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 # we make $path_info global because it's also used later on
  33 my $path_info = $ENV{"PATH_INFO"};
  34 if ($path_info) {
  35         $my_url =~ s,\Q$path_info\E$,,;
  36         $my_uri =~ s,\Q$path_info\E$,,;
  37 }
  38
  39 # core git executable to use
  40 # this can just be "git" if your webserver has a sensible PATH
  41 our $GIT = "++GIT_BINDIR++/git";
  42
  43 # absolute fs-path which will be prepended to the project path
  44 #our $projectroot = "/pub/scm";
  45 our $projectroot = "++GITWEB_PROJECTROOT++";
  46
  47 # fs traversing limit for getting project list
  48 # the number is relative to the projectroot
  49 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  50
  51 # target of the home link on top of all pages
  52 our $home_link = $my_uri || "/";
  53
  54 # string of the home link on top of all pages
  55 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  56
  57 # name of your site or organization to appear in page titles
  58 # replace this with something more descriptive for clearer bookmarks
  59 our $site_name = "++GITWEB_SITENAME++"
  60                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  61
  62 # filename of html text to include at top of each page
  63 our $site_header = "++GITWEB_SITE_HEADER++";
  64 # html text to include at home page
  65 our $home_text = "++GITWEB_HOMETEXT++";
  66 # filename of html text to include at bottom of each page
  67 our $site_footer = "++GITWEB_SITE_FOOTER++";
  68
  69 # URI of stylesheets
  70 our @stylesheets = ("++GITWEB_CSS++");
  71 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  72 our $stylesheet = undef;
  73 # URI of GIT logo (72x27 size)
  74 our $logo = "++GITWEB_LOGO++";
  75 # URI of GIT favicon, assumed to be image/png type
  76 our $favicon = "++GITWEB_FAVICON++";
  77
  78 # URI and label (title) of GIT logo link
  79 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  80 #our $logo_label = "git documentation";
  81 our $logo_url = "http://git.or.cz/";
  82 our $logo_label = "git homepage";
  83
  84 # source of projects list
  85 our $projects_list = "++GITWEB_LIST++";
  86
  87 # the width (in characters) of the projects list "Description" column
  88 our $projects_list_description_width = 25;
  89
  90 # default order of projects list
  91 # valid values are none, project, descr, owner, and age
  92 our $default_projects_order = "project";
  93
  94 # show repository only if this file exists
  95 # (only effective if this variable evaluates to true)
  96 our $export_ok = "++GITWEB_EXPORT_OK++";
  97
  98 # only allow viewing of repositories also shown on the overview page
  99 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 100
 101 # list of git base URLs used for URL to where fetch project from,
 102 # i.e. full URL is "$git_base_url/$project"
 103 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 104
 105 # default blob_plain mimetype and default charset for text/plain blob
 106 our $default_blob_plain_mimetype = 'text/plain';
 107 our $default_text_plain_charset  = undef;
 108
 109 # file to use for guessing MIME types before trying /etc/mime.types
 110 # (relative to the current git repository)
 111 our $mimetypes_file = undef;
 112
 113 # assume this charset if line contains non-UTF-8 characters;
 114 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 115 # for which encoding all byte sequences are valid, for example
 116 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 117 # could be even 'utf-8' for the old behavior)
 118 our $fallback_encoding = 'latin1';
 119
 120 # rename detection options for git-diff and git-diff-tree
 121 # - default is '-M', with the cost proportional to
 122 #   (number of removed files) * (number of new files).
 123 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 124 #   (number of changed files + number of removed files) * (number of new files)
 125 # - even more costly is '-C', '--find-copies-harder' with cost
 126 #   (number of files in the original tree) * (number of new files)
 127 # - one might want to include '-B' option, e.g. '-B', '-M'
 128 our @diff_opts = ('-M'); # taken from git_commit
 129
 130 # information about snapshot formats that gitweb is capable of serving
 131 our %known_snapshot_formats = (
 132         # name => {
 133         #       'display' => display name,
 134         #       'type' => mime type,
 135         #       'suffix' => filename suffix,
 136         #       'format' => --format for git-archive,
 137         #       'compressor' => [compressor command and arguments]
 138         #                       (array reference, optional)}
 139         #
 140         'tgz' => {
 141                 'display' => 'tar.gz',
 142                 'type' => 'application/x-gzip',
 143                 'suffix' => '.tar.gz',
 144                 'format' => 'tar',
 145                 'compressor' => ['gzip']},
 146
 147         'tbz2' => {
 148                 'display' => 'tar.bz2',
 149                 'type' => 'application/x-bzip2',
 150                 'suffix' => '.tar.bz2',
 151                 'format' => 'tar',
 152                 'compressor' => ['bzip2']},
 153
 154         'zip' => {
 155                 'display' => 'zip',
 156                 'type' => 'application/x-zip',
 157                 'suffix' => '.zip',
 158                 'format' => 'zip'},
 159 );
 160
 161 # Aliases so we understand old gitweb.snapshot values in repository
 162 # configuration.
 163 our %known_snapshot_format_aliases = (
 164         'gzip'  => 'tgz',
 165         'bzip2' => 'tbz2',
 166
 167         # backward compatibility: legacy gitweb config support
 168         'x-gzip' => undef, 'gz' => undef,
 169         'x-bzip2' => undef, 'bz2' => undef,
 170         'x-zip' => undef, '' => undef,
 171 );
 172
 173 # You define site-wide feature defaults here; override them with
 174 # $GITWEB_CONFIG as necessary.
 175 our %feature = (
 176         # feature => {
 177         #       'sub' => feature-sub (subroutine),
 178         #       'override' => allow-override (boolean),
 179         #       'default' => [ default options...] (array reference)}
 180         #
 181         # if feature is overridable (it means that allow-override has true value),
 182         # then feature-sub will be called with default options as parameters;
 183         # return value of feature-sub indicates if to enable specified feature
 184         #
 185         # if there is no 'sub' key (no feature-sub), then feature cannot be
 186         # overriden
 187         #
 188         # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 189
 190         # Enable the 'blame' blob view, showing the last commit that modified
 191         # each line in the file. This can be very CPU-intensive.
 192
 193         # To enable system wide have in $GITWEB_CONFIG
 194         # $feature{'blame'}{'default'} = [1];
 195         # To have project specific config enable override in $GITWEB_CONFIG
 196         # $feature{'blame'}{'override'} = 1;
 197         # and in project config gitweb.blame = 0|1;
 198         'blame' => {
 199                 'sub' => \&feature_blame,
 200                 'override' => 0,
 201                 'default' => [0]},
 202
 203         # Enable the 'snapshot' link, providing a compressed archive of any
 204         # tree. This can potentially generate high traffic if you have large
 205         # project.
 206
 207         # Value is a list of formats defined in %known_snapshot_formats that
 208         # you wish to offer.
 209         # To disable system wide have in $GITWEB_CONFIG
 210         # $feature{'snapshot'}{'default'} = [];
 211         # To have project specific config enable override in $GITWEB_CONFIG
 212         # $feature{'snapshot'}{'override'} = 1;
 213         # and in project config, a comma-separated list of formats or "none"
 214         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 215         'snapshot' => {
 216                 'sub' => \&feature_snapshot,
 217                 'override' => 0,
 218                 'default' => ['tgz']},
 219
 220         # Enable text search, which will list the commits which match author,
 221         # committer or commit text to a given string.  Enabled by default.
 222         # Project specific override is not supported.
 223         'search' => {
 224                 'override' => 0,
 225                 'default' => [1]},
 226
 227         # Enable grep search, which will list the files in currently selected
 228         # tree containing the given string. Enabled by default. This can be
 229         # potentially CPU-intensive, of course.
 230
 231         # To enable system wide have in $GITWEB_CONFIG
 232         # $feature{'grep'}{'default'} = [1];
 233         # To have project specific config enable override in $GITWEB_CONFIG
 234         # $feature{'grep'}{'override'} = 1;
 235         # and in project config gitweb.grep = 0|1;
 236         'grep' => {
 237                 'override' => 0,
 238                 'default' => [1]},
 239
 240         # Enable the pickaxe search, which will list the commits that modified
 241         # a given string in a file. This can be practical and quite faster
 242         # alternative to 'blame', but still potentially CPU-intensive.
 243
 244         # To enable system wide have in $GITWEB_CONFIG
 245         # $feature{'pickaxe'}{'default'} = [1];
 246         # To have project specific config enable override in $GITWEB_CONFIG
 247         # $feature{'pickaxe'}{'override'} = 1;
 248         # and in project config gitweb.pickaxe = 0|1;
 249         'pickaxe' => {
 250                 'sub' => \&feature_pickaxe,
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Make gitweb use an alternative format of the URLs which can be
 255         # more readable and natural-looking: project name is embedded
 256         # directly in the path and the query string contains other
 257         # auxiliary information. All gitweb installations recognize
 258         # URL in either format; this configures in which formats gitweb
 259         # generates links.
 260
 261         # To enable system wide have in $GITWEB_CONFIG
 262         # $feature{'pathinfo'}{'default'} = [1];
 263         # Project specific override is not supported.
 264
 265         # Note that you will need to change the default location of CSS,
 266         # favicon, logo and possibly other files to an absolute URL. Also,
 267         # if gitweb.cgi serves as your indexfile, you will need to force
 268         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 269         'pathinfo' => {
 270                 'override' => 0,
 271                 'default' => [0]},
 272
 273         # Make gitweb consider projects in project root subdirectories
 274         # to be forks of existing projects. Given project $projname.git,
 275         # projects matching $projname/*.git will not be shown in the main
 276         # projects list, instead a '+' mark will be added to $projname
 277         # there and a 'forks' view will be enabled for the project, listing
 278         # all the forks. If project list is taken from a file, forks have
 279         # to be listed after the main project.
 280
 281         # To enable system wide have in $GITWEB_CONFIG
 282         # $feature{'forks'}{'default'} = [1];
 283         # Project specific override is not supported.
 284         'forks' => {
 285                 'override' => 0,
 286                 'default' => [0]},
 287
 288         # Insert custom links to the action bar of all project pages.
 289         # This enables you mainly to link to third-party scripts integrating
 290         # into gitweb; e.g. git-browser for graphical history representation
 291         # or custom web-based repository administration interface.
 292
 293         # The 'default' value consists of a list of triplets in the form
 294         # (label, link, position) where position is the label after which
 295         # to inster the link and link is a format string where %n expands
 296         # to the project name, %f to the project path within the filesystem,
 297         # %h to the current hash (h gitweb parameter) and %b to the current
 298         # hash base (hb gitweb parameter).
 299
 300         # To enable system wide have in $GITWEB_CONFIG e.g.
 301         # $feature{'actions'}{'default'} = [('graphiclog',
 302         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 303         # Project specific override is not supported.
 304         'actions' => {
 305                 'override' => 0,
 306                 'default' => []},
 307
 308         # Allow gitweb scan project content tags described in ctags/
 309         # of project repository, and display the popular Web 2.0-ish
 310         # "tag cloud" near the project list. Note that this is something
 311         # COMPLETELY different from the normal Git tags.
 312
 313         # gitweb by itself can show existing tags, but it does not handle
 314         # tagging itself; you need an external application for that.
 315         # For an example script, check Girocco's cgi/tagproj.cgi.
 316         # You may want to install the HTML::TagCloud Perl module to get
 317         # a pretty tag cloud instead of just a list of tags.
 318
 319         # To enable system wide have in $GITWEB_CONFIG
 320         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 321         # Project specific override is not supported.
 322         'ctags' => {
 323                 'override' => 0,
 324                 'default' => [0]},
 325 );
 326
 327 sub gitweb_check_feature {
 328         my ($name) = @_;
 329         return unless exists $feature{$name};
 330         my ($sub, $override, @defaults) = (
 331                 $feature{$name}{'sub'},
 332                 $feature{$name}{'override'},
 333                 @{$feature{$name}{'default'}});
 334         if (!$override) { return @defaults; }
 335         if (!defined $sub) {
 336                 warn "feature $name is not overrideable";
 337                 return @defaults;
 338         }
 339         return $sub->(@defaults);
 340 }
 341
 342 sub feature_blame {
 343         my ($val) = git_get_project_config('blame', '--bool');
 344
 345         if ($val eq 'true') {
 346                 return 1;
 347         } elsif ($val eq 'false') {
 348                 return 0;
 349         }
 350
 351         return $_[0];
 352 }
 353
 354 sub feature_snapshot {
 355         my (@fmts) = @_;
 356
 357         my ($val) = git_get_project_config('snapshot');
 358
 359         if ($val) {
 360                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 361         }
 362
 363         return @fmts;
 364 }
 365
 366 sub feature_grep {
 367         my ($val) = git_get_project_config('grep', '--bool');
 368
 369         if ($val eq 'true') {
 370                 return (1);
 371         } elsif ($val eq 'false') {
 372                 return (0);
 373         }
 374
 375         return ($_[0]);
 376 }
 377
 378 sub feature_pickaxe {
 379         my ($val) = git_get_project_config('pickaxe', '--bool');
 380
 381         if ($val eq 'true') {
 382                 return (1);
 383         } elsif ($val eq 'false') {
 384                 return (0);
 385         }
 386
 387         return ($_[0]);
 388 }
 389
 390 # checking HEAD file with -e is fragile if the repository was
 391 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 392 # and then pruned.
 393 sub check_head_link {
 394         my ($dir) = @_;
 395         my $headfile = "$dir/HEAD";
 396         return ((-e $headfile) ||
 397                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 398 }
 399
 400 sub check_export_ok {
 401         my ($dir) = @_;
 402         return (check_head_link($dir) &&
 403                 (!$export_ok || -e "$dir/$export_ok"));
 404 }
 405
 406 # process alternate names for backward compatibility
 407 # filter out unsupported (unknown) snapshot formats
 408 sub filter_snapshot_fmts {
 409         my @fmts = @_;
 410
 411         @fmts = map {
 412                 exists $known_snapshot_format_aliases{$_} ?
 413                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 414         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 415
 416 }
 417
 418 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 419 if (-e $GITWEB_CONFIG) {
 420         do $GITWEB_CONFIG;
 421 } else {
 422         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 423         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 424 }
 425
 426 # version of the core git binary
 427 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 428
 429 $projects_list ||= $projectroot;
 430
 431 # ======================================================================
 432 # input validation and dispatch
 433
 434 # input parameters can be collected from a variety of sources (presently, CGI
 435 # and PATH_INFO), so we define an %input_params hash that collects them all
 436 # together during validation: this allows subsequent uses (e.g. href()) to be
 437 # agnostic of the parameter origin
 438
 439 my %input_params = ();
 440
 441 # input parameters are stored with the long parameter name as key. This will
 442 # also be used in the href subroutine to convert parameters to their CGI
 443 # equivalent, and since the href() usage is the most frequent one, we store
 444 # the name -> CGI key mapping here, instead of the reverse.
 445 #
 446 # XXX: Warning: If you touch this, check the search form for updating,
 447 # too.
 448
 449 my @cgi_param_mapping = (
 450         project => "p",
 451         action => "a",
 452         file_name => "f",
 453         file_parent => "fp",
 454         hash => "h",
 455         hash_parent => "hp",
 456         hash_base => "hb",
 457         hash_parent_base => "hpb",
 458         page => "pg",
 459         order => "o",
 460         searchtext => "s",
 461         searchtype => "st",
 462         snapshot_format => "sf",
 463         extra_options => "opt",
 464         search_use_regexp => "sr",
 465 );
 466 my %cgi_param_mapping = @cgi_param_mapping;
 467
 468 # we will also need to know the possible actions, for validation
 469 my %actions = (
 470         "blame" => \&git_blame,
 471         "blobdiff" => \&git_blobdiff,
 472         "blobdiff_plain" => \&git_blobdiff_plain,
 473         "blob" => \&git_blob,
 474         "blob_plain" => \&git_blob_plain,
 475         "commitdiff" => \&git_commitdiff,
 476         "commitdiff_plain" => \&git_commitdiff_plain,
 477         "commit" => \&git_commit,
 478         "forks" => \&git_forks,
 479         "heads" => \&git_heads,
 480         "history" => \&git_history,
 481         "log" => \&git_log,
 482         "rss" => \&git_rss,
 483         "atom" => \&git_atom,
 484         "search" => \&git_search,
 485         "search_help" => \&git_search_help,
 486         "shortlog" => \&git_shortlog,
 487         "summary" => \&git_summary,
 488         "tag" => \&git_tag,
 489         "tags" => \&git_tags,
 490         "tree" => \&git_tree,
 491         "snapshot" => \&git_snapshot,
 492         "object" => \&git_object,
 493         # those below don't need $project
 494         "opml" => \&git_opml,
 495         "project_list" => \&git_project_list,
 496         "project_index" => \&git_project_index,
 497 );
 498
 499 # finally, we have the hash of allowed extra_options for the commands that
 500 # allow them
 501 my %allowed_options = (
 502         "--no-merges" => [ qw(rss atom log shortlog history) ],
 503 );
 504
 505 # fill %input_params with the CGI parameters. All values except for 'opt'
 506 # should be single values, but opt can be an array. We should probably
 507 # build an array of parameters that can be multi-valued, but since for the time
 508 # being it's only this one, we just single it out
 509 while (my ($name, $symbol) = each %cgi_param_mapping) {
 510         if ($symbol eq 'opt') {
 511                 $input_params{$name} = [ $cgi->param($symbol) ];
 512         } else {
 513                 $input_params{$name} = $cgi->param($symbol);
 514         }
 515 }
 516
 517 # now read PATH_INFO and update the parameter list for missing parameters
 518 sub evaluate_path_info {
 519         return if defined $input_params{'project'};
 520         return if !$path_info;
 521         $path_info =~ s,^/+,,;
 522         return if !$path_info;
 523
 524         # find which part of PATH_INFO is project
 525         my $project = $path_info;
 526         $project =~ s,/+$,,;
 527         while ($project && !check_head_link("$projectroot/$project")) {
 528                 $project =~ s,/*[^/]*$,,;
 529         }
 530         return unless $project;
 531         $input_params{'project'} = $project;
 532
 533         # do not change any parameters if an action is given using the query string
 534         return if $input_params{'action'};
 535         $path_info =~ s,^\Q$project\E/*,,;
 536
 537         # next, check if we have an action
 538         my $action = $path_info;
 539         $action =~ s,/.*$,,;
 540         if (exists $actions{$action}) {
 541                 $path_info =~ s,^$action/*,,;
 542                 $input_params{'action'} = $action;
 543         }
 544
 545         # list of actions that want hash_base instead of hash, but can have no
 546         # pathname (f) parameter
 547         my @wants_base = (
 548                 'tree',
 549                 'history',
 550         );
 551
 552         my ($refname, $pathname) = split(/:/, $path_info, 2);
 553         if (defined $pathname) {
 554                 # we got "branch:filename" or "branch:dir/"
 555                 # we could use git_get_type(branch:pathname), but:
 556                 # - it needs $git_dir
 557                 # - it does a git() call
 558                 # - the convention of terminating directories with a slash
 559                 #   makes it superfluous
 560                 # - embedding the action in the PATH_INFO would make it even
 561                 #   more superfluous
 562                 $pathname =~ s,^/+,,;
 563                 if (!$pathname || substr($pathname, -1) eq "/") {
 564                         $input_params{'action'} ||= "tree";
 565                         $pathname =~ s,/$,,;
 566                 } else {
 567                         $input_params{'action'} ||= "blob_plain";
 568                 }
 569                 $input_params{'hash_base'} ||= $refname;
 570                 $input_params{'file_name'} ||= $pathname;
 571         } elsif (defined $refname) {
 572                 # we got "branch". In this case we have to choose if we have to
 573                 # set hash or hash_base.
 574                 #
 575                 # Most of the actions without a pathname only want hash to be
 576                 # set, except for the ones specified in @wants_base that want
 577                 # hash_base instead. It should also be noted that hand-crafted
 578                 # links having 'history' as an action and no pathname or hash
 579                 # set will fail, but that happens regardless of PATH_INFO.
 580                 $input_params{'action'} ||= "shortlog";
 581                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 582                         $input_params{'hash_base'} ||= $refname;
 583                 } else {
 584                         $input_params{'hash'} ||= $refname;
 585                 }
 586         }
 587 }
 588 evaluate_path_info();
 589
 590 our $action = $input_params{'action'};
 591 if (defined $action) {
 592         if (!validate_action($action)) {
 593                 die_error(400, "Invalid action parameter");
 594         }
 595 }
 596
 597 # parameters which are pathnames
 598 our $project = $input_params{'project'};
 599 if (defined $project) {
 600         if (!validate_project($project)) {
 601                 undef $project;
 602                 die_error(404, "No such project");
 603         }
 604 }
 605
 606 our $file_name = $input_params{'file_name'};
 607 if (defined $file_name) {
 608         if (!validate_pathname($file_name)) {
 609                 die_error(400, "Invalid file parameter");
 610         }
 611 }
 612
 613 our $file_parent = $input_params{'file_parent'};
 614 if (defined $file_parent) {
 615         if (!validate_pathname($file_parent)) {
 616                 die_error(400, "Invalid file parent parameter");
 617         }
 618 }
 619
 620 # parameters which are refnames
 621 our $hash = $input_params{'hash'};
 622 if (defined $hash) {
 623         if (!validate_refname($hash)) {
 624                 die_error(400, "Invalid hash parameter");
 625         }
 626 }
 627
 628 our $hash_parent = $input_params{'hash_parent'};
 629 if (defined $hash_parent) {
 630         if (!validate_refname($hash_parent)) {
 631                 die_error(400, "Invalid hash parent parameter");
 632         }
 633 }
 634
 635 our $hash_base = $input_params{'hash_base'};
 636 if (defined $hash_base) {
 637         if (!validate_refname($hash_base)) {
 638                 die_error(400, "Invalid hash base parameter");
 639         }
 640 }
 641
 642 our @extra_options = @{$input_params{'extra_options'}};
 643 # @extra_options is always defined, since it can only be (currently) set from
 644 # CGI, and $cgi->param() returns the empty array in array context if the param
 645 # is not set
 646 foreach my $opt (@extra_options) {
 647         if (not exists $allowed_options{$opt}) {
 648                 die_error(400, "Invalid option parameter");
 649         }
 650         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 651                 die_error(400, "Invalid option parameter for this action");
 652         }
 653 }
 654
 655 our $hash_parent_base = $input_params{'hash_parent_base'};
 656 if (defined $hash_parent_base) {
 657         if (!validate_refname($hash_parent_base)) {
 658                 die_error(400, "Invalid hash parent base parameter");
 659         }
 660 }
 661
 662 # other parameters
 663 our $page = $input_params{'page'};
 664 if (defined $page) {
 665         if ($page =~ m/[^0-9]/) {
 666                 die_error(400, "Invalid page parameter");
 667         }
 668 }
 669
 670 our $searchtype = $input_params{'searchtype'};
 671 if (defined $searchtype) {
 672         if ($searchtype =~ m/[^a-z]/) {
 673                 die_error(400, "Invalid searchtype parameter");
 674         }
 675 }
 676
 677 our $search_use_regexp = $input_params{'search_use_regexp'};
 678
 679 our $searchtext = $input_params{'searchtext'};
 680 our $search_regexp;
 681 if (defined $searchtext) {
 682         if (length($searchtext) < 2) {
 683                 die_error(403, "At least two characters are required for search parameter");
 684         }
 685         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 686 }
 687
 688 # path to the current git repository
 689 our $git_dir;
 690 $git_dir = "$projectroot/$project" if $project;
 691
 692 # dispatch
 693 if (!defined $action) {
 694         if (defined $hash) {
 695                 $action = git_get_type($hash);
 696         } elsif (defined $hash_base && defined $file_name) {
 697                 $action = git_get_type("$hash_base:$file_name");
 698         } elsif (defined $project) {
 699                 $action = 'summary';
 700         } else {
 701                 $action = 'project_list';
 702         }
 703 }
 704 if (!defined($actions{$action})) {
 705         die_error(400, "Unknown action");
 706 }
 707 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 708     !$project) {
 709         die_error(400, "Project needed");
 710 }
 711 $actions{$action}->();
 712 exit;
 713
 714 ## ======================================================================
 715 ## action links
 716
 717 sub href (%) {
 718         my %params = @_;
 719         # default is to use -absolute url() i.e. $my_uri
 720         my $href = $params{-full} ? $my_url : $my_uri;
 721
 722         $params{'project'} = $project unless exists $params{'project'};
 723
 724         if ($params{-replay}) {
 725                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 726                         if (!exists $params{$name}) {
 727                                 $params{$name} = $input_params{$name};
 728                         }
 729                 }
 730         }
 731
 732         my ($use_pathinfo) = gitweb_check_feature('pathinfo');
 733         if ($use_pathinfo) {
 734                 # use PATH_INFO for project name
 735                 $href .= "/".esc_url($params{'project'}) if defined $params{'project'};
 736                 delete $params{'project'};
 737
 738                 # Summary just uses the project path URL
 739                 if (defined $params{'action'} && $params{'action'} eq 'summary') {
 740                         delete $params{'action'};
 741                 }
 742         }
 743
 744         # now encode the parameters explicitly
 745         my @result = ();
 746         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 747                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 748                 if (defined $params{$name}) {
 749                         if (ref($params{$name}) eq "ARRAY") {
 750                                 foreach my $par (@{$params{$name}}) {
 751                                         push @result, $symbol . "=" . esc_param($par);
 752                                 }
 753                         } else {
 754                                 push @result, $symbol . "=" . esc_param($params{$name});
 755                         }
 756                 }
 757         }
 758         $href .= "?" . join(';', @result) if scalar @result;
 759
 760         return $href;
 761 }
 762
 763
 764 ## ======================================================================
 765 ## validation, quoting/unquoting and escaping
 766
 767 sub validate_action {
 768         my $input = shift || return undef;
 769         return undef unless exists $actions{$input};
 770         return $input;
 771 }
 772
 773 sub validate_project {
 774         my $input = shift || return undef;
 775         if (!validate_pathname($input) ||
 776                 !(-d "$projectroot/$input") ||
 777                 !check_head_link("$projectroot/$input") ||
 778                 ($export_ok && !(-e "$projectroot/$input/$export_ok")) ||
 779                 ($strict_export && !project_in_list($input))) {
 780                 return undef;
 781         } else {
 782                 return $input;
 783         }
 784 }
 785
 786 sub validate_pathname {
 787         my $input = shift || return undef;
 788
 789         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 790         # at the beginning, at the end, and between slashes.
 791         # also this catches doubled slashes
 792         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 793                 return undef;
 794         }
 795         # no null characters
 796         if ($input =~ m!\0!) {
 797                 return undef;
 798         }
 799         return $input;
 800 }
 801
 802 sub validate_refname {
 803         my $input = shift || return undef;
 804
 805         # textual hashes are O.K.
 806         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 807                 return $input;
 808         }
 809         # it must be correct pathname
 810         $input = validate_pathname($input)
 811                 or return undef;
 812         # restrictions on ref name according to git-check-ref-format
 813         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 814                 return undef;
 815         }
 816         return $input;
 817 }
 818
 819 # decode sequences of octets in utf8 into Perl's internal form,
 820 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 821 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 822 sub to_utf8 {
 823         my $str = shift;
 824         if (utf8::valid($str)) {
 825                 utf8::decode($str);
 826                 return $str;
 827         } else {
 828                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 829         }
 830 }
 831
 832 # quote unsafe chars, but keep the slash, even when it's not
 833 # correct, but quoted slashes look too horrible in bookmarks
 834 sub esc_param {
 835         my $str = shift;
 836         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
 837         $str =~ s/\+/%2B/g;
 838         $str =~ s/ /\+/g;
 839         return $str;
 840 }
 841
 842 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
 843 sub esc_url {
 844         my $str = shift;
 845         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
 846         $str =~ s/\+/%2B/g;
 847         $str =~ s/ /\+/g;
 848         return $str;
 849 }
 850
 851 # replace invalid utf8 character with SUBSTITUTION sequence
 852 sub esc_html ($;%) {
 853         my $str = shift;
 854         my %opts = @_;
 855
 856         $str = to_utf8($str);
 857         $str = $cgi->escapeHTML($str);
 858         if ($opts{'-nbsp'}) {
 859                 $str =~ s/ /&nbsp;/g;
 860         }
 861         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
 862         return $str;
 863 }
 864
 865 # quote control characters and escape filename to HTML
 866 sub esc_path {
 867         my $str = shift;
 868         my %opts = @_;
 869
 870         $str = to_utf8($str);
 871         $str = $cgi->escapeHTML($str);
 872         if ($opts{'-nbsp'}) {
 873                 $str =~ s/ /&nbsp;/g;
 874         }
 875         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
 876         return $str;
 877 }
 878
 879 # Make control characters "printable", using character escape codes (CEC)
 880 sub quot_cec {
 881         my $cntrl = shift;
 882         my %opts = @_;
 883         my %es = ( # character escape codes, aka escape sequences
 884                 "\t" => '\t',   # tab            (HT)
 885                 "\n" => '\n',   # line feed      (LF)
 886                 "\r" => '\r',   # carrige return (CR)
 887                 "\f" => '\f',   # form feed      (FF)
 888                 "\b" => '\b',   # backspace      (BS)
 889                 "\a" => '\a',   # alarm (bell)   (BEL)
 890                 "\e" => '\e',   # escape         (ESC)
 891                 "\013" => '\v', # vertical tab   (VT)
 892                 "\000" => '\0', # nul character  (NUL)
 893         );
 894         my $chr = ( (exists $es{$cntrl})
 895                     ? $es{$cntrl}
 896                     : sprintf('\%2x', ord($cntrl)) );
 897         if ($opts{-nohtml}) {
 898                 return $chr;
 899         } else {
 900                 return "<span class=\"cntrl\">$chr</span>";
 901         }
 902 }
 903
 904 # Alternatively use unicode control pictures codepoints,
 905 # Unicode "printable representation" (PR)
 906 sub quot_upr {
 907         my $cntrl = shift;
 908         my %opts = @_;
 909
 910         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
 911         if ($opts{-nohtml}) {
 912                 return $chr;
 913         } else {
 914                 return "<span class=\"cntrl\">$chr</span>";
 915         }
 916 }
 917
 918 # git may return quoted and escaped filenames
 919 sub unquote {
 920         my $str = shift;
 921
 922         sub unq {
 923                 my $seq = shift;
 924                 my %es = ( # character escape codes, aka escape sequences
 925                         't' => "\t",   # tab            (HT, TAB)
 926                         'n' => "\n",   # newline        (NL)
 927                         'r' => "\r",   # return         (CR)
 928                         'f' => "\f",   # form feed      (FF)
 929                         'b' => "\b",   # backspace      (BS)
 930                         'a' => "\a",   # alarm (bell)   (BEL)
 931                         'e' => "\e",   # escape         (ESC)
 932                         'v' => "\013", # vertical tab   (VT)
 933                 );
 934
 935                 if ($seq =~ m/^[0-7]{1,3}$/) {
 936                         # octal char sequence
 937                         return chr(oct($seq));
 938                 } elsif (exists $es{$seq}) {
 939                         # C escape sequence, aka character escape code
 940                         return $es{$seq};
 941                 }
 942                 # quoted ordinary character
 943                 return $seq;
 944         }
 945
 946         if ($str =~ m/^"(.*)"$/) {
 947                 # needs unquoting
 948                 $str = $1;
 949                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
 950         }
 951         return $str;
 952 }
 953
 954 # escape tabs (convert tabs to spaces)
 955 sub untabify {
 956         my $line = shift;
 957
 958         while ((my $pos = index($line, "\t")) != -1) {
 959                 if (my $count = (8 - ($pos % 8))) {
 960                         my $spaces = ' ' x $count;
 961                         $line =~ s/\t/$spaces/;
 962                 }
 963         }
 964
 965         return $line;
 966 }
 967
 968 sub project_in_list {
 969         my $project = shift;
 970         my @list = git_get_projects_list();
 971         return @list && scalar(grep { $_->{'path'} eq $project } @list);
 972 }
 973
 974 ## ----------------------------------------------------------------------
 975 ## HTML aware string manipulation
 976
 977 # Try to chop given string on a word boundary between position
 978 # $len and $len+$add_len. If there is no word boundary there,
 979 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
 980 # (marking chopped part) would be longer than given string.
 981 sub chop_str {
 982         my $str = shift;
 983         my $len = shift;
 984         my $add_len = shift || 10;
 985         my $where = shift || 'right'; # 'left' | 'center' | 'right'
 986
 987         # Make sure perl knows it is utf8 encoded so we don't
 988         # cut in the middle of a utf8 multibyte char.
 989         $str = to_utf8($str);
 990
 991         # allow only $len chars, but don't cut a word if it would fit in $add_len
 992         # if it doesn't fit, cut it if it's still longer than the dots we would add
 993         # remove chopped character entities entirely
 994
 995         # when chopping in the middle, distribute $len into left and right part
 996         # return early if chopping wouldn't make string shorter
 997         if ($where eq 'center') {
 998                 return $str if ($len + 5 >= length($str)); # filler is length 5
 999                 $len = int($len/2);
1000         } else {
1001                 return $str if ($len + 4 >= length($str)); # filler is length 4
1002         }
1003
1004         # regexps: ending and beginning with word part up to $add_len
1005         my $endre = qr/.{$len}\w{0,$add_len}/;
1006         my $begre = qr/\w{0,$add_len}.{$len}/;
1007
1008         if ($where eq 'left') {
1009                 $str =~ m/^(.*?)($begre)$/;
1010                 my ($lead, $body) = ($1, $2);
1011                 if (length($lead) > 4) {
1012                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1013                         $lead = " ...";
1014                 }
1015                 return "$lead$body";
1016
1017         } elsif ($where eq 'center') {
1018                 $str =~ m/^($endre)(.*)$/;
1019                 my ($left, $str)  = ($1, $2);
1020                 $str =~ m/^(.*?)($begre)$/;
1021                 my ($mid, $right) = ($1, $2);
1022                 if (length($mid) > 5) {
1023                         $left  =~ s/&[^;]*$//;
1024                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1025                         $mid = " ... ";
1026                 }
1027                 return "$left$mid$right";
1028
1029         } else {
1030                 $str =~ m/^($endre)(.*)$/;
1031                 my $body = $1;
1032                 my $tail = $2;
1033                 if (length($tail) > 4) {
1034                         $body =~ s/&[^;]*$//;
1035                         $tail = "... ";
1036                 }
1037                 return "$body$tail";
1038         }
1039 }
1040
1041 # takes the same arguments as chop_str, but also wraps a <span> around the
1042 # result with a title attribute if it does get chopped. Additionally, the
1043 # string is HTML-escaped.
1044 sub chop_and_escape_str {
1045         my ($str) = @_;
1046
1047         my $chopped = chop_str(@_);
1048         if ($chopped eq $str) {
1049                 return esc_html($chopped);
1050         } else {
1051                 $str =~ s/([[:cntrl:]])/?/g;
1052                 return $cgi->span({-title=>$str}, esc_html($chopped));
1053         }
1054 }
1055
1056 ## ----------------------------------------------------------------------
1057 ## functions returning short strings
1058
1059 # CSS class for given age value (in seconds)
1060 sub age_class {
1061         my $age = shift;
1062
1063         if (!defined $age) {
1064                 return "noage";
1065         } elsif ($age < 60*60*2) {
1066                 return "age0";
1067         } elsif ($age < 60*60*24*2) {
1068                 return "age1";
1069         } else {
1070                 return "age2";
1071         }
1072 }
1073
1074 # convert age in seconds to "nn units ago" string
1075 sub age_string {
1076         my $age = shift;
1077         my $age_str;
1078
1079         if ($age > 60*60*24*365*2) {
1080                 $age_str = (int $age/60/60/24/365);
1081                 $age_str .= " years ago";
1082         } elsif ($age > 60*60*24*(365/12)*2) {
1083                 $age_str = int $age/60/60/24/(365/12);
1084                 $age_str .= " months ago";
1085         } elsif ($age > 60*60*24*7*2) {
1086                 $age_str = int $age/60/60/24/7;
1087                 $age_str .= " weeks ago";
1088         } elsif ($age > 60*60*24*2) {
1089                 $age_str = int $age/60/60/24;
1090                 $age_str .= " days ago";
1091         } elsif ($age > 60*60*2) {
1092                 $age_str = int $age/60/60;
1093                 $age_str .= " hours ago";
1094         } elsif ($age > 60*2) {
1095                 $age_str = int $age/60;
1096                 $age_str .= " min ago";
1097         } elsif ($age > 2) {
1098                 $age_str = int $age;
1099                 $age_str .= " sec ago";
1100         } else {
1101                 $age_str .= " right now";
1102         }
1103         return $age_str;
1104 }
1105
1106 use constant {
1107         S_IFINVALID => 0030000,
1108         S_IFGITLINK => 0160000,
1109 };
1110
1111 # submodule/subproject, a commit object reference
1112 sub S_ISGITLINK($) {
1113         my $mode = shift;
1114
1115         return (($mode & S_IFMT) == S_IFGITLINK)
1116 }
1117
1118 # convert file mode in octal to symbolic file mode string
1119 sub mode_str {
1120         my $mode = oct shift;
1121
1122         if (S_ISGITLINK($mode)) {
1123                 return 'm---------';
1124         } elsif (S_ISDIR($mode & S_IFMT)) {
1125                 return 'drwxr-xr-x';
1126         } elsif (S_ISLNK($mode)) {
1127                 return 'lrwxrwxrwx';
1128         } elsif (S_ISREG($mode)) {
1129                 # git cares only about the executable bit
1130                 if ($mode & S_IXUSR) {
1131                         return '-rwxr-xr-x';
1132                 } else {
1133                         return '-rw-r--r--';
1134                 };
1135         } else {
1136                 return '----------';
1137         }
1138 }
1139
1140 # convert file mode in octal to file type string
1141 sub file_type {
1142         my $mode = shift;
1143
1144         if ($mode !~ m/^[0-7]+$/) {
1145                 return $mode;
1146         } else {
1147                 $mode = oct $mode;
1148         }
1149
1150         if (S_ISGITLINK($mode)) {
1151                 return "submodule";
1152         } elsif (S_ISDIR($mode & S_IFMT)) {
1153                 return "directory";
1154         } elsif (S_ISLNK($mode)) {
1155                 return "symlink";
1156         } elsif (S_ISREG($mode)) {
1157                 return "file";
1158         } else {
1159                 return "unknown";
1160         }
1161 }
1162
1163 # convert file mode in octal to file type description string
1164 sub file_type_long {
1165         my $mode = shift;
1166
1167         if ($mode !~ m/^[0-7]+$/) {
1168                 return $mode;
1169         } else {
1170                 $mode = oct $mode;
1171         }
1172
1173         if (S_ISGITLINK($mode)) {
1174                 return "submodule";
1175         } elsif (S_ISDIR($mode & S_IFMT)) {
1176                 return "directory";
1177         } elsif (S_ISLNK($mode)) {
1178                 return "symlink";
1179         } elsif (S_ISREG($mode)) {
1180                 if ($mode & S_IXUSR) {
1181                         return "executable";
1182                 } else {
1183                         return "file";
1184                 };
1185         } else {
1186                 return "unknown";
1187         }
1188 }
1189
1190
1191 ## ----------------------------------------------------------------------
1192 ## functions returning short HTML fragments, or transforming HTML fragments
1193 ## which don't belong to other sections
1194
1195 # format line of commit message.
1196 sub format_log_line_html {
1197         my $line = shift;
1198
1199         $line = esc_html($line, -nbsp=>1);
1200         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1201                 my $hash_text = $1;
1202                 my $link =
1203                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1204                                 -class => "text"}, $hash_text);
1205                 $line =~ s/$hash_text/$link/;
1206         }
1207         return $line;
1208 }
1209
1210 # format marker of refs pointing to given object
1211
1212 # the destination action is chosen based on object type and current context:
1213 # - for annotated tags, we choose the tag view unless it's the current view
1214 #   already, in which case we go to shortlog view
1215 # - for other refs, we keep the current view if we're in history, shortlog or
1216 #   log view, and select shortlog otherwise
1217 sub format_ref_marker {
1218         my ($refs, $id) = @_;
1219         my $markers = '';
1220
1221         if (defined $refs->{$id}) {
1222                 foreach my $ref (@{$refs->{$id}}) {
1223                         # this code exploits the fact that non-lightweight tags are the
1224                         # only indirect objects, and that they are the only objects for which
1225                         # we want to use tag instead of shortlog as action
1226                         my ($type, $name) = qw();
1227                         my $indirect = ($ref =~ s/\^\{\}$//);
1228                         # e.g. tags/v2.6.11 or heads/next
1229                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1230                                 $type = $1;
1231                                 $name = $2;
1232                         } else {
1233                                 $type = "ref";
1234                                 $name = $ref;
1235                         }
1236
1237                         my $class = $type;
1238                         $class .= " indirect" if $indirect;
1239
1240                         my $dest_action = "shortlog";
1241
1242                         if ($indirect) {
1243                                 $dest_action = "tag" unless $action eq "tag";
1244                         } elsif ($action =~ /^(history|(short)?log)$/) {
1245                                 $dest_action = $action;
1246                         }
1247
1248                         my $dest = "";
1249                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1250                         $dest .= $ref;
1251
1252                         my $link = $cgi->a({
1253                                 -href => href(
1254                                         action=>$dest_action,
1255                                         hash=>$dest
1256                                 )}, $name);
1257
1258                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1259                                 $link . "</span>";
1260                 }
1261         }
1262
1263         if ($markers) {
1264                 return ' <span class="refs">'. $markers . '</span>';
1265         } else {
1266                 return "";
1267         }
1268 }
1269
1270 # format, perhaps shortened and with markers, title line
1271 sub format_subject_html {
1272         my ($long, $short, $href, $extra) = @_;
1273         $extra = '' unless defined($extra);
1274
1275         if (length($short) < length($long)) {
1276                 return $cgi->a({-href => $href, -class => "list subject",
1277                                 -title => to_utf8($long)},
1278                        esc_html($short) . $extra);
1279         } else {
1280                 return $cgi->a({-href => $href, -class => "list subject"},
1281                        esc_html($long)  . $extra);
1282         }
1283 }
1284
1285 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1286 sub format_git_diff_header_line {
1287         my $line = shift;
1288         my $diffinfo = shift;
1289         my ($from, $to) = @_;
1290
1291         if ($diffinfo->{'nparents'}) {
1292                 # combined diff
1293                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1294                 if ($to->{'href'}) {
1295                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1296                                          esc_path($to->{'file'}));
1297                 } else { # file was deleted (no href)
1298                         $line .= esc_path($to->{'file'});
1299                 }
1300         } else {
1301                 # "ordinary" diff
1302                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1303                 if ($from->{'href'}) {
1304                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1305                                          'a/' . esc_path($from->{'file'}));
1306                 } else { # file was added (no href)
1307                         $line .= 'a/' . esc_path($from->{'file'});
1308                 }
1309                 $line .= ' ';
1310                 if ($to->{'href'}) {
1311                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1312                                          'b/' . esc_path($to->{'file'}));
1313                 } else { # file was deleted
1314                         $line .= 'b/' . esc_path($to->{'file'});
1315                 }
1316         }
1317
1318         return "<div class=\"diff header\">$line</div>\n";
1319 }
1320
1321 # format extended diff header line, before patch itself
1322 sub format_extended_diff_header_line {
1323         my $line = shift;
1324         my $diffinfo = shift;
1325         my ($from, $to) = @_;
1326
1327         # match <path>
1328         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1329                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1330                                        esc_path($from->{'file'}));
1331         }
1332         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1333                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1334                                  esc_path($to->{'file'}));
1335         }
1336         # match single <mode>
1337         if ($line =~ m/\s(\d{6})$/) {
1338                 $line .= '<span class="info"> (' .
1339                          file_type_long($1) .
1340                          ')</span>';
1341         }
1342         # match <hash>
1343         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1344                 # can match only for combined diff
1345                 $line = 'index ';
1346                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1347                         if ($from->{'href'}[$i]) {
1348                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1349                                                   -class=>"hash"},
1350                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1351                         } else {
1352                                 $line .= '0' x 7;
1353                         }
1354                         # separator
1355                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1356                 }
1357                 $line .= '..';
1358                 if ($to->{'href'}) {
1359                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1360                                          substr($diffinfo->{'to_id'},0,7));
1361                 } else {
1362                         $line .= '0' x 7;
1363                 }
1364
1365         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1366                 # can match only for ordinary diff
1367                 my ($from_link, $to_link);
1368                 if ($from->{'href'}) {
1369                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1370                                              substr($diffinfo->{'from_id'},0,7));
1371                 } else {
1372                         $from_link = '0' x 7;
1373                 }
1374                 if ($to->{'href'}) {
1375                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1376                                            substr($diffinfo->{'to_id'},0,7));
1377                 } else {
1378                         $to_link = '0' x 7;
1379                 }
1380                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1381                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1382         }
1383
1384         return $line . "<br/>\n";
1385 }
1386
1387 # format from-file/to-file diff header
1388 sub format_diff_from_to_header {
1389         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1390         my $line;
1391         my $result = '';
1392
1393         $line = $from_line;
1394         #assert($line =~ m/^---/) if DEBUG;
1395         # no extra formatting for "^--- /dev/null"
1396         if (! $diffinfo->{'nparents'}) {
1397                 # ordinary (single parent) diff
1398                 if ($line =~ m!^--- "?a/!) {
1399                         if ($from->{'href'}) {
1400                                 $line = '--- a/' .
1401                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1402                                                 esc_path($from->{'file'}));
1403                         } else {
1404                                 $line = '--- a/' .
1405                                         esc_path($from->{'file'});
1406                         }
1407                 }
1408                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1409
1410         } else {
1411                 # combined diff (merge commit)
1412                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1413                         if ($from->{'href'}[$i]) {
1414                                 $line = '--- ' .
1415                                         $cgi->a({-href=>href(action=>"blobdiff",
1416                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1417                                                              hash_parent_base=>$parents[$i],
1418                                                              file_parent=>$from->{'file'}[$i],
1419                                                              hash=>$diffinfo->{'to_id'},
1420                                                              hash_base=>$hash,
1421                                                              file_name=>$to->{'file'}),
1422                                                  -class=>"path",
1423                                                  -title=>"diff" . ($i+1)},
1424                                                 $i+1) .
1425                                         '/' .
1426                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1427                                                 esc_path($from->{'file'}[$i]));
1428                         } else {
1429                                 $line = '--- /dev/null';
1430                         }
1431                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1432                 }
1433         }
1434
1435         $line = $to_line;
1436         #assert($line =~ m/^\+\+\+/) if DEBUG;
1437         # no extra formatting for "^+++ /dev/null"
1438         if ($line =~ m!^\+\+\+ "?b/!) {
1439                 if ($to->{'href'}) {
1440                         $line = '+++ b/' .
1441                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1442                                         esc_path($to->{'file'}));
1443                 } else {
1444                         $line = '+++ b/' .
1445                                 esc_path($to->{'file'});
1446                 }
1447         }
1448         $result .= qq!<div class="diff to_file">$line</div>\n!;
1449
1450         return $result;
1451 }
1452
1453 # create note for patch simplified by combined diff
1454 sub format_diff_cc_simplified {
1455         my ($diffinfo, @parents) = @_;
1456         my $result = '';
1457
1458         $result .= "<div class=\"diff header\">" .
1459                    "diff --cc ";
1460         if (!is_deleted($diffinfo)) {
1461                 $result .= $cgi->a({-href => href(action=>"blob",
1462                                                   hash_base=>$hash,
1463                                                   hash=>$diffinfo->{'to_id'},
1464                                                   file_name=>$diffinfo->{'to_file'}),
1465                                     -class => "path"},
1466                                    esc_path($diffinfo->{'to_file'}));
1467         } else {
1468                 $result .= esc_path($diffinfo->{'to_file'});
1469         }
1470         $result .= "</div>\n" . # class="diff header"
1471                    "<div class=\"diff nodifferences\">" .
1472                    "Simple merge" .
1473                    "</div>\n"; # class="diff nodifferences"
1474
1475         return $result;
1476 }
1477
1478 # format patch (diff) line (not to be used for diff headers)
1479 sub format_diff_line {
1480         my $line = shift;
1481         my ($from, $to) = @_;
1482         my $diff_class = "";
1483
1484         chomp $line;
1485
1486         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1487                 # combined diff
1488                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1489                 if ($line =~ m/^\@{3}/) {
1490                         $diff_class = " chunk_header";
1491                 } elsif ($line =~ m/^\\/) {
1492                         $diff_class = " incomplete";
1493                 } elsif ($prefix =~ tr/+/+/) {
1494                         $diff_class = " add";
1495                 } elsif ($prefix =~ tr/-/-/) {
1496                         $diff_class = " rem";
1497                 }
1498         } else {
1499                 # assume ordinary diff
1500                 my $char = substr($line, 0, 1);
1501                 if ($char eq '+') {
1502                         $diff_class = " add";
1503                 } elsif ($char eq '-') {
1504                         $diff_class = " rem";
1505                 } elsif ($char eq '@') {
1506                         $diff_class = " chunk_header";
1507                 } elsif ($char eq "\\") {
1508                         $diff_class = " incomplete";
1509                 }
1510         }
1511         $line = untabify($line);
1512         if ($from && $to && $line =~ m/^\@{2} /) {
1513                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1514                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1515
1516                 $from_lines = 0 unless defined $from_lines;
1517                 $to_lines   = 0 unless defined $to_lines;
1518
1519                 if ($from->{'href'}) {
1520                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1521                                              -class=>"list"}, $from_text);
1522                 }
1523                 if ($to->{'href'}) {
1524                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1525                                              -class=>"list"}, $to_text);
1526                 }
1527                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1528                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1529                 return "<div class=\"diff$diff_class\">$line</div>\n";
1530         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1531                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1532                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1533
1534                 @from_text = split(' ', $ranges);
1535                 for (my $i = 0; $i < @from_text; ++$i) {
1536                         ($from_start[$i], $from_nlines[$i]) =
1537                                 (split(',', substr($from_text[$i], 1)), 0);
1538                 }
1539
1540                 $to_text   = pop @from_text;
1541                 $to_start  = pop @from_start;
1542                 $to_nlines = pop @from_nlines;
1543
1544                 $line = "<span class=\"chunk_info\">$prefix ";
1545                 for (my $i = 0; $i < @from_text; ++$i) {
1546                         if ($from->{'href'}[$i]) {
1547                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1548                                                   -class=>"list"}, $from_text[$i]);
1549                         } else {
1550                                 $line .= $from_text[$i];
1551                         }
1552                         $line .= " ";
1553                 }
1554                 if ($to->{'href'}) {
1555                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1556                                           -class=>"list"}, $to_text);
1557                 } else {
1558                         $line .= $to_text;
1559                 }
1560                 $line .= " $prefix</span>" .
1561                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1562                 return "<div class=\"diff$diff_class\">$line</div>\n";
1563         }
1564         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1565 }
1566
1567 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1568 # linked.  Pass the hash of the tree/commit to snapshot.
1569 sub format_snapshot_links {
1570         my ($hash) = @_;
1571         my @snapshot_fmts = gitweb_check_feature('snapshot');
1572         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1573         my $num_fmts = @snapshot_fmts;
1574         if ($num_fmts > 1) {
1575                 # A parenthesized list of links bearing format names.
1576                 # e.g. "snapshot (_tar.gz_ _zip_)"
1577                 return "snapshot (" . join(' ', map
1578                         $cgi->a({
1579                                 -href => href(
1580                                         action=>"snapshot",
1581                                         hash=>$hash,
1582                                         snapshot_format=>$_
1583                                 )
1584                         }, $known_snapshot_formats{$_}{'display'})
1585                 , @snapshot_fmts) . ")";
1586         } elsif ($num_fmts == 1) {
1587                 # A single "snapshot" link whose tooltip bears the format name.
1588                 # i.e. "_snapshot_"
1589                 my ($fmt) = @snapshot_fmts;
1590                 return
1591                         $cgi->a({
1592                                 -href => href(
1593                                         action=>"snapshot",
1594                                         hash=>$hash,
1595                                         snapshot_format=>$fmt
1596                                 ),
1597                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1598                         }, "snapshot");
1599         } else { # $num_fmts == 0
1600                 return undef;
1601         }
1602 }
1603
1604 ## ......................................................................
1605 ## functions returning values to be passed, perhaps after some
1606 ## transformation, to other functions; e.g. returning arguments to href()
1607
1608 # returns hash to be passed to href to generate gitweb URL
1609 # in -title key it returns description of link
1610 sub get_feed_info {
1611         my $format = shift || 'Atom';
1612         my %res = (action => lc($format));
1613
1614         # feed links are possible only for project views
1615         return unless (defined $project);
1616         # some views should link to OPML, or to generic project feed,
1617         # or don't have specific feed yet (so they should use generic)
1618         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1619
1620         my $branch;
1621         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1622         # from tag links; this also makes possible to detect branch links
1623         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1624             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1625                 $branch = $1;
1626         }
1627         # find log type for feed description (title)
1628         my $type = 'log';
1629         if (defined $file_name) {
1630                 $type  = "history of $file_name";
1631                 $type .= "/" if ($action eq 'tree');
1632                 $type .= " on '$branch'" if (defined $branch);
1633         } else {
1634                 $type = "log of $branch" if (defined $branch);
1635         }
1636
1637         $res{-title} = $type;
1638         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1639         $res{'file_name'} = $file_name;
1640
1641         return %res;
1642 }
1643
1644 ## ----------------------------------------------------------------------
1645 ## git utility subroutines, invoking git commands
1646
1647 # returns path to the core git executable and the --git-dir parameter as list
1648 sub git_cmd {
1649         return $GIT, '--git-dir='.$git_dir;
1650 }
1651
1652 # quote the given arguments for passing them to the shell
1653 # quote_command("command", "arg 1", "arg with ' and ! characters")
1654 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1655 # Try to avoid using this function wherever possible.
1656 sub quote_command {
1657         return join(' ',
1658                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1659 }
1660
1661 # get HEAD ref of given project as hash
1662 sub git_get_head_hash {
1663         my $project = shift;
1664         my $o_git_dir = $git_dir;
1665         my $retval = undef;
1666         $git_dir = "$projectroot/$project";
1667         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1668                 my $head = <$fd>;
1669                 close $fd;
1670                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1671                         $retval = $1;
1672                 }
1673         }
1674         if (defined $o_git_dir) {
1675                 $git_dir = $o_git_dir;
1676         }
1677         return $retval;
1678 }
1679
1680 # get type of given object
1681 sub git_get_type {
1682         my $hash = shift;
1683
1684         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1685         my $type = <$fd>;
1686         close $fd or return;
1687         chomp $type;
1688         return $type;
1689 }
1690
1691 # repository configuration
1692 our $config_file = '';
1693 our %config;
1694
1695 # store multiple values for single key as anonymous array reference
1696 # single values stored directly in the hash, not as [ <value> ]
1697 sub hash_set_multi {
1698         my ($hash, $key, $value) = @_;
1699
1700         if (!exists $hash->{$key}) {
1701                 $hash->{$key} = $value;
1702         } elsif (!ref $hash->{$key}) {
1703                 $hash->{$key} = [ $hash->{$key}, $value ];
1704         } else {
1705                 push @{$hash->{$key}}, $value;
1706         }
1707 }
1708
1709 # return hash of git project configuration
1710 # optionally limited to some section, e.g. 'gitweb'
1711 sub git_parse_project_config {
1712         my $section_regexp = shift;
1713         my %config;
1714
1715         local $/ = "\0";
1716
1717         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1718                 or return;
1719
1720         while (my $keyval = <$fh>) {
1721                 chomp $keyval;
1722                 my ($key, $value) = split(/\n/, $keyval, 2);
1723
1724                 hash_set_multi(\%config, $key, $value)
1725                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1726         }
1727         close $fh;
1728
1729         return %config;
1730 }
1731
1732 # convert config value to boolean, 'true' or 'false'
1733 # no value, number > 0, 'true' and 'yes' values are true
1734 # rest of values are treated as false (never as error)
1735 sub config_to_bool {
1736         my $val = shift;
1737
1738         # strip leading and trailing whitespace
1739         $val =~ s/^\s+//;
1740         $val =~ s/\s+$//;
1741
1742         return (!defined $val ||               # section.key
1743                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1744                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1745 }
1746
1747 # convert config value to simple decimal number
1748 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1749 # to be multiplied by 1024, 1048576, or 1073741824
1750 sub config_to_int {
1751         my $val = shift;
1752
1753         # strip leading and trailing whitespace
1754         $val =~ s/^\s+//;
1755         $val =~ s/\s+$//;
1756
1757         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1758                 $unit = lc($unit);
1759                 # unknown unit is treated as 1
1760                 return $num * ($unit eq 'g' ? 1073741824 :
1761                                $unit eq 'm' ?    1048576 :
1762                                $unit eq 'k' ?       1024 : 1);
1763         }
1764         return $val;
1765 }
1766
1767 # convert config value to array reference, if needed
1768 sub config_to_multi {
1769         my $val = shift;
1770
1771         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1772 }
1773
1774 sub git_get_project_config {
1775         my ($key, $type) = @_;
1776
1777         # key sanity check
1778         return unless ($key);
1779         $key =~ s/^gitweb\.//;
1780         return if ($key =~ m/\W/);
1781
1782         # type sanity check
1783         if (defined $type) {
1784                 $type =~ s/^--//;
1785                 $type = undef
1786                         unless ($type eq 'bool' || $type eq 'int');
1787         }
1788
1789         # get config
1790         if (!defined $config_file ||
1791             $config_file ne "$git_dir/config") {
1792                 %config = git_parse_project_config('gitweb');
1793                 $config_file = "$git_dir/config";
1794         }
1795
1796         # ensure given type
1797         if (!defined $type) {
1798                 return $config{"gitweb.$key"};
1799         } elsif ($type eq 'bool') {
1800                 # backward compatibility: 'git config --bool' returns true/false
1801                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1802         } elsif ($type eq 'int') {
1803                 return config_to_int($config{"gitweb.$key"});
1804         }
1805         return $config{"gitweb.$key"};
1806 }
1807
1808 # get hash of given path at given ref
1809 sub git_get_hash_by_path {
1810         my $base = shift;
1811         my $path = shift || return undef;
1812         my $type = shift;
1813
1814         $path =~ s,/+$,,;
1815
1816         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1817                 or die_error(500, "Open git-ls-tree failed");
1818         my $line = <$fd>;
1819         close $fd or return undef;
1820
1821         if (!defined $line) {
1822                 # there is no tree or hash given by $path at $base
1823                 return undef;
1824         }
1825
1826         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1827         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1828         if (defined $type && $type ne $2) {
1829                 # type doesn't match
1830                 return undef;
1831         }
1832         return $3;
1833 }
1834
1835 # get path of entry with given hash at given tree-ish (ref)
1836 # used to get 'from' filename for combined diff (merge commit) for renames
1837 sub git_get_path_by_hash {
1838         my $base = shift || return;
1839         my $hash = shift || return;
1840
1841         local $/ = "\0";
1842
1843         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
1844                 or return undef;
1845         while (my $line = <$fd>) {
1846                 chomp $line;
1847
1848                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
1849                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
1850                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
1851                         close $fd;
1852                         return $1;
1853                 }
1854         }
1855         close $fd;
1856         return undef;
1857 }
1858
1859 ## ......................................................................
1860 ## git utility functions, directly accessing git repository
1861
1862 sub git_get_project_description {
1863         my $path = shift;
1864
1865         $git_dir = "$projectroot/$path";
1866         open my $fd, "$git_dir/description"
1867                 or return git_get_project_config('description');
1868         my $descr = <$fd>;
1869         close $fd;
1870         if (defined $descr) {
1871                 chomp $descr;
1872         }
1873         return $descr;
1874 }
1875
1876 sub git_get_project_ctags {
1877         my $path = shift;
1878         my $ctags = {};
1879
1880         $git_dir = "$projectroot/$path";
1881         foreach (<$git_dir/ctags/*>) {
1882                 open CT, $_ or next;
1883                 my $val = <CT>;
1884                 chomp $val;
1885                 close CT;
1886                 my $ctag = $_; $ctag =~ s#.*/##;
1887                 $ctags->{$ctag} = $val;
1888         }
1889         $ctags;
1890 }
1891
1892 sub git_populate_project_tagcloud {
1893         my $ctags = shift;
1894
1895         # First, merge different-cased tags; tags vote on casing
1896         my %ctags_lc;
1897         foreach (keys %$ctags) {
1898                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
1899                 if (not $ctags_lc{lc $_}->{topcount}
1900                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
1901                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
1902                         $ctags_lc{lc $_}->{topname} = $_;
1903                 }
1904         }
1905
1906         my $cloud;
1907         if (eval { require HTML::TagCloud; 1; }) {
1908                 $cloud = HTML::TagCloud->new;
1909                 foreach (sort keys %ctags_lc) {
1910                         # Pad the title with spaces so that the cloud looks
1911                         # less crammed.
1912                         my $title = $ctags_lc{$_}->{topname};
1913                         $title =~ s/ /&nbsp;/g;
1914                         $title =~ s/^/&nbsp;/g;
1915                         $title =~ s/$/&nbsp;/g;
1916                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
1917                 }
1918         } else {
1919                 $cloud = \%ctags_lc;
1920         }
1921         $cloud;
1922 }
1923
1924 sub git_show_project_tagcloud {
1925         my ($cloud, $count) = @_;
1926         print STDERR ref($cloud)."..\n";
1927         if (ref $cloud eq 'HTML::TagCloud') {
1928                 return $cloud->html_and_css($count);
1929         } else {
1930                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
1931                 return '<p align="center">' . join (', ', map {
1932                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
1933                 } splice(@tags, 0, $count)) . '</p>';
1934         }
1935 }
1936
1937 sub git_get_project_url_list {
1938         my $path = shift;
1939
1940         $git_dir = "$projectroot/$path";
1941         open my $fd, "$git_dir/cloneurl"
1942                 or return wantarray ?
1943                 @{ config_to_multi(git_get_project_config('url')) } :
1944                    config_to_multi(git_get_project_config('url'));
1945         my @git_project_url_list = map { chomp; $_ } <$fd>;
1946         close $fd;
1947
1948         return wantarray ? @git_project_url_list : \@git_project_url_list;
1949 }
1950
1951 sub git_get_projects_list {
1952         my ($filter) = @_;
1953         my @list;
1954
1955         $filter ||= '';
1956         $filter =~ s/\.git$//;
1957
1958         my ($check_forks) = gitweb_check_feature('forks');
1959
1960         if (-d $projects_list) {
1961                 # search in directory
1962                 my $dir = $projects_list . ($filter ? "/$filter" : '');
1963                 # remove the trailing "/"
1964                 $dir =~ s!/+$!!;
1965                 my $pfxlen = length("$dir");
1966                 my $pfxdepth = ($dir =~ tr!/!!);
1967
1968                 File::Find::find({
1969                         follow_fast => 1, # follow symbolic links
1970                         follow_skip => 2, # ignore duplicates
1971                         dangling_symlinks => 0, # ignore dangling symlinks, silently
1972                         wanted => sub {
1973                                 # skip project-list toplevel, if we get it.
1974                                 return if (m!^[/.]$!);
1975                                 # only directories can be git repositories
1976                                 return unless (-d $_);
1977                                 # don't traverse too deep (Find is super slow on os x)
1978                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
1979                                         $File::Find::prune = 1;
1980                                         return;
1981                                 }
1982
1983                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
1984                                 # we check related file in $projectroot
1985                                 if (check_export_ok("$projectroot/$filter/$subdir")) {
1986                                         push @list, { path => ($filter ? "$filter/" : '') . $subdir };
1987                                         $File::Find::prune = 1;
1988                                 }
1989                         },
1990                 }, "$dir");
1991
1992         } elsif (-f $projects_list) {
1993                 # read from file(url-encoded):
1994                 # 'git%2Fgit.git Linus+Torvalds'
1995                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
1996                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
1997                 my %paths;
1998                 open my ($fd), $projects_list or return;
1999         PROJECT:
2000                 while (my $line = <$fd>) {
2001                         chomp $line;
2002                         my ($path, $owner) = split ' ', $line;
2003                         $path = unescape($path);
2004                         $owner = unescape($owner);
2005                         if (!defined $path) {
2006                                 next;
2007                         }
2008                         if ($filter ne '') {
2009                                 # looking for forks;
2010                                 my $pfx = substr($path, 0, length($filter));
2011                                 if ($pfx ne $filter) {
2012                                         next PROJECT;
2013                                 }
2014                                 my $sfx = substr($path, length($filter));
2015                                 if ($sfx !~ /^\/.*\.git$/) {
2016                                         next PROJECT;
2017                                 }
2018                         } elsif ($check_forks) {
2019                         PATH:
2020                                 foreach my $filter (keys %paths) {
2021                                         # looking for forks;
2022                                         my $pfx = substr($path, 0, length($filter));
2023                                         if ($pfx ne $filter) {
2024                                                 next PATH;
2025                                         }
2026                                         my $sfx = substr($path, length($filter));
2027                                         if ($sfx !~ /^\/.*\.git$/) {
2028                                                 next PATH;
2029                                         }
2030                                         # is a fork, don't include it in
2031                                         # the list
2032                                         next PROJECT;
2033                                 }
2034                         }
2035                         if (check_export_ok("$projectroot/$path")) {
2036                                 my $pr = {
2037                                         path => $path,
2038                                         owner => to_utf8($owner),
2039                                 };
2040                                 push @list, $pr;
2041                                 (my $forks_path = $path) =~ s/\.git$//;
2042                                 $paths{$forks_path}++;
2043                         }
2044                 }
2045                 close $fd;
2046         }
2047         return @list;
2048 }
2049
2050 our $gitweb_project_owner = undef;
2051 sub git_get_project_list_from_file {
2052
2053         return if (defined $gitweb_project_owner);
2054
2055         $gitweb_project_owner = {};
2056         # read from file (url-encoded):
2057         # 'git%2Fgit.git Linus+Torvalds'
2058         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2059         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2060         if (-f $projects_list) {
2061                 open (my $fd , $projects_list);
2062                 while (my $line = <$fd>) {
2063                         chomp $line;
2064                         my ($pr, $ow) = split ' ', $line;
2065                         $pr = unescape($pr);
2066                         $ow = unescape($ow);
2067                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2068                 }
2069                 close $fd;
2070         }
2071 }
2072
2073 sub git_get_project_owner {
2074         my $project = shift;
2075         my $owner;
2076
2077         return undef unless $project;
2078         $git_dir = "$projectroot/$project";
2079
2080         if (!defined $gitweb_project_owner) {
2081                 git_get_project_list_from_file();
2082         }
2083
2084         if (exists $gitweb_project_owner->{$project}) {
2085                 $owner = $gitweb_project_owner->{$project};
2086         }
2087         if (!defined $owner){
2088                 $owner = git_get_project_config('owner');
2089         }
2090         if (!defined $owner) {
2091                 $owner = get_file_owner("$git_dir");
2092         }
2093
2094         return $owner;
2095 }
2096
2097 sub git_get_last_activity {
2098         my ($path) = @_;
2099         my $fd;
2100
2101         $git_dir = "$projectroot/$path";
2102         open($fd, "-|", git_cmd(), 'for-each-ref',
2103              '--format=%(committer)',
2104              '--sort=-committerdate',
2105              '--count=1',
2106              'refs/heads') or return;
2107         my $most_recent = <$fd>;
2108         close $fd or return;
2109         if (defined $most_recent &&
2110             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2111                 my $timestamp = $1;
2112                 my $age = time - $timestamp;
2113                 return ($age, age_string($age));
2114         }
2115         return (undef, undef);
2116 }
2117
2118 sub git_get_references {
2119         my $type = shift || "";
2120         my %refs;
2121         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2122         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2123         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2124                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2125                 or return;
2126
2127         while (my $line = <$fd>) {
2128                 chomp $line;
2129                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2130                         if (defined $refs{$1}) {
2131                                 push @{$refs{$1}}, $2;
2132                         } else {
2133                                 $refs{$1} = [ $2 ];
2134                         }
2135                 }
2136         }
2137         close $fd or return;
2138         return \%refs;
2139 }
2140
2141 sub git_get_rev_name_tags {
2142         my $hash = shift || return undef;
2143
2144         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2145                 or return;
2146         my $name_rev = <$fd>;
2147         close $fd;
2148
2149         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2150                 return $1;
2151         } else {
2152                 # catches also '$hash undefined' output
2153                 return undef;
2154         }
2155 }
2156
2157 ## ----------------------------------------------------------------------
2158 ## parse to hash functions
2159
2160 sub parse_date {
2161         my $epoch = shift;
2162         my $tz = shift || "-0000";
2163
2164         my %date;
2165         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2166         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2167         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2168         $date{'hour'} = $hour;
2169         $date{'minute'} = $min;
2170         $date{'mday'} = $mday;
2171         $date{'day'} = $days[$wday];
2172         $date{'month'} = $months[$mon];
2173         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2174                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2175         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2176                              $mday, $months[$mon], $hour ,$min;
2177         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2178                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2179
2180         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2181         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2182         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2183         $date{'hour_local'} = $hour;
2184         $date{'minute_local'} = $min;
2185         $date{'tz_local'} = $tz;
2186         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2187                                   1900+$year, $mon+1, $mday,
2188                                   $hour, $min, $sec, $tz);
2189         return %date;
2190 }
2191
2192 sub parse_tag {
2193         my $tag_id = shift;
2194         my %tag;
2195         my @comment;
2196
2197         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2198         $tag{'id'} = $tag_id;
2199         while (my $line = <$fd>) {
2200                 chomp $line;
2201                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2202                         $tag{'object'} = $1;
2203                 } elsif ($line =~ m/^type (.+)$/) {
2204                         $tag{'type'} = $1;
2205                 } elsif ($line =~ m/^tag (.+)$/) {
2206                         $tag{'name'} = $1;
2207                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2208                         $tag{'author'} = $1;
2209                         $tag{'epoch'} = $2;
2210                         $tag{'tz'} = $3;
2211                 } elsif ($line =~ m/--BEGIN/) {
2212                         push @comment, $line;
2213                         last;
2214                 } elsif ($line eq "") {
2215                         last;
2216                 }
2217         }
2218         push @comment, <$fd>;
2219         $tag{'comment'} = \@comment;
2220         close $fd or return;
2221         if (!defined $tag{'name'}) {
2222                 return
2223         };
2224         return %tag
2225 }
2226
2227 sub parse_commit_text {
2228         my ($commit_text, $withparents) = @_;
2229         my @commit_lines = split '\n', $commit_text;
2230         my %co;
2231
2232         pop @commit_lines; # Remove '\0'
2233
2234         if (! @commit_lines) {
2235                 return;
2236         }
2237
2238         my $header = shift @commit_lines;
2239         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2240                 return;
2241         }
2242         ($co{'id'}, my @parents) = split ' ', $header;
2243         while (my $line = shift @commit_lines) {
2244                 last if $line eq "\n";
2245                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2246                         $co{'tree'} = $1;
2247                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2248                         push @parents, $1;
2249                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2250                         $co{'author'} = $1;
2251                         $co{'author_epoch'} = $2;
2252                         $co{'author_tz'} = $3;
2253                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2254                                 $co{'author_name'}  = $1;
2255                                 $co{'author_email'} = $2;
2256                         } else {
2257                                 $co{'author_name'} = $co{'author'};
2258                         }
2259                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2260                         $co{'committer'} = $1;
2261                         $co{'committer_epoch'} = $2;
2262                         $co{'committer_tz'} = $3;
2263                         $co{'committer_name'} = $co{'committer'};
2264                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2265                                 $co{'committer_name'}  = $1;
2266                                 $co{'committer_email'} = $2;
2267                         } else {
2268                                 $co{'committer_name'} = $co{'committer'};
2269                         }
2270                 }
2271         }
2272         if (!defined $co{'tree'}) {
2273                 return;
2274         };
2275         $co{'parents'} = \@parents;
2276         $co{'parent'} = $parents[0];
2277
2278         foreach my $title (@commit_lines) {
2279                 $title =~ s/^    //;
2280                 if ($title ne "") {
2281                         $co{'title'} = chop_str($title, 80, 5);
2282                         # remove leading stuff of merges to make the interesting part visible
2283                         if (length($title) > 50) {
2284                                 $title =~ s/^Automatic //;
2285                                 $title =~ s/^merge (of|with) /Merge ... /i;
2286                                 if (length($title) > 50) {
2287                                         $title =~ s/(http|rsync):\/\///;
2288                                 }
2289                                 if (length($title) > 50) {
2290                                         $title =~ s/(master|www|rsync)\.//;
2291                                 }
2292                                 if (length($title) > 50) {
2293                                         $title =~ s/kernel.org:?//;
2294                                 }
2295                                 if (length($title) > 50) {
2296                                         $title =~ s/\/pub\/scm//;
2297                                 }
2298                         }
2299                         $co{'title_short'} = chop_str($title, 50, 5);
2300                         last;
2301                 }
2302         }
2303         if (! defined $co{'title'} || $co{'title'} eq "") {
2304                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2305         }
2306         # remove added spaces
2307         foreach my $line (@commit_lines) {
2308                 $line =~ s/^    //;
2309         }
2310         $co{'comment'} = \@commit_lines;
2311
2312         my $age = time - $co{'committer_epoch'};
2313         $co{'age'} = $age;
2314         $co{'age_string'} = age_string($age);
2315         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2316         if ($age > 60*60*24*7*2) {
2317                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2318                 $co{'age_string_age'} = $co{'age_string'};
2319         } else {
2320                 $co{'age_string_date'} = $co{'age_string'};
2321                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2322         }
2323         return %co;
2324 }
2325
2326 sub parse_commit {
2327         my ($commit_id) = @_;
2328         my %co;
2329
2330         local $/ = "\0";
2331
2332         open my $fd, "-|", git_cmd(), "rev-list",
2333                 "--parents",
2334                 "--header",
2335                 "--max-count=1",
2336                 $commit_id,
2337                 "--",
2338                 or die_error(500, "Open git-rev-list failed");
2339         %co = parse_commit_text(<$fd>, 1);
2340         close $fd;
2341
2342         return %co;
2343 }
2344
2345 sub parse_commits {
2346         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2347         my @cos;
2348
2349         $maxcount ||= 1;
2350         $skip ||= 0;
2351
2352         local $/ = "\0";
2353
2354         open my $fd, "-|", git_cmd(), "rev-list",
2355                 "--header",
2356                 @args,
2357                 ("--max-count=" . $maxcount),
2358                 ("--skip=" . $skip),
2359                 @extra_options,
2360                 $commit_id,
2361                 "--",
2362                 ($filename ? ($filename) : ())
2363                 or die_error(500, "Open git-rev-list failed");
2364         while (my $line = <$fd>) {
2365                 my %co = parse_commit_text($line);
2366                 push @cos, \%co;
2367         }
2368         close $fd;
2369
2370         return wantarray ? @cos : \@cos;
2371 }
2372
2373 # parse line of git-diff-tree "raw" output
2374 sub parse_difftree_raw_line {
2375         my $line = shift;
2376         my %res;
2377
2378         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2379         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2380         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2381                 $res{'from_mode'} = $1;
2382                 $res{'to_mode'} = $2;
2383                 $res{'from_id'} = $3;
2384                 $res{'to_id'} = $4;
2385                 $res{'status'} = $5;
2386                 $res{'similarity'} = $6;
2387                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2388                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2389                 } else {
2390                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2391                 }
2392         }
2393         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2394         # combined diff (for merge commit)
2395         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2396                 $res{'nparents'}  = length($1);
2397                 $res{'from_mode'} = [ split(' ', $2) ];
2398                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2399                 $res{'from_id'} = [ split(' ', $3) ];
2400                 $res{'to_id'} = pop @{$res{'from_id'}};
2401                 $res{'status'} = [ split('', $4) ];
2402                 $res{'to_file'} = unquote($5);
2403         }
2404         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2405         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2406                 $res{'commit'} = $1;
2407         }
2408
2409         return wantarray ? %res : \%res;
2410 }
2411
2412 # wrapper: return parsed line of git-diff-tree "raw" output
2413 # (the argument might be raw line, or parsed info)
2414 sub parsed_difftree_line {
2415         my $line_or_ref = shift;
2416
2417         if (ref($line_or_ref) eq "HASH") {
2418                 # pre-parsed (or generated by hand)
2419                 return $line_or_ref;
2420         } else {
2421                 return parse_difftree_raw_line($line_or_ref);
2422         }
2423 }
2424
2425 # parse line of git-ls-tree output
2426 sub parse_ls_tree_line ($;%) {
2427         my $line = shift;
2428         my %opts = @_;
2429         my %res;
2430
2431         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2432         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2433
2434         $res{'mode'} = $1;
2435         $res{'type'} = $2;
2436         $res{'hash'} = $3;
2437         if ($opts{'-z'}) {
2438                 $res{'name'} = $4;
2439         } else {
2440                 $res{'name'} = unquote($4);
2441         }
2442
2443         return wantarray ? %res : \%res;
2444 }
2445
2446 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2447 sub parse_from_to_diffinfo {
2448         my ($diffinfo, $from, $to, @parents) = @_;
2449
2450         if ($diffinfo->{'nparents'}) {
2451                 # combined diff
2452                 $from->{'file'} = [];
2453                 $from->{'href'} = [];
2454                 fill_from_file_info($diffinfo, @parents)
2455                         unless exists $diffinfo->{'from_file'};
2456                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2457                         $from->{'file'}[$i] =
2458                                 defined $diffinfo->{'from_file'}[$i] ?
2459                                         $diffinfo->{'from_file'}[$i] :
2460                                         $diffinfo->{'to_file'};
2461                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2462                                 $from->{'href'}[$i] = href(action=>"blob",
2463                                                            hash_base=>$parents[$i],
2464                                                            hash=>$diffinfo->{'from_id'}[$i],
2465                                                            file_name=>$from->{'file'}[$i]);
2466                         } else {
2467                                 $from->{'href'}[$i] = undef;
2468                         }
2469                 }
2470         } else {
2471                 # ordinary (not combined) diff
2472                 $from->{'file'} = $diffinfo->{'from_file'};
2473                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2474                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2475                                                hash=>$diffinfo->{'from_id'},
2476                                                file_name=>$from->{'file'});
2477                 } else {
2478                         delete $from->{'href'};
2479                 }
2480         }
2481
2482         $to->{'file'} = $diffinfo->{'to_file'};
2483         if (!is_deleted($diffinfo)) { # file exists in result
2484                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2485                                      hash=>$diffinfo->{'to_id'},
2486                                      file_name=>$to->{'file'});
2487         } else {
2488                 delete $to->{'href'};
2489         }
2490 }
2491
2492 ## ......................................................................
2493 ## parse to array of hashes functions
2494
2495 sub git_get_heads_list {
2496         my $limit = shift;
2497         my @headslist;
2498
2499         open my $fd, '-|', git_cmd(), 'for-each-ref',
2500                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2501                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2502                 'refs/heads'
2503                 or return;
2504         while (my $line = <$fd>) {
2505                 my %ref_item;
2506
2507                 chomp $line;
2508                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2509                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2510                 my ($committer, $epoch, $tz) =
2511                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2512                 $ref_item{'fullname'}  = $name;
2513                 $name =~ s!^refs/heads/!!;
2514
2515                 $ref_item{'name'}  = $name;
2516                 $ref_item{'id'}    = $hash;
2517                 $ref_item{'title'} = $title || '(no commit message)';
2518                 $ref_item{'epoch'} = $epoch;
2519                 if ($epoch) {
2520                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2521                 } else {
2522                         $ref_item{'age'} = "unknown";
2523                 }
2524
2525                 push @headslist, \%ref_item;
2526         }
2527         close $fd;
2528
2529         return wantarray ? @headslist : \@headslist;
2530 }
2531
2532 sub git_get_tags_list {
2533         my $limit = shift;
2534         my @tagslist;
2535
2536         open my $fd, '-|', git_cmd(), 'for-each-ref',
2537                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2538                 '--format=%(objectname) %(objecttype) %(refname) '.
2539                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2540                 'refs/tags'
2541                 or return;
2542         while (my $line = <$fd>) {
2543                 my %ref_item;
2544
2545                 chomp $line;
2546                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2547                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2548                 my ($creator, $epoch, $tz) =
2549                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2550                 $ref_item{'fullname'} = $name;
2551                 $name =~ s!^refs/tags/!!;
2552
2553                 $ref_item{'type'} = $type;
2554                 $ref_item{'id'} = $id;
2555                 $ref_item{'name'} = $name;
2556                 if ($type eq "tag") {
2557                         $ref_item{'subject'} = $title;
2558                         $ref_item{'reftype'} = $reftype;
2559                         $ref_item{'refid'}   = $refid;
2560                 } else {
2561                         $ref_item{'reftype'} = $type;
2562                         $ref_item{'refid'}   = $id;
2563                 }
2564
2565                 if ($type eq "tag" || $type eq "commit") {
2566                         $ref_item{'epoch'} = $epoch;
2567                         if ($epoch) {
2568                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2569                         } else {
2570                                 $ref_item{'age'} = "unknown";
2571                         }
2572                 }
2573
2574                 push @tagslist, \%ref_item;
2575         }
2576         close $fd;
2577
2578         return wantarray ? @tagslist : \@tagslist;
2579 }
2580
2581 ## ----------------------------------------------------------------------
2582 ## filesystem-related functions
2583
2584 sub get_file_owner {
2585         my $path = shift;
2586
2587         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2588         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2589         if (!defined $gcos) {
2590                 return undef;
2591         }
2592         my $owner = $gcos;
2593         $owner =~ s/[,;].*$//;
2594         return to_utf8($owner);
2595 }
2596
2597 ## ......................................................................
2598 ## mimetype related functions
2599
2600 sub mimetype_guess_file {
2601         my $filename = shift;
2602         my $mimemap = shift;
2603         -r $mimemap or return undef;
2604
2605         my %mimemap;
2606         open(MIME, $mimemap) or return undef;
2607         while (<MIME>) {
2608                 next if m/^#/; # skip comments
2609                 my ($mime, $exts) = split(/\t+/);
2610                 if (defined $exts) {
2611                         my @exts = split(/\s+/, $exts);
2612                         foreach my $ext (@exts) {
2613                                 $mimemap{$ext} = $mime;
2614                         }
2615                 }
2616         }
2617         close(MIME);
2618
2619         $filename =~ /\.([^.]*)$/;
2620         return $mimemap{$1};
2621 }
2622
2623 sub mimetype_guess {
2624         my $filename = shift;
2625         my $mime;
2626         $filename =~ /\./ or return undef;
2627
2628         if ($mimetypes_file) {
2629                 my $file = $mimetypes_file;
2630                 if ($file !~ m!^/!) { # if it is relative path
2631                         # it is relative to project
2632                         $file = "$projectroot/$project/$file";
2633                 }
2634                 $mime = mimetype_guess_file($filename, $file);
2635         }
2636         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2637         return $mime;
2638 }
2639
2640 sub blob_mimetype {
2641         my $fd = shift;
2642         my $filename = shift;
2643
2644         if ($filename) {
2645                 my $mime = mimetype_guess($filename);
2646                 $mime and return $mime;
2647         }
2648
2649         # just in case
2650         return $default_blob_plain_mimetype unless $fd;
2651
2652         if (-T $fd) {
2653                 return 'text/plain';
2654         } elsif (! $filename) {
2655                 return 'application/octet-stream';
2656         } elsif ($filename =~ m/\.png$/i) {
2657                 return 'image/png';
2658         } elsif ($filename =~ m/\.gif$/i) {
2659                 return 'image/gif';
2660         } elsif ($filename =~ m/\.jpe?g$/i) {
2661                 return 'image/jpeg';
2662         } else {
2663                 return 'application/octet-stream';
2664         }
2665 }
2666
2667 sub blob_contenttype {
2668         my ($fd, $file_name, $type) = @_;
2669
2670         $type ||= blob_mimetype($fd, $file_name);
2671         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2672                 $type .= "; charset=$default_text_plain_charset";
2673         }
2674
2675         return $type;
2676 }
2677
2678 ## ======================================================================
2679 ## functions printing HTML: header, footer, error page
2680
2681 sub git_header_html {
2682         my $status = shift || "200 OK";
2683         my $expires = shift;
2684
2685         my $title = "$site_name";
2686         if (defined $project) {
2687                 $title .= " - " . to_utf8($project);
2688                 if (defined $action) {
2689                         $title .= "/$action";
2690                         if (defined $file_name) {
2691                                 $title .= " - " . esc_path($file_name);
2692                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2693                                         $title .= "/";
2694                                 }
2695                         }
2696                 }
2697         }
2698         my $content_type;
2699         # require explicit support from the UA if we are to send the page as
2700         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2701         # we have to do this because MSIE sometimes globs '*/*', pretending to
2702         # support xhtml+xml but choking when it gets what it asked for.
2703         if (defined $cgi->http('HTTP_ACCEPT') &&
2704             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2705             $cgi->Accept('application/xhtml+xml') != 0) {
2706                 $content_type = 'application/xhtml+xml';
2707         } else {
2708                 $content_type = 'text/html';
2709         }
2710         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2711                            -status=> $status, -expires => $expires);
2712         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2713         print <<EOF;
2714 <?xml version="1.0" encoding="utf-8"?>
2715 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2716 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2717 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2718 <!-- git core binaries version $git_version -->
2719 <head>
2720 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2721 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2722 <meta name="robots" content="index, nofollow"/>
2723 <title>$title</title>
2724 EOF
2725 # print out each stylesheet that exist
2726         if (defined $stylesheet) {
2727 #provides backwards capability for those people who define style sheet in a config file
2728                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2729         } else {
2730                 foreach my $stylesheet (@stylesheets) {
2731                         next unless $stylesheet;
2732                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2733                 }
2734         }
2735         if (defined $project) {
2736                 my %href_params = get_feed_info();
2737                 if (!exists $href_params{'-title'}) {
2738                         $href_params{'-title'} = 'log';
2739                 }
2740
2741                 foreach my $format qw(RSS Atom) {
2742                         my $type = lc($format);
2743                         my %link_attr = (
2744                                 '-rel' => 'alternate',
2745                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2746                                 '-type' => "application/$type+xml"
2747                         );
2748
2749                         $href_params{'action'} = $type;
2750                         $link_attr{'-href'} = href(%href_params);
2751                         print "<link ".
2752                               "rel=\"$link_attr{'-rel'}\" ".
2753                               "title=\"$link_attr{'-title'}\" ".
2754                               "href=\"$link_attr{'-href'}\" ".
2755                               "type=\"$link_attr{'-type'}\" ".
2756                               "/>\n";
2757
2758                         $href_params{'extra_options'} = '--no-merges';
2759                         $link_attr{'-href'} = href(%href_params);
2760                         $link_attr{'-title'} .= ' (no merges)';
2761                         print "<link ".
2762                               "rel=\"$link_attr{'-rel'}\" ".
2763                               "title=\"$link_attr{'-title'}\" ".
2764                               "href=\"$link_attr{'-href'}\" ".
2765                               "type=\"$link_attr{'-type'}\" ".
2766                               "/>\n";
2767                 }
2768
2769         } else {
2770                 printf('<link rel="alternate" title="%s projects list" '.
2771                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2772                        $site_name, href(project=>undef, action=>"project_index"));
2773                 printf('<link rel="alternate" title="%s projects feeds" '.
2774                        'href="%s" type="text/x-opml" />'."\n",
2775                        $site_name, href(project=>undef, action=>"opml"));
2776         }
2777         if (defined $favicon) {
2778                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2779         }
2780
2781         print "</head>\n" .
2782               "<body>\n";
2783
2784         if (-f $site_header) {
2785                 open (my $fd, $site_header);
2786                 print <$fd>;
2787                 close $fd;
2788         }
2789
2790         print "<div class=\"page_header\">\n" .
2791               $cgi->a({-href => esc_url($logo_url),
2792                        -title => $logo_label},
2793                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2794         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2795         if (defined $project) {
2796                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2797                 if (defined $action) {
2798                         print " / $action";
2799                 }
2800                 print "\n";
2801         }
2802         print "</div>\n";
2803
2804         my ($have_search) = gitweb_check_feature('search');
2805         if (defined $project && $have_search) {
2806                 if (!defined $searchtext) {
2807                         $searchtext = "";
2808                 }
2809                 my $search_hash;
2810                 if (defined $hash_base) {
2811                         $search_hash = $hash_base;
2812                 } elsif (defined $hash) {
2813                         $search_hash = $hash;
2814                 } else {
2815                         $search_hash = "HEAD";
2816                 }
2817                 my $action = $my_uri;
2818                 my ($use_pathinfo) = gitweb_check_feature('pathinfo');
2819                 if ($use_pathinfo) {
2820                         $action .= "/".esc_url($project);
2821                 }
2822                 print $cgi->startform(-method => "get", -action => $action) .
2823                       "<div class=\"search\">\n" .
2824                       (!$use_pathinfo &&
2825                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
2826                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
2827                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
2828                       $cgi->popup_menu(-name => 'st', -default => 'commit',
2829                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
2830                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
2831                       " search:\n",
2832                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
2833                       "<span title=\"Extended regular expression\">" .
2834                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
2835                                      -checked => $search_use_regexp) .
2836                       "</span>" .
2837                       "</div>" .
2838                       $cgi->end_form() . "\n";
2839         }
2840 }
2841
2842 sub git_footer_html {
2843         my $feed_class = 'rss_logo';
2844
2845         print "<div class=\"page_footer\">\n";
2846         if (defined $project) {
2847                 my $descr = git_get_project_description($project);
2848                 if (defined $descr) {
2849                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
2850                 }
2851
2852                 my %href_params = get_feed_info();
2853                 if (!%href_params) {
2854                         $feed_class .= ' generic';
2855                 }
2856                 $href_params{'-title'} ||= 'log';
2857
2858                 foreach my $format qw(RSS Atom) {
2859                         $href_params{'action'} = lc($format);
2860                         print $cgi->a({-href => href(%href_params),
2861                                       -title => "$href_params{'-title'} $format feed",
2862                                       -class => $feed_class}, $format)."\n";
2863                 }
2864
2865         } else {
2866                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
2867                               -class => $feed_class}, "OPML") . " ";
2868                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
2869                               -class => $feed_class}, "TXT") . "\n";
2870         }
2871         print "</div>\n"; # class="page_footer"
2872
2873         if (-f $site_footer) {
2874                 open (my $fd, $site_footer);
2875                 print <$fd>;
2876                 close $fd;
2877         }
2878
2879         print "</body>\n" .
2880               "</html>";
2881 }
2882
2883 # die_error(<http_status_code>, <error_message>)
2884 # Example: die_error(404, 'Hash not found')
2885 # By convention, use the following status codes (as defined in RFC 2616):
2886 # 400: Invalid or missing CGI parameters, or
2887 #      requested object exists but has wrong type.
2888 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
2889 #      this server or project.
2890 # 404: Requested object/revision/project doesn't exist.
2891 # 500: The server isn't configured properly, or
2892 #      an internal error occurred (e.g. failed assertions caused by bugs), or
2893 #      an unknown error occurred (e.g. the git binary died unexpectedly).
2894 sub die_error {
2895         my $status = shift || 500;
2896         my $error = shift || "Internal server error";
2897
2898         my %http_responses = (400 => '400 Bad Request',
2899                               403 => '403 Forbidden',
2900                               404 => '404 Not Found',
2901                               500 => '500 Internal Server Error');
2902         git_header_html($http_responses{$status});
2903         print <<EOF;
2904 <div class="page_body">
2905 <br /><br />
2906 $status - $error
2907 <br />
2908 </div>
2909 EOF
2910         git_footer_html();
2911         exit;
2912 }
2913
2914 ## ----------------------------------------------------------------------
2915 ## functions printing or outputting HTML: navigation
2916
2917 sub git_print_page_nav {
2918         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
2919         $extra = '' if !defined $extra; # pager or formats
2920
2921         my @navs = qw(summary shortlog log commit commitdiff tree);
2922         if ($suppress) {
2923                 @navs = grep { $_ ne $suppress } @navs;
2924         }
2925
2926         my %arg = map { $_ => {action=>$_} } @navs;
2927         if (defined $head) {
2928                 for (qw(commit commitdiff)) {
2929                         $arg{$_}{'hash'} = $head;
2930                 }
2931                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
2932                         for (qw(shortlog log)) {
2933                                 $arg{$_}{'hash'} = $head;
2934                         }
2935                 }
2936         }
2937
2938         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
2939         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
2940
2941         my @actions = gitweb_check_feature('actions');
2942         while (@actions) {
2943                 my ($label, $link, $pos) = (shift(@actions), shift(@actions), shift(@actions));
2944                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
2945                 # munch munch
2946                 $link =~ s#%n#$project#g;
2947                 $link =~ s#%f#$git_dir#g;
2948                 $treehead ? $link =~ s#%h#$treehead#g : $link =~ s#%h##g;
2949                 $treebase ? $link =~ s#%b#$treebase#g : $link =~ s#%b##g;
2950                 $arg{$label}{'_href'} = $link;
2951         }
2952
2953         print "<div class=\"page_nav\">\n" .
2954                 (join " | ",
2955                  map { $_ eq $current ?
2956                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
2957                  } @navs);
2958         print "<br/>\n$extra<br/>\n" .
2959               "</div>\n";
2960 }
2961
2962 sub format_paging_nav {
2963         my ($action, $hash, $head, $page, $has_next_link) = @_;
2964         my $paging_nav;
2965
2966
2967         if ($hash ne $head || $page) {
2968                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
2969         } else {
2970                 $paging_nav .= "HEAD";
2971         }
2972
2973         if ($page > 0) {
2974                 $paging_nav .= " &sdot; " .
2975                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
2976                                  -accesskey => "p", -title => "Alt-p"}, "prev");
2977         } else {
2978                 $paging_nav .= " &sdot; prev";
2979         }
2980
2981         if ($has_next_link) {
2982                 $paging_nav .= " &sdot; " .
2983                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
2984                                  -accesskey => "n", -title => "Alt-n"}, "next");
2985         } else {
2986                 $paging_nav .= " &sdot; next";
2987         }
2988
2989         return $paging_nav;
2990 }
2991
2992 ## ......................................................................
2993 ## functions printing or outputting HTML: div
2994
2995 sub git_print_header_div {
2996         my ($action, $title, $hash, $hash_base) = @_;
2997         my %args = ();
2998
2999         $args{'action'} = $action;
3000         $args{'hash'} = $hash if $hash;
3001         $args{'hash_base'} = $hash_base if $hash_base;
3002
3003         print "<div class=\"header\">\n" .
3004               $cgi->a({-href => href(%args), -class => "title"},
3005               $title ? $title : $action) .
3006               "\n</div>\n";
3007 }
3008
3009 #sub git_print_authorship (\%) {
3010 sub git_print_authorship {
3011         my $co = shift;
3012
3013         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3014         print "<div class=\"author_date\">" .
3015               esc_html($co->{'author_name'}) .
3016               " [$ad{'rfc2822'}";
3017         if ($ad{'hour_local'} < 6) {
3018                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3019                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3020         } else {
3021                 printf(" (%02d:%02d %s)",
3022                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3023         }
3024         print "]</div>\n";
3025 }
3026
3027 sub git_print_page_path {
3028         my $name = shift;
3029         my $type = shift;
3030         my $hb = shift;
3031
3032
3033         print "<div class=\"page_path\">";
3034         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3035                       -title => 'tree root'}, to_utf8("[$project]"));
3036         print " / ";
3037         if (defined $name) {
3038                 my @dirname = split '/', $name;
3039                 my $basename = pop @dirname;
3040                 my $fullname = '';
3041
3042                 foreach my $dir (@dirname) {
3043                         $fullname .= ($fullname ? '/' : '') . $dir;
3044                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3045                                                      hash_base=>$hb),
3046                                       -title => $fullname}, esc_path($dir));
3047                         print " / ";
3048                 }
3049                 if (defined $type && $type eq 'blob') {
3050                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3051                                                      hash_base=>$hb),
3052                                       -title => $name}, esc_path($basename));
3053                 } elsif (defined $type && $type eq 'tree') {
3054                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3055                                                      hash_base=>$hb),
3056                                       -title => $name}, esc_path($basename));
3057                         print " / ";
3058                 } else {
3059                         print esc_path($basename);
3060                 }
3061         }
3062         print "<br/></div>\n";
3063 }
3064
3065 # sub git_print_log (\@;%) {
3066 sub git_print_log ($;%) {
3067         my $log = shift;
3068         my %opts = @_;
3069
3070         if ($opts{'-remove_title'}) {
3071                 # remove title, i.e. first line of log
3072                 shift @$log;
3073         }
3074         # remove leading empty lines
3075         while (defined $log->[0] && $log->[0] eq "") {
3076                 shift @$log;
3077         }
3078
3079         # print log
3080         my $signoff = 0;
3081         my $empty = 0;
3082         foreach my $line (@$log) {
3083                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3084                         $signoff = 1;
3085                         $empty = 0;
3086                         if (! $opts{'-remove_signoff'}) {
3087                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3088                                 next;
3089                         } else {
3090                                 # remove signoff lines
3091                                 next;
3092                         }
3093                 } else {
3094                         $signoff = 0;
3095                 }
3096
3097                 # print only one empty line
3098                 # do not print empty line after signoff
3099                 if ($line eq "") {
3100                         next if ($empty || $signoff);
3101                         $empty = 1;
3102                 } else {
3103                         $empty = 0;
3104                 }
3105
3106                 print format_log_line_html($line) . "<br/>\n";
3107         }
3108
3109         if ($opts{'-final_empty_line'}) {
3110                 # end with single empty line
3111                 print "<br/>\n" unless $empty;
3112         }
3113 }
3114
3115 # return link target (what link points to)
3116 sub git_get_link_target {
3117         my $hash = shift;
3118         my $link_target;
3119
3120         # read link
3121         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3122                 or return;
3123         {
3124                 local $/;
3125                 $link_target = <$fd>;
3126         }
3127         close $fd
3128                 or return;
3129
3130         return $link_target;
3131 }
3132
3133 # given link target, and the directory (basedir) the link is in,
3134 # return target of link relative to top directory (top tree);
3135 # return undef if it is not possible (including absolute links).
3136 sub normalize_link_target {
3137         my ($link_target, $basedir, $hash_base) = @_;
3138
3139         # we can normalize symlink target only if $hash_base is provided
3140         return unless $hash_base;
3141
3142         # absolute symlinks (beginning with '/') cannot be normalized
3143         return if (substr($link_target, 0, 1) eq '/');
3144
3145         # normalize link target to path from top (root) tree (dir)
3146         my $path;
3147         if ($basedir) {
3148                 $path = $basedir . '/' . $link_target;
3149         } else {
3150                 # we are in top (root) tree (dir)
3151                 $path = $link_target;
3152         }
3153
3154         # remove //, /./, and /../
3155         my @path_parts;
3156         foreach my $part (split('/', $path)) {
3157                 # discard '.' and ''
3158                 next if (!$part || $part eq '.');
3159                 # handle '..'
3160                 if ($part eq '..') {
3161                         if (@path_parts) {
3162                                 pop @path_parts;
3163                         } else {
3164                                 # link leads outside repository (outside top dir)
3165                                 return;
3166                         }
3167                 } else {
3168                         push @path_parts, $part;
3169                 }
3170         }
3171         $path = join('/', @path_parts);
3172
3173         return $path;
3174 }
3175
3176 # print tree entry (row of git_tree), but without encompassing <tr> element
3177 sub git_print_tree_entry {
3178         my ($t, $basedir, $hash_base, $have_blame) = @_;
3179
3180         my %base_key = ();
3181         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3182
3183         # The format of a table row is: mode list link.  Where mode is
3184         # the mode of the entry, list is the name of the entry, an href,
3185         # and link is the action links of the entry.
3186
3187         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3188         if ($t->{'type'} eq "blob") {
3189                 print "<td class=\"list\">" .
3190                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3191                                                file_name=>"$basedir$t->{'name'}", %base_key),
3192                                 -class => "list"}, esc_path($t->{'name'}));
3193                 if (S_ISLNK(oct $t->{'mode'})) {
3194                         my $link_target = git_get_link_target($t->{'hash'});
3195                         if ($link_target) {
3196                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3197                                 if (defined $norm_target) {
3198                                         print " -> " .
3199                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3200                                                                      file_name=>$norm_target),
3201                                                        -title => $norm_target}, esc_path($link_target));
3202                                 } else {
3203                                         print " -> " . esc_path($link_target);
3204                                 }
3205                         }
3206                 }
3207                 print "</td>\n";
3208                 print "<td class=\"link\">";
3209                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3210                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3211                               "blob");
3212                 if ($have_blame) {
3213                         print " | " .
3214                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3215                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3216                                       "blame");
3217                 }
3218                 if (defined $hash_base) {
3219                         print " | " .
3220                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3221                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3222                                       "history");
3223                 }
3224                 print " | " .
3225                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3226                                                file_name=>"$basedir$t->{'name'}")},
3227                                 "raw");
3228                 print "</td>\n";
3229
3230         } elsif ($t->{'type'} eq "tree") {
3231                 print "<td class=\"list\">";
3232                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3233                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3234                               esc_path($t->{'name'}));
3235                 print "</td>\n";
3236                 print "<td class=\"link\">";
3237                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3238                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3239                               "tree");
3240                 if (defined $hash_base) {
3241                         print " | " .
3242                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3243                                                      file_name=>"$basedir$t->{'name'}")},
3244                                       "history");
3245                 }
3246                 print "</td>\n";
3247         } else {
3248                 # unknown object: we can only present history for it
3249                 # (this includes 'commit' object, i.e. submodule support)
3250                 print "<td class=\"list\">" .
3251                       esc_path($t->{'name'}) .
3252                       "</td>\n";
3253                 print "<td class=\"link\">";
3254                 if (defined $hash_base) {
3255                         print $cgi->a({-href => href(action=>"history",
3256                                                      hash_base=>$hash_base,
3257                                                      file_name=>"$basedir$t->{'name'}")},
3258                                       "history");
3259                 }
3260                 print "</td>\n";
3261         }
3262 }
3263
3264 ## ......................................................................
3265 ## functions printing large fragments of HTML
3266
3267 # get pre-image filenames for merge (combined) diff
3268 sub fill_from_file_info {
3269         my ($diff, @parents) = @_;
3270
3271         $diff->{'from_file'} = [ ];
3272         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3273         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3274                 if ($diff->{'status'}[$i] eq 'R' ||
3275                     $diff->{'status'}[$i] eq 'C') {
3276                         $diff->{'from_file'}[$i] =
3277                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3278                 }
3279         }
3280
3281         return $diff;
3282 }
3283
3284 # is current raw difftree line of file deletion
3285 sub is_deleted {
3286         my $diffinfo = shift;
3287
3288         return $diffinfo->{'to_id'} eq ('0' x 40);
3289 }
3290
3291 # does patch correspond to [previous] difftree raw line
3292 # $diffinfo  - hashref of parsed raw diff format
3293 # $patchinfo - hashref of parsed patch diff format
3294 #              (the same keys as in $diffinfo)
3295 sub is_patch_split {
3296         my ($diffinfo, $patchinfo) = @_;
3297
3298         return defined $diffinfo && defined $patchinfo
3299                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3300 }
3301
3302
3303 sub git_difftree_body {
3304         my ($difftree, $hash, @parents) = @_;
3305         my ($parent) = $parents[0];
3306         my ($have_blame) = gitweb_check_feature('blame');
3307         print "<div class=\"list_head\">\n";
3308         if ($#{$difftree} > 10) {
3309                 print(($#{$difftree} + 1) . " files changed:\n");
3310         }
3311         print "</div>\n";
3312
3313         print "<table class=\"" .
3314               (@parents > 1 ? "combined " : "") .
3315               "diff_tree\">\n";
3316
3317         # header only for combined diff in 'commitdiff' view
3318         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3319         if ($has_header) {
3320                 # table header
3321                 print "<thead><tr>\n" .
3322                        "<th></th><th></th>\n"; # filename, patchN link
3323                 for (my $i = 0; $i < @parents; $i++) {
3324                         my $par = $parents[$i];
3325                         print "<th>" .
3326                               $cgi->a({-href => href(action=>"commitdiff",
3327                                                      hash=>$hash, hash_parent=>$par),
3328                                        -title => 'commitdiff to parent number ' .
3329                                                   ($i+1) . ': ' . substr($par,0,7)},
3330                                       $i+1) .
3331                               "&nbsp;</th>\n";
3332                 }
3333                 print "</tr></thead>\n<tbody>\n";
3334         }
3335
3336         my $alternate = 1;
3337         my $patchno = 0;
3338         foreach my $line (@{$difftree}) {
3339                 my $diff = parsed_difftree_line($line);
3340
3341                 if ($alternate) {
3342                         print "<tr class=\"dark\">\n";
3343                 } else {
3344                         print "<tr class=\"light\">\n";
3345                 }
3346                 $alternate ^= 1;
3347
3348                 if (exists $diff->{'nparents'}) { # combined diff
3349
3350                         fill_from_file_info($diff, @parents)
3351                                 unless exists $diff->{'from_file'};
3352
3353                         if (!is_deleted($diff)) {
3354                                 # file exists in the result (child) commit
3355                                 print "<td>" .
3356                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3357                                                              file_name=>$diff->{'to_file'},
3358                                                              hash_base=>$hash),
3359                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3360                                       "</td>\n";
3361                         } else {
3362                                 print "<td>" .
3363                                       esc_path($diff->{'to_file'}) .
3364                                       "</td>\n";
3365                         }
3366
3367                         if ($action eq 'commitdiff') {
3368                                 # link to patch
3369                                 $patchno++;
3370                                 print "<td class=\"link\">" .
3371                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3372                                       " | " .
3373                                       "</td>\n";
3374                         }
3375
3376                         my $has_history = 0;
3377                         my $not_deleted = 0;
3378                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3379                                 my $hash_parent = $parents[$i];
3380                                 my $from_hash = $diff->{'from_id'}[$i];
3381                                 my $from_path = $diff->{'from_file'}[$i];
3382                                 my $status = $diff->{'status'}[$i];
3383
3384                                 $has_history ||= ($status ne 'A');
3385                                 $not_deleted ||= ($status ne 'D');
3386
3387                                 if ($status eq 'A') {
3388                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3389                                 } elsif ($status eq 'D') {
3390                                         print "<td class=\"link\">" .
3391                                               $cgi->a({-href => href(action=>"blob",
3392                                                                      hash_base=>$hash,
3393                                                                      hash=>$from_hash,
3394                                                                      file_name=>$from_path)},
3395                                                       "blob" . ($i+1)) .
3396                                               " | </td>\n";
3397                                 } else {
3398                                         if ($diff->{'to_id'} eq $from_hash) {
3399                                                 print "<td class=\"link nochange\">";
3400                                         } else {
3401                                                 print "<td class=\"link\">";
3402                                         }
3403                                         print $cgi->a({-href => href(action=>"blobdiff",
3404                                                                      hash=>$diff->{'to_id'},
3405                                                                      hash_parent=>$from_hash,
3406                                                                      hash_base=>$hash,
3407                                                                      hash_parent_base=>$hash_parent,
3408                                                                      file_name=>$diff->{'to_file'},
3409                                                                      file_parent=>$from_path)},
3410                                                       "diff" . ($i+1)) .
3411                                               " | </td>\n";
3412                                 }
3413                         }
3414
3415                         print "<td class=\"link\">";
3416                         if ($not_deleted) {
3417                                 print $cgi->a({-href => href(action=>"blob",
3418                                                              hash=>$diff->{'to_id'},
3419                                                              file_name=>$diff->{'to_file'},
3420                                                              hash_base=>$hash)},
3421                                               "blob");
3422                                 print " | " if ($has_history);
3423                         }
3424                         if ($has_history) {
3425                                 print $cgi->a({-href => href(action=>"history",
3426                                                              file_name=>$diff->{'to_file'},
3427                                                              hash_base=>$hash)},
3428                                               "history");
3429                         }
3430                         print "</td>\n";
3431
3432                         print "</tr>\n";
3433                         next; # instead of 'else' clause, to avoid extra indent
3434                 }
3435                 # else ordinary diff
3436
3437                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3438                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3439                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3440                         $to_mode_oct = oct $diff->{'to_mode'};
3441                         if (S_ISREG($to_mode_oct)) { # only for regular file
3442                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3443                         }
3444                         $to_file_type = file_type($diff->{'to_mode'});
3445                 }
3446                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3447                         $from_mode_oct = oct $diff->{'from_mode'};
3448                         if (S_ISREG($to_mode_oct)) { # only for regular file
3449                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3450                         }
3451                         $from_file_type = file_type($diff->{'from_mode'});
3452                 }
3453
3454                 if ($diff->{'status'} eq "A") { # created
3455                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3456                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3457                         $mode_chng   .= "]</span>";
3458                         print "<td>";
3459                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3460                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3461                                       -class => "list"}, esc_path($diff->{'file'}));
3462                         print "</td>\n";
3463                         print "<td>$mode_chng</td>\n";
3464                         print "<td class=\"link\">";
3465                         if ($action eq 'commitdiff') {
3466                                 # link to patch
3467                                 $patchno++;
3468                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3469                                 print " | ";
3470                         }
3471                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3472                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3473                                       "blob");
3474                         print "</td>\n";
3475
3476                 } elsif ($diff->{'status'} eq "D") { # deleted
3477                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3478                         print "<td>";
3479                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3480                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3481                                        -class => "list"}, esc_path($diff->{'file'}));
3482                         print "</td>\n";
3483                         print "<td>$mode_chng</td>\n";
3484                         print "<td class=\"link\">";
3485                         if ($action eq 'commitdiff') {
3486                                 # link to patch
3487                                 $patchno++;
3488                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3489                                 print " | ";
3490                         }
3491                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3492                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3493                                       "blob") . " | ";
3494                         if ($have_blame) {
3495                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3496                                                              file_name=>$diff->{'file'})},
3497                                               "blame") . " | ";
3498                         }
3499                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3500                                                      file_name=>$diff->{'file'})},
3501                                       "history");
3502                         print "</td>\n";
3503
3504                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3505                         my $mode_chnge = "";
3506                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3507                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3508                                 if ($from_file_type ne $to_file_type) {
3509                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3510                                 }
3511                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3512                                         if ($from_mode_str && $to_mode_str) {
3513                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3514                                         } elsif ($to_mode_str) {
3515                                                 $mode_chnge .= " mode: $to_mode_str";
3516                                         }
3517                                 }
3518                                 $mode_chnge .= "]</span>\n";
3519                         }
3520                         print "<td>";
3521                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3522                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3523                                       -class => "list"}, esc_path($diff->{'file'}));
3524                         print "</td>\n";
3525                         print "<td>$mode_chnge</td>\n";
3526                         print "<td class=\"link\">";
3527                         if ($action eq 'commitdiff') {
3528                                 # link to patch
3529                                 $patchno++;
3530                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3531                                       " | ";
3532                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3533                                 # "commit" view and modified file (not onlu mode changed)
3534                                 print $cgi->a({-href => href(action=>"blobdiff",
3535                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3536                                                              hash_base=>$hash, hash_parent_base=>$parent,
3537                                                              file_name=>$diff->{'file'})},
3538                                               "diff") .
3539                                       " | ";
3540                         }
3541                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3542                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3543                                        "blob") . " | ";
3544                         if ($have_blame) {
3545                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3546                                                              file_name=>$diff->{'file'})},
3547                                               "blame") . " | ";
3548                         }
3549                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3550                                                      file_name=>$diff->{'file'})},
3551                                       "history");
3552                         print "</td>\n";
3553
3554                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3555                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3556                         my $nstatus = $status_name{$diff->{'status'}};
3557                         my $mode_chng = "";
3558                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3559                                 # mode also for directories, so we cannot use $to_mode_str
3560                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3561                         }
3562                         print "<td>" .
3563                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3564                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3565                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3566                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3567                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3568                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3569                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3570                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3571                               "<td class=\"link\">";
3572                         if ($action eq 'commitdiff') {
3573                                 # link to patch
3574                                 $patchno++;
3575                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3576                                       " | ";
3577                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3578                                 # "commit" view and modified file (not only pure rename or copy)
3579                                 print $cgi->a({-href => href(action=>"blobdiff",
3580                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3581                                                              hash_base=>$hash, hash_parent_base=>$parent,
3582                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3583                                               "diff") .
3584                                       " | ";
3585                         }
3586                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3587                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3588                                       "blob") . " | ";
3589                         if ($have_blame) {
3590                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3591                                                              file_name=>$diff->{'to_file'})},
3592                                               "blame") . " | ";
3593                         }
3594                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3595                                                     file_name=>$diff->{'to_file'})},
3596                                       "history");
3597                         print "</td>\n";
3598
3599                 } # we should not encounter Unmerged (U) or Unknown (X) status
3600                 print "</tr>\n";
3601         }
3602         print "</tbody>" if $has_header;
3603         print "</table>\n";
3604 }
3605
3606 sub git_patchset_body {
3607         my ($fd, $difftree, $hash, @hash_parents) = @_;
3608         my ($hash_parent) = $hash_parents[0];
3609
3610         my $is_combined = (@hash_parents > 1);
3611         my $patch_idx = 0;
3612         my $patch_number = 0;
3613         my $patch_line;
3614         my $diffinfo;
3615         my $to_name;
3616         my (%from, %to);
3617
3618         print "<div class=\"patchset\">\n";
3619
3620         # skip to first patch
3621         while ($patch_line = <$fd>) {
3622                 chomp $patch_line;
3623
3624                 last if ($patch_line =~ m/^diff /);
3625         }
3626
3627  PATCH:
3628         while ($patch_line) {
3629
3630                 # parse "git diff" header line
3631                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3632                         # $1 is from_name, which we do not use
3633                         $to_name = unquote($2);
3634                         $to_name =~ s!^b/!!;
3635                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3636                         # $1 is 'cc' or 'combined', which we do not use
3637                         $to_name = unquote($2);
3638                 } else {
3639                         $to_name = undef;
3640                 }
3641
3642                 # check if current patch belong to current raw line
3643                 # and parse raw git-diff line if needed
3644                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3645                         # this is continuation of a split patch
3646                         print "<div class=\"patch cont\">\n";
3647                 } else {
3648                         # advance raw git-diff output if needed
3649                         $patch_idx++ if defined $diffinfo;
3650
3651                         # read and prepare patch information
3652                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3653
3654                         # compact combined diff output can have some patches skipped
3655                         # find which patch (using pathname of result) we are at now;
3656                         if ($is_combined) {
3657                                 while ($to_name ne $diffinfo->{'to_file'}) {
3658                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3659                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3660                                               "</div>\n";  # class="patch"
3661
3662                                         $patch_idx++;
3663                                         $patch_number++;
3664
3665                                         last if $patch_idx > $#$difftree;
3666                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3667                                 }
3668                         }
3669
3670                         # modifies %from, %to hashes
3671                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3672
3673                         # this is first patch for raw difftree line with $patch_idx index
3674                         # we index @$difftree array from 0, but number patches from 1
3675                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3676                 }
3677
3678                 # git diff header
3679                 #assert($patch_line =~ m/^diff /) if DEBUG;
3680                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3681                 $patch_number++;
3682                 # print "git diff" header
3683                 print format_git_diff_header_line($patch_line, $diffinfo,
3684                                                   \%from, \%to);
3685
3686                 # print extended diff header
3687                 print "<div class=\"diff extended_header\">\n";
3688         EXTENDED_HEADER:
3689                 while ($patch_line = <$fd>) {
3690                         chomp $patch_line;
3691
3692                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3693
3694                         print format_extended_diff_header_line($patch_line, $diffinfo,
3695                                                                \%from, \%to);
3696                 }
3697                 print "</div>\n"; # class="diff extended_header"
3698
3699                 # from-file/to-file diff header
3700                 if (! $patch_line) {
3701                         print "</div>\n"; # class="patch"
3702                         last PATCH;
3703                 }
3704                 next PATCH if ($patch_line =~ m/^diff /);
3705                 #assert($patch_line =~ m/^---/) if DEBUG;
3706
3707                 my $last_patch_line = $patch_line;
3708                 $patch_line = <$fd>;
3709                 chomp $patch_line;
3710                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3711
3712                 print format_diff_from_to_header($last_patch_line, $patch_line,
3713                                                  $diffinfo, \%from, \%to,
3714                                                  @hash_parents);
3715
3716                 # the patch itself
3717         LINE:
3718                 while ($patch_line = <$fd>) {
3719                         chomp $patch_line;
3720
3721                         next PATCH if ($patch_line =~ m/^diff /);
3722
3723                         print format_diff_line($patch_line, \%from, \%to);
3724                 }
3725
3726         } continue {
3727                 print "</div>\n"; # class="patch"
3728         }
3729
3730         # for compact combined (--cc) format, with chunk and patch simpliciaction
3731         # patchset might be empty, but there might be unprocessed raw lines
3732         for (++$patch_idx if $patch_number > 0;
3733              $patch_idx < @$difftree;
3734              ++$patch_idx) {
3735                 # read and prepare patch information
3736                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3737
3738                 # generate anchor for "patch" links in difftree / whatchanged part
3739                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3740                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3741                       "</div>\n";  # class="patch"
3742
3743                 $patch_number++;
3744         }
3745
3746         if ($patch_number == 0) {
3747                 if (@hash_parents > 1) {
3748                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3749                 } else {
3750                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3751                 }
3752         }
3753
3754         print "</div>\n"; # class="patchset"
3755 }
3756
3757 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3758
3759 # fills project list info (age, description, owner, forks) for each
3760 # project in the list, removing invalid projects from returned list
3761 # NOTE: modifies $projlist, but does not remove entries from it
3762 sub fill_project_list_info {
3763         my ($projlist, $check_forks) = @_;
3764         my @projects;
3765
3766         my $show_ctags = gitweb_check_feature('ctags');
3767  PROJECT:
3768         foreach my $pr (@$projlist) {
3769                 my (@activity) = git_get_last_activity($pr->{'path'});
3770                 unless (@activity) {
3771                         next PROJECT;
3772                 }
3773                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3774                 if (!defined $pr->{'descr'}) {
3775                         my $descr = git_get_project_description($pr->{'path'}) || "";
3776                         $descr = to_utf8($descr);
3777                         $pr->{'descr_long'} = $descr;
3778                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3779                 }
3780                 if (!defined $pr->{'owner'}) {
3781                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3782                 }
3783                 if ($check_forks) {
3784                         my $pname = $pr->{'path'};
3785                         if (($pname =~ s/\.git$//) &&
3786                             ($pname !~ /\/$/) &&
3787                             (-d "$projectroot/$pname")) {
3788                                 $pr->{'forks'} = "-d $projectroot/$pname";
3789                         }       else {
3790                                 $pr->{'forks'} = 0;
3791                         }
3792                 }
3793                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3794                 push @projects, $pr;
3795         }
3796
3797         return @projects;
3798 }
3799
3800 # print 'sort by' <th> element, generating 'sort by $name' replay link
3801 # if that order is not selected
3802 sub print_sort_th {
3803         my ($name, $order, $header) = @_;
3804         $header ||= ucfirst($name);
3805
3806         if ($order eq $name) {
3807                 print "<th>$header</th>\n";
3808         } else {
3809                 print "<th>" .
3810                       $cgi->a({-href => href(-replay=>1, order=>$name),
3811                                -class => "header"}, $header) .
3812                       "</th>\n";
3813         }
3814 }
3815
3816 sub git_project_list_body {
3817         # actually uses global variable $project
3818         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3819
3820         my ($check_forks) = gitweb_check_feature('forks');
3821         my @projects = fill_project_list_info($projlist, $check_forks);
3822
3823         $order ||= $default_projects_order;
3824         $from = 0 unless defined $from;
3825         $to = $#projects if (!defined $to || $#projects < $to);
3826
3827         my %order_info = (
3828                 project => { key => 'path', type => 'str' },
3829                 descr => { key => 'descr_long', type => 'str' },
3830                 owner => { key => 'owner', type => 'str' },
3831                 age => { key => 'age', type => 'num' }
3832         );
3833         my $oi = $order_info{$order};
3834         if ($oi->{'type'} eq 'str') {
3835                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
3836         } else {
3837                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
3838         }
3839
3840         my $show_ctags = gitweb_check_feature('ctags');
3841         if ($show_ctags) {
3842                 my %ctags;
3843                 foreach my $p (@projects) {
3844                         foreach my $ct (keys %{$p->{'ctags'}}) {
3845                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
3846                         }
3847                 }
3848                 my $cloud = git_populate_project_tagcloud(\%ctags);
3849                 print git_show_project_tagcloud($cloud, 64);
3850         }
3851
3852         print "<table class=\"project_list\">\n";
3853         unless ($no_header) {
3854                 print "<tr>\n";
3855                 if ($check_forks) {
3856                         print "<th></th>\n";
3857                 }
3858                 print_sort_th('project', $order, 'Project');
3859                 print_sort_th('descr', $order, 'Description');
3860                 print_sort_th('owner', $order, 'Owner');
3861                 print_sort_th('age', $order, 'Last Change');
3862                 print "<th></th>\n" . # for links
3863                       "</tr>\n";
3864         }
3865         my $alternate = 1;
3866         my $tagfilter = $cgi->param('by_tag');
3867         for (my $i = $from; $i <= $to; $i++) {
3868                 my $pr = $projects[$i];
3869
3870                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
3871                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
3872                         and not $pr->{'descr_long'} =~ /$searchtext/;
3873                 # Weed out forks or non-matching entries of search
3874                 if ($check_forks) {
3875                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
3876                         $forkbase="^$forkbase" if $forkbase;
3877                         next if not $searchtext and not $tagfilter and $show_ctags
3878                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
3879                 }
3880
3881                 if ($alternate) {
3882                         print "<tr class=\"dark\">\n";
3883                 } else {
3884                         print "<tr class=\"light\">\n";
3885                 }
3886                 $alternate ^= 1;
3887                 if ($check_forks) {
3888                         print "<td>";
3889                         if ($pr->{'forks'}) {
3890                                 print "<!-- $pr->{'forks'} -->\n";
3891                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
3892                         }
3893                         print "</td>\n";
3894                 }
3895                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3896                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
3897                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
3898                                         -class => "list", -title => $pr->{'descr_long'}},
3899                                         esc_html($pr->{'descr'})) . "</td>\n" .
3900                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
3901                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
3902                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
3903                       "<td class=\"link\">" .
3904                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
3905                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
3906                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
3907                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
3908                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
3909                       "</td>\n" .
3910                       "</tr>\n";
3911         }
3912         if (defined $extra) {
3913                 print "<tr>\n";
3914                 if ($check_forks) {
3915                         print "<td></td>\n";
3916                 }
3917                 print "<td colspan=\"5\">$extra</td>\n" .
3918                       "</tr>\n";
3919         }
3920         print "</table>\n";
3921 }
3922
3923 sub git_shortlog_body {
3924         # uses global variable $project
3925         my ($commitlist, $from, $to, $refs, $extra) = @_;
3926
3927         $from = 0 unless defined $from;
3928         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
3929
3930         print "<table class=\"shortlog\">\n";
3931         my $alternate = 1;
3932         for (my $i = $from; $i <= $to; $i++) {
3933                 my %co = %{$commitlist->[$i]};
3934                 my $commit = $co{'id'};
3935                 my $ref = format_ref_marker($refs, $commit);
3936                 if ($alternate) {
3937                         print "<tr class=\"dark\">\n";
3938                 } else {
3939                         print "<tr class=\"light\">\n";
3940                 }
3941                 $alternate ^= 1;
3942                 my $author = chop_and_escape_str($co{'author_name'}, 10);
3943                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
3944                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3945                       "<td><i>" . $author . "</i></td>\n" .
3946                       "<td>";
3947                 print format_subject_html($co{'title'}, $co{'title_short'},
3948                                           href(action=>"commit", hash=>$commit), $ref);
3949                 print "</td>\n" .
3950                       "<td class=\"link\">" .
3951                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
3952                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
3953                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
3954                 my $snapshot_links = format_snapshot_links($commit);
3955                 if (defined $snapshot_links) {
3956                         print " | " . $snapshot_links;
3957                 }
3958                 print "</td>\n" .
3959                       "</tr>\n";
3960         }
3961         if (defined $extra) {
3962                 print "<tr>\n" .
3963                       "<td colspan=\"4\">$extra</td>\n" .
3964                       "</tr>\n";
3965         }
3966         print "</table>\n";
3967 }
3968
3969 sub git_history_body {
3970         # Warning: assumes constant type (blob or tree) during history
3971         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
3972
3973         $from = 0 unless defined $from;
3974         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
3975
3976         print "<table class=\"history\">\n";
3977         my $alternate = 1;
3978         for (my $i = $from; $i <= $to; $i++) {
3979                 my %co = %{$commitlist->[$i]};
3980                 if (!%co) {
3981                         next;
3982                 }
3983                 my $commit = $co{'id'};
3984
3985                 my $ref = format_ref_marker($refs, $commit);
3986
3987                 if ($alternate) {
3988                         print "<tr class=\"dark\">\n";
3989                 } else {
3990                         print "<tr class=\"light\">\n";
3991                 }
3992                 $alternate ^= 1;
3993         # shortlog uses      chop_str($co{'author_name'}, 10)
3994                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
3995                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
3996                       "<td><i>" . $author . "</i></td>\n" .
3997                       "<td>";
3998                 # originally git_history used chop_str($co{'title'}, 50)
3999                 print format_subject_html($co{'title'}, $co{'title_short'},
4000                                           href(action=>"commit", hash=>$commit), $ref);
4001                 print "</td>\n" .
4002                       "<td class=\"link\">" .
4003                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4004                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4005
4006                 if ($ftype eq 'blob') {
4007                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4008                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4009                         if (defined $blob_current && defined $blob_parent &&
4010                                         $blob_current ne $blob_parent) {
4011                                 print " | " .
4012                                         $cgi->a({-href => href(action=>"blobdiff",
4013                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4014                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4015                                                                file_name=>$file_name)},
4016                                                 "diff to current");
4017                         }
4018                 }
4019                 print "</td>\n" .
4020                       "</tr>\n";
4021         }
4022         if (defined $extra) {
4023                 print "<tr>\n" .
4024                       "<td colspan=\"4\">$extra</td>\n" .
4025                       "</tr>\n";
4026         }
4027         print "</table>\n";
4028 }
4029
4030 sub git_tags_body {
4031         # uses global variable $project
4032         my ($taglist, $from, $to, $extra) = @_;
4033         $from = 0 unless defined $from;
4034         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4035
4036         print "<table class=\"tags\">\n";
4037         my $alternate = 1;
4038         for (my $i = $from; $i <= $to; $i++) {
4039                 my $entry = $taglist->[$i];
4040                 my %tag = %$entry;
4041                 my $comment = $tag{'subject'};
4042                 my $comment_short;
4043                 if (defined $comment) {
4044                         $comment_short = chop_str($comment, 30, 5);
4045                 }
4046                 if ($alternate) {
4047                         print "<tr class=\"dark\">\n";
4048                 } else {
4049                         print "<tr class=\"light\">\n";
4050                 }
4051                 $alternate ^= 1;
4052                 if (defined $tag{'age'}) {
4053                         print "<td><i>$tag{'age'}</i></td>\n";
4054                 } else {
4055                         print "<td></td>\n";
4056                 }
4057                 print "<td>" .
4058                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4059                                -class => "list name"}, esc_html($tag{'name'})) .
4060                       "</td>\n" .
4061                       "<td>";
4062                 if (defined $comment) {
4063                         print format_subject_html($comment, $comment_short,
4064                                                   href(action=>"tag", hash=>$tag{'id'}));
4065                 }
4066                 print "</td>\n" .
4067                       "<td class=\"selflink\">";
4068                 if ($tag{'type'} eq "tag") {
4069                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4070                 } else {
4071                         print "&nbsp;";
4072                 }
4073                 print "</td>\n" .
4074                       "<td class=\"link\">" . " | " .
4075                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4076                 if ($tag{'reftype'} eq "commit") {
4077                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4078                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4079                 } elsif ($tag{'reftype'} eq "blob") {
4080                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4081                 }
4082                 print "</td>\n" .
4083                       "</tr>";
4084         }
4085         if (defined $extra) {
4086                 print "<tr>\n" .
4087                       "<td colspan=\"5\">$extra</td>\n" .
4088                       "</tr>\n";
4089         }
4090         print "</table>\n";
4091 }
4092
4093 sub git_heads_body {
4094         # uses global variable $project
4095         my ($headlist, $head, $from, $to, $extra) = @_;
4096         $from = 0 unless defined $from;
4097         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4098
4099         print "<table class=\"heads\">\n";
4100         my $alternate = 1;
4101         for (my $i = $from; $i <= $to; $i++) {
4102                 my $entry = $headlist->[$i];
4103                 my %ref = %$entry;
4104                 my $curr = $ref{'id'} eq $head;
4105                 if ($alternate) {
4106                         print "<tr class=\"dark\">\n";
4107                 } else {
4108                         print "<tr class=\"light\">\n";
4109                 }
4110                 $alternate ^= 1;
4111                 print "<td><i>$ref{'age'}</i></td>\n" .
4112                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4113                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4114                                -class => "list name"},esc_html($ref{'name'})) .
4115                       "</td>\n" .
4116                       "<td class=\"link\">" .
4117                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4118                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4119                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4120                       "</td>\n" .
4121                       "</tr>";
4122         }
4123         if (defined $extra) {
4124                 print "<tr>\n" .
4125                       "<td colspan=\"3\">$extra</td>\n" .
4126                       "</tr>\n";
4127         }
4128         print "</table>\n";
4129 }
4130
4131 sub git_search_grep_body {
4132         my ($commitlist, $from, $to, $extra) = @_;
4133         $from = 0 unless defined $from;
4134         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4135
4136         print "<table class=\"commit_search\">\n";
4137         my $alternate = 1;
4138         for (my $i = $from; $i <= $to; $i++) {
4139                 my %co = %{$commitlist->[$i]};
4140                 if (!%co) {
4141                         next;
4142                 }
4143                 my $commit = $co{'id'};
4144                 if ($alternate) {
4145                         print "<tr class=\"dark\">\n";
4146                 } else {
4147                         print "<tr class=\"light\">\n";
4148                 }
4149                 $alternate ^= 1;
4150                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4151                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4152                       "<td><i>" . $author . "</i></td>\n" .
4153                       "<td>" .
4154                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4155                                -class => "list subject"},
4156                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4157                 my $comment = $co{'comment'};
4158                 foreach my $line (@$comment) {
4159                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4160                                 my ($lead, $match, $trail) = ($1, $2, $3);
4161                                 $match = chop_str($match, 70, 5, 'center');
4162                                 my $contextlen = int((80 - length($match))/2);
4163                                 $contextlen = 30 if ($contextlen > 30);
4164                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4165                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4166
4167                                 $lead  = esc_html($lead);
4168                                 $match = esc_html($match);
4169                                 $trail = esc_html($trail);
4170
4171                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4172                         }
4173                 }
4174                 print "</td>\n" .
4175                       "<td class=\"link\">" .
4176                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4177                       " | " .
4178                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4179                       " | " .
4180                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4181                 print "</td>\n" .
4182                       "</tr>\n";
4183         }
4184         if (defined $extra) {
4185                 print "<tr>\n" .
4186                       "<td colspan=\"3\">$extra</td>\n" .
4187                       "</tr>\n";
4188         }
4189         print "</table>\n";
4190 }
4191
4192 ## ======================================================================
4193 ## ======================================================================
4194 ## actions
4195
4196 sub git_project_list {
4197         my $order = $input_params{'order'};
4198         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4199                 die_error(400, "Unknown order parameter");
4200         }
4201
4202         my @list = git_get_projects_list();
4203         if (!@list) {
4204                 die_error(404, "No projects found");
4205         }
4206
4207         git_header_html();
4208         if (-f $home_text) {
4209                 print "<div class=\"index_include\">\n";
4210                 open (my $fd, $home_text);
4211                 print <$fd>;
4212                 close $fd;
4213                 print "</div>\n";
4214         }
4215         print $cgi->startform(-method => "get") .
4216               "<p class=\"projsearch\">Search:\n" .
4217               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4218               "</p>" .
4219               $cgi->end_form() . "\n";
4220         git_project_list_body(\@list, $order);
4221         git_footer_html();
4222 }
4223
4224 sub git_forks {
4225         my $order = $input_params{'order'};
4226         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4227                 die_error(400, "Unknown order parameter");
4228         }
4229
4230         my @list = git_get_projects_list($project);
4231         if (!@list) {
4232                 die_error(404, "No forks found");
4233         }
4234
4235         git_header_html();
4236         git_print_page_nav('','');
4237         git_print_header_div('summary', "$project forks");
4238         git_project_list_body(\@list, $order);
4239         git_footer_html();
4240 }
4241
4242 sub git_project_index {
4243         my @projects = git_get_projects_list($project);
4244
4245         print $cgi->header(
4246                 -type => 'text/plain',
4247                 -charset => 'utf-8',
4248                 -content_disposition => 'inline; filename="index.aux"');
4249
4250         foreach my $pr (@projects) {
4251                 if (!exists $pr->{'owner'}) {
4252                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4253                 }
4254
4255                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4256                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4257                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4258                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4259                 $path  =~ s/ /\+/g;
4260                 $owner =~ s/ /\+/g;
4261
4262                 print "$path $owner\n";
4263         }
4264 }
4265
4266 sub git_summary {
4267         my $descr = git_get_project_description($project) || "none";
4268         my %co = parse_commit("HEAD");
4269         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4270         my $head = $co{'id'};
4271
4272         my $owner = git_get_project_owner($project);
4273
4274         my $refs = git_get_references();
4275         # These get_*_list functions return one more to allow us to see if
4276         # there are more ...
4277         my @taglist  = git_get_tags_list(16);
4278         my @headlist = git_get_heads_list(16);
4279         my @forklist;
4280         my ($check_forks) = gitweb_check_feature('forks');
4281
4282         if ($check_forks) {
4283                 @forklist = git_get_projects_list($project);
4284         }
4285
4286         git_header_html();
4287         git_print_page_nav('summary','', $head);
4288
4289         print "<div class=\"title\">&nbsp;</div>\n";
4290         print "<table class=\"projects_list\">\n" .
4291               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4292               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4293         if (defined $cd{'rfc2822'}) {
4294                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4295         }
4296
4297         # use per project git URL list in $projectroot/$project/cloneurl
4298         # or make project git URL from git base URL and project name
4299         my $url_tag = "URL";
4300         my @url_list = git_get_project_url_list($project);
4301         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4302         foreach my $git_url (@url_list) {
4303                 next unless $git_url;
4304                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4305                 $url_tag = "";
4306         }
4307
4308         # Tag cloud
4309         my $show_ctags = (gitweb_check_feature('ctags'))[0];
4310         if ($show_ctags) {
4311                 my $ctags = git_get_project_ctags($project);
4312                 my $cloud = git_populate_project_tagcloud($ctags);
4313                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4314                 print "</td>\n<td>" unless %$ctags;
4315                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4316                 print "</td>\n<td>" if %$ctags;
4317                 print git_show_project_tagcloud($cloud, 48);
4318                 print "</td></tr>";
4319         }
4320
4321         print "</table>\n";
4322
4323         if (-s "$projectroot/$project/README.html") {
4324                 if (open my $fd, "$projectroot/$project/README.html") {
4325                         print "<div class=\"title\">readme</div>\n" .
4326                               "<div class=\"readme\">\n";
4327                         print $_ while (<$fd>);
4328                         print "\n</div>\n"; # class="readme"
4329                         close $fd;
4330                 }
4331         }
4332
4333         # we need to request one more than 16 (0..15) to check if
4334         # those 16 are all
4335         my @commitlist = $head ? parse_commits($head, 17) : ();
4336         if (@commitlist) {
4337                 git_print_header_div('shortlog');
4338                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4339                                   $#commitlist <=  15 ? undef :
4340                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4341         }
4342
4343         if (@taglist) {
4344                 git_print_header_div('tags');
4345                 git_tags_body(\@taglist, 0, 15,
4346                               $#taglist <=  15 ? undef :
4347                               $cgi->a({-href => href(action=>"tags")}, "..."));
4348         }
4349
4350         if (@headlist) {
4351                 git_print_header_div('heads');
4352                 git_heads_body(\@headlist, $head, 0, 15,
4353                                $#headlist <= 15 ? undef :
4354                                $cgi->a({-href => href(action=>"heads")}, "..."));
4355         }
4356
4357         if (@forklist) {
4358                 git_print_header_div('forks');
4359                 git_project_list_body(\@forklist, 'age', 0, 15,
4360                                       $#forklist <= 15 ? undef :
4361                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4362                                       'no_header');
4363         }
4364
4365         git_footer_html();
4366 }
4367
4368 sub git_tag {
4369         my $head = git_get_head_hash($project);
4370         git_header_html();
4371         git_print_page_nav('','', $head,undef,$head);
4372         my %tag = parse_tag($hash);
4373
4374         if (! %tag) {
4375                 die_error(404, "Unknown tag object");
4376         }
4377
4378         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4379         print "<div class=\"title_text\">\n" .
4380               "<table class=\"object_header\">\n" .
4381               "<tr>\n" .
4382               "<td>object</td>\n" .
4383               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4384                                $tag{'object'}) . "</td>\n" .
4385               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4386                                               $tag{'type'}) . "</td>\n" .
4387               "</tr>\n";
4388         if (defined($tag{'author'})) {
4389                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4390                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4391                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4392                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4393                         "</td></tr>\n";
4394         }
4395         print "</table>\n\n" .
4396               "</div>\n";
4397         print "<div class=\"page_body\">";
4398         my $comment = $tag{'comment'};
4399         foreach my $line (@$comment) {
4400                 chomp $line;
4401                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4402         }
4403         print "</div>\n";
4404         git_footer_html();
4405 }
4406
4407 sub git_blame {
4408         my $fd;
4409         my $ftype;
4410
4411         gitweb_check_feature('blame')
4412             or die_error(403, "Blame view not allowed");
4413
4414         die_error(400, "No file name given") unless $file_name;
4415         $hash_base ||= git_get_head_hash($project);
4416         die_error(404, "Couldn't find base commit") unless ($hash_base);
4417         my %co = parse_commit($hash_base)
4418                 or die_error(404, "Commit not found");
4419         if (!defined $hash) {
4420                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4421                         or die_error(404, "Error looking up file");
4422         }
4423         $ftype = git_get_type($hash);
4424         if ($ftype !~ "blob") {
4425                 die_error(400, "Object is not a blob");
4426         }
4427         open ($fd, "-|", git_cmd(), "blame", '-p', '--',
4428               $file_name, $hash_base)
4429                 or die_error(500, "Open git-blame failed");
4430         git_header_html();
4431         my $formats_nav =
4432                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4433                         "blob") .
4434                 " | " .
4435                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4436                         "history") .
4437                 " | " .
4438                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4439                         "HEAD");
4440         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4441         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4442         git_print_page_path($file_name, $ftype, $hash_base);
4443         my @rev_color = (qw(light2 dark2));
4444         my $num_colors = scalar(@rev_color);
4445         my $current_color = 0;
4446         my $last_rev;
4447         print <<HTML;
4448 <div class="page_body">
4449 <table class="blame">
4450 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4451 HTML
4452         my %metainfo = ();
4453         while (1) {
4454                 $_ = <$fd>;
4455                 last unless defined $_;
4456                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4457                     /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
4458                 if (!exists $metainfo{$full_rev}) {
4459                         $metainfo{$full_rev} = {};
4460                 }
4461                 my $meta = $metainfo{$full_rev};
4462                 while (<$fd>) {
4463                         last if (s/^\t//);
4464                         if (/^(\S+) (.*)$/) {
4465                                 $meta->{$1} = $2;
4466                         }
4467                 }
4468                 my $data = $_;
4469                 chomp $data;
4470                 my $rev = substr($full_rev, 0, 8);
4471                 my $author = $meta->{'author'};
4472                 my %date = parse_date($meta->{'author-time'},
4473                                       $meta->{'author-tz'});
4474                 my $date = $date{'iso-tz'};
4475                 if ($group_size) {
4476                         $current_color = ++$current_color % $num_colors;
4477                 }
4478                 print "<tr class=\"$rev_color[$current_color]\">\n";
4479                 if ($group_size) {
4480                         print "<td class=\"sha1\"";
4481                         print " title=\"". esc_html($author) . ", $date\"";
4482                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4483                         print ">";
4484                         print $cgi->a({-href => href(action=>"commit",
4485                                                      hash=>$full_rev,
4486                                                      file_name=>$file_name)},
4487                                       esc_html($rev));
4488                         print "</td>\n";
4489                 }
4490                 open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4491                         or die_error(500, "Open git-rev-parse failed");
4492                 my $parent_commit = <$dd>;
4493                 close $dd;
4494                 chomp($parent_commit);
4495                 my $blamed = href(action => 'blame',
4496                                   file_name => $meta->{'filename'},
4497                                   hash_base => $parent_commit);
4498                 print "<td class=\"linenr\">";
4499                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4500                                 -id => "l$lineno",
4501                                 -class => "linenr" },
4502                               esc_html($lineno));
4503                 print "</td>";
4504                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4505                 print "</tr>\n";
4506         }
4507         print "</table>\n";
4508         print "</div>";
4509         close $fd
4510                 or print "Reading blob failed\n";
4511         git_footer_html();
4512 }
4513
4514 sub git_tags {
4515         my $head = git_get_head_hash($project);
4516         git_header_html();
4517         git_print_page_nav('','', $head,undef,$head);
4518         git_print_header_div('summary', $project);
4519
4520         my @tagslist = git_get_tags_list();
4521         if (@tagslist) {
4522                 git_tags_body(\@tagslist);
4523         }
4524         git_footer_html();
4525 }
4526
4527 sub git_heads {
4528         my $head = git_get_head_hash($project);
4529         git_header_html();
4530         git_print_page_nav('','', $head,undef,$head);
4531         git_print_header_div('summary', $project);
4532
4533         my @headslist = git_get_heads_list();
4534         if (@headslist) {
4535                 git_heads_body(\@headslist, $head);
4536         }
4537         git_footer_html();
4538 }
4539
4540 sub git_blob_plain {
4541         my $type = shift;
4542         my $expires;
4543
4544         if (!defined $hash) {
4545                 if (defined $file_name) {
4546                         my $base = $hash_base || git_get_head_hash($project);
4547                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4548                                 or die_error(404, "Cannot find file");
4549                 } else {
4550                         die_error(400, "No file name defined");
4551                 }
4552         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4553                 # blobs defined by non-textual hash id's can be cached
4554                 $expires = "+1d";
4555         }
4556
4557         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4558                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4559
4560         # content-type (can include charset)
4561         $type = blob_contenttype($fd, $file_name, $type);
4562
4563         # "save as" filename, even when no $file_name is given
4564         my $save_as = "$hash";
4565         if (defined $file_name) {
4566                 $save_as = $file_name;
4567         } elsif ($type =~ m/^text\//) {
4568                 $save_as .= '.txt';
4569         }
4570
4571         print $cgi->header(
4572                 -type => $type,
4573                 -expires => $expires,
4574                 -content_disposition => 'inline; filename="' . $save_as . '"');
4575         undef $/;
4576         binmode STDOUT, ':raw';
4577         print <$fd>;
4578         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4579         $/ = "\n";
4580         close $fd;
4581 }
4582
4583 sub git_blob {
4584         my $expires;
4585
4586         if (!defined $hash) {
4587                 if (defined $file_name) {
4588                         my $base = $hash_base || git_get_head_hash($project);
4589                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4590                                 or die_error(404, "Cannot find file");
4591                 } else {
4592                         die_error(400, "No file name defined");
4593                 }
4594         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4595                 # blobs defined by non-textual hash id's can be cached
4596                 $expires = "+1d";
4597         }
4598
4599         my ($have_blame) = gitweb_check_feature('blame');
4600         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4601                 or die_error(500, "Couldn't cat $file_name, $hash");
4602         my $mimetype = blob_mimetype($fd, $file_name);
4603         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4604                 close $fd;
4605                 return git_blob_plain($mimetype);
4606         }
4607         # we can have blame only for text/* mimetype
4608         $have_blame &&= ($mimetype =~ m!^text/!);
4609
4610         git_header_html(undef, $expires);
4611         my $formats_nav = '';
4612         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4613                 if (defined $file_name) {
4614                         if ($have_blame) {
4615                                 $formats_nav .=
4616                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4617                                                 "blame") .
4618                                         " | ";
4619                         }
4620                         $formats_nav .=
4621                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4622                                         "history") .
4623                                 " | " .
4624                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4625                                         "raw") .
4626                                 " | " .
4627                                 $cgi->a({-href => href(action=>"blob",
4628                                                        hash_base=>"HEAD", file_name=>$file_name)},
4629                                         "HEAD");
4630                 } else {
4631                         $formats_nav .=
4632                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4633                                         "raw");
4634                 }
4635                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4636                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4637         } else {
4638                 print "<div class=\"page_nav\">\n" .
4639                       "<br/><br/></div>\n" .
4640                       "<div class=\"title\">$hash</div>\n";
4641         }
4642         git_print_page_path($file_name, "blob", $hash_base);
4643         print "<div class=\"page_body\">\n";
4644         if ($mimetype =~ m!^image/!) {
4645                 print qq!<img type="$mimetype"!;
4646                 if ($file_name) {
4647                         print qq! alt="$file_name" title="$file_name"!;
4648                 }
4649                 print qq! src="! .
4650                       href(action=>"blob_plain", hash=>$hash,
4651                            hash_base=>$hash_base, file_name=>$file_name) .
4652                       qq!" />\n!;
4653         } else {
4654                 my $nr;
4655                 while (my $line = <$fd>) {
4656                         chomp $line;
4657                         $nr++;
4658                         $line = untabify($line);
4659                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4660                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4661                 }
4662         }
4663         close $fd
4664                 or print "Reading blob failed.\n";
4665         print "</div>";
4666         git_footer_html();
4667 }
4668
4669 sub git_tree {
4670         if (!defined $hash_base) {
4671                 $hash_base = "HEAD";
4672         }
4673         if (!defined $hash) {
4674                 if (defined $file_name) {
4675                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4676                 } else {
4677                         $hash = $hash_base;
4678                 }
4679         }
4680         die_error(404, "No such tree") unless defined($hash);
4681         $/ = "\0";
4682         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4683                 or die_error(500, "Open git-ls-tree failed");
4684         my @entries = map { chomp; $_ } <$fd>;
4685         close $fd or die_error(404, "Reading tree failed");
4686         $/ = "\n";
4687
4688         my $refs = git_get_references();
4689         my $ref = format_ref_marker($refs, $hash_base);
4690         git_header_html();
4691         my $basedir = '';
4692         my ($have_blame) = gitweb_check_feature('blame');
4693         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4694                 my @views_nav = ();
4695                 if (defined $file_name) {
4696                         push @views_nav,
4697                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4698                                         "history"),
4699                                 $cgi->a({-href => href(action=>"tree",
4700                                                        hash_base=>"HEAD", file_name=>$file_name)},
4701                                         "HEAD"),
4702                 }
4703                 my $snapshot_links = format_snapshot_links($hash);
4704                 if (defined $snapshot_links) {
4705                         # FIXME: Should be available when we have no hash base as well.
4706                         push @views_nav, $snapshot_links;
4707                 }
4708                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4709                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4710         } else {
4711                 undef $hash_base;
4712                 print "<div class=\"page_nav\">\n";
4713                 print "<br/><br/></div>\n";
4714                 print "<div class=\"title\">$hash</div>\n";
4715         }
4716         if (defined $file_name) {
4717                 $basedir = $file_name;
4718                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4719                         $basedir .= '/';
4720                 }
4721                 git_print_page_path($file_name, 'tree', $hash_base);
4722         }
4723         print "<div class=\"page_body\">\n";
4724         print "<table class=\"tree\">\n";
4725         my $alternate = 1;
4726         # '..' (top directory) link if possible
4727         if (defined $hash_base &&
4728             defined $file_name && $file_name =~ m![^/]+$!) {
4729                 if ($alternate) {
4730                         print "<tr class=\"dark\">\n";
4731                 } else {
4732                         print "<tr class=\"light\">\n";
4733                 }
4734                 $alternate ^= 1;
4735
4736                 my $up = $file_name;
4737                 $up =~ s!/?[^/]+$!!;
4738                 undef $up unless $up;
4739                 # based on git_print_tree_entry
4740                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4741                 print '<td class="list">';
4742                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4743                                              file_name=>$up)},
4744                               "..");
4745                 print "</td>\n";
4746                 print "<td class=\"link\"></td>\n";
4747
4748                 print "</tr>\n";
4749         }
4750         foreach my $line (@entries) {
4751                 my %t = parse_ls_tree_line($line, -z => 1);
4752
4753                 if ($alternate) {
4754                         print "<tr class=\"dark\">\n";
4755                 } else {
4756                         print "<tr class=\"light\">\n";
4757                 }
4758                 $alternate ^= 1;
4759
4760                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4761
4762                 print "</tr>\n";
4763         }
4764         print "</table>\n" .
4765               "</div>";
4766         git_footer_html();
4767 }
4768
4769 sub git_snapshot {
4770         my @supported_fmts = gitweb_check_feature('snapshot');
4771         @supported_fmts = filter_snapshot_fmts(@supported_fmts);
4772
4773         my $format = $input_params{'snapshot_format'};
4774         if (!@supported_fmts) {
4775                 die_error(403, "Snapshots not allowed");
4776         }
4777         # default to first supported snapshot format
4778         $format ||= $supported_fmts[0];
4779         if ($format !~ m/^[a-z0-9]+$/) {
4780                 die_error(400, "Invalid snapshot format parameter");
4781         } elsif (!exists($known_snapshot_formats{$format})) {
4782                 die_error(400, "Unknown snapshot format");
4783         } elsif (!grep($_ eq $format, @supported_fmts)) {
4784                 die_error(403, "Unsupported snapshot format");
4785         }
4786
4787         if (!defined $hash) {
4788                 $hash = git_get_head_hash($project);
4789         }
4790
4791         my $name = $project;
4792         $name =~ s,([^/])/*\.git$,$1,;
4793         $name = basename($name);
4794         my $filename = to_utf8($name);
4795         $name =~ s/\047/\047\\\047\047/g;
4796         my $cmd;
4797         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4798         $cmd = quote_command(
4799                 git_cmd(), 'archive',
4800                 "--format=$known_snapshot_formats{$format}{'format'}",
4801                 "--prefix=$name/", $hash);
4802         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4803                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4804         }
4805
4806         print $cgi->header(
4807                 -type => $known_snapshot_formats{$format}{'type'},
4808                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4809                 -status => '200 OK');
4810
4811         open my $fd, "-|", $cmd
4812                 or die_error(500, "Execute git-archive failed");
4813         binmode STDOUT, ':raw';
4814         print <$fd>;
4815         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4816         close $fd;
4817 }
4818
4819 sub git_log {
4820         my $head = git_get_head_hash($project);
4821         if (!defined $hash) {
4822                 $hash = $head;
4823         }
4824         if (!defined $page) {
4825                 $page = 0;
4826         }
4827         my $refs = git_get_references();
4828
4829         my @commitlist = parse_commits($hash, 101, (100 * $page));
4830
4831         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
4832
4833         git_header_html();
4834         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
4835
4836         if (!@commitlist) {
4837                 my %co = parse_commit($hash);
4838
4839                 git_print_header_div('summary', $project);
4840                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
4841         }
4842         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
4843         for (my $i = 0; $i <= $to; $i++) {
4844                 my %co = %{$commitlist[$i]};
4845                 next if !%co;
4846                 my $commit = $co{'id'};
4847                 my $ref = format_ref_marker($refs, $commit);
4848                 my %ad = parse_date($co{'author_epoch'});
4849                 git_print_header_div('commit',
4850                                "<span class=\"age\">$co{'age_string'}</span>" .
4851                                esc_html($co{'title'}) . $ref,
4852                                $commit);
4853                 print "<div class=\"title_text\">\n" .
4854                       "<div class=\"log_link\">\n" .
4855                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4856                       " | " .
4857                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4858                       " | " .
4859                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4860                       "<br/>\n" .
4861                       "</div>\n" .
4862                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
4863                       "</div>\n";
4864
4865                 print "<div class=\"log_body\">\n";
4866                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4867                 print "</div>\n";
4868         }
4869         if ($#commitlist >= 100) {
4870                 print "<div class=\"page_nav\">\n";
4871                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
4872                                -accesskey => "n", -title => "Alt-n"}, "next");
4873                 print "</div>\n";
4874         }
4875         git_footer_html();
4876 }
4877
4878 sub git_commit {
4879         $hash ||= $hash_base || "HEAD";
4880         my %co = parse_commit($hash)
4881             or die_error(404, "Unknown commit object");
4882         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
4883         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
4884
4885         my $parent  = $co{'parent'};
4886         my $parents = $co{'parents'}; # listref
4887
4888         # we need to prepare $formats_nav before any parameter munging
4889         my $formats_nav;
4890         if (!defined $parent) {
4891                 # --root commitdiff
4892                 $formats_nav .= '(initial)';
4893         } elsif (@$parents == 1) {
4894                 # single parent commit
4895                 $formats_nav .=
4896                         '(parent: ' .
4897                         $cgi->a({-href => href(action=>"commit",
4898                                                hash=>$parent)},
4899                                 esc_html(substr($parent, 0, 7))) .
4900                         ')';
4901         } else {
4902                 # merge commit
4903                 $formats_nav .=
4904                         '(merge: ' .
4905                         join(' ', map {
4906                                 $cgi->a({-href => href(action=>"commit",
4907                                                        hash=>$_)},
4908                                         esc_html(substr($_, 0, 7)));
4909                         } @$parents ) .
4910                         ')';
4911         }
4912
4913         if (!defined $parent) {
4914                 $parent = "--root";
4915         }
4916         my @difftree;
4917         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
4918                 @diff_opts,
4919                 (@$parents <= 1 ? $parent : '-c'),
4920                 $hash, "--"
4921                 or die_error(500, "Open git-diff-tree failed");
4922         @difftree = map { chomp; $_ } <$fd>;
4923         close $fd or die_error(404, "Reading git-diff-tree failed");
4924
4925         # non-textual hash id's can be cached
4926         my $expires;
4927         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4928                 $expires = "+1d";
4929         }
4930         my $refs = git_get_references();
4931         my $ref = format_ref_marker($refs, $co{'id'});
4932
4933         git_header_html(undef, $expires);
4934         git_print_page_nav('commit', '',
4935                            $hash, $co{'tree'}, $hash,
4936                            $formats_nav);
4937
4938         if (defined $co{'parent'}) {
4939                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
4940         } else {
4941                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
4942         }
4943         print "<div class=\"title_text\">\n" .
4944               "<table class=\"object_header\">\n";
4945         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
4946               "<tr>" .
4947               "<td></td><td> $ad{'rfc2822'}";
4948         if ($ad{'hour_local'} < 6) {
4949                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4950                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4951         } else {
4952                 printf(" (%02d:%02d %s)",
4953                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
4954         }
4955         print "</td>" .
4956               "</tr>\n";
4957         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
4958         print "<tr><td></td><td> $cd{'rfc2822'}" .
4959               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
4960               "</td></tr>\n";
4961         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
4962         print "<tr>" .
4963               "<td>tree</td>" .
4964               "<td class=\"sha1\">" .
4965               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
4966                        class => "list"}, $co{'tree'}) .
4967               "</td>" .
4968               "<td class=\"link\">" .
4969               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
4970                       "tree");
4971         my $snapshot_links = format_snapshot_links($hash);
4972         if (defined $snapshot_links) {
4973                 print " | " . $snapshot_links;
4974         }
4975         print "</td>" .
4976               "</tr>\n";
4977
4978         foreach my $par (@$parents) {
4979                 print "<tr>" .
4980                       "<td>parent</td>" .
4981                       "<td class=\"sha1\">" .
4982                       $cgi->a({-href => href(action=>"commit", hash=>$par),
4983                                class => "list"}, $par) .
4984                       "</td>" .
4985                       "<td class=\"link\">" .
4986                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
4987                       " | " .
4988                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
4989                       "</td>" .
4990                       "</tr>\n";
4991         }
4992         print "</table>".
4993               "</div>\n";
4994
4995         print "<div class=\"page_body\">\n";
4996         git_print_log($co{'comment'});
4997         print "</div>\n";
4998
4999         git_difftree_body(\@difftree, $hash, @$parents);
5000
5001         git_footer_html();
5002 }
5003
5004 sub git_object {
5005         # object is defined by:
5006         # - hash or hash_base alone
5007         # - hash_base and file_name
5008         my $type;
5009
5010         # - hash or hash_base alone
5011         if ($hash || ($hash_base && !defined $file_name)) {
5012                 my $object_id = $hash || $hash_base;
5013
5014                 open my $fd, "-|", quote_command(
5015                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5016                         or die_error(404, "Object does not exist");
5017                 $type = <$fd>;
5018                 chomp $type;
5019                 close $fd
5020                         or die_error(404, "Object does not exist");
5021
5022         # - hash_base and file_name
5023         } elsif ($hash_base && defined $file_name) {
5024                 $file_name =~ s,/+$,,;
5025
5026                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5027                         or die_error(404, "Base object does not exist");
5028
5029                 # here errors should not hapen
5030                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5031                         or die_error(500, "Open git-ls-tree failed");
5032                 my $line = <$fd>;
5033                 close $fd;
5034
5035                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5036                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5037                         die_error(404, "File or directory for given base does not exist");
5038                 }
5039                 $type = $2;
5040                 $hash = $3;
5041         } else {
5042                 die_error(400, "Not enough information to find object");
5043         }
5044
5045         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5046                                           hash=>$hash, hash_base=>$hash_base,
5047                                           file_name=>$file_name),
5048                              -status => '302 Found');
5049 }
5050
5051 sub git_blobdiff {
5052         my $format = shift || 'html';
5053
5054         my $fd;
5055         my @difftree;
5056         my %diffinfo;
5057         my $expires;
5058
5059         # preparing $fd and %diffinfo for git_patchset_body
5060         # new style URI
5061         if (defined $hash_base && defined $hash_parent_base) {
5062                 if (defined $file_name) {
5063                         # read raw output
5064                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5065                                 $hash_parent_base, $hash_base,
5066                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5067                                 or die_error(500, "Open git-diff-tree failed");
5068                         @difftree = map { chomp; $_ } <$fd>;
5069                         close $fd
5070                                 or die_error(404, "Reading git-diff-tree failed");
5071                         @difftree
5072                                 or die_error(404, "Blob diff not found");
5073
5074                 } elsif (defined $hash &&
5075                          $hash =~ /[0-9a-fA-F]{40}/) {
5076                         # try to find filename from $hash
5077
5078                         # read filtered raw output
5079                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5080                                 $hash_parent_base, $hash_base, "--"
5081                                 or die_error(500, "Open git-diff-tree failed");
5082                         @difftree =
5083                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5084                                 # $hash == to_id
5085                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5086                                 map { chomp; $_ } <$fd>;
5087                         close $fd
5088                                 or die_error(404, "Reading git-diff-tree failed");
5089                         @difftree
5090                                 or die_error(404, "Blob diff not found");
5091
5092                 } else {
5093                         die_error(400, "Missing one of the blob diff parameters");
5094                 }
5095
5096                 if (@difftree > 1) {
5097                         die_error(400, "Ambiguous blob diff specification");
5098                 }
5099
5100                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5101                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5102                 $file_name   ||= $diffinfo{'to_file'};
5103
5104                 $hash_parent ||= $diffinfo{'from_id'};
5105                 $hash        ||= $diffinfo{'to_id'};
5106
5107                 # non-textual hash id's can be cached
5108                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5109                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5110                         $expires = '+1d';
5111                 }
5112
5113                 # open patch output
5114                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5115                         '-p', ($format eq 'html' ? "--full-index" : ()),
5116                         $hash_parent_base, $hash_base,
5117                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5118                         or die_error(500, "Open git-diff-tree failed");
5119         }
5120
5121         # old/legacy style URI
5122         if (!%diffinfo && # if new style URI failed
5123             defined $hash && defined $hash_parent) {
5124                 # fake git-diff-tree raw output
5125                 $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
5126                 $diffinfo{'from_id'} = $hash_parent;
5127                 $diffinfo{'to_id'}   = $hash;
5128                 if (defined $file_name) {
5129                         if (defined $file_parent) {
5130                                 $diffinfo{'status'} = '2';
5131                                 $diffinfo{'from_file'} = $file_parent;
5132                                 $diffinfo{'to_file'}   = $file_name;
5133                         } else { # assume not renamed
5134                                 $diffinfo{'status'} = '1';
5135                                 $diffinfo{'from_file'} = $file_name;
5136                                 $diffinfo{'to_file'}   = $file_name;
5137                         }
5138                 } else { # no filename given
5139                         $diffinfo{'status'} = '2';
5140                         $diffinfo{'from_file'} = $hash_parent;
5141                         $diffinfo{'to_file'}   = $hash;
5142                 }
5143
5144                 # non-textual hash id's can be cached
5145                 if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
5146                     $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5147                         $expires = '+1d';
5148                 }
5149
5150                 # open patch output
5151                 open $fd, "-|", git_cmd(), "diff", @diff_opts,
5152                         '-p', ($format eq 'html' ? "--full-index" : ()),
5153                         $hash_parent, $hash, "--"
5154                         or die_error(500, "Open git-diff failed");
5155         } else  {
5156                 die_error(400, "Missing one of the blob diff parameters")
5157                         unless %diffinfo;
5158         }
5159
5160         # header
5161         if ($format eq 'html') {
5162                 my $formats_nav =
5163                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5164                                 "raw");
5165                 git_header_html(undef, $expires);
5166                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5167                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5168                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5169                 } else {
5170                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5171                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5172                 }
5173                 if (defined $file_name) {
5174                         git_print_page_path($file_name, "blob", $hash_base);
5175                 } else {
5176                         print "<div class=\"page_path\"></div>\n";
5177                 }
5178
5179         } elsif ($format eq 'plain') {
5180                 print $cgi->header(
5181                         -type => 'text/plain',
5182                         -charset => 'utf-8',
5183                         -expires => $expires,
5184                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5185
5186                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5187
5188         } else {
5189                 die_error(400, "Unknown blobdiff format");
5190         }
5191
5192         # patch
5193         if ($format eq 'html') {
5194                 print "<div class=\"page_body\">\n";
5195
5196                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5197                 close $fd;
5198
5199                 print "</div>\n"; # class="page_body"
5200                 git_footer_html();
5201
5202         } else {
5203                 while (my $line = <$fd>) {
5204                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5205                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5206
5207                         print $line;
5208
5209                         last if $line =~ m!^\+\+\+!;
5210                 }
5211                 local $/ = undef;
5212                 print <$fd>;
5213                 close $fd;
5214         }
5215 }
5216
5217 sub git_blobdiff_plain {
5218         git_blobdiff('plain');
5219 }
5220
5221 sub git_commitdiff {
5222         my $format = shift || 'html';
5223         $hash ||= $hash_base || "HEAD";
5224         my %co = parse_commit($hash)
5225             or die_error(404, "Unknown commit object");
5226
5227         # choose format for commitdiff for merge
5228         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5229                 $hash_parent = '--cc';
5230         }
5231         # we need to prepare $formats_nav before almost any parameter munging
5232         my $formats_nav;
5233         if ($format eq 'html') {
5234                 $formats_nav =
5235                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5236                                 "raw");
5237
5238                 if (defined $hash_parent &&
5239                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5240                         # commitdiff with two commits given
5241                         my $hash_parent_short = $hash_parent;
5242                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5243                                 $hash_parent_short = substr($hash_parent, 0, 7);
5244                         }
5245                         $formats_nav .=
5246                                 ' (from';
5247                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5248                                 if ($co{'parents'}[$i] eq $hash_parent) {
5249                                         $formats_nav .= ' parent ' . ($i+1);
5250                                         last;
5251                                 }
5252                         }
5253                         $formats_nav .= ': ' .
5254                                 $cgi->a({-href => href(action=>"commitdiff",
5255                                                        hash=>$hash_parent)},
5256                                         esc_html($hash_parent_short)) .
5257                                 ')';
5258                 } elsif (!$co{'parent'}) {
5259                         # --root commitdiff
5260                         $formats_nav .= ' (initial)';
5261                 } elsif (scalar @{$co{'parents'}} == 1) {
5262                         # single parent commit
5263                         $formats_nav .=
5264                                 ' (parent: ' .
5265                                 $cgi->a({-href => href(action=>"commitdiff",
5266                                                        hash=>$co{'parent'})},
5267                                         esc_html(substr($co{'parent'}, 0, 7))) .
5268                                 ')';
5269                 } else {
5270                         # merge commit
5271                         if ($hash_parent eq '--cc') {
5272                                 $formats_nav .= ' | ' .
5273                                         $cgi->a({-href => href(action=>"commitdiff",
5274                                                                hash=>$hash, hash_parent=>'-c')},
5275                                                 'combined');
5276                         } else { # $hash_parent eq '-c'
5277                                 $formats_nav .= ' | ' .
5278                                         $cgi->a({-href => href(action=>"commitdiff",
5279                                                                hash=>$hash, hash_parent=>'--cc')},
5280                                                 'compact');
5281                         }
5282                         $formats_nav .=
5283                                 ' (merge: ' .
5284                                 join(' ', map {
5285                                         $cgi->a({-href => href(action=>"commitdiff",
5286                                                                hash=>$_)},
5287                                                 esc_html(substr($_, 0, 7)));
5288                                 } @{$co{'parents'}} ) .
5289                                 ')';
5290                 }
5291         }
5292
5293         my $hash_parent_param = $hash_parent;
5294         if (!defined $hash_parent_param) {
5295                 # --cc for multiple parents, --root for parentless
5296                 $hash_parent_param =
5297                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5298         }
5299
5300         # read commitdiff
5301         my $fd;
5302         my @difftree;
5303         if ($format eq 'html') {
5304                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5305                         "--no-commit-id", "--patch-with-raw", "--full-index",
5306                         $hash_parent_param, $hash, "--"
5307                         or die_error(500, "Open git-diff-tree failed");
5308
5309                 while (my $line = <$fd>) {
5310                         chomp $line;
5311                         # empty line ends raw part of diff-tree output
5312                         last unless $line;
5313                         push @difftree, scalar parse_difftree_raw_line($line);
5314                 }
5315
5316         } elsif ($format eq 'plain') {
5317                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5318                         '-p', $hash_parent_param, $hash, "--"
5319                         or die_error(500, "Open git-diff-tree failed");
5320
5321         } else {
5322                 die_error(400, "Unknown commitdiff format");
5323         }
5324
5325         # non-textual hash id's can be cached
5326         my $expires;
5327         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5328                 $expires = "+1d";
5329         }
5330
5331         # write commit message
5332         if ($format eq 'html') {
5333                 my $refs = git_get_references();
5334                 my $ref = format_ref_marker($refs, $co{'id'});
5335
5336                 git_header_html(undef, $expires);
5337                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5338                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5339                 git_print_authorship(\%co);
5340                 print "<div class=\"page_body\">\n";
5341                 if (@{$co{'comment'}} > 1) {
5342                         print "<div class=\"log\">\n";
5343                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5344                         print "</div>\n"; # class="log"
5345                 }
5346
5347         } elsif ($format eq 'plain') {
5348                 my $refs = git_get_references("tags");
5349                 my $tagname = git_get_rev_name_tags($hash);
5350                 my $filename = basename($project) . "-$hash.patch";
5351
5352                 print $cgi->header(
5353                         -type => 'text/plain',
5354                         -charset => 'utf-8',
5355                         -expires => $expires,
5356                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5357                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5358                 print "From: " . to_utf8($co{'author'}) . "\n";
5359                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5360                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5361
5362                 print "X-Git-Tag: $tagname\n" if $tagname;
5363                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5364
5365                 foreach my $line (@{$co{'comment'}}) {
5366                         print to_utf8($line) . "\n";
5367                 }
5368                 print "---\n\n";
5369         }
5370
5371         # write patch
5372         if ($format eq 'html') {
5373                 my $use_parents = !defined $hash_parent ||
5374                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5375                 git_difftree_body(\@difftree, $hash,
5376                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5377                 print "<br/>\n";
5378
5379                 git_patchset_body($fd, \@difftree, $hash,
5380                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5381                 close $fd;
5382                 print "</div>\n"; # class="page_body"
5383                 git_footer_html();
5384
5385         } elsif ($format eq 'plain') {
5386                 local $/ = undef;
5387                 print <$fd>;
5388                 close $fd
5389                         or print "Reading git-diff-tree failed\n";
5390         }
5391 }
5392
5393 sub git_commitdiff_plain {
5394         git_commitdiff('plain');
5395 }
5396
5397 sub git_history {
5398         if (!defined $hash_base) {
5399                 $hash_base = git_get_head_hash($project);
5400         }
5401         if (!defined $page) {
5402                 $page = 0;
5403         }
5404         my $ftype;
5405         my %co = parse_commit($hash_base)
5406             or die_error(404, "Unknown commit object");
5407
5408         my $refs = git_get_references();
5409         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5410
5411         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5412                                        $file_name, "--full-history")
5413             or die_error(404, "No such file or directory on given branch");
5414
5415         if (!defined $hash && defined $file_name) {
5416                 # some commits could have deleted file in question,
5417                 # and not have it in tree, but one of them has to have it
5418                 for (my $i = 0; $i <= @commitlist; $i++) {
5419                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5420                         last if defined $hash;
5421                 }
5422         }
5423         if (defined $hash) {
5424                 $ftype = git_get_type($hash);
5425         }
5426         if (!defined $ftype) {
5427                 die_error(500, "Unknown type of object");
5428         }
5429
5430         my $paging_nav = '';
5431         if ($page > 0) {
5432                 $paging_nav .=
5433                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5434                                                file_name=>$file_name)},
5435                                 "first");
5436                 $paging_nav .= " &sdot; " .
5437                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5438                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5439         } else {
5440                 $paging_nav .= "first";
5441                 $paging_nav .= " &sdot; prev";
5442         }
5443         my $next_link = '';
5444         if ($#commitlist >= 100) {
5445                 $next_link =
5446                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5447                                  -accesskey => "n", -title => "Alt-n"}, "next");
5448                 $paging_nav .= " &sdot; $next_link";
5449         } else {
5450                 $paging_nav .= " &sdot; next";
5451         }
5452
5453         git_header_html();
5454         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5455         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5456         git_print_page_path($file_name, $ftype, $hash_base);
5457
5458         git_history_body(\@commitlist, 0, 99,
5459                          $refs, $hash_base, $ftype, $next_link);
5460
5461         git_footer_html();
5462 }
5463
5464 sub git_search {
5465         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5466         if (!defined $searchtext) {
5467                 die_error(400, "Text field is empty");
5468         }
5469         if (!defined $hash) {
5470                 $hash = git_get_head_hash($project);
5471         }
5472         my %co = parse_commit($hash);
5473         if (!%co) {
5474                 die_error(404, "Unknown commit object");
5475         }
5476         if (!defined $page) {
5477                 $page = 0;
5478         }
5479
5480         $searchtype ||= 'commit';
5481         if ($searchtype eq 'pickaxe') {
5482                 # pickaxe may take all resources of your box and run for several minutes
5483                 # with every query - so decide by yourself how public you make this feature
5484                 gitweb_check_feature('pickaxe')
5485                     or die_error(403, "Pickaxe is disabled");
5486         }
5487         if ($searchtype eq 'grep') {
5488                 gitweb_check_feature('grep')
5489                     or die_error(403, "Grep is disabled");
5490         }
5491
5492         git_header_html();
5493
5494         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5495                 my $greptype;
5496                 if ($searchtype eq 'commit') {
5497                         $greptype = "--grep=";
5498                 } elsif ($searchtype eq 'author') {
5499                         $greptype = "--author=";
5500                 } elsif ($searchtype eq 'committer') {
5501                         $greptype = "--committer=";
5502                 }
5503                 $greptype .= $searchtext;
5504                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5505                                                $greptype, '--regexp-ignore-case',
5506                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5507
5508                 my $paging_nav = '';
5509                 if ($page > 0) {
5510                         $paging_nav .=
5511                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5512                                                        searchtext=>$searchtext,
5513                                                        searchtype=>$searchtype)},
5514                                         "first");
5515                         $paging_nav .= " &sdot; " .
5516                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5517                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5518                 } else {
5519                         $paging_nav .= "first";
5520                         $paging_nav .= " &sdot; prev";
5521                 }
5522                 my $next_link = '';
5523                 if ($#commitlist >= 100) {
5524                         $next_link =
5525                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5526                                          -accesskey => "n", -title => "Alt-n"}, "next");
5527                         $paging_nav .= " &sdot; $next_link";
5528                 } else {
5529                         $paging_nav .= " &sdot; next";
5530                 }
5531
5532                 if ($#commitlist >= 100) {
5533                 }
5534
5535                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5536                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5537                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5538         }
5539
5540         if ($searchtype eq 'pickaxe') {
5541                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5542                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5543
5544                 print "<table class=\"pickaxe search\">\n";
5545                 my $alternate = 1;
5546                 $/ = "\n";
5547                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5548                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5549                         ($search_use_regexp ? '--pickaxe-regex' : ());
5550                 undef %co;
5551                 my @files;
5552                 while (my $line = <$fd>) {
5553                         chomp $line;
5554                         next unless $line;
5555
5556                         my %set = parse_difftree_raw_line($line);
5557                         if (defined $set{'commit'}) {
5558                                 # finish previous commit
5559                                 if (%co) {
5560                                         print "</td>\n" .
5561                                               "<td class=\"link\">" .
5562                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5563                                               " | " .
5564                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5565                                         print "</td>\n" .
5566                                               "</tr>\n";
5567                                 }
5568
5569                                 if ($alternate) {
5570                                         print "<tr class=\"dark\">\n";
5571                                 } else {
5572                                         print "<tr class=\"light\">\n";
5573                                 }
5574                                 $alternate ^= 1;
5575                                 %co = parse_commit($set{'commit'});
5576                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5577                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5578                                       "<td><i>$author</i></td>\n" .
5579                                       "<td>" .
5580                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5581                                               -class => "list subject"},
5582                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5583                         } elsif (defined $set{'to_id'}) {
5584                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5585
5586                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5587                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5588                                               -class => "list"},
5589                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5590                                       "<br/>\n";
5591                         }
5592                 }
5593                 close $fd;
5594
5595                 # finish last commit (warning: repetition!)
5596                 if (%co) {
5597                         print "</td>\n" .
5598                               "<td class=\"link\">" .
5599                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5600                               " | " .
5601                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5602                         print "</td>\n" .
5603                               "</tr>\n";
5604                 }
5605
5606                 print "</table>\n";
5607         }
5608
5609         if ($searchtype eq 'grep') {
5610                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5611                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5612
5613                 print "<table class=\"grep_search\">\n";
5614                 my $alternate = 1;
5615                 my $matches = 0;
5616                 $/ = "\n";
5617                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5618                         $search_use_regexp ? ('-E', '-i') : '-F',
5619                         $searchtext, $co{'tree'};
5620                 my $lastfile = '';
5621                 while (my $line = <$fd>) {
5622                         chomp $line;
5623                         my ($file, $lno, $ltext, $binary);
5624                         last if ($matches++ > 1000);
5625                         if ($line =~ /^Binary file (.+) matches$/) {
5626                                 $file = $1;
5627                                 $binary = 1;
5628                         } else {
5629                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5630                         }
5631                         if ($file ne $lastfile) {
5632                                 $lastfile and print "</td></tr>\n";
5633                                 if ($alternate++) {
5634                                         print "<tr class=\"dark\">\n";
5635                                 } else {
5636                                         print "<tr class=\"light\">\n";
5637                                 }
5638                                 print "<td class=\"list\">".
5639                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5640                                                                file_name=>"$file"),
5641                                                 -class => "list"}, esc_path($file));
5642                                 print "</td><td>\n";
5643                                 $lastfile = $file;
5644                         }
5645                         if ($binary) {
5646                                 print "<div class=\"binary\">Binary file</div>\n";
5647                         } else {
5648                                 $ltext = untabify($ltext);
5649                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5650                                         $ltext = esc_html($1, -nbsp=>1);
5651                                         $ltext .= '<span class="match">';
5652                                         $ltext .= esc_html($2, -nbsp=>1);
5653                                         $ltext .= '</span>';
5654                                         $ltext .= esc_html($3, -nbsp=>1);
5655                                 } else {
5656                                         $ltext = esc_html($ltext, -nbsp=>1);
5657                                 }
5658                                 print "<div class=\"pre\">" .
5659                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5660                                                                file_name=>"$file").'#l'.$lno,
5661                                                 -class => "linenr"}, sprintf('%4i', $lno))
5662                                         . ' ' .  $ltext . "</div>\n";
5663                         }
5664                 }
5665                 if ($lastfile) {
5666                         print "</td></tr>\n";
5667                         if ($matches > 1000) {
5668                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5669                         }
5670                 } else {
5671                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5672                 }
5673                 close $fd;
5674
5675                 print "</table>\n";
5676         }
5677         git_footer_html();
5678 }
5679
5680 sub git_search_help {
5681         git_header_html();
5682         git_print_page_nav('','', $hash,$hash,$hash);
5683         print <<EOT;
5684 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5685 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5686 the pattern entered is recognized as the POSIX extended
5687 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5688 insensitive).</p>
5689 <dl>
5690 <dt><b>commit</b></dt>
5691 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5692 EOT
5693         my ($have_grep) = gitweb_check_feature('grep');
5694         if ($have_grep) {
5695                 print <<EOT;
5696 <dt><b>grep</b></dt>
5697 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5698     a different one) are searched for the given pattern. On large trees, this search can take
5699 a while and put some strain on the server, so please use it with some consideration. Note that
5700 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5701 case-sensitive.</dd>
5702 EOT
5703         }
5704         print <<EOT;
5705 <dt><b>author</b></dt>
5706 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5707 <dt><b>committer</b></dt>
5708 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5709 EOT
5710         my ($have_pickaxe) = gitweb_check_feature('pickaxe');
5711         if ($have_pickaxe) {
5712                 print <<EOT;
5713 <dt><b>pickaxe</b></dt>
5714 <dd>All commits that caused the string to appear or disappear from any file (changes that
5715 added, removed or "modified" the string) will be listed. This search can take a while and
5716 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5717 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5718 EOT
5719         }
5720         print "</dl>\n";
5721         git_footer_html();
5722 }
5723
5724 sub git_shortlog {
5725         my $head = git_get_head_hash($project);
5726         if (!defined $hash) {
5727                 $hash = $head;
5728         }
5729         if (!defined $page) {
5730                 $page = 0;
5731         }
5732         my $refs = git_get_references();
5733
5734         my $commit_hash = $hash;
5735         if (defined $hash_parent) {
5736                 $commit_hash = "$hash_parent..$hash";
5737         }
5738         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5739
5740         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5741         my $next_link = '';
5742         if ($#commitlist >= 100) {
5743                 $next_link =
5744                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5745                                  -accesskey => "n", -title => "Alt-n"}, "next");
5746         }
5747
5748         git_header_html();
5749         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5750         git_print_header_div('summary', $project);
5751
5752         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5753
5754         git_footer_html();
5755 }
5756
5757 ## ......................................................................
5758 ## feeds (RSS, Atom; OPML)
5759
5760 sub git_feed {
5761         my $format = shift || 'atom';
5762         my ($have_blame) = gitweb_check_feature('blame');
5763
5764         # Atom: http://www.atomenabled.org/developers/syndication/
5765         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
5766         if ($format ne 'rss' && $format ne 'atom') {
5767                 die_error(400, "Unknown web feed format");
5768         }
5769
5770         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
5771         my $head = $hash || 'HEAD';
5772         my @commitlist = parse_commits($head, 150, 0, $file_name);
5773
5774         my %latest_commit;
5775         my %latest_date;
5776         my $content_type = "application/$format+xml";
5777         if (defined $cgi->http('HTTP_ACCEPT') &&
5778                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
5779                 # browser (feed reader) prefers text/xml
5780                 $content_type = 'text/xml';
5781         }
5782         if (defined($commitlist[0])) {
5783                 %latest_commit = %{$commitlist[0]};
5784                 %latest_date   = parse_date($latest_commit{'author_epoch'});
5785                 print $cgi->header(
5786                         -type => $content_type,
5787                         -charset => 'utf-8',
5788                         -last_modified => $latest_date{'rfc2822'});
5789         } else {
5790                 print $cgi->header(
5791                         -type => $content_type,
5792                         -charset => 'utf-8');
5793         }
5794
5795         # Optimization: skip generating the body if client asks only
5796         # for Last-Modified date.
5797         return if ($cgi->request_method() eq 'HEAD');
5798
5799         # header variables
5800         my $title = "$site_name - $project/$action";
5801         my $feed_type = 'log';
5802         if (defined $hash) {
5803                 $title .= " - '$hash'";
5804                 $feed_type = 'branch log';
5805                 if (defined $file_name) {
5806                         $title .= " :: $file_name";
5807                         $feed_type = 'history';
5808                 }
5809         } elsif (defined $file_name) {
5810                 $title .= " - $file_name";
5811                 $feed_type = 'history';
5812         }
5813         $title .= " $feed_type";
5814         my $descr = git_get_project_description($project);
5815         if (defined $descr) {
5816                 $descr = esc_html($descr);
5817         } else {
5818                 $descr = "$project " .
5819                          ($format eq 'rss' ? 'RSS' : 'Atom') .
5820                          " feed";
5821         }
5822         my $owner = git_get_project_owner($project);
5823         $owner = esc_html($owner);
5824
5825         #header
5826         my $alt_url;
5827         if (defined $file_name) {
5828                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
5829         } elsif (defined $hash) {
5830                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
5831         } else {
5832                 $alt_url = href(-full=>1, action=>"summary");
5833         }
5834         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
5835         if ($format eq 'rss') {
5836                 print <<XML;
5837 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
5838 <channel>
5839 XML
5840                 print "<title>$title</title>\n" .
5841                       "<link>$alt_url</link>\n" .
5842                       "<description>$descr</description>\n" .
5843                       "<language>en</language>\n";
5844         } elsif ($format eq 'atom') {
5845                 print <<XML;
5846 <feed xmlns="http://www.w3.org/2005/Atom">
5847 XML
5848                 print "<title>$title</title>\n" .
5849                       "<subtitle>$descr</subtitle>\n" .
5850                       '<link rel="alternate" type="text/html" href="' .
5851                       $alt_url . '" />' . "\n" .
5852                       '<link rel="self" type="' . $content_type . '" href="' .
5853                       $cgi->self_url() . '" />' . "\n" .
5854                       "<id>" . href(-full=>1) . "</id>\n" .
5855                       # use project owner for feed author
5856                       "<author><name>$owner</name></author>\n";
5857                 if (defined $favicon) {
5858                         print "<icon>" . esc_url($favicon) . "</icon>\n";
5859                 }
5860                 if (defined $logo_url) {
5861                         # not twice as wide as tall: 72 x 27 pixels
5862                         print "<logo>" . esc_url($logo) . "</logo>\n";
5863                 }
5864                 if (! %latest_date) {
5865                         # dummy date to keep the feed valid until commits trickle in:
5866                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
5867                 } else {
5868                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
5869                 }
5870         }
5871
5872         # contents
5873         for (my $i = 0; $i <= $#commitlist; $i++) {
5874                 my %co = %{$commitlist[$i]};
5875                 my $commit = $co{'id'};
5876                 # we read 150, we always show 30 and the ones more recent than 48 hours
5877                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
5878                         last;
5879                 }
5880                 my %cd = parse_date($co{'author_epoch'});
5881
5882                 # get list of changed files
5883                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5884                         $co{'parent'} || "--root",
5885                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
5886                         or next;
5887                 my @difftree = map { chomp; $_ } <$fd>;
5888                 close $fd
5889                         or next;
5890
5891                 # print element (entry, item)
5892                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
5893                 if ($format eq 'rss') {
5894                         print "<item>\n" .
5895                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
5896                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
5897                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
5898                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
5899                               "<link>$co_url</link>\n" .
5900                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
5901                               "<content:encoded>" .
5902                               "<![CDATA[\n";
5903                 } elsif ($format eq 'atom') {
5904                         print "<entry>\n" .
5905                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
5906                               "<updated>$cd{'iso-8601'}</updated>\n" .
5907                               "<author>\n" .
5908                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
5909                         if ($co{'author_email'}) {
5910                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
5911                         }
5912                         print "</author>\n" .
5913                               # use committer for contributor
5914                               "<contributor>\n" .
5915                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
5916                         if ($co{'committer_email'}) {
5917                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
5918                         }
5919                         print "</contributor>\n" .
5920                               "<published>$cd{'iso-8601'}</published>\n" .
5921                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
5922                               "<id>$co_url</id>\n" .
5923                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
5924                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
5925                 }
5926                 my $comment = $co{'comment'};
5927                 print "<pre>\n";
5928                 foreach my $line (@$comment) {
5929                         $line = esc_html($line);
5930                         print "$line\n";
5931                 }
5932                 print "</pre><ul>\n";
5933                 foreach my $difftree_line (@difftree) {
5934                         my %difftree = parse_difftree_raw_line($difftree_line);
5935                         next if !$difftree{'from_id'};
5936
5937                         my $file = $difftree{'file'} || $difftree{'to_file'};
5938
5939                         print "<li>" .
5940                               "[" .
5941                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
5942                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
5943                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
5944                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
5945                                       -title => "diff"}, 'D');
5946                         if ($have_blame) {
5947                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
5948                                                              file_name=>$file, hash_base=>$commit),
5949                                               -title => "blame"}, 'B');
5950                         }
5951                         # if this is not a feed of a file history
5952                         if (!defined $file_name || $file_name ne $file) {
5953                                 print $cgi->a({-href => href(-full=>1, action=>"history",
5954                                                              file_name=>$file, hash=>$commit),
5955                                               -title => "history"}, 'H');
5956                         }
5957                         $file = esc_path($file);
5958                         print "] ".
5959                               "$file</li>\n";
5960                 }
5961                 if ($format eq 'rss') {
5962                         print "</ul>]]>\n" .
5963                               "</content:encoded>\n" .
5964                               "</item>\n";
5965                 } elsif ($format eq 'atom') {
5966                         print "</ul>\n</div>\n" .
5967                               "</content>\n" .
5968                               "</entry>\n";
5969                 }
5970         }
5971
5972         # end of feed
5973         if ($format eq 'rss') {
5974                 print "</channel>\n</rss>\n";
5975         }       elsif ($format eq 'atom') {
5976                 print "</feed>\n";
5977         }
5978 }
5979
5980 sub git_rss {
5981         git_feed('rss');
5982 }
5983
5984 sub git_atom {
5985         git_feed('atom');
5986 }
5987
5988 sub git_opml {
5989         my @list = git_get_projects_list();
5990
5991         print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
5992         print <<XML;
5993 <?xml version="1.0" encoding="utf-8"?>
5994 <opml version="1.0">
5995 <head>
5996   <title>$site_name OPML Export</title>
5997 </head>
5998 <body>
5999 <outline text="git RSS feeds">
6000 XML
6001
6002         foreach my $pr (@list) {
6003                 my %proj = %$pr;
6004                 my $head = git_get_head_hash($proj{'path'});
6005                 if (!defined $head) {
6006                         next;
6007                 }
6008                 $git_dir = "$projectroot/$proj{'path'}";
6009                 my %co = parse_commit($head);
6010                 if (!%co) {
6011                         next;
6012                 }
6013
6014                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6015                 my $rss  = "$my_url?p=$proj{'path'};a=rss";
6016                 my $html = "$my_url?p=$proj{'path'};a=summary";
6017                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6018         }
6019         print <<XML;
6020 </outline>
6021 </body>
6022 </opml>
6023 XML
6024 }