tree) during history
3870         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3871
3872         $from = 0 unless defined $from;
3873         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3874
3875         print "<table class=\"history\">\n";
3876         my $alternate = 1;
3877         for (my $i = $from; $i <= $to; $i++) {
3878                 my %co = %{$commitlist->[$i]};
3879                 if (!%co) {
3880                         next;
3881                 }
3882                 my $commit = $co{'id'};
3883
3884                 my $ref = format_ref_marker($refs, $commit);
3885
3886                 if ($alternate) {
3887                         print "<tr class=\"dark\">\n";
3888                 } else {
3889                         print "<tr class=\"light\">\n";
3890                 }
3891                 $alternate ^= 1;
3892         # shortlog uses      chop_str($co{'author_name'}, 10)
3893                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3894                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3895                       "<td><i>" . $author . "</i></td>\n" .
3896                       "<td>";
3897                 # originally git_history used chop_str($co{'title'}, 50)
3898                 print format_subject_html($co{'title'}, $co{'title_short'},
3899                                           href(action=>"commit", hash=>$commit), $ref);
3900                 print "</td>\n" .
3901                       "<td class=\"link\">" .
3902                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
3903                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
3904
3905                 if ($ftype eq 'blob') {
3906                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
3907                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
3908                         if (defined $blob_current && defined $blob_parent &&
3909                                         $blob_current ne $blob_parent) {
3910                                 print " | " .
3911                                         $cgi->a({-href => href(action=>"blobdiff",
3912                                                                hash=>$blob_current, hash_parent=>$blob_parent,
3913                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
3914                                                                file_name=>$file_name)},
3915                                                 "diff to current");
3916                         }
3917                 }
3918                 print "</td>\n" .
3919                       "</tr>\n";
3920         }
3921         if (defined $extra) {
3922                 print "<tr>\n" .
3923                       "<td colspan=\"4\">$extra</td>\n" .
3924                       "</tr>\n";
3925         }
3926         print "</table>\n";
3927 }
3928
3929 sub git_tags_body {
3930         # uses global variable $project
3931         my ($taglist, $from, $to, $extra) = @_;
3932         $from = 0 unless defined $from;
3933         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
3934
3935         print "<table class=\"tags\">\n";
3936         my $alternate = 1;
3937         for (my $i = $from; $i <= $to; $i++) {
3938                 my $entry = $taglist->[$i];
3939                 my %tag = %$entry;
3940                 my $comment = $tag{'subject'};
3941                 my $comment_short;
3942                 if (defined $comment) {
3943                         $comment_short = chop_str($comment, 30, 5);
3944                 }
3945                 if ($alternate) {
3946                         print "<tr class=\"dark\">\n";
3947                 } else {
3948                         print "<tr class=\"light\">\n";
3949                 }
3950                 $alternate ^= 1;
3951                 if (defined $tag{'age'}) {
3952                         print "<td><i>$tag{'age'}</i></td>\n";
3953                 } else {
3954                         print "<td></td>\n";
3955                 }
3956                 print "<td>" .
3957                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
3958                                -class => "list name"}, esc_html($tag{'name'})) .
3959                       "</td>\n" .
3960                       "<td>";
3961                 if (defined $comment) {
3962                         print format_subject_html($comment, $comment_short,
3963                                                   href(action=>"tag", hash=>$tag{'id'}));
3964                 }
3965                 print "</td>\n" .
3966                       "<td class=\"selflink\">";
3967                 if ($tag{'type'} eq "tag") {
3968                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
3969                 } else {
3970                         print "&nbsp;";
3971                 }
3972                 print "</td>\n" .
3973                       "<td class=\"link\">" . " | " .
3974                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
3975                 if ($tag{'reftype'} eq "commit") {
3976                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
3977                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
3978                 } elsif ($tag{'reftype'} eq "blob") {
3979                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
3980                 }
3981                 print "</td>\n" .
3982                       "</tr>";
3983         }
3984         if (defined $extra) {
3985                 print "<tr>\n" .
3986                       "<td colspan=\"5\">$extra</td>\n" .
3987                       "</tr>\n";
3988         }
3989         print "</table>\n";
3990 }
3991
3992 sub git_heads_body {
3993         # uses global variable $project
3994         my ($headlist, $head, $from, $to, $extra) = @_;
3995         $from = 0 unless defined $from;
3996         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
3997
3998         print "<table class=\"heads\">\n";
3999         my $alternate = 1;
4000         for (my $i = $from; $i <= $to; $i++) {
4001                 my $entry = $headlist->[$i];
4002                 my %ref = %$entry;
4003                 my $curr = $ref{'id'} eq $head;
4004                 if ($alternate) {
4005                         print "<tr class=\"dark\">\n";
4006                 } else {
4007                         print "<tr class=\"light\">\n";
4008                 }
4009                 $alternate ^= 1;
4010                 print "<td><i>$ref{'age'}</i></td>\n" .
4011                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4012                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4013                                -class => "list name"},esc_html($ref{'name'})) .
4014                       "</td>\n" .
4015                       "<td class=\"link\">" .
4016                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4017                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4018                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4019                       "</td>\n" .
4020                       "</tr>";
4021         }
4022         if (defined $extra) {
4023                 print "<tr>\n" .
4024                       "<td colspan=\"3\">$extra</td>\n" .
4025                       "</tr>\n";
4026         }
4027         print "</table>\n";
4028 }
4029
4030 sub git_search_grep_body {
4031         my ($commitlist, $from, $to, $extra) = @_;
4032         $from = 0 unless defined $from;
4033         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4034
4035         print "<table class=\"commit_search\">\n";
4036         my $alternate = 1;
4037         for (my $i = $from; $i <= $to; $i++) {
4038                 my %co = %{$commitlist->[$i]};
4039                 if (!%co) {
4040                         next;
4041                 }
4042                 my $commit = $co{'id'};
4043                 if ($alternate) {
4044                         print "<tr class=\"dark\">\n";
4045                 } else {
4046                         print "<tr class=\"light\">\n";
4047                 }
4048                 $alternate ^= 1;
4049                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4050                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4051                       "<td><i>" . $author . "</i></td>\n" .
4052                       "<td>" .
4053                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4054                                -class => "list subject"},
4055                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4056                 my $comment = $co{'comment'};
4057                 foreach my $line (@$comment) {
4058                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4059                                 my ($lead, $match, $trail) = ($1, $2, $3);
4060                                 $match = chop_str($match, 70, 5, 'center');
4061                                 my $contextlen = int((80 - length($match))/2);
4062                                 $contextlen = 30 if ($contextlen > 30);
4063                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4064                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4065
4066                                 $lead  = esc_html($lead);
4067                                 $match = esc_html($match);
4068                                 $trail = esc_html($trail);
4069
4070                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4071                         }
4072                 }
4073                 print "</td>\n" .
4074                       "<td class=\"link\">" .
4075                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4076                       " | " .
4077                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4078                       " | " .
4079                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4080                 print "</td>\n" .
4081                       "</tr>\n";
4082         }
4083         if (defined $extra) {
4084                 print "<tr>\n" .
4085                       "<td colspan=\"3\">$extra</td>\n" .
4086                       "</tr>\n";
4087         }
4088         print "</table>\n";
4089 }
4090
4091 ## ======================================================================
4092 ## ======================================================================
4093 ## actions
4094
4095 sub git_project_list {
4096         my $order = $cgi->param('o');
4097         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4098                 die_error(400, "Unknown order parameter");
4099         }
4100
4101         my @list = git_get_projects_list();
4102         if (!@list) {
4103                 die_error(404, "No projects found");
4104         }
4105
4106         git_header_html();
4107         if (-f $home_text) {
4108                 print "<div class=\"index_include\">\n";
4109                 open (my $fd, $home_text);
4110                 print <$fd>;
4111                 close $fd;
4112                 print "</div>\n";
4113         }
4114         print $cgi->startform(-method => "get") .
4115               "<p class=\"projsearch\">Search:\n" .
4116               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4117               "</p>" .
4118               $cgi->end_form() . "\n";
4119         git_project_list_body(\@list, $order);
4120         git_footer_html();
4121 }
4122
4123 sub git_forks {
4124         my $order = $cgi->param('o');
4125         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4126                 die_error(400, "Unknown order parameter");
4127         }
4128
4129         my @list = git_get_projects_list($project);
4130         if (!@list) {
4131                 die_error(404, "No forks found");
4132         }
4133
4134         git_header_html();
4135         git_print_page_nav('','');
4136         git_print_header_div('summary', "$project forks");
4137         git_project_list_body(\@list, $order);
4138         git_footer_html();
4139 }
4140
4141 sub git_project_index {
4142         my @projects = git_get_projects_list($project);
4143
4144         print $cgi->header(
4145                 -type => 'text/plain',
4146                 -charset => 'utf-8',
4147                 -content_disposition => 'inline; filename="index.aux"');
4148
4149         foreach my $pr (@projects) {
4150                 if (!exists $pr->{'owner'}) {
4151                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4152                 }
4153
4154                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4155                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4156                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4157                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4158                 $path  =~ s/ /\+/g;
4159                 $owner =~ s/ /\+/g;
4160
4161                 print "$path $owner\n";
4162         }
4163 }
4164
4165 sub git_summary {
4166         my $descr = git_get_project_description($project) || "none";
4167         my %co = parse_commit("HEAD");
4168         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4169         my $head = $co{'id'};
4170
4171         my $owner = git_get_project_owner($project);
4172
4173         my $refs = git_get_references();
4174         # These get_*_list functions return one more to allow us to see if
4175         # there are more ...
4176         my @taglist  = git_get_tags_list(16);
4177         my @headlist = git_get_heads_list(16);
4178         my @forklist;
4179         my ($check_forks) = gitweb_check_feature('forks');
4180
4181         if ($check_forks) {
4182                 @forklist = git_get_projects_list($project);
4183         }
4184
4185         git_header_html();
4186         git_print_page_nav('summary','', $head);
4187
4188         print "<div class=\"title\">&nbsp;</div>\n";
4189         print "<table class=\"projects_list\">\n" .
4190               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4191               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4192         if (defined $cd{'rfc2822'}) {
4193                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4194         }
4195
4196         # use per project git URL list in $projectroot/$project/cloneurl
4197         # or make project git URL from git base URL and project name
4198         my $url_tag = "URL";
4199         my @url_list = git_get_project_url_list($project);
4200         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4201         foreach my $git_url (@url_list) {
4202                 next unless $git_url;
4203                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4204                 $url_tag = "";
4205         }
4206
4207         # Tag cloud
4208         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4209         if ($show_ctags) {
4210                 my $ctags = git_get_project_ctags($project);
4211                 my $cloud = git_populate_project_tagcloud($ctags);
4212                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4213                 print "</td>\n<td>" unless %$ctags;
4214                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4215                 print "</td>\n<td>" if %$ctags;
4216                 print git_show_project_tagcloud($cloud, 48);
4217                 print "</td></tr>";
4218         }
4219
4220         print "</table>\n";
4221
4222         if (-s "$projectroot/$project/README.html") {
4223                 if (open my $fd, "$projectroot/$project/README.html") {
4224                         print "<div class=\"title\">readme</div>\n" .
4225                               "<div class=\"readme\">\n";
4226                         print $_ while (<$fd>);
4227                         print "\n</div>\n"; # class="readme"
4228                         close $fd;
4229                 }
4230         }
4231
4232         # we need to request one more than 16 (0..15) to check if
4233         # those 16 are all
4234         my @commitlist = $head ? parse_commits($head, 17) : ();
4235         if (@commitlist) {
4236                 git_print_header_div('shortlog');
4237                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4238                                   $#commitlist <=  15 ? undef :
4239                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4240         }
4241
4242         if (@taglist) {
4243                 git_print_header_div('tags');
4244                 git_tags_body(\@taglist, 0, 15,
4245                               $#taglist <=  15 ? undef :
4246                               $cgi->a({-href => href(action=>"tags")}, "..."));
4247         }
4248
4249         if (@headlist) {
4250                 git_print_header_div('heads');
4251                 git_heads_body(\@headlist, $head, 0, 15,
4252                                $#headlist <= 15 ? undef :
4253                                $cgi->a({-href => href(action=>"heads")}, "..."));
4254         }
4255
4256         if (@forklist) {
4257                 git_print_header_div('forks');
4258                 git_project_list_body(\@forklist, undef, 0, 15,
4259                                       $#forklist <= 15 ? undef :
4260                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4261                                       'noheader');
4262         }
4263
4264         git_footer_html();
4265 }
4266
4267 sub git_tag {
4268         my $head = git_get_head_hash($project);
4269         git_header_html();
4270         git_print_page_nav('','', $head,undef,$head);
4271         my %tag = parse_tag($hash);
4272
4273         if (! %tag) {
4274                 die_error(404, "Unknown tag object");
4275         }
4276
4277         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4278         print "<div class=\"title_text\">\n" .
4279               "<table class=\"object_header\">\n" .
4280               "<tr>\n" .
4281               "<td>object</td>\n" .
4282               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4283                                $tag{'object'}) . "</td>\n" .
4284               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4285                                               $tag{'type'}) . "</td>\n" .
4286               "</tr>\n";
4287         if (defined($tag{'author'})) {
4288                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4289                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4290                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4291                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4292                         "</td></tr>\n";
4293         }
4294         print "</table>\n\n" .
4295               "</div>\n";
4296         print "<div class=\"page_body\">";
4297         my $comment = $tag{'comment'};
4298         foreach my $line (@$comment) {
4299                 chomp $line;
4300                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4301         }
4302         print "</div>\n";
4303         git_footer_html();
4304 }
4305
4306 sub git_blame {
4307         my $fd;
4308         my $ftype;
4309
4310         gitweb_check_feature('blame')
4311             or die_error(403, "Blame view not allowed");
4312
4313         die_error(400, "No file name given") unless $file_name;
4314         $hash_base ||= git_get_head_hash($project);
4315         die_error(404, "Couldn't find base commit") unless ($hash_base);
4316         my %co = parse_commit($hash_base)
4317                 or die_error(404, "Commit not found");
4318         if (!defined $hash) {
4319                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4320                         or die_error(404, "Error looking up file");
4321         }
4322         $ftype = git_get_type($hash);
4323         if ($ftype !~ "blob") {
4324                 die_error(400, "Object is not a blob");
4325         }
4326         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4327               $file_name, $hash_base)
4328                 or die_error(500, "Open git-blame failed");
4329         git_header_html();
4330         my $formats_nav =
4331                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4332                         "blob") .
4333                 " | " .
4334                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4335                         "history") .
4336                 " | " .
4337                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4338                         "HEAD");
4339         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4340         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4341         git_print_page_path($file_name, $ftype, $hash_base);
4342         my @rev_color = (qw(light2 dark2));
4343         my $num_colors = scalar(@rev_color);
4344         my $current_color = 0;
4345         my $last_rev;
4346         print <<HTML;
4347 <div class="page_body">
4348 <table class="blame">
4349 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4350 HTML
4351         my %metainfo = ();
4352         while (1) {
4353                 $_ = <$fd>;
4354                 last unless defined $_;
4355                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4356                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4357                 if (!exists $metainfo{$full_rev}) {
4358                         $metainfo{$full_rev} = {};
4359                 }
4360                 my $meta = $metainfo{$full_rev};
4361                 while (<$fd>) {
4362                         last if (s/^\t//);
4363                         if (/^(\S+) (.*)$/) {
4364                                 $meta->{$1} = $2;
4365                         }
4366                 }
4367                 my $data = $_;
4368                 chomp $data;
4369                 my $rev = substr($full_rev, 0, 8);
4370                 my $author = $meta->{'author'};
4371                 my %date = parse_date($meta->{'author-time'},
4372                                       $meta->{'author-tz'});
4373                 my $date = $date{'iso-tz'};
4374                 if ($group_size) {
4375                         $current_color = ++$current_color % $num_colors;
4376                 }
4377                 print "<tr class=\"$rev_color[$current_color]\">\n";
4378                 if ($group_size) {
4379                         print "<td class=\"sha1\"";
4380                         print " title=\"". esc_html($author) . ", $date\"";
4381                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4382                         print ">";
4383                         print $cgi->a({-href => href(action=>"commit",
4384                                                      hash=>$full_rev,
4385                                                      file_name=>$file_name)},
4386                                       esc_html($rev));
4387                         print "</td>\n";
4388                 }
4389                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4390                         or die_error(500, "Open git-rev-parse failed");
4391                 my $parent_commit = <$dd>;
4392                 close $dd;
4393                 chomp($parent_commit);
4394                 my $blamed = href(action => 'blame',
4395                                   file_name => $meta->{'filename'},
4396                                   hash_base => $parent_commit);
4397                 print "<td class=\"linenr\">";
4398                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4399                                 -id => "l$lineno",
4400                                 -class => "linenr" },
4401                               esc_html($lineno));
4402                 print "</td>";
4403                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4404                 print "</tr>\n";
4405         }
4406         print "</table>\n";
4407         print "</div>";
4408         close $fd
4409                 or print "Reading blob failed\n";
4410         git_footer_html();
4411 }
4412
4413 sub git_tags {
4414         my $head = git_get_head_hash($project);
4415         git_header_html();
4416         git_print_page_nav('','', $head,undef,$head);
4417         git_print_header_div('summary', $project);
4418
4419         my @tagslist = git_get_tags_list();
4420         if (@tagslist) {
4421                 git_tags_body(\@tagslist);
4422         }
4423         git_footer_html();
4424 }
4425
4426 sub git_heads {
4427         my $head = git_get_head_hash($project);
4428         git_header_html();
4429         git_print_page_nav('','', $head,undef,$head);
4430         git_print_header_div('summary', $project);
4431
4432         my @headslist = git_get_heads_list();
4433         if (@headslist) {
4434                 git_heads_body(\@headslist, $head);
4435         }
4436         git_footer_html();
4437 }
4438
4439 sub git_blob_plain {
4440         my $type = shift;
4441         my $expires;
4442
4443         if (!defined $hash) {
4444                 if (defined $file_name) {
4445                         my $base = $hash_base || git_get_head_hash($project);
4446                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4447                                 or die_error(404, "Cannot find file");
4448                 } else {
4449                         die_error(400, "No file name defined");
4450                 }
4451         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4452                 # blobs defined by non-textual hash id's can be cached
4453                 $expires = "+1d";
4454         }
4455
4456         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4457                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4458
4459         # content-type (can include charset)
4460         $type = blob_contenttype($fd, $file_name, $type);
4461
4462         # "save as" filename, even when no $file_name is given
4463         my $save_as = "$hash";
4464         if (defined $file_name) {
4465                 $save_as = $file_name;
4466         } elsif ($type =~ m/^text\//) {
4467                 $save_as .= '.txt';
4468         }
4469
4470         print $cgi->header(
4471                 -type => $type,
4472                 -expires => $expires,
4473                 -content_disposition => 'inline; filename="' . $save_as . '"');
4474         undef $/;
4475         binmode STDOUT, ':raw';
4476         print <$fd>;
4477         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4478         $/ = "\n";
4479         close $fd;
4480 }
4481
4482 sub git_blob {
4483         my $expires;
4484
4485         if (!defined $hash) {
4486                 if (defined $file_name) {
4487                         my $base = $hash_base || git_get_head_hash($project);
4488                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4489                                 or die_error(404, "Cannot find file");
4490                 } else {
4491                         die_error(400, "No file name defined");
4492                 }
4493         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4494                 # blobs defined by non-textual hash id's can be cached
4495                 $expires = "+1d";
4496         }
4497
4498         my ($have_blame) = gitweb_check_feature('blame');
4499         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4500                 or die_error(500, "Couldn't cat $file_name, $hash");
4501         my $mimetype = blob_mimetype($fd, $file_name);
4502         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4503                 close $fd;
4504                 return git_blob_plain($mimetype);
4505         }
4506         # we can have blame only for text/* mimetype
4507         $have_blame &&= ($mimetype =~ m!^text/!);
4508
4509         git_header_html(undef, $expires);
4510         my $formats_nav = '';
4511         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4512                 if (defined $file_name) {
4513                         if ($have_blame) {
4514                                 $formats_nav .=
4515                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4516                                                 "blame") .
4517                                         " | ";
4518                         }
4519                         $formats_nav .=
4520                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4521                                         "history") .
4522                                 " | " .
4523                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4524                                         "raw") .
4525                                 " | " .
4526                                 $cgi->a({-href => href(action=>"blob",
4527                                                        hash_base=>"HEAD", file_name=>$file_name)},
4528                                         "HEAD");
4529                 } else {
4530                         $formats_nav .=
4531                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4532                                         "raw");
4533                 }
4534                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4535                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4536         } else {
4537                 print "<div class=\"page_nav\">\n" .
4538                       "<br/><br/></div>\n" .
4539                       "<div class=\"title\">$hash</div>\n";
4540         }
4541         git_print_page_path($file_name, "blob", $hash_base);
4542         print "<div class=\"page_body\">\n";
4543         if ($mimetype =~ m!^image/!) {
4544                 print qq!<img type="$mimetype"!;
4545                 if ($file_name) {
4546                         print qq! alt="$file_name" title="$file_name"!;
4547                 }
4548                 print qq! src="! .
4549                       href(action=>"blob_plain", hash=>$hash,
4550                            hash_base=>$hash_base, file_name=>$file_name) .
4551                       qq!" />\n!;
4552         } else {
4553                 my $nr;
4554                 while (my $line = <$fd>) {
4555                         chomp $line;
4556                         $nr++;
4557                         $line = untabify($line);
4558                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4559                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4560                 }
4561         }
4562         close $fd
4563                 or print "Reading blob failed.\n";
4564         print "</div>";
4565         git_footer_html();
4566 }
4567
4568 sub git_tree {
4569         if (!defined $hash_base) {
4570                 $hash_base = "HEAD";
4571         }
4572         if (!defined $hash) {
4573                 if (defined $file_name) {
4574                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4575                 } else {
4576                         $hash = $hash_base;
4577                 }
4578         }
4579         die_error(404, "No such tree") unless defined($hash);
4580         $/ = "\0";
4581         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4582                 or die_error(500, "Open git-ls-tree failed");
4583         my @entries = map { chomp; $_ } <$fd>;
4584         close $fd or die_error(404, "Reading tree failed");
4585         $/ = "\n";
4586
4587         my $refs = git_get_references();
4588         my $ref = format_ref_marker($refs, $hash_base);
4589         git_header_html();
4590         my $basedir = '';
4591         my ($have_blame) = gitweb_check_feature('blame');
4592         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4593                 my @views_nav = ();
4594                 if (defined $file_name) {
4595                         push @views_nav,
4596                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4597                                         "history"),
4598                                 $cgi->a({-href => href(action=>"tree",
4599                                                        hash_base=>"HEAD", file_name=>$file_name)},
4600                                         "HEAD"),
4601                 }
4602                 my $snapshot_links = format_snapshot_links($hash);
4603                 if (defined $snapshot_links) {
4604                         # FIXME: Should be available when we have no hash base as well.
4605                         push @views_nav, $snapshot_links;
4606                 }
4607                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4608                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4609         } else {
4610                 undef $hash_base;
4611                 print "<div class=\"page_nav\">\n";
4612                 print "<br/><br/></div>\n";
4613                 print "<div class=\"title\">$hash</div>\n";
4614         }
4615         if (defined $file_name) {
4616                 $basedir = $file_name;
4617                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4618                         $basedir .= '/';
4619                 }
4620                 git_print_page_path($file_name, 'tree', $hash_base);
4621         }
4622         print "<div class=\"page_body\">\n";
4623         print "<table class=\"tree\">\n";
4624         my $alternate = 1;
4625         # '..' (top directory) link if possible
4626         if (defined $hash_base &&
4627             defined $file_name && $file_name =~ m![^/]+$!) {
4628                 if ($alternate) {
4629                         print "<tr class=\"dark\">\n";
4630                 } else {
4631                         print "<tr class=\"light\">\n";
4632                 }
4633                 $alternate ^= 1;
4634
4635                 my $up = $file_name;
4636                 $up =~ s!/?[^/]+$!!;
4637                 undef $up unless $up;
4638                 # based on git_print_tree_entry
4639                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4640                 print '<td class="list">';
4641                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4642                                              file_name=>$up)},
4643                               "..");
4644                 print "</td>\n";
4645                 print "<td class=\"link\"></td>\n";
4646
4647                 print "</tr>\n";
4648         }
4649         foreach my $line (@entries) {
4650                 my %t = parse_ls_tree_line($line, -z => 1);
4651
4652                 if ($alternate) {
4653                         print "<tr class=\"dark\">\n";
4654                 } else {
4655                         print "<tr class=\"light\">\n";
4656                 }
4657                 $alternate ^= 1;
4658
4659                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4660
4661                 print "</tr>\n";
4662         }
4663         print "</table>\n" .
4664               "</div>";
4665         git_footer_html();
4666 }
4667
4668 sub git_snapshot {
4669         my @supported_fmts = gitweb_check_feature('snapshot');
4670         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4671
4672         my $format = $cgi->param('sf');
4673         if (!@supported_fmts) {
4674                 die_error(403, "Snapshots not allowed");
4675         }
4676         # default to first supported snapshot format
4677         $format ||= $supported_fmts[0];
4678         if ($format !~ m/^[a-z0-9]+$/) {
4679                 die_error(400, "Invalid snapshot format parameter");
4680         } elsif (!exists($known_snapshot_formats{$format})) {
4681                 die_error(400, "Unknown snapshot format");
4682         } elsif (!grep($_ eq $format, @supported_fmts)) {
4683                 die_error(403, "Unsupported snapshot format");
4684         }
4685
4686         if (!defined $hash) {
4687                 $hash = git_get_head_hash($project);
4688         }
4689
4690         my $name = $project;
4691         $name =~ s,([^/])/*\.git$,$1,;
4692         $name = basename($name);
4693         my $filename = to_utf8($name);
4694         $name =~ s/\047/\047\\\047\047/g;
4695         my $cmd;
4696         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4697         $cmd = quote_command(
4698                 git_cmd(), 'archive',
4699                 "--format=$known_snapshot_formats{$format}{'format'}",
4700                 "--prefix=$name/", $hash);
4701         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4702                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4703         }
4704
4705         print $cgi->header(
4706                 -type => $known_snapshot_formats{$format}{'type'},
4707                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4708                 -status => '200 OK');
4709
4710         open my $fd, "-|", $cmd
4711                 or die_error(500, "Execute git-archive failed");
4712         binmode STDOUT, ':raw';
4713         print <$fd>;
4714         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4715         close $fd;
4716 }
4717
4718 sub git_log {
4719         my $head = git_get_head_hash($project);
4720         if (!defined $hash) {
4721                 $hash = $head;
4722         }
4723         if (!defined $page) {
4724                 $page = 0;
4725         }
4726         my $refs = git_get_references();
4727
4728         my @commitlist = parse_commits($hash, 101, (100 * $page));
4729
4730         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4731
4732         git_header_html();
4733         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4734
4735         if (!@commitlist) {
4736                 my %co = parse_commit($hash);
4737
4738                 git_print_header_div('summary', $project);
4739                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4740         }
4741         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4742         for (my $i = 0; $i <= $to; $i++) {
4743                 my %co = %{$commitlist[$i]};
4744                 next if !%co;
4745                 my $commit = $co{'id'};
4746                 my $ref = format_ref_marker($refs, $commit);
4747                 my %ad = parse_date($co{'author_epoch'});
4748                 git_print_header_div('commit',
4749                                "<span class=\"age\">$co{'age_string'}</span>" .
4750                                esc_html($co{'title'}) . $ref,
4751                                $commit);
4752                 print "<div class=\"title_text\">\n" .
4753                       "<div class=\"log_link\">\n" .
4754                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4755                       " | " .
4756                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4757                       " | " .
4758                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4759                       "<br/>\n" .
4760                       "</div>\n" .
4761                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4762                       "</div>\n";
4763
4764                 print "<div class=\"log_body\">\n";
4765                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4766                 print "</div>\n";
4767         }
4768         if ($#commitlist >= 100) {
4769                 print "<div class=\"page_nav\">\n";
4770                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4771                                -accesskey => "n", -title => "Alt-n"}, "next");
4772                 print "</div>\n";
4773         }
4774         git_footer_html();
4775 }
4776
4777 sub git_commit {
4778         $hash ||= $hash_base || "HEAD";
4779         my %co = parse_commit($hash)
4780             or die_error(404, "Unknown commit object");
4781         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4782         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4783
4784         my $parent  = $co{'parent'};
4785         my $parents = $co{'parents'}; # listref
4786
4787         # we need to prepare $formats_nav before any parameter munging
4788         my $formats_nav;
4789         if (!defined $parent) {
4790                 # --root commitdiff
4791                 $formats_nav .= '(initial)';
4792         } elsif (@$parents == 1) {
4793                 # single parent commit
4794                 $formats_nav .=
4795                         '(parent: ' .
4796                         $cgi->a({-href => href(action=>"commit",
4797                                                hash=>$parent)},
4798                                 esc_html(substr($parent, 0, 7))) .
4799                         ')';
4800         } else {
4801                 # merge commit
4802                 $formats_nav .=
4803                         '(merge: ' .
4804                         join(' ', map {
4805                                 $cgi->a({-href => href(action=>"commit",
4806                                                        hash=>$_)},
4807                                         esc_html(substr($_, 0, 7)));
4808                         } @$parents ) .
4809                         ')';
4810         }
4811
4812         if (!defined $parent) {
4813                 $parent = "--root";
4814         }
4815         my @difftree;
4816         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4817                 @diff_opts,
4818                 (@$parents <= 1 ? $parent : '-c'),
4819                 $hash, "--"
4820                 or die_error(500, "Open git-diff-tree failed");
4821         @difftree = map { chomp; $_ } <$fd>;
4822         close $fd or die_error(404, "Reading git-diff-tree failed");
4823
4824         # non-textual hash id's can be cached
4825         my $expires;
4826         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4827                 $expires = "+1d";
4828         }
4829         my $refs = git_get_references();
4830         my $ref = format_ref_marker($refs, $co{'id'});
4831
4832         git_header_html(undef, $expires);
4833         git_print_page_nav('commit', '',
4834                            $hash, $co{'tree'}, $hash,
4835                            $formats_nav);
4836
4837         if (defined $co{'parent'}) {
4838                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4839         } else {
4840                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4841         }
4842         print "<div class=\"title_text\">\n" .
4843               "<table class=\"object_header\">\n";
4844         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4845               "<tr>" .
4846               "<td></td><td> $ad{'rfc2822'}";
4847         if ($ad{'hour_local'} < 6) {
4848                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4849                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4850         } else {
4851                 printf(" (%02d:%02d %s)",
4852                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4853         }
4854         print "</td>" .
4855               "</tr>\n";
4856         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4857         print "<tr><td></td><td> $cd{'rfc2822'}" .
4858               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4859               "</td></tr>\n";
4860         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4861         print "<tr>" .
4862               "<td>tree</td>" .
4863               "<td class=\"sha1\">" .
4864               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4865                        class => "list"}, $co{'tree'}) .
4866               "</td>" .
4867               "<td class=\"link\">" .
4868               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4869                       "tree");
4870         my $snapshot_links = format_snapshot_links($hash);
4871         if (defined $snapshot_links) {
4872                 print " | " . $snapshot_links;
4873         }
4874         print "</td>" .
4875               "</tr>\n";
4876
4877         foreach my $par (@$parents) {
4878                 print "<tr>" .
4879                       "<td>parent</td>" .
4880                       "<td class=\"sha1\">" .
4881                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4882                                class => "list"}, $par) .
4883                       "</td>" .
4884                       "<td class=\"link\">" .
4885                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4886                       " | " .
4887                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4888                       "</td>" .
4889                       "</tr>\n";
4890         }
4891         print "</table>".
4892               "</div>\n";
4893
4894         print "<div class=\"page_body\">\n";
4895         git_print_log($co{'comment'});
4896         print "</div>\n";
4897
4898         git_difftree_body(\@difftree, $hash, @$parents);
4899
4900         git_footer_html();
4901 }
4902
4903 sub git_object {
4904         # object is defined by:
4905         # - hash or hash_base alone
4906         # - hash_base and file_name
4907         my $type;
4908
4909         # - hash or hash_base alone
4910         if ($hash || ($hash_base && !defined $file_name)) {
4911                 my $object_id = $hash || $hash_base;
4912
4913                 open my $fd, "-|", quote_command(
4914                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
4915                         or die_error(404, "Object does not exist");
4916                 $type = <$fd>;
4917                 chomp $type;
4918                 close $fd
4919                         or die_error(404, "Object does not exist");
4920
4921         # - hash_base and file_name
4922         } elsif ($hash_base && defined $file_name) {
4923                 $file_name =~ s,/+$,,;
4924
4925                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
4926                         or die_error(404, "Base object does not exist");
4927
4928                 # here errors should not hapen
4929                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
4930                         or die_error(500, "Open git-ls-tree failed");
4931                 my $line = <$fd>;
4932                 close $fd;
4933
4934                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
4935                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
4936                         die_error(404, "File or directory for given base does not exist");
4937                 }
4938                 $type = $2;
4939                 $hash = $3;
4940         } else {
4941                 die_error(400, "Not enough information to find object");
4942         }
4943
4944         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
4945                                           hash=>$hash, hash_base=>$hash_base,
4946                                           file_name=>$file_name),
4947                              -status => '302 Found');
4948 }
4949
4950 sub git_blobdiff {
4951         my $format = shift || 'html';
4952
4953         my $fd;
4954         my @difftree;
4955         my %diffinfo;
4956         my $expires;
4957
4958         # preparing $fd and %diffinfo for git_patchset_body
4959         # new style URI
4960         if (defined $hash_base && defined $hash_parent_base) {
4961                 if (defined $file_name) {
4962                         # read raw output
4963                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4964                                 $hash_parent_base, $hash_base,
4965                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
4966                                 or die_error(500, "Open git-diff-tree failed");
4967                         @difftree = map { chomp; $_ } <$fd>;
4968                         close $fd
4969                                 or die_error(404, "Reading git-diff-tree failed");
4970                         @difftree
4971                                 or die_error(404, "Blob diff not found");
4972
4973                 } elsif (defined $hash &&
4974                          $hash =~ /[0-9a-fA-F]{40}/) {
4975                         # try to find filename from $hash
4976
4977                         # read filtered raw output
4978                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
4979                                 $hash_parent_base, $hash_base, "--"
4980                                 or die_error(500, "Open git-diff-tree failed");
4981                         @difftree =
4982                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
4983                                 # $hash == to_id
4984                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
4985                                 map { chomp; $_ } <$fd>;
4986                         close $fd
4987                                 or die_error(404, "Reading git-diff-tree failed");
4988                         @difftree
4989                                 or die_error(404, "Blob diff not found");
4990
4991                 } else {
4992                         die_error(400, "Missing one of the blob diff parameters");
4993                 }
4994
4995                 if (@difftree > 1) {
4996                         die_error(400, "Ambiguous blob diff specification");
4997                 }
4998
4999                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5000                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5001                 $file_name   ||= $diffinfo{'to_file'};
5002
5003                 $hash_parent ||= $diffinfo{'from_id'};
5004                 $hash        ||= $diffinfo{'to_id'};
5005
5006                 # non-textual hash id's can be cached
5007                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5008                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5009                         $expires = '+1d';
5010                 }
5011
5012                 # open patch output
5013                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5014                         '-p', ($format eq 'html' ? "--full-index" : ()),
5015                         $hash_parent_base, $hash_base,
5016                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5017                         or die_error(500, "Open git-diff-tree failed");
5018         }
5019
5020         # old/legacy style URI
5021         if (!%diffinfo && # if new style URI failed
5022             defined $hash && defined $hash_parent) {
5023                 # fake git-diff-tree raw output
5024                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5025                 $diffinfo{'from_id'} = $hash_parent;
5026                 $diffinfo{'to_id'}   = $hash;
5027                 if (defined $file_name) {
5028                         if (defined $file_parent) {
5029                                 $diffinfo{'status'} = '2';
5030                                 $diffinfo{'from_file'} = $file_parent;
5031                                 $diffinfo{'to_file'}   = $file_name;
5032                         } else { # assume not renamed
5033                                 $diffinfo{'status'} = '1';
5034                                 $diffinfo{'from_file'} = $file_name;
5035                                 $diffinfo{'to_file'}   = $file_name;
5036                         }
5037                 } else { # no filename given
5038                         $diffinfo{'status'} = '2';
5039                         $diffinfo{'from_file'} = $hash_parent;
5040                         $diffinfo{'to_file'}   = $hash;
5041                 }
5042
5043                 # non-textual hash id's can be cached
5044                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5045                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5046                         $expires = '+1d';
5047                 }
5048
5049                 # open patch output
5050                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5051                         '-p', ($format eq 'html' ? "--full-index" : ()),
5052                         $hash_parent, $hash, "--"
5053                         or die_error(500, "Open git-diff failed");
5054         } else  {
5055                 die_error(400, "Missing one of the blob diff parameters")
5056                         unless %diffinfo;
5057         }
5058
5059         # header
5060         if ($format eq 'html') {
5061                 my $formats_nav =
5062                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5063                                 "raw");
5064                 git_header_html(undef, $expires);
5065                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5066                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5067                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5068                 } else {
5069                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5070                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5071                 }
5072                 if (defined $file_name) {
5073                         git_print_page_path($file_name, "blob", $hash_base);
5074                 } else {
5075                         print "<div class=\"page_path\"></div>\n";
5076                 }
5077
5078         } elsif ($format eq 'plain') {
5079                 print $cgi->header(
5080                         -type => 'text/plain',
5081                         -charset => 'utf-8',
5082                         -expires => $expires,
5083                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5084
5085                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5086
5087         } else {
5088                 die_error(400, "Unknown blobdiff format");
5089         }
5090
5091         # patch
5092         if ($format eq 'html') {
5093                 print "<div class=\"page_body\">\n";
5094
5095                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5096                 close $fd;
5097
5098                 print "</div>\n"; # class="page_body"
5099                 git_footer_html();
5100
5101         } else {
5102                 while (my $line = <$fd>) {
5103                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5104                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5105
5106                         print $line;
5107
5108                         last if $line =~ m!^\+\+\+!;
5109                 }
5110                 local $/ = undef;
5111                 print <$fd>;
5112                 close $fd;
5113         }
5114 }
5115
5116 sub git_blobdiff_plain {
5117         git_blobdiff('plain');
5118 }
5119
5120 sub git_commitdiff {
5121         my $format = shift || 'html';
5122         $hash ||= $hash_base || "HEAD";
5123         my %co = parse_commit($hash)
5124             or die_error(404, "Unknown commit object");
5125
5126         # choose format for commitdiff for merge
5127         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5128                 $hash_parent = '--cc';
5129         }
5130         # we need to prepare $formats_nav before almost any parameter munging
5131         my $formats_nav;
5132         if ($format eq 'html') {
5133                 $formats_nav =
5134                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5135                                 "raw");
5136
5137                 if (defined $hash_parent &&
5138                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5139                         # commitdiff with two commits given
5140                         my $hash_parent_short = $hash_parent;
5141                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5142                                 $hash_parent_short = substr($hash_parent, 0, 7);
5143                         }
5144                         $formats_nav .=
5145                                 ' (from';
5146                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5147                                 if ($co{'parents'}[$i] eq $hash_parent) {
5148                                         $formats_nav .= ' parent ' . ($i+1);
5149                                         last;
5150                                 }
5151                         }
5152                         $formats_nav .= ': ' .
5153                                 $cgi->a({-href => href(action=>"commitdiff",
5154                                                        hash=>$hash_parent)},
5155                                         esc_html($hash_parent_short)) .
5156                                 ')';
5157                 } elsif (!$co{'parent'}) {
5158                         # --root commitdiff
5159                         $formats_nav .= ' (initial)';
5160                 } elsif (scalar @{$co{'parents'}} == 1) {
5161                         # single parent commit
5162                         $formats_nav .=
5163                                 ' (parent: ' .
5164                                 $cgi->a({-href => href(action=>"commitdiff",
5165                                                        hash=>$co{'parent'})},
5166                                         esc_html(substr($co{'parent'}, 0, 7))) .
5167                                 ')';
5168                 } else {
5169                         # merge commit
5170                         if ($hash_parent eq '--cc') {
5171                                 $formats_nav .= ' | ' .
5172                                         $cgi->a({-href => href(action=>"commitdiff",
5173                                                                hash=>$hash, hash_parent=>'-c')},
5174                                                 'combined');
5175                         } else { # $hash_parent eq '-c'
5176                                 $formats_nav .= ' | ' .
5177                                         $cgi->a({-href => href(action=>"commitdiff",
5178                                                                hash=>$hash, hash_parent=>'--cc')},
5179                                                 'compact');
5180                         }
5181                         $formats_nav .=
5182                                 ' (merge: ' .
5183                                 join(' ', map {
5184                                         $cgi->a({-href => href(action=>"commitdiff",
5185                                                                hash=>$_)},
5186                                                 esc_html(substr($_, 0, 7)));
5187                                 } @{$co{'parents'}} ) .
5188                                 ')';
5189                 }
5190         }
5191
5192         my $hash_parent_param = $hash_parent;
5193         if (!defined $hash_parent_param) {
5194                 # --cc for multiple parents, --root for parentless
5195                 $hash_parent_param =
5196                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5197         }
5198
5199         # read commitdiff
5200         my $fd;
5201         my @difftree;
5202         if ($format eq 'html') {
5203                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5204                         "--no-commit-id", "--patch-with-raw", "--full-index",
5205                         $hash_parent_param, $hash, "--"
5206                         or die_error(500, "Open git-diff-tree failed");
5207
5208                 while (my $line = <$fd>) {
5209                         chomp $line;
5210                         # empty line ends raw part of diff-tree output
5211                         last unless $line;
5212                         push @difftree, scalar parse_difftree_raw_line($line);
5213                 }
5214
5215         } elsif ($format eq 'plain') {
5216                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5217                         '-p', $hash_parent_param, $hash, "--"
5218                         or die_error(500, "Open git-diff-tree failed");
5219
5220         } else {
5221                 die_error(400, "Unknown commitdiff format");
5222         }
5223
5224         # non-textual hash id's can be cached
5225         my $expires;
5226         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5227                 $expires = "+1d";
5228         }
5229
5230         # write commit message
5231         if ($format eq 'html') {
5232                 my $refs = git_get_references();
5233                 my $ref = format_ref_marker($refs, $co{'id'});
5234
5235                 git_header_html(undef, $expires);
5236                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5237                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5238                 git_print_authorship(\%co);
5239                 print "<div class=\"page_body\">\n";
5240                 if (@{$co{'comment'}} > 1) {
5241                         print "<div class=\"log\">\n";
5242                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5243                         print "</div>\n"; # class="log"
5244                 }
5245
5246         } elsif ($format eq 'plain') {
5247                 my $refs = git_get_references("tags");
5248                 my $tagname = git_get_rev_name_tags($hash);
5249                 my $filename = basename($project) . "-$hash.patch";
5250
5251                 print $cgi->header(
5252                         -type => 'text/plain',
5253                         -charset => 'utf-8',
5254                         -expires => $expires,
5255                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5256                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5257                 print "From: " . to_utf8($co{'author'}) . "\n";
5258                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5259                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5260
5261                 print "X-Git-Tag: $tagname\n" if $tagname;
5262                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5263
5264                 foreach my $line (@{$co{'comment'}}) {
5265                         print to_utf8($line) . "\n";
5266                 }
5267                 print "---\n\n";
5268         }
5269
5270         # write patch
5271         if ($format eq 'html') {
5272                 my $use_parents = !defined $hash_parent ||
5273                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5274                 git_difftree_body(\@difftree, $hash,
5275                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5276                 print "<br/>\n";
5277
5278                 git_patchset_body($fd, \@difftree, $hash,
5279                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5280                 close $fd;
5281                 print "</div>\n"; # class="page_body"
5282                 git_footer_html();
5283
5284         } elsif ($format eq 'plain') {
5285                 local $/ = undef;
5286                 print <$fd>;
5287                 close $fd
5288                         or print "Reading git-diff-tree failed\n";
5289         }
5290 }
5291
5292 sub git_commitdiff_plain {
5293         git_commitdiff('plain');
5294 }
5295
5296 sub git_history {
5297         if (!defined $hash_base) {
5298                 $hash_base = git_get_head_hash($project);
5299         }
5300         if (!defined $page) {
5301                 $page = 0;
5302         }
5303         my $ftype;
5304         my %co = parse_commit($hash_base)
5305             or die_error(404, "Unknown commit object");
5306
5307         my $refs = git_get_references();
5308         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5309
5310         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5311                                        $file_name, "--full-history")
5312             or die_error(404, "No such file or directory on given branch");
5313
5314         if (!defined $hash && defined $file_name) {
5315                 # some commits could have deleted file in question,
5316                 # and not have it in tree, but one of them has to have it
5317                 for (my $i = 0; $i <= @commitlist; $i++) {
5318                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5319                         last if defined $hash;
5320                 }
5321         }
5322         if (defined $hash) {
5323                 $ftype = git_get_type($hash);
5324         }
5325         if (!defined $ftype) {
5326                 die_error(500, "Unknown type of object");
5327         }
5328
5329         my $paging_nav = '';
5330         if ($page > 0) {
5331                 $paging_nav .=
5332                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5333                                                file_name=>$file_name)},
5334                                 "first");
5335                 $paging_nav .= " &sdot; " .
5336                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5337                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5338         } else {
5339                 $paging_nav .= "first";
5340                 $paging_nav .= " &sdot; prev";
5341         }
5342         my $next_link = '';
5343         if ($#commitlist >= 100) {
5344                 $next_link =
5345                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5346                                  -accesskey => "n", -title => "Alt-n"}, "next");
5347                 $paging_nav .= " &sdot; $next_link";
5348         } else {
5349                 $paging_nav .= " &sdot; next";
5350         }
5351
5352         git_header_html();
5353         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5354         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5355         git_print_page_path($file_name, $ftype, $hash_base);
5356
5357         git_history_body(\@commitlist, 0, 99,
5358                          $refs, $hash_base, $ftype, $next_link);
5359
5360         git_footer_html();
5361 }
5362
5363 sub git_search {
5364         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5365         if (!defined $searchtext) {
5366                 die_error(400, "Text field is empty");
5367         }
5368         if (!defined $hash) {
5369                 $hash = git_get_head_hash($project);
5370         }
5371         my %co = parse_commit($hash);
5372         if (!%co) {
5373                 die_error(404, "Unknown commit object");
5374         }
5375         if (!defined $page) {
5376                 $page = 0;
5377         }
5378
5379         $searchtype ||= 'commit';
5380         if ($searchtype eq 'pickaxe') {
5381                 # pickaxe may take all resources of your box and run for several minutes
5382                 # with every query - so decide by yourself how public you make this feature
5383                 gitweb_check_feature('pickaxe')
5384                     or die_error(403, "Pickaxe is disabled");
5385         }
5386         if ($searchtype eq 'grep') {
5387                 gitweb_check_feature('grep')
5388                     or die_error(403, "Grep is disabled");
5389         }
5390
5391         git_header_html();
5392
5393         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5394                 my $greptype;
5395                 if ($searchtype eq 'commit') {
5396                         $greptype = "--grep=";
5397                 } elsif ($searchtype eq 'author') {
5398                         $greptype = "--author=";
5399                 } elsif ($searchtype eq 'committer') {
5400                         $greptype = "--committer=";
5401                 }
5402                 $greptype .= $searchtext;
5403                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5404                                                $greptype, '--regexp-ignore-case',
5405                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5406
5407                 my $paging_nav = '';
5408                 if ($page > 0) {
5409                         $paging_nav .=
5410                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5411                                                        searchtext=>$searchtext,
5412                                                        searchtype=>$searchtype)},
5413                                         "first");
5414                         $paging_nav .= " &sdot; " .
5415                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5416                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5417                 } else {
5418                         $paging_nav .= "first";
5419                         $paging_nav .= " &sdot; prev";
5420                 }
5421                 my $next_link = '';
5422                 if ($#commitlist >= 100) {
5423                         $next_link =
5424                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5425                                          -accesskey => "n", -title => "Alt-n"}, "next");
5426                         $paging_nav .= " &sdot; $next_link";
5427                 } else {
5428                         $paging_nav .= " &sdot; next";
5429                 }
5430
5431                 if ($#commitlist >= 100) {
5432                 }
5433
5434                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5435                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5436                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5437         }
5438
5439         if ($searchtype eq 'pickaxe') {
5440                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5441                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5442
5443                 print "<table class=\"pickaxe search\">\n";
5444                 my $alternate = 1;
5445                 $/ = "\n";
5446                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5447                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5448                         ($search_use_regexp ? '--pickaxe-regex' : ());
5449                 undef %co;
5450                 my @files;
5451                 while (my $line = <$fd>) {
5452                         chomp $line;
5453                         next unless $line;
5454
5455                         my %set = parse_difftree_raw_line($line);
5456                         if (defined $set{'commit'}) {
5457                                 # finish previous commit
5458                                 if (%co) {
5459                                         print "</td>\n" .
5460                                               "<td class=\"link\">" .
5461                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5462                                               " | " .
5463                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5464                                         print "</td>\n" .
5465                                               "</tr>\n";
5466                                 }
5467
5468                                 if ($alternate) {
5469                                         print "<tr class=\"dark\">\n";
5470                                 } else {
5471                                         print "<tr class=\"light\">\n";
5472                                 }
5473                                 $alternate ^= 1;
5474                                 %co = parse_commit($set{'commit'});
5475                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5476                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5477                                       "<td><i>$author</i></td>\n" .
5478                                       "<td>" .
5479                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5480                                               -class => "list subject"},
5481                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5482                         } elsif (defined $set{'to_id'}) {
5483                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5484
5485                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5486                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5487                                               -class => "list"},
5488                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5489                                       "<br/>\n";
5490                         }
5491                 }
5492                 close $fd;
5493
5494                 # finish last commit (warning: repetition!)
5495                 if (%co) {
5496                         print "</td>\n" .
5497                               "<td class=\"link\">" .
5498                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5499                               " | " .
5500                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5501                         print "</td>\n" .
5502                               "</tr>\n";
5503                 }
5504
5505                 print "</table>\n";
5506         }
5507
5508         if ($searchtype eq 'grep') {
5509                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5510                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5511
5512                 print "<table class=\"grep_search\">\n";
5513                 my $alternate = 1;
5514                 my $matches = 0;
5515                 $/ = "\n";
5516                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5517                         $search_use_regexp ? ('-E', '-i') : '-F',
5518                         $searchtext, $co{'tree'};
5519                 my $lastfile = '';
5520                 while (my $line = <$fd>) {
5521                         chomp $line;
5522                         my ($file, $lno, $ltext, $binary);
5523                         last if ($matches++ > 1000);
5524                         if ($line =~ /^Binary file (.+) matches$/) {
5525                                 $file = $1;
5526                                 $binary = 1;
5527                         } else {
5528                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5529                         }
5530                         if ($file ne $lastfile) {
5531                                 $lastfile and print "</td></tr>\n";
5532                                 if ($alternate++) {
5533                                         print "<tr class=\"dark\">\n";
5534                                 } else {
5535                                         print "<tr class=\"light\">\n";
5536                                 }
5537                                 print "<td class=\"list\">".
5538                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5539                                                                file_name=>"$file"),
5540                                                 -class => "list"}, esc_path($file));
5541                                 print "</td><td>\n";
5542                                 $lastfile = $file;
5543                         }
5544                         if ($binary) {
5545                                 print "<div class=\"binary\">Binary file</div>\n";
5546                         } else {
5547                                 $ltext = untabify($ltext);
5548                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5549                                         $ltext = esc_html($1, -nbsp=>1);
5550                                         $ltext .= '<span class="match">';
5551                                         $ltext .= esc_html($2, -nbsp=>1);
5552                                         $ltext .= '</span>';
5553                                         $ltext .= esc_html($3, -nbsp=>1);
5554                                 } else {
5555                                         $ltext = esc_html($ltext, -nbsp=>1);
5556                                 }
5557                                 print "<div class=\"pre\">" .
5558                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5559                                                                file_name=>"$file").'#l'.$lno,
5560                                                 -class => "linenr"}, sprintf('%4i', $lno))
5561                                         . ' ' .  $ltext . "</div>\n";
5562                         }
5563                 }
5564                 if ($lastfile) {
5565                         print "</td></tr>\n";
5566                         if ($matches > 1000) {
5567                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5568                         }
5569                 } else {
5570                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5571                 }
5572                 close $fd;
5573
5574                 print "</table>\n";
5575         }
5576         git_footer_html();
5577 }
5578
5579 sub git_search_help {
5580         git_header_html();
5581         git_print_page_nav('','', $hash,$hash,$hash);
5582         print <<EOT;
5583 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5584 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5585 the pattern entered is recognized as the POSIX extended
5586 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5587 insensitive).</p>
5588 <dl>
5589 <dt><b>commit</b></dt>
5590 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5591 EOT
5592         my ($have_grep) = gitweb_check_feature('grep');
5593         if ($have_grep) {
5594                 print <<EOT;
5595 <dt><b>grep</b></dt>
5596 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5597     a different one) are searched for the given pattern. On large trees, this search can take
5598 a while and put some strain on the server, so please use it with some consideration. Note that
5599 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5600 case-sensitive.</dd>
5601 EOT
5602         }
5603         print <<EOT;
5604 <dt><b>author</b></dt>
5605 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5606 <dt><b>committer</b></dt>
5607 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5608 EOT
5609         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5610         if ($have_pickaxe) {
5611                 print <<EOT;
5612 <dt><b>pickaxe</b></dt>
5613 <dd>All commits that caused the string to appear or disappear from any file (changes that
5614 added, removed or "modified" the string) will be listed. This search can take a while and
5615 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5616 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5617 EOT
5618         }
5619         print "</dl>\n";
5620         git_footer_html();
5621 }
5622
5623 sub git_shortlog {
5624         my $head = git_get_head_hash($project);
5625         if (!defined $hash) {
5626                 $hash = $head;
5627         }
5628         if (!defined $page) {
5629                 $page = 0;
5630         }
5631         my $refs = git_get_references();
5632
5633         my $commit_hash = $hash;
5634         if (defined $hash_parent) {
5635                 $commit_hash = "$hash_parent..$hash";
5636         }
5637         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5638
5639         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5640         my $next_link = '';
5641         if ($#commitlist >= 100) {
5642                 $next_link =
5643                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5644                                  -accesskey => "n", -title => "Alt-n"}, "next");
5645         }
5646
5647         git_header_html();
5648         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5649         git_print_header_div('summary', $project);
5650
5651         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5652
5653         git_footer_html();
5654 }
5655
5656 ## ......................................................................
5657 ## feeds (RSS, Atom; OPML)
5658
5659 sub git_feed {
5660         my $format = shift || 'atom';
5661         my ($have_blame) = gitweb_check_feature('blame');
5662
5663         # Atom: http://www.atomenabled.org/developers/syndication/
5664         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5665         if ($format ne 'rss' && $format ne 'atom') {
5666                 die_error(400, "Unknown web feed format");
5667         }
5668
5669         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5670         my $head = $hash || 'HEAD';
5671         my @commitlist = parse_commits($head, 150, 0, $file_name);
5672
5673         my %latest_commit;
5674         my %latest_date;
5675         my $content_type = "application/$format+xml";
5676         if (defined $cgi->http('HTTP_ACCEPT') &&
5677                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5678                 # browser (feed reader) prefers text/xml
5679                 $content_type = 'text/xml';
5680         }
5681         if (defined($commitlist[0])) {
5682                 %latest_commit = %{$commitlist[0]};
5683                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5684                 print $cgi->header(
5685                         -type => $content_type,
5686                         -charset => 'utf-8',
5687                         -last_modified => $latest_date{'rfc2822'});
5688         } else {
5689                 print $cgi->header(
5690                         -type => $content_type,
5691                         -charset => 'utf-8');
5692         }
5693
5694         # Optimization: skip generating the body if client asks only
5695         # for Last-Modified date.
5696         return if ($cgi->request_method() eq 'HEAD');
5697
5698         # header variables
5699         my $title = "$site_name - $project/$action";
5700         my $feed_type = 'log';
5701         if (defined $hash) {
5702                 $title .= " - '$hash'";
5703                 $feed_type = 'branch log';
5704                 if (defined $file_name) {
5705                         $title .= " :: $file_name";
5706                         $feed_type = 'history';
5707                 }
5708         } elsif (defined $file_name) {
5709                 $title .= " - $file_name";
5710                 $feed_type = 'history';
5711         }
5712         $title .= " $feed_type";
5713         my $descr = git_get_project_description($project);
5714         if (defined $descr) {
5715                 $descr = esc_html($descr);
5716         } else {
5717                 $descr = "$project " .
5718                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5719                          " feed";
5720         }
5721         my $owner = git_get_project_owner($project);
5722         $owner = esc_html($owner);
5723
5724         #header
5725         my $alt_url;
5726         if (defined $file_name) {
5727                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5728         } elsif (defined $hash) {
5729                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5730         } else {
5731                 $alt_url = href(-full=>1, action=>"summary");
5732         }
5733         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5734         if ($format eq 'rss') {
5735                 print <<XML;
5736 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5737 <channel>
5738 XML
5739                 print "<title>$title</title>\n" .
5740                       "<link>$alt_url</link>\n" .
5741                       "<description>$descr</description>\n" .
5742                       "<language>en</language>\n";
5743         } elsif ($format eq 'atom') {
5744                 print <<XML;
5745 <feed xmlns="http://www.w3.org/2005/Atom">
5746 XML
5747                 print "<title>$title</title>\n" .
5748                       "<subtitle>$descr</subtitle>\n" .
5749                       '<link rel="alternate" type="text/html" href="' .
5750                       $alt_url . '" />' . "\n" .
5751                       '<link rel="self" type="' . $content_type . '" href="' .
5752                       $cgi->self_url() . '" />' . "\n" .
5753                       "<id>" . href(-full=>1) . "</id>\n" .
5754                       # use project owner for feed author
5755                       "<author><name>$owner</name></author>\n";
5756                 if (defined $favicon) {
5757                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5758                 }
5759                 if (defined $logo_url) {
5760                         # not twice as wide as tall: 72 x 27 pixels
5761                         print "<logo>" . esc_url($logo) . "</logo>\n";
5762                 }
5763                 if (! %latest_date) {
5764                         # dummy date to keep the feed valid until commits trickle in:
5765                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5766                 } else {
5767                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5768                 }
5769         }
5770
5771         # contents
5772         for (my $i = 0; $i <= $#commitlist; $i++) {
5773                 my %co = %{$commitlist[$i]};
5774                 my $commit = $co{'id'};
5775                 # we read 150, we always show 30 and the ones more recent than 48 hours
5776                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5777                         last;
5778                 }
5779                 my %cd = parse_date($co{'author_epoch'});
5780
5781                 # get list of changed files
5782                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5783                         $co{'parent'} || "--root",
5784                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5785                         or next;
5786                 my @difftree = map { chomp; $_ } <$fd>;
5787                 close $fd
5788                         or next;
5789
5790                 # print element (entry, item)
5791                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5792                 if ($format eq 'rss') {
5793                         print "<item>\n" .
5794                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5795                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5796                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5797                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5798                               "<link>$co_url</link>\n" .
5799                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5800                               "<content:encoded>" .
5801                               "<![CDATA[\n";
5802                 } elsif ($format eq 'atom') {
5803                         print "<entry>\n" .
5804                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5805                               "<updated>$cd{'iso-8601'}</updated>\n" .
5806                               "<author>\n" .
5807                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5808                         if ($co{'author_email'}) {
5809                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5810                         }
5811                         print "</author>\n" .
5812                               # use committer for contributor
5813                               "<contributor>\n" .
5814                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5815                         if ($co{'committer_email'}) {
5816                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5817                         }
5818                         print "</contributor>\n" .
5819                               "<published>$cd{'iso-8601'}</published>\n" .
5820                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5821                               "<id>$co_url</id>\n" .
5822                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5823                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5824                 }
5825                 my $comment = $co{'comment'};
5826                 print "<pre>\n";
5827                 foreach my $line (@$comment) {
5828                         $line = esc_html($line);
5829                         print "$line\n";
5830                 }
5831                 print "</pre><ul>\n";
5832                 foreach my $difftree_line (@difftree) {
5833                         my %difftree = parse_difftree_raw_line($difftree_line);
5834                         next if !$difftree{'from_id'};
5835
5836                         my $file = $difftree{'file'} || $difftree{'to_file'};
5837
5838                         print "<li>" .
5839                               "[" .
5840                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5841                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5842                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5843                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5844                                       -title => "diff"}, 'D');
5845                         if ($have_blame) {
5846                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5847                                                              file_name=>$file, hash_base=>$commit),
5848                                               -title => "blame"}, 'B');
5849                         }
5850                         # if this is not a feed of a file history
5851                         if (!defined $file_name || $file_name ne $file) {
5852                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5853                                                              file_name=>$file, hash=>$commit),
5854                                               -title => "history"}, 'H');
5855                         }
5856                         $file = esc_path($file);
5857                         print "] ".
5858                               "$file</li>\n";
5859                 }
5860                 if ($format eq 'rss') {
5861                         print "</ul>]]>\n" .
5862                               "</content:encoded>\n" .
5863                               "</item>\n";
5864                 } elsif ($format eq 'atom') {
5865                         print "</ul>\n</div>\n" .
5866                               "</content>\n" .
5867                               "</entry>\n";
5868                 }
5869         }
5870
5871         # end of feed
5872         if ($format eq 'rss') {
5873                 print "</channel>\n</rss>\n";
5874         }       elsif ($format eq 'atom') {
5875                 print "</feed>\n";
5876         }
5877 }
5878
5879 sub git_rss {
5880         git_feed('rss');
5881 }
5882
5883 sub git_atom {
5884         git_feed('atom');
5885 }
5886
5887 sub git_opml {
5888         my @list = git_get_projects_list();
5889
5890         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5891         print <<XML;
5892 <?xml version="1.0" encoding="utf-8"?>
5893 <opml version="1.0">
5894 <head>
5895   <title>$site_name OPML Export</title>
5896 </head>
5897 <body>
5898 <outline text="git RSS feeds">
5899 XML
5900
5901         foreach my $pr (@list) {
5902                 my %proj = %$pr;
5903                 my $head = git_get_head_hash($proj{'path'});
5904                 if (!defined $head) {
5905                         next;
5906                 }
5907                 $git_dir = "$projectroot/$proj{'path'}";
5908                 my %co = parse_commit($head);
5909                 if (!%co) {
5910                         next;
5911                 }
5912
5913                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
5914                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
5915                 my $html = "$my_url?p=$proj{'path'};a=summary";
5916                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
5917         }
5918         print <<XML;
5919 </outline>
5920 </body>
5921 </opml>
5922 XML
5923 }