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         opendir my $dh, "$git_dir/ctags"
2069                 or return $ctags;
2070         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2071                 open my $ct, '<', $_ or next;
2072                 my $val = <$ct>;
2073                 chomp $val;
2074                 close $ct;
2075                 my $ctag = $_; $ctag =~ s#.*/##;
2076                 $ctags->{$ctag} = $val;
2077         }
2078         closedir $dh;
2079         $ctags;
2080 }
2081
2082 sub git_populate_project_tagcloud {
2083         my $ctags = shift;
2084
2085         # First, merge different-cased tags; tags vote on casing
2086         my %ctags_lc;
2087         foreach (keys %$ctags) {
2088                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2089                 if (not $ctags_lc{lc $_}->{topcount}
2090                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2091                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2092                         $ctags_lc{lc $_}->{topname} = $_;
2093                 }
2094         }
2095
2096         my $cloud;
2097         if (eval { require HTML::TagCloud; 1; }) {
2098                 $cloud = HTML::TagCloud->new;
2099                 foreach (sort keys %ctags_lc) {
2100                         # Pad the title with spaces so that the cloud looks
2101                         # less crammed.
2102                         my $title = $ctags_lc{$_}->{topname};
2103                         $title =~ s/ /&nbsp;/g;
2104                         $title =~ s/^/&nbsp;/g;
2105                         $title =~ s/$/&nbsp;/g;
2106                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2107                 }
2108         } else {
2109                 $cloud = \%ctags_lc;
2110         }
2111         $cloud;
2112 }
2113
2114 sub git_show_project_tagcloud {
2115         my ($cloud, $count) = @_;
2116         print STDERR ref($cloud)."..\n";
2117         if (ref $cloud eq 'HTML::TagCloud') {
2118                 return $cloud->html_and_css($count);
2119         } else {
2120                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2121                 return '<p align="center">' . join (', ', map {
2122                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2123                 } splice(@tags, 0, $count)) . '</p>';
2124         }
2125 }
2126
2127 sub git_get_project_url_list {
2128         my $path = shift;
2129
2130         $git_dir = "$projectroot/$path";
2131         open my $fd, '<', "$git_dir/cloneurl"
2132                 or return wantarray ?
2133                 @{ config_to_multi(git_get_project_config('url')) } :
2134                    config_to_multi(git_get_project_config('url'));
2135         my @git_project_url_list = map { chomp; $_ } <$fd>;
2136         close $fd;
2137
2138         return wantarray ? @git_project_url_list : \@git_project_url_list;
2139 }
2140
2141 sub git_get_projects_list {
2142         my ($filter) = @_;
2143         my @list;
2144
2145         $filter ||= '';
2146         $filter =~ s/\.git$//;
2147
2148         my $check_forks = gitweb_check_feature('forks');
2149
2150         if (-d $projects_list) {
2151                 # search in directory
2152                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2153                 # remove the trailing "/"
2154                 $dir =~ s!/+$!!;
2155                 my $pfxlen = length("$dir");
2156                 my $pfxdepth = ($dir =~ tr!/!!);
2157
2158                 File::Find::find({
2159                         follow_fast => 1, # follow symbolic links
2160                         follow_skip => 2, # ignore duplicates
2161                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2162                         wanted => sub {
2163                                 # skip project-list toplevel, if we get it.
2164                                 return if (m!^[/.]$!);
2165                                 # only directories can be git repositories
2166                                 return unless (-d $_);
2167                                 # don't traverse too deep (Find is super slow on os x)
2168                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2169                                         $File::Find::prune = 1;
2170                                         return;
2171                                 }
2172
2173                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2174                                 # we check related file in $projectroot
2175                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2176                                 if (check_export_ok("$projectroot/$path")) {
2177                                         push @list, { path => $path };
2178                                         $File::Find::prune = 1;
2179                                 }
2180                         },
2181                 }, "$dir");
2182
2183         } elsif (-f $projects_list) {
2184                 # read from file(url-encoded):
2185                 # 'git%2Fgit.git Linus+Torvalds'
2186                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2187                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2188                 my %paths;
2189                 open my $fd, '<', $projects_list or return;
2190         PROJECT:
2191                 while (my $line = <$fd>) {
2192                         chomp $line;
2193                         my ($path, $owner) = split ' ', $line;
2194                         $path = unescape($path);
2195                         $owner = unescape($owner);
2196                         if (!defined $path) {
2197                                 next;
2198                         }
2199                         if ($filter ne '') {
2200                                 # looking for forks;
2201                                 my $pfx = substr($path, 0, length($filter));
2202                                 if ($pfx ne $filter) {
2203                                         next PROJECT;
2204                                 }
2205                                 my $sfx = substr($path, length($filter));
2206                                 if ($sfx !~ /^\/.*\.git$/) {
2207                                         next PROJECT;
2208                                 }
2209                         } elsif ($check_forks) {
2210                         PATH:
2211                                 foreach my $filter (keys %paths) {
2212                                         # looking for forks;
2213                                         my $pfx = substr($path, 0, length($filter));
2214                                         if ($pfx ne $filter) {
2215                                                 next PATH;
2216                                         }
2217                                         my $sfx = substr($path, length($filter));
2218                                         if ($sfx !~ /^\/.*\.git$/) {
2219                                                 next PATH;
2220                                         }
2221                                         # is a fork, don't include it in
2222                                         # the list
2223                                         next PROJECT;
2224                                 }
2225                         }
2226                         if (check_export_ok("$projectroot/$path")) {
2227                                 my $pr = {
2228                                         path => $path,
2229                                         owner => to_utf8($owner),
2230                                 };
2231                                 push @list, $pr;
2232                                 (my $forks_path = $path) =~ s/\.git$//;
2233                                 $paths{$forks_path}++;
2234                         }
2235                 }
2236                 close $fd;
2237         }
2238         return @list;
2239 }
2240
2241 our $gitweb_project_owner = undef;
2242 sub git_get_project_list_from_file {
2243
2244         return if (defined $gitweb_project_owner);
2245
2246         $gitweb_project_owner = {};
2247         # read from file (url-encoded):
2248         # 'git%2Fgit.git Linus+Torvalds'
2249         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2250         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2251         if (-f $projects_list) {
2252                 open(my $fd, '<', $projects_list);
2253                 while (my $line = <$fd>) {
2254                         chomp $line;
2255                         my ($pr, $ow) = split ' ', $line;
2256                         $pr = unescape($pr);
2257                         $ow = unescape($ow);
2258                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2259                 }
2260                 close $fd;
2261         }
2262 }
2263
2264 sub git_get_project_owner {
2265         my $project = shift;
2266         my $owner;
2267
2268         return undef unless $project;
2269         $git_dir = "$projectroot/$project";
2270
2271         if (!defined $gitweb_project_owner) {
2272                 git_get_project_list_from_file();
2273         }
2274
2275         if (exists $gitweb_project_owner->{$project}) {
2276                 $owner = $gitweb_project_owner->{$project};
2277         }
2278         if (!defined $owner){
2279                 $owner = git_get_project_config('owner');
2280         }
2281         if (!defined $owner) {
2282                 $owner = get_file_owner("$git_dir");
2283         }
2284
2285         return $owner;
2286 }
2287
2288 sub git_get_last_activity {
2289         my ($path) = @_;
2290         my $fd;
2291
2292         $git_dir = "$projectroot/$path";
2293         open($fd, "-|", git_cmd(), 'for-each-ref',
2294              '--format=%(committer)',
2295              '--sort=-committerdate',
2296              '--count=1',
2297              'refs/heads') or return;
2298         my $most_recent = <$fd>;
2299         close $fd or return;
2300         if (defined $most_recent &&
2301             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2302                 my $timestamp = $1;
2303                 my $age = time - $timestamp;
2304                 return ($age, age_string($age));
2305         }
2306         return (undef, undef);
2307 }
2308
2309 sub git_get_references {
2310         my $type = shift || "";
2311         my %refs;
2312         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2313         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2314         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2315                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2316                 or return;
2317
2318         while (my $line = <$fd>) {
2319                 chomp $line;
2320                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2321                         if (defined $refs{$1}) {
2322                                 push @{$refs{$1}}, $2;
2323                         } else {
2324                                 $refs{$1} = [ $2 ];
2325                         }
2326                 }
2327         }
2328         close $fd or return;
2329         return \%refs;
2330 }
2331
2332 sub git_get_rev_name_tags {
2333         my $hash = shift || return undef;
2334
2335         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2336                 or return;
2337         my $name_rev = <$fd>;
2338         close $fd;
2339
2340         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2341                 return $1;
2342         } else {
2343                 # catches also '$hash undefined' output
2344                 return undef;
2345         }
2346 }
2347
2348 ## ----------------------------------------------------------------------
2349 ## parse to hash functions
2350
2351 sub parse_date {
2352         my $epoch = shift;
2353         my $tz = shift || "-0000";
2354
2355         my %date;
2356         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2357         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2358         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2359         $date{'hour'} = $hour;
2360         $date{'minute'} = $min;
2361         $date{'mday'} = $mday;
2362         $date{'day'} = $days[$wday];
2363         $date{'month'} = $months[$mon];
2364         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2365                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2366         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2367                              $mday, $months[$mon], $hour ,$min;
2368         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2369                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2370
2371         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2372         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2373         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2374         $date{'hour_local'} = $hour;
2375         $date{'minute_local'} = $min;
2376         $date{'tz_local'} = $tz;
2377         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2378                                   1900+$year, $mon+1, $mday,
2379                                   $hour, $min, $sec, $tz);
2380         return %date;
2381 }
2382
2383 sub parse_tag {
2384         my $tag_id = shift;
2385         my %tag;
2386         my @comment;
2387
2388         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2389         $tag{'id'} = $tag_id;
2390         while (my $line = <$fd>) {
2391                 chomp $line;
2392                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2393                         $tag{'object'} = $1;
2394                 } elsif ($line =~ m/^type (.+)$/) {
2395                         $tag{'type'} = $1;
2396                 } elsif ($line =~ m/^tag (.+)$/) {
2397                         $tag{'name'} = $1;
2398                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2399                         $tag{'author'} = $1;
2400                         $tag{'epoch'} = $2;
2401                         $tag{'tz'} = $3;
2402                 } elsif ($line =~ m/--BEGIN/) {
2403                         push @comment, $line;
2404                         last;
2405                 } elsif ($line eq "") {
2406                         last;
2407                 }
2408         }
2409         push @comment, <$fd>;
2410         $tag{'comment'} = \@comment;
2411         close $fd or return;
2412         if (!defined $tag{'name'}) {
2413                 return
2414         };
2415         return %tag
2416 }
2417
2418 sub parse_commit_text {
2419         my ($commit_text, $withparents) = @_;
2420         my @commit_lines = split '\n', $commit_text;
2421         my %co;
2422
2423         pop @commit_lines; # Remove '\0'
2424
2425         if (! @commit_lines) {
2426                 return;
2427         }
2428
2429         my $header = shift @commit_lines;
2430         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2431                 return;
2432         }
2433         ($co{'id'}, my @parents) = split ' ', $header;
2434         while (my $line = shift @commit_lines) {
2435                 last if $line eq "\n";
2436                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2437                         $co{'tree'} = $1;
2438                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2439                         push @parents, $1;
2440                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2441                         $co{'author'} = $1;
2442                         $co{'author_epoch'} = $2;
2443                         $co{'author_tz'} = $3;
2444                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2445                                 $co{'author_name'}  = $1;
2446                                 $co{'author_email'} = $2;
2447                         } else {
2448                                 $co{'author_name'} = $co{'author'};
2449                         }
2450                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2451                         $co{'committer'} = $1;
2452                         $co{'committer_epoch'} = $2;
2453                         $co{'committer_tz'} = $3;
2454                         $co{'committer_name'} = $co{'committer'};
2455                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2456                                 $co{'committer_name'}  = $1;
2457                                 $co{'committer_email'} = $2;
2458                         } else {
2459                                 $co{'committer_name'} = $co{'committer'};
2460                         }
2461                 }
2462         }
2463         if (!defined $co{'tree'}) {
2464                 return;
2465         };
2466         $co{'parents'} = \@parents;
2467         $co{'parent'} = $parents[0];
2468
2469         foreach my $title (@commit_lines) {
2470                 $title =~ s/^    //;
2471                 if ($title ne "") {
2472                         $co{'title'} = chop_str($title, 80, 5);
2473                         # remove leading stuff of merges to make the interesting part visible
2474                         if (length($title) > 50) {
2475                                 $title =~ s/^Automatic //;
2476                                 $title =~ s/^merge (of|with) /Merge ... /i;
2477                                 if (length($title) > 50) {
2478                                         $title =~ s/(http|rsync):\/\///;
2479                                 }
2480                                 if (length($title) > 50) {
2481                                         $title =~ s/(master|www|rsync)\.//;
2482                                 }
2483                                 if (length($title) > 50) {
2484                                         $title =~ s/kernel.org:?//;
2485                                 }
2486                                 if (length($title) > 50) {
2487                                         $title =~ s/\/pub\/scm//;
2488                                 }
2489                         }
2490                         $co{'title_short'} = chop_str($title, 50, 5);
2491                         last;
2492                 }
2493         }
2494         if (! defined $co{'title'} || $co{'title'} eq "") {
2495                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2496         }
2497         # remove added spaces
2498         foreach my $line (@commit_lines) {
2499                 $line =~ s/^    //;
2500         }
2501         $co{'comment'} = \@commit_lines;
2502
2503         my $age = time - $co{'committer_epoch'};
2504         $co{'age'} = $age;
2505         $co{'age_string'} = age_string($age);
2506         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2507         if ($age > 60*60*24*7*2) {
2508                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2509                 $co{'age_string_age'} = $co{'age_string'};
2510         } else {
2511                 $co{'age_string_date'} = $co{'age_string'};
2512                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2513         }
2514         return %co;
2515 }
2516
2517 sub parse_commit {
2518         my ($commit_id) = @_;
2519         my %co;
2520
2521         local $/ = "\0";
2522
2523         open my $fd, "-|", git_cmd(), "rev-list",
2524                 "--parents",
2525                 "--header",
2526                 "--max-count=1",
2527                 $commit_id,
2528                 "--",
2529                 or die_error(500, "Open git-rev-list failed");
2530         %co = parse_commit_text(<$fd>, 1);
2531         close $fd;
2532
2533         return %co;
2534 }
2535
2536 sub parse_commits {
2537         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2538         my @cos;
2539
2540         $maxcount ||= 1;
2541         $skip ||= 0;
2542
2543         local $/ = "\0";
2544
2545         open my $fd, "-|", git_cmd(), "rev-list",
2546                 "--header",
2547                 @args,
2548                 ("--max-count=" . $maxcount),
2549                 ("--skip=" . $skip),
2550                 @extra_options,
2551                 $commit_id,
2552                 "--",
2553                 ($filename ? ($filename) : ())
2554                 or die_error(500, "Open git-rev-list failed");
2555         while (my $line = <$fd>) {
2556                 my %co = parse_commit_text($line);
2557                 push @cos, \%co;
2558         }
2559         close $fd;
2560
2561         return wantarray ? @cos : \@cos;
2562 }
2563
2564 # parse line of git-diff-tree "raw" output
2565 sub parse_difftree_raw_line {
2566         my $line = shift;
2567         my %res;
2568
2569         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2570         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2571         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2572                 $res{'from_mode'} = $1;
2573                 $res{'to_mode'} = $2;
2574                 $res{'from_id'} = $3;
2575                 $res{'to_id'} = $4;
2576                 $res{'status'} = $5;
2577                 $res{'similarity'} = $6;
2578                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2579                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2580                 } else {
2581                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2582                 }
2583         }
2584         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2585         # combined diff (for merge commit)
2586         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2587                 $res{'nparents'}  = length($1);
2588                 $res{'from_mode'} = [ split(' ', $2) ];
2589                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2590                 $res{'from_id'} = [ split(' ', $3) ];
2591                 $res{'to_id'} = pop @{$res{'from_id'}};
2592                 $res{'status'} = [ split('', $4) ];
2593                 $res{'to_file'} = unquote($5);
2594         }
2595         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2596         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2597                 $res{'commit'} = $1;
2598         }
2599
2600         return wantarray ? %res : \%res;
2601 }
2602
2603 # wrapper: return parsed line of git-diff-tree "raw" output
2604 # (the argument might be raw line, or parsed info)
2605 sub parsed_difftree_line {
2606         my $line_or_ref = shift;
2607
2608         if (ref($line_or_ref) eq "HASH") {
2609                 # pre-parsed (or generated by hand)
2610                 return $line_or_ref;
2611         } else {
2612                 return parse_difftree_raw_line($line_or_ref);
2613         }
2614 }
2615
2616 # parse line of git-ls-tree output
2617 sub parse_ls_tree_line {
2618         my $line = shift;
2619         my %opts = @_;
2620         my %res;
2621
2622         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2623         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2624
2625         $res{'mode'} = $1;
2626         $res{'type'} = $2;
2627         $res{'hash'} = $3;
2628         if ($opts{'-z'}) {
2629                 $res{'name'} = $4;
2630         } else {
2631                 $res{'name'} = unquote($4);
2632         }
2633
2634         return wantarray ? %res : \%res;
2635 }
2636
2637 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2638 sub parse_from_to_diffinfo {
2639         my ($diffinfo, $from, $to, @parents) = @_;
2640
2641         if ($diffinfo->{'nparents'}) {
2642                 # combined diff
2643                 $from->{'file'} = [];
2644                 $from->{'href'} = [];
2645                 fill_from_file_info($diffinfo, @parents)
2646                         unless exists $diffinfo->{'from_file'};
2647                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2648                         $from->{'file'}[$i] =
2649                                 defined $diffinfo->{'from_file'}[$i] ?
2650                                         $diffinfo->{'from_file'}[$i] :
2651                                         $diffinfo->{'to_file'};
2652                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2653                                 $from->{'href'}[$i] = href(action=>"blob",
2654                                                            hash_base=>$parents[$i],
2655                                                            hash=>$diffinfo->{'from_id'}[$i],
2656                                                            file_name=>$from->{'file'}[$i]);
2657                         } else {
2658                                 $from->{'href'}[$i] = undef;
2659                         }
2660                 }
2661         } else {
2662                 # ordinary (not combined) diff
2663                 $from->{'file'} = $diffinfo->{'from_file'};
2664                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2665                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2666                                                hash=>$diffinfo->{'from_id'},
2667                                                file_name=>$from->{'file'});
2668                 } else {
2669                         delete $from->{'href'};
2670                 }
2671         }
2672
2673         $to->{'file'} = $diffinfo->{'to_file'};
2674         if (!is_deleted($diffinfo)) { # file exists in result
2675                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2676                                      hash=>$diffinfo->{'to_id'},
2677                                      file_name=>$to->{'file'});
2678         } else {
2679                 delete $to->{'href'};
2680         }
2681 }
2682
2683 ## ......................................................................
2684 ## parse to array of hashes functions
2685
2686 sub git_get_heads_list {
2687         my $limit = shift;
2688         my @headslist;
2689
2690         open my $fd, '-|', git_cmd(), 'for-each-ref',
2691                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2692                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2693                 'refs/heads'
2694                 or return;
2695         while (my $line = <$fd>) {
2696                 my %ref_item;
2697
2698                 chomp $line;
2699                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2700                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2701                 my ($committer, $epoch, $tz) =
2702                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2703                 $ref_item{'fullname'}  = $name;
2704                 $name =~ s!^refs/heads/!!;
2705
2706                 $ref_item{'name'}  = $name;
2707                 $ref_item{'id'}    = $hash;
2708                 $ref_item{'title'} = $title || '(no commit message)';
2709                 $ref_item{'epoch'} = $epoch;
2710                 if ($epoch) {
2711                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2712                 } else {
2713                         $ref_item{'age'} = "unknown";
2714                 }
2715
2716                 push @headslist, \%ref_item;
2717         }
2718         close $fd;
2719
2720         return wantarray ? @headslist : \@headslist;
2721 }
2722
2723 sub git_get_tags_list {
2724         my $limit = shift;
2725         my @tagslist;
2726
2727         open my $fd, '-|', git_cmd(), 'for-each-ref',
2728                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2729                 '--format=%(objectname) %(objecttype) %(refname) '.
2730                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2731                 'refs/tags'
2732                 or return;
2733         while (my $line = <$fd>) {
2734                 my %ref_item;
2735
2736                 chomp $line;
2737                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2738                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2739                 my ($creator, $epoch, $tz) =
2740                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2741                 $ref_item{'fullname'} = $name;
2742                 $name =~ s!^refs/tags/!!;
2743
2744                 $ref_item{'type'} = $type;
2745                 $ref_item{'id'} = $id;
2746                 $ref_item{'name'} = $name;
2747                 if ($type eq "tag") {
2748                         $ref_item{'subject'} = $title;
2749                         $ref_item{'reftype'} = $reftype;
2750                         $ref_item{'refid'}   = $refid;
2751                 } else {
2752                         $ref_item{'reftype'} = $type;
2753                         $ref_item{'refid'}   = $id;
2754                 }
2755
2756                 if ($type eq "tag" || $type eq "commit") {
2757                         $ref_item{'epoch'} = $epoch;
2758                         if ($epoch) {
2759                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2760                         } else {
2761                                 $ref_item{'age'} = "unknown";
2762                         }
2763                 }
2764
2765                 push @tagslist, \%ref_item;
2766         }
2767         close $fd;
2768
2769         return wantarray ? @tagslist : \@tagslist;
2770 }
2771
2772 ## ----------------------------------------------------------------------
2773 ## filesystem-related functions
2774
2775 sub get_file_owner {
2776         my $path = shift;
2777
2778         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2779         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2780         if (!defined $gcos) {
2781                 return undef;
2782         }
2783         my $owner = $gcos;
2784         $owner =~ s/[,;].*$//;
2785         return to_utf8($owner);
2786 }
2787
2788 # assume that file exists
2789 sub insert_file {
2790         my $filename = shift;
2791
2792         open my $fd, '<', $filename;
2793         print map { to_utf8($_) } <$fd>;
2794         close $fd;
2795 }
2796
2797 ## ......................................................................
2798 ## mimetype related functions
2799
2800 sub mimetype_guess_file {
2801         my $filename = shift;
2802         my $mimemap = shift;
2803         -r $mimemap or return undef;
2804
2805         my %mimemap;
2806         open(my $mh, '<', $mimemap) or return undef;
2807         while (<$mh>) {
2808                 next if m/^#/; # skip comments
2809                 my ($mimetype, $exts) = split(/\t+/);
2810                 if (defined $exts) {
2811                         my @exts = split(/\s+/, $exts);
2812                         foreach my $ext (@exts) {
2813                                 $mimemap{$ext} = $mimetype;
2814                         }
2815                 }
2816         }
2817         close($mh);
2818
2819         $filename =~ /\.([^.]*)$/;
2820         return $mimemap{$1};
2821 }
2822
2823 sub mimetype_guess {
2824         my $filename = shift;
2825         my $mime;
2826         $filename =~ /\./ or return undef;
2827
2828         if ($mimetypes_file) {
2829                 my $file = $mimetypes_file;
2830                 if ($file !~ m!^/!) { # if it is relative path
2831                         # it is relative to project
2832                         $file = "$projectroot/$project/$file";
2833                 }
2834                 $mime = mimetype_guess_file($filename, $file);
2835         }
2836         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2837         return $mime;
2838 }
2839
2840 sub blob_mimetype {
2841         my $fd = shift;
2842         my $filename = shift;
2843
2844         if ($filename) {
2845                 my $mime = mimetype_guess($filename);
2846                 $mime and return $mime;
2847         }
2848
2849         # just in case
2850         return $default_blob_plain_mimetype unless $fd;
2851
2852         if (-T $fd) {
2853                 return 'text/plain';
2854         } elsif (! $filename) {
2855                 return 'application/octet-stream';
2856         } elsif ($filename =~ m/\.png$/i) {
2857                 return 'image/png';
2858         } elsif ($filename =~ m/\.gif$/i) {
2859                 return 'image/gif';
2860         } elsif ($filename =~ m/\.jpe?g$/i) {
2861                 return 'image/jpeg';
2862         } else {
2863                 return 'application/octet-stream';
2864         }
2865 }
2866
2867 sub blob_contenttype {
2868         my ($fd, $file_name, $type) = @_;
2869
2870         $type ||= blob_mimetype($fd, $file_name);
2871         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2872                 $type .= "; charset=$default_text_plain_charset";
2873         }
2874
2875         return $type;
2876 }
2877
2878 ## ======================================================================
2879 ## functions printing HTML: header, footer, error page
2880
2881 sub git_header_html {
2882         my $status = shift || "200 OK";
2883         my $expires = shift;
2884
2885         my $title = "$site_name";
2886         if (defined $project) {
2887                 $title .= " - " . to_utf8($project);
2888                 if (defined $action) {
2889                         $title .= "/$action";
2890                         if (defined $file_name) {
2891                                 $title .= " - " . esc_path($file_name);
2892                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2893                                         $title .= "/";
2894                                 }
2895                         }
2896                 }
2897         }
2898         my $content_type;
2899         # require explicit support from the UA if we are to send the page as
2900         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2901         # we have to do this because MSIE sometimes globs '*/*', pretending to
2902         # support xhtml+xml but choking when it gets what it asked for.
2903         if (defined $cgi->http('HTTP_ACCEPT') &&
2904             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2905             $cgi->Accept('application/xhtml+xml') != 0) {
2906                 $content_type = 'application/xhtml+xml';
2907         } else {
2908                 $content_type = 'text/html';
2909         }
2910         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2911                            -status=> $status, -expires => $expires);
2912         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2913         print <<EOF;
2914 <?xml version="1.0" encoding="utf-8"?>
2915 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2916 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2917 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2918 <!-- git core binaries version $git_version -->
2919 <head>
2920 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2921 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2922 <meta name="robots" content="index, nofollow"/>
2923 <title>$title</title>
2924 EOF
2925         # the stylesheet, favicon etc urls won't work correctly with path_info
2926         # unless we set the appropriate base URL
2927         if ($ENV{'PATH_INFO'}) {
2928                 print "<base href=\"".esc_url($base_url)."\" />\n";
2929         }
2930         # print out each stylesheet that exist, providing backwards capability
2931         # for those people who defined $stylesheet in a config file
2932         if (defined $stylesheet) {
2933                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2934         } else {
2935                 foreach my $stylesheet (@stylesheets) {
2936                         next unless $stylesheet;
2937                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2938                 }
2939         }
2940         if (defined $project) {
2941                 my %href_params = get_feed_info();
2942                 if (!exists $href_params{'-title'}) {
2943                         $href_params{'-title'} = 'log';
2944                 }
2945
2946                 foreach my $format qw(RSS Atom) {
2947                         my $type = lc($format);
2948                         my %link_attr = (
2949                                 '-rel' => 'alternate',
2950                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2951                                 '-type' => "application/$type+xml"
2952                         );
2953
2954                         $href_params{'action'} = $type;
2955                         $link_attr{'-href'} = href(%href_params);
2956                         print "<link ".
2957                               "rel=\"$link_attr{'-rel'}\" ".
2958                               "title=\"$link_attr{'-title'}\" ".
2959                               "href=\"$link_attr{'-href'}\" ".
2960                               "type=\"$link_attr{'-type'}\" ".
2961                               "/>\n";
2962
2963                         $href_params{'extra_options'} = '--no-merges';
2964                         $link_attr{'-href'} = href(%href_params);
2965                         $link_attr{'-title'} .= ' (no merges)';
2966                         print "<link ".
2967                               "rel=\"$link_attr{'-rel'}\" ".
2968                               "title=\"$link_attr{'-title'}\" ".
2969                               "href=\"$link_attr{'-href'}\" ".
2970                               "type=\"$link_attr{'-type'}\" ".
2971                               "/>\n";
2972                 }
2973
2974         } else {
2975                 printf('<link rel="alternate" title="%s projects list" '.
2976                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2977                        $site_name, href(project=>undef, action=>"project_index"));
2978                 printf('<link rel="alternate" title="%s projects feeds" '.
2979                        'href="%s" type="text/x-opml" />'."\n",
2980                        $site_name, href(project=>undef, action=>"opml"));
2981         }
2982         if (defined $favicon) {
2983                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2984         }
2985
2986         print "</head>\n" .
2987               "<body>\n";
2988
2989         if (-f $site_header) {
2990                 insert_file($site_header);
2991         }
2992
2993         print "<div class=\"page_header\">\n" .
2994               $cgi->a({-href => esc_url($logo_url),
2995                        -title => $logo_label},
2996                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2997         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2998         if (defined $project) {
2999                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3000                 if (defined $action) {
3001                         print " / $action";
3002                 }
3003                 print "\n";
3004         }
3005         print "</div>\n";
3006
3007         my $have_search = gitweb_check_feature('search');
3008         if (defined $project && $have_search) {
3009                 if (!defined $searchtext) {
3010                         $searchtext = "";
3011                 }
3012                 my $search_hash;
3013                 if (defined $hash_base) {
3014                         $search_hash = $hash_base;
3015                 } elsif (defined $hash) {
3016                         $search_hash = $hash;
3017                 } else {
3018                         $search_hash = "HEAD";
3019                 }
3020                 my $action = $my_uri;
3021                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3022                 if ($use_pathinfo) {
3023                         $action .= "/".esc_url($project);
3024                 }
3025                 print $cgi->startform(-method => "get", -action => $action) .
3026                       "<div class=\"search\">\n" .
3027                       (!$use_pathinfo &&
3028                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3029                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3030                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3031                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3032                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3033                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3034                       " search:\n",
3035                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3036                       "<span title=\"Extended regular expression\">" .
3037                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3038                                      -checked => $search_use_regexp) .
3039                       "</span>" .
3040                       "</div>" .
3041                       $cgi->end_form() . "\n";
3042         }
3043 }
3044
3045 sub git_footer_html {
3046         my $feed_class = 'rss_logo';
3047
3048         print "<div class=\"page_footer\">\n";
3049         if (defined $project) {
3050                 my $descr = git_get_project_description($project);
3051                 if (defined $descr) {
3052                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3053                 }
3054
3055                 my %href_params = get_feed_info();
3056                 if (!%href_params) {
3057                         $feed_class .= ' generic';
3058                 }
3059                 $href_params{'-title'} ||= 'log';
3060
3061                 foreach my $format qw(RSS Atom) {
3062                         $href_params{'action'} = lc($format);
3063                         print $cgi->a({-href => href(%href_params),
3064                                       -title => "$href_params{'-title'} $format feed",
3065                                       -class => $feed_class}, $format)."\n";
3066                 }
3067
3068         } else {
3069                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3070                               -class => $feed_class}, "OPML") . " ";
3071                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3072                               -class => $feed_class}, "TXT") . "\n";
3073         }
3074         print "</div>\n"; # class="page_footer"
3075
3076         if (-f $site_footer) {
3077                 insert_file($site_footer);
3078         }
3079
3080         print "</body>\n" .
3081               "</html>";
3082 }
3083
3084 # die_error(<http_status_code>, <error_message>)
3085 # Example: die_error(404, 'Hash not found')
3086 # By convention, use the following status codes (as defined in RFC 2616):
3087 # 400: Invalid or missing CGI parameters, or
3088 #      requested object exists but has wrong type.
3089 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3090 #      this server or project.
3091 # 404: Requested object/revision/project doesn't exist.
3092 # 500: The server isn't configured properly, or
3093 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3094 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3095 sub die_error {
3096         my $status = shift || 500;
3097         my $error = shift || "Internal server error";
3098
3099         my %http_responses = (400 => '400 Bad Request',
3100                               403 => '403 Forbidden',
3101                               404 => '404 Not Found',
3102                               500 => '500 Internal Server Error');
3103         git_header_html($http_responses{$status});
3104         print <<EOF;
3105 <div class="page_body">
3106 <br /><br />
3107 $status - $error
3108 <br />
3109 </div>
3110 EOF
3111         git_footer_html();
3112         exit;
3113 }
3114
3115 ## ----------------------------------------------------------------------
3116 ## functions printing or outputting HTML: navigation
3117
3118 sub git_print_page_nav {
3119         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3120         $extra = '' if !defined $extra; # pager or formats
3121
3122         my @navs = qw(summary shortlog log commit commitdiff tree);
3123         if ($suppress) {
3124                 @navs = grep { $_ ne $suppress } @navs;
3125         }
3126
3127         my %arg = map { $_ => {action=>$_} } @navs;
3128         if (defined $head) {
3129                 for (qw(commit commitdiff)) {
3130                         $arg{$_}{'hash'} = $head;
3131                 }
3132                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3133                         for (qw(shortlog log)) {
3134                                 $arg{$_}{'hash'} = $head;
3135                         }
3136                 }
3137         }
3138
3139         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3140         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3141
3142         my @actions = gitweb_get_feature('actions');
3143         my %repl = (
3144                 '%' => '%',
3145                 'n' => $project,         # project name
3146                 'f' => $git_dir,         # project path within filesystem
3147                 'h' => $treehead || '',  # current hash ('h' parameter)
3148                 'b' => $treebase || '',  # hash base ('hb' parameter)
3149         );
3150         while (@actions) {
3151                 my ($label, $link, $pos) = splice(@actions,0,3);
3152                 # insert
3153                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3154                 # munch munch
3155                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3156                 $arg{$label}{'_href'} = $link;
3157         }
3158
3159         print "<div class=\"page_nav\">\n" .
3160                 (join " | ",
3161                  map { $_ eq $current ?
3162                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3163                  } @navs);
3164         print "<br/>\n$extra<br/>\n" .
3165               "</div>\n";
3166 }
3167
3168 sub format_paging_nav {
3169         my ($action, $hash, $head, $page, $has_next_link) = @_;
3170         my $paging_nav;
3171
3172
3173         if ($hash ne $head || $page) {
3174                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3175         } else {
3176                 $paging_nav .= "HEAD";
3177         }
3178
3179         if ($page > 0) {
3180                 $paging_nav .= " &sdot; " .
3181                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3182                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3183         } else {
3184                 $paging_nav .= " &sdot; prev";
3185         }
3186
3187         if ($has_next_link) {
3188                 $paging_nav .= " &sdot; " .
3189                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3190                                  -accesskey => "n", -title => "Alt-n"}, "next");
3191         } else {
3192                 $paging_nav .= " &sdot; next";
3193         }
3194
3195         return $paging_nav;
3196 }
3197
3198 ## ......................................................................
3199 ## functions printing or outputting HTML: div
3200
3201 sub git_print_header_div {
3202         my ($action, $title, $hash, $hash_base) = @_;
3203         my %args = ();
3204
3205         $args{'action'} = $action;
3206         $args{'hash'} = $hash if $hash;
3207         $args{'hash_base'} = $hash_base if $hash_base;
3208
3209         print "<div class=\"header\">\n" .
3210               $cgi->a({-href => href(%args), -class => "title"},
3211               $title ? $title : $action) .
3212               "\n</div>\n";
3213 }
3214
3215 sub git_print_authorship {
3216         my $co = shift;
3217
3218         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3219         print "<div class=\"author_date\">" .
3220               esc_html($co->{'author_name'}) .
3221               " [$ad{'rfc2822'}";
3222         if ($ad{'hour_local'} < 6) {
3223                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3224                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3225         } else {
3226                 printf(" (%02d:%02d %s)",
3227                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3228         }
3229         print "]</div>\n";
3230 }
3231
3232 sub git_print_page_path {
3233         my $name = shift;
3234         my $type = shift;
3235         my $hb = shift;
3236
3237
3238         print "<div class=\"page_path\">";
3239         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3240                       -title => 'tree root'}, to_utf8("[$project]"));
3241         print " / ";
3242         if (defined $name) {
3243                 my @dirname = split '/', $name;
3244                 my $basename = pop @dirname;
3245                 my $fullname = '';
3246
3247                 foreach my $dir (@dirname) {
3248                         $fullname .= ($fullname ? '/' : '') . $dir;
3249                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3250                                                      hash_base=>$hb),
3251                                       -title => $fullname}, esc_path($dir));
3252                         print " / ";
3253                 }
3254                 if (defined $type && $type eq 'blob') {
3255                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3256                                                      hash_base=>$hb),
3257                                       -title => $name}, esc_path($basename));
3258                 } elsif (defined $type && $type eq 'tree') {
3259                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3260                                                      hash_base=>$hb),
3261                                       -title => $name}, esc_path($basename));
3262                         print " / ";
3263                 } else {
3264                         print esc_path($basename);
3265                 }
3266         }
3267         print "<br/></div>\n";
3268 }
3269
3270 sub git_print_log {
3271         my $log = shift;
3272         my %opts = @_;
3273
3274         if ($opts{'-remove_title'}) {
3275                 # remove title, i.e. first line of log
3276                 shift @$log;
3277         }
3278         # remove leading empty lines
3279         while (defined $log->[0] && $log->[0] eq "") {
3280                 shift @$log;
3281         }
3282
3283         # print log
3284         my $signoff = 0;
3285         my $empty = 0;
3286         foreach my $line (@$log) {
3287                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3288                         $signoff = 1;
3289                         $empty = 0;
3290                         if (! $opts{'-remove_signoff'}) {
3291                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3292                                 next;
3293                         } else {
3294                                 # remove signoff lines
3295                                 next;
3296                         }
3297                 } else {
3298                         $signoff = 0;
3299                 }
3300
3301                 # print only one empty line
3302                 # do not print empty line after signoff
3303                 if ($line eq "") {
3304                         next if ($empty || $signoff);
3305                         $empty = 1;
3306                 } else {
3307                         $empty = 0;
3308                 }
3309
3310                 print format_log_line_html($line) . "<br/>\n";
3311         }
3312
3313         if ($opts{'-final_empty_line'}) {
3314                 # end with single empty line
3315                 print "<br/>\n" unless $empty;
3316         }
3317 }
3318
3319 # return link target (what link points to)
3320 sub git_get_link_target {
3321         my $hash = shift;
3322         my $link_target;
3323
3324         # read link
3325         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3326                 or return;
3327         {
3328                 local $/;
3329                 $link_target = <$fd>;
3330         }
3331         close $fd
3332                 or return;
3333
3334         return $link_target;
3335 }
3336
3337 # given link target, and the directory (basedir) the link is in,
3338 # return target of link relative to top directory (top tree);
3339 # return undef if it is not possible (including absolute links).
3340 sub normalize_link_target {
3341         my ($link_target, $basedir, $hash_base) = @_;
3342
3343         # we can normalize symlink target only if $hash_base is provided
3344         return unless $hash_base;
3345
3346         # absolute symlinks (beginning with '/') cannot be normalized
3347         return if (substr($link_target, 0, 1) eq '/');
3348
3349         # normalize link target to path from top (root) tree (dir)
3350         my $path;
3351         if ($basedir) {
3352                 $path = $basedir . '/' . $link_target;
3353         } else {
3354                 # we are in top (root) tree (dir)
3355                 $path = $link_target;
3356         }
3357
3358         # remove //, /./, and /../
3359         my @path_parts;
3360         foreach my $part (split('/', $path)) {
3361                 # discard '.' and ''
3362                 next if (!$part || $part eq '.');
3363                 # handle '..'
3364                 if ($part eq '..') {
3365                         if (@path_parts) {
3366                                 pop @path_parts;
3367                         } else {
3368                                 # link leads outside repository (outside top dir)
3369                                 return;
3370                         }
3371                 } else {
3372                         push @path_parts, $part;
3373                 }
3374         }
3375         $path = join('/', @path_parts);
3376
3377         return $path;
3378 }
3379
3380 # print tree entry (row of git_tree), but without encompassing <tr> element
3381 sub git_print_tree_entry {
3382         my ($t, $basedir, $hash_base, $have_blame) = @_;
3383
3384         my %base_key = ();
3385         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3386
3387         # The format of a table row is: mode list link.  Where mode is
3388         # the mode of the entry, list is the name of the entry, an href,
3389         # and link is the action links of the entry.
3390
3391         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3392         if ($t->{'type'} eq "blob") {
3393                 print "<td class=\"list\">" .
3394                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3395                                                file_name=>"$basedir$t->{'name'}", %base_key),
3396                                 -class => "list"}, esc_path($t->{'name'}));
3397                 if (S_ISLNK(oct $t->{'mode'})) {
3398                         my $link_target = git_get_link_target($t->{'hash'});
3399                         if ($link_target) {
3400                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3401                                 if (defined $norm_target) {
3402                                         print " -> " .
3403                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3404                                                                      file_name=>$norm_target),
3405                                                        -title => $norm_target}, esc_path($link_target));
3406                                 } else {
3407                                         print " -> " . esc_path($link_target);
3408                                 }
3409                         }
3410                 }
3411                 print "</td>\n";
3412                 print "<td class=\"link\">";
3413                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3414                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3415                               "blob");
3416                 if ($have_blame) {
3417                         print " | " .
3418                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3419                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3420                                       "blame");
3421                 }
3422                 if (defined $hash_base) {
3423                         print " | " .
3424                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3425                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3426                                       "history");
3427                 }
3428                 print " | " .
3429                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3430                                                file_name=>"$basedir$t->{'name'}")},
3431                                 "raw");
3432                 print "</td>\n";
3433
3434         } elsif ($t->{'type'} eq "tree") {
3435                 print "<td class=\"list\">";
3436                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3437                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3438                               esc_path($t->{'name'}));
3439                 print "</td>\n";
3440                 print "<td class=\"link\">";
3441                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3442                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3443                               "tree");
3444                 if (defined $hash_base) {
3445                         print " | " .
3446                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3447                                                      file_name=>"$basedir$t->{'name'}")},
3448                                       "history");
3449                 }
3450                 print "</td>\n";
3451         } else {
3452                 # unknown object: we can only present history for it
3453                 # (this includes 'commit' object, i.e. submodule support)
3454                 print "<td class=\"list\">" .
3455                       esc_path($t->{'name'}) .
3456                       "</td>\n";
3457                 print "<td class=\"link\">";
3458                 if (defined $hash_base) {
3459                         print $cgi->a({-href => href(action=>"history",
3460                                                      hash_base=>$hash_base,
3461                                                      file_name=>"$basedir$t->{'name'}")},
3462                                       "history");
3463                 }
3464                 print "</td>\n";
3465         }
3466 }
3467
3468 ## ......................................................................
3469 ## functions printing large fragments of HTML
3470
3471 # get pre-image filenames for merge (combined) diff
3472 sub fill_from_file_info {
3473         my ($diff, @parents) = @_;
3474
3475         $diff->{'from_file'} = [ ];
3476         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3477         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3478                 if ($diff->{'status'}[$i] eq 'R' ||
3479                     $diff->{'status'}[$i] eq 'C') {
3480                         $diff->{'from_file'}[$i] =
3481                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3482                 }
3483         }
3484
3485         return $diff;
3486 }
3487
3488 # is current raw difftree line of file deletion
3489 sub is_deleted {
3490         my $diffinfo = shift;
3491
3492         return $diffinfo->{'to_id'} eq ('0' x 40);
3493 }
3494
3495 # does patch correspond to [previous] difftree raw line
3496 # $diffinfo  - hashref of parsed raw diff format
3497 # $patchinfo - hashref of parsed patch diff format
3498 #              (the same keys as in $diffinfo)
3499 sub is_patch_split {
3500         my ($diffinfo, $patchinfo) = @_;
3501
3502         return defined $diffinfo && defined $patchinfo
3503                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3504 }
3505
3506
3507 sub git_difftree_body {
3508         my ($difftree, $hash, @parents) = @_;
3509         my ($parent) = $parents[0];
3510         my $have_blame = gitweb_check_feature('blame');
3511         print "<div class=\"list_head\">\n";
3512         if ($#{$difftree} > 10) {
3513                 print(($#{$difftree} + 1) . " files changed:\n");
3514         }
3515         print "</div>\n";
3516
3517         print "<table class=\"" .
3518               (@parents > 1 ? "combined " : "") .
3519               "diff_tree\">\n";
3520
3521         # header only for combined diff in 'commitdiff' view
3522         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3523         if ($has_header) {
3524                 # table header
3525                 print "<thead><tr>\n" .
3526                        "<th></th><th></th>\n"; # filename, patchN link
3527                 for (my $i = 0; $i < @parents; $i++) {
3528                         my $par = $parents[$i];
3529                         print "<th>" .
3530                               $cgi->a({-href => href(action=>"commitdiff",
3531                                                      hash=>$hash, hash_parent=>$par),
3532                                        -title => 'commitdiff to parent number ' .
3533                                                   ($i+1) . ': ' . substr($par,0,7)},
3534                                       $i+1) .
3535                               "&nbsp;</th>\n";
3536                 }
3537                 print "</tr></thead>\n<tbody>\n";
3538         }
3539
3540         my $alternate = 1;
3541         my $patchno = 0;
3542         foreach my $line (@{$difftree}) {
3543                 my $diff = parsed_difftree_line($line);
3544
3545                 if ($alternate) {
3546                         print "<tr class=\"dark\">\n";
3547                 } else {
3548                         print "<tr class=\"light\">\n";
3549                 }
3550                 $alternate ^= 1;
3551
3552                 if (exists $diff->{'nparents'}) { # combined diff
3553
3554                         fill_from_file_info($diff, @parents)
3555                                 unless exists $diff->{'from_file'};
3556
3557                         if (!is_deleted($diff)) {
3558                                 # file exists in the result (child) commit
3559                                 print "<td>" .
3560                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3561                                                              file_name=>$diff->{'to_file'},
3562                                                              hash_base=>$hash),
3563                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3564                                       "</td>\n";
3565                         } else {
3566                                 print "<td>" .
3567                                       esc_path($diff->{'to_file'}) .
3568                                       "</td>\n";
3569                         }
3570
3571                         if ($action eq 'commitdiff') {
3572                                 # link to patch
3573                                 $patchno++;
3574                                 print "<td class=\"link\">" .
3575                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3576                                       " | " .
3577                                       "</td>\n";
3578                         }
3579
3580                         my $has_history = 0;
3581                         my $not_deleted = 0;
3582                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3583                                 my $hash_parent = $parents[$i];
3584                                 my $from_hash = $diff->{'from_id'}[$i];
3585                                 my $from_path = $diff->{'from_file'}[$i];
3586                                 my $status = $diff->{'status'}[$i];
3587
3588                                 $has_history ||= ($status ne 'A');
3589                                 $not_deleted ||= ($status ne 'D');
3590
3591                                 if ($status eq 'A') {
3592                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3593                                 } elsif ($status eq 'D') {
3594                                         print "<td class=\"link\">" .
3595                                               $cgi->a({-href => href(action=>"blob",
3596                                                                      hash_base=>$hash,
3597                                                                      hash=>$from_hash,
3598                                                                      file_name=>$from_path)},
3599                                                       "blob" . ($i+1)) .
3600                                               " | </td>\n";
3601                                 } else {
3602                                         if ($diff->{'to_id'} eq $from_hash) {
3603                                                 print "<td class=\"link nochange\">";
3604                                         } else {
3605                                                 print "<td class=\"link\">";
3606                                         }
3607                                         print $cgi->a({-href => href(action=>"blobdiff",
3608                                                                      hash=>$diff->{'to_id'},
3609                                                                      hash_parent=>$from_hash,
3610                                                                      hash_base=>$hash,
3611                                                                      hash_parent_base=>$hash_parent,
3612                                                                      file_name=>$diff->{'to_file'},
3613                                                                      file_parent=>$from_path)},
3614                                                       "diff" . ($i+1)) .
3615                                               " | </td>\n";
3616                                 }
3617                         }
3618
3619                         print "<td class=\"link\">";
3620                         if ($not_deleted) {
3621                                 print $cgi->a({-href => href(action=>"blob",
3622                                                              hash=>$diff->{'to_id'},
3623                                                              file_name=>$diff->{'to_file'},
3624                                                              hash_base=>$hash)},
3625                                               "blob");
3626                                 print " | " if ($has_history);
3627                         }
3628                         if ($has_history) {
3629                                 print $cgi->a({-href => href(action=>"history",
3630                                                              file_name=>$diff->{'to_file'},
3631                                                              hash_base=>$hash)},
3632                                               "history");
3633                         }
3634                         print "</td>\n";
3635
3636                         print "</tr>\n";
3637                         next; # instead of 'else' clause, to avoid extra indent
3638                 }
3639                 # else ordinary diff
3640
3641                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3642                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3643                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3644                         $to_mode_oct = oct $diff->{'to_mode'};
3645                         if (S_ISREG($to_mode_oct)) { # only for regular file
3646                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3647                         }
3648                         $to_file_type = file_type($diff->{'to_mode'});
3649                 }
3650                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3651                         $from_mode_oct = oct $diff->{'from_mode'};
3652                         if (S_ISREG($to_mode_oct)) { # only for regular file
3653                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3654                         }
3655                         $from_file_type = file_type($diff->{'from_mode'});
3656                 }
3657
3658                 if ($diff->{'status'} eq "A") { # created
3659                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3660                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3661                         $mode_chng   .= "]</span>";
3662                         print "<td>";
3663                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3664                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3665                                       -class => "list"}, esc_path($diff->{'file'}));
3666                         print "</td>\n";
3667                         print "<td>$mode_chng</td>\n";
3668                         print "<td class=\"link\">";
3669                         if ($action eq 'commitdiff') {
3670                                 # link to patch
3671                                 $patchno++;
3672                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3673                                 print " | ";
3674                         }
3675                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3676                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3677                                       "blob");
3678                         print "</td>\n";
3679
3680                 } elsif ($diff->{'status'} eq "D") { # deleted
3681                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3682                         print "<td>";
3683                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3684                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3685                                        -class => "list"}, esc_path($diff->{'file'}));
3686                         print "</td>\n";
3687                         print "<td>$mode_chng</td>\n";
3688                         print "<td class=\"link\">";
3689                         if ($action eq 'commitdiff') {
3690                                 # link to patch
3691                                 $patchno++;
3692                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3693                                 print " | ";
3694                         }
3695                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3696                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3697                                       "blob") . " | ";
3698                         if ($have_blame) {
3699                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3700                                                              file_name=>$diff->{'file'})},
3701                                               "blame") . " | ";
3702                         }
3703                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3704                                                      file_name=>$diff->{'file'})},
3705                                       "history");
3706                         print "</td>\n";
3707
3708                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3709                         my $mode_chnge = "";
3710                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3711                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3712                                 if ($from_file_type ne $to_file_type) {
3713                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3714                                 }
3715                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3716                                         if ($from_mode_str && $to_mode_str) {
3717                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3718                                         } elsif ($to_mode_str) {
3719                                                 $mode_chnge .= " mode: $to_mode_str";
3720                                         }
3721                                 }
3722                                 $mode_chnge .= "]</span>\n";
3723                         }
3724                         print "<td>";
3725                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3726                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3727                                       -class => "list"}, esc_path($diff->{'file'}));
3728                         print "</td>\n";
3729                         print "<td>$mode_chnge</td>\n";
3730                         print "<td class=\"link\">";
3731                         if ($action eq 'commitdiff') {
3732                                 # link to patch
3733                                 $patchno++;
3734                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3735                                       " | ";
3736                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3737                                 # "commit" view and modified file (not onlu mode changed)
3738                                 print $cgi->a({-href => href(action=>"blobdiff",
3739                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3740                                                              hash_base=>$hash, hash_parent_base=>$parent,
3741                                                              file_name=>$diff->{'file'})},
3742                                               "diff") .
3743                                       " | ";
3744                         }
3745                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3746                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3747                                        "blob") . " | ";
3748                         if ($have_blame) {
3749                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3750                                                              file_name=>$diff->{'file'})},
3751                                               "blame") . " | ";
3752                         }
3753                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3754                                                      file_name=>$diff->{'file'})},
3755                                       "history");
3756                         print "</td>\n";
3757
3758                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3759                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3760                         my $nstatus = $status_name{$diff->{'status'}};
3761                         my $mode_chng = "";
3762                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3763                                 # mode also for directories, so we cannot use $to_mode_str
3764                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3765                         }
3766                         print "<td>" .
3767                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3768                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3769                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3770                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3771                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3772                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3773                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3774                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3775                               "<td class=\"link\">";
3776                         if ($action eq 'commitdiff') {
3777                                 # link to patch
3778                                 $patchno++;
3779                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3780                                       " | ";
3781                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3782                                 # "commit" view and modified file (not only pure rename or copy)
3783                                 print $cgi->a({-href => href(action=>"blobdiff",
3784                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3785                                                              hash_base=>$hash, hash_parent_base=>$parent,
3786                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3787                                               "diff") .
3788                                       " | ";
3789                         }
3790                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3791                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3792                                       "blob") . " | ";
3793                         if ($have_blame) {
3794                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3795                                                              file_name=>$diff->{'to_file'})},
3796                                               "blame") . " | ";
3797                         }
3798                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3799                                                     file_name=>$diff->{'to_file'})},
3800                                       "history");
3801                         print "</td>\n";
3802
3803                 } # we should not encounter Unmerged (U) or Unknown (X) status
3804                 print "</tr>\n";
3805         }
3806         print "</tbody>" if $has_header;
3807         print "</table>\n";
3808 }
3809
3810 sub git_patchset_body {
3811         my ($fd, $difftree, $hash, @hash_parents) = @_;
3812         my ($hash_parent) = $hash_parents[0];
3813
3814         my $is_combined = (@hash_parents > 1);
3815         my $patch_idx = 0;
3816         my $patch_number = 0;
3817         my $patch_line;
3818         my $diffinfo;
3819         my $to_name;
3820         my (%from, %to);
3821
3822         print "<div class=\"patchset\">\n";
3823
3824         # skip to first patch
3825         while ($patch_line = <$fd>) {
3826                 chomp $patch_line;
3827
3828                 last if ($patch_line =~ m/^diff /);
3829         }
3830
3831  PATCH:
3832         while ($patch_line) {
3833
3834                 # parse "git diff" header line
3835                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3836                         # $1 is from_name, which we do not use
3837                         $to_name = unquote($2);
3838                         $to_name =~ s!^b/!!;
3839                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3840                         # $1 is 'cc' or 'combined', which we do not use
3841                         $to_name = unquote($2);
3842                 } else {
3843                         $to_name = undef;
3844                 }
3845
3846                 # check if current patch belong to current raw line
3847                 # and parse raw git-diff line if needed
3848                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3849                         # this is continuation of a split patch
3850                         print "<div class=\"patch cont\">\n";
3851                 } else {
3852                         # advance raw git-diff output if needed
3853                         $patch_idx++ if defined $diffinfo;
3854
3855                         # read and prepare patch information
3856                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3857
3858                         # compact combined diff output can have some patches skipped
3859                         # find which patch (using pathname of result) we are at now;
3860                         if ($is_combined) {
3861                                 while ($to_name ne $diffinfo->{'to_file'}) {
3862                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3863                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3864                                               "</div>\n";  # class="patch"
3865
3866                                         $patch_idx++;
3867                                         $patch_number++;
3868
3869                                         last if $patch_idx > $#$difftree;
3870                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3871                                 }
3872                         }
3873
3874                         # modifies %from, %to hashes
3875                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3876
3877                         # this is first patch for raw difftree line with $patch_idx index
3878                         # we index @$difftree array from 0, but number patches from 1
3879                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3880                 }
3881
3882                 # git diff header
3883                 #assert($patch_line =~ m/^diff /) if DEBUG;
3884                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3885                 $patch_number++;
3886                 # print "git diff" header
3887                 print format_git_diff_header_line($patch_line, $diffinfo,
3888                                                   \%from, \%to);
3889
3890                 # print extended diff header
3891                 print "<div class=\"diff extended_header\">\n";
3892         EXTENDED_HEADER:
3893                 while ($patch_line = <$fd>) {
3894                         chomp $patch_line;
3895
3896                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3897
3898                         print format_extended_diff_header_line($patch_line, $diffinfo,
3899                                                                \%from, \%to);
3900                 }
3901                 print "</div>\n"; # class="diff extended_header"
3902
3903                 # from-file/to-file diff header
3904                 if (! $patch_line) {
3905                         print "</div>\n"; # class="patch"
3906                         last PATCH;
3907                 }
3908                 next PATCH if ($patch_line =~ m/^diff /);
3909                 #assert($patch_line =~ m/^---/) if DEBUG;
3910
3911                 my $last_patch_line = $patch_line;
3912                 $patch_line = <$fd>;
3913                 chomp $patch_line;
3914                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3915
3916                 print format_diff_from_to_header($last_patch_line, $patch_line,
3917                                                  $diffinfo, \%from, \%to,
3918                                                  @hash_parents);
3919
3920                 # the patch itself
3921         LINE:
3922                 while ($patch_line = <$fd>) {
3923                         chomp $patch_line;
3924
3925                         next PATCH if ($patch_line =~ m/^diff /);
3926
3927                         print format_diff_line($patch_line, \%from, \%to);
3928                 }
3929
3930         } continue {
3931                 print "</div>\n"; # class="patch"
3932         }
3933
3934         # for compact combined (--cc) format, with chunk and patch simpliciaction
3935         # patchset might be empty, but there might be unprocessed raw lines
3936         for (++$patch_idx if $patch_number > 0;
3937              $patch_idx < @$difftree;
3938              ++$patch_idx) {
3939                 # read and prepare patch information
3940                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3941
3942                 # generate anchor for "patch" links in difftree / whatchanged part
3943                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3944                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3945                       "</div>\n";  # class="patch"
3946
3947                 $patch_number++;
3948         }
3949
3950         if ($patch_number == 0) {
3951                 if (@hash_parents > 1) {
3952                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3953                 } else {
3954                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3955                 }
3956         }
3957
3958         print "</div>\n"; # class="patchset"
3959 }
3960
3961 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3962
3963 # fills project list info (age, description, owner, forks) for each
3964 # project in the list, removing invalid projects from returned list
3965 # NOTE: modifies $projlist, but does not remove entries from it
3966 sub fill_project_list_info {
3967         my ($projlist, $check_forks) = @_;
3968         my @projects;
3969
3970         my $show_ctags = gitweb_check_feature('ctags');
3971  PROJECT:
3972         foreach my $pr (@$projlist) {
3973                 my (@activity) = git_get_last_activity($pr->{'path'});
3974                 unless (@activity) {
3975                         next PROJECT;
3976                 }
3977                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3978                 if (!defined $pr->{'descr'}) {
3979                         my $descr = git_get_project_description($pr->{'path'}) || "";
3980                         $descr = to_utf8($descr);
3981                         $pr->{'descr_long'} = $descr;
3982                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3983                 }
3984                 if (!defined $pr->{'owner'}) {
3985                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3986                 }
3987                 if ($check_forks) {
3988                         my $pname = $pr->{'path'};
3989                         if (($pname =~ s/\.git$//) &&
3990                             ($pname !~ /\/$/) &&
3991                             (-d "$projectroot/$pname")) {
3992                                 $pr->{'forks'} = "-d $projectroot/$pname";
3993                         }       else {
3994                                 $pr->{'forks'} = 0;
3995                         }
3996                 }
3997                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3998                 push @projects, $pr;
3999         }
4000
4001         return @projects;
4002 }
4003
4004 # print 'sort by' <th> element, generating 'sort by $name' replay link
4005 # if that order is not selected
4006 sub print_sort_th {
4007         my ($name, $order, $header) = @_;
4008         $header ||= ucfirst($name);
4009
4010         if ($order eq $name) {
4011                 print "<th>$header</th>\n";
4012         } else {
4013                 print "<th>" .
4014                       $cgi->a({-href => href(-replay=>1, order=>$name),
4015                                -class => "header"}, $header) .
4016                       "</th>\n";
4017         }
4018 }
4019
4020 sub git_project_list_body {
4021         # actually uses global variable $project
4022         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4023
4024         my $check_forks = gitweb_check_feature('forks');
4025         my @projects = fill_project_list_info($projlist, $check_forks);
4026
4027         $order ||= $default_projects_order;
4028         $from = 0 unless defined $from;
4029         $to = $#projects if (!defined $to || $#projects < $to);
4030
4031         my %order_info = (
4032                 project => { key => 'path', type => 'str' },
4033                 descr => { key => 'descr_long', type => 'str' },
4034                 owner => { key => 'owner', type => 'str' },
4035                 age => { key => 'age', type => 'num' }
4036         );
4037         my $oi = $order_info{$order};
4038         if ($oi->{'type'} eq 'str') {
4039                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4040         } else {
4041                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4042         }
4043
4044         my $show_ctags = gitweb_check_feature('ctags');
4045         if ($show_ctags) {
4046                 my %ctags;
4047                 foreach my $p (@projects) {
4048                         foreach my $ct (keys %{$p->{'ctags'}}) {
4049                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4050                         }
4051                 }
4052                 my $cloud = git_populate_project_tagcloud(\%ctags);
4053                 print git_show_project_tagcloud($cloud, 64);
4054         }
4055
4056         print "<table class=\"project_list\">\n";
4057         unless ($no_header) {
4058                 print "<tr>\n";
4059                 if ($check_forks) {
4060                         print "<th></th>\n";
4061                 }
4062                 print_sort_th('project', $order, 'Project');
4063                 print_sort_th('descr', $order, 'Description');
4064                 print_sort_th('owner', $order, 'Owner');
4065                 print_sort_th('age', $order, 'Last Change');
4066                 print "<th></th>\n" . # for links
4067                       "</tr>\n";
4068         }
4069         my $alternate = 1;
4070         my $tagfilter = $cgi->param('by_tag');
4071         for (my $i = $from; $i <= $to; $i++) {
4072                 my $pr = $projects[$i];
4073
4074                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4075                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4076                         and not $pr->{'descr_long'} =~ /$searchtext/;
4077                 # Weed out forks or non-matching entries of search
4078                 if ($check_forks) {
4079                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4080                         $forkbase="^$forkbase" if $forkbase;
4081                         next if not $searchtext and not $tagfilter and $show_ctags
4082                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4083                 }
4084
4085                 if ($alternate) {
4086                         print "<tr class=\"dark\">\n";
4087                 } else {
4088                         print "<tr class=\"light\">\n";
4089                 }
4090                 $alternate ^= 1;
4091                 if ($check_forks) {
4092                         print "<td>";
4093                         if ($pr->{'forks'}) {
4094                                 print "<!-- $pr->{'forks'} -->\n";
4095                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4096                         }
4097                         print "</td>\n";
4098                 }
4099                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4100                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4101                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4102                                         -class => "list", -title => $pr->{'descr_long'}},
4103                                         esc_html($pr->{'descr'})) . "</td>\n" .
4104                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4105                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4106                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4107                       "<td class=\"link\">" .
4108                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4109                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4112                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4113                       "</td>\n" .
4114                       "</tr>\n";
4115         }
4116         if (defined $extra) {
4117                 print "<tr>\n";
4118                 if ($check_forks) {
4119                         print "<td></td>\n";
4120                 }
4121                 print "<td colspan=\"5\">$extra</td>\n" .
4122                       "</tr>\n";
4123         }
4124         print "</table>\n";
4125 }
4126
4127 sub git_shortlog_body {
4128         # uses global variable $project
4129         my ($commitlist, $from, $to, $refs, $extra) = @_;
4130
4131         $from = 0 unless defined $from;
4132         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4133
4134         print "<table class=\"shortlog\">\n";
4135         my $alternate = 1;
4136         for (my $i = $from; $i <= $to; $i++) {
4137                 my %co = %{$commitlist->[$i]};
4138                 my $commit = $co{'id'};
4139                 my $ref = format_ref_marker($refs, $commit);
4140                 if ($alternate) {
4141                         print "<tr class=\"dark\">\n";
4142                 } else {
4143                         print "<tr class=\"light\">\n";
4144                 }
4145                 $alternate ^= 1;
4146                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4147                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4148                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4149                       "<td><i>" . $author . "</i></td>\n" .
4150                       "<td>";
4151                 print format_subject_html($co{'title'}, $co{'title_short'},
4152                                           href(action=>"commit", hash=>$commit), $ref);
4153                 print "</td>\n" .
4154                       "<td class=\"link\">" .
4155                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4156                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4157                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4158                 my $snapshot_links = format_snapshot_links($commit);
4159                 if (defined $snapshot_links) {
4160                         print " | " . $snapshot_links;
4161                 }
4162                 print "</td>\n" .
4163                       "</tr>\n";
4164         }
4165         if (defined $extra) {
4166                 print "<tr>\n" .
4167                       "<td colspan=\"4\">$extra</td>\n" .
4168                       "</tr>\n";
4169         }
4170         print "</table>\n";
4171 }
4172
4173 sub git_history_body {
4174         # Warning: assumes constant type (blob or tree) during history
4175         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4176
4177         $from = 0 unless defined $from;
4178         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4179
4180         print "<table class=\"history\">\n";
4181         my $alternate = 1;
4182         for (my $i = $from; $i <= $to; $i++) {
4183                 my %co = %{$commitlist->[$i]};
4184                 if (!%co) {
4185                         next;
4186                 }
4187                 my $commit = $co{'id'};
4188
4189                 my $ref = format_ref_marker($refs, $commit);
4190
4191                 if ($alternate) {
4192                         print "<tr class=\"dark\">\n";
4193                 } else {
4194                         print "<tr class=\"light\">\n";
4195                 }
4196                 $alternate ^= 1;
4197         # shortlog uses      chop_str($co{'author_name'}, 10)
4198                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4199                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4200                       "<td><i>" . $author . "</i></td>\n" .
4201                       "<td>";
4202                 # originally git_history used chop_str($co{'title'}, 50)
4203                 print format_subject_html($co{'title'}, $co{'title_short'},
4204                                           href(action=>"commit", hash=>$commit), $ref);
4205                 print "</td>\n" .
4206                       "<td class=\"link\">" .
4207                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4208                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4209
4210                 if ($ftype eq 'blob') {
4211                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4212                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4213                         if (defined $blob_current && defined $blob_parent &&
4214                                         $blob_current ne $blob_parent) {
4215                                 print " | " .
4216                                         $cgi->a({-href => href(action=>"blobdiff",
4217                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4218                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4219                                                                file_name=>$file_name)},
4220                                                 "diff to current");
4221                         }
4222                 }
4223                 print "</td>\n" .
4224                       "</tr>\n";
4225         }
4226         if (defined $extra) {
4227                 print "<tr>\n" .
4228                       "<td colspan=\"4\">$extra</td>\n" .
4229                       "</tr>\n";
4230         }
4231         print "</table>\n";
4232 }
4233
4234 sub git_tags_body {
4235         # uses global variable $project
4236         my ($taglist, $from, $to, $extra) = @_;
4237         $from = 0 unless defined $from;
4238         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4239
4240         print "<table class=\"tags\">\n";
4241         my $alternate = 1;
4242         for (my $i = $from; $i <= $to; $i++) {
4243                 my $entry = $taglist->[$i];
4244                 my %tag = %$entry;
4245                 my $comment = $tag{'subject'};
4246                 my $comment_short;
4247                 if (defined $comment) {
4248                         $comment_short = chop_str($comment, 30, 5);
4249                 }
4250                 if ($alternate) {
4251                         print "<tr class=\"dark\">\n";
4252                 } else {
4253                         print "<tr class=\"light\">\n";
4254                 }
4255                 $alternate ^= 1;
4256                 if (defined $tag{'age'}) {
4257                         print "<td><i>$tag{'age'}</i></td>\n";
4258                 } else {
4259                         print "<td></td>\n";
4260                 }
4261                 print "<td>" .
4262                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4263                                -class => "list name"}, esc_html($tag{'name'})) .
4264                       "</td>\n" .
4265                       "<td>";
4266                 if (defined $comment) {
4267                         print format_subject_html($comment, $comment_short,
4268                                                   href(action=>"tag", hash=>$tag{'id'}));
4269                 }
4270                 print "</td>\n" .
4271                       "<td class=\"selflink\">";
4272                 if ($tag{'type'} eq "tag") {
4273                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4274                 } else {
4275                         print "&nbsp;";
4276                 }
4277                 print "</td>\n" .
4278                       "<td class=\"link\">" . " | " .
4279                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4280                 if ($tag{'reftype'} eq "commit") {
4281                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4282                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4283                 } elsif ($tag{'reftype'} eq "blob") {
4284                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4285                 }
4286                 print "</td>\n" .
4287                       "</tr>";
4288         }
4289         if (defined $extra) {
4290                 print "<tr>\n" .
4291                       "<td colspan=\"5\">$extra</td>\n" .
4292                       "</tr>\n";
4293         }
4294         print "</table>\n";
4295 }
4296
4297 sub git_heads_body {
4298         # uses global variable $project
4299         my ($headlist, $head, $from, $to, $extra) = @_;
4300         $from = 0 unless defined $from;
4301         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4302
4303         print "<table class=\"heads\">\n";
4304         my $alternate = 1;
4305         for (my $i = $from; $i <= $to; $i++) {
4306                 my $entry = $headlist->[$i];
4307                 my %ref = %$entry;
4308                 my $curr = $ref{'id'} eq $head;
4309                 if ($alternate) {
4310                         print "<tr class=\"dark\">\n";
4311                 } else {
4312                         print "<tr class=\"light\">\n";
4313                 }
4314                 $alternate ^= 1;
4315                 print "<td><i>$ref{'age'}</i></td>\n" .
4316                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4317                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4318                                -class => "list name"},esc_html($ref{'name'})) .
4319                       "</td>\n" .
4320                       "<td class=\"link\">" .
4321                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4322                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4323                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4324                       "</td>\n" .
4325                       "</tr>";
4326         }
4327         if (defined $extra) {
4328                 print "<tr>\n" .
4329                       "<td colspan=\"3\">$extra</td>\n" .
4330                       "</tr>\n";
4331         }
4332         print "</table>\n";
4333 }
4334
4335 sub git_search_grep_body {
4336         my ($commitlist, $from, $to, $extra) = @_;
4337         $from = 0 unless defined $from;
4338         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4339
4340         print "<table class=\"commit_search\">\n";
4341         my $alternate = 1;
4342         for (my $i = $from; $i <= $to; $i++) {
4343                 my %co = %{$commitlist->[$i]};
4344                 if (!%co) {
4345                         next;
4346                 }
4347                 my $commit = $co{'id'};
4348                 if ($alternate) {
4349                         print "<tr class=\"dark\">\n";
4350                 } else {
4351                         print "<tr class=\"light\">\n";
4352                 }
4353                 $alternate ^= 1;
4354                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4355                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4356                       "<td><i>" . $author . "</i></td>\n" .
4357                       "<td>" .
4358                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4359                                -class => "list subject"},
4360                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4361                 my $comment = $co{'comment'};
4362                 foreach my $line (@$comment) {
4363                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4364                                 my ($lead, $match, $trail) = ($1, $2, $3);
4365                                 $match = chop_str($match, 70, 5, 'center');
4366                                 my $contextlen = int((80 - length($match))/2);
4367                                 $contextlen = 30 if ($contextlen > 30);
4368                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4369                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4370
4371                                 $lead  = esc_html($lead);
4372                                 $match = esc_html($match);
4373                                 $trail = esc_html($trail);
4374
4375                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4376                         }
4377                 }
4378                 print "</td>\n" .
4379                       "<td class=\"link\">" .
4380                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4381                       " | " .
4382                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4383                       " | " .
4384                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4385                 print "</td>\n" .
4386                       "</tr>\n";
4387         }
4388         if (defined $extra) {
4389                 print "<tr>\n" .
4390                       "<td colspan=\"3\">$extra</td>\n" .
4391                       "</tr>\n";
4392         }
4393         print "</table>\n";
4394 }
4395
4396 ## ======================================================================
4397 ## ======================================================================
4398 ## actions
4399
4400 sub git_project_list {
4401         my $order = $input_params{'order'};
4402         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4403                 die_error(400, "Unknown order parameter");
4404         }
4405
4406         my @list = git_get_projects_list();
4407         if (!@list) {
4408                 die_error(404, "No projects found");
4409         }
4410
4411         git_header_html();
4412         if (-f $home_text) {
4413                 print "<div class=\"index_include\">\n";
4414                 insert_file($home_text);
4415                 print "</div>\n";
4416         }
4417         print $cgi->startform(-method => "get") .
4418               "<p class=\"projsearch\">Search:\n" .
4419               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4420               "</p>" .
4421               $cgi->end_form() . "\n";
4422         git_project_list_body(\@list, $order);
4423         git_footer_html();
4424 }
4425
4426 sub git_forks {
4427         my $order = $input_params{'order'};
4428         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4429                 die_error(400, "Unknown order parameter");
4430         }
4431
4432         my @list = git_get_projects_list($project);
4433         if (!@list) {
4434                 die_error(404, "No forks found");
4435         }
4436
4437         git_header_html();
4438         git_print_page_nav('','');
4439         git_print_header_div('summary', "$project forks");
4440         git_project_list_body(\@list, $order);
4441         git_footer_html();
4442 }
4443
4444 sub git_project_index {
4445         my @projects = git_get_projects_list($project);
4446
4447         print $cgi->header(
4448                 -type => 'text/plain',
4449                 -charset => 'utf-8',
4450                 -content_disposition => 'inline; filename="index.aux"');
4451
4452         foreach my $pr (@projects) {
4453                 if (!exists $pr->{'owner'}) {
4454                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4455                 }
4456
4457                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4458                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4459                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4460                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4461                 $path  =~ s/ /\+/g;
4462                 $owner =~ s/ /\+/g;
4463
4464                 print "$path $owner\n";
4465         }
4466 }
4467
4468 sub git_summary {
4469         my $descr = git_get_project_description($project) || "none";
4470         my %co = parse_commit("HEAD");
4471         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4472         my $head = $co{'id'};
4473
4474         my $owner = git_get_project_owner($project);
4475
4476         my $refs = git_get_references();
4477         # These get_*_list functions return one more to allow us to see if
4478         # there are more ...
4479         my @taglist  = git_get_tags_list(16);
4480         my @headlist = git_get_heads_list(16);
4481         my @forklist;
4482         my $check_forks = gitweb_check_feature('forks');
4483
4484         if ($check_forks) {
4485                 @forklist = git_get_projects_list($project);
4486         }
4487
4488         git_header_html();
4489         git_print_page_nav('summary','', $head);
4490
4491         print "<div class=\"title\">&nbsp;</div>\n";
4492         print "<table class=\"projects_list\">\n" .
4493               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4494               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4495         if (defined $cd{'rfc2822'}) {
4496                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4497         }
4498
4499         # use per project git URL list in $projectroot/$project/cloneurl
4500         # or make project git URL from git base URL and project name
4501         my $url_tag = "URL";
4502         my @url_list = git_get_project_url_list($project);
4503         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4504         foreach my $git_url (@url_list) {
4505                 next unless $git_url;
4506                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4507                 $url_tag = "";
4508         }
4509
4510         # Tag cloud
4511         my $show_ctags = gitweb_check_feature('ctags');
4512         if ($show_ctags) {
4513                 my $ctags = git_get_project_ctags($project);
4514                 my $cloud = git_populate_project_tagcloud($ctags);
4515                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4516                 print "</td>\n<td>" unless %$ctags;
4517                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4518                 print "</td>\n<td>" if %$ctags;
4519                 print git_show_project_tagcloud($cloud, 48);
4520                 print "</td></tr>";
4521         }
4522
4523         print "</table>\n";
4524
4525         # If XSS prevention is on, we don't include README.html.
4526         # TODO: Allow a readme in some safe format.
4527         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4528                 print "<div class=\"title\">readme</div>\n" .
4529                       "<div class=\"readme\">\n";
4530                 insert_file("$projectroot/$project/README.html");
4531                 print "\n</div>\n"; # class="readme"
4532         }
4533
4534         # we need to request one more than 16 (0..15) to check if
4535         # those 16 are all
4536         my @commitlist = $head ? parse_commits($head, 17) : ();
4537         if (@commitlist) {
4538                 git_print_header_div('shortlog');
4539                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4540                                   $#commitlist <=  15 ? undef :
4541                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4542         }
4543
4544         if (@taglist) {
4545                 git_print_header_div('tags');
4546                 git_tags_body(\@taglist, 0, 15,
4547                               $#taglist <=  15 ? undef :
4548                               $cgi->a({-href => href(action=>"tags")}, "..."));
4549         }
4550
4551         if (@headlist) {
4552                 git_print_header_div('heads');
4553                 git_heads_body(\@headlist, $head, 0, 15,
4554                                $#headlist <= 15 ? undef :
4555                                $cgi->a({-href => href(action=>"heads")}, "..."));
4556         }
4557
4558         if (@forklist) {
4559                 git_print_header_div('forks');
4560                 git_project_list_body(\@forklist, 'age', 0, 15,
4561                                       $#forklist <= 15 ? undef :
4562                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4563                                       'no_header');
4564         }
4565
4566         git_footer_html();
4567 }
4568
4569 sub git_tag {
4570         my $head = git_get_head_hash($project);
4571         git_header_html();
4572         git_print_page_nav('','', $head,undef,$head);
4573         my %tag = parse_tag($hash);
4574
4575         if (! %tag) {
4576                 die_error(404, "Unknown tag object");
4577         }
4578
4579         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4580         print "<div class=\"title_text\">\n" .
4581               "<table class=\"object_header\">\n" .
4582               "<tr>\n" .
4583               "<td>object</td>\n" .
4584               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4585                                $tag{'object'}) . "</td>\n" .
4586               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4587                                               $tag{'type'}) . "</td>\n" .
4588               "</tr>\n";
4589         if (defined($tag{'author'})) {
4590                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4591                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4592                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4593                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4594                         "</td></tr>\n";
4595         }
4596         print "</table>\n\n" .
4597               "</div>\n";
4598         print "<div class=\"page_body\">";
4599         my $comment = $tag{'comment'};
4600         foreach my $line (@$comment) {
4601                 chomp $line;
4602                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4603         }
4604         print "</div>\n";
4605         git_footer_html();
4606 }
4607
4608 sub git_blame {
4609         # permissions
4610         gitweb_check_feature('blame')
4611                 or die_error(403, "Blame view not allowed");
4612
4613         # error checking
4614         die_error(400, "No file name given") unless $file_name;
4615         $hash_base ||= git_get_head_hash($project);
4616         die_error(404, "Couldn't find base commit") unless $hash_base;
4617         my %co = parse_commit($hash_base)
4618                 or die_error(404, "Commit not found");
4619         my $ftype = "blob";
4620         if (!defined $hash) {
4621                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4622                         or die_error(404, "Error looking up file");
4623         } else {
4624                 $ftype = git_get_type($hash);
4625                 if ($ftype !~ "blob") {
4626                         die_error(400, "Object is not a blob");
4627                 }
4628         }
4629
4630         # run git-blame --porcelain
4631         open my $fd, "-|", git_cmd(), "blame", '-p',
4632                 $hash_base, '--', $file_name
4633                 or die_error(500, "Open git-blame failed");
4634
4635         # page header
4636         git_header_html();
4637         my $formats_nav =
4638                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4639                         "blob") .
4640                 " | " .
4641                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4642                         "history") .
4643                 " | " .
4644                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4645                         "HEAD");
4646         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4647         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4648         git_print_page_path($file_name, $ftype, $hash_base);
4649
4650         # page body
4651         my @rev_color = qw(light2 dark2);
4652         my $num_colors = scalar(@rev_color);
4653         my $current_color = 0;
4654         my %metainfo = ();
4655
4656         print <<HTML;
4657 <div class="page_body">
4658 <table class="blame">
4659 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4660 HTML
4661  LINE:
4662         while (my $line = <$fd>) {
4663                 chomp $line;
4664                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4665                 # no <lines in group> for subsequent lines in group of lines
4666                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4667                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4668                 if (!exists $metainfo{$full_rev}) {
4669                         $metainfo{$full_rev} = {};
4670                 }
4671                 my $meta = $metainfo{$full_rev};
4672                 my $data;
4673                 while ($data = <$fd>) {
4674                         chomp $data;
4675                         last if ($data =~ s/^\t//); # contents of line
4676                         if ($data =~ /^(\S+) (.*)$/) {
4677                                 $meta->{$1} = $2;
4678                         }
4679                 }
4680                 my $short_rev = substr($full_rev, 0, 8);
4681                 my $author = $meta->{'author'};
4682                 my %date =
4683                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4684                 my $date = $date{'iso-tz'};
4685                 if ($group_size) {
4686                         $current_color = ($current_color + 1) % $num_colors;
4687                 }
4688                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4689                 if ($group_size) {
4690                         print "<td class=\"sha1\"";
4691                         print " title=\"". esc_html($author) . ", $date\"";
4692                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4693                         print ">";
4694                         print $cgi->a({-href => href(action=>"commit",
4695                                                      hash=>$full_rev,
4696                                                      file_name=>$file_name)},
4697                                       esc_html($short_rev));
4698                         print "</td>\n";
4699                 }
4700                 my $parent_commit;
4701                 if (!exists $meta->{'parent'}) {
4702                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4703                                 or die_error(500, "Open git-rev-parse failed");
4704                         $parent_commit = <$dd>;
4705                         close $dd;
4706                         chomp($parent_commit);
4707                         $meta->{'parent'} = $parent_commit;
4708                 } else {
4709                         $parent_commit = $meta->{'parent'};
4710                 }
4711                 my $blamed = href(action => 'blame',
4712                                   file_name => $meta->{'filename'},
4713                                   hash_base => $parent_commit);
4714                 print "<td class=\"linenr\">";
4715                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4716                                 -class => "linenr" },
4717                               esc_html($lineno));
4718                 print "</td>";
4719                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4720                 print "</tr>\n";
4721         }
4722         print "</table>\n";
4723         print "</div>";
4724         close $fd
4725                 or print "Reading blob failed\n";
4726
4727         # page footer
4728         git_footer_html();
4729 }
4730
4731 sub git_tags {
4732         my $head = git_get_head_hash($project);
4733         git_header_html();
4734         git_print_page_nav('','', $head,undef,$head);
4735         git_print_header_div('summary', $project);
4736
4737         my @tagslist = git_get_tags_list();
4738         if (@tagslist) {
4739                 git_tags_body(\@tagslist);
4740         }
4741         git_footer_html();
4742 }
4743
4744 sub git_heads {
4745         my $head = git_get_head_hash($project);
4746         git_header_html();
4747         git_print_page_nav('','', $head,undef,$head);
4748         git_print_header_div('summary', $project);
4749
4750         my @headslist = git_get_heads_list();
4751         if (@headslist) {
4752                 git_heads_body(\@headslist, $head);
4753         }
4754         git_footer_html();
4755 }
4756
4757 sub git_blob_plain {
4758         my $type = shift;
4759         my $expires;
4760
4761         if (!defined $hash) {
4762                 if (defined $file_name) {
4763                         my $base = $hash_base || git_get_head_hash($project);
4764                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4765                                 or die_error(404, "Cannot find file");
4766                 } else {
4767                         die_error(400, "No file name defined");
4768                 }
4769         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4770                 # blobs defined by non-textual hash id's can be cached
4771                 $expires = "+1d";
4772         }
4773
4774         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4775                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4776
4777         # content-type (can include charset)
4778         $type = blob_contenttype($fd, $file_name, $type);
4779
4780         # "save as" filename, even when no $file_name is given
4781         my $save_as = "$hash";
4782         if (defined $file_name) {
4783                 $save_as = $file_name;
4784         } elsif ($type =~ m/^text\//) {
4785                 $save_as .= '.txt';
4786         }
4787
4788         # With XSS prevention on, blobs of all types except a few known safe
4789         # ones are served with "Content-Disposition: attachment" to make sure
4790         # they don't run in our security domain.  For certain image types,
4791         # blob view writes an <img> tag referring to blob_plain view, and we
4792         # want to be sure not to break that by serving the image as an
4793         # attachment (though Firefox 3 doesn't seem to care).
4794         my $sandbox = $prevent_xss &&
4795                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4796
4797         print $cgi->header(
4798                 -type => $type,
4799                 -expires => $expires,
4800                 -content_disposition =>
4801                         ($sandbox ? 'attachment' : 'inline')
4802                         . '; filename="' . $save_as . '"');
4803         undef $/;
4804         binmode STDOUT, ':raw';
4805         print <$fd>;
4806         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4807         $/ = "\n";
4808         close $fd;
4809 }
4810
4811 sub git_blob {
4812         my $expires;
4813
4814         if (!defined $hash) {
4815                 if (defined $file_name) {
4816                         my $base = $hash_base || git_get_head_hash($project);
4817                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4818                                 or die_error(404, "Cannot find file");
4819                 } else {
4820                         die_error(400, "No file name defined");
4821                 }
4822         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4823                 # blobs defined by non-textual hash id's can be cached
4824                 $expires = "+1d";
4825         }
4826
4827         my $have_blame = gitweb_check_feature('blame');
4828         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4829                 or die_error(500, "Couldn't cat $file_name, $hash");
4830         my $mimetype = blob_mimetype($fd, $file_name);
4831         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4832                 close $fd;
4833                 return git_blob_plain($mimetype);
4834         }
4835         # we can have blame only for text/* mimetype
4836         $have_blame &&= ($mimetype =~ m!^text/!);
4837
4838         git_header_html(undef, $expires);
4839         my $formats_nav = '';
4840         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4841                 if (defined $file_name) {
4842                         if ($have_blame) {
4843                                 $formats_nav .=
4844                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4845                                                 "blame") .
4846                                         " | ";
4847                         }
4848                         $formats_nav .=
4849                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4850                                         "history") .
4851                                 " | " .
4852                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4853                                         "raw") .
4854                                 " | " .
4855                                 $cgi->a({-href => href(action=>"blob",
4856                                                        hash_base=>"HEAD", file_name=>$file_name)},
4857                                         "HEAD");
4858                 } else {
4859                         $formats_nav .=
4860                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4861                                         "raw");
4862                 }
4863                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4864                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4865         } else {
4866                 print "<div class=\"page_nav\">\n" .
4867                       "<br/><br/></div>\n" .
4868                       "<div class=\"title\">$hash</div>\n";
4869         }
4870         git_print_page_path($file_name, "blob", $hash_base);
4871         print "<div class=\"page_body\">\n";
4872         if ($mimetype =~ m!^image/!) {
4873                 print qq!<img type="$mimetype"!;
4874                 if ($file_name) {
4875                         print qq! alt="$file_name" title="$file_name"!;
4876                 }
4877                 print qq! src="! .
4878                       href(action=>"blob_plain", hash=>$hash,
4879                            hash_base=>$hash_base, file_name=>$file_name) .
4880                       qq!" />\n!;
4881         } else {
4882                 my $nr;
4883                 while (my $line = <$fd>) {
4884                         chomp $line;
4885                         $nr++;
4886                         $line = untabify($line);
4887                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4888                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4889                 }
4890         }
4891         close $fd
4892                 or print "Reading blob failed.\n";
4893         print "</div>";
4894         git_footer_html();
4895 }
4896
4897 sub git_tree {
4898         if (!defined $hash_base) {
4899                 $hash_base = "HEAD";
4900         }
4901         if (!defined $hash) {
4902                 if (defined $file_name) {
4903                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4904                 } else {
4905                         $hash = $hash_base;
4906                 }
4907         }
4908         die_error(404, "No such tree") unless defined($hash);
4909         $/ = "\0";
4910         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4911                 or die_error(500, "Open git-ls-tree failed");
4912         my @entries = map { chomp; $_ } <$fd>;
4913         close $fd or die_error(404, "Reading tree failed");
4914         $/ = "\n";
4915
4916         my $refs = git_get_references();
4917         my $ref = format_ref_marker($refs, $hash_base);
4918         git_header_html();
4919         my $basedir = '';
4920         my $have_blame = gitweb_check_feature('blame');
4921         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4922                 my @views_nav = ();
4923                 if (defined $file_name) {
4924                         push @views_nav,
4925                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4926                                         "history"),
4927                                 $cgi->a({-href => href(action=>"tree",
4928                                                        hash_base=>"HEAD", file_name=>$file_name)},
4929                                         "HEAD"),
4930                 }
4931                 my $snapshot_links = format_snapshot_links($hash);
4932                 if (defined $snapshot_links) {
4933                         # FIXME: Should be available when we have no hash base as well.
4934                         push @views_nav, $snapshot_links;
4935                 }
4936                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4937                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4938         } else {
4939                 undef $hash_base;
4940                 print "<div class=\"page_nav\">\n";
4941                 print "<br/><br/></div>\n";
4942                 print "<div class=\"title\">$hash</div>\n";
4943         }
4944         if (defined $file_name) {
4945                 $basedir = $file_name;
4946                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4947                         $basedir .= '/';
4948                 }
4949                 git_print_page_path($file_name, 'tree', $hash_base);
4950         }
4951         print "<div class=\"page_body\">\n";
4952         print "<table class=\"tree\">\n";
4953         my $alternate = 1;
4954         # '..' (top directory) link if possible
4955         if (defined $hash_base &&
4956             defined $file_name && $file_name =~ m![^/]+$!) {
4957                 if ($alternate) {
4958                         print "<tr class=\"dark\">\n";
4959                 } else {
4960                         print "<tr class=\"light\">\n";
4961                 }
4962                 $alternate ^= 1;
4963
4964                 my $up = $file_name;
4965                 $up =~ s!/?[^/]+$!!;
4966                 undef $up unless $up;
4967                 # based on git_print_tree_entry
4968                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4969                 print '<td class="list">';
4970                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4971                                              file_name=>$up)},
4972                               "..");
4973                 print "</td>\n";
4974                 print "<td class=\"link\"></td>\n";
4975
4976                 print "</tr>\n";
4977         }
4978         foreach my $line (@entries) {
4979                 my %t = parse_ls_tree_line($line, -z => 1);
4980
4981                 if ($alternate) {
4982                         print "<tr class=\"dark\">\n";
4983                 } else {
4984                         print "<tr class=\"light\">\n";
4985                 }
4986                 $alternate ^= 1;
4987
4988                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4989
4990                 print "</tr>\n";
4991         }
4992         print "</table>\n" .
4993               "</div>";
4994         git_footer_html();
4995 }
4996
4997 sub git_snapshot {
4998         my $format = $input_params{'snapshot_format'};
4999         if (!@snapshot_fmts) {
5000                 die_error(403, "Snapshots not allowed");
5001         }
5002         # default to first supported snapshot format
5003         $format ||= $snapshot_fmts[0];
5004         if ($format !~ m/^[a-z0-9]+$/) {
5005                 die_error(400, "Invalid snapshot format parameter");
5006         } elsif (!exists($known_snapshot_formats{$format})) {
5007                 die_error(400, "Unknown snapshot format");
5008         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5009                 die_error(403, "Unsupported snapshot format");
5010         }
5011
5012         if (!defined $hash) {
5013                 $hash = git_get_head_hash($project);
5014         }
5015
5016         my $name = $project;
5017         $name =~ s,([^/])/*\.git$,$1,;
5018         $name = basename($name);
5019         my $filename = to_utf8($name);
5020         $name =~ s/\047/\047\\\047\047/g;
5021         my $cmd;
5022         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5023         $cmd = quote_command(
5024                 git_cmd(), 'archive',
5025                 "--format=$known_snapshot_formats{$format}{'format'}",
5026                 "--prefix=$name/", $hash);
5027         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5028                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5029         }
5030
5031         print $cgi->header(
5032                 -type => $known_snapshot_formats{$format}{'type'},
5033                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5034                 -status => '200 OK');
5035
5036         open my $fd, "-|", $cmd
5037                 or die_error(500, "Execute git-archive failed");
5038         binmode STDOUT, ':raw';
5039         print <$fd>;
5040         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5041         close $fd;
5042 }
5043
5044 sub git_log {
5045         my $head = git_get_head_hash($project);
5046         if (!defined $hash) {
5047                 $hash = $head;
5048         }
5049         if (!defined $page) {
5050                 $page = 0;
5051         }
5052         my $refs = git_get_references();
5053
5054         my @commitlist = parse_commits($hash, 101, (100 * $page));
5055
5056         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5057
5058         my ($patch_max) = gitweb_get_feature('patches');
5059         if ($patch_max) {
5060                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5061                         $paging_nav .= " &sdot; " .
5062                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5063                                         "patches");
5064                 }
5065         }
5066
5067         git_header_html();
5068         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5069
5070         if (!@commitlist) {
5071                 my %co = parse_commit($hash);
5072
5073                 git_print_header_div('summary', $project);
5074                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5075         }
5076         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5077         for (my $i = 0; $i <= $to; $i++) {
5078                 my %co = %{$commitlist[$i]};
5079                 next if !%co;
5080                 my $commit = $co{'id'};
5081                 my $ref = format_ref_marker($refs, $commit);
5082                 my %ad = parse_date($co{'author_epoch'});
5083                 git_print_header_div('commit',
5084                                "<span class=\"age\">$co{'age_string'}</span>" .
5085                                esc_html($co{'title'}) . $ref,
5086                                $commit);
5087                 print "<div class=\"title_text\">\n" .
5088                       "<div class=\"log_link\">\n" .
5089                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5090                       " | " .
5091                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5092                       " | " .
5093                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5094                       "<br/>\n" .
5095                       "</div>\n" .
5096                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5097                       "</div>\n";
5098
5099                 print "<div class=\"log_body\">\n";
5100                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5101                 print "</div>\n";
5102         }
5103         if ($#commitlist >= 100) {
5104                 print "<div class=\"page_nav\">\n";
5105                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5106                                -accesskey => "n", -title => "Alt-n"}, "next");
5107                 print "</div>\n";
5108         }
5109         git_footer_html();
5110 }
5111
5112 sub git_commit {
5113         $hash ||= $hash_base || "HEAD";
5114         my %co = parse_commit($hash)
5115             or die_error(404, "Unknown commit object");
5116         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5117         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5118
5119         my $parent  = $co{'parent'};
5120         my $parents = $co{'parents'}; # listref
5121
5122         # we need to prepare $formats_nav before any parameter munging
5123         my $formats_nav;
5124         if (!defined $parent) {
5125                 # --root commitdiff
5126                 $formats_nav .= '(initial)';
5127         } elsif (@$parents == 1) {
5128                 # single parent commit
5129                 $formats_nav .=
5130                         '(parent: ' .
5131                         $cgi->a({-href => href(action=>"commit",
5132                                                hash=>$parent)},
5133                                 esc_html(substr($parent, 0, 7))) .
5134                         ')';
5135         } else {
5136                 # merge commit
5137                 $formats_nav .=
5138                         '(merge: ' .
5139                         join(' ', map {
5140                                 $cgi->a({-href => href(action=>"commit",
5141                                                        hash=>$_)},
5142                                         esc_html(substr($_, 0, 7)));
5143                         } @$parents ) .
5144                         ')';
5145         }
5146         if (gitweb_check_feature('patches')) {
5147                 $formats_nav .= " | " .
5148                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5149                                 "patch");
5150         }
5151
5152         if (!defined $parent) {
5153                 $parent = "--root";
5154         }
5155         my @difftree;
5156         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5157                 @diff_opts,
5158                 (@$parents <= 1 ? $parent : '-c'),
5159                 $hash, "--"
5160                 or die_error(500, "Open git-diff-tree failed");
5161         @difftree = map { chomp; $_ } <$fd>;
5162         close $fd or die_error(404, "Reading git-diff-tree failed");
5163
5164         # non-textual hash id's can be cached
5165         my $expires;
5166         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5167                 $expires = "+1d";
5168         }
5169         my $refs = git_get_references();
5170         my $ref = format_ref_marker($refs, $co{'id'});
5171
5172         git_header_html(undef, $expires);
5173         git_print_page_nav('commit', '',
5174                            $hash, $co{'tree'}, $hash,
5175                            $formats_nav);
5176
5177         if (defined $co{'parent'}) {
5178                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5179         } else {
5180                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5181         }
5182         print "<div class=\"title_text\">\n" .
5183               "<table class=\"object_header\">\n";
5184         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5185               "<tr>" .
5186               "<td></td><td> $ad{'rfc2822'}";
5187         if ($ad{'hour_local'} < 6) {
5188                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5189                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5190         } else {
5191                 printf(" (%02d:%02d %s)",
5192                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5193         }
5194         print "</td>" .
5195               "</tr>\n";
5196         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5197         print "<tr><td></td><td> $cd{'rfc2822'}" .
5198               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5199               "</td></tr>\n";
5200         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5201         print "<tr>" .
5202               "<td>tree</td>" .
5203               "<td class=\"sha1\">" .
5204               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5205                        class => "list"}, $co{'tree'}) .
5206               "</td>" .
5207               "<td class=\"link\">" .
5208               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5209                       "tree");
5210         my $snapshot_links = format_snapshot_links($hash);
5211         if (defined $snapshot_links) {
5212                 print " | " . $snapshot_links;
5213         }
5214         print "</td>" .
5215               "</tr>\n";
5216
5217         foreach my $par (@$parents) {
5218                 print "<tr>" .
5219                       "<td>parent</td>" .
5220                       "<td class=\"sha1\">" .
5221                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5222                                class => "list"}, $par) .
5223                       "</td>" .
5224                       "<td class=\"link\">" .
5225                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5226                       " | " .
5227                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5228                       "</td>" .
5229                       "</tr>\n";
5230         }
5231         print "</table>".
5232               "</div>\n";
5233
5234         print "<div class=\"page_body\">\n";
5235         git_print_log($co{'comment'});
5236         print "</div>\n";
5237
5238         git_difftree_body(\@difftree, $hash, @$parents);
5239
5240         git_footer_html();
5241 }
5242
5243 sub git_object {
5244         # object is defined by:
5245         # - hash or hash_base alone
5246         # - hash_base and file_name
5247         my $type;
5248
5249         # - hash or hash_base alone
5250         if ($hash || ($hash_base && !defined $file_name)) {
5251                 my $object_id = $hash || $hash_base;
5252
5253                 open my $fd, "-|", quote_command(
5254                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5255                         or die_error(404, "Object does not exist");
5256                 $type = <$fd>;
5257                 chomp $type;
5258                 close $fd
5259                         or die_error(404, "Object does not exist");
5260
5261         # - hash_base and file_name
5262         } elsif ($hash_base && defined $file_name) {
5263                 $file_name =~ s,/+$,,;
5264
5265                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5266                         or die_error(404, "Base object does not exist");
5267
5268                 # here errors should not hapen
5269                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5270                         or die_error(500, "Open git-ls-tree failed");
5271                 my $line = <$fd>;
5272                 close $fd;
5273
5274                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5275                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5276                         die_error(404, "File or directory for given base does not exist");
5277                 }
5278                 $type = $2;
5279                 $hash = $3;
5280         } else {
5281                 die_error(400, "Not enough information to find object");
5282         }
5283
5284         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5285                                           hash=>$hash, hash_base=>$hash_base,
5286                                           file_name=>$file_name),
5287                              -status => '302 Found');
5288 }
5289
5290 sub git_blobdiff {
5291         my $format = shift || 'html';
5292
5293         my $fd;
5294         my @difftree;
5295         my %diffinfo;
5296         my $expires;
5297
5298         # preparing $fd and %diffinfo for git_patchset_body
5299         # new style URI
5300         if (defined $hash_base && defined $hash_parent_base) {
5301                 if (defined $file_name) {
5302                         # read raw output
5303                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5304                                 $hash_parent_base, $hash_base,
5305                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5306                                 or die_error(500, "Open git-diff-tree failed");
5307                         @difftree = map { chomp; $_ } <$fd>;
5308                         close $fd
5309                                 or die_error(404, "Reading git-diff-tree failed");
5310                         @difftree
5311                                 or die_error(404, "Blob diff not found");
5312
5313                 } elsif (defined $hash &&
5314                          $hash =~ /[0-9a-fA-F]{40}/) {
5315                         # try to find filename from $hash
5316
5317                         # read filtered raw output
5318                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5319                                 $hash_parent_base, $hash_base, "--"
5320                                 or die_error(500, "Open git-diff-tree failed");
5321                         @difftree =
5322                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5323                                 # $hash == to_id
5324                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5325                                 map { chomp; $_ } <$fd>;
5326                         close $fd
5327                                 or die_error(404, "Reading git-diff-tree failed");
5328                         @difftree
5329                                 or die_error(404, "Blob diff not found");
5330
5331                 } else {
5332                         die_error(400, "Missing one of the blob diff parameters");
5333                 }
5334
5335                 if (@difftree > 1) {
5336                         die_error(400, "Ambiguous blob diff specification");
5337                 }
5338
5339                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5340                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5341                 $file_name   ||= $diffinfo{'to_file'};
5342
5343                 $hash_parent ||= $diffinfo{'from_id'};
5344                 $hash        ||= $diffinfo{'to_id'};
5345
5346                 # non-textual hash id's can be cached
5347                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5348                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5349                         $expires = '+1d';
5350                 }
5351
5352                 # open patch output
5353                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5354                         '-p', ($format eq 'html' ? "--full-index" : ()),
5355                         $hash_parent_base, $hash_base,
5356                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5357                         or die_error(500, "Open git-diff-tree failed");
5358         }
5359
5360         # old/legacy style URI -- not generated anymore since 1.4.3.
5361         if (!%diffinfo) {
5362                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5363         }
5364
5365         # header
5366         if ($format eq 'html') {
5367                 my $formats_nav =
5368                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5369                                 "raw");
5370                 git_header_html(undef, $expires);
5371                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5372                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5373                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5374                 } else {
5375                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5376                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5377                 }
5378                 if (defined $file_name) {
5379                         git_print_page_path($file_name, "blob", $hash_base);
5380                 } else {
5381                         print "<div class=\"page_path\"></div>\n";
5382                 }
5383
5384         } elsif ($format eq 'plain') {
5385                 print $cgi->header(
5386                         -type => 'text/plain',
5387                         -charset => 'utf-8',
5388                         -expires => $expires,
5389                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5390
5391                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5392
5393         } else {
5394                 die_error(400, "Unknown blobdiff format");
5395         }
5396
5397         # patch
5398         if ($format eq 'html') {
5399                 print "<div class=\"page_body\">\n";
5400
5401                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5402                 close $fd;
5403
5404                 print "</div>\n"; # class="page_body"
5405                 git_footer_html();
5406
5407         } else {
5408                 while (my $line = <$fd>) {
5409                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5410                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5411
5412                         print $line;
5413
5414                         last if $line =~ m!^\+\+\+!;
5415                 }
5416                 local $/ = undef;
5417                 print <$fd>;
5418                 close $fd;
5419         }
5420 }
5421
5422 sub git_blobdiff_plain {
5423         git_blobdiff('plain');
5424 }
5425
5426 sub git_commitdiff {
5427         my %params = @_;
5428         my $format = $params{-format} || 'html';
5429
5430         my ($patch_max) = gitweb_get_feature('patches');
5431         if ($format eq 'patch') {
5432                 die_error(403, "Patch view not allowed") unless $patch_max;
5433         }
5434
5435         $hash ||= $hash_base || "HEAD";
5436         my %co = parse_commit($hash)
5437             or die_error(404, "Unknown commit object");
5438
5439         # choose format for commitdiff for merge
5440         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5441                 $hash_parent = '--cc';
5442         }
5443         # we need to prepare $formats_nav before almost any parameter munging
5444         my $formats_nav;
5445         if ($format eq 'html') {
5446                 $formats_nav =
5447                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5448                                 "raw");
5449                 if ($patch_max) {
5450                         $formats_nav .= " | " .
5451                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5452                                         "patch");
5453                 }
5454
5455                 if (defined $hash_parent &&
5456                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5457                         # commitdiff with two commits given
5458                         my $hash_parent_short = $hash_parent;
5459                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5460                                 $hash_parent_short = substr($hash_parent, 0, 7);
5461                         }
5462                         $formats_nav .=
5463                                 ' (from';
5464                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5465                                 if ($co{'parents'}[$i] eq $hash_parent) {
5466                                         $formats_nav .= ' parent ' . ($i+1);
5467                                         last;
5468                                 }
5469                         }
5470                         $formats_nav .= ': ' .
5471                                 $cgi->a({-href => href(action=>"commitdiff",
5472                                                        hash=>$hash_parent)},
5473                                         esc_html($hash_parent_short)) .
5474                                 ')';
5475                 } elsif (!$co{'parent'}) {
5476                         # --root commitdiff
5477                         $formats_nav .= ' (initial)';
5478                 } elsif (scalar @{$co{'parents'}} == 1) {
5479                         # single parent commit
5480                         $formats_nav .=
5481                                 ' (parent: ' .
5482                                 $cgi->a({-href => href(action=>"commitdiff",
5483                                                        hash=>$co{'parent'})},
5484                                         esc_html(substr($co{'parent'}, 0, 7))) .
5485                                 ')';
5486                 } else {
5487                         # merge commit
5488                         if ($hash_parent eq '--cc') {
5489                                 $formats_nav .= ' | ' .
5490                                         $cgi->a({-href => href(action=>"commitdiff",
5491                                                                hash=>$hash, hash_parent=>'-c')},
5492                                                 'combined');
5493                         } else { # $hash_parent eq '-c'
5494                                 $formats_nav .= ' | ' .
5495                                         $cgi->a({-href => href(action=>"commitdiff",
5496                                                                hash=>$hash, hash_parent=>'--cc')},
5497                                                 'compact');
5498                         }
5499                         $formats_nav .=
5500                                 ' (merge: ' .
5501                                 join(' ', map {
5502                                         $cgi->a({-href => href(action=>"commitdiff",
5503                                                                hash=>$_)},
5504                                                 esc_html(substr($_, 0, 7)));
5505                                 } @{$co{'parents'}} ) .
5506                                 ')';
5507                 }
5508         }
5509
5510         my $hash_parent_param = $hash_parent;
5511         if (!defined $hash_parent_param) {
5512                 # --cc for multiple parents, --root for parentless
5513                 $hash_parent_param =
5514                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5515         }
5516
5517         # read commitdiff
5518         my $fd;
5519         my @difftree;
5520         if ($format eq 'html') {
5521                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5522                         "--no-commit-id", "--patch-with-raw", "--full-index",
5523                         $hash_parent_param, $hash, "--"
5524                         or die_error(500, "Open git-diff-tree failed");
5525
5526                 while (my $line = <$fd>) {
5527                         chomp $line;
5528                         # empty line ends raw part of diff-tree output
5529                         last unless $line;
5530                         push @difftree, scalar parse_difftree_raw_line($line);
5531                 }
5532
5533         } elsif ($format eq 'plain') {
5534                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5535                         '-p', $hash_parent_param, $hash, "--"
5536                         or die_error(500, "Open git-diff-tree failed");
5537         } elsif ($format eq 'patch') {
5538                 # For commit ranges, we limit the output to the number of
5539                 # patches specified in the 'patches' feature.
5540                 # For single commits, we limit the output to a single patch,
5541                 # diverging from the git-format-patch default.
5542                 my @commit_spec = ();
5543                 if ($hash_parent) {
5544                         if ($patch_max > 0) {
5545                                 push @commit_spec, "-$patch_max";
5546                         }
5547                         push @commit_spec, '-n', "$hash_parent..$hash";
5548                 } else {
5549                         if ($params{-single}) {
5550                                 push @commit_spec, '-1';
5551                         } else {
5552                                 if ($patch_max > 0) {
5553                                         push @commit_spec, "-$patch_max";
5554                                 }
5555                                 push @commit_spec, "-n";
5556                         }
5557                         push @commit_spec, '--root', $hash;
5558                 }
5559                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5560                         '--stdout', @commit_spec
5561                         or die_error(500, "Open git-format-patch failed");
5562         } else {
5563                 die_error(400, "Unknown commitdiff format");
5564         }
5565
5566         # non-textual hash id's can be cached
5567         my $expires;
5568         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5569                 $expires = "+1d";
5570         }
5571
5572         # write commit message
5573         if ($format eq 'html') {
5574                 my $refs = git_get_references();
5575                 my $ref = format_ref_marker($refs, $co{'id'});
5576
5577                 git_header_html(undef, $expires);
5578                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5579                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5580                 git_print_authorship(\%co);
5581                 print "<div class=\"page_body\">\n";
5582                 if (@{$co{'comment'}} > 1) {
5583                         print "<div class=\"log\">\n";
5584                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5585                         print "</div>\n"; # class="log"
5586                 }
5587
5588         } elsif ($format eq 'plain') {
5589                 my $refs = git_get_references("tags");
5590                 my $tagname = git_get_rev_name_tags($hash);
5591                 my $filename = basename($project) . "-$hash.patch";
5592
5593                 print $cgi->header(
5594                         -type => 'text/plain',
5595                         -charset => 'utf-8',
5596                         -expires => $expires,
5597                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5598                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5599                 print "From: " . to_utf8($co{'author'}) . "\n";
5600                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5601                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5602
5603                 print "X-Git-Tag: $tagname\n" if $tagname;
5604                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5605
5606                 foreach my $line (@{$co{'comment'}}) {
5607                         print to_utf8($line) . "\n";
5608                 }
5609                 print "---\n\n";
5610         } elsif ($format eq 'patch') {
5611                 my $filename = basename($project) . "-$hash.patch";
5612
5613                 print $cgi->header(
5614                         -type => 'text/plain',
5615                         -charset => 'utf-8',
5616                         -expires => $expires,
5617                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5618         }
5619
5620         # write patch
5621         if ($format eq 'html') {
5622                 my $use_parents = !defined $hash_parent ||
5623                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5624                 git_difftree_body(\@difftree, $hash,
5625                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5626                 print "<br/>\n";
5627
5628                 git_patchset_body($fd, \@difftree, $hash,
5629                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5630                 close $fd;
5631                 print "</div>\n"; # class="page_body"
5632                 git_footer_html();
5633
5634         } elsif ($format eq 'plain') {
5635                 local $/ = undef;
5636                 print <$fd>;
5637                 close $fd
5638                         or print "Reading git-diff-tree failed\n";
5639         } elsif ($format eq 'patch') {
5640                 local $/ = undef;
5641                 print <$fd>;
5642                 close $fd
5643                         or print "Reading git-format-patch failed\n";
5644         }
5645 }
5646
5647 sub git_commitdiff_plain {
5648         git_commitdiff(-format => 'plain');
5649 }
5650
5651 # format-patch-style patches
5652 sub git_patch {
5653         git_commitdiff(-format => 'patch', -single=> 1);
5654 }
5655
5656 sub git_patches {
5657         git_commitdiff(-format => 'patch');
5658 }
5659
5660 sub git_history {
5661         if (!defined $hash_base) {
5662                 $hash_base = git_get_head_hash($project);
5663         }
5664         if (!defined $page) {
5665                 $page = 0;
5666         }
5667         my $ftype;
5668         my %co = parse_commit($hash_base)
5669             or die_error(404, "Unknown commit object");
5670
5671         my $refs = git_get_references();
5672         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5673
5674         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5675                                        $file_name, "--full-history")
5676             or die_error(404, "No such file or directory on given branch");
5677
5678         if (!defined $hash && defined $file_name) {
5679                 # some commits could have deleted file in question,
5680                 # and not have it in tree, but one of them has to have it
5681                 for (my $i = 0; $i <= @commitlist; $i++) {
5682                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5683                         last if defined $hash;
5684                 }
5685         }
5686         if (defined $hash) {
5687                 $ftype = git_get_type($hash);
5688         }
5689         if (!defined $ftype) {
5690                 die_error(500, "Unknown type of object");
5691         }
5692
5693         my $paging_nav = '';
5694         if ($page > 0) {
5695                 $paging_nav .=
5696                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5697                                                file_name=>$file_name)},
5698                                 "first");
5699                 $paging_nav .= " &sdot; " .
5700                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5701                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5702         } else {
5703                 $paging_nav .= "first";
5704                 $paging_nav .= " &sdot; prev";
5705         }
5706         my $next_link = '';
5707         if ($#commitlist >= 100) {
5708                 $next_link =
5709                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5710                                  -accesskey => "n", -title => "Alt-n"}, "next");
5711                 $paging_nav .= " &sdot; $next_link";
5712         } else {
5713                 $paging_nav .= " &sdot; next";
5714         }
5715
5716         git_header_html();
5717         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5718         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5719         git_print_page_path($file_name, $ftype, $hash_base);
5720
5721         git_history_body(\@commitlist, 0, 99,
5722                          $refs, $hash_base, $ftype, $next_link);
5723
5724         git_footer_html();
5725 }
5726
5727 sub git_search {
5728         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5729         if (!defined $searchtext) {
5730                 die_error(400, "Text field is empty");
5731         }
5732         if (!defined $hash) {
5733                 $hash = git_get_head_hash($project);
5734         }
5735         my %co = parse_commit($hash);
5736         if (!%co) {
5737                 die_error(404, "Unknown commit object");
5738         }
5739         if (!defined $page) {
5740                 $page = 0;
5741         }
5742
5743         $searchtype ||= 'commit';
5744         if ($searchtype eq 'pickaxe') {
5745                 # pickaxe may take all resources of your box and run for several minutes
5746                 # with every query - so decide by yourself how public you make this feature
5747                 gitweb_check_feature('pickaxe')
5748                     or die_error(403, "Pickaxe is disabled");
5749         }
5750         if ($searchtype eq 'grep') {
5751                 gitweb_check_feature('grep')
5752                     or die_error(403, "Grep is disabled");
5753         }
5754
5755         git_header_html();
5756
5757         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5758                 my $greptype;
5759                 if ($searchtype eq 'commit') {
5760                         $greptype = "--grep=";
5761                 } elsif ($searchtype eq 'author') {
5762                         $greptype = "--author=";
5763                 } elsif ($searchtype eq 'committer') {
5764                         $greptype = "--committer=";
5765                 }
5766                 $greptype .= $searchtext;
5767                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5768                                                $greptype, '--regexp-ignore-case',
5769                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5770
5771                 my $paging_nav = '';
5772                 if ($page > 0) {
5773                         $paging_nav .=
5774                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5775                                                        searchtext=>$searchtext,
5776                                                        searchtype=>$searchtype)},
5777                                         "first");
5778                         $paging_nav .= " &sdot; " .
5779                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5780                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5781                 } else {
5782                         $paging_nav .= "first";
5783                         $paging_nav .= " &sdot; prev";
5784                 }
5785                 my $next_link = '';
5786                 if ($#commitlist >= 100) {
5787                         $next_link =
5788                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5789                                          -accesskey => "n", -title => "Alt-n"}, "next");
5790                         $paging_nav .= " &sdot; $next_link";
5791                 } else {
5792                         $paging_nav .= " &sdot; next";
5793                 }
5794
5795                 if ($#commitlist >= 100) {
5796                 }
5797
5798                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5799                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5800                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5801         }
5802
5803         if ($searchtype eq 'pickaxe') {
5804                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5805                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5806
5807                 print "<table class=\"pickaxe search\">\n";
5808                 my $alternate = 1;
5809                 $/ = "\n";
5810                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5811                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5812                         ($search_use_regexp ? '--pickaxe-regex' : ());
5813                 undef %co;
5814                 my @files;
5815                 while (my $line = <$fd>) {
5816                         chomp $line;
5817                         next unless $line;
5818
5819                         my %set = parse_difftree_raw_line($line);
5820                         if (defined $set{'commit'}) {
5821                                 # finish previous commit
5822                                 if (%co) {
5823                                         print "</td>\n" .
5824                                               "<td class=\"link\">" .
5825                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5826                                               " | " .
5827                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5828                                         print "</td>\n" .
5829                                               "</tr>\n";
5830                                 }
5831
5832                                 if ($alternate) {
5833                                         print "<tr class=\"dark\">\n";
5834                                 } else {
5835                                         print "<tr class=\"light\">\n";
5836                                 }
5837                                 $alternate ^= 1;
5838                                 %co = parse_commit($set{'commit'});
5839                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5840                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5841                                       "<td><i>$author</i></td>\n" .
5842                                       "<td>" .
5843                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5844                                               -class => "list subject"},
5845                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5846                         } elsif (defined $set{'to_id'}) {
5847                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5848
5849                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5850                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5851                                               -class => "list"},
5852                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5853                                       "<br/>\n";
5854                         }
5855                 }
5856                 close $fd;
5857
5858                 # finish last commit (warning: repetition!)
5859                 if (%co) {
5860                         print "</td>\n" .
5861                               "<td class=\"link\">" .
5862                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5863                               " | " .
5864                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5865                         print "</td>\n" .
5866                               "</tr>\n";
5867                 }
5868
5869                 print "</table>\n";
5870         }
5871
5872         if ($searchtype eq 'grep') {
5873                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5874                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5875
5876                 print "<table class=\"grep_search\">\n";
5877                 my $alternate = 1;
5878                 my $matches = 0;
5879                 $/ = "\n";
5880                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5881                         $search_use_regexp ? ('-E', '-i') : '-F',
5882                         $searchtext, $co{'tree'};
5883                 my $lastfile = '';
5884                 while (my $line = <$fd>) {
5885                         chomp $line;
5886                         my ($file, $lno, $ltext, $binary);
5887                         last if ($matches++ > 1000);
5888                         if ($line =~ /^Binary file (.+) matches$/) {
5889                                 $file = $1;
5890                                 $binary = 1;
5891                         } else {
5892                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5893                         }
5894                         if ($file ne $lastfile) {
5895                                 $lastfile and print "</td></tr>\n";
5896                                 if ($alternate++) {
5897                                         print "<tr class=\"dark\">\n";
5898                                 } else {
5899                                         print "<tr class=\"light\">\n";
5900                                 }
5901                                 print "<td class=\"list\">".
5902                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5903                                                                file_name=>"$file"),
5904                                                 -class => "list"}, esc_path($file));
5905                                 print "</td><td>\n";
5906                                 $lastfile = $file;
5907                         }
5908                         if ($binary) {
5909                                 print "<div class=\"binary\">Binary file</div>\n";
5910                         } else {
5911                                 $ltext = untabify($ltext);
5912                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5913                                         $ltext = esc_html($1, -nbsp=>1);
5914                                         $ltext .= '<span class="match">';
5915                                         $ltext .= esc_html($2, -nbsp=>1);
5916                                         $ltext .= '</span>';
5917                                         $ltext .= esc_html($3, -nbsp=>1);
5918                                 } else {
5919                                         $ltext = esc_html($ltext, -nbsp=>1);
5920                                 }
5921                                 print "<div class=\"pre\">" .
5922                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5923                                                                file_name=>"$file").'#l'.$lno,
5924                                                 -class => "linenr"}, sprintf('%4i', $lno))
5925                                         . ' ' .  $ltext . "</div>\n";
5926                         }
5927                 }
5928                 if ($lastfile) {
5929                         print "</td></tr>\n";
5930                         if ($matches > 1000) {
5931                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5932                         }
5933                 } else {
5934                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5935                 }
5936                 close $fd;
5937
5938                 print "</table>\n";
5939         }
5940         git_footer_html();
5941 }
5942
5943 sub git_search_help {
5944         git_header_html();
5945         git_print_page_nav('','', $hash,$hash,$hash);
5946         print <<EOT;
5947 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5948 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5949 the pattern entered is recognized as the POSIX extended
5950 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5951 insensitive).</p>
5952 <dl>
5953 <dt><b>commit</b></dt>
5954 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5955 EOT
5956         my $have_grep = gitweb_check_feature('grep');
5957         if ($have_grep) {
5958                 print <<EOT;
5959 <dt><b>grep</b></dt>
5960 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5961     a different one) are searched for the given pattern. On large trees, this search can take
5962 a while and put some strain on the server, so please use it with some consideration. Note that
5963 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5964 case-sensitive.</dd>
5965 EOT
5966         }
5967         print <<EOT;
5968 <dt><b>author</b></dt>
5969 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5970 <dt><b>committer</b></dt>
5971 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5972 EOT
5973         my $have_pickaxe = gitweb_check_feature('pickaxe');
5974         if ($have_pickaxe) {
5975                 print <<EOT;
5976 <dt><b>pickaxe</b></dt>
5977 <dd>All commits that caused the string to appear or disappear from any file (changes that
5978 added, removed or "modified" the string) will be listed. This search can take a while and
5979 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5980 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5981 EOT
5982         }
5983         print "</dl>\n";
5984         git_footer_html();
5985 }
5986
5987 sub git_shortlog {
5988         my $head = git_get_head_hash($project);
5989         if (!defined $hash) {
5990                 $hash = $head;
5991         }
5992         if (!defined $page) {
5993                 $page = 0;
5994         }
5995         my $refs = git_get_references();
5996
5997         my $commit_hash = $hash;
5998         if (defined $hash_parent) {
5999                 $commit_hash = "$hash_parent..$hash";
6000         }
6001         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6002
6003         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6004         my $next_link = '';
6005         if ($#commitlist >= 100) {
6006                 $next_link =
6007                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6008                                  -accesskey => "n", -title => "Alt-n"}, "next");
6009         }
6010         my $patch_max = gitweb_check_feature('patches');
6011         if ($patch_max) {
6012                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6013                         $paging_nav .= " &sdot; " .
6014                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6015                                         "patches");
6016                 }
6017         }
6018
6019         git_header_html();
6020         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6021         git_print_header_div('summary', $project);
6022
6023         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6024
6025         git_footer_html();
6026 }
6027
6028 ## ......................................................................
6029 ## feeds (RSS, Atom; OPML)
6030
6031 sub git_feed {
6032         my $format = shift || 'atom';
6033         my $have_blame = gitweb_check_feature('blame');
6034
6035         # Atom: http://www.atomenabled.org/developers/syndication/
6036         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6037         if ($format ne 'rss' && $format ne 'atom') {
6038                 die_error(400, "Unknown web feed format");
6039         }
6040
6041         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6042         my $head = $hash || 'HEAD';
6043         my @commitlist = parse_commits($head, 150, 0, $file_name);
6044
6045         my %latest_commit;
6046         my %latest_date;
6047         my $content_type = "application/$format+xml";
6048         if (defined $cgi->http('HTTP_ACCEPT') &&
6049                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6050                 # browser (feed reader) prefers text/xml
6051                 $content_type = 'text/xml';
6052         }
6053         if (defined($commitlist[0])) {
6054                 %latest_commit = %{$commitlist[0]};
6055                 my $latest_epoch = $latest_commit{'committer_epoch'};
6056                 %latest_date   = parse_date($latest_epoch);
6057                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6058                 if (defined $if_modified) {
6059                         my $since;
6060                         if (eval { require HTTP::Date; 1; }) {
6061                                 $since = HTTP::Date::str2time($if_modified);
6062                         } elsif (eval { require Time::ParseDate; 1; }) {
6063                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6064                         }
6065                         if (defined $since && $latest_epoch <= $since) {
6066                                 print $cgi->header(
6067                                         -type => $content_type,
6068                                         -charset => 'utf-8',
6069                                         -last_modified => $latest_date{'rfc2822'},
6070                                         -status => '304 Not Modified');
6071                                 return;
6072                         }
6073                 }
6074                 print $cgi->header(
6075                         -type => $content_type,
6076                         -charset => 'utf-8',
6077                         -last_modified => $latest_date{'rfc2822'});
6078         } else {
6079                 print $cgi->header(
6080                         -type => $content_type,
6081                         -charset => 'utf-8');
6082         }
6083
6084         # Optimization: skip generating the body if client asks only
6085         # for Last-Modified date.
6086         return if ($cgi->request_method() eq 'HEAD');
6087
6088         # header variables
6089         my $title = "$site_name - $project/$action";
6090         my $feed_type = 'log';
6091         if (defined $hash) {
6092                 $title .= " - '$hash'";
6093                 $feed_type = 'branch log';
6094                 if (defined $file_name) {
6095                         $title .= " :: $file_name";
6096                         $feed_type = 'history';
6097                 }
6098         } elsif (defined $file_name) {
6099                 $title .= " - $file_name";
6100                 $feed_type = 'history';
6101         }
6102         $title .= " $feed_type";
6103         my $descr = git_get_project_description($project);
6104         if (defined $descr) {
6105                 $descr = esc_html($descr);
6106         } else {
6107                 $descr = "$project " .
6108                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6109                          " feed";
6110         }
6111         my $owner = git_get_project_owner($project);
6112         $owner = esc_html($owner);
6113
6114         #header
6115         my $alt_url;
6116         if (defined $file_name) {
6117                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6118         } elsif (defined $hash) {
6119                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6120         } else {
6121                 $alt_url = href(-full=>1, action=>"summary");
6122         }
6123         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6124         if ($format eq 'rss') {
6125                 print <<XML;
6126 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6127 <channel>
6128 XML
6129                 print "<title>$title</title>\n" .
6130                       "<link>$alt_url</link>\n" .
6131                       "<description>$descr</description>\n" .
6132                       "<language>en</language>\n" .
6133                       # project owner is responsible for 'editorial' content
6134                       "<managingEditor>$owner</managingEditor>\n";
6135                 if (defined $logo || defined $favicon) {
6136                         # prefer the logo to the favicon, since RSS
6137                         # doesn't allow both
6138                         my $img = esc_url($logo || $favicon);
6139                         print "<image>\n" .
6140                               "<url>$img</url>\n" .
6141                               "<title>$title</title>\n" .
6142                               "<link>$alt_url</link>\n" .
6143                               "</image>\n";
6144                 }
6145                 if (%latest_date) {
6146                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6147                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6148                 }
6149                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6150         } elsif ($format eq 'atom') {
6151                 print <<XML;
6152 <feed xmlns="http://www.w3.org/2005/Atom">
6153 XML
6154                 print "<title>$title</title>\n" .
6155                       "<subtitle>$descr</subtitle>\n" .
6156                       '<link rel="alternate" type="text/html" href="' .
6157                       $alt_url . '" />' . "\n" .
6158                       '<link rel="self" type="' . $content_type . '" href="' .
6159                       $cgi->self_url() . '" />' . "\n" .
6160                       "<id>" . href(-full=>1) . "</id>\n" .
6161                       # use project owner for feed author
6162                       "<author><name>$owner</name></author>\n";
6163                 if (defined $favicon) {
6164                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6165                 }
6166                 if (defined $logo_url) {
6167                         # not twice as wide as tall: 72 x 27 pixels
6168                         print "<logo>" . esc_url($logo) . "</logo>\n";
6169                 }
6170                 if (! %latest_date) {
6171                         # dummy date to keep the feed valid until commits trickle in:
6172                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6173                 } else {
6174                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6175                 }
6176                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6177         }
6178
6179         # contents
6180         for (my $i = 0; $i <= $#commitlist; $i++) {
6181                 my %co = %{$commitlist[$i]};
6182                 my $commit = $co{'id'};
6183                 # we read 150, we always show 30 and the ones more recent than 48 hours
6184                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6185                         last;
6186                 }
6187                 my %cd = parse_date($co{'author_epoch'});
6188
6189                 # get list of changed files
6190                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6191                         $co{'parent'} || "--root",
6192                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6193                         or next;
6194                 my @difftree = map { chomp; $_ } <$fd>;
6195                 close $fd
6196                         or next;
6197
6198                 # print element (entry, item)
6199                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6200                 if ($format eq 'rss') {
6201                         print "<item>\n" .
6202                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6203                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6204                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6205                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6206                               "<link>$co_url</link>\n" .
6207                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6208                               "<content:encoded>" .
6209                               "<![CDATA[\n";
6210                 } elsif ($format eq 'atom') {
6211                         print "<entry>\n" .
6212                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6213                               "<updated>$cd{'iso-8601'}</updated>\n" .
6214                               "<author>\n" .
6215                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6216                         if ($co{'author_email'}) {
6217                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6218                         }
6219                         print "</author>\n" .
6220                               # use committer for contributor
6221                               "<contributor>\n" .
6222                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6223                         if ($co{'committer_email'}) {
6224                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6225                         }
6226                         print "</contributor>\n" .
6227                               "<published>$cd{'iso-8601'}</published>\n" .
6228                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6229                               "<id>$co_url</id>\n" .
6230                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6231                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6232                 }
6233                 my $comment = $co{'comment'};
6234                 print "<pre>\n";
6235                 foreach my $line (@$comment) {
6236                         $line = esc_html($line);
6237                         print "$line\n";
6238                 }
6239                 print "</pre><ul>\n";
6240                 foreach my $difftree_line (@difftree) {
6241                         my %difftree = parse_difftree_raw_line($difftree_line);
6242                         next if !$difftree{'from_id'};
6243
6244                         my $file = $difftree{'file'} || $difftree{'to_file'};
6245
6246                         print "<li>" .
6247                               "[" .
6248                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6249                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6250                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6251                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6252                                       -title => "diff"}, 'D');
6253                         if ($have_blame) {
6254                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6255                                                              file_name=>$file, hash_base=>$commit),
6256                                               -title => "blame"}, 'B');
6257                         }
6258                         # if this is not a feed of a file history
6259                         if (!defined $file_name || $file_name ne $file) {
6260                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6261                                                              file_name=>$file, hash=>$commit),
6262                                               -title => "history"}, 'H');
6263                         }
6264                         $file = esc_path($file);
6265                         print "] ".
6266                               "$file</li>\n";
6267                 }
6268                 if ($format eq 'rss') {
6269                         print "</ul>]]>\n" .
6270                               "</content:encoded>\n" .
6271                               "</item>\n";
6272                 } elsif ($format eq 'atom') {
6273                         print "</ul>\n</div>\n" .
6274                               "</content>\n" .
6275                               "</entry>\n";
6276                 }
6277         }
6278
6279         # end of feed
6280         if ($format eq 'rss') {
6281                 print "</channel>\n</rss>\n";
6282         }       elsif ($format eq 'atom') {
6283                 print "</feed>\n";
6284         }
6285 }
6286
6287 sub git_rss {
6288         git_feed('rss');
6289 }
6290
6291 sub git_atom {
6292         git_feed('atom');
6293 }
6294
6295 sub git_opml {
6296         my @list = git_get_projects_list();
6297
6298         print $cgi->header(
6299                 -type => 'text/xml',
6300                 -charset => 'utf-8',
6301                 -content_disposition => 'inline; filename="opml.xml"');
6302
6303         print <<XML;
6304 <?xml version="1.0" encoding="utf-8"?>
6305 <opml version="1.0">
6306 <head>
6307   <title>$site_name OPML Export</title>
6308 </head>
6309 <body>
6310 <outline text="git RSS feeds">
6311 XML
6312
6313         foreach my $pr (@list) {
6314                 my %proj = %$pr;
6315                 my $head = git_get_head_hash($proj{'path'});
6316                 if (!defined $head) {
6317                         next;
6318                 }
6319                 $git_dir = "$projectroot/$proj{'path'}";
6320                 my %co = parse_commit($head);
6321                 if (!%co) {
6322                         next;
6323                 }
6324
6325                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6326                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6327                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6328                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6329         }
6330         print <<XML;
6331 </outline>
6332 </body>
6333 </opml>
6334 XML
6335 }