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 = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # You define site-wide feature defaults here; override them with
 199 # $GITWEB_CONFIG as necessary.
 200 our %feature = (
 201         # feature => {
 202         #       'sub' => feature-sub (subroutine),
 203         #       'override' => allow-override (boolean),
 204         #       'default' => [ default options...] (array reference)}
 205         #
 206         # if feature is overridable (it means that allow-override has true value),
 207         # then feature-sub will be called with default options as parameters;
 208         # return value of feature-sub indicates if to enable specified feature
 209         #
 210         # if there is no 'sub' key (no feature-sub), then feature cannot be
 211         # overriden
 212         #
 213         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 214         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 215         # is enabled
 216
 217         # Enable the 'blame' blob view, showing the last commit that modified
 218         # each line in the file. This can be very CPU-intensive.
 219
 220         # To enable system wide have in $GITWEB_CONFIG
 221         # $feature{'blame'}{'default'} = [1];
 222         # To have project specific config enable override in $GITWEB_CONFIG
 223         # $feature{'blame'}{'override'} = 1;
 224         # and in project config gitweb.blame = 0|1;
 225         'blame' => {
 226                 'sub' => sub { feature_bool('blame', @_) },
 227                 'override' => 0,
 228                 'default' => [0]},
 229
 230         # Enable the 'snapshot' link, providing a compressed archive of any
 231         # tree. This can potentially generate high traffic if you have large
 232         # project.
 233
 234         # Value is a list of formats defined in %known_snapshot_formats that
 235         # you wish to offer.
 236         # To disable system wide have in $GITWEB_CONFIG
 237         # $feature{'snapshot'}{'default'} = [];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'snapshot'}{'override'} = 1;
 240         # and in project config, a comma-separated list of formats or "none"
 241         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 242         'snapshot' => {
 243                 'sub' => \&feature_snapshot,
 244                 'override' => 0,
 245                 'default' => ['tgz']},
 246
 247         # Enable text search, which will list the commits which match author,
 248         # committer or commit text to a given string.  Enabled by default.
 249         # Project specific override is not supported.
 250         'search' => {
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Enable grep search, which will list the files in currently selected
 255         # tree containing the given string. Enabled by default. This can be
 256         # potentially CPU-intensive, of course.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'grep'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'grep'}{'override'} = 1;
 262         # and in project config gitweb.grep = 0|1;
 263         'grep' => {
 264                 'sub' => sub { feature_bool('grep', @_) },
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable the pickaxe search, which will list the commits that modified
 269         # a given string in a file. This can be practical and quite faster
 270         # alternative to 'blame', but still potentially CPU-intensive.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'pickaxe'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'pickaxe'}{'override'} = 1;
 276         # and in project config gitweb.pickaxe = 0|1;
 277         'pickaxe' => {
 278                 'sub' => sub { feature_bool('pickaxe', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Make gitweb use an alternative format of the URLs which can be
 283         # more readable and natural-looking: project name is embedded
 284         # directly in the path and the query string contains other
 285         # auxiliary information. All gitweb installations recognize
 286         # URL in either format; this configures in which formats gitweb
 287         # generates links.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'pathinfo'}{'default'} = [1];
 291         # Project specific override is not supported.
 292
 293         # Note that you will need to change the default location of CSS,
 294         # favicon, logo and possibly other files to an absolute URL. Also,
 295         # if gitweb.cgi serves as your indexfile, you will need to force
 296         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 297         'pathinfo' => {
 298                 'override' => 0,
 299                 'default' => [0]},
 300
 301         # Make gitweb consider projects in project root subdirectories
 302         # to be forks of existing projects. Given project $projname.git,
 303         # projects matching $projname/*.git will not be shown in the main
 304         # projects list, instead a '+' mark will be added to $projname
 305         # there and a 'forks' view will be enabled for the project, listing
 306         # all the forks. If project list is taken from a file, forks have
 307         # to be listed after the main project.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'forks'}{'default'} = [1];
 311         # Project specific override is not supported.
 312         'forks' => {
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Insert custom links to the action bar of all project pages.
 317         # This enables you mainly to link to third-party scripts integrating
 318         # into gitweb; e.g. git-browser for graphical history representation
 319         # or custom web-based repository administration interface.
 320
 321         # The 'default' value consists of a list of triplets in the form
 322         # (label, link, position) where position is the label after which
 323         # to insert the link and link is a format string where %n expands
 324         # to the project name, %f to the project path within the filesystem,
 325         # %h to the current hash (h gitweb parameter) and %b to the current
 326         # hash base (hb gitweb parameter); %% expands to %.
 327
 328         # To enable system wide have in $GITWEB_CONFIG e.g.
 329         # $feature{'actions'}{'default'} = [('graphiclog',
 330         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 331         # Project specific override is not supported.
 332         'actions' => {
 333                 'override' => 0,
 334                 'default' => []},
 335
 336         # Allow gitweb scan project content tags described in ctags/
 337         # of project repository, and display the popular Web 2.0-ish
 338         # "tag cloud" near the project list. Note that this is something
 339         # COMPLETELY different from the normal Git tags.
 340
 341         # gitweb by itself can show existing tags, but it does not handle
 342         # tagging itself; you need an external application for that.
 343         # For an example script, check Girocco's cgi/tagproj.cgi.
 344         # You may want to install the HTML::TagCloud Perl module to get
 345         # a pretty tag cloud instead of just a list of tags.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 349         # Project specific override is not supported.
 350         'ctags' => {
 351                 'override' => 0,
 352                 'default' => [0]},
 353
 354         # The maximum number of patches in a patchset generated in patch
 355         # view. Set this to 0 or undef to disable patch view, or to a
 356         # negative number to remove any limit.
 357
 358         # To disable system wide have in $GITWEB_CONFIG
 359         # $feature{'patches'}{'default'} = [0];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'patches'}{'override'} = 1;
 362         # and in project config gitweb.patches = 0|n;
 363         # where n is the maximum number of patches allowed in a patchset.
 364         'patches' => {
 365                 'sub' => \&feature_patches,
 366                 'override' => 0,
 367                 'default' => [16]},
 368 );
 369
 370 sub gitweb_get_feature {
 371         my ($name) = @_;
 372         return unless exists $feature{$name};
 373         my ($sub, $override, @defaults) = (
 374                 $feature{$name}{'sub'},
 375                 $feature{$name}{'override'},
 376                 @{$feature{$name}{'default'}});
 377         if (!$override) { return @defaults; }
 378         if (!defined $sub) {
 379                 warn "feature $name is not overrideable";
 380                 return @defaults;
 381         }
 382         return $sub->(@defaults);
 383 }
 384
 385 # A wrapper to check if a given feature is enabled.
 386 # With this, you can say
 387 #
 388 #   my $bool_feat = gitweb_check_feature('bool_feat');
 389 #   gitweb_check_feature('bool_feat') or somecode;
 390 #
 391 # instead of
 392 #
 393 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 394 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 395 #
 396 sub gitweb_check_feature {
 397         return (gitweb_get_feature(@_))[0];
 398 }
 399
 400
 401 sub feature_bool {
 402         my $key = shift;
 403         my ($val) = git_get_project_config($key, '--bool');
 404
 405         if (!defined $val) {
 406                 return ($_[0]);
 407         } elsif ($val eq 'true') {
 408                 return (1);
 409         } elsif ($val eq 'false') {
 410                 return (0);
 411         }
 412 }
 413
 414 sub feature_snapshot {
 415         my (@fmts) = @_;
 416
 417         my ($val) = git_get_project_config('snapshot');
 418
 419         if ($val) {
 420                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 421         }
 422
 423         return @fmts;
 424 }
 425
 426 sub feature_patches {
 427         my @val = (git_get_project_config('patches', '--int'));
 428
 429         if (@val) {
 430                 return @val;
 431         }
 432
 433         return ($_[0]);
 434 }
 435
 436 # checking HEAD file with -e is fragile if the repository was
 437 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 438 # and then pruned.
 439 sub check_head_link {
 440         my ($dir) = @_;
 441         my $headfile = "$dir/HEAD";
 442         return ((-e $headfile) ||
 443                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 444 }
 445
 446 sub check_export_ok {
 447         my ($dir) = @_;
 448         return (check_head_link($dir) &&
 449                 (!$export_ok || -e "$dir/$export_ok") &&
 450                 (!$export_auth_hook || $export_auth_hook->($dir)));
 451 }
 452
 453 # process alternate names for backward compatibility
 454 # filter out unsupported (unknown) snapshot formats
 455 sub filter_snapshot_fmts {
 456         my @fmts = @_;
 457
 458         @fmts = map {
 459                 exists $known_snapshot_format_aliases{$_} ?
 460                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 461         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 462
 463 }
 464
 465 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 466 if (-e $GITWEB_CONFIG) {
 467         do $GITWEB_CONFIG;
 468 } else {
 469         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 470         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 471 }
 472
 473 # version of the core git binary
 474 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 475
 476 $projects_list ||= $projectroot;
 477
 478 # ======================================================================
 479 # input validation and dispatch
 480
 481 # input parameters can be collected from a variety of sources (presently, CGI
 482 # and PATH_INFO), so we define an %input_params hash that collects them all
 483 # together during validation: this allows subsequent uses (e.g. href()) to be
 484 # agnostic of the parameter origin
 485
 486 our %input_params = ();
 487
 488 # input parameters are stored with the long parameter name as key. This will
 489 # also be used in the href subroutine to convert parameters to their CGI
 490 # equivalent, and since the href() usage is the most frequent one, we store
 491 # the name -> CGI key mapping here, instead of the reverse.
 492 #
 493 # XXX: Warning: If you touch this, check the search form for updating,
 494 # too.
 495
 496 our @cgi_param_mapping = (
 497         project => "p",
 498         action => "a",
 499         file_name => "f",
 500         file_parent => "fp",
 501         hash => "h",
 502         hash_parent => "hp",
 503         hash_base => "hb",
 504         hash_parent_base => "hpb",
 505         page => "pg",
 506         order => "o",
 507         searchtext => "s",
 508         searchtype => "st",
 509         snapshot_format => "sf",
 510         extra_options => "opt",
 511         search_use_regexp => "sr",
 512 );
 513 our %cgi_param_mapping = @cgi_param_mapping;
 514
 515 # we will also need to know the possible actions, for validation
 516 our %actions = (
 517         "blame" => \&git_blame,
 518         "blobdiff" => \&git_blobdiff,
 519         "blobdiff_plain" => \&git_blobdiff_plain,
 520         "blob" => \&git_blob,
 521         "blob_plain" => \&git_blob_plain,
 522         "commitdiff" => \&git_commitdiff,
 523         "commitdiff_plain" => \&git_commitdiff_plain,
 524         "commit" => \&git_commit,
 525         "forks" => \&git_forks,
 526         "heads" => \&git_heads,
 527         "history" => \&git_history,
 528         "log" => \&git_log,
 529         "patch" => \&git_patch,
 530         "patches" => \&git_patches,
 531         "rss" => \&git_rss,
 532         "atom" => \&git_atom,
 533         "search" => \&git_search,
 534         "search_help" => \&git_search_help,
 535         "shortlog" => \&git_shortlog,
 536         "summary" => \&git_summary,
 537         "tag" => \&git_tag,
 538         "tags" => \&git_tags,
 539         "tree" => \&git_tree,
 540         "snapshot" => \&git_snapshot,
 541         "object" => \&git_object,
 542         # those below don't need $project
 543         "opml" => \&git_opml,
 544         "project_list" => \&git_project_list,
 545         "project_index" => \&git_project_index,
 546 );
 547
 548 # finally, we have the hash of allowed extra_options for the commands that
 549 # allow them
 550 our %allowed_options = (
 551         "--no-merges" => [ qw(rss atom log shortlog history) ],
 552 );
 553
 554 # fill %input_params with the CGI parameters. All values except for 'opt'
 555 # should be single values, but opt can be an array. We should probably
 556 # build an array of parameters that can be multi-valued, but since for the time
 557 # being it's only this one, we just single it out
 558 while (my ($name, $symbol) = each %cgi_param_mapping) {
 559         if ($symbol eq 'opt') {
 560                 $input_params{$name} = [ $cgi->param($symbol) ];
 561         } else {
 562                 $input_params{$name} = $cgi->param($symbol);
 563         }
 564 }
 565
 566 # now read PATH_INFO and update the parameter list for missing parameters
 567 sub evaluate_path_info {
 568         return if defined $input_params{'project'};
 569         return if !$path_info;
 570         $path_info =~ s,^/+,,;
 571         return if !$path_info;
 572
 573         # find which part of PATH_INFO is project
 574         my $project = $path_info;
 575         $project =~ s,/+$,,;
 576         while ($project && !check_head_link("$projectroot/$project")) {
 577                 $project =~ s,/*[^/]*$,,;
 578         }
 579         return unless $project;
 580         $input_params{'project'} = $project;
 581
 582         # do not change any parameters if an action is given using the query string
 583         return if $input_params{'action'};
 584         $path_info =~ s,^\Q$project\E/*,,;
 585
 586         # next, check if we have an action
 587         my $action = $path_info;
 588         $action =~ s,/.*$,,;
 589         if (exists $actions{$action}) {
 590                 $path_info =~ s,^$action/*,,;
 591                 $input_params{'action'} = $action;
 592         }
 593
 594         # list of actions that want hash_base instead of hash, but can have no
 595         # pathname (f) parameter
 596         my @wants_base = (
 597                 'tree',
 598                 'history',
 599         );
 600
 601         # we want to catch
 602         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 603         my ($parentrefname, $parentpathname, $refname, $pathname) =
 604                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 605
 606         # first, analyze the 'current' part
 607         if (defined $pathname) {
 608                 # we got "branch:filename" or "branch:dir/"
 609                 # we could use git_get_type(branch:pathname), but:
 610                 # - it needs $git_dir
 611                 # - it does a git() call
 612                 # - the convention of terminating directories with a slash
 613                 #   makes it superfluous
 614                 # - embedding the action in the PATH_INFO would make it even
 615                 #   more superfluous
 616                 $pathname =~ s,^/+,,;
 617                 if (!$pathname || substr($pathname, -1) eq "/") {
 618                         $input_params{'action'} ||= "tree";
 619                         $pathname =~ s,/$,,;
 620                 } else {
 621                         # the default action depends on whether we had parent info
 622                         # or not
 623                         if ($parentrefname) {
 624                                 $input_params{'action'} ||= "blobdiff_plain";
 625                         } else {
 626                                 $input_params{'action'} ||= "blob_plain";
 627                         }
 628                 }
 629                 $input_params{'hash_base'} ||= $refname;
 630                 $input_params{'file_name'} ||= $pathname;
 631         } elsif (defined $refname) {
 632                 # we got "branch". In this case we have to choose if we have to
 633                 # set hash or hash_base.
 634                 #
 635                 # Most of the actions without a pathname only want hash to be
 636                 # set, except for the ones specified in @wants_base that want
 637                 # hash_base instead. It should also be noted that hand-crafted
 638                 # links having 'history' as an action and no pathname or hash
 639                 # set will fail, but that happens regardless of PATH_INFO.
 640                 $input_params{'action'} ||= "shortlog";
 641                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 642                         $input_params{'hash_base'} ||= $refname;
 643                 } else {
 644                         $input_params{'hash'} ||= $refname;
 645                 }
 646         }
 647
 648         # next, handle the 'parent' part, if present
 649         if (defined $parentrefname) {
 650                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 651                 # someproject/blobdiff/oldrev..newrev:/filename
 652                 if ($parentpathname) {
 653                         $parentpathname =~ s,^/+,,;
 654                         $parentpathname =~ s,/$,,;
 655                         $input_params{'file_parent'} ||= $parentpathname;
 656                 } else {
 657                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 658                 }
 659                 # we assume that hash_parent_base is wanted if a path was specified,
 660                 # or if the action wants hash_base instead of hash
 661                 if (defined $input_params{'file_parent'} ||
 662                         grep { $_ eq $input_params{'action'} } @wants_base) {
 663                         $input_params{'hash_parent_base'} ||= $parentrefname;
 664                 } else {
 665                         $input_params{'hash_parent'} ||= $parentrefname;
 666                 }
 667         }
 668
 669         # for the snapshot action, we allow URLs in the form
 670         # $project/snapshot/$hash.ext
 671         # where .ext determines the snapshot and gets removed from the
 672         # passed $refname to provide the $hash.
 673         #
 674         # To be able to tell that $refname includes the format extension, we
 675         # require the following two conditions to be satisfied:
 676         # - the hash input parameter MUST have been set from the $refname part
 677         #   of the URL (i.e. they must be equal)
 678         # - the snapshot format MUST NOT have been defined already (e.g. from
 679         #   CGI parameter sf)
 680         # It's also useless to try any matching unless $refname has a dot,
 681         # so we check for that too
 682         if (defined $input_params{'action'} &&
 683                 $input_params{'action'} eq 'snapshot' &&
 684                 defined $refname && index($refname, '.') != -1 &&
 685                 $refname eq $input_params{'hash'} &&
 686                 !defined $input_params{'snapshot_format'}) {
 687                 # We loop over the known snapshot formats, checking for
 688                 # extensions. Allowed extensions are both the defined suffix
 689                 # (which includes the initial dot already) and the snapshot
 690                 # format key itself, with a prepended dot
 691                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 692                         my $hash = $refname;
 693                         my $sfx;
 694                         $hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//;
 695                         next unless $sfx = $1;
 696                         # a valid suffix was found, so set the snapshot format
 697                         # and reset the hash parameter
 698                         $input_params{'snapshot_format'} = $fmt;
 699                         $input_params{'hash'} = $hash;
 700                         # we also set the format suffix to the one requested
 701                         # in the URL: this way a request for e.g. .tgz returns
 702                         # a .tgz instead of a .tar.gz
 703                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 704                         last;
 705                 }
 706         }
 707 }
 708 evaluate_path_info();
 709
 710 our $action = $input_params{'action'};
 711 if (defined $action) {
 712         if (!validate_action($action)) {
 713                 die_error(400, "Invalid action parameter");
 714         }
 715 }
 716
 717 # parameters which are pathnames
 718 our $project = $input_params{'project'};
 719 if (defined $project) {
 720         if (!validate_project($project)) {
 721                 undef $project;
 722                 die_error(404, "No such project");
 723         }
 724 }
 725
 726 our $file_name = $input_params{'file_name'};
 727 if (defined $file_name) {
 728         if (!validate_pathname($file_name)) {
 729                 die_error(400, "Invalid file parameter");
 730         }
 731 }
 732
 733 our $file_parent = $input_params{'file_parent'};
 734 if (defined $file_parent) {
 735         if (!validate_pathname($file_parent)) {
 736                 die_error(400, "Invalid file parent parameter");
 737         }
 738 }
 739
 740 # parameters which are refnames
 741 our $hash = $input_params{'hash'};
 742 if (defined $hash) {
 743         if (!validate_refname($hash)) {
 744                 die_error(400, "Invalid hash parameter");
 745         }
 746 }
 747
 748 our $hash_parent = $input_params{'hash_parent'};
 749 if (defined $hash_parent) {
 750         if (!validate_refname($hash_parent)) {
 751                 die_error(400, "Invalid hash parent parameter");
 752         }
 753 }
 754
 755 our $hash_base = $input_params{'hash_base'};
 756 if (defined $hash_base) {
 757         if (!validate_refname($hash_base)) {
 758                 die_error(400, "Invalid hash base parameter");
 759         }
 760 }
 761
 762 our @extra_options = @{$input_params{'extra_options'}};
 763 # @extra_options is always defined, since it can only be (currently) set from
 764 # CGI, and $cgi->param() returns the empty array in array context if the param
 765 # is not set
 766 foreach my $opt (@extra_options) {
 767         if (not exists $allowed_options{$opt}) {
 768                 die_error(400, "Invalid option parameter");
 769         }
 770         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 771                 die_error(400, "Invalid option parameter for this action");
 772         }
 773 }
 774
 775 our $hash_parent_base = $input_params{'hash_parent_base'};
 776 if (defined $hash_parent_base) {
 777         if (!validate_refname($hash_parent_base)) {
 778                 die_error(400, "Invalid hash parent base parameter");
 779         }
 780 }
 781
 782 # other parameters
 783 our $page = $input_params{'page'};
 784 if (defined $page) {
 785         if ($page =~ m/[^0-9]/) {
 786                 die_error(400, "Invalid page parameter");
 787         }
 788 }
 789
 790 our $searchtype = $input_params{'searchtype'};
 791 if (defined $searchtype) {
 792         if ($searchtype =~ m/[^a-z]/) {
 793                 die_error(400, "Invalid searchtype parameter");
 794         }
 795 }
 796
 797 our $search_use_regexp = $input_params{'search_use_regexp'};
 798
 799 our $searchtext = $input_params{'searchtext'};
 800 our $search_regexp;
 801 if (defined $searchtext) {
 802         if (length($searchtext) < 2) {
 803                 die_error(403, "At least two characters are required for search parameter");
 804         }
 805         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 806 }
 807
 808 # path to the current git repository
 809 our $git_dir;
 810 $git_dir = "$projectroot/$project" if $project;
 811
 812 # list of supported snapshot formats
 813 our @snapshot_fmts = gitweb_get_feature('snapshot');
 814 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 815
 816 # dispatch
 817 if (!defined $action) {
 818         if (defined $hash) {
 819                 $action = git_get_type($hash);
 820         } elsif (defined $hash_base && defined $file_name) {
 821                 $action = git_get_type("$hash_base:$file_name");
 822         } elsif (defined $project) {
 823                 $action = 'summary';
 824         } else {
 825                 $action = 'project_list';
 826         }
 827 }
 828 if (!defined($actions{$action})) {
 829         die_error(400, "Unknown action");
 830 }
 831 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 832     !$project) {
 833         die_error(400, "Project needed");
 834 }
 835 $actions{$action}->();
 836 exit;
 837
 838 ## ======================================================================
 839 ## action links
 840
 841 sub href (%) {
 842         my %params = @_;
 843         # default is to use -absolute url() i.e. $my_uri
 844         my $href = $params{-full} ? $my_url : $my_uri;
 845
 846         $params{'project'} = $project unless exists $params{'project'};
 847
 848         if ($params{-replay}) {
 849                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 850                         if (!exists $params{$name}) {
 851                                 $params{$name} = $input_params{$name};
 852                         }
 853                 }
 854         }
 855
 856         my $use_pathinfo = gitweb_check_feature('pathinfo');
 857         if ($use_pathinfo and defined $params{'project'}) {
 858                 # try to put as many parameters as possible in PATH_INFO:
 859                 #   - project name
 860                 #   - action
 861                 #   - hash_parent or hash_parent_base:/file_parent
 862                 #   - hash or hash_base:/filename
 863                 #   - the snapshot_format as an appropriate suffix
 864
 865                 # When the script is the root DirectoryIndex for the domain,
 866                 # $href here would be something like http://gitweb.example.com/
 867                 # Thus, we strip any trailing / from $href, to spare us double
 868                 # slashes in the final URL
 869                 $href =~ s,/$,,;
 870
 871                 # Then add the project name, if present
 872                 $href .= "/".esc_url($params{'project'});
 873                 delete $params{'project'};
 874
 875                 # since we destructively absorb parameters, we keep this
 876                 # boolean that remembers if we're handling a snapshot
 877                 my $is_snapshot = $params{'action'} eq 'snapshot';
 878
 879                 # Summary just uses the project path URL, any other action is
 880                 # added to the URL
 881                 if (defined $params{'action'}) {
 882                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 883                         delete $params{'action'};
 884                 }
 885
 886                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 887                 # stripping nonexistent or useless pieces
 888                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 889                         || $params{'hash_parent'} || $params{'hash'});
 890                 if (defined $params{'hash_base'}) {
 891                         if (defined $params{'hash_parent_base'}) {
 892                                 $href .= esc_url($params{'hash_parent_base'});
 893                                 # skip the file_parent if it's the same as the file_name
 894                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 895                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 896                                         $href .= ":/".esc_url($params{'file_parent'});
 897                                         delete $params{'file_parent'};
 898                                 }
 899                                 $href .= "..";
 900                                 delete $params{'hash_parent'};
 901                                 delete $params{'hash_parent_base'};
 902                         } elsif (defined $params{'hash_parent'}) {
 903                                 $href .= esc_url($params{'hash_parent'}). "..";
 904                                 delete $params{'hash_parent'};
 905                         }
 906
 907                         $href .= esc_url($params{'hash_base'});
 908                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 909                                 $href .= ":/".esc_url($params{'file_name'});
 910                                 delete $params{'file_name'};
 911                         }
 912                         delete $params{'hash'};
 913                         delete $params{'hash_base'};
 914                 } elsif (defined $params{'hash'}) {
 915                         $href .= esc_url($params{'hash'});
 916                         delete $params{'hash'};
 917                 }
 918
 919                 # If the action was a snapshot, we can absorb the
 920                 # snapshot_format parameter too
 921                 if ($is_snapshot) {
 922                         my $fmt = $params{'snapshot_format'};
 923                         # snapshot_format should always be defined when href()
 924                         # is called, but just in case some code forgets, we
 925                         # fall back to the default
 926                         $fmt ||= $snapshot_fmts[0];
 927                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 928                         delete $params{'snapshot_format'};
 929                 }
 930         }
 931
 932         # now encode the parameters explicitly
 933         my @result = ();
 934         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 935                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 936                 if (defined $params{$name}) {
 937                         if (ref($params{$name}) eq "ARRAY") {
 938                                 foreach my $par (@{$params{$name}}) {
 939                                         push @result, $symbol . "=" . esc_param($par);
 940                                 }
 941                         } else {
 942                                 push @result, $symbol . "=" . esc_param($params{$name});
 943                         }
 944                 }
 945         }
 946         $href .= "?" . join(';', @result) if scalar @result;
 947
 948         return $href;
 949 }
 950
 951
 952 ## ======================================================================
 953 ## validation, quoting/unquoting and escaping
 954
 955 sub validate_action {
 956         my $input = shift || return undef;
 957         return undef unless exists $actions{$input};
 958         return $input;
 959 }
 960
 961 sub validate_project {
 962         my $input = shift || return undef;
 963         if (!validate_pathname($input) ||
 964                 !(-d "$projectroot/$input") ||
 965                 !check_export_ok("$projectroot/$input") ||
 966                 ($strict_export && !project_in_list($input))) {
 967                 return undef;
 968         } else {
 969                 return $input;
 970         }
 971 }
 972
 973 sub validate_pathname {
 974         my $input = shift || return undef;
 975
 976         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 977         # at the beginning, at the end, and between slashes.
 978         # also this catches doubled slashes
 979         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 980                 return undef;
 981         }
 982         # no null characters
 983         if ($input =~ m!\0!) {
 984                 return undef;
 985         }
 986         return $input;
 987 }
 988
 989 sub validate_refname {
 990         my $input = shift || return undef;
 991
 992         # textual hashes are O.K.
 993         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 994                 return $input;
 995         }
 996         # it must be correct pathname
 997         $input = validate_pathname($input)
 998                 or return undef;
 999         # restrictions on ref name according to git-check-ref-format
1000         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1001                 return undef;
1002         }
1003         return $input;
1004 }
1005
1006 # decode sequences of octets in utf8 into Perl's internal form,
1007 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1008 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1009 sub to_utf8 {
1010         my $str = shift;
1011         if (utf8::valid($str)) {
1012                 utf8::decode($str);
1013                 return $str;
1014         } else {
1015                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1016         }
1017 }
1018
1019 # quote unsafe chars, but keep the slash, even when it's not
1020 # correct, but quoted slashes look too horrible in bookmarks
1021 sub esc_param {
1022         my $str = shift;
1023         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1024         $str =~ s/\+/%2B/g;
1025         $str =~ s/ /\+/g;
1026         return $str;
1027 }
1028
1029 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1030 sub esc_url {
1031         my $str = shift;
1032         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1033         $str =~ s/\+/%2B/g;
1034         $str =~ s/ /\+/g;
1035         return $str;
1036 }
1037
1038 # replace invalid utf8 character with SUBSTITUTION sequence
1039 sub esc_html ($;%) {
1040         my $str = shift;
1041         my %opts = @_;
1042
1043         $str = to_utf8($str);
1044         $str = $cgi->escapeHTML($str);
1045         if ($opts{'-nbsp'}) {
1046                 $str =~ s/ /&nbsp;/g;
1047         }
1048         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1049         return $str;
1050 }
1051
1052 # quote control characters and escape filename to HTML
1053 sub esc_path {
1054         my $str = shift;
1055         my %opts = @_;
1056
1057         $str = to_utf8($str);
1058         $str = $cgi->escapeHTML($str);
1059         if ($opts{'-nbsp'}) {
1060                 $str =~ s/ /&nbsp;/g;
1061         }
1062         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1063         return $str;
1064 }
1065
1066 # Make control characters "printable", using character escape codes (CEC)
1067 sub quot_cec {
1068         my $cntrl = shift;
1069         my %opts = @_;
1070         my %es = ( # character escape codes, aka escape sequences
1071                 "\t" => '\t',   # tab            (HT)
1072                 "\n" => '\n',   # line feed      (LF)
1073                 "\r" => '\r',   # carrige return (CR)
1074                 "\f" => '\f',   # form feed      (FF)
1075                 "\b" => '\b',   # backspace      (BS)
1076                 "\a" => '\a',   # alarm (bell)   (BEL)
1077                 "\e" => '\e',   # escape         (ESC)
1078                 "\013" => '\v', # vertical tab   (VT)
1079                 "\000" => '\0', # nul character  (NUL)
1080         );
1081         my $chr = ( (exists $es{$cntrl})
1082                     ? $es{$cntrl}
1083                     : sprintf('\%2x', ord($cntrl)) );
1084         if ($opts{-nohtml}) {
1085                 return $chr;
1086         } else {
1087                 return "<span class=\"cntrl\">$chr</span>";
1088         }
1089 }
1090
1091 # Alternatively use unicode control pictures codepoints,
1092 # Unicode "printable representation" (PR)
1093 sub quot_upr {
1094         my $cntrl = shift;
1095         my %opts = @_;
1096
1097         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1098         if ($opts{-nohtml}) {
1099                 return $chr;
1100         } else {
1101                 return "<span class=\"cntrl\">$chr</span>";
1102         }
1103 }
1104
1105 # git may return quoted and escaped filenames
1106 sub unquote {
1107         my $str = shift;
1108
1109         sub unq {
1110                 my $seq = shift;
1111                 my %es = ( # character escape codes, aka escape sequences
1112                         't' => "\t",   # tab            (HT, TAB)
1113                         'n' => "\n",   # newline        (NL)
1114                         'r' => "\r",   # return         (CR)
1115                         'f' => "\f",   # form feed      (FF)
1116                         'b' => "\b",   # backspace      (BS)
1117                         'a' => "\a",   # alarm (bell)   (BEL)
1118                         'e' => "\e",   # escape         (ESC)
1119                         'v' => "\013", # vertical tab   (VT)
1120                 );
1121
1122                 if ($seq =~ m/^[0-7]{1,3}$/) {
1123                         # octal char sequence
1124                         return chr(oct($seq));
1125                 } elsif (exists $es{$seq}) {
1126                         # C escape sequence, aka character escape code
1127                         return $es{$seq};
1128                 }
1129                 # quoted ordinary character
1130                 return $seq;
1131         }
1132
1133         if ($str =~ m/^"(.*)"$/) {
1134                 # needs unquoting
1135                 $str = $1;
1136                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1137         }
1138         return $str;
1139 }
1140
1141 # escape tabs (convert tabs to spaces)
1142 sub untabify {
1143         my $line = shift;
1144
1145         while ((my $pos = index($line, "\t")) != -1) {
1146                 if (my $count = (8 - ($pos % 8))) {
1147                         my $spaces = ' ' x $count;
1148                         $line =~ s/\t/$spaces/;
1149                 }
1150         }
1151
1152         return $line;
1153 }
1154
1155 sub project_in_list {
1156         my $project = shift;
1157         my @list = git_get_projects_list();
1158         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1159 }
1160
1161 ## ----------------------------------------------------------------------
1162 ## HTML aware string manipulation
1163
1164 # Try to chop given string on a word boundary between position
1165 # $len and $len+$add_len. If there is no word boundary there,
1166 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1167 # (marking chopped part) would be longer than given string.
1168 sub chop_str {
1169         my $str = shift;
1170         my $len = shift;
1171         my $add_len = shift || 10;
1172         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1173
1174         # Make sure perl knows it is utf8 encoded so we don't
1175         # cut in the middle of a utf8 multibyte char.
1176         $str = to_utf8($str);
1177
1178         # allow only $len chars, but don't cut a word if it would fit in $add_len
1179         # if it doesn't fit, cut it if it's still longer than the dots we would add
1180         # remove chopped character entities entirely
1181
1182         # when chopping in the middle, distribute $len into left and right part
1183         # return early if chopping wouldn't make string shorter
1184         if ($where eq 'center') {
1185                 return $str if ($len + 5 >= length($str)); # filler is length 5
1186                 $len = int($len/2);
1187         } else {
1188                 return $str if ($len + 4 >= length($str)); # filler is length 4
1189         }
1190
1191         # regexps: ending and beginning with word part up to $add_len
1192         my $endre = qr/.{$len}\w{0,$add_len}/;
1193         my $begre = qr/\w{0,$add_len}.{$len}/;
1194
1195         if ($where eq 'left') {
1196                 $str =~ m/^(.*?)($begre)$/;
1197                 my ($lead, $body) = ($1, $2);
1198                 if (length($lead) > 4) {
1199                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1200                         $lead = " ...";
1201                 }
1202                 return "$lead$body";
1203
1204         } elsif ($where eq 'center') {
1205                 $str =~ m/^($endre)(.*)$/;
1206                 my ($left, $str)  = ($1, $2);
1207                 $str =~ m/^(.*?)($begre)$/;
1208                 my ($mid, $right) = ($1, $2);
1209                 if (length($mid) > 5) {
1210                         $left  =~ s/&[^;]*$//;
1211                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1212                         $mid = " ... ";
1213                 }
1214                 return "$left$mid$right";
1215
1216         } else {
1217                 $str =~ m/^($endre)(.*)$/;
1218                 my $body = $1;
1219                 my $tail = $2;
1220                 if (length($tail) > 4) {
1221                         $body =~ s/&[^;]*$//;
1222                         $tail = "... ";
1223                 }
1224                 return "$body$tail";
1225         }
1226 }
1227
1228 # takes the same arguments as chop_str, but also wraps a <span> around the
1229 # result with a title attribute if it does get chopped. Additionally, the
1230 # string is HTML-escaped.
1231 sub chop_and_escape_str {
1232         my ($str) = @_;
1233
1234         my $chopped = chop_str(@_);
1235         if ($chopped eq $str) {
1236                 return esc_html($chopped);
1237         } else {
1238                 $str =~ s/([[:cntrl:]])/?/g;
1239                 return $cgi->span({-title=>$str}, esc_html($chopped));
1240         }
1241 }
1242
1243 ## ----------------------------------------------------------------------
1244 ## functions returning short strings
1245
1246 # CSS class for given age value (in seconds)
1247 sub age_class {
1248         my $age = shift;
1249
1250         if (!defined $age) {
1251                 return "noage";
1252         } elsif ($age < 60*60*2) {
1253                 return "age0";
1254         } elsif ($age < 60*60*24*2) {
1255                 return "age1";
1256         } else {
1257                 return "age2";
1258         }
1259 }
1260
1261 # convert age in seconds to "nn units ago" string
1262 sub age_string {
1263         my $age = shift;
1264         my $age_str;
1265
1266         if ($age > 60*60*24*365*2) {
1267                 $age_str = (int $age/60/60/24/365);
1268                 $age_str .= " years ago";
1269         } elsif ($age > 60*60*24*(365/12)*2) {
1270                 $age_str = int $age/60/60/24/(365/12);
1271                 $age_str .= " months ago";
1272         } elsif ($age > 60*60*24*7*2) {
1273                 $age_str = int $age/60/60/24/7;
1274                 $age_str .= " weeks ago";
1275         } elsif ($age > 60*60*24*2) {
1276                 $age_str = int $age/60/60/24;
1277                 $age_str .= " days ago";
1278         } elsif ($age > 60*60*2) {
1279                 $age_str = int $age/60/60;
1280                 $age_str .= " hours ago";
1281         } elsif ($age > 60*2) {
1282                 $age_str = int $age/60;
1283                 $age_str .= " min ago";
1284         } elsif ($age > 2) {
1285                 $age_str = int $age;
1286                 $age_str .= " sec ago";
1287         } else {
1288                 $age_str .= " right now";
1289         }
1290         return $age_str;
1291 }
1292
1293 use constant {
1294         S_IFINVALID => 0030000,
1295         S_IFGITLINK => 0160000,
1296 };
1297
1298 # submodule/subproject, a commit object reference
1299 sub S_ISGITLINK($) {
1300         my $mode = shift;
1301
1302         return (($mode & S_IFMT) == S_IFGITLINK)
1303 }
1304
1305 # convert file mode in octal to symbolic file mode string
1306 sub mode_str {
1307         my $mode = oct shift;
1308
1309         if (S_ISGITLINK($mode)) {
1310                 return 'm---------';
1311         } elsif (S_ISDIR($mode & S_IFMT)) {
1312                 return 'drwxr-xr-x';
1313         } elsif (S_ISLNK($mode)) {
1314                 return 'lrwxrwxrwx';
1315         } elsif (S_ISREG($mode)) {
1316                 # git cares only about the executable bit
1317                 if ($mode & S_IXUSR) {
1318                         return '-rwxr-xr-x';
1319                 } else {
1320                         return '-rw-r--r--';
1321                 };
1322         } else {
1323                 return '----------';
1324         }
1325 }
1326
1327 # convert file mode in octal to file type string
1328 sub file_type {
1329         my $mode = shift;
1330
1331         if ($mode !~ m/^[0-7]+$/) {
1332                 return $mode;
1333         } else {
1334                 $mode = oct $mode;
1335         }
1336
1337         if (S_ISGITLINK($mode)) {
1338                 return "submodule";
1339         } elsif (S_ISDIR($mode & S_IFMT)) {
1340                 return "directory";
1341         } elsif (S_ISLNK($mode)) {
1342                 return "symlink";
1343         } elsif (S_ISREG($mode)) {
1344                 return "file";
1345         } else {
1346                 return "unknown";
1347         }
1348 }
1349
1350 # convert file mode in octal to file type description string
1351 sub file_type_long {
1352         my $mode = shift;
1353
1354         if ($mode !~ m/^[0-7]+$/) {
1355                 return $mode;
1356         } else {
1357                 $mode = oct $mode;
1358         }
1359
1360         if (S_ISGITLINK($mode)) {
1361                 return "submodule";
1362         } elsif (S_ISDIR($mode & S_IFMT)) {
1363                 return "directory";
1364         } elsif (S_ISLNK($mode)) {
1365                 return "symlink";
1366         } elsif (S_ISREG($mode)) {
1367                 if ($mode & S_IXUSR) {
1368                         return "executable";
1369                 } else {
1370                         return "file";
1371                 };
1372         } else {
1373                 return "unknown";
1374         }
1375 }
1376
1377
1378 ## ----------------------------------------------------------------------
1379 ## functions returning short HTML fragments, or transforming HTML fragments
1380 ## which don't belong to other sections
1381
1382 # format line of commit message.
1383 sub format_log_line_html {
1384         my $line = shift;
1385
1386         $line = esc_html($line, -nbsp=>1);
1387         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1388                 $cgi->a({-href => href(action=>"object", hash=>$1),
1389                                         -class => "text"}, $1);
1390         }eg;
1391
1392         return $line;
1393 }
1394
1395 # format marker of refs pointing to given object
1396
1397 # the destination action is chosen based on object type and current context:
1398 # - for annotated tags, we choose the tag view unless it's the current view
1399 #   already, in which case we go to shortlog view
1400 # - for other refs, we keep the current view if we're in history, shortlog or
1401 #   log view, and select shortlog otherwise
1402 sub format_ref_marker {
1403         my ($refs, $id) = @_;
1404         my $markers = '';
1405
1406         if (defined $refs->{$id}) {
1407                 foreach my $ref (@{$refs->{$id}}) {
1408                         # this code exploits the fact that non-lightweight tags are the
1409                         # only indirect objects, and that they are the only objects for which
1410                         # we want to use tag instead of shortlog as action
1411                         my ($type, $name) = qw();
1412                         my $indirect = ($ref =~ s/\^\{\}$//);
1413                         # e.g. tags/v2.6.11 or heads/next
1414                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1415                                 $type = $1;
1416                                 $name = $2;
1417                         } else {
1418                                 $type = "ref";
1419                                 $name = $ref;
1420                         }
1421
1422                         my $class = $type;
1423                         $class .= " indirect" if $indirect;
1424
1425                         my $dest_action = "shortlog";
1426
1427                         if ($indirect) {
1428                                 $dest_action = "tag" unless $action eq "tag";
1429                         } elsif ($action =~ /^(history|(short)?log)$/) {
1430                                 $dest_action = $action;
1431                         }
1432
1433                         my $dest = "";
1434                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1435                         $dest .= $ref;
1436
1437                         my $link = $cgi->a({
1438                                 -href => href(
1439                                         action=>$dest_action,
1440                                         hash=>$dest
1441                                 )}, $name);
1442
1443                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1444                                 $link . "</span>";
1445                 }
1446         }
1447
1448         if ($markers) {
1449                 return ' <span class="refs">'. $markers . '</span>';
1450         } else {
1451                 return "";
1452         }
1453 }
1454
1455 # format, perhaps shortened and with markers, title line
1456 sub format_subject_html {
1457         my ($long, $short, $href, $extra) = @_;
1458         $extra = '' unless defined($extra);
1459
1460         if (length($short) < length($long)) {
1461                 return $cgi->a({-href => $href, -class => "list subject",
1462                                 -title => to_utf8($long)},
1463                        esc_html($short) . $extra);
1464         } else {
1465                 return $cgi->a({-href => $href, -class => "list subject"},
1466                        esc_html($long)  . $extra);
1467         }
1468 }
1469
1470 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1471 sub format_git_diff_header_line {
1472         my $line = shift;
1473         my $diffinfo = shift;
1474         my ($from, $to) = @_;
1475
1476         if ($diffinfo->{'nparents'}) {
1477                 # combined diff
1478                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1479                 if ($to->{'href'}) {
1480                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1481                                          esc_path($to->{'file'}));
1482                 } else { # file was deleted (no href)
1483                         $line .= esc_path($to->{'file'});
1484                 }
1485         } else {
1486                 # "ordinary" diff
1487                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1488                 if ($from->{'href'}) {
1489                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1490                                          'a/' . esc_path($from->{'file'}));
1491                 } else { # file was added (no href)
1492                         $line .= 'a/' . esc_path($from->{'file'});
1493                 }
1494                 $line .= ' ';
1495                 if ($to->{'href'}) {
1496                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1497                                          'b/' . esc_path($to->{'file'}));
1498                 } else { # file was deleted
1499                         $line .= 'b/' . esc_path($to->{'file'});
1500                 }
1501         }
1502
1503         return "<div class=\"diff header\">$line</div>\n";
1504 }
1505
1506 # format extended diff header line, before patch itself
1507 sub format_extended_diff_header_line {
1508         my $line = shift;
1509         my $diffinfo = shift;
1510         my ($from, $to) = @_;
1511
1512         # match <path>
1513         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1514                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1515                                        esc_path($from->{'file'}));
1516         }
1517         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1518                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1519                                  esc_path($to->{'file'}));
1520         }
1521         # match single <mode>
1522         if ($line =~ m/\s(\d{6})$/) {
1523                 $line .= '<span class="info"> (' .
1524                          file_type_long($1) .
1525                          ')</span>';
1526         }
1527         # match <hash>
1528         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1529                 # can match only for combined diff
1530                 $line = 'index ';
1531                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1532                         if ($from->{'href'}[$i]) {
1533                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1534                                                   -class=>"hash"},
1535                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1536                         } else {
1537                                 $line .= '0' x 7;
1538                         }
1539                         # separator
1540                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1541                 }
1542                 $line .= '..';
1543                 if ($to->{'href'}) {
1544                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1545                                          substr($diffinfo->{'to_id'},0,7));
1546                 } else {
1547                         $line .= '0' x 7;
1548                 }
1549
1550         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1551                 # can match only for ordinary diff
1552                 my ($from_link, $to_link);
1553                 if ($from->{'href'}) {
1554                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1555                                              substr($diffinfo->{'from_id'},0,7));
1556                 } else {
1557                         $from_link = '0' x 7;
1558                 }
1559                 if ($to->{'href'}) {
1560                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1561                                            substr($diffinfo->{'to_id'},0,7));
1562                 } else {
1563                         $to_link = '0' x 7;
1564                 }
1565                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1566                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1567         }
1568
1569         return $line . "<br/>\n";
1570 }
1571
1572 # format from-file/to-file diff header
1573 sub format_diff_from_to_header {
1574         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1575         my $line;
1576         my $result = '';
1577
1578         $line = $from_line;
1579         #assert($line =~ m/^---/) if DEBUG;
1580         # no extra formatting for "^--- /dev/null"
1581         if (! $diffinfo->{'nparents'}) {
1582                 # ordinary (single parent) diff
1583                 if ($line =~ m!^--- "?a/!) {
1584                         if ($from->{'href'}) {
1585                                 $line = '--- a/' .
1586                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1587                                                 esc_path($from->{'file'}));
1588                         } else {
1589                                 $line = '--- a/' .
1590                                         esc_path($from->{'file'});
1591                         }
1592                 }
1593                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1594
1595         } else {
1596                 # combined diff (merge commit)
1597                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1598                         if ($from->{'href'}[$i]) {
1599                                 $line = '--- ' .
1600                                         $cgi->a({-href=>href(action=>"blobdiff",
1601                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1602                                                              hash_parent_base=>$parents[$i],
1603                                                              file_parent=>$from->{'file'}[$i],
1604                                                              hash=>$diffinfo->{'to_id'},
1605                                                              hash_base=>$hash,
1606                                                              file_name=>$to->{'file'}),
1607                                                  -class=>"path",
1608                                                  -title=>"diff" . ($i+1)},
1609                                                 $i+1) .
1610                                         '/' .
1611                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1612                                                 esc_path($from->{'file'}[$i]));
1613                         } else {
1614                                 $line = '--- /dev/null';
1615                         }
1616                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1617                 }
1618         }
1619
1620         $line = $to_line;
1621         #assert($line =~ m/^\+\+\+/) if DEBUG;
1622         # no extra formatting for "^+++ /dev/null"
1623         if ($line =~ m!^\+\+\+ "?b/!) {
1624                 if ($to->{'href'}) {
1625                         $line = '+++ b/' .
1626                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1627                                         esc_path($to->{'file'}));
1628                 } else {
1629                         $line = '+++ b/' .
1630                                 esc_path($to->{'file'});
1631                 }
1632         }
1633         $result .= qq!<div class="diff to_file">$line</div>\n!;
1634
1635         return $result;
1636 }
1637
1638 # create note for patch simplified by combined diff
1639 sub format_diff_cc_simplified {
1640         my ($diffinfo, @parents) = @_;
1641         my $result = '';
1642
1643         $result .= "<div class=\"diff header\">" .
1644                    "diff --cc ";
1645         if (!is_deleted($diffinfo)) {
1646                 $result .= $cgi->a({-href => href(action=>"blob",
1647                                                   hash_base=>$hash,
1648                                                   hash=>$diffinfo->{'to_id'},
1649                                                   file_name=>$diffinfo->{'to_file'}),
1650                                     -class => "path"},
1651                                    esc_path($diffinfo->{'to_file'}));
1652         } else {
1653                 $result .= esc_path($diffinfo->{'to_file'});
1654         }
1655         $result .= "</div>\n" . # class="diff header"
1656                    "<div class=\"diff nodifferences\">" .
1657                    "Simple merge" .
1658                    "</div>\n"; # class="diff nodifferences"
1659
1660         return $result;
1661 }
1662
1663 # format patch (diff) line (not to be used for diff headers)
1664 sub format_diff_line {
1665         my $line = shift;
1666         my ($from, $to) = @_;
1667         my $diff_class = "";
1668
1669         chomp $line;
1670
1671         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1672                 # combined diff
1673                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1674                 if ($line =~ m/^\@{3}/) {
1675                         $diff_class = " chunk_header";
1676                 } elsif ($line =~ m/^\\/) {
1677                         $diff_class = " incomplete";
1678                 } elsif ($prefix =~ tr/+/+/) {
1679                         $diff_class = " add";
1680                 } elsif ($prefix =~ tr/-/-/) {
1681                         $diff_class = " rem";
1682                 }
1683         } else {
1684                 # assume ordinary diff
1685                 my $char = substr($line, 0, 1);
1686                 if ($char eq '+') {
1687                         $diff_class = " add";
1688                 } elsif ($char eq '-') {
1689                         $diff_class = " rem";
1690                 } elsif ($char eq '@') {
1691                         $diff_class = " chunk_header";
1692                 } elsif ($char eq "\\") {
1693                         $diff_class = " incomplete";
1694                 }
1695         }
1696         $line = untabify($line);
1697         if ($from && $to && $line =~ m/^\@{2} /) {
1698                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1699                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1700
1701                 $from_lines = 0 unless defined $from_lines;
1702                 $to_lines   = 0 unless defined $to_lines;
1703
1704                 if ($from->{'href'}) {
1705                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1706                                              -class=>"list"}, $from_text);
1707                 }
1708                 if ($to->{'href'}) {
1709                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1710                                              -class=>"list"}, $to_text);
1711                 }
1712                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1713                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1714                 return "<div class=\"diff$diff_class\">$line</div>\n";
1715         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1716                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1717                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1718
1719                 @from_text = split(' ', $ranges);
1720                 for (my $i = 0; $i < @from_text; ++$i) {
1721                         ($from_start[$i], $from_nlines[$i]) =
1722                                 (split(',', substr($from_text[$i], 1)), 0);
1723                 }
1724
1725                 $to_text   = pop @from_text;
1726                 $to_start  = pop @from_start;
1727                 $to_nlines = pop @from_nlines;
1728
1729                 $line = "<span class=\"chunk_info\">$prefix ";
1730                 for (my $i = 0; $i < @from_text; ++$i) {
1731                         if ($from->{'href'}[$i]) {
1732                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1733                                                   -class=>"list"}, $from_text[$i]);
1734                         } else {
1735                                 $line .= $from_text[$i];
1736                         }
1737                         $line .= " ";
1738                 }
1739                 if ($to->{'href'}) {
1740                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1741                                           -class=>"list"}, $to_text);
1742                 } else {
1743                         $line .= $to_text;
1744                 }
1745                 $line .= " $prefix</span>" .
1746                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1747                 return "<div class=\"diff$diff_class\">$line</div>\n";
1748         }
1749         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1750 }
1751
1752 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1753 # linked.  Pass the hash of the tree/commit to snapshot.
1754 sub format_snapshot_links {
1755         my ($hash) = @_;
1756         my $num_fmts = @snapshot_fmts;
1757         if ($num_fmts > 1) {
1758                 # A parenthesized list of links bearing format names.
1759                 # e.g. "snapshot (_tar.gz_ _zip_)"
1760                 return "snapshot (" . join(' ', map
1761                         $cgi->a({
1762                                 -href => href(
1763                                         action=>"snapshot",
1764                                         hash=>$hash,
1765                                         snapshot_format=>$_
1766                                 )
1767                         }, $known_snapshot_formats{$_}{'display'})
1768                 , @snapshot_fmts) . ")";
1769         } elsif ($num_fmts == 1) {
1770                 # A single "snapshot" link whose tooltip bears the format name.
1771                 # i.e. "_snapshot_"
1772                 my ($fmt) = @snapshot_fmts;
1773                 return
1774                         $cgi->a({
1775                                 -href => href(
1776                                         action=>"snapshot",
1777                                         hash=>$hash,
1778                                         snapshot_format=>$fmt
1779                                 ),
1780                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1781                         }, "snapshot");
1782         } else { # $num_fmts == 0
1783                 return undef;
1784         }
1785 }
1786
1787 ## ......................................................................
1788 ## functions returning values to be passed, perhaps after some
1789 ## transformation, to other functions; e.g. returning arguments to href()
1790
1791 # returns hash to be passed to href to generate gitweb URL
1792 # in -title key it returns description of link
1793 sub get_feed_info {
1794         my $format = shift || 'Atom';
1795         my %res = (action => lc($format));
1796
1797         # feed links are possible only for project views
1798         return unless (defined $project);
1799         # some views should link to OPML, or to generic project feed,
1800         # or don't have specific feed yet (so they should use generic)
1801         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1802
1803         my $branch;
1804         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1805         # from tag links; this also makes possible to detect branch links
1806         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1807             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1808                 $branch = $1;
1809         }
1810         # find log type for feed description (title)
1811         my $type = 'log';
1812         if (defined $file_name) {
1813                 $type  = "history of $file_name";
1814                 $type .= "/" if ($action eq 'tree');
1815                 $type .= " on '$branch'" if (defined $branch);
1816         } else {
1817                 $type = "log of $branch" if (defined $branch);
1818         }
1819
1820         $res{-title} = $type;
1821         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1822         $res{'file_name'} = $file_name;
1823
1824         return %res;
1825 }
1826
1827 ## ----------------------------------------------------------------------
1828 ## git utility subroutines, invoking git commands
1829
1830 # returns path to the core git executable and the --git-dir parameter as list
1831 sub git_cmd {
1832         return $GIT, '--git-dir='.$git_dir;
1833 }
1834
1835 # quote the given arguments for passing them to the shell
1836 # quote_command("command", "arg 1", "arg with ' and ! characters")
1837 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1838 # Try to avoid using this function wherever possible.
1839 sub quote_command {
1840         return join(' ',
1841                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1842 }
1843
1844 # get HEAD ref of given project as hash
1845 sub git_get_head_hash {
1846         my $project = shift;
1847         my $o_git_dir = $git_dir;
1848         my $retval = undef;
1849         $git_dir = "$projectroot/$project";
1850         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1851                 my $head = <$fd>;
1852                 close $fd;
1853                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1854                         $retval = $1;
1855                 }
1856         }
1857         if (defined $o_git_dir) {
1858                 $git_dir = $o_git_dir;
1859         }
1860         return $retval;
1861 }
1862
1863 # get type of given object
1864 sub git_get_type {
1865         my $hash = shift;
1866
1867         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1868         my $type = <$fd>;
1869         close $fd or return;
1870         chomp $type;
1871         return $type;
1872 }
1873
1874 # repository configuration
1875 our $config_file = '';
1876 our %config;
1877
1878 # store multiple values for single key as anonymous array reference
1879 # single values stored directly in the hash, not as [ <value> ]
1880 sub hash_set_multi {
1881         my ($hash, $key, $value) = @_;
1882
1883         if (!exists $hash->{$key}) {
1884                 $hash->{$key} = $value;
1885         } elsif (!ref $hash->{$key}) {
1886                 $hash->{$key} = [ $hash->{$key}, $value ];
1887         } else {
1888                 push @{$hash->{$key}}, $value;
1889         }
1890 }
1891
1892 # return hash of git project configuration
1893 # optionally limited to some section, e.g. 'gitweb'
1894 sub git_parse_project_config {
1895         my $section_regexp = shift;
1896         my %config;
1897
1898         local $/ = "\0";
1899
1900         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1901                 or return;
1902
1903         while (my $keyval = <$fh>) {
1904                 chomp $keyval;
1905                 my ($key, $value) = split(/\n/, $keyval, 2);
1906
1907                 hash_set_multi(\%config, $key, $value)
1908                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1909         }
1910         close $fh;
1911
1912         return %config;
1913 }
1914
1915 # convert config value to boolean: 'true' or 'false'
1916 # no value, number > 0, 'true' and 'yes' values are true
1917 # rest of values are treated as false (never as error)
1918 sub config_to_bool {
1919         my $val = shift;
1920
1921         return 1 if !defined $val;             # section.key
1922
1923         # strip leading and trailing whitespace
1924         $val =~ s/^\s+//;
1925         $val =~ s/\s+$//;
1926
1927         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1928                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1929 }
1930
1931 # convert config value to simple decimal number
1932 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1933 # to be multiplied by 1024, 1048576, or 1073741824
1934 sub config_to_int {
1935         my $val = shift;
1936
1937         # strip leading and trailing whitespace
1938         $val =~ s/^\s+//;
1939         $val =~ s/\s+$//;
1940
1941         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1942                 $unit = lc($unit);
1943                 # unknown unit is treated as 1
1944                 return $num * ($unit eq 'g' ? 1073741824 :
1945                                $unit eq 'm' ?    1048576 :
1946                                $unit eq 'k' ?       1024 : 1);
1947         }
1948         return $val;
1949 }
1950
1951 # convert config value to array reference, if needed
1952 sub config_to_multi {
1953         my $val = shift;
1954
1955         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1956 }
1957
1958 sub git_get_project_config {
1959         my ($key, $type) = @_;
1960
1961         # key sanity check
1962         return unless ($key);
1963         $key =~ s/^gitweb\.//;
1964         return if ($key =~ m/\W/);
1965
1966         # type sanity check
1967         if (defined $type) {
1968                 $type =~ s/^--//;
1969                 $type = undef
1970                         unless ($type eq 'bool' || $type eq 'int');
1971         }
1972
1973         # get config
1974         if (!defined $config_file ||
1975             $config_file ne "$git_dir/config") {
1976                 %config = git_parse_project_config('gitweb');
1977                 $config_file = "$git_dir/config";
1978         }
1979
1980         # check if config variable (key) exists
1981         return unless exists $config{"gitweb.$key"};
1982
1983         # ensure given type
1984         if (!defined $type) {
1985                 return $config{"gitweb.$key"};
1986         } elsif ($type eq 'bool') {
1987                 # backward compatibility: 'git config --bool' returns true/false
1988                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1989         } elsif ($type eq 'int') {
1990                 return config_to_int($config{"gitweb.$key"});
1991         }
1992         return $config{"gitweb.$key"};
1993 }
1994
1995 # get hash of given path at given ref
1996 sub git_get_hash_by_path {
1997         my $base = shift;
1998         my $path = shift || return undef;
1999         my $type = shift;
2000
2001         $path =~ s,/+$,,;
2002
2003         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2004                 or die_error(500, "Open git-ls-tree failed");
2005         my $line = <$fd>;
2006         close $fd or return undef;
2007
2008         if (!defined $line) {
2009                 # there is no tree or hash given by $path at $base
2010                 return undef;
2011         }
2012
2013         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2014         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2015         if (defined $type && $type ne $2) {
2016                 # type doesn't match
2017                 return undef;
2018         }
2019         return $3;
2020 }
2021
2022 # get path of entry with given hash at given tree-ish (ref)
2023 # used to get 'from' filename for combined diff (merge commit) for renames
2024 sub git_get_path_by_hash {
2025         my $base = shift || return;
2026         my $hash = shift || return;
2027
2028         local $/ = "\0";
2029
2030         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2031                 or return undef;
2032         while (my $line = <$fd>) {
2033                 chomp $line;
2034
2035                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2036                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2037                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2038                         close $fd;
2039                         return $1;
2040                 }
2041         }
2042         close $fd;
2043         return undef;
2044 }
2045
2046 ## ......................................................................
2047 ## git utility functions, directly accessing git repository
2048
2049 sub git_get_project_description {
2050         my $path = shift;
2051
2052         $git_dir = "$projectroot/$path";
2053         open my $fd, "$git_dir/description"
2054                 or return git_get_project_config('description');
2055         my $descr = <$fd>;
2056         close $fd;
2057         if (defined $descr) {
2058                 chomp $descr;
2059         }
2060         return $descr;
2061 }
2062
2063 sub git_get_project_ctags {
2064         my $path = shift;
2065         my $ctags = {};
2066
2067         $git_dir = "$projectroot/$path";
2068         unless (opendir D, "$git_dir/ctags") {
2069                 return $ctags;
2070         }
2071         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2072                 open CT, $_ or next;
2073                 my $val = <CT>;
2074                 chomp $val;
2075                 close CT;
2076                 my $ctag = $_; $ctag =~ s#.*/##;
2077                 $ctags->{$ctag} = $val;
2078         }
2079         closedir D;
2080         $ctags;
2081 }
2082
2083 sub git_populate_project_tagcloud {
2084         my $ctags = shift;
2085
2086         # First, merge different-cased tags; tags vote on casing
2087         my %ctags_lc;
2088         foreach (keys %$ctags) {
2089                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2090                 if (not $ctags_lc{lc $_}->{topcount}
2091                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2092                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2093                         $ctags_lc{lc $_}->{topname} = $_;
2094                 }
2095         }
2096
2097         my $cloud;
2098         if (eval { require HTML::TagCloud; 1; }) {
2099                 $cloud = HTML::TagCloud->new;
2100                 foreach (sort keys %ctags_lc) {
2101                         # Pad the title with spaces so that the cloud looks
2102                         # less crammed.
2103                         my $title = $ctags_lc{$_}->{topname};
2104                         $title =~ s/ /&nbsp;/g;
2105                         $title =~ s/^/&nbsp;/g;
2106                         $title =~ s/$/&nbsp;/g;
2107                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2108                 }
2109         } else {
2110                 $cloud = \%ctags_lc;
2111         }
2112         $cloud;
2113 }
2114
2115 sub git_show_project_tagcloud {
2116         my ($cloud, $count) = @_;
2117         print STDERR ref($cloud)."..\n";
2118         if (ref $cloud eq 'HTML::TagCloud') {
2119                 return $cloud->html_and_css($count);
2120         } else {
2121                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2122                 return '<p align="center">' . join (', ', map {
2123                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2124                 } splice(@tags, 0, $count)) . '</p>';
2125         }
2126 }
2127
2128 sub git_get_project_url_list {
2129         my $path = shift;
2130
2131         $git_dir = "$projectroot/$path";
2132         open my $fd, "$git_dir/cloneurl"
2133                 or return wantarray ?
2134                 @{ config_to_multi(git_get_project_config('url')) } :
2135                    config_to_multi(git_get_project_config('url'));
2136         my @git_project_url_list = map { chomp; $_ } <$fd>;
2137         close $fd;
2138
2139         return wantarray ? @git_project_url_list : \@git_project_url_list;
2140 }
2141
2142 sub git_get_projects_list {
2143         my ($filter) = @_;
2144         my @list;
2145
2146         $filter ||= '';
2147         $filter =~ s/\.git$//;
2148
2149         my $check_forks = gitweb_check_feature('forks');
2150
2151         if (-d $projects_list) {
2152                 # search in directory
2153                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2154                 # remove the trailing "/"
2155                 $dir =~ s!/+$!!;
2156                 my $pfxlen = length("$dir");
2157                 my $pfxdepth = ($dir =~ tr!/!!);
2158
2159                 File::Find::find({
2160                         follow_fast => 1, # follow symbolic links
2161                         follow_skip => 2, # ignore duplicates
2162                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2163                         wanted => sub {
2164                                 # skip project-list toplevel, if we get it.
2165                                 return if (m!^[/.]$!);
2166                                 # only directories can be git repositories
2167                                 return unless (-d $_);
2168                                 # don't traverse too deep (Find is super slow on os x)
2169                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2170                                         $File::Find::prune = 1;
2171                                         return;
2172                                 }
2173
2174                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2175                                 # we check related file in $projectroot
2176                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2177                                 if (check_export_ok("$projectroot/$path")) {
2178                                         push @list, { path => $path };
2179                                         $File::Find::prune = 1;
2180                                 }
2181                         },
2182                 }, "$dir");
2183
2184         } elsif (-f $projects_list) {
2185                 # read from file(url-encoded):
2186                 # 'git%2Fgit.git Linus+Torvalds'
2187                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2188                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2189                 my %paths;
2190                 open my ($fd), $projects_list or return;
2191         PROJECT:
2192                 while (my $line = <$fd>) {
2193                         chomp $line;
2194                         my ($path, $owner) = split ' ', $line;
2195                         $path = unescape($path);
2196                         $owner = unescape($owner);
2197                         if (!defined $path) {
2198                                 next;
2199                         }
2200                         if ($filter ne '') {
2201                                 # looking for forks;
2202                                 my $pfx = substr($path, 0, length($filter));
2203                                 if ($pfx ne $filter) {
2204                                         next PROJECT;
2205                                 }
2206                                 my $sfx = substr($path, length($filter));
2207                                 if ($sfx !~ /^\/.*\.git$/) {
2208                                         next PROJECT;
2209                                 }
2210                         } elsif ($check_forks) {
2211                         PATH:
2212                                 foreach my $filter (keys %paths) {
2213                                         # looking for forks;
2214                                         my $pfx = substr($path, 0, length($filter));
2215                                         if ($pfx ne $filter) {
2216                                                 next PATH;
2217                                         }
2218                                         my $sfx = substr($path, length($filter));
2219                                         if ($sfx !~ /^\/.*\.git$/) {
2220                                                 next PATH;
2221                                         }
2222                                         # is a fork, don't include it in
2223                                         # the list
2224                                         next PROJECT;
2225                                 }
2226                         }
2227                         if (check_export_ok("$projectroot/$path")) {
2228                                 my $pr = {
2229                                         path => $path,
2230                                         owner => to_utf8($owner),
2231                                 };
2232                                 push @list, $pr;
2233                                 (my $forks_path = $path) =~ s/\.git$//;
2234                                 $paths{$forks_path}++;
2235                         }
2236                 }
2237                 close $fd;
2238         }
2239         return @list;
2240 }
2241
2242 our $gitweb_project_owner = undef;
2243 sub git_get_project_list_from_file {
2244
2245         return if (defined $gitweb_project_owner);
2246
2247         $gitweb_project_owner = {};
2248         # read from file (url-encoded):
2249         # 'git%2Fgit.git Linus+Torvalds'
2250         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2251         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2252         if (-f $projects_list) {
2253                 open (my $fd , $projects_list);
2254                 while (my $line = <$fd>) {
2255                         chomp $line;
2256                         my ($pr, $ow) = split ' ', $line;
2257                         $pr = unescape($pr);
2258                         $ow = unescape($ow);
2259                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2260                 }
2261                 close $fd;
2262         }
2263 }
2264
2265 sub git_get_project_owner {
2266         my $project = shift;
2267         my $owner;
2268
2269         return undef unless $project;
2270         $git_dir = "$projectroot/$project";
2271
2272         if (!defined $gitweb_project_owner) {
2273                 git_get_project_list_from_file();
2274         }
2275
2276         if (exists $gitweb_project_owner->{$project}) {
2277                 $owner = $gitweb_project_owner->{$project};
2278         }
2279         if (!defined $owner){
2280                 $owner = git_get_project_config('owner');
2281         }
2282         if (!defined $owner) {
2283                 $owner = get_file_owner("$git_dir");
2284         }
2285
2286         return $owner;
2287 }
2288
2289 sub git_get_last_activity {
2290         my ($path) = @_;
2291         my $fd;
2292
2293         $git_dir = "$projectroot/$path";
2294         open($fd, "-|", git_cmd(), 'for-each-ref',
2295              '--format=%(committer)',
2296              '--sort=-committerdate',
2297              '--count=1',
2298              'refs/heads') or return;
2299         my $most_recent = <$fd>;
2300         close $fd or return;
2301         if (defined $most_recent &&
2302             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2303                 my $timestamp = $1;
2304                 my $age = time - $timestamp;
2305                 return ($age, age_string($age));
2306         }
2307         return (undef, undef);
2308 }
2309
2310 sub git_get_references {
2311         my $type = shift || "";
2312         my %refs;
2313         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2314         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2315         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2316                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2317                 or return;
2318
2319         while (my $line = <$fd>) {
2320                 chomp $line;
2321                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2322                         if (defined $refs{$1}) {
2323                                 push @{$refs{$1}}, $2;
2324                         } else {
2325                                 $refs{$1} = [ $2 ];
2326                         }
2327                 }
2328         }
2329         close $fd or return;
2330         return \%refs;
2331 }
2332
2333 sub git_get_rev_name_tags {
2334         my $hash = shift || return undef;
2335
2336         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2337                 or return;
2338         my $name_rev = <$fd>;
2339         close $fd;
2340
2341         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2342                 return $1;
2343         } else {
2344                 # catches also '$hash undefined' output
2345                 return undef;
2346         }
2347 }
2348
2349 ## ----------------------------------------------------------------------
2350 ## parse to hash functions
2351
2352 sub parse_date {
2353         my $epoch = shift;
2354         my $tz = shift || "-0000";
2355
2356         my %date;
2357         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2358         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2359         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2360         $date{'hour'} = $hour;
2361         $date{'minute'} = $min;
2362         $date{'mday'} = $mday;
2363         $date{'day'} = $days[$wday];
2364         $date{'month'} = $months[$mon];
2365         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2366                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2367         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2368                              $mday, $months[$mon], $hour ,$min;
2369         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2370                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2371
2372         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2373         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2374         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2375         $date{'hour_local'} = $hour;
2376         $date{'minute_local'} = $min;
2377         $date{'tz_local'} = $tz;
2378         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2379                                   1900+$year, $mon+1, $mday,
2380                                   $hour, $min, $sec, $tz);
2381         return %date;
2382 }
2383
2384 sub parse_tag {
2385         my $tag_id = shift;
2386         my %tag;
2387         my @comment;
2388
2389         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2390         $tag{'id'} = $tag_id;
2391         while (my $line = <$fd>) {
2392                 chomp $line;
2393                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2394                         $tag{'object'} = $1;
2395                 } elsif ($line =~ m/^type (.+)$/) {
2396                         $tag{'type'} = $1;
2397                 } elsif ($line =~ m/^tag (.+)$/) {
2398                         $tag{'name'} = $1;
2399                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2400                         $tag{'author'} = $1;
2401                         $tag{'epoch'} = $2;
2402                         $tag{'tz'} = $3;
2403                 } elsif ($line =~ m/--BEGIN/) {
2404                         push @comment, $line;
2405                         last;
2406                 } elsif ($line eq "") {
2407                         last;
2408                 }
2409         }
2410         push @comment, <$fd>;
2411         $tag{'comment'} = \@comment;
2412         close $fd or return;
2413         if (!defined $tag{'name'}) {
2414                 return
2415         };
2416         return %tag
2417 }
2418
2419 sub parse_commit_text {
2420         my ($commit_text, $withparents) = @_;
2421         my @commit_lines = split '\n', $commit_text;
2422         my %co;
2423
2424         pop @commit_lines; # Remove '\0'
2425
2426         if (! @commit_lines) {
2427                 return;
2428         }
2429
2430         my $header = shift @commit_lines;
2431         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2432                 return;
2433         }
2434         ($co{'id'}, my @parents) = split ' ', $header;
2435         while (my $line = shift @commit_lines) {
2436                 last if $line eq "\n";
2437                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2438                         $co{'tree'} = $1;
2439                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2440                         push @parents, $1;
2441                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2442                         $co{'author'} = $1;
2443                         $co{'author_epoch'} = $2;
2444                         $co{'author_tz'} = $3;
2445                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2446                                 $co{'author_name'}  = $1;
2447                                 $co{'author_email'} = $2;
2448                         } else {
2449                                 $co{'author_name'} = $co{'author'};
2450                         }
2451                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2452                         $co{'committer'} = $1;
2453                         $co{'committer_epoch'} = $2;
2454                         $co{'committer_tz'} = $3;
2455                         $co{'committer_name'} = $co{'committer'};
2456                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2457                                 $co{'committer_name'}  = $1;
2458                                 $co{'committer_email'} = $2;
2459                         } else {
2460                                 $co{'committer_name'} = $co{'committer'};
2461                         }
2462                 }
2463         }
2464         if (!defined $co{'tree'}) {
2465                 return;
2466         };
2467         $co{'parents'} = \@parents;
2468         $co{'parent'} = $parents[0];
2469
2470         foreach my $title (@commit_lines) {
2471                 $title =~ s/^    //;
2472                 if ($title ne "") {
2473                         $co{'title'} = chop_str($title, 80, 5);
2474                         # remove leading stuff of merges to make the interesting part visible
2475                         if (length($title) > 50) {
2476                                 $title =~ s/^Automatic //;
2477                                 $title =~ s/^merge (of|with) /Merge ... /i;
2478                                 if (length($title) > 50) {
2479                                         $title =~ s/(http|rsync):\/\///;
2480                                 }
2481                                 if (length($title) > 50) {
2482                                         $title =~ s/(master|www|rsync)\.//;
2483                                 }
2484                                 if (length($title) > 50) {
2485                                         $title =~ s/kernel.org:?//;
2486                                 }
2487                                 if (length($title) > 50) {
2488                                         $title =~ s/\/pub\/scm//;
2489                                 }
2490                         }
2491                         $co{'title_short'} = chop_str($title, 50, 5);
2492                         last;
2493                 }
2494         }
2495         if (! defined $co{'title'} || $co{'title'} eq "") {
2496                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2497         }
2498         # remove added spaces
2499         foreach my $line (@commit_lines) {
2500                 $line =~ s/^    //;
2501         }
2502         $co{'comment'} = \@commit_lines;
2503
2504         my $age = time - $co{'committer_epoch'};
2505         $co{'age'} = $age;
2506         $co{'age_string'} = age_string($age);
2507         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2508         if ($age > 60*60*24*7*2) {
2509                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2510                 $co{'age_string_age'} = $co{'age_string'};
2511         } else {
2512                 $co{'age_string_date'} = $co{'age_string'};
2513                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2514         }
2515         return %co;
2516 }
2517
2518 sub parse_commit {
2519         my ($commit_id) = @_;
2520         my %co;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--parents",
2526                 "--header",
2527                 "--max-count=1",
2528                 $commit_id,
2529                 "--",
2530                 or die_error(500, "Open git-rev-list failed");
2531         %co = parse_commit_text(<$fd>, 1);
2532         close $fd;
2533
2534         return %co;
2535 }
2536
2537 sub parse_commits {
2538         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2539         my @cos;
2540
2541         $maxcount ||= 1;
2542         $skip ||= 0;
2543
2544         local $/ = "\0";
2545
2546         open my $fd, "-|", git_cmd(), "rev-list",
2547                 "--header",
2548                 @args,
2549                 ("--max-count=" . $maxcount),
2550                 ("--skip=" . $skip),
2551                 @extra_options,
2552                 $commit_id,
2553                 "--",
2554                 ($filename ? ($filename) : ())
2555                 or die_error(500, "Open git-rev-list failed");
2556         while (my $line = <$fd>) {
2557                 my %co = parse_commit_text($line);
2558                 push @cos, \%co;
2559         }
2560         close $fd;
2561
2562         return wantarray ? @cos : \@cos;
2563 }
2564
2565 # parse line of git-diff-tree "raw" output
2566 sub parse_difftree_raw_line {
2567         my $line = shift;
2568         my %res;
2569
2570         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2571         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2572         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2573                 $res{'from_mode'} = $1;
2574                 $res{'to_mode'} = $2;
2575                 $res{'from_id'} = $3;
2576                 $res{'to_id'} = $4;
2577                 $res{'status'} = $5;
2578                 $res{'similarity'} = $6;
2579                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2580                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2581                 } else {
2582                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2583                 }
2584         }
2585         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2586         # combined diff (for merge commit)
2587         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2588                 $res{'nparents'}  = length($1);
2589                 $res{'from_mode'} = [ split(' ', $2) ];
2590                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2591                 $res{'from_id'} = [ split(' ', $3) ];
2592                 $res{'to_id'} = pop @{$res{'from_id'}};
2593                 $res{'status'} = [ split('', $4) ];
2594                 $res{'to_file'} = unquote($5);
2595         }
2596         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2597         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2598                 $res{'commit'} = $1;
2599         }
2600
2601         return wantarray ? %res : \%res;
2602 }
2603
2604 # wrapper: return parsed line of git-diff-tree "raw" output
2605 # (the argument might be raw line, or parsed info)
2606 sub parsed_difftree_line {
2607         my $line_or_ref = shift;
2608
2609         if (ref($line_or_ref) eq "HASH") {
2610                 # pre-parsed (or generated by hand)
2611                 return $line_or_ref;
2612         } else {
2613                 return parse_difftree_raw_line($line_or_ref);
2614         }
2615 }
2616
2617 # parse line of git-ls-tree output
2618 sub parse_ls_tree_line ($;%) {
2619         my $line = shift;
2620         my %opts = @_;
2621         my %res;
2622
2623         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2624         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2625
2626         $res{'mode'} = $1;
2627         $res{'type'} = $2;
2628         $res{'hash'} = $3;
2629         if ($opts{'-z'}) {
2630                 $res{'name'} = $4;
2631         } else {
2632                 $res{'name'} = unquote($4);
2633         }
2634
2635         return wantarray ? %res : \%res;
2636 }
2637
2638 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2639 sub parse_from_to_diffinfo {
2640         my ($diffinfo, $from, $to, @parents) = @_;
2641
2642         if ($diffinfo->{'nparents'}) {
2643                 # combined diff
2644                 $from->{'file'} = [];
2645                 $from->{'href'} = [];
2646                 fill_from_file_info($diffinfo, @parents)
2647                         unless exists $diffinfo->{'from_file'};
2648                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2649                         $from->{'file'}[$i] =
2650                                 defined $diffinfo->{'from_file'}[$i] ?
2651                                         $diffinfo->{'from_file'}[$i] :
2652                                         $diffinfo->{'to_file'};
2653                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2654                                 $from->{'href'}[$i] = href(action=>"blob",
2655                                                            hash_base=>$parents[$i],
2656                                                            hash=>$diffinfo->{'from_id'}[$i],
2657                                                            file_name=>$from->{'file'}[$i]);
2658                         } else {
2659                                 $from->{'href'}[$i] = undef;
2660                         }
2661                 }
2662         } else {
2663                 # ordinary (not combined) diff
2664                 $from->{'file'} = $diffinfo->{'from_file'};
2665                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2666                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2667                                                hash=>$diffinfo->{'from_id'},
2668                                                file_name=>$from->{'file'});
2669                 } else {
2670                         delete $from->{'href'};
2671                 }
2672         }
2673
2674         $to->{'file'} = $diffinfo->{'to_file'};
2675         if (!is_deleted($diffinfo)) { # file exists in result
2676                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2677                                      hash=>$diffinfo->{'to_id'},
2678                                      file_name=>$to->{'file'});
2679         } else {
2680                 delete $to->{'href'};
2681         }
2682 }
2683
2684 ## ......................................................................
2685 ## parse to array of hashes functions
2686
2687 sub git_get_heads_list {
2688         my $limit = shift;
2689         my @headslist;
2690
2691         open my $fd, '-|', git_cmd(), 'for-each-ref',
2692                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2693                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2694                 'refs/heads'
2695                 or return;
2696         while (my $line = <$fd>) {
2697                 my %ref_item;
2698
2699                 chomp $line;
2700                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2701                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2702                 my ($committer, $epoch, $tz) =
2703                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2704                 $ref_item{'fullname'}  = $name;
2705                 $name =~ s!^refs/heads/!!;
2706
2707                 $ref_item{'name'}  = $name;
2708                 $ref_item{'id'}    = $hash;
2709                 $ref_item{'title'} = $title || '(no commit message)';
2710                 $ref_item{'epoch'} = $epoch;
2711                 if ($epoch) {
2712                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2713                 } else {
2714                         $ref_item{'age'} = "unknown";
2715                 }
2716
2717                 push @headslist, \%ref_item;
2718         }
2719         close $fd;
2720
2721         return wantarray ? @headslist : \@headslist;
2722 }
2723
2724 sub git_get_tags_list {
2725         my $limit = shift;
2726         my @tagslist;
2727
2728         open my $fd, '-|', git_cmd(), 'for-each-ref',
2729                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2730                 '--format=%(objectname) %(objecttype) %(refname) '.
2731                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2732                 'refs/tags'
2733                 or return;
2734         while (my $line = <$fd>) {
2735                 my %ref_item;
2736
2737                 chomp $line;
2738                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2739                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2740                 my ($creator, $epoch, $tz) =
2741                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2742                 $ref_item{'fullname'} = $name;
2743                 $name =~ s!^refs/tags/!!;
2744
2745                 $ref_item{'type'} = $type;
2746                 $ref_item{'id'} = $id;
2747                 $ref_item{'name'} = $name;
2748                 if ($type eq "tag") {
2749                         $ref_item{'subject'} = $title;
2750                         $ref_item{'reftype'} = $reftype;
2751                         $ref_item{'refid'}   = $refid;
2752                 } else {
2753                         $ref_item{'reftype'} = $type;
2754                         $ref_item{'refid'}   = $id;
2755                 }
2756
2757                 if ($type eq "tag" || $type eq "commit") {
2758                         $ref_item{'epoch'} = $epoch;
2759                         if ($epoch) {
2760                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2761                         } else {
2762                                 $ref_item{'age'} = "unknown";
2763                         }
2764                 }
2765
2766                 push @tagslist, \%ref_item;
2767         }
2768         close $fd;
2769
2770         return wantarray ? @tagslist : \@tagslist;
2771 }
2772
2773 ## ----------------------------------------------------------------------
2774 ## filesystem-related functions
2775
2776 sub get_file_owner {
2777         my $path = shift;
2778
2779         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2780         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2781         if (!defined $gcos) {
2782                 return undef;
2783         }
2784         my $owner = $gcos;
2785         $owner =~ s/[,;].*$//;
2786         return to_utf8($owner);
2787 }
2788
2789 # assume that file exists
2790 sub insert_file {
2791         my $filename = shift;
2792
2793         open my $fd, '<', $filename;
2794         print map { to_utf8($_) } <$fd>;
2795         close $fd;
2796 }
2797
2798 ## ......................................................................
2799 ## mimetype related functions
2800
2801 sub mimetype_guess_file {
2802         my $filename = shift;
2803         my $mimemap = shift;
2804         -r $mimemap or return undef;
2805
2806         my %mimemap;
2807         open(MIME, $mimemap) or return undef;
2808         while (<MIME>) {
2809                 next if m/^#/; # skip comments
2810                 my ($mime, $exts) = split(/\t+/);
2811                 if (defined $exts) {
2812                         my @exts = split(/\s+/, $exts);
2813                         foreach my $ext (@exts) {
2814                                 $mimemap{$ext} = $mime;
2815                         }
2816                 }
2817         }
2818         close(MIME);
2819
2820         $filename =~ /\.([^.]*)$/;
2821         return $mimemap{$1};
2822 }
2823
2824 sub mimetype_guess {
2825         my $filename = shift;
2826         my $mime;
2827         $filename =~ /\./ or return undef;
2828
2829         if ($mimetypes_file) {
2830                 my $file = $mimetypes_file;
2831                 if ($file !~ m!^/!) { # if it is relative path
2832                         # it is relative to project
2833                         $file = "$projectroot/$project/$file";
2834                 }
2835                 $mime = mimetype_guess_file($filename, $file);
2836         }
2837         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2838         return $mime;
2839 }
2840
2841 sub blob_mimetype {
2842         my $fd = shift;
2843         my $filename = shift;
2844
2845         if ($filename) {
2846                 my $mime = mimetype_guess($filename);
2847                 $mime and return $mime;
2848         }
2849
2850         # just in case
2851         return $default_blob_plain_mimetype unless $fd;
2852
2853         if (-T $fd) {
2854                 return 'text/plain';
2855         } elsif (! $filename) {
2856                 return 'application/octet-stream';
2857         } elsif ($filename =~ m/\.png$/i) {
2858                 return 'image/png';
2859         } elsif ($filename =~ m/\.gif$/i) {
2860                 return 'image/gif';
2861         } elsif ($filename =~ m/\.jpe?g$/i) {
2862                 return 'image/jpeg';
2863         } else {
2864                 return 'application/octet-stream';
2865         }
2866 }
2867
2868 sub blob_contenttype {
2869         my ($fd, $file_name, $type) = @_;
2870
2871         $type ||= blob_mimetype($fd, $file_name);
2872         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2873                 $type .= "; charset=$default_text_plain_charset";
2874         }
2875
2876         return $type;
2877 }
2878
2879 ## ======================================================================
2880 ## functions printing HTML: header, footer, error page
2881
2882 sub git_header_html {
2883         my $status = shift || "200 OK";
2884         my $expires = shift;
2885
2886         my $title = "$site_name";
2887         if (defined $project) {
2888                 $title .= " - " . to_utf8($project);
2889                 if (defined $action) {
2890                         $title .= "/$action";
2891                         if (defined $file_name) {
2892                                 $title .= " - " . esc_path($file_name);
2893                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2894                                         $title .= "/";
2895                                 }
2896                         }
2897                 }
2898         }
2899         my $content_type;
2900         # require explicit support from the UA if we are to send the page as
2901         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2902         # we have to do this because MSIE sometimes globs '*/*', pretending to
2903         # support xhtml+xml but choking when it gets what it asked for.
2904         if (defined $cgi->http('HTTP_ACCEPT') &&
2905             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2906             $cgi->Accept('application/xhtml+xml') != 0) {
2907                 $content_type = 'application/xhtml+xml';
2908         } else {
2909                 $content_type = 'text/html';
2910         }
2911         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2912                            -status=> $status, -expires => $expires);
2913         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2914         print <<EOF;
2915 <?xml version="1.0" encoding="utf-8"?>
2916 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2917 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2918 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2919 <!-- git core binaries version $git_version -->
2920 <head>
2921 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2922 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2923 <meta name="robots" content="index, nofollow"/>
2924 <title>$title</title>
2925 EOF
2926         # the stylesheet, favicon etc urls won't work correctly with path_info
2927         # unless we set the appropriate base URL
2928         if ($ENV{'PATH_INFO'}) {
2929                 print "<base href=\"".esc_url($base_url)."\" />\n";
2930         }
2931         # print out each stylesheet that exist, providing backwards capability
2932         # for those people who defined $stylesheet in a config file
2933         if (defined $stylesheet) {
2934                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2935         } else {
2936                 foreach my $stylesheet (@stylesheets) {
2937                         next unless $stylesheet;
2938                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2939                 }
2940         }
2941         if (defined $project) {
2942                 my %href_params = get_feed_info();
2943                 if (!exists $href_params{'-title'}) {
2944                         $href_params{'-title'} = 'log';
2945                 }
2946
2947                 foreach my $format qw(RSS Atom) {
2948                         my $type = lc($format);
2949                         my %link_attr = (
2950                                 '-rel' => 'alternate',
2951                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2952                                 '-type' => "application/$type+xml"
2953                         );
2954
2955                         $href_params{'action'} = $type;
2956                         $link_attr{'-href'} = href(%href_params);
2957                         print "<link ".
2958                               "rel=\"$link_attr{'-rel'}\" ".
2959                               "title=\"$link_attr{'-title'}\" ".
2960                               "href=\"$link_attr{'-href'}\" ".
2961                               "type=\"$link_attr{'-type'}\" ".
2962                               "/>\n";
2963
2964                         $href_params{'extra_options'} = '--no-merges';
2965                         $link_attr{'-href'} = href(%href_params);
2966                         $link_attr{'-title'} .= ' (no merges)';
2967                         print "<link ".
2968                               "rel=\"$link_attr{'-rel'}\" ".
2969                               "title=\"$link_attr{'-title'}\" ".
2970                               "href=\"$link_attr{'-href'}\" ".
2971                               "type=\"$link_attr{'-type'}\" ".
2972                               "/>\n";
2973                 }
2974
2975         } else {
2976                 printf('<link rel="alternate" title="%s projects list" '.
2977                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2978                        $site_name, href(project=>undef, action=>"project_index"));
2979                 printf('<link rel="alternate" title="%s projects feeds" '.
2980                        'href="%s" type="text/x-opml" />'."\n",
2981                        $site_name, href(project=>undef, action=>"opml"));
2982         }
2983         if (defined $favicon) {
2984                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2985         }
2986
2987         print "</head>\n" .
2988               "<body>\n";
2989
2990         if (-f $site_header) {
2991                 insert_file($site_header);
2992         }
2993
2994         print "<div class=\"page_header\">\n" .
2995               $cgi->a({-href => esc_url($logo_url),
2996                        -title => $logo_label},
2997                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2998         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2999         if (defined $project) {
3000                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3001                 if (defined $action) {
3002                         print " / $action";
3003                 }
3004                 print "\n";
3005         }
3006         print "</div>\n";
3007
3008         my $have_search = gitweb_check_feature('search');
3009         if (defined $project && $have_search) {
3010                 if (!defined $searchtext) {
3011                         $searchtext = "";
3012                 }
3013                 my $search_hash;
3014                 if (defined $hash_base) {
3015                         $search_hash = $hash_base;
3016                 } elsif (defined $hash) {
3017                         $search_hash = $hash;
3018                 } else {
3019                         $search_hash = "HEAD";
3020                 }
3021                 my $action = $my_uri;
3022                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3023                 if ($use_pathinfo) {
3024                         $action .= "/".esc_url($project);
3025                 }
3026                 print $cgi->startform(-method => "get", -action => $action) .
3027                       "<div class=\"search\">\n" .
3028                       (!$use_pathinfo &&
3029                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3030                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3031                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3032                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3033                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3034                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3035                       " search:\n",
3036                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3037                       "<span title=\"Extended regular expression\">" .
3038                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3039                                      -checked => $search_use_regexp) .
3040                       "</span>" .
3041                       "</div>" .
3042                       $cgi->end_form() . "\n";
3043         }
3044 }
3045
3046 sub git_footer_html {
3047         my $feed_class = 'rss_logo';
3048
3049         print "<div class=\"page_footer\">\n";
3050         if (defined $project) {
3051                 my $descr = git_get_project_description($project);
3052                 if (defined $descr) {
3053                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3054                 }
3055
3056                 my %href_params = get_feed_info();
3057                 if (!%href_params) {
3058                         $feed_class .= ' generic';
3059                 }
3060                 $href_params{'-title'} ||= 'log';
3061
3062                 foreach my $format qw(RSS Atom) {
3063                         $href_params{'action'} = lc($format);
3064                         print $cgi->a({-href => href(%href_params),
3065                                       -title => "$href_params{'-title'} $format feed",
3066                                       -class => $feed_class}, $format)."\n";
3067                 }
3068
3069         } else {
3070                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3071                               -class => $feed_class}, "OPML") . " ";
3072                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3073                               -class => $feed_class}, "TXT") . "\n";
3074         }
3075         print "</div>\n"; # class="page_footer"
3076
3077         if (-f $site_footer) {
3078                 insert_file($site_footer);
3079         }
3080
3081         print "</body>\n" .
3082               "</html>";
3083 }
3084
3085 # die_error(<http_status_code>, <error_message>)
3086 # Example: die_error(404, 'Hash not found')
3087 # By convention, use the following status codes (as defined in RFC 2616):
3088 # 400: Invalid or missing CGI parameters, or
3089 #      requested object exists but has wrong type.
3090 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3091 #      this server or project.
3092 # 404: Requested object/revision/project doesn't exist.
3093 # 500: The server isn't configured properly, or
3094 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3095 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3096 sub die_error {
3097         my $status = shift || 500;
3098         my $error = shift || "Internal server error";
3099
3100         my %http_responses = (400 => '400 Bad Request',
3101                               403 => '403 Forbidden',
3102                               404 => '404 Not Found',
3103                               500 => '500 Internal Server Error');
3104         git_header_html($http_responses{$status});
3105         print <<EOF;
3106 <div class="page_body">
3107 <br /><br />
3108 $status - $error
3109 <br />
3110 </div>
3111 EOF
3112         git_footer_html();
3113         exit;
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## functions printing or outputting HTML: navigation
3118
3119 sub git_print_page_nav {
3120         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3121         $extra = '' if !defined $extra; # pager or formats
3122
3123         my @navs = qw(summary shortlog log commit commitdiff tree);
3124         if ($suppress) {
3125                 @navs = grep { $_ ne $suppress } @navs;
3126         }
3127
3128         my %arg = map { $_ => {action=>$_} } @navs;
3129         if (defined $head) {
3130                 for (qw(commit commitdiff)) {
3131                         $arg{$_}{'hash'} = $head;
3132                 }
3133                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3134                         for (qw(shortlog log)) {
3135                                 $arg{$_}{'hash'} = $head;
3136                         }
3137                 }
3138         }
3139
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         print "<div class=\"page_nav\">\n" .
3161                 (join " | ",
3162                  map { $_ eq $current ?
3163                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3164                  } @navs);
3165         print "<br/>\n$extra<br/>\n" .
3166               "</div>\n";
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 ## ......................................................................
3200 ## functions printing or outputting HTML: div
3201
3202 sub git_print_header_div {
3203         my ($action, $title, $hash, $hash_base) = @_;
3204         my %args = ();
3205
3206         $args{'action'} = $action;
3207         $args{'hash'} = $hash if $hash;
3208         $args{'hash_base'} = $hash_base if $hash_base;
3209
3210         print "<div class=\"header\">\n" .
3211               $cgi->a({-href => href(%args), -class => "title"},
3212               $title ? $title : $action) .
3213               "\n</div>\n";
3214 }
3215
3216 #sub git_print_authorship (\%) {
3217 sub git_print_authorship {
3218         my $co = shift;
3219
3220         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3221         print "<div class=\"author_date\">" .
3222               esc_html($co->{'author_name'}) .
3223               " [$ad{'rfc2822'}";
3224         if ($ad{'hour_local'} < 6) {
3225                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3226                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3227         } else {
3228                 printf(" (%02d:%02d %s)",
3229                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3230         }
3231         print "]</div>\n";
3232 }
3233
3234 sub git_print_page_path {
3235         my $name = shift;
3236         my $type = shift;
3237         my $hb = shift;
3238
3239
3240         print "<div class=\"page_path\">";
3241         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3242                       -title => 'tree root'}, to_utf8("[$project]"));
3243         print " / ";
3244         if (defined $name) {
3245                 my @dirname = split '/', $name;
3246                 my $basename = pop @dirname;
3247                 my $fullname = '';
3248
3249                 foreach my $dir (@dirname) {
3250                         $fullname .= ($fullname ? '/' : '') . $dir;
3251                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3252                                                      hash_base=>$hb),
3253                                       -title => $fullname}, esc_path($dir));
3254                         print " / ";
3255                 }
3256                 if (defined $type && $type eq 'blob') {
3257                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3258                                                      hash_base=>$hb),
3259                                       -title => $name}, esc_path($basename));
3260                 } elsif (defined $type && $type eq 'tree') {
3261                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3262                                                      hash_base=>$hb),
3263                                       -title => $name}, esc_path($basename));
3264                         print " / ";
3265                 } else {
3266                         print esc_path($basename);
3267                 }
3268         }
3269         print "<br/></div>\n";
3270 }
3271
3272 # sub git_print_log (\@;%) {
3273 sub git_print_log ($;%) {
3274         my $log = shift;
3275         my %opts = @_;
3276
3277         if ($opts{'-remove_title'}) {
3278                 # remove title, i.e. first line of log
3279                 shift @$log;
3280         }
3281         # remove leading empty lines
3282         while (defined $log->[0] && $log->[0] eq "") {
3283                 shift @$log;
3284         }
3285
3286         # print log
3287         my $signoff = 0;
3288         my $empty = 0;
3289         foreach my $line (@$log) {
3290                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3291                         $signoff = 1;
3292                         $empty = 0;
3293                         if (! $opts{'-remove_signoff'}) {
3294                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3295                                 next;
3296                         } else {
3297                                 # remove signoff lines
3298                                 next;
3299                         }
3300                 } else {
3301                         $signoff = 0;
3302                 }
3303
3304                 # print only one empty line
3305                 # do not print empty line after signoff
3306                 if ($line eq "") {
3307                         next if ($empty || $signoff);
3308                         $empty = 1;
3309                 } else {
3310                         $empty = 0;
3311                 }
3312
3313                 print format_log_line_html($line) . "<br/>\n";
3314         }
3315
3316         if ($opts{'-final_empty_line'}) {
3317                 # end with single empty line
3318                 print "<br/>\n" unless $empty;
3319         }
3320 }
3321
3322 # return link target (what link points to)
3323 sub git_get_link_target {
3324         my $hash = shift;
3325         my $link_target;
3326
3327         # read link
3328         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3329                 or return;
3330         {
3331                 local $/;
3332                 $link_target = <$fd>;
3333         }
3334         close $fd
3335                 or return;
3336
3337         return $link_target;
3338 }
3339
3340 # given link target, and the directory (basedir) the link is in,
3341 # return target of link relative to top directory (top tree);
3342 # return undef if it is not possible (including absolute links).
3343 sub normalize_link_target {
3344         my ($link_target, $basedir, $hash_base) = @_;
3345
3346         # we can normalize symlink target only if $hash_base is provided
3347         return unless $hash_base;
3348
3349         # absolute symlinks (beginning with '/') cannot be normalized
3350         return if (substr($link_target, 0, 1) eq '/');
3351
3352         # normalize link target to path from top (root) tree (dir)
3353         my $path;
3354         if ($basedir) {
3355                 $path = $basedir . '/' . $link_target;
3356         } else {
3357                 # we are in top (root) tree (dir)
3358                 $path = $link_target;
3359         }
3360
3361         # remove //, /./, and /../
3362         my @path_parts;
3363         foreach my $part (split('/', $path)) {
3364                 # discard '.' and ''
3365                 next if (!$part || $part eq '.');
3366                 # handle '..'
3367                 if ($part eq '..') {
3368                         if (@path_parts) {
3369                                 pop @path_parts;
3370                         } else {
3371                                 # link leads outside repository (outside top dir)
3372                                 return;
3373                         }
3374                 } else {
3375                         push @path_parts, $part;
3376                 }
3377         }
3378         $path = join('/', @path_parts);
3379
3380         return $path;
3381 }
3382
3383 # print tree entry (row of git_tree), but without encompassing <tr> element
3384 sub git_print_tree_entry {
3385         my ($t, $basedir, $hash_base, $have_blame) = @_;
3386
3387         my %base_key = ();
3388         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3389
3390         # The format of a table row is: mode list link.  Where mode is
3391         # the mode of the entry, list is the name of the entry, an href,
3392         # and link is the action links of the entry.
3393
3394         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3395         if ($t->{'type'} eq "blob") {
3396                 print "<td class=\"list\">" .
3397                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3398                                                file_name=>"$basedir$t->{'name'}", %base_key),
3399                                 -class => "list"}, esc_path($t->{'name'}));
3400                 if (S_ISLNK(oct $t->{'mode'})) {
3401                         my $link_target = git_get_link_target($t->{'hash'});
3402                         if ($link_target) {
3403                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3404                                 if (defined $norm_target) {
3405                                         print " -> " .
3406                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3407                                                                      file_name=>$norm_target),
3408                                                        -title => $norm_target}, esc_path($link_target));
3409                                 } else {
3410                                         print " -> " . esc_path($link_target);
3411                                 }
3412                         }
3413                 }
3414                 print "</td>\n";
3415                 print "<td class=\"link\">";
3416                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3417                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3418                               "blob");
3419                 if ($have_blame) {
3420                         print " | " .
3421                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3422                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3423                                       "blame");
3424                 }
3425                 if (defined $hash_base) {
3426                         print " | " .
3427                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3428                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3429                                       "history");
3430                 }
3431                 print " | " .
3432                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3433                                                file_name=>"$basedir$t->{'name'}")},
3434                                 "raw");
3435                 print "</td>\n";
3436
3437         } elsif ($t->{'type'} eq "tree") {
3438                 print "<td class=\"list\">";
3439                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3440                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3441                               esc_path($t->{'name'}));
3442                 print "</td>\n";
3443                 print "<td class=\"link\">";
3444                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3445                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3446                               "tree");
3447                 if (defined $hash_base) {
3448                         print " | " .
3449                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3450                                                      file_name=>"$basedir$t->{'name'}")},
3451                                       "history");
3452                 }
3453                 print "</td>\n";
3454         } else {
3455                 # unknown object: we can only present history for it
3456                 # (this includes 'commit' object, i.e. submodule support)
3457                 print "<td class=\"list\">" .
3458                       esc_path($t->{'name'}) .
3459                       "</td>\n";
3460                 print "<td class=\"link\">";
3461                 if (defined $hash_base) {
3462                         print $cgi->a({-href => href(action=>"history",
3463                                                      hash_base=>$hash_base,
3464                                                      file_name=>"$basedir$t->{'name'}")},
3465                                       "history");
3466                 }
3467                 print "</td>\n";
3468         }
3469 }
3470
3471 ## ......................................................................
3472 ## functions printing large fragments of HTML
3473
3474 # get pre-image filenames for merge (combined) diff
3475 sub fill_from_file_info {
3476         my ($diff, @parents) = @_;
3477
3478         $diff->{'from_file'} = [ ];
3479         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3480         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3481                 if ($diff->{'status'}[$i] eq 'R' ||
3482                     $diff->{'status'}[$i] eq 'C') {
3483                         $diff->{'from_file'}[$i] =
3484                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3485                 }
3486         }
3487
3488         return $diff;
3489 }
3490
3491 # is current raw difftree line of file deletion
3492 sub is_deleted {
3493         my $diffinfo = shift;
3494
3495         return $diffinfo->{'to_id'} eq ('0' x 40);
3496 }
3497
3498 # does patch correspond to [previous] difftree raw line
3499 # $diffinfo  - hashref of parsed raw diff format
3500 # $patchinfo - hashref of parsed patch diff format
3501 #              (the same keys as in $diffinfo)
3502 sub is_patch_split {
3503         my ($diffinfo, $patchinfo) = @_;
3504
3505         return defined $diffinfo && defined $patchinfo
3506                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3507 }
3508
3509
3510 sub git_difftree_body {
3511         my ($difftree, $hash, @parents) = @_;
3512         my ($parent) = $parents[0];
3513         my $have_blame = gitweb_check_feature('blame');
3514         print "<div class=\"list_head\">\n";
3515         if ($#{$difftree} > 10) {
3516                 print(($#{$difftree} + 1) . " files changed:\n");
3517         }
3518         print "</div>\n";
3519
3520         print "<table class=\"" .
3521               (@parents > 1 ? "combined " : "") .
3522               "diff_tree\">\n";
3523
3524         # header only for combined diff in 'commitdiff' view
3525         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3526         if ($has_header) {
3527                 # table header
3528                 print "<thead><tr>\n" .
3529                        "<th></th><th></th>\n"; # filename, patchN link
3530                 for (my $i = 0; $i < @parents; $i++) {
3531                         my $par = $parents[$i];
3532                         print "<th>" .
3533                               $cgi->a({-href => href(action=>"commitdiff",
3534                                                      hash=>$hash, hash_parent=>$par),
3535                                        -title => 'commitdiff to parent number ' .
3536                                                   ($i+1) . ': ' . substr($par,0,7)},
3537                                       $i+1) .
3538                               "&nbsp;</th>\n";
3539                 }
3540                 print "</tr></thead>\n<tbody>\n";
3541         }
3542
3543         my $alternate = 1;
3544         my $patchno = 0;
3545         foreach my $line (@{$difftree}) {
3546                 my $diff = parsed_difftree_line($line);
3547
3548                 if ($alternate) {
3549                         print "<tr class=\"dark\">\n";
3550                 } else {
3551                         print "<tr class=\"light\">\n";
3552                 }
3553                 $alternate ^= 1;
3554
3555                 if (exists $diff->{'nparents'}) { # combined diff
3556
3557                         fill_from_file_info($diff, @parents)
3558                                 unless exists $diff->{'from_file'};
3559
3560                         if (!is_deleted($diff)) {
3561                                 # file exists in the result (child) commit
3562                                 print "<td>" .
3563                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3564                                                              file_name=>$diff->{'to_file'},
3565                                                              hash_base=>$hash),
3566                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3567                                       "</td>\n";
3568                         } else {
3569                                 print "<td>" .
3570                                       esc_path($diff->{'to_file'}) .
3571                                       "</td>\n";
3572                         }
3573
3574                         if ($action eq 'commitdiff') {
3575                                 # link to patch
3576                                 $patchno++;
3577                                 print "<td class=\"link\">" .
3578                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3579                                       " | " .
3580                                       "</td>\n";
3581                         }
3582
3583                         my $has_history = 0;
3584                         my $not_deleted = 0;
3585                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3586                                 my $hash_parent = $parents[$i];
3587                                 my $from_hash = $diff->{'from_id'}[$i];
3588                                 my $from_path = $diff->{'from_file'}[$i];
3589                                 my $status = $diff->{'status'}[$i];
3590
3591                                 $has_history ||= ($status ne 'A');
3592                                 $not_deleted ||= ($status ne 'D');
3593
3594                                 if ($status eq 'A') {
3595                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3596                                 } elsif ($status eq 'D') {
3597                                         print "<td class=\"link\">" .
3598                                               $cgi->a({-href => href(action=>"blob",
3599                                                                      hash_base=>$hash,
3600                                                                      hash=>$from_hash,
3601                                                                      file_name=>$from_path)},
3602                                                       "blob" . ($i+1)) .
3603                                               " | </td>\n";
3604                                 } else {
3605                                         if ($diff->{'to_id'} eq $from_hash) {
3606                                                 print "<td class=\"link nochange\">";
3607                                         } else {
3608                                                 print "<td class=\"link\">";
3609                                         }
3610                                         print $cgi->a({-href => href(action=>"blobdiff",
3611                                                                      hash=>$diff->{'to_id'},
3612                                                                      hash_parent=>$from_hash,
3613                                                                      hash_base=>$hash,
3614                                                                      hash_parent_base=>$hash_parent,
3615                                                                      file_name=>$diff->{'to_file'},
3616                                                                      file_parent=>$from_path)},
3617                                                       "diff" . ($i+1)) .
3618                                               " | </td>\n";
3619                                 }
3620                         }
3621
3622                         print "<td class=\"link\">";
3623                         if ($not_deleted) {
3624                                 print $cgi->a({-href => href(action=>"blob",
3625                                                              hash=>$diff->{'to_id'},
3626                                                              file_name=>$diff->{'to_file'},
3627                                                              hash_base=>$hash)},
3628                                               "blob");
3629                                 print " | " if ($has_history);
3630                         }
3631                         if ($has_history) {
3632                                 print $cgi->a({-href => href(action=>"history",
3633                                                              file_name=>$diff->{'to_file'},
3634                                                              hash_base=>$hash)},
3635                                               "history");
3636                         }
3637                         print "</td>\n";
3638
3639                         print "</tr>\n";
3640                         next; # instead of 'else' clause, to avoid extra indent
3641                 }
3642                 # else ordinary diff
3643
3644                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3645                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3646                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3647                         $to_mode_oct = oct $diff->{'to_mode'};
3648                         if (S_ISREG($to_mode_oct)) { # only for regular file
3649                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3650                         }
3651                         $to_file_type = file_type($diff->{'to_mode'});
3652                 }
3653                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3654                         $from_mode_oct = oct $diff->{'from_mode'};
3655                         if (S_ISREG($to_mode_oct)) { # only for regular file
3656                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3657                         }
3658                         $from_file_type = file_type($diff->{'from_mode'});
3659                 }
3660
3661                 if ($diff->{'status'} eq "A") { # created
3662                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3663                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3664                         $mode_chng   .= "]</span>";
3665                         print "<td>";
3666                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3667                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3668                                       -class => "list"}, esc_path($diff->{'file'}));
3669                         print "</td>\n";
3670                         print "<td>$mode_chng</td>\n";
3671                         print "<td class=\"link\">";
3672                         if ($action eq 'commitdiff') {
3673                                 # link to patch
3674                                 $patchno++;
3675                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3676                                 print " | ";
3677                         }
3678                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3679                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3680                                       "blob");
3681                         print "</td>\n";
3682
3683                 } elsif ($diff->{'status'} eq "D") { # deleted
3684                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3685                         print "<td>";
3686                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3687                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3688                                        -class => "list"}, esc_path($diff->{'file'}));
3689                         print "</td>\n";
3690                         print "<td>$mode_chng</td>\n";
3691                         print "<td class=\"link\">";
3692                         if ($action eq 'commitdiff') {
3693                                 # link to patch
3694                                 $patchno++;
3695                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3696                                 print " | ";
3697                         }
3698                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3699                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3700                                       "blob") . " | ";
3701                         if ($have_blame) {
3702                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3703                                                              file_name=>$diff->{'file'})},
3704                                               "blame") . " | ";
3705                         }
3706                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3707                                                      file_name=>$diff->{'file'})},
3708                                       "history");
3709                         print "</td>\n";
3710
3711                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3712                         my $mode_chnge = "";
3713                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3714                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3715                                 if ($from_file_type ne $to_file_type) {
3716                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3717                                 }
3718                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3719                                         if ($from_mode_str && $to_mode_str) {
3720                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3721                                         } elsif ($to_mode_str) {
3722                                                 $mode_chnge .= " mode: $to_mode_str";
3723                                         }
3724                                 }
3725                                 $mode_chnge .= "]</span>\n";
3726                         }
3727                         print "<td>";
3728                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3729                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3730                                       -class => "list"}, esc_path($diff->{'file'}));
3731                         print "</td>\n";
3732                         print "<td>$mode_chnge</td>\n";
3733                         print "<td class=\"link\">";
3734                         if ($action eq 'commitdiff') {
3735                                 # link to patch
3736                                 $patchno++;
3737                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3738                                       " | ";
3739                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3740                                 # "commit" view and modified file (not onlu mode changed)
3741                                 print $cgi->a({-href => href(action=>"blobdiff",
3742                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3743                                                              hash_base=>$hash, hash_parent_base=>$parent,
3744                                                              file_name=>$diff->{'file'})},
3745                                               "diff") .
3746                                       " | ";
3747                         }
3748                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3749                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3750                                        "blob") . " | ";
3751                         if ($have_blame) {
3752                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3753                                                              file_name=>$diff->{'file'})},
3754                                               "blame") . " | ";
3755                         }
3756                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3757                                                      file_name=>$diff->{'file'})},
3758                                       "history");
3759                         print "</td>\n";
3760
3761                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3762                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3763                         my $nstatus = $status_name{$diff->{'status'}};
3764                         my $mode_chng = "";
3765                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3766                                 # mode also for directories, so we cannot use $to_mode_str
3767                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3768                         }
3769                         print "<td>" .
3770                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3771                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3772                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3773                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3774                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3775                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3776                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3777                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3778                               "<td class=\"link\">";
3779                         if ($action eq 'commitdiff') {
3780                                 # link to patch
3781                                 $patchno++;
3782                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3783                                       " | ";
3784                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3785                                 # "commit" view and modified file (not only pure rename or copy)
3786                                 print $cgi->a({-href => href(action=>"blobdiff",
3787                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3788                                                              hash_base=>$hash, hash_parent_base=>$parent,
3789                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3790                                               "diff") .
3791                                       " | ";
3792                         }
3793                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3794                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3795                                       "blob") . " | ";
3796                         if ($have_blame) {
3797                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3798                                                              file_name=>$diff->{'to_file'})},
3799                                               "blame") . " | ";
3800                         }
3801                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3802                                                     file_name=>$diff->{'to_file'})},
3803                                       "history");
3804                         print "</td>\n";
3805
3806                 } # we should not encounter Unmerged (U) or Unknown (X) status
3807                 print "</tr>\n";
3808         }
3809         print "</tbody>" if $has_header;
3810         print "</table>\n";
3811 }
3812
3813 sub git_patchset_body {
3814         my ($fd, $difftree, $hash, @hash_parents) = @_;
3815         my ($hash_parent) = $hash_parents[0];
3816
3817         my $is_combined = (@hash_parents > 1);
3818         my $patch_idx = 0;
3819         my $patch_number = 0;
3820         my $patch_line;
3821         my $diffinfo;
3822         my $to_name;
3823         my (%from, %to);
3824
3825         print "<div class=\"patchset\">\n";
3826
3827         # skip to first patch
3828         while ($patch_line = <$fd>) {
3829                 chomp $patch_line;
3830
3831                 last if ($patch_line =~ m/^diff /);
3832         }
3833
3834  PATCH:
3835         while ($patch_line) {
3836
3837                 # parse "git diff" header line
3838                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3839                         # $1 is from_name, which we do not use
3840                         $to_name = unquote($2);
3841                         $to_name =~ s!^b/!!;
3842                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3843                         # $1 is 'cc' or 'combined', which we do not use
3844                         $to_name = unquote($2);
3845                 } else {
3846                         $to_name = undef;
3847                 }
3848
3849                 # check if current patch belong to current raw line
3850                 # and parse raw git-diff line if needed
3851                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3852                         # this is continuation of a split patch
3853                         print "<div class=\"patch cont\">\n";
3854                 } else {
3855                         # advance raw git-diff output if needed
3856                         $patch_idx++ if defined $diffinfo;
3857
3858                         # read and prepare patch information
3859                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3860
3861                         # compact combined diff output can have some patches skipped
3862                         # find which patch (using pathname of result) we are at now;
3863                         if ($is_combined) {
3864                                 while ($to_name ne $diffinfo->{'to_file'}) {
3865                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3866                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3867                                               "</div>\n";  # class="patch"
3868
3869                                         $patch_idx++;
3870                                         $patch_number++;
3871
3872                                         last if $patch_idx > $#$difftree;
3873                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3874                                 }
3875                         }
3876
3877                         # modifies %from, %to hashes
3878                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3879
3880                         # this is first patch for raw difftree line with $patch_idx index
3881                         # we index @$difftree array from 0, but number patches from 1
3882                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3883                 }
3884
3885                 # git diff header
3886                 #assert($patch_line =~ m/^diff /) if DEBUG;
3887                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3888                 $patch_number++;
3889                 # print "git diff" header
3890                 print format_git_diff_header_line($patch_line, $diffinfo,
3891                                                   \%from, \%to);
3892
3893                 # print extended diff header
3894                 print "<div class=\"diff extended_header\">\n";
3895         EXTENDED_HEADER:
3896                 while ($patch_line = <$fd>) {
3897                         chomp $patch_line;
3898
3899                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3900
3901                         print format_extended_diff_header_line($patch_line, $diffinfo,
3902                                                                \%from, \%to);
3903                 }
3904                 print "</div>\n"; # class="diff extended_header"
3905
3906                 # from-file/to-file diff header
3907                 if (! $patch_line) {
3908                         print "</div>\n"; # class="patch"
3909                         last PATCH;
3910                 }
3911                 next PATCH if ($patch_line =~ m/^diff /);
3912                 #assert($patch_line =~ m/^---/) if DEBUG;
3913
3914                 my $last_patch_line = $patch_line;
3915                 $patch_line = <$fd>;
3916                 chomp $patch_line;
3917                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3918
3919                 print format_diff_from_to_header($last_patch_line, $patch_line,
3920                                                  $diffinfo, \%from, \%to,
3921                                                  @hash_parents);
3922
3923                 # the patch itself
3924         LINE:
3925                 while ($patch_line = <$fd>) {
3926                         chomp $patch_line;
3927
3928                         next PATCH if ($patch_line =~ m/^diff /);
3929
3930                         print format_diff_line($patch_line, \%from, \%to);
3931                 }
3932
3933         } continue {
3934                 print "</div>\n"; # class="patch"
3935         }
3936
3937         # for compact combined (--cc) format, with chunk and patch simpliciaction
3938         # patchset might be empty, but there might be unprocessed raw lines
3939         for (++$patch_idx if $patch_number > 0;
3940              $patch_idx < @$difftree;
3941              ++$patch_idx) {
3942                 # read and prepare patch information
3943                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3944
3945                 # generate anchor for "patch" links in difftree / whatchanged part
3946                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3947                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3948                       "</div>\n";  # class="patch"
3949
3950                 $patch_number++;
3951         }
3952
3953         if ($patch_number == 0) {
3954                 if (@hash_parents > 1) {
3955                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3956                 } else {
3957                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3958                 }
3959         }
3960
3961         print "</div>\n"; # class="patchset"
3962 }
3963
3964 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3965
3966 # fills project list info (age, description, owner, forks) for each
3967 # project in the list, removing invalid projects from returned list
3968 # NOTE: modifies $projlist, but does not remove entries from it
3969 sub fill_project_list_info {
3970         my ($projlist, $check_forks) = @_;
3971         my @projects;
3972
3973         my $show_ctags = gitweb_check_feature('ctags');
3974  PROJECT:
3975         foreach my $pr (@$projlist) {
3976                 my (@activity) = git_get_last_activity($pr->{'path'});
3977                 unless (@activity) {
3978                         next PROJECT;
3979                 }
3980                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3981                 if (!defined $pr->{'descr'}) {
3982                         my $descr = git_get_project_description($pr->{'path'}) || "";
3983                         $descr = to_utf8($descr);
3984                         $pr->{'descr_long'} = $descr;
3985                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3986                 }
3987                 if (!defined $pr->{'owner'}) {
3988                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3989                 }
3990                 if ($check_forks) {
3991                         my $pname = $pr->{'path'};
3992                         if (($pname =~ s/\.git$//) &&
3993                             ($pname !~ /\/$/) &&
3994                             (-d "$projectroot/$pname")) {
3995                                 $pr->{'forks'} = "-d $projectroot/$pname";
3996                         }       else {
3997                                 $pr->{'forks'} = 0;
3998                         }
3999                 }
4000                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4001                 push @projects, $pr;
4002         }
4003
4004         return @projects;
4005 }
4006
4007 # print 'sort by' <th> element, generating 'sort by $name' replay link
4008 # if that order is not selected
4009 sub print_sort_th {
4010         my ($name, $order, $header) = @_;
4011         $header ||= ucfirst($name);
4012
4013         if ($order eq $name) {
4014                 print "<th>$header</th>\n";
4015         } else {
4016                 print "<th>" .
4017                       $cgi->a({-href => href(-replay=>1, order=>$name),
4018                                -class => "header"}, $header) .
4019                       "</th>\n";
4020         }
4021 }
4022
4023 sub git_project_list_body {
4024         # actually uses global variable $project
4025         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4026
4027         my $check_forks = gitweb_check_feature('forks');
4028         my @projects = fill_project_list_info($projlist, $check_forks);
4029
4030         $order ||= $default_projects_order;
4031         $from = 0 unless defined $from;
4032         $to = $#projects if (!defined $to || $#projects < $to);
4033
4034         my %order_info = (
4035                 project => { key => 'path', type => 'str' },
4036                 descr => { key => 'descr_long', type => 'str' },
4037                 owner => { key => 'owner', type => 'str' },
4038                 age => { key => 'age', type => 'num' }
4039         );
4040         my $oi = $order_info{$order};
4041         if ($oi->{'type'} eq 'str') {
4042                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4043         } else {
4044                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4045         }
4046
4047         my $show_ctags = gitweb_check_feature('ctags');
4048         if ($show_ctags) {
4049                 my %ctags;
4050                 foreach my $p (@projects) {
4051                         foreach my $ct (keys %{$p->{'ctags'}}) {
4052                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4053                         }
4054                 }
4055                 my $cloud = git_populate_project_tagcloud(\%ctags);
4056                 print git_show_project_tagcloud($cloud, 64);
4057         }
4058
4059         print "<table class=\"project_list\">\n";
4060         unless ($no_header) {
4061                 print "<tr>\n";
4062                 if ($check_forks) {
4063                         print "<th></th>\n";
4064                 }
4065                 print_sort_th('project', $order, 'Project');
4066                 print_sort_th('descr', $order, 'Description');
4067                 print_sort_th('owner', $order, 'Owner');
4068                 print_sort_th('age', $order, 'Last Change');
4069                 print "<th></th>\n" . # for links
4070                       "</tr>\n";
4071         }
4072         my $alternate = 1;
4073         my $tagfilter = $cgi->param('by_tag');
4074         for (my $i = $from; $i <= $to; $i++) {
4075                 my $pr = $projects[$i];
4076
4077                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4078                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4079                         and not $pr->{'descr_long'} =~ /$searchtext/;
4080                 # Weed out forks or non-matching entries of search
4081                 if ($check_forks) {
4082                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4083                         $forkbase="^$forkbase" if $forkbase;
4084                         next if not $searchtext and not $tagfilter and $show_ctags
4085                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4086                 }
4087
4088                 if ($alternate) {
4089                         print "<tr class=\"dark\">\n";
4090                 } else {
4091                         print "<tr class=\"light\">\n";
4092                 }
4093                 $alternate ^= 1;
4094                 if ($check_forks) {
4095                         print "<td>";
4096                         if ($pr->{'forks'}) {
4097                                 print "<!-- $pr->{'forks'} -->\n";
4098                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4099                         }
4100                         print "</td>\n";
4101                 }
4102                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4103                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4104                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4105                                         -class => "list", -title => $pr->{'descr_long'}},
4106                                         esc_html($pr->{'descr'})) . "</td>\n" .
4107                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4108                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4109                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4110                       "<td class=\"link\">" .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4114                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4115                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4116                       "</td>\n" .
4117                       "</tr>\n";
4118         }
4119         if (defined $extra) {
4120                 print "<tr>\n";
4121                 if ($check_forks) {
4122                         print "<td></td>\n";
4123                 }
4124                 print "<td colspan=\"5\">$extra</td>\n" .
4125                       "</tr>\n";
4126         }
4127         print "</table>\n";
4128 }
4129
4130 sub git_shortlog_body {
4131         # uses global variable $project
4132         my ($commitlist, $from, $to, $refs, $extra) = @_;
4133
4134         $from = 0 unless defined $from;
4135         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4136
4137         print "<table class=\"shortlog\">\n";
4138         my $alternate = 1;
4139         for (my $i = $from; $i <= $to; $i++) {
4140                 my %co = %{$commitlist->[$i]};
4141                 my $commit = $co{'id'};
4142                 my $ref = format_ref_marker($refs, $commit);
4143                 if ($alternate) {
4144                         print "<tr class=\"dark\">\n";
4145                 } else {
4146                         print "<tr class=\"light\">\n";
4147                 }
4148                 $alternate ^= 1;
4149                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4150                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4151                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4152                       "<td><i>" . $author . "</i></td>\n" .
4153                       "<td>";
4154                 print format_subject_html($co{'title'}, $co{'title_short'},
4155                                           href(action=>"commit", hash=>$commit), $ref);
4156                 print "</td>\n" .
4157                       "<td class=\"link\">" .
4158                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4159                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4160                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4161                 my $snapshot_links = format_snapshot_links($commit);
4162                 if (defined $snapshot_links) {
4163                         print " | " . $snapshot_links;
4164                 }
4165                 print "</td>\n" .
4166                       "</tr>\n";
4167         }
4168         if (defined $extra) {
4169                 print "<tr>\n" .
4170                       "<td colspan=\"4\">$extra</td>\n" .
4171                       "</tr>\n";
4172         }
4173         print "</table>\n";
4174 }
4175
4176 sub git_history_body {
4177         # Warning: assumes constant type (blob or tree) during history
4178         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4179
4180         $from = 0 unless defined $from;
4181         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4182
4183         print "<table class=\"history\">\n";
4184         my $alternate = 1;
4185         for (my $i = $from; $i <= $to; $i++) {
4186                 my %co = %{$commitlist->[$i]};
4187                 if (!%co) {
4188                         next;
4189                 }
4190                 my $commit = $co{'id'};
4191
4192                 my $ref = format_ref_marker($refs, $commit);
4193
4194                 if ($alternate) {
4195                         print "<tr class=\"dark\">\n";
4196                 } else {
4197                         print "<tr class=\"light\">\n";
4198                 }
4199                 $alternate ^= 1;
4200         # shortlog uses      chop_str($co{'author_name'}, 10)
4201                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4202                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4203                       "<td><i>" . $author . "</i></td>\n" .
4204                       "<td>";
4205                 # originally git_history used chop_str($co{'title'}, 50)
4206                 print format_subject_html($co{'title'}, $co{'title_short'},
4207                                           href(action=>"commit", hash=>$commit), $ref);
4208                 print "</td>\n" .
4209                       "<td class=\"link\">" .
4210                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4211                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4212
4213                 if ($ftype eq 'blob') {
4214                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4215                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4216                         if (defined $blob_current && defined $blob_parent &&
4217                                         $blob_current ne $blob_parent) {
4218                                 print " | " .
4219                                         $cgi->a({-href => href(action=>"blobdiff",
4220                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4221                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4222                                                                file_name=>$file_name)},
4223                                                 "diff to current");
4224                         }
4225                 }
4226                 print "</td>\n" .
4227                       "</tr>\n";
4228         }
4229         if (defined $extra) {
4230                 print "<tr>\n" .
4231                       "<td colspan=\"4\">$extra</td>\n" .
4232                       "</tr>\n";
4233         }
4234         print "</table>\n";
4235 }
4236
4237 sub git_tags_body {
4238         # uses global variable $project
4239         my ($taglist, $from, $to, $extra) = @_;
4240         $from = 0 unless defined $from;
4241         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4242
4243         print "<table class=\"tags\">\n";
4244         my $alternate = 1;
4245         for (my $i = $from; $i <= $to; $i++) {
4246                 my $entry = $taglist->[$i];
4247                 my %tag = %$entry;
4248                 my $comment = $tag{'subject'};
4249                 my $comment_short;
4250                 if (defined $comment) {
4251                         $comment_short = chop_str($comment, 30, 5);
4252                 }
4253                 if ($alternate) {
4254                         print "<tr class=\"dark\">\n";
4255                 } else {
4256                         print "<tr class=\"light\">\n";
4257                 }
4258                 $alternate ^= 1;
4259                 if (defined $tag{'age'}) {
4260                         print "<td><i>$tag{'age'}</i></td>\n";
4261                 } else {
4262                         print "<td></td>\n";
4263                 }
4264                 print "<td>" .
4265                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4266                                -class => "list name"}, esc_html($tag{'name'})) .
4267                       "</td>\n" .
4268                       "<td>";
4269                 if (defined $comment) {
4270                         print format_subject_html($comment, $comment_short,
4271                                                   href(action=>"tag", hash=>$tag{'id'}));
4272                 }
4273                 print "</td>\n" .
4274                       "<td class=\"selflink\">";
4275                 if ($tag{'type'} eq "tag") {
4276                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4277                 } else {
4278                         print "&nbsp;";
4279                 }
4280                 print "</td>\n" .
4281                       "<td class=\"link\">" . " | " .
4282                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4283                 if ($tag{'reftype'} eq "commit") {
4284                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4285                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4286                 } elsif ($tag{'reftype'} eq "blob") {
4287                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4288                 }
4289                 print "</td>\n" .
4290                       "</tr>";
4291         }
4292         if (defined $extra) {
4293                 print "<tr>\n" .
4294                       "<td colspan=\"5\">$extra</td>\n" .
4295                       "</tr>\n";
4296         }
4297         print "</table>\n";
4298 }
4299
4300 sub git_heads_body {
4301         # uses global variable $project
4302         my ($headlist, $head, $from, $to, $extra) = @_;
4303         $from = 0 unless defined $from;
4304         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4305
4306         print "<table class=\"heads\">\n";
4307         my $alternate = 1;
4308         for (my $i = $from; $i <= $to; $i++) {
4309                 my $entry = $headlist->[$i];
4310                 my %ref = %$entry;
4311                 my $curr = $ref{'id'} eq $head;
4312                 if ($alternate) {
4313                         print "<tr class=\"dark\">\n";
4314                 } else {
4315                         print "<tr class=\"light\">\n";
4316                 }
4317                 $alternate ^= 1;
4318                 print "<td><i>$ref{'age'}</i></td>\n" .
4319                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4320                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4321                                -class => "list name"},esc_html($ref{'name'})) .
4322                       "</td>\n" .
4323                       "<td class=\"link\">" .
4324                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4325                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4326                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4327                       "</td>\n" .
4328                       "</tr>";
4329         }
4330         if (defined $extra) {
4331                 print "<tr>\n" .
4332                       "<td colspan=\"3\">$extra</td>\n" .
4333                       "</tr>\n";
4334         }
4335         print "</table>\n";
4336 }
4337
4338 sub git_search_grep_body {
4339         my ($commitlist, $from, $to, $extra) = @_;
4340         $from = 0 unless defined $from;
4341         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4342
4343         print "<table class=\"commit_search\">\n";
4344         my $alternate = 1;
4345         for (my $i = $from; $i <= $to; $i++) {
4346                 my %co = %{$commitlist->[$i]};
4347                 if (!%co) {
4348                         next;
4349                 }
4350                 my $commit = $co{'id'};
4351                 if ($alternate) {
4352                         print "<tr class=\"dark\">\n";
4353                 } else {
4354                         print "<tr class=\"light\">\n";
4355                 }
4356                 $alternate ^= 1;
4357                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4358                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4359                       "<td><i>" . $author . "</i></td>\n" .
4360                       "<td>" .
4361                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4362                                -class => "list subject"},
4363                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4364                 my $comment = $co{'comment'};
4365                 foreach my $line (@$comment) {
4366                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4367                                 my ($lead, $match, $trail) = ($1, $2, $3);
4368                                 $match = chop_str($match, 70, 5, 'center');
4369                                 my $contextlen = int((80 - length($match))/2);
4370                                 $contextlen = 30 if ($contextlen > 30);
4371                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4372                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4373
4374                                 $lead  = esc_html($lead);
4375                                 $match = esc_html($match);
4376                                 $trail = esc_html($trail);
4377
4378                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4379                         }
4380                 }
4381                 print "</td>\n" .
4382                       "<td class=\"link\">" .
4383                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4384                       " | " .
4385                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4386                       " | " .
4387                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4388                 print "</td>\n" .
4389                       "</tr>\n";
4390         }
4391         if (defined $extra) {
4392                 print "<tr>\n" .
4393                       "<td colspan=\"3\">$extra</td>\n" .
4394                       "</tr>\n";
4395         }
4396         print "</table>\n";
4397 }
4398
4399 ## ======================================================================
4400 ## ======================================================================
4401 ## actions
4402
4403 sub git_project_list {
4404         my $order = $input_params{'order'};
4405         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4406                 die_error(400, "Unknown order parameter");
4407         }
4408
4409         my @list = git_get_projects_list();
4410         if (!@list) {
4411                 die_error(404, "No projects found");
4412         }
4413
4414         git_header_html();
4415         if (-f $home_text) {
4416                 print "<div class=\"index_include\">\n";
4417                 insert_file($home_text);
4418                 print "</div>\n";
4419         }
4420         print $cgi->startform(-method => "get") .
4421               "<p class=\"projsearch\">Search:\n" .
4422               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4423               "</p>" .
4424               $cgi->end_form() . "\n";
4425         git_project_list_body(\@list, $order);
4426         git_footer_html();
4427 }
4428
4429 sub git_forks {
4430         my $order = $input_params{'order'};
4431         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4432                 die_error(400, "Unknown order parameter");
4433         }
4434
4435         my @list = git_get_projects_list($project);
4436         if (!@list) {
4437                 die_error(404, "No forks found");
4438         }
4439
4440         git_header_html();
4441         git_print_page_nav('','');
4442         git_print_header_div('summary', "$project forks");
4443         git_project_list_body(\@list, $order);
4444         git_footer_html();
4445 }
4446
4447 sub git_project_index {
4448         my @projects = git_get_projects_list($project);
4449
4450         print $cgi->header(
4451                 -type => 'text/plain',
4452                 -charset => 'utf-8',
4453                 -content_disposition => 'inline; filename="index.aux"');
4454
4455         foreach my $pr (@projects) {
4456                 if (!exists $pr->{'owner'}) {
4457                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4458                 }
4459
4460                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4461                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4462                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4463                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4464                 $path  =~ s/ /\+/g;
4465                 $owner =~ s/ /\+/g;
4466
4467                 print "$path $owner\n";
4468         }
4469 }
4470
4471 sub git_summary {
4472         my $descr = git_get_project_description($project) || "none";
4473         my %co = parse_commit("HEAD");
4474         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4475         my $head = $co{'id'};
4476
4477         my $owner = git_get_project_owner($project);
4478
4479         my $refs = git_get_references();
4480         # These get_*_list functions return one more to allow us to see if
4481         # there are more ...
4482         my @taglist  = git_get_tags_list(16);
4483         my @headlist = git_get_heads_list(16);
4484         my @forklist;
4485         my $check_forks = gitweb_check_feature('forks');
4486
4487         if ($check_forks) {
4488                 @forklist = git_get_projects_list($project);
4489         }
4490
4491         git_header_html();
4492         git_print_page_nav('summary','', $head);
4493
4494         print "<div class=\"title\">&nbsp;</div>\n";
4495         print "<table class=\"projects_list\">\n" .
4496               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4497               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4498         if (defined $cd{'rfc2822'}) {
4499                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4500         }
4501
4502         # use per project git URL list in $projectroot/$project/cloneurl
4503         # or make project git URL from git base URL and project name
4504         my $url_tag = "URL";
4505         my @url_list = git_get_project_url_list($project);
4506         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4507         foreach my $git_url (@url_list) {
4508                 next unless $git_url;
4509                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4510                 $url_tag = "";
4511         }
4512
4513         # Tag cloud
4514         my $show_ctags = gitweb_check_feature('ctags');
4515         if ($show_ctags) {
4516                 my $ctags = git_get_project_ctags($project);
4517                 my $cloud = git_populate_project_tagcloud($ctags);
4518                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4519                 print "</td>\n<td>" unless %$ctags;
4520                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4521                 print "</td>\n<td>" if %$ctags;
4522                 print git_show_project_tagcloud($cloud, 48);
4523                 print "</td></tr>";
4524         }
4525
4526         print "</table>\n";
4527
4528         # If XSS prevention is on, we don't include README.html.
4529         # TODO: Allow a readme in some safe format.
4530         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4531                 print "<div class=\"title\">readme</div>\n" .
4532                       "<div class=\"readme\">\n";
4533                 insert_file("$projectroot/$project/README.html");
4534                 print "\n</div>\n"; # class="readme"
4535         }
4536
4537         # we need to request one more than 16 (0..15) to check if
4538         # those 16 are all
4539         my @commitlist = $head ? parse_commits($head, 17) : ();
4540         if (@commitlist) {
4541                 git_print_header_div('shortlog');
4542                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4543                                   $#commitlist <=  15 ? undef :
4544                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4545         }
4546
4547         if (@taglist) {
4548                 git_print_header_div('tags');
4549                 git_tags_body(\@taglist, 0, 15,
4550                               $#taglist <=  15 ? undef :
4551                               $cgi->a({-href => href(action=>"tags")}, "..."));
4552         }
4553
4554         if (@headlist) {
4555                 git_print_header_div('heads');
4556                 git_heads_body(\@headlist, $head, 0, 15,
4557                                $#headlist <= 15 ? undef :
4558                                $cgi->a({-href => href(action=>"heads")}, "..."));
4559         }
4560
4561         if (@forklist) {
4562                 git_print_header_div('forks');
4563                 git_project_list_body(\@forklist, 'age', 0, 15,
4564                                       $#forklist <= 15 ? undef :
4565                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4566                                       'no_header');
4567         }
4568
4569         git_footer_html();
4570 }
4571
4572 sub git_tag {
4573         my $head = git_get_head_hash($project);
4574         git_header_html();
4575         git_print_page_nav('','', $head,undef,$head);
4576         my %tag = parse_tag($hash);
4577
4578         if (! %tag) {
4579                 die_error(404, "Unknown tag object");
4580         }
4581
4582         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4583         print "<div class=\"title_text\">\n" .
4584               "<table class=\"object_header\">\n" .
4585               "<tr>\n" .
4586               "<td>object</td>\n" .
4587               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4588                                $tag{'object'}) . "</td>\n" .
4589               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4590                                               $tag{'type'}) . "</td>\n" .
4591               "</tr>\n";
4592         if (defined($tag{'author'})) {
4593                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4594                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4595                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4596                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4597                         "</td></tr>\n";
4598         }
4599         print "</table>\n\n" .
4600               "</div>\n";
4601         print "<div class=\"page_body\">";
4602         my $comment = $tag{'comment'};
4603         foreach my $line (@$comment) {
4604                 chomp $line;
4605                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4606         }
4607         print "</div>\n";
4608         git_footer_html();
4609 }
4610
4611 sub git_blame {
4612         # permissions
4613         gitweb_check_feature('blame')
4614                 or die_error(403, "Blame view not allowed");
4615
4616         # error checking
4617         die_error(400, "No file name given") unless $file_name;
4618         $hash_base ||= git_get_head_hash($project);
4619         die_error(404, "Couldn't find base commit") unless $hash_base;
4620         my %co = parse_commit($hash_base)
4621                 or die_error(404, "Commit not found");
4622         my $ftype = "blob";
4623         if (!defined $hash) {
4624                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4625                         or die_error(404, "Error looking up file");
4626         } else {
4627                 $ftype = git_get_type($hash);
4628                 if ($ftype !~ "blob") {
4629                         die_error(400, "Object is not a blob");
4630                 }
4631         }
4632
4633         # run git-blame --porcelain
4634         open my $fd, "-|", git_cmd(), "blame", '-p',
4635                 $hash_base, '--', $file_name
4636                 or die_error(500, "Open git-blame failed");
4637
4638         # page header
4639         git_header_html();
4640         my $formats_nav =
4641                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4642                         "blob") .
4643                 " | " .
4644                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4645                         "history") .
4646                 " | " .
4647                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4648                         "HEAD");
4649         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4650         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4651         git_print_page_path($file_name, $ftype, $hash_base);
4652
4653         # page body
4654         my @rev_color = qw(light2 dark2);
4655         my $num_colors = scalar(@rev_color);
4656         my $current_color = 0;
4657         my %metainfo = ();
4658
4659         print <<HTML;
4660 <div class="page_body">
4661 <table class="blame">
4662 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4663 HTML
4664  LINE:
4665         while (my $line = <$fd>) {
4666                 chomp $line;
4667                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4668                 # no <lines in group> for subsequent lines in group of lines
4669                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4670                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4671                 if (!exists $metainfo{$full_rev}) {
4672                         $metainfo{$full_rev} = {};
4673                 }
4674                 my $meta = $metainfo{$full_rev};
4675                 my $data;
4676                 while ($data = <$fd>) {
4677                         chomp $data;
4678                         last if ($data =~ s/^\t//); # contents of line
4679                         if ($data =~ /^(\S+) (.*)$/) {
4680                                 $meta->{$1} = $2;
4681                         }
4682                 }
4683                 my $short_rev = substr($full_rev, 0, 8);
4684                 my $author = $meta->{'author'};
4685                 my %date =
4686                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4687                 my $date = $date{'iso-tz'};
4688                 if ($group_size) {
4689                         $current_color = ($current_color + 1) % $num_colors;
4690                 }
4691                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4692                 if ($group_size) {
4693                         print "<td class=\"sha1\"";
4694                         print " title=\"". esc_html($author) . ", $date\"";
4695                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4696                         print ">";
4697                         print $cgi->a({-href => href(action=>"commit",
4698                                                      hash=>$full_rev,
4699                                                      file_name=>$file_name)},
4700                                       esc_html($short_rev));
4701                         print "</td>\n";
4702                 }
4703                 my $parent_commit;
4704                 if (!exists $meta->{'parent'}) {
4705                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4706                                 or die_error(500, "Open git-rev-parse failed");
4707                         $parent_commit = <$dd>;
4708                         close $dd;
4709                         chomp($parent_commit);
4710                         $meta->{'parent'} = $parent_commit;
4711                 } else {
4712                         $parent_commit = $meta->{'parent'};
4713                 }
4714                 my $blamed = href(action => 'blame',
4715                                   file_name => $meta->{'filename'},
4716                                   hash_base => $parent_commit);
4717                 print "<td class=\"linenr\">";
4718                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4719                                 -class => "linenr" },
4720                               esc_html($lineno));
4721                 print "</td>";
4722                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4723                 print "</tr>\n";
4724         }
4725         print "</table>\n";
4726         print "</div>";
4727         close $fd
4728                 or print "Reading blob failed\n";
4729
4730         # page footer
4731         git_footer_html();
4732 }
4733
4734 sub git_tags {
4735         my $head = git_get_head_hash($project);
4736         git_header_html();
4737         git_print_page_nav('','', $head,undef,$head);
4738         git_print_header_div('summary', $project);
4739
4740         my @tagslist = git_get_tags_list();
4741         if (@tagslist) {
4742                 git_tags_body(\@tagslist);
4743         }
4744         git_footer_html();
4745 }
4746
4747 sub git_heads {
4748         my $head = git_get_head_hash($project);
4749         git_header_html();
4750         git_print_page_nav('','', $head,undef,$head);
4751         git_print_header_div('summary', $project);
4752
4753         my @headslist = git_get_heads_list();
4754         if (@headslist) {
4755                 git_heads_body(\@headslist, $head);
4756         }
4757         git_footer_html();
4758 }
4759
4760 sub git_blob_plain {
4761         my $type = shift;
4762         my $expires;
4763
4764         if (!defined $hash) {
4765                 if (defined $file_name) {
4766                         my $base = $hash_base || git_get_head_hash($project);
4767                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4768                                 or die_error(404, "Cannot find file");
4769                 } else {
4770                         die_error(400, "No file name defined");
4771                 }
4772         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4773                 # blobs defined by non-textual hash id's can be cached
4774                 $expires = "+1d";
4775         }
4776
4777         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4778                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4779
4780         # content-type (can include charset)
4781         $type = blob_contenttype($fd, $file_name, $type);
4782
4783         # "save as" filename, even when no $file_name is given
4784         my $save_as = "$hash";
4785         if (defined $file_name) {
4786                 $save_as = $file_name;
4787         } elsif ($type =~ m/^text\//) {
4788                 $save_as .= '.txt';
4789         }
4790
4791         # With XSS prevention on, blobs of all types except a few known safe
4792         # ones are served with "Content-Disposition: attachment" to make sure
4793         # they don't run in our security domain.  For certain image types,
4794         # blob view writes an <img> tag referring to blob_plain view, and we
4795         # want to be sure not to break that by serving the image as an
4796         # attachment (though Firefox 3 doesn't seem to care).
4797         my $sandbox = $prevent_xss &&
4798                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4799
4800         print $cgi->header(
4801                 -type => $type,
4802                 -expires => $expires,
4803                 -content_disposition =>
4804                         ($sandbox ? 'attachment' : 'inline')
4805                         . '; filename="' . $save_as . '"');
4806         undef $/;
4807         binmode STDOUT, ':raw';
4808         print <$fd>;
4809         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4810         $/ = "\n";
4811         close $fd;
4812 }
4813
4814 sub git_blob {
4815         my $expires;
4816
4817         if (!defined $hash) {
4818                 if (defined $file_name) {
4819                         my $base = $hash_base || git_get_head_hash($project);
4820                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4821                                 or die_error(404, "Cannot find file");
4822                 } else {
4823                         die_error(400, "No file name defined");
4824                 }
4825         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4826                 # blobs defined by non-textual hash id's can be cached
4827                 $expires = "+1d";
4828         }
4829
4830         my $have_blame = gitweb_check_feature('blame');
4831         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4832                 or die_error(500, "Couldn't cat $file_name, $hash");
4833         my $mimetype = blob_mimetype($fd, $file_name);
4834         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4835                 close $fd;
4836                 return git_blob_plain($mimetype);
4837         }
4838         # we can have blame only for text/* mimetype
4839         $have_blame &&= ($mimetype =~ m!^text/!);
4840
4841         git_header_html(undef, $expires);
4842         my $formats_nav = '';
4843         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4844                 if (defined $file_name) {
4845                         if ($have_blame) {
4846                                 $formats_nav .=
4847                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4848                                                 "blame") .
4849                                         " | ";
4850                         }
4851                         $formats_nav .=
4852                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4853                                         "history") .
4854                                 " | " .
4855                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4856                                         "raw") .
4857                                 " | " .
4858                                 $cgi->a({-href => href(action=>"blob",
4859                                                        hash_base=>"HEAD", file_name=>$file_name)},
4860                                         "HEAD");
4861                 } else {
4862                         $formats_nav .=
4863                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4864                                         "raw");
4865                 }
4866                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4867                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4868         } else {
4869                 print "<div class=\"page_nav\">\n" .
4870                       "<br/><br/></div>\n" .
4871                       "<div class=\"title\">$hash</div>\n";
4872         }
4873         git_print_page_path($file_name, "blob", $hash_base);
4874         print "<div class=\"page_body\">\n";
4875         if ($mimetype =~ m!^image/!) {
4876                 print qq!<img type="$mimetype"!;
4877                 if ($file_name) {
4878                         print qq! alt="$file_name" title="$file_name"!;
4879                 }
4880                 print qq! src="! .
4881                       href(action=>"blob_plain", hash=>$hash,
4882                            hash_base=>$hash_base, file_name=>$file_name) .
4883                       qq!" />\n!;
4884         } else {
4885                 my $nr;
4886                 while (my $line = <$fd>) {
4887                         chomp $line;
4888                         $nr++;
4889                         $line = untabify($line);
4890                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4891                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4892                 }
4893         }
4894         close $fd
4895                 or print "Reading blob failed.\n";
4896         print "</div>";
4897         git_footer_html();
4898 }
4899
4900 sub git_tree {
4901         if (!defined $hash_base) {
4902                 $hash_base = "HEAD";
4903         }
4904         if (!defined $hash) {
4905                 if (defined $file_name) {
4906                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4907                 } else {
4908                         $hash = $hash_base;
4909                 }
4910         }
4911         die_error(404, "No such tree") unless defined($hash);
4912         $/ = "\0";
4913         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4914                 or die_error(500, "Open git-ls-tree failed");
4915         my @entries = map { chomp; $_ } <$fd>;
4916         close $fd or die_error(404, "Reading tree failed");
4917         $/ = "\n";
4918
4919         my $refs = git_get_references();
4920         my $ref = format_ref_marker($refs, $hash_base);
4921         git_header_html();
4922         my $basedir = '';
4923         my $have_blame = gitweb_check_feature('blame');
4924         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4925                 my @views_nav = ();
4926                 if (defined $file_name) {
4927                         push @views_nav,
4928                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4929                                         "history"),
4930                                 $cgi->a({-href => href(action=>"tree",
4931                                                        hash_base=>"HEAD", file_name=>$file_name)},
4932                                         "HEAD"),
4933                 }
4934                 my $snapshot_links = format_snapshot_links($hash);
4935                 if (defined $snapshot_links) {
4936                         # FIXME: Should be available when we have no hash base as well.
4937                         push @views_nav, $snapshot_links;
4938                 }
4939                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4940                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4941         } else {
4942                 undef $hash_base;
4943                 print "<div class=\"page_nav\">\n";
4944                 print "<br/><br/></div>\n";
4945                 print "<div class=\"title\">$hash</div>\n";
4946         }
4947         if (defined $file_name) {
4948                 $basedir = $file_name;
4949                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4950                         $basedir .= '/';
4951                 }
4952                 git_print_page_path($file_name, 'tree', $hash_base);
4953         }
4954         print "<div class=\"page_body\">\n";
4955         print "<table class=\"tree\">\n";
4956         my $alternate = 1;
4957         # '..' (top directory) link if possible
4958         if (defined $hash_base &&
4959             defined $file_name && $file_name =~ m![^/]+$!) {
4960                 if ($alternate) {
4961                         print "<tr class=\"dark\">\n";
4962                 } else {
4963                         print "<tr class=\"light\">\n";
4964                 }
4965                 $alternate ^= 1;
4966
4967                 my $up = $file_name;
4968                 $up =~ s!/?[^/]+$!!;
4969                 undef $up unless $up;
4970                 # based on git_print_tree_entry
4971                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4972                 print '<td class="list">';
4973                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4974                                              file_name=>$up)},
4975                               "..");
4976                 print "</td>\n";
4977                 print "<td class=\"link\"></td>\n";
4978
4979                 print "</tr>\n";
4980         }
4981         foreach my $line (@entries) {
4982                 my %t = parse_ls_tree_line($line, -z => 1);
4983
4984                 if ($alternate) {
4985                         print "<tr class=\"dark\">\n";
4986                 } else {
4987                         print "<tr class=\"light\">\n";
4988                 }
4989                 $alternate ^= 1;
4990
4991                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4992
4993                 print "</tr>\n";
4994         }
4995         print "</table>\n" .
4996               "</div>";
4997         git_footer_html();
4998 }
4999
5000 sub git_snapshot {
5001         my $format = $input_params{'snapshot_format'};
5002         if (!@snapshot_fmts) {
5003                 die_error(403, "Snapshots not allowed");
5004         }
5005         # default to first supported snapshot format
5006         $format ||= $snapshot_fmts[0];
5007         if ($format !~ m/^[a-z0-9]+$/) {
5008                 die_error(400, "Invalid snapshot format parameter");
5009         } elsif (!exists($known_snapshot_formats{$format})) {
5010                 die_error(400, "Unknown snapshot format");
5011         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5012                 die_error(403, "Unsupported snapshot format");
5013         }
5014
5015         if (!defined $hash) {
5016                 $hash = git_get_head_hash($project);
5017         }
5018
5019         my $name = $project;
5020         $name =~ s,([^/])/*\.git$,$1,;
5021         $name = basename($name);
5022         my $filename = to_utf8($name);
5023         $name =~ s/\047/\047\\\047\047/g;
5024         my $cmd;
5025         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5026         $cmd = quote_command(
5027                 git_cmd(), 'archive',
5028                 "--format=$known_snapshot_formats{$format}{'format'}",
5029                 "--prefix=$name/", $hash);
5030         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5031                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5032         }
5033
5034         print $cgi->header(
5035                 -type => $known_snapshot_formats{$format}{'type'},
5036                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5037                 -status => '200 OK');
5038
5039         open my $fd, "-|", $cmd
5040                 or die_error(500, "Execute git-archive failed");
5041         binmode STDOUT, ':raw';
5042         print <$fd>;
5043         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5044         close $fd;
5045 }
5046
5047 sub git_log {
5048         my $head = git_get_head_hash($project);
5049         if (!defined $hash) {
5050                 $hash = $head;
5051         }
5052         if (!defined $page) {
5053                 $page = 0;
5054         }
5055         my $refs = git_get_references();
5056
5057         my @commitlist = parse_commits($hash, 101, (100 * $page));
5058
5059         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5060
5061         my ($patch_max) = gitweb_get_feature('patches');
5062         if ($patch_max) {
5063                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5064                         $paging_nav .= " &sdot; " .
5065                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5066                                         "patches");
5067                 }
5068         }
5069
5070         git_header_html();
5071         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5072
5073         if (!@commitlist) {
5074                 my %co = parse_commit($hash);
5075
5076                 git_print_header_div('summary', $project);
5077                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5078         }
5079         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5080         for (my $i = 0; $i <= $to; $i++) {
5081                 my %co = %{$commitlist[$i]};
5082                 next if !%co;
5083                 my $commit = $co{'id'};
5084                 my $ref = format_ref_marker($refs, $commit);
5085                 my %ad = parse_date($co{'author_epoch'});
5086                 git_print_header_div('commit',
5087                                "<span class=\"age\">$co{'age_string'}</span>" .
5088                                esc_html($co{'title'}) . $ref,
5089                                $commit);
5090                 print "<div class=\"title_text\">\n" .
5091                       "<div class=\"log_link\">\n" .
5092                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5093                       " | " .
5094                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5095                       " | " .
5096                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5097                       "<br/>\n" .
5098                       "</div>\n" .
5099                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5100                       "</div>\n";
5101
5102                 print "<div class=\"log_body\">\n";
5103                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5104                 print "</div>\n";
5105         }
5106         if ($#commitlist >= 100) {
5107                 print "<div class=\"page_nav\">\n";
5108                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5109                                -accesskey => "n", -title => "Alt-n"}, "next");
5110                 print "</div>\n";
5111         }
5112         git_footer_html();
5113 }
5114
5115 sub git_commit {
5116         $hash ||= $hash_base || "HEAD";
5117         my %co = parse_commit($hash)
5118             or die_error(404, "Unknown commit object");
5119         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5120         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5121
5122         my $parent  = $co{'parent'};
5123         my $parents = $co{'parents'}; # listref
5124
5125         # we need to prepare $formats_nav before any parameter munging
5126         my $formats_nav;
5127         if (!defined $parent) {
5128                 # --root commitdiff
5129                 $formats_nav .= '(initial)';
5130         } elsif (@$parents == 1) {
5131                 # single parent commit
5132                 $formats_nav .=
5133                         '(parent: ' .
5134                         $cgi->a({-href => href(action=>"commit",
5135                                                hash=>$parent)},
5136                                 esc_html(substr($parent, 0, 7))) .
5137                         ')';
5138         } else {
5139                 # merge commit
5140                 $formats_nav .=
5141                         '(merge: ' .
5142                         join(' ', map {
5143                                 $cgi->a({-href => href(action=>"commit",
5144                                                        hash=>$_)},
5145                                         esc_html(substr($_, 0, 7)));
5146                         } @$parents ) .
5147                         ')';
5148         }
5149         if (gitweb_check_feature('patches')) {
5150                 $formats_nav .= " | " .
5151                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5152                                 "patch");
5153         }
5154
5155         if (!defined $parent) {
5156                 $parent = "--root";
5157         }
5158         my @difftree;
5159         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5160                 @diff_opts,
5161                 (@$parents <= 1 ? $parent : '-c'),
5162                 $hash, "--"
5163                 or die_error(500, "Open git-diff-tree failed");
5164         @difftree = map { chomp; $_ } <$fd>;
5165         close $fd or die_error(404, "Reading git-diff-tree failed");
5166
5167         # non-textual hash id's can be cached
5168         my $expires;
5169         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5170                 $expires = "+1d";
5171         }
5172         my $refs = git_get_references();
5173         my $ref = format_ref_marker($refs, $co{'id'});
5174
5175         git_header_html(undef, $expires);
5176         git_print_page_nav('commit', '',
5177                            $hash, $co{'tree'}, $hash,
5178                            $formats_nav);
5179
5180         if (defined $co{'parent'}) {
5181                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5182         } else {
5183                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5184         }
5185         print "<div class=\"title_text\">\n" .
5186               "<table class=\"object_header\">\n";
5187         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5188               "<tr>" .
5189               "<td></td><td> $ad{'rfc2822'}";
5190         if ($ad{'hour_local'} < 6) {
5191                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5192                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5193         } else {
5194                 printf(" (%02d:%02d %s)",
5195                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5196         }
5197         print "</td>" .
5198               "</tr>\n";
5199         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5200         print "<tr><td></td><td> $cd{'rfc2822'}" .
5201               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5202               "</td></tr>\n";
5203         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5204         print "<tr>" .
5205               "<td>tree</td>" .
5206               "<td class=\"sha1\">" .
5207               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5208                        class => "list"}, $co{'tree'}) .
5209               "</td>" .
5210               "<td class=\"link\">" .
5211               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5212                       "tree");
5213         my $snapshot_links = format_snapshot_links($hash);
5214         if (defined $snapshot_links) {
5215                 print " | " . $snapshot_links;
5216         }
5217         print "</td>" .
5218               "</tr>\n";
5219
5220         foreach my $par (@$parents) {
5221                 print "<tr>" .
5222                       "<td>parent</td>" .
5223                       "<td class=\"sha1\">" .
5224                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5225                                class => "list"}, $par) .
5226                       "</td>" .
5227                       "<td class=\"link\">" .
5228                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5229                       " | " .
5230                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5231                       "</td>" .
5232                       "</tr>\n";
5233         }
5234         print "</table>".
5235               "</div>\n";
5236
5237         print "<div class=\"page_body\">\n";
5238         git_print_log($co{'comment'});
5239         print "</div>\n";
5240
5241         git_difftree_body(\@difftree, $hash, @$parents);
5242
5243         git_footer_html();
5244 }
5245
5246 sub git_object {
5247         # object is defined by:
5248         # - hash or hash_base alone
5249         # - hash_base and file_name
5250         my $type;
5251
5252         # - hash or hash_base alone
5253         if ($hash || ($hash_base && !defined $file_name)) {
5254                 my $object_id = $hash || $hash_base;
5255
5256                 open my $fd, "-|", quote_command(
5257                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5258                         or die_error(404, "Object does not exist");
5259                 $type = <$fd>;
5260                 chomp $type;
5261                 close $fd
5262                         or die_error(404, "Object does not exist");
5263
5264         # - hash_base and file_name
5265         } elsif ($hash_base && defined $file_name) {
5266                 $file_name =~ s,/+$,,;
5267
5268                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5269                         or die_error(404, "Base object does not exist");
5270
5271                 # here errors should not hapen
5272                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5273                         or die_error(500, "Open git-ls-tree failed");
5274                 my $line = <$fd>;
5275                 close $fd;
5276
5277                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5278                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5279                         die_error(404, "File or directory for given base does not exist");
5280                 }
5281                 $type = $2;
5282                 $hash = $3;
5283         } else {
5284                 die_error(400, "Not enough information to find object");
5285         }
5286
5287         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5288                                           hash=>$hash, hash_base=>$hash_base,
5289                                           file_name=>$file_name),
5290                              -status => '302 Found');
5291 }
5292
5293 sub git_blobdiff {
5294         my $format = shift || 'html';
5295
5296         my $fd;
5297         my @difftree;
5298         my %diffinfo;
5299         my $expires;
5300
5301         # preparing $fd and %diffinfo for git_patchset_body
5302         # new style URI
5303         if (defined $hash_base && defined $hash_parent_base) {
5304                 if (defined $file_name) {
5305                         # read raw output
5306                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5307                                 $hash_parent_base, $hash_base,
5308                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5309                                 or die_error(500, "Open git-diff-tree failed");
5310                         @difftree = map { chomp; $_ } <$fd>;
5311                         close $fd
5312                                 or die_error(404, "Reading git-diff-tree failed");
5313                         @difftree
5314                                 or die_error(404, "Blob diff not found");
5315
5316                 } elsif (defined $hash &&
5317                          $hash =~ /[0-9a-fA-F]{40}/) {
5318                         # try to find filename from $hash
5319
5320                         # read filtered raw output
5321                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5322                                 $hash_parent_base, $hash_base, "--"
5323                                 or die_error(500, "Open git-diff-tree failed");
5324                         @difftree =
5325                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5326                                 # $hash == to_id
5327                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5328                                 map { chomp; $_ } <$fd>;
5329                         close $fd
5330                                 or die_error(404, "Reading git-diff-tree failed");
5331                         @difftree
5332                                 or die_error(404, "Blob diff not found");
5333
5334                 } else {
5335                         die_error(400, "Missing one of the blob diff parameters");
5336                 }
5337
5338                 if (@difftree > 1) {
5339                         die_error(400, "Ambiguous blob diff specification");
5340                 }
5341
5342                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5343                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5344                 $file_name   ||= $diffinfo{'to_file'};
5345
5346                 $hash_parent ||= $diffinfo{'from_id'};
5347                 $hash        ||= $diffinfo{'to_id'};
5348
5349                 # non-textual hash id's can be cached
5350                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5351                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5352                         $expires = '+1d';
5353                 }
5354
5355                 # open patch output
5356                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5357                         '-p', ($format eq 'html' ? "--full-index" : ()),
5358                         $hash_parent_base, $hash_base,
5359                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5360                         or die_error(500, "Open git-diff-tree failed");
5361         }
5362
5363         # old/legacy style URI -- not generated anymore since 1.4.3.
5364         if (!%diffinfo) {
5365                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5366         }
5367
5368         # header
5369         if ($format eq 'html') {
5370                 my $formats_nav =
5371                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5372                                 "raw");
5373                 git_header_html(undef, $expires);
5374                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5375                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5376                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5377                 } else {
5378                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5379                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5380                 }
5381                 if (defined $file_name) {
5382                         git_print_page_path($file_name, "blob", $hash_base);
5383                 } else {
5384                         print "<div class=\"page_path\"></div>\n";
5385                 }
5386
5387         } elsif ($format eq 'plain') {
5388                 print $cgi->header(
5389                         -type => 'text/plain',
5390                         -charset => 'utf-8',
5391                         -expires => $expires,
5392                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5393
5394                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5395
5396         } else {
5397                 die_error(400, "Unknown blobdiff format");
5398         }
5399
5400         # patch
5401         if ($format eq 'html') {
5402                 print "<div class=\"page_body\">\n";
5403
5404                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5405                 close $fd;
5406
5407                 print "</div>\n"; # class="page_body"
5408                 git_footer_html();
5409
5410         } else {
5411                 while (my $line = <$fd>) {
5412                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5413                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5414
5415                         print $line;
5416
5417                         last if $line =~ m!^\+\+\+!;
5418                 }
5419                 local $/ = undef;
5420                 print <$fd>;
5421                 close $fd;
5422         }
5423 }
5424
5425 sub git_blobdiff_plain {
5426         git_blobdiff('plain');
5427 }
5428
5429 sub git_commitdiff {
5430         my %params = @_;
5431         my $format = $params{-format} || 'html';
5432
5433         my ($patch_max) = gitweb_get_feature('patches');
5434         if ($format eq 'patch') {
5435                 die_error(403, "Patch view not allowed") unless $patch_max;
5436         }
5437
5438         $hash ||= $hash_base || "HEAD";
5439         my %co = parse_commit($hash)
5440             or die_error(404, "Unknown commit object");
5441
5442         # choose format for commitdiff for merge
5443         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5444                 $hash_parent = '--cc';
5445         }
5446         # we need to prepare $formats_nav before almost any parameter munging
5447         my $formats_nav;
5448         if ($format eq 'html') {
5449                 $formats_nav =
5450                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5451                                 "raw");
5452                 if ($patch_max) {
5453                         $formats_nav .= " | " .
5454                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5455                                         "patch");
5456                 }
5457
5458                 if (defined $hash_parent &&
5459                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5460                         # commitdiff with two commits given
5461                         my $hash_parent_short = $hash_parent;
5462                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5463                                 $hash_parent_short = substr($hash_parent, 0, 7);
5464                         }
5465                         $formats_nav .=
5466                                 ' (from';
5467                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5468                                 if ($co{'parents'}[$i] eq $hash_parent) {
5469                                         $formats_nav .= ' parent ' . ($i+1);
5470                                         last;
5471                                 }
5472                         }
5473                         $formats_nav .= ': ' .
5474                                 $cgi->a({-href => href(action=>"commitdiff",
5475                                                        hash=>$hash_parent)},
5476                                         esc_html($hash_parent_short)) .
5477                                 ')';
5478                 } elsif (!$co{'parent'}) {
5479                         # --root commitdiff
5480                         $formats_nav .= ' (initial)';
5481                 } elsif (scalar @{$co{'parents'}} == 1) {
5482                         # single parent commit
5483                         $formats_nav .=
5484                                 ' (parent: ' .
5485                                 $cgi->a({-href => href(action=>"commitdiff",
5486                                                        hash=>$co{'parent'})},
5487                                         esc_html(substr($co{'parent'}, 0, 7))) .
5488                                 ')';
5489                 } else {
5490                         # merge commit
5491                         if ($hash_parent eq '--cc') {
5492                                 $formats_nav .= ' | ' .
5493                                         $cgi->a({-href => href(action=>"commitdiff",
5494                                                                hash=>$hash, hash_parent=>'-c')},
5495                                                 'combined');
5496                         } else { # $hash_parent eq '-c'
5497                                 $formats_nav .= ' | ' .
5498                                         $cgi->a({-href => href(action=>"commitdiff",
5499                                                                hash=>$hash, hash_parent=>'--cc')},
5500                                                 'compact');
5501                         }
5502                         $formats_nav .=
5503                                 ' (merge: ' .
5504                                 join(' ', map {
5505                                         $cgi->a({-href => href(action=>"commitdiff",
5506                                                                hash=>$_)},
5507                                                 esc_html(substr($_, 0, 7)));
5508                                 } @{$co{'parents'}} ) .
5509                                 ')';
5510                 }
5511         }
5512
5513         my $hash_parent_param = $hash_parent;
5514         if (!defined $hash_parent_param) {
5515                 # --cc for multiple parents, --root for parentless
5516                 $hash_parent_param =
5517                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5518         }
5519
5520         # read commitdiff
5521         my $fd;
5522         my @difftree;
5523         if ($format eq 'html') {
5524                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5525                         "--no-commit-id", "--patch-with-raw", "--full-index",
5526                         $hash_parent_param, $hash, "--"
5527                         or die_error(500, "Open git-diff-tree failed");
5528
5529                 while (my $line = <$fd>) {
5530                         chomp $line;
5531                         # empty line ends raw part of diff-tree output
5532                         last unless $line;
5533                         push @difftree, scalar parse_difftree_raw_line($line);
5534                 }
5535
5536         } elsif ($format eq 'plain') {
5537                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5538                         '-p', $hash_parent_param, $hash, "--"
5539                         or die_error(500, "Open git-diff-tree failed");
5540         } elsif ($format eq 'patch') {
5541                 # For commit ranges, we limit the output to the number of
5542                 # patches specified in the 'patches' feature.
5543                 # For single commits, we limit the output to a single patch,
5544                 # diverging from the git-format-patch default.
5545                 my @commit_spec = ();
5546                 if ($hash_parent) {
5547                         if ($patch_max > 0) {
5548                                 push @commit_spec, "-$patch_max";
5549                         }
5550                         push @commit_spec, '-n', "$hash_parent..$hash";
5551                 } else {
5552                         if ($params{-single}) {
5553                                 push @commit_spec, '-1';
5554                         } else {
5555                                 if ($patch_max > 0) {
5556                                         push @commit_spec, "-$patch_max";
5557                                 }
5558                                 push @commit_spec, "-n";
5559                         }
5560                         push @commit_spec, '--root', $hash;
5561                 }
5562                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5563                         '--stdout', @commit_spec
5564                         or die_error(500, "Open git-format-patch failed");
5565         } else {
5566                 die_error(400, "Unknown commitdiff format");
5567         }
5568
5569         # non-textual hash id's can be cached
5570         my $expires;
5571         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5572                 $expires = "+1d";
5573         }
5574
5575         # write commit message
5576         if ($format eq 'html') {
5577                 my $refs = git_get_references();
5578                 my $ref = format_ref_marker($refs, $co{'id'});
5579
5580                 git_header_html(undef, $expires);
5581                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5582                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5583                 git_print_authorship(\%co);
5584                 print "<div class=\"page_body\">\n";
5585                 if (@{$co{'comment'}} > 1) {
5586                         print "<div class=\"log\">\n";
5587                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5588                         print "</div>\n"; # class="log"
5589                 }
5590
5591         } elsif ($format eq 'plain') {
5592                 my $refs = git_get_references("tags");
5593                 my $tagname = git_get_rev_name_tags($hash);
5594                 my $filename = basename($project) . "-$hash.patch";
5595
5596                 print $cgi->header(
5597                         -type => 'text/plain',
5598                         -charset => 'utf-8',
5599                         -expires => $expires,
5600                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5601                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5602                 print "From: " . to_utf8($co{'author'}) . "\n";
5603                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5604                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5605
5606                 print "X-Git-Tag: $tagname\n" if $tagname;
5607                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5608
5609                 foreach my $line (@{$co{'comment'}}) {
5610                         print to_utf8($line) . "\n";
5611                 }
5612                 print "---\n\n";
5613         } elsif ($format eq 'patch') {
5614                 my $filename = basename($project) . "-$hash.patch";
5615
5616                 print $cgi->header(
5617                         -type => 'text/plain',
5618                         -charset => 'utf-8',
5619                         -expires => $expires,
5620                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5621         }
5622
5623         # write patch
5624         if ($format eq 'html') {
5625                 my $use_parents = !defined $hash_parent ||
5626                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5627                 git_difftree_body(\@difftree, $hash,
5628                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5629                 print "<br/>\n";
5630
5631                 git_patchset_body($fd, \@difftree, $hash,
5632                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5633                 close $fd;
5634                 print "</div>\n"; # class="page_body"
5635                 git_footer_html();
5636
5637         } elsif ($format eq 'plain') {
5638                 local $/ = undef;
5639                 print <$fd>;
5640                 close $fd
5641                         or print "Reading git-diff-tree failed\n";
5642         } elsif ($format eq 'patch') {
5643                 local $/ = undef;
5644                 print <$fd>;
5645                 close $fd
5646                         or print "Reading git-format-patch failed\n";
5647         }
5648 }
5649
5650 sub git_commitdiff_plain {
5651         git_commitdiff(-format => 'plain');
5652 }
5653
5654 # format-patch-style patches
5655 sub git_patch {
5656         git_commitdiff(-format => 'patch', -single=> 1);
5657 }
5658
5659 sub git_patches {
5660         git_commitdiff(-format => 'patch');
5661 }
5662
5663 sub git_history {
5664         if (!defined $hash_base) {
5665                 $hash_base = git_get_head_hash($project);
5666         }
5667         if (!defined $page) {
5668                 $page = 0;
5669         }
5670         my $ftype;
5671         my %co = parse_commit($hash_base)
5672             or die_error(404, "Unknown commit object");
5673
5674         my $refs = git_get_references();
5675         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5676
5677         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5678                                        $file_name, "--full-history")
5679             or die_error(404, "No such file or directory on given branch");
5680
5681         if (!defined $hash && defined $file_name) {
5682                 # some commits could have deleted file in question,
5683                 # and not have it in tree, but one of them has to have it
5684                 for (my $i = 0; $i <= @commitlist; $i++) {
5685                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5686                         last if defined $hash;
5687                 }
5688         }
5689         if (defined $hash) {
5690                 $ftype = git_get_type($hash);
5691         }
5692         if (!defined $ftype) {
5693                 die_error(500, "Unknown type of object");
5694         }
5695
5696         my $paging_nav = '';
5697         if ($page > 0) {
5698                 $paging_nav .=
5699                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5700                                                file_name=>$file_name)},
5701                                 "first");
5702                 $paging_nav .= " &sdot; " .
5703                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5704                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5705         } else {
5706                 $paging_nav .= "first";
5707                 $paging_nav .= " &sdot; prev";
5708         }
5709         my $next_link = '';
5710         if ($#commitlist >= 100) {
5711                 $next_link =
5712                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5713                                  -accesskey => "n", -title => "Alt-n"}, "next");
5714                 $paging_nav .= " &sdot; $next_link";
5715         } else {
5716                 $paging_nav .= " &sdot; next";
5717         }
5718
5719         git_header_html();
5720         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5721         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5722         git_print_page_path($file_name, $ftype, $hash_base);
5723
5724         git_history_body(\@commitlist, 0, 99,
5725                          $refs, $hash_base, $ftype, $next_link);
5726
5727         git_footer_html();
5728 }
5729
5730 sub git_search {
5731         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5732         if (!defined $searchtext) {
5733                 die_error(400, "Text field is empty");
5734         }
5735         if (!defined $hash) {
5736                 $hash = git_get_head_hash($project);
5737         }
5738         my %co = parse_commit($hash);
5739         if (!%co) {
5740                 die_error(404, "Unknown commit object");
5741         }
5742         if (!defined $page) {
5743                 $page = 0;
5744         }
5745
5746         $searchtype ||= 'commit';
5747         if ($searchtype eq 'pickaxe') {
5748                 # pickaxe may take all resources of your box and run for several minutes
5749                 # with every query - so decide by yourself how public you make this feature
5750                 gitweb_check_feature('pickaxe')
5751                     or die_error(403, "Pickaxe is disabled");
5752         }
5753         if ($searchtype eq 'grep') {
5754                 gitweb_check_feature('grep')
5755                     or die_error(403, "Grep is disabled");
5756         }
5757
5758         git_header_html();
5759
5760         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5761                 my $greptype;
5762                 if ($searchtype eq 'commit') {
5763                         $greptype = "--grep=";
5764                 } elsif ($searchtype eq 'author') {
5765                         $greptype = "--author=";
5766                 } elsif ($searchtype eq 'committer') {
5767                         $greptype = "--committer=";
5768                 }
5769                 $greptype .= $searchtext;
5770                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5771                                                $greptype, '--regexp-ignore-case',
5772                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5773
5774                 my $paging_nav = '';
5775                 if ($page > 0) {
5776                         $paging_nav .=
5777                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5778                                                        searchtext=>$searchtext,
5779                                                        searchtype=>$searchtype)},
5780                                         "first");
5781                         $paging_nav .= " &sdot; " .
5782                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5783                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5784                 } else {
5785                         $paging_nav .= "first";
5786                         $paging_nav .= " &sdot; prev";
5787                 }
5788                 my $next_link = '';
5789                 if ($#commitlist >= 100) {
5790                         $next_link =
5791                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5792                                          -accesskey => "n", -title => "Alt-n"}, "next");
5793                         $paging_nav .= " &sdot; $next_link";
5794                 } else {
5795                         $paging_nav .= " &sdot; next";
5796                 }
5797
5798                 if ($#commitlist >= 100) {
5799                 }
5800
5801                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5802                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5803                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5804         }
5805
5806         if ($searchtype eq 'pickaxe') {
5807                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5808                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5809
5810                 print "<table class=\"pickaxe search\">\n";
5811                 my $alternate = 1;
5812                 $/ = "\n";
5813                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5814                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5815                         ($search_use_regexp ? '--pickaxe-regex' : ());
5816                 undef %co;
5817                 my @files;
5818                 while (my $line = <$fd>) {
5819                         chomp $line;
5820                         next unless $line;
5821
5822                         my %set = parse_difftree_raw_line($line);
5823                         if (defined $set{'commit'}) {
5824                                 # finish previous commit
5825                                 if (%co) {
5826                                         print "</td>\n" .
5827                                               "<td class=\"link\">" .
5828                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5829                                               " | " .
5830                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5831                                         print "</td>\n" .
5832                                               "</tr>\n";
5833                                 }
5834
5835                                 if ($alternate) {
5836                                         print "<tr class=\"dark\">\n";
5837                                 } else {
5838                                         print "<tr class=\"light\">\n";
5839                                 }
5840                                 $alternate ^= 1;
5841                                 %co = parse_commit($set{'commit'});
5842                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5843                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5844                                       "<td><i>$author</i></td>\n" .
5845                                       "<td>" .
5846                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5847                                               -class => "list subject"},
5848                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5849                         } elsif (defined $set{'to_id'}) {
5850                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5851
5852                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5853                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5854                                               -class => "list"},
5855                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5856                                       "<br/>\n";
5857                         }
5858                 }
5859                 close $fd;
5860
5861                 # finish last commit (warning: repetition!)
5862                 if (%co) {
5863                         print "</td>\n" .
5864                               "<td class=\"link\">" .
5865                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5866                               " | " .
5867                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5868                         print "</td>\n" .
5869                               "</tr>\n";
5870                 }
5871
5872                 print "</table>\n";
5873         }
5874
5875         if ($searchtype eq 'grep') {
5876                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5877                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5878
5879                 print "<table class=\"grep_search\">\n";
5880                 my $alternate = 1;
5881                 my $matches = 0;
5882                 $/ = "\n";
5883                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5884                         $search_use_regexp ? ('-E', '-i') : '-F',
5885                         $searchtext, $co{'tree'};
5886                 my $lastfile = '';
5887                 while (my $line = <$fd>) {
5888                         chomp $line;
5889                         my ($file, $lno, $ltext, $binary);
5890                         last if ($matches++ > 1000);
5891                         if ($line =~ /^Binary file (.+) matches$/) {
5892                                 $file = $1;
5893                                 $binary = 1;
5894                         } else {
5895                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5896                         }
5897                         if ($file ne $lastfile) {
5898                                 $lastfile and print "</td></tr>\n";
5899                                 if ($alternate++) {
5900                                         print "<tr class=\"dark\">\n";
5901                                 } else {
5902                                         print "<tr class=\"light\">\n";
5903                                 }
5904                                 print "<td class=\"list\">".
5905                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5906                                                                file_name=>"$file"),
5907                                                 -class => "list"}, esc_path($file));
5908                                 print "</td><td>\n";
5909                                 $lastfile = $file;
5910                         }
5911                         if ($binary) {
5912                                 print "<div class=\"binary\">Binary file</div>\n";
5913                         } else {
5914                                 $ltext = untabify($ltext);
5915                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5916                                         $ltext = esc_html($1, -nbsp=>1);
5917                                         $ltext .= '<span class="match">';
5918                                         $ltext .= esc_html($2, -nbsp=>1);
5919                                         $ltext .= '</span>';
5920                                         $ltext .= esc_html($3, -nbsp=>1);
5921                                 } else {
5922                                         $ltext = esc_html($ltext, -nbsp=>1);
5923                                 }
5924                                 print "<div class=\"pre\">" .
5925                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5926                                                                file_name=>"$file").'#l'.$lno,
5927                                                 -class => "linenr"}, sprintf('%4i', $lno))
5928                                         . ' ' .  $ltext . "</div>\n";
5929                         }
5930                 }
5931                 if ($lastfile) {
5932                         print "</td></tr>\n";
5933                         if ($matches > 1000) {
5934                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5935                         }
5936                 } else {
5937                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5938                 }
5939                 close $fd;
5940
5941                 print "</table>\n";
5942         }
5943         git_footer_html();
5944 }
5945
5946 sub git_search_help {
5947         git_header_html();
5948         git_print_page_nav('','', $hash,$hash,$hash);
5949         print <<EOT;
5950 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5951 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5952 the pattern entered is recognized as the POSIX extended
5953 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5954 insensitive).</p>
5955 <dl>
5956 <dt><b>commit</b></dt>
5957 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5958 EOT
5959         my $have_grep = gitweb_check_feature('grep');
5960         if ($have_grep) {
5961                 print <<EOT;
5962 <dt><b>grep</b></dt>
5963 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5964     a different one) are searched for the given pattern. On large trees, this search can take
5965 a while and put some strain on the server, so please use it with some consideration. Note that
5966 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5967 case-sensitive.</dd>
5968 EOT
5969         }
5970         print <<EOT;
5971 <dt><b>author</b></dt>
5972 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5973 <dt><b>committer</b></dt>
5974 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5975 EOT
5976         my $have_pickaxe = gitweb_check_feature('pickaxe');
5977         if ($have_pickaxe) {
5978                 print <<EOT;
5979 <dt><b>pickaxe</b></dt>
5980 <dd>All commits that caused the string to appear or disappear from any file (changes that
5981 added, removed or "modified" the string) will be listed. This search can take a while and
5982 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5983 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5984 EOT
5985         }
5986         print "</dl>\n";
5987         git_footer_html();
5988 }
5989
5990 sub git_shortlog {
5991         my $head = git_get_head_hash($project);
5992         if (!defined $hash) {
5993                 $hash = $head;
5994         }
5995         if (!defined $page) {
5996                 $page = 0;
5997         }
5998         my $refs = git_get_references();
5999
6000         my $commit_hash = $hash;
6001         if (defined $hash_parent) {
6002                 $commit_hash = "$hash_parent..$hash";
6003         }
6004         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6005
6006         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6007         my $next_link = '';
6008         if ($#commitlist >= 100) {
6009                 $next_link =
6010                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6011                                  -accesskey => "n", -title => "Alt-n"}, "next");
6012         }
6013         my $patch_max = gitweb_check_feature('patches');
6014         if ($patch_max) {
6015                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6016                         $paging_nav .= " &sdot; " .
6017                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6018                                         "patches");
6019                 }
6020         }
6021
6022         git_header_html();
6023         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6024         git_print_header_div('summary', $project);
6025
6026         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6027
6028         git_footer_html();
6029 }
6030
6031 ## ......................................................................
6032 ## feeds (RSS, Atom; OPML)
6033
6034 sub git_feed {
6035         my $format = shift || 'atom';
6036         my $have_blame = gitweb_check_feature('blame');
6037
6038         # Atom: http://www.atomenabled.org/developers/syndication/
6039         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6040         if ($format ne 'rss' && $format ne 'atom') {
6041                 die_error(400, "Unknown web feed format");
6042         }
6043
6044         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6045         my $head = $hash || 'HEAD';
6046         my @commitlist = parse_commits($head, 150, 0, $file_name);
6047
6048         my %latest_commit;
6049         my %latest_date;
6050         my $content_type = "application/$format+xml";
6051         if (defined $cgi->http('HTTP_ACCEPT') &&
6052                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6053                 # browser (feed reader) prefers text/xml
6054                 $content_type = 'text/xml';
6055         }
6056         if (defined($commitlist[0])) {
6057                 %latest_commit = %{$commitlist[0]};
6058                 my $latest_epoch = $latest_commit{'committer_epoch'};
6059                 %latest_date   = parse_date($latest_epoch);
6060                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6061                 if (defined $if_modified) {
6062                         my $since;
6063                         if (eval { require HTTP::Date; 1; }) {
6064                                 $since = HTTP::Date::str2time($if_modified);
6065                         } elsif (eval { require Time::ParseDate; 1; }) {
6066                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6067                         }
6068                         if (defined $since && $latest_epoch <= $since) {
6069                                 print $cgi->header(
6070                                         -type => $content_type,
6071                                         -charset => 'utf-8',
6072                                         -last_modified => $latest_date{'rfc2822'},
6073                                         -status => '304 Not Modified');
6074                                 return;
6075                         }
6076                 }
6077                 print $cgi->header(
6078                         -type => $content_type,
6079                         -charset => 'utf-8',
6080                         -last_modified => $latest_date{'rfc2822'});
6081         } else {
6082                 print $cgi->header(
6083                         -type => $content_type,
6084                         -charset => 'utf-8');
6085         }
6086
6087         # Optimization: skip generating the body if client asks only
6088         # for Last-Modified date.
6089         return if ($cgi->request_method() eq 'HEAD');
6090
6091         # header variables
6092         my $title = "$site_name - $project/$action";
6093         my $feed_type = 'log';
6094         if (defined $hash) {
6095                 $title .= " - '$hash'";
6096                 $feed_type = 'branch log';
6097                 if (defined $file_name) {
6098                         $title .= " :: $file_name";
6099                         $feed_type = 'history';
6100                 }
6101         } elsif (defined $file_name) {
6102                 $title .= " - $file_name";
6103                 $feed_type = 'history';
6104         }
6105         $title .= " $feed_type";
6106         my $descr = git_get_project_description($project);
6107         if (defined $descr) {
6108                 $descr = esc_html($descr);
6109         } else {
6110                 $descr = "$project " .
6111                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6112                          " feed";
6113         }
6114         my $owner = git_get_project_owner($project);
6115         $owner = esc_html($owner);
6116
6117         #header
6118         my $alt_url;
6119         if (defined $file_name) {
6120                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6121         } elsif (defined $hash) {
6122                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6123         } else {
6124                 $alt_url = href(-full=>1, action=>"summary");
6125         }
6126         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6127         if ($format eq 'rss') {
6128                 print <<XML;
6129 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6130 <channel>
6131 XML
6132                 print "<title>$title</title>\n" .
6133                       "<link>$alt_url</link>\n" .
6134                       "<description>$descr</description>\n" .
6135                       "<language>en</language>\n" .
6136                       # project owner is responsible for 'editorial' content
6137                       "<managingEditor>$owner</managingEditor>\n";
6138                 if (defined $logo || defined $favicon) {
6139                         # prefer the logo to the favicon, since RSS
6140                         # doesn't allow both
6141                         my $img = esc_url($logo || $favicon);
6142                         print "<image>\n" .
6143                               "<url>$img</url>\n" .
6144                               "<title>$title</title>\n" .
6145                               "<link>$alt_url</link>\n" .
6146                               "</image>\n";
6147                 }
6148                 if (%latest_date) {
6149                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6150                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6151                 }
6152                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6153         } elsif ($format eq 'atom') {
6154                 print <<XML;
6155 <feed xmlns="http://www.w3.org/2005/Atom">
6156 XML
6157                 print "<title>$title</title>\n" .
6158                       "<subtitle>$descr</subtitle>\n" .
6159                       '<link rel="alternate" type="text/html" href="' .
6160                       $alt_url . '" />' . "\n" .
6161                       '<link rel="self" type="' . $content_type . '" href="' .
6162                       $cgi->self_url() . '" />' . "\n" .
6163                       "<id>" . href(-full=>1) . "</id>\n" .
6164                       # use project owner for feed author
6165                       "<author><name>$owner</name></author>\n";
6166                 if (defined $favicon) {
6167                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6168                 }
6169                 if (defined $logo_url) {
6170                         # not twice as wide as tall: 72 x 27 pixels
6171                         print "<logo>" . esc_url($logo) . "</logo>\n";
6172                 }
6173                 if (! %latest_date) {
6174                         # dummy date to keep the feed valid until commits trickle in:
6175                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6176                 } else {
6177                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6178                 }
6179                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6180         }
6181
6182         # contents
6183         for (my $i = 0; $i <= $#commitlist; $i++) {
6184                 my %co = %{$commitlist[$i]};
6185                 my $commit = $co{'id'};
6186                 # we read 150, we always show 30 and the ones more recent than 48 hours
6187                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6188                         last;
6189                 }
6190                 my %cd = parse_date($co{'author_epoch'});
6191
6192                 # get list of changed files
6193                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6194                         $co{'parent'} || "--root",
6195                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6196                         or next;
6197                 my @difftree = map { chomp; $_ } <$fd>;
6198                 close $fd
6199                         or next;
6200
6201                 # print element (entry, item)
6202                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6203                 if ($format eq 'rss') {
6204                         print "<item>\n" .
6205                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6206                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6207                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6208                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6209                               "<link>$co_url</link>\n" .
6210                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6211                               "<content:encoded>" .
6212                               "<![CDATA[\n";
6213                 } elsif ($format eq 'atom') {
6214                         print "<entry>\n" .
6215                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6216                               "<updated>$cd{'iso-8601'}</updated>\n" .
6217                               "<author>\n" .
6218                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6219                         if ($co{'author_email'}) {
6220                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6221                         }
6222                         print "</author>\n" .
6223                               # use committer for contributor
6224                               "<contributor>\n" .
6225                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6226                         if ($co{'committer_email'}) {
6227                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6228                         }
6229                         print "</contributor>\n" .
6230                               "<published>$cd{'iso-8601'}</published>\n" .
6231                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6232                               "<id>$co_url</id>\n" .
6233                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6234                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6235                 }
6236                 my $comment = $co{'comment'};
6237                 print "<pre>\n";
6238                 foreach my $line (@$comment) {
6239                         $line = esc_html($line);
6240                         print "$line\n";
6241                 }
6242                 print "</pre><ul>\n";
6243                 foreach my $difftree_line (@difftree) {
6244                         my %difftree = parse_difftree_raw_line($difftree_line);
6245                         next if !$difftree{'from_id'};
6246
6247                         my $file = $difftree{'file'} || $difftree{'to_file'};
6248
6249                         print "<li>" .
6250                               "[" .
6251                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6252                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6253                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6254                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6255                                       -title => "diff"}, 'D');
6256                         if ($have_blame) {
6257                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6258                                                              file_name=>$file, hash_base=>$commit),
6259                                               -title => "blame"}, 'B');
6260                         }
6261                         # if this is not a feed of a file history
6262                         if (!defined $file_name || $file_name ne $file) {
6263                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6264                                                              file_name=>$file, hash=>$commit),
6265                                               -title => "history"}, 'H');
6266                         }
6267                         $file = esc_path($file);
6268                         print "] ".
6269                               "$file</li>\n";
6270                 }
6271                 if ($format eq 'rss') {
6272                         print "</ul>]]>\n" .
6273                               "</content:encoded>\n" .
6274                               "</item>\n";
6275                 } elsif ($format eq 'atom') {
6276                         print "</ul>\n</div>\n" .
6277                               "</content>\n" .
6278                               "</entry>\n";
6279                 }
6280         }
6281
6282         # end of feed
6283         if ($format eq 'rss') {
6284                 print "</channel>\n</rss>\n";
6285         }       elsif ($format eq 'atom') {
6286                 print "</feed>\n";
6287         }
6288 }
6289
6290 sub git_rss {
6291         git_feed('rss');
6292 }
6293
6294 sub git_atom {
6295         git_feed('atom');
6296 }
6297
6298 sub git_opml {
6299         my @list = git_get_projects_list();
6300
6301         print $cgi->header(
6302                 -type => 'text/xml',
6303                 -charset => 'utf-8',
6304                 -content_disposition => 'inline; filename="opml.xml"');
6305
6306         print <<XML;
6307 <?xml version="1.0" encoding="utf-8"?>
6308 <opml version="1.0">
6309 <head>
6310   <title>$site_name OPML Export</title>
6311 </head>
6312 <body>
6313 <outline text="git RSS feeds">
6314 XML
6315
6316         foreach my $pr (@list) {
6317                 my %proj = %$pr;
6318                 my $head = git_get_head_hash($proj{'path'});
6319                 if (!defined $head) {
6320                         next;
6321                 }
6322                 $git_dir = "$projectroot/$proj{'path'}";
6323                 my %co = parse_commit($head);
6324                 if (!%co) {
6325                         next;
6326                 }
6327
6328                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6329                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6330                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6331                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6332         }
6333         print <<XML;
6334 </outline>
6335 </body>
6336 </opml>
6337 XML
6338 }