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 set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99 # URI of gitweb.js (JavaScript code for gitweb)
 100 our $javascript = "++GITWEB_JS++";
 101
 102 # URI and label (title) of GIT logo link
 103 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 104 #our $logo_label = "git documentation";
 105 our $logo_url = "http://git-scm.com/";
 106 our $logo_label = "git homepage";
 107
 108 # source of projects list
 109 our $projects_list = "++GITWEB_LIST++";
 110
 111 # the width (in characters) of the projects list "Description" column
 112 our $projects_list_description_width = 25;
 113
 114 # default order of projects list
 115 # valid values are none, project, descr, owner, and age
 116 our $default_projects_order = "project";
 117
 118 # show repository only if this file exists
 119 # (only effective if this variable evaluates to true)
 120 our $export_ok = "++GITWEB_EXPORT_OK++";
 121
 122 # show repository only if this subroutine returns true
 123 # when given the path to the project, for example:
 124 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 125 our $export_auth_hook = undef;
 126
 127 # only allow viewing of repositories also shown on the overview page
 128 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 129
 130 # list of git base URLs used for URL to where fetch project from,
 131 # i.e. full URL is "$git_base_url/$project"
 132 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 133
 134 # default blob_plain mimetype and default charset for text/plain blob
 135 our $default_blob_plain_mimetype = 'text/plain';
 136 our $default_text_plain_charset  = undef;
 137
 138 # file to use for guessing MIME types before trying /etc/mime.types
 139 # (relative to the current git repository)
 140 our $mimetypes_file = undef;
 141
 142 # assume this charset if line contains non-UTF-8 characters;
 143 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 144 # for which encoding all byte sequences are valid, for example
 145 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 146 # could be even 'utf-8' for the old behavior)
 147 our $fallback_encoding = 'latin1';
 148
 149 # rename detection options for git-diff and git-diff-tree
 150 # - default is '-M', with the cost proportional to
 151 #   (number of removed files) * (number of new files).
 152 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 153 #   (number of changed files + number of removed files) * (number of new files)
 154 # - even more costly is '-C', '--find-copies-harder' with cost
 155 #   (number of files in the original tree) * (number of new files)
 156 # - one might want to include '-B' option, e.g. '-B', '-M'
 157 our @diff_opts = ('-M'); # taken from git_commit
 158
 159 # Disables features that would allow repository owners to inject script into
 160 # the gitweb domain.
 161 our $prevent_xss = 0;
 162
 163 # information about snapshot formats that gitweb is capable of serving
 164 our %known_snapshot_formats = (
 165         # name => {
 166         #       'display' => display name,
 167         #       'type' => mime type,
 168         #       'suffix' => filename suffix,
 169         #       'format' => --format for git-archive,
 170         #       'compressor' => [compressor command and arguments]
 171         #                       (array reference, optional)
 172         #       'disabled' => boolean (optional)}
 173         #
 174         'tgz' => {
 175                 'display' => 'tar.gz',
 176                 'type' => 'application/x-gzip',
 177                 'suffix' => '.tar.gz',
 178                 'format' => 'tar',
 179                 'compressor' => ['gzip']},
 180
 181         'tbz2' => {
 182                 'display' => 'tar.bz2',
 183                 'type' => 'application/x-bzip2',
 184                 'suffix' => '.tar.bz2',
 185                 'format' => 'tar',
 186                 'compressor' => ['bzip2']},
 187
 188         'txz' => {
 189                 'display' => 'tar.xz',
 190                 'type' => 'application/x-xz',
 191                 'suffix' => '.tar.xz',
 192                 'format' => 'tar',
 193                 'compressor' => ['xz'],
 194                 'disabled' => 1},
 195
 196         'zip' => {
 197                 'display' => 'zip',
 198                 'type' => 'application/x-zip',
 199                 'suffix' => '.zip',
 200                 'format' => 'zip'},
 201 );
 202
 203 # Aliases so we understand old gitweb.snapshot values in repository
 204 # configuration.
 205 our %known_snapshot_format_aliases = (
 206         'gzip'  => 'tgz',
 207         'bzip2' => 'tbz2',
 208         'xz'    => 'txz',
 209
 210         # backward compatibility: legacy gitweb config support
 211         'x-gzip' => undef, 'gz' => undef,
 212         'x-bzip2' => undef, 'bz2' => undef,
 213         'x-zip' => undef, '' => undef,
 214 );
 215
 216 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 217 # are changed, it may be appropriate to change these values too via
 218 # $GITWEB_CONFIG.
 219 our %avatar_size = (
 220         'default' => 16,
 221         'double'  => 32
 222 );
 223
 224 # Used to set the maximum load that we will still respond to gitweb queries.
 225 # If server load exceed this value then return "503 server busy" error.
 226 # If gitweb cannot determined server load, it is taken to be 0.
 227 # Leave it undefined (or set to 'undef') to turn off load checking.
 228 our $maxload = 300;
 229
 230 # You define site-wide feature defaults here; override them with
 231 # $GITWEB_CONFIG as necessary.
 232 our %feature = (
 233         # feature => {
 234         #       'sub' => feature-sub (subroutine),
 235         #       'override' => allow-override (boolean),
 236         #       'default' => [ default options...] (array reference)}
 237         #
 238         # if feature is overridable (it means that allow-override has true value),
 239         # then feature-sub will be called with default options as parameters;
 240         # return value of feature-sub indicates if to enable specified feature
 241         #
 242         # if there is no 'sub' key (no feature-sub), then feature cannot be
 243         # overriden
 244         #
 245         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 246         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 247         # is enabled
 248
 249         # Enable the 'blame' blob view, showing the last commit that modified
 250         # each line in the file. This can be very CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'blame'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'blame'}{'override'} = 1;
 256         # and in project config gitweb.blame = 0|1;
 257         'blame' => {
 258                 'sub' => sub { feature_bool('blame', @_) },
 259                 'override' => 0,
 260                 'default' => [0]},
 261
 262         # Enable the 'snapshot' link, providing a compressed archive of any
 263         # tree. This can potentially generate high traffic if you have large
 264         # project.
 265
 266         # Value is a list of formats defined in %known_snapshot_formats that
 267         # you wish to offer.
 268         # To disable system wide have in $GITWEB_CONFIG
 269         # $feature{'snapshot'}{'default'} = [];
 270         # To have project specific config enable override in $GITWEB_CONFIG
 271         # $feature{'snapshot'}{'override'} = 1;
 272         # and in project config, a comma-separated list of formats or "none"
 273         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 274         'snapshot' => {
 275                 'sub' => \&feature_snapshot,
 276                 'override' => 0,
 277                 'default' => ['tgz']},
 278
 279         # Enable text search, which will list the commits which match author,
 280         # committer or commit text to a given string.  Enabled by default.
 281         # Project specific override is not supported.
 282         'search' => {
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable grep search, which will list the files in currently selected
 287         # tree containing the given string. Enabled by default. This can be
 288         # potentially CPU-intensive, of course.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'grep'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'grep'}{'override'} = 1;
 294         # and in project config gitweb.grep = 0|1;
 295         'grep' => {
 296                 'sub' => sub { feature_bool('grep', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable the pickaxe search, which will list the commits that modified
 301         # a given string in a file. This can be practical and quite faster
 302         # alternative to 'blame', but still potentially CPU-intensive.
 303
 304         # To enable system wide have in $GITWEB_CONFIG
 305         # $feature{'pickaxe'}{'default'} = [1];
 306         # To have project specific config enable override in $GITWEB_CONFIG
 307         # $feature{'pickaxe'}{'override'} = 1;
 308         # and in project config gitweb.pickaxe = 0|1;
 309         'pickaxe' => {
 310                 'sub' => sub { feature_bool('pickaxe', @_) },
 311                 'override' => 0,
 312                 'default' => [1]},
 313
 314         # Enable showing size of blobs in a 'tree' view, in a separate
 315         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 316
 317         # To disable system wide have in $GITWEB_CONFIG
 318         # $feature{'show-sizes'}{'default'} = [0];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'show-sizes'}{'override'} = 1;
 321         # and in project config gitweb.showsizes = 0|1;
 322         'show-sizes' => {
 323                 'sub' => sub { feature_bool('showsizes', @_) },
 324                 'override' => 0,
 325                 'default' => [1]},
 326
 327         # Make gitweb use an alternative format of the URLs which can be
 328         # more readable and natural-looking: project name is embedded
 329         # directly in the path and the query string contains other
 330         # auxiliary information. All gitweb installations recognize
 331         # URL in either format; this configures in which formats gitweb
 332         # generates links.
 333
 334         # To enable system wide have in $GITWEB_CONFIG
 335         # $feature{'pathinfo'}{'default'} = [1];
 336         # Project specific override is not supported.
 337
 338         # Note that you will need to change the default location of CSS,
 339         # favicon, logo and possibly other files to an absolute URL. Also,
 340         # if gitweb.cgi serves as your indexfile, you will need to force
 341         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 342         'pathinfo' => {
 343                 'override' => 0,
 344                 'default' => [0]},
 345
 346         # Make gitweb consider projects in project root subdirectories
 347         # to be forks of existing projects. Given project $projname.git,
 348         # projects matching $projname/*.git will not be shown in the main
 349         # projects list, instead a '+' mark will be added to $projname
 350         # there and a 'forks' view will be enabled for the project, listing
 351         # all the forks. If project list is taken from a file, forks have
 352         # to be listed after the main project.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'forks'}{'default'} = [1];
 356         # Project specific override is not supported.
 357         'forks' => {
 358                 'override' => 0,
 359                 'default' => [0]},
 360
 361         # Insert custom links to the action bar of all project pages.
 362         # This enables you mainly to link to third-party scripts integrating
 363         # into gitweb; e.g. git-browser for graphical history representation
 364         # or custom web-based repository administration interface.
 365
 366         # The 'default' value consists of a list of triplets in the form
 367         # (label, link, position) where position is the label after which
 368         # to insert the link and link is a format string where %n expands
 369         # to the project name, %f to the project path within the filesystem,
 370         # %h to the current hash (h gitweb parameter) and %b to the current
 371         # hash base (hb gitweb parameter); %% expands to %.
 372
 373         # To enable system wide have in $GITWEB_CONFIG e.g.
 374         # $feature{'actions'}{'default'} = [('graphiclog',
 375         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 376         # Project specific override is not supported.
 377         'actions' => {
 378                 'override' => 0,
 379                 'default' => []},
 380
 381         # Allow gitweb scan project content tags described in ctags/
 382         # of project repository, and display the popular Web 2.0-ish
 383         # "tag cloud" near the project list. Note that this is something
 384         # COMPLETELY different from the normal Git tags.
 385
 386         # gitweb by itself can show existing tags, but it does not handle
 387         # tagging itself; you need an external application for that.
 388         # For an example script, check Girocco's cgi/tagproj.cgi.
 389         # You may want to install the HTML::TagCloud Perl module to get
 390         # a pretty tag cloud instead of just a list of tags.
 391
 392         # To enable system wide have in $GITWEB_CONFIG
 393         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 394         # Project specific override is not supported.
 395         'ctags' => {
 396                 'override' => 0,
 397                 'default' => [0]},
 398
 399         # The maximum number of patches in a patchset generated in patch
 400         # view. Set this to 0 or undef to disable patch view, or to a
 401         # negative number to remove any limit.
 402
 403         # To disable system wide have in $GITWEB_CONFIG
 404         # $feature{'patches'}{'default'} = [0];
 405         # To have project specific config enable override in $GITWEB_CONFIG
 406         # $feature{'patches'}{'override'} = 1;
 407         # and in project config gitweb.patches = 0|n;
 408         # where n is the maximum number of patches allowed in a patchset.
 409         'patches' => {
 410                 'sub' => \&feature_patches,
 411                 'override' => 0,
 412                 'default' => [16]},
 413
 414         # Avatar support. When this feature is enabled, views such as
 415         # shortlog or commit will display an avatar associated with
 416         # the email of the committer(s) and/or author(s).
 417
 418         # Currently available providers are gravatar and picon.
 419         # If an unknown provider is specified, the feature is disabled.
 420
 421         # Gravatar depends on Digest::MD5.
 422         # Picon currently relies on the indiana.edu database.
 423
 424         # To enable system wide have in $GITWEB_CONFIG
 425         # $feature{'avatar'}{'default'} = ['<provider>'];
 426         # where <provider> is either gravatar or picon.
 427         # To have project specific config enable override in $GITWEB_CONFIG
 428         # $feature{'avatar'}{'override'} = 1;
 429         # and in project config gitweb.avatar = <provider>;
 430         'avatar' => {
 431                 'sub' => \&feature_avatar,
 432                 'override' => 0,
 433                 'default' => ['']},
 434
 435         # Enable displaying how much time and how many git commands
 436         # it took to generate and display page.  Disabled by default.
 437         # Project specific override is not supported.
 438         'timed' => {
 439                 'override' => 0,
 440                 'default' => [0]},
 441
 442         # Enable turning some links into links to actions which require
 443         # JavaScript to run (like 'blame_incremental').  Not enabled by
 444         # default.  Project specific override is currently not supported.
 445         'javascript-actions' => {
 446                 'override' => 0,
 447                 'default' => [0]},
 448 );
 449
 450 sub gitweb_get_feature {
 451         my ($name) = @_;
 452         return unless exists $feature{$name};
 453         my ($sub, $override, @defaults) = (
 454                 $feature{$name}{'sub'},
 455                 $feature{$name}{'override'},
 456                 @{$feature{$name}{'default'}});
 457         # project specific override is possible only if we have project
 458         our $git_dir; # global variable, declared later
 459         if (!$override || !defined $git_dir) {
 460                 return @defaults;
 461         }
 462         if (!defined $sub) {
 463                 warn "feature $name is not overridable";
 464                 return @defaults;
 465         }
 466         return $sub->(@defaults);
 467 }
 468
 469 # A wrapper to check if a given feature is enabled.
 470 # With this, you can say
 471 #
 472 #   my $bool_feat = gitweb_check_feature('bool_feat');
 473 #   gitweb_check_feature('bool_feat') or somecode;
 474 #
 475 # instead of
 476 #
 477 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 478 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 479 #
 480 sub gitweb_check_feature {
 481         return (gitweb_get_feature(@_))[0];
 482 }
 483
 484
 485 sub feature_bool {
 486         my $key = shift;
 487         my ($val) = git_get_project_config($key, '--bool');
 488
 489         if (!defined $val) {
 490                 return ($_[0]);
 491         } elsif ($val eq 'true') {
 492                 return (1);
 493         } elsif ($val eq 'false') {
 494                 return (0);
 495         }
 496 }
 497
 498 sub feature_snapshot {
 499         my (@fmts) = @_;
 500
 501         my ($val) = git_get_project_config('snapshot');
 502
 503         if ($val) {
 504                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 505         }
 506
 507         return @fmts;
 508 }
 509
 510 sub feature_patches {
 511         my @val = (git_get_project_config('patches', '--int'));
 512
 513         if (@val) {
 514                 return @val;
 515         }
 516
 517         return ($_[0]);
 518 }
 519
 520 sub feature_avatar {
 521         my @val = (git_get_project_config('avatar'));
 522
 523         return @val ? @val : @_;
 524 }
 525
 526 # checking HEAD file with -e is fragile if the repository was
 527 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 528 # and then pruned.
 529 sub check_head_link {
 530         my ($dir) = @_;
 531         my $headfile = "$dir/HEAD";
 532         return ((-e $headfile) ||
 533                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 534 }
 535
 536 sub check_export_ok {
 537         my ($dir) = @_;
 538         return (check_head_link($dir) &&
 539                 (!$export_ok || -e "$dir/$export_ok") &&
 540                 (!$export_auth_hook || $export_auth_hook->($dir)));
 541 }
 542
 543 # process alternate names for backward compatibility
 544 # filter out unsupported (unknown) snapshot formats
 545 sub filter_snapshot_fmts {
 546         my @fmts = @_;
 547
 548         @fmts = map {
 549                 exists $known_snapshot_format_aliases{$_} ?
 550                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 551         @fmts = grep {
 552                 exists $known_snapshot_formats{$_} &&
 553                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 554 }
 555
 556 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 557 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 558 # die if there are errors parsing config file
 559 if (-e $GITWEB_CONFIG) {
 560         do $GITWEB_CONFIG;
 561         die $@ if $@;
 562 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 563         do $GITWEB_CONFIG_SYSTEM;
 564         die $@ if $@;
 565 }
 566
 567 # Get loadavg of system, to compare against $maxload.
 568 # Currently it requires '/proc/loadavg' present to get loadavg;
 569 # if it is not present it returns 0, which means no load checking.
 570 sub get_loadavg {
 571         if( -e '/proc/loadavg' ){
 572                 open my $fd, '<', '/proc/loadavg'
 573                         or return 0;
 574                 my @load = split(/\s+/, scalar <$fd>);
 575                 close $fd;
 576
 577                 # The first three columns measure CPU and IO utilization of the last one,
 578                 # five, and 10 minute periods.  The fourth column shows the number of
 579                 # currently running processes and the total number of processes in the m/n
 580                 # format.  The last column displays the last process ID used.
 581                 return $load[0] || 0;
 582         }
 583         # additional checks for load average should go here for things that don't export
 584         # /proc/loadavg
 585
 586         return 0;
 587 }
 588
 589 # version of the core git binary
 590 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 591 $number_of_git_cmds++;
 592
 593 $projects_list ||= $projectroot;
 594
 595 if (defined $maxload && get_loadavg() > $maxload) {
 596         die_error(503, "The load average on the server is too high");
 597 }
 598
 599 # ======================================================================
 600 # input validation and dispatch
 601
 602 # input parameters can be collected from a variety of sources (presently, CGI
 603 # and PATH_INFO), so we define an %input_params hash that collects them all
 604 # together during validation: this allows subsequent uses (e.g. href()) to be
 605 # agnostic of the parameter origin
 606
 607 our %input_params = ();
 608
 609 # input parameters are stored with the long parameter name as key. This will
 610 # also be used in the href subroutine to convert parameters to their CGI
 611 # equivalent, and since the href() usage is the most frequent one, we store
 612 # the name -> CGI key mapping here, instead of the reverse.
 613 #
 614 # XXX: Warning: If you touch this, check the search form for updating,
 615 # too.
 616
 617 our @cgi_param_mapping = (
 618         project => "p",
 619         action => "a",
 620         file_name => "f",
 621         file_parent => "fp",
 622         hash => "h",
 623         hash_parent => "hp",
 624         hash_base => "hb",
 625         hash_parent_base => "hpb",
 626         page => "pg",
 627         order => "o",
 628         searchtext => "s",
 629         searchtype => "st",
 630         snapshot_format => "sf",
 631         extra_options => "opt",
 632         search_use_regexp => "sr",
 633         # this must be last entry (for manipulation from JavaScript)
 634         javascript => "js"
 635 );
 636 our %cgi_param_mapping = @cgi_param_mapping;
 637
 638 # we will also need to know the possible actions, for validation
 639 our %actions = (
 640         "blame" => \&git_blame,
 641         "blame_incremental" => \&git_blame_incremental,
 642         "blame_data" => \&git_blame_data,
 643         "blobdiff" => \&git_blobdiff,
 644         "blobdiff_plain" => \&git_blobdiff_plain,
 645         "blob" => \&git_blob,
 646         "blob_plain" => \&git_blob_plain,
 647         "commitdiff" => \&git_commitdiff,
 648         "commitdiff_plain" => \&git_commitdiff_plain,
 649         "commit" => \&git_commit,
 650         "forks" => \&git_forks,
 651         "heads" => \&git_heads,
 652         "history" => \&git_history,
 653         "log" => \&git_log,
 654         "patch" => \&git_patch,
 655         "patches" => \&git_patches,
 656         "rss" => \&git_rss,
 657         "atom" => \&git_atom,
 658         "search" => \&git_search,
 659         "search_help" => \&git_search_help,
 660         "shortlog" => \&git_shortlog,
 661         "summary" => \&git_summary,
 662         "tag" => \&git_tag,
 663         "tags" => \&git_tags,
 664         "tree" => \&git_tree,
 665         "snapshot" => \&git_snapshot,
 666         "object" => \&git_object,
 667         # those below don't need $project
 668         "opml" => \&git_opml,
 669         "project_list" => \&git_project_list,
 670         "project_index" => \&git_project_index,
 671 );
 672
 673 # finally, we have the hash of allowed extra_options for the commands that
 674 # allow them
 675 our %allowed_options = (
 676         "--no-merges" => [ qw(rss atom log shortlog history) ],
 677 );
 678
 679 # fill %input_params with the CGI parameters. All values except for 'opt'
 680 # should be single values, but opt can be an array. We should probably
 681 # build an array of parameters that can be multi-valued, but since for the time
 682 # being it's only this one, we just single it out
 683 while (my ($name, $symbol) = each %cgi_param_mapping) {
 684         if ($symbol eq 'opt') {
 685                 $input_params{$name} = [ $cgi->param($symbol) ];
 686         } else {
 687                 $input_params{$name} = $cgi->param($symbol);
 688         }
 689 }
 690
 691 # now read PATH_INFO and update the parameter list for missing parameters
 692 sub evaluate_path_info {
 693         return if defined $input_params{'project'};
 694         return if !$path_info;
 695         $path_info =~ s,^/+,,;
 696         return if !$path_info;
 697
 698         # find which part of PATH_INFO is project
 699         my $project = $path_info;
 700         $project =~ s,/+$,,;
 701         while ($project && !check_head_link("$projectroot/$project")) {
 702                 $project =~ s,/*[^/]*$,,;
 703         }
 704         return unless $project;
 705         $input_params{'project'} = $project;
 706
 707         # do not change any parameters if an action is given using the query string
 708         return if $input_params{'action'};
 709         $path_info =~ s,^\Q$project\E/*,,;
 710
 711         # next, check if we have an action
 712         my $action = $path_info;
 713         $action =~ s,/.*$,,;
 714         if (exists $actions{$action}) {
 715                 $path_info =~ s,^$action/*,,;
 716                 $input_params{'action'} = $action;
 717         }
 718
 719         # list of actions that want hash_base instead of hash, but can have no
 720         # pathname (f) parameter
 721         my @wants_base = (
 722                 'tree',
 723                 'history',
 724         );
 725
 726         # we want to catch
 727         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 728         my ($parentrefname, $parentpathname, $refname, $pathname) =
 729                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 730
 731         # first, analyze the 'current' part
 732         if (defined $pathname) {
 733                 # we got "branch:filename" or "branch:dir/"
 734                 # we could use git_get_type(branch:pathname), but:
 735                 # - it needs $git_dir
 736                 # - it does a git() call
 737                 # - the convention of terminating directories with a slash
 738                 #   makes it superfluous
 739                 # - embedding the action in the PATH_INFO would make it even
 740                 #   more superfluous
 741                 $pathname =~ s,^/+,,;
 742                 if (!$pathname || substr($pathname, -1) eq "/") {
 743                         $input_params{'action'} ||= "tree";
 744                         $pathname =~ s,/$,,;
 745                 } else {
 746                         # the default action depends on whether we had parent info
 747                         # or not
 748                         if ($parentrefname) {
 749                                 $input_params{'action'} ||= "blobdiff_plain";
 750                         } else {
 751                                 $input_params{'action'} ||= "blob_plain";
 752                         }
 753                 }
 754                 $input_params{'hash_base'} ||= $refname;
 755                 $input_params{'file_name'} ||= $pathname;
 756         } elsif (defined $refname) {
 757                 # we got "branch". In this case we have to choose if we have to
 758                 # set hash or hash_base.
 759                 #
 760                 # Most of the actions without a pathname only want hash to be
 761                 # set, except for the ones specified in @wants_base that want
 762                 # hash_base instead. It should also be noted that hand-crafted
 763                 # links having 'history' as an action and no pathname or hash
 764                 # set will fail, but that happens regardless of PATH_INFO.
 765                 $input_params{'action'} ||= "shortlog";
 766                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 767                         $input_params{'hash_base'} ||= $refname;
 768                 } else {
 769                         $input_params{'hash'} ||= $refname;
 770                 }
 771         }
 772
 773         # next, handle the 'parent' part, if present
 774         if (defined $parentrefname) {
 775                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 776                 # someproject/blobdiff/oldrev..newrev:/filename
 777                 if ($parentpathname) {
 778                         $parentpathname =~ s,^/+,,;
 779                         $parentpathname =~ s,/$,,;
 780                         $input_params{'file_parent'} ||= $parentpathname;
 781                 } else {
 782                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 783                 }
 784                 # we assume that hash_parent_base is wanted if a path was specified,
 785                 # or if the action wants hash_base instead of hash
 786                 if (defined $input_params{'file_parent'} ||
 787                         grep { $_ eq $input_params{'action'} } @wants_base) {
 788                         $input_params{'hash_parent_base'} ||= $parentrefname;
 789                 } else {
 790                         $input_params{'hash_parent'} ||= $parentrefname;
 791                 }
 792         }
 793
 794         # for the snapshot action, we allow URLs in the form
 795         # $project/snapshot/$hash.ext
 796         # where .ext determines the snapshot and gets removed from the
 797         # passed $refname to provide the $hash.
 798         #
 799         # To be able to tell that $refname includes the format extension, we
 800         # require the following two conditions to be satisfied:
 801         # - the hash input parameter MUST have been set from the $refname part
 802         #   of the URL (i.e. they must be equal)
 803         # - the snapshot format MUST NOT have been defined already (e.g. from
 804         #   CGI parameter sf)
 805         # It's also useless to try any matching unless $refname has a dot,
 806         # so we check for that too
 807         if (defined $input_params{'action'} &&
 808                 $input_params{'action'} eq 'snapshot' &&
 809                 defined $refname && index($refname, '.') != -1 &&
 810                 $refname eq $input_params{'hash'} &&
 811                 !defined $input_params{'snapshot_format'}) {
 812                 # We loop over the known snapshot formats, checking for
 813                 # extensions. Allowed extensions are both the defined suffix
 814                 # (which includes the initial dot already) and the snapshot
 815                 # format key itself, with a prepended dot
 816                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 817                         my $hash = $refname;
 818                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 819                                 next;
 820                         }
 821                         my $sfx = $1;
 822                         # a valid suffix was found, so set the snapshot format
 823                         # and reset the hash parameter
 824                         $input_params{'snapshot_format'} = $fmt;
 825                         $input_params{'hash'} = $hash;
 826                         # we also set the format suffix to the one requested
 827                         # in the URL: this way a request for e.g. .tgz returns
 828                         # a .tgz instead of a .tar.gz
 829                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 830                         last;
 831                 }
 832         }
 833 }
 834 evaluate_path_info();
 835
 836 our $action = $input_params{'action'};
 837 if (defined $action) {
 838         if (!validate_action($action)) {
 839                 die_error(400, "Invalid action parameter");
 840         }
 841 }
 842
 843 # parameters which are pathnames
 844 our $project = $input_params{'project'};
 845 if (defined $project) {
 846         if (!validate_project($project)) {
 847                 undef $project;
 848                 die_error(404, "No such project");
 849         }
 850 }
 851
 852 our $file_name = $input_params{'file_name'};
 853 if (defined $file_name) {
 854         if (!validate_pathname($file_name)) {
 855                 die_error(400, "Invalid file parameter");
 856         }
 857 }
 858
 859 our $file_parent = $input_params{'file_parent'};
 860 if (defined $file_parent) {
 861         if (!validate_pathname($file_parent)) {
 862                 die_error(400, "Invalid file parent parameter");
 863         }
 864 }
 865
 866 # parameters which are refnames
 867 our $hash = $input_params{'hash'};
 868 if (defined $hash) {
 869         if (!validate_refname($hash)) {
 870                 die_error(400, "Invalid hash parameter");
 871         }
 872 }
 873
 874 our $hash_parent = $input_params{'hash_parent'};
 875 if (defined $hash_parent) {
 876         if (!validate_refname($hash_parent)) {
 877                 die_error(400, "Invalid hash parent parameter");
 878         }
 879 }
 880
 881 our $hash_base = $input_params{'hash_base'};
 882 if (defined $hash_base) {
 883         if (!validate_refname($hash_base)) {
 884                 die_error(400, "Invalid hash base parameter");
 885         }
 886 }
 887
 888 our @extra_options = @{$input_params{'extra_options'}};
 889 # @extra_options is always defined, since it can only be (currently) set from
 890 # CGI, and $cgi->param() returns the empty array in array context if the param
 891 # is not set
 892 foreach my $opt (@extra_options) {
 893         if (not exists $allowed_options{$opt}) {
 894                 die_error(400, "Invalid option parameter");
 895         }
 896         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 897                 die_error(400, "Invalid option parameter for this action");
 898         }
 899 }
 900
 901 our $hash_parent_base = $input_params{'hash_parent_base'};
 902 if (defined $hash_parent_base) {
 903         if (!validate_refname($hash_parent_base)) {
 904                 die_error(400, "Invalid hash parent base parameter");
 905         }
 906 }
 907
 908 # other parameters
 909 our $page = $input_params{'page'};
 910 if (defined $page) {
 911         if ($page =~ m/[^0-9]/) {
 912                 die_error(400, "Invalid page parameter");
 913         }
 914 }
 915
 916 our $searchtype = $input_params{'searchtype'};
 917 if (defined $searchtype) {
 918         if ($searchtype =~ m/[^a-z]/) {
 919                 die_error(400, "Invalid searchtype parameter");
 920         }
 921 }
 922
 923 our $search_use_regexp = $input_params{'search_use_regexp'};
 924
 925 our $searchtext = $input_params{'searchtext'};
 926 our $search_regexp;
 927 if (defined $searchtext) {
 928         if (length($searchtext) < 2) {
 929                 die_error(403, "At least two characters are required for search parameter");
 930         }
 931         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 932 }
 933
 934 # path to the current git repository
 935 our $git_dir;
 936 $git_dir = "$projectroot/$project" if $project;
 937
 938 # list of supported snapshot formats
 939 our @snapshot_fmts = gitweb_get_feature('snapshot');
 940 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 941
 942 # check that the avatar feature is set to a known provider name,
 943 # and for each provider check if the dependencies are satisfied.
 944 # if the provider name is invalid or the dependencies are not met,
 945 # reset $git_avatar to the empty string.
 946 our ($git_avatar) = gitweb_get_feature('avatar');
 947 if ($git_avatar eq 'gravatar') {
 948         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 949 } elsif ($git_avatar eq 'picon') {
 950         # no dependencies
 951 } else {
 952         $git_avatar = '';
 953 }
 954
 955 # custom error handler: 'die <message>' is Internal Server Error
 956 sub handle_errors_html {
 957         my $msg = shift; # it is already HTML escaped
 958
 959         # to avoid infinite loop where error occurs in die_error,
 960         # change handler to default handler, disabling handle_errors_html
 961         set_message("Error occured when inside die_error:\n$msg");
 962
 963         # you cannot jump out of die_error when called as error handler;
 964         # the subroutine set via CGI::Carp::set_message is called _after_
 965         # HTTP headers are already written, so it cannot write them itself
 966         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
 967 }
 968 set_message(\&handle_errors_html);
 969
 970 # dispatch
 971 if (!defined $action) {
 972         if (defined $hash) {
 973                 $action = git_get_type($hash);
 974         } elsif (defined $hash_base && defined $file_name) {
 975                 $action = git_get_type("$hash_base:$file_name");
 976         } elsif (defined $project) {
 977                 $action = 'summary';
 978         } else {
 979                 $action = 'project_list';
 980         }
 981 }
 982 if (!defined($actions{$action})) {
 983         die_error(400, "Unknown action");
 984 }
 985 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 986     !$project) {
 987         die_error(400, "Project needed");
 988 }
 989 $actions{$action}->();
 990 DONE_GITWEB:
 991 1;
 992
 993 ## ======================================================================
 994 ## action links
 995
 996 # possible values of extra options
 997 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
 998 # -replay => 1      - start from a current view (replay with modifications)
 999 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1000 sub href {
1001         my %params = @_;
1002         # default is to use -absolute url() i.e. $my_uri
1003         my $href = $params{-full} ? $my_url : $my_uri;
1004
1005         $params{'project'} = $project unless exists $params{'project'};
1006
1007         if ($params{-replay}) {
1008                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1009                         if (!exists $params{$name}) {
1010                                 $params{$name} = $input_params{$name};
1011                         }
1012                 }
1013         }
1014
1015         my $use_pathinfo = gitweb_check_feature('pathinfo');
1016         if (defined $params{'project'} &&
1017             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1018                 # try to put as many parameters as possible in PATH_INFO:
1019                 #   - project name
1020                 #   - action
1021                 #   - hash_parent or hash_parent_base:/file_parent
1022                 #   - hash or hash_base:/filename
1023                 #   - the snapshot_format as an appropriate suffix
1024
1025                 # When the script is the root DirectoryIndex for the domain,
1026                 # $href here would be something like http://gitweb.example.com/
1027                 # Thus, we strip any trailing / from $href, to spare us double
1028                 # slashes in the final URL
1029                 $href =~ s,/$,,;
1030
1031                 # Then add the project name, if present
1032                 $href .= "/".esc_url($params{'project'});
1033                 delete $params{'project'};
1034
1035                 # since we destructively absorb parameters, we keep this
1036                 # boolean that remembers if we're handling a snapshot
1037                 my $is_snapshot = $params{'action'} eq 'snapshot';
1038
1039                 # Summary just uses the project path URL, any other action is
1040                 # added to the URL
1041                 if (defined $params{'action'}) {
1042                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1043                         delete $params{'action'};
1044                 }
1045
1046                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1047                 # stripping nonexistent or useless pieces
1048                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1049                         || $params{'hash_parent'} || $params{'hash'});
1050                 if (defined $params{'hash_base'}) {
1051                         if (defined $params{'hash_parent_base'}) {
1052                                 $href .= esc_url($params{'hash_parent_base'});
1053                                 # skip the file_parent if it's the same as the file_name
1054                                 if (defined $params{'file_parent'}) {
1055                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1056                                                 delete $params{'file_parent'};
1057                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1058                                                 $href .= ":/".esc_url($params{'file_parent'});
1059                                                 delete $params{'file_parent'};
1060                                         }
1061                                 }
1062                                 $href .= "..";
1063                                 delete $params{'hash_parent'};
1064                                 delete $params{'hash_parent_base'};
1065                         } elsif (defined $params{'hash_parent'}) {
1066                                 $href .= esc_url($params{'hash_parent'}). "..";
1067                                 delete $params{'hash_parent'};
1068                         }
1069
1070                         $href .= esc_url($params{'hash_base'});
1071                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1072                                 $href .= ":/".esc_url($params{'file_name'});
1073                                 delete $params{'file_name'};
1074                         }
1075                         delete $params{'hash'};
1076                         delete $params{'hash_base'};
1077                 } elsif (defined $params{'hash'}) {
1078                         $href .= esc_url($params{'hash'});
1079                         delete $params{'hash'};
1080                 }
1081
1082                 # If the action was a snapshot, we can absorb the
1083                 # snapshot_format parameter too
1084                 if ($is_snapshot) {
1085                         my $fmt = $params{'snapshot_format'};
1086                         # snapshot_format should always be defined when href()
1087                         # is called, but just in case some code forgets, we
1088                         # fall back to the default
1089                         $fmt ||= $snapshot_fmts[0];
1090                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1091                         delete $params{'snapshot_format'};
1092                 }
1093         }
1094
1095         # now encode the parameters explicitly
1096         my @result = ();
1097         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1098                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1099                 if (defined $params{$name}) {
1100                         if (ref($params{$name}) eq "ARRAY") {
1101                                 foreach my $par (@{$params{$name}}) {
1102                                         push @result, $symbol . "=" . esc_param($par);
1103                                 }
1104                         } else {
1105                                 push @result, $symbol . "=" . esc_param($params{$name});
1106                         }
1107                 }
1108         }
1109         $href .= "?" . join(';', @result) if scalar @result;
1110
1111         return $href;
1112 }
1113
1114
1115 ## ======================================================================
1116 ## validation, quoting/unquoting and escaping
1117
1118 sub validate_action {
1119         my $input = shift || return undef;
1120         return undef unless exists $actions{$input};
1121         return $input;
1122 }
1123
1124 sub validate_project {
1125         my $input = shift || return undef;
1126         if (!validate_pathname($input) ||
1127                 !(-d "$projectroot/$input") ||
1128                 !check_export_ok("$projectroot/$input") ||
1129                 ($strict_export && !project_in_list($input))) {
1130                 return undef;
1131         } else {
1132                 return $input;
1133         }
1134 }
1135
1136 sub validate_pathname {
1137         my $input = shift || return undef;
1138
1139         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1140         # at the beginning, at the end, and between slashes.
1141         # also this catches doubled slashes
1142         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1143                 return undef;
1144         }
1145         # no null characters
1146         if ($input =~ m!\0!) {
1147                 return undef;
1148         }
1149         return $input;
1150 }
1151
1152 sub validate_refname {
1153         my $input = shift || return undef;
1154
1155         # textual hashes are O.K.
1156         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1157                 return $input;
1158         }
1159         # it must be correct pathname
1160         $input = validate_pathname($input)
1161                 or return undef;
1162         # restrictions on ref name according to git-check-ref-format
1163         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1164                 return undef;
1165         }
1166         return $input;
1167 }
1168
1169 # decode sequences of octets in utf8 into Perl's internal form,
1170 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1171 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1172 sub to_utf8 {
1173         my $str = shift;
1174         return undef unless defined $str;
1175         if (utf8::valid($str)) {
1176                 utf8::decode($str);
1177                 return $str;
1178         } else {
1179                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1180         }
1181 }
1182
1183 # quote unsafe chars, but keep the slash, even when it's not
1184 # correct, but quoted slashes look too horrible in bookmarks
1185 sub esc_param {
1186         my $str = shift;
1187         return undef unless defined $str;
1188         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1189         $str =~ s/ /\+/g;
1190         return $str;
1191 }
1192
1193 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1194 sub esc_url {
1195         my $str = shift;
1196         return undef unless defined $str;
1197         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1198         $str =~ s/\+/%2B/g;
1199         $str =~ s/ /\+/g;
1200         return $str;
1201 }
1202
1203 # replace invalid utf8 character with SUBSTITUTION sequence
1204 sub esc_html {
1205         my $str = shift;
1206         my %opts = @_;
1207
1208         return undef unless defined $str;
1209
1210         $str = to_utf8($str);
1211         $str = $cgi->escapeHTML($str);
1212         if ($opts{'-nbsp'}) {
1213                 $str =~ s/ /&nbsp;/g;
1214         }
1215         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1216         return $str;
1217 }
1218
1219 # quote control characters and escape filename to HTML
1220 sub esc_path {
1221         my $str = shift;
1222         my %opts = @_;
1223
1224         return undef unless defined $str;
1225
1226         $str = to_utf8($str);
1227         $str = $cgi->escapeHTML($str);
1228         if ($opts{'-nbsp'}) {
1229                 $str =~ s/ /&nbsp;/g;
1230         }
1231         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1232         return $str;
1233 }
1234
1235 # Make control characters "printable", using character escape codes (CEC)
1236 sub quot_cec {
1237         my $cntrl = shift;
1238         my %opts = @_;
1239         my %es = ( # character escape codes, aka escape sequences
1240                 "\t" => '\t',   # tab            (HT)
1241                 "\n" => '\n',   # line feed      (LF)
1242                 "\r" => '\r',   # carrige return (CR)
1243                 "\f" => '\f',   # form feed      (FF)
1244                 "\b" => '\b',   # backspace      (BS)
1245                 "\a" => '\a',   # alarm (bell)   (BEL)
1246                 "\e" => '\e',   # escape         (ESC)
1247                 "\013" => '\v', # vertical tab   (VT)
1248                 "\000" => '\0', # nul character  (NUL)
1249         );
1250         my $chr = ( (exists $es{$cntrl})
1251                     ? $es{$cntrl}
1252                     : sprintf('\%2x', ord($cntrl)) );
1253         if ($opts{-nohtml}) {
1254                 return $chr;
1255         } else {
1256                 return "<span class=\"cntrl\">$chr</span>";
1257         }
1258 }
1259
1260 # Alternatively use unicode control pictures codepoints,
1261 # Unicode "printable representation" (PR)
1262 sub quot_upr {
1263         my $cntrl = shift;
1264         my %opts = @_;
1265
1266         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1267         if ($opts{-nohtml}) {
1268                 return $chr;
1269         } else {
1270                 return "<span class=\"cntrl\">$chr</span>";
1271         }
1272 }
1273
1274 # git may return quoted and escaped filenames
1275 sub unquote {
1276         my $str = shift;
1277
1278         sub unq {
1279                 my $seq = shift;
1280                 my %es = ( # character escape codes, aka escape sequences
1281                         't' => "\t",   # tab            (HT, TAB)
1282                         'n' => "\n",   # newline        (NL)
1283                         'r' => "\r",   # return         (CR)
1284                         'f' => "\f",   # form feed      (FF)
1285                         'b' => "\b",   # backspace      (BS)
1286                         'a' => "\a",   # alarm (bell)   (BEL)
1287                         'e' => "\e",   # escape         (ESC)
1288                         'v' => "\013", # vertical tab   (VT)
1289                 );
1290
1291                 if ($seq =~ m/^[0-7]{1,3}$/) {
1292                         # octal char sequence
1293                         return chr(oct($seq));
1294                 } elsif (exists $es{$seq}) {
1295                         # C escape sequence, aka character escape code
1296                         return $es{$seq};
1297                 }
1298                 # quoted ordinary character
1299                 return $seq;
1300         }
1301
1302         if ($str =~ m/^"(.*)"$/) {
1303                 # needs unquoting
1304                 $str = $1;
1305                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1306         }
1307         return $str;
1308 }
1309
1310 # escape tabs (convert tabs to spaces)
1311 sub untabify {
1312         my $line = shift;
1313
1314         while ((my $pos = index($line, "\t")) != -1) {
1315                 if (my $count = (8 - ($pos % 8))) {
1316                         my $spaces = ' ' x $count;
1317                         $line =~ s/\t/$spaces/;
1318                 }
1319         }
1320
1321         return $line;
1322 }
1323
1324 sub project_in_list {
1325         my $project = shift;
1326         my @list = git_get_projects_list();
1327         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1328 }
1329
1330 ## ----------------------------------------------------------------------
1331 ## HTML aware string manipulation
1332
1333 # Try to chop given string on a word boundary between position
1334 # $len and $len+$add_len. If there is no word boundary there,
1335 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1336 # (marking chopped part) would be longer than given string.
1337 sub chop_str {
1338         my $str = shift;
1339         my $len = shift;
1340         my $add_len = shift || 10;
1341         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1342
1343         # Make sure perl knows it is utf8 encoded so we don't
1344         # cut in the middle of a utf8 multibyte char.
1345         $str = to_utf8($str);
1346
1347         # allow only $len chars, but don't cut a word if it would fit in $add_len
1348         # if it doesn't fit, cut it if it's still longer than the dots we would add
1349         # remove chopped character entities entirely
1350
1351         # when chopping in the middle, distribute $len into left and right part
1352         # return early if chopping wouldn't make string shorter
1353         if ($where eq 'center') {
1354                 return $str if ($len + 5 >= length($str)); # filler is length 5
1355                 $len = int($len/2);
1356         } else {
1357                 return $str if ($len + 4 >= length($str)); # filler is length 4
1358         }
1359
1360         # regexps: ending and beginning with word part up to $add_len
1361         my $endre = qr/.{$len}\w{0,$add_len}/;
1362         my $begre = qr/\w{0,$add_len}.{$len}/;
1363
1364         if ($where eq 'left') {
1365                 $str =~ m/^(.*?)($begre)$/;
1366                 my ($lead, $body) = ($1, $2);
1367                 if (length($lead) > 4) {
1368                         $lead = " ...";
1369                 }
1370                 return "$lead$body";
1371
1372         } elsif ($where eq 'center') {
1373                 $str =~ m/^($endre)(.*)$/;
1374                 my ($left, $str)  = ($1, $2);
1375                 $str =~ m/^(.*?)($begre)$/;
1376                 my ($mid, $right) = ($1, $2);
1377                 if (length($mid) > 5) {
1378                         $mid = " ... ";
1379                 }
1380                 return "$left$mid$right";
1381
1382         } else {
1383                 $str =~ m/^($endre)(.*)$/;
1384                 my $body = $1;
1385                 my $tail = $2;
1386                 if (length($tail) > 4) {
1387                         $tail = "... ";
1388                 }
1389                 return "$body$tail";
1390         }
1391 }
1392
1393 # takes the same arguments as chop_str, but also wraps a <span> around the
1394 # result with a title attribute if it does get chopped. Additionally, the
1395 # string is HTML-escaped.
1396 sub chop_and_escape_str {
1397         my ($str) = @_;
1398
1399         my $chopped = chop_str(@_);
1400         if ($chopped eq $str) {
1401                 return esc_html($chopped);
1402         } else {
1403                 $str =~ s/[[:cntrl:]]/?/g;
1404                 return $cgi->span({-title=>$str}, esc_html($chopped));
1405         }
1406 }
1407
1408 ## ----------------------------------------------------------------------
1409 ## functions returning short strings
1410
1411 # CSS class for given age value (in seconds)
1412 sub age_class {
1413         my $age = shift;
1414
1415         if (!defined $age) {
1416                 return "noage";
1417         } elsif ($age < 60*60*2) {
1418                 return "age0";
1419         } elsif ($age < 60*60*24*2) {
1420                 return "age1";
1421         } else {
1422                 return "age2";
1423         }
1424 }
1425
1426 # convert age in seconds to "nn units ago" string
1427 sub age_string {
1428         my $age = shift;
1429         my $age_str;
1430
1431         if ($age > 60*60*24*365*2) {
1432                 $age_str = (int $age/60/60/24/365);
1433                 $age_str .= " years ago";
1434         } elsif ($age > 60*60*24*(365/12)*2) {
1435                 $age_str = int $age/60/60/24/(365/12);
1436                 $age_str .= " months ago";
1437         } elsif ($age > 60*60*24*7*2) {
1438                 $age_str = int $age/60/60/24/7;
1439                 $age_str .= " weeks ago";
1440         } elsif ($age > 60*60*24*2) {
1441                 $age_str = int $age/60/60/24;
1442                 $age_str .= " days ago";
1443         } elsif ($age > 60*60*2) {
1444                 $age_str = int $age/60/60;
1445                 $age_str .= " hours ago";
1446         } elsif ($age > 60*2) {
1447                 $age_str = int $age/60;
1448                 $age_str .= " min ago";
1449         } elsif ($age > 2) {
1450                 $age_str = int $age;
1451                 $age_str .= " sec ago";
1452         } else {
1453                 $age_str .= " right now";
1454         }
1455         return $age_str;
1456 }
1457
1458 use constant {
1459         S_IFINVALID => 0030000,
1460         S_IFGITLINK => 0160000,
1461 };
1462
1463 # submodule/subproject, a commit object reference
1464 sub S_ISGITLINK {
1465         my $mode = shift;
1466
1467         return (($mode & S_IFMT) == S_IFGITLINK)
1468 }
1469
1470 # convert file mode in octal to symbolic file mode string
1471 sub mode_str {
1472         my $mode = oct shift;
1473
1474         if (S_ISGITLINK($mode)) {
1475                 return 'm---------';
1476         } elsif (S_ISDIR($mode & S_IFMT)) {
1477                 return 'drwxr-xr-x';
1478         } elsif (S_ISLNK($mode)) {
1479                 return 'lrwxrwxrwx';
1480         } elsif (S_ISREG($mode)) {
1481                 # git cares only about the executable bit
1482                 if ($mode & S_IXUSR) {
1483                         return '-rwxr-xr-x';
1484                 } else {
1485                         return '-rw-r--r--';
1486                 };
1487         } else {
1488                 return '----------';
1489         }
1490 }
1491
1492 # convert file mode in octal to file type string
1493 sub file_type {
1494         my $mode = shift;
1495
1496         if ($mode !~ m/^[0-7]+$/) {
1497                 return $mode;
1498         } else {
1499                 $mode = oct $mode;
1500         }
1501
1502         if (S_ISGITLINK($mode)) {
1503                 return "submodule";
1504         } elsif (S_ISDIR($mode & S_IFMT)) {
1505                 return "directory";
1506         } elsif (S_ISLNK($mode)) {
1507                 return "symlink";
1508         } elsif (S_ISREG($mode)) {
1509                 return "file";
1510         } else {
1511                 return "unknown";
1512         }
1513 }
1514
1515 # convert file mode in octal to file type description string
1516 sub file_type_long {
1517         my $mode = shift;
1518
1519         if ($mode !~ m/^[0-7]+$/) {
1520                 return $mode;
1521         } else {
1522                 $mode = oct $mode;
1523         }
1524
1525         if (S_ISGITLINK($mode)) {
1526                 return "submodule";
1527         } elsif (S_ISDIR($mode & S_IFMT)) {
1528                 return "directory";
1529         } elsif (S_ISLNK($mode)) {
1530                 return "symlink";
1531         } elsif (S_ISREG($mode)) {
1532                 if ($mode & S_IXUSR) {
1533                         return "executable";
1534                 } else {
1535                         return "file";
1536                 };
1537         } else {
1538                 return "unknown";
1539         }
1540 }
1541
1542
1543 ## ----------------------------------------------------------------------
1544 ## functions returning short HTML fragments, or transforming HTML fragments
1545 ## which don't belong to other sections
1546
1547 # format line of commit message.
1548 sub format_log_line_html {
1549         my $line = shift;
1550
1551         $line = esc_html($line, -nbsp=>1);
1552         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1553                 $cgi->a({-href => href(action=>"object", hash=>$1),
1554                                         -class => "text"}, $1);
1555         }eg;
1556
1557         return $line;
1558 }
1559
1560 # format marker of refs pointing to given object
1561
1562 # the destination action is chosen based on object type and current context:
1563 # - for annotated tags, we choose the tag view unless it's the current view
1564 #   already, in which case we go to shortlog view
1565 # - for other refs, we keep the current view if we're in history, shortlog or
1566 #   log view, and select shortlog otherwise
1567 sub format_ref_marker {
1568         my ($refs, $id) = @_;
1569         my $markers = '';
1570
1571         if (defined $refs->{$id}) {
1572                 foreach my $ref (@{$refs->{$id}}) {
1573                         # this code exploits the fact that non-lightweight tags are the
1574                         # only indirect objects, and that they are the only objects for which
1575                         # we want to use tag instead of shortlog as action
1576                         my ($type, $name) = qw();
1577                         my $indirect = ($ref =~ s/\^\{\}$//);
1578                         # e.g. tags/v2.6.11 or heads/next
1579                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1580                                 $type = $1;
1581                                 $name = $2;
1582                         } else {
1583                                 $type = "ref";
1584                                 $name = $ref;
1585                         }
1586
1587                         my $class = $type;
1588                         $class .= " indirect" if $indirect;
1589
1590                         my $dest_action = "shortlog";
1591
1592                         if ($indirect) {
1593                                 $dest_action = "tag" unless $action eq "tag";
1594                         } elsif ($action =~ /^(history|(short)?log)$/) {
1595                                 $dest_action = $action;
1596                         }
1597
1598                         my $dest = "";
1599                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1600                         $dest .= $ref;
1601
1602                         my $link = $cgi->a({
1603                                 -href => href(
1604                                         action=>$dest_action,
1605                                         hash=>$dest
1606                                 )}, $name);
1607
1608                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1609                                 $link . "</span>";
1610                 }
1611         }
1612
1613         if ($markers) {
1614                 return ' <span class="refs">'. $markers . '</span>';
1615         } else {
1616                 return "";
1617         }
1618 }
1619
1620 # format, perhaps shortened and with markers, title line
1621 sub format_subject_html {
1622         my ($long, $short, $href, $extra) = @_;
1623         $extra = '' unless defined($extra);
1624
1625         if (length($short) < length($long)) {
1626                 $long =~ s/[[:cntrl:]]/?/g;
1627                 return $cgi->a({-href => $href, -class => "list subject",
1628                                 -title => to_utf8($long)},
1629                        esc_html($short)) . $extra;
1630         } else {
1631                 return $cgi->a({-href => $href, -class => "list subject"},
1632                        esc_html($long)) . $extra;
1633         }
1634 }
1635
1636 # Rather than recomputing the url for an email multiple times, we cache it
1637 # after the first hit. This gives a visible benefit in views where the avatar
1638 # for the same email is used repeatedly (e.g. shortlog).
1639 # The cache is shared by all avatar engines (currently gravatar only), which
1640 # are free to use it as preferred. Since only one avatar engine is used for any
1641 # given page, there's no risk for cache conflicts.
1642 our %avatar_cache = ();
1643
1644 # Compute the picon url for a given email, by using the picon search service over at
1645 # http://www.cs.indiana.edu/picons/search.html
1646 sub picon_url {
1647         my $email = lc shift;
1648         if (!$avatar_cache{$email}) {
1649                 my ($user, $domain) = split('@', $email);
1650                 $avatar_cache{$email} =
1651                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1652                         "$domain/$user/" .
1653                         "users+domains+unknown/up/single";
1654         }
1655         return $avatar_cache{$email};
1656 }
1657
1658 # Compute the gravatar url for a given email, if it's not in the cache already.
1659 # Gravatar stores only the part of the URL before the size, since that's the
1660 # one computationally more expensive. This also allows reuse of the cache for
1661 # different sizes (for this particular engine).
1662 sub gravatar_url {
1663         my $email = lc shift;
1664         my $size = shift;
1665         $avatar_cache{$email} ||=
1666                 "http://www.gravatar.com/avatar/" .
1667                         Digest::MD5::md5_hex($email) . "?s=";
1668         return $avatar_cache{$email} . $size;
1669 }
1670
1671 # Insert an avatar for the given $email at the given $size if the feature
1672 # is enabled.
1673 sub git_get_avatar {
1674         my ($email, %opts) = @_;
1675         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1676         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1677         $opts{-size} ||= 'default';
1678         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1679         my $url = "";
1680         if ($git_avatar eq 'gravatar') {
1681                 $url = gravatar_url($email, $size);
1682         } elsif ($git_avatar eq 'picon') {
1683                 $url = picon_url($email);
1684         }
1685         # Other providers can be added by extending the if chain, defining $url
1686         # as needed. If no variant puts something in $url, we assume avatars
1687         # are completely disabled/unavailable.
1688         if ($url) {
1689                 return $pre_white .
1690                        "<img width=\"$size\" " .
1691                             "class=\"avatar\" " .
1692                             "src=\"$url\" " .
1693                             "alt=\"\" " .
1694                        "/>" . $post_white;
1695         } else {
1696                 return "";
1697         }
1698 }
1699
1700 sub format_search_author {
1701         my ($author, $searchtype, $displaytext) = @_;
1702         my $have_search = gitweb_check_feature('search');
1703
1704         if ($have_search) {
1705                 my $performed = "";
1706                 if ($searchtype eq 'author') {
1707                         $performed = "authored";
1708                 } elsif ($searchtype eq 'committer') {
1709                         $performed = "committed";
1710                 }
1711
1712                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1713                                 searchtext=>$author,
1714                                 searchtype=>$searchtype), class=>"list",
1715                                 title=>"Search for commits $performed by $author"},
1716                                 $displaytext);
1717
1718         } else {
1719                 return $displaytext;
1720         }
1721 }
1722
1723 # format the author name of the given commit with the given tag
1724 # the author name is chopped and escaped according to the other
1725 # optional parameters (see chop_str).
1726 sub format_author_html {
1727         my $tag = shift;
1728         my $co = shift;
1729         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1730         return "<$tag class=\"author\">" .
1731                format_search_author($co->{'author_name'}, "author",
1732                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1733                        $author) .
1734                "</$tag>";
1735 }
1736
1737 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1738 sub format_git_diff_header_line {
1739         my $line = shift;
1740         my $diffinfo = shift;
1741         my ($from, $to) = @_;
1742
1743         if ($diffinfo->{'nparents'}) {
1744                 # combined diff
1745                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1746                 if ($to->{'href'}) {
1747                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1748                                          esc_path($to->{'file'}));
1749                 } else { # file was deleted (no href)
1750                         $line .= esc_path($to->{'file'});
1751                 }
1752         } else {
1753                 # "ordinary" diff
1754                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1755                 if ($from->{'href'}) {
1756                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1757                                          'a/' . esc_path($from->{'file'}));
1758                 } else { # file was added (no href)
1759                         $line .= 'a/' . esc_path($from->{'file'});
1760                 }
1761                 $line .= ' ';
1762                 if ($to->{'href'}) {
1763                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1764                                          'b/' . esc_path($to->{'file'}));
1765                 } else { # file was deleted
1766                         $line .= 'b/' . esc_path($to->{'file'});
1767                 }
1768         }
1769
1770         return "<div class=\"diff header\">$line</div>\n";
1771 }
1772
1773 # format extended diff header line, before patch itself
1774 sub format_extended_diff_header_line {
1775         my $line = shift;
1776         my $diffinfo = shift;
1777         my ($from, $to) = @_;
1778
1779         # match <path>
1780         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1781                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1782                                        esc_path($from->{'file'}));
1783         }
1784         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1785                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1786                                  esc_path($to->{'file'}));
1787         }
1788         # match single <mode>
1789         if ($line =~ m/\s(\d{6})$/) {
1790                 $line .= '<span class="info"> (' .
1791                          file_type_long($1) .
1792                          ')</span>';
1793         }
1794         # match <hash>
1795         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1796                 # can match only for combined diff
1797                 $line = 'index ';
1798                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1799                         if ($from->{'href'}[$i]) {
1800                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1801                                                   -class=>"hash"},
1802                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1803                         } else {
1804                                 $line .= '0' x 7;
1805                         }
1806                         # separator
1807                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1808                 }
1809                 $line .= '..';
1810                 if ($to->{'href'}) {
1811                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1812                                          substr($diffinfo->{'to_id'},0,7));
1813                 } else {
1814                         $line .= '0' x 7;
1815                 }
1816
1817         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1818                 # can match only for ordinary diff
1819                 my ($from_link, $to_link);
1820                 if ($from->{'href'}) {
1821                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1822                                              substr($diffinfo->{'from_id'},0,7));
1823                 } else {
1824                         $from_link = '0' x 7;
1825                 }
1826                 if ($to->{'href'}) {
1827                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1828                                            substr($diffinfo->{'to_id'},0,7));
1829                 } else {
1830                         $to_link = '0' x 7;
1831                 }
1832                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1833                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1834         }
1835
1836         return $line . "<br/>\n";
1837 }
1838
1839 # format from-file/to-file diff header
1840 sub format_diff_from_to_header {
1841         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1842         my $line;
1843         my $result = '';
1844
1845         $line = $from_line;
1846         #assert($line =~ m/^---/) if DEBUG;
1847         # no extra formatting for "^--- /dev/null"
1848         if (! $diffinfo->{'nparents'}) {
1849                 # ordinary (single parent) diff
1850                 if ($line =~ m!^--- "?a/!) {
1851                         if ($from->{'href'}) {
1852                                 $line = '--- a/' .
1853                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1854                                                 esc_path($from->{'file'}));
1855                         } else {
1856                                 $line = '--- a/' .
1857                                         esc_path($from->{'file'});
1858                         }
1859                 }
1860                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1861
1862         } else {
1863                 # combined diff (merge commit)
1864                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1865                         if ($from->{'href'}[$i]) {
1866                                 $line = '--- ' .
1867                                         $cgi->a({-href=>href(action=>"blobdiff",
1868                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1869                                                              hash_parent_base=>$parents[$i],
1870                                                              file_parent=>$from->{'file'}[$i],
1871                                                              hash=>$diffinfo->{'to_id'},
1872                                                              hash_base=>$hash,
1873                                                              file_name=>$to->{'file'}),
1874                                                  -class=>"path",
1875                                                  -title=>"diff" . ($i+1)},
1876                                                 $i+1) .
1877                                         '/' .
1878                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1879                                                 esc_path($from->{'file'}[$i]));
1880                         } else {
1881                                 $line = '--- /dev/null';
1882                         }
1883                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1884                 }
1885         }
1886
1887         $line = $to_line;
1888         #assert($line =~ m/^\+\+\+/) if DEBUG;
1889         # no extra formatting for "^+++ /dev/null"
1890         if ($line =~ m!^\+\+\+ "?b/!) {
1891                 if ($to->{'href'}) {
1892                         $line = '+++ b/' .
1893                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1894                                         esc_path($to->{'file'}));
1895                 } else {
1896                         $line = '+++ b/' .
1897                                 esc_path($to->{'file'});
1898                 }
1899         }
1900         $result .= qq!<div class="diff to_file">$line</div>\n!;
1901
1902         return $result;
1903 }
1904
1905 # create note for patch simplified by combined diff
1906 sub format_diff_cc_simplified {
1907         my ($diffinfo, @parents) = @_;
1908         my $result = '';
1909
1910         $result .= "<div class=\"diff header\">" .
1911                    "diff --cc ";
1912         if (!is_deleted($diffinfo)) {
1913                 $result .= $cgi->a({-href => href(action=>"blob",
1914                                                   hash_base=>$hash,
1915                                                   hash=>$diffinfo->{'to_id'},
1916                                                   file_name=>$diffinfo->{'to_file'}),
1917                                     -class => "path"},
1918                                    esc_path($diffinfo->{'to_file'}));
1919         } else {
1920                 $result .= esc_path($diffinfo->{'to_file'});
1921         }
1922         $result .= "</div>\n" . # class="diff header"
1923                    "<div class=\"diff nodifferences\">" .
1924                    "Simple merge" .
1925                    "</div>\n"; # class="diff nodifferences"
1926
1927         return $result;
1928 }
1929
1930 # format patch (diff) line (not to be used for diff headers)
1931 sub format_diff_line {
1932         my $line = shift;
1933         my ($from, $to) = @_;
1934         my $diff_class = "";
1935
1936         chomp $line;
1937
1938         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1939                 # combined diff
1940                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1941                 if ($line =~ m/^\@{3}/) {
1942                         $diff_class = " chunk_header";
1943                 } elsif ($line =~ m/^\\/) {
1944                         $diff_class = " incomplete";
1945                 } elsif ($prefix =~ tr/+/+/) {
1946                         $diff_class = " add";
1947                 } elsif ($prefix =~ tr/-/-/) {
1948                         $diff_class = " rem";
1949                 }
1950         } else {
1951                 # assume ordinary diff
1952                 my $char = substr($line, 0, 1);
1953                 if ($char eq '+') {
1954                         $diff_class = " add";
1955                 } elsif ($char eq '-') {
1956                         $diff_class = " rem";
1957                 } elsif ($char eq '@') {
1958                         $diff_class = " chunk_header";
1959                 } elsif ($char eq "\\") {
1960                         $diff_class = " incomplete";
1961                 }
1962         }
1963         $line = untabify($line);
1964         if ($from && $to && $line =~ m/^\@{2} /) {
1965                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1966                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1967
1968                 $from_lines = 0 unless defined $from_lines;
1969                 $to_lines   = 0 unless defined $to_lines;
1970
1971                 if ($from->{'href'}) {
1972                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1973                                              -class=>"list"}, $from_text);
1974                 }
1975                 if ($to->{'href'}) {
1976                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1977                                              -class=>"list"}, $to_text);
1978                 }
1979                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1980                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1981                 return "<div class=\"diff$diff_class\">$line</div>\n";
1982         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1983                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1984                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1985
1986                 @from_text = split(' ', $ranges);
1987                 for (my $i = 0; $i < @from_text; ++$i) {
1988                         ($from_start[$i], $from_nlines[$i]) =
1989                                 (split(',', substr($from_text[$i], 1)), 0);
1990                 }
1991
1992                 $to_text   = pop @from_text;
1993                 $to_start  = pop @from_start;
1994                 $to_nlines = pop @from_nlines;
1995
1996                 $line = "<span class=\"chunk_info\">$prefix ";
1997                 for (my $i = 0; $i < @from_text; ++$i) {
1998                         if ($from->{'href'}[$i]) {
1999                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2000                                                   -class=>"list"}, $from_text[$i]);
2001                         } else {
2002                                 $line .= $from_text[$i];
2003                         }
2004                         $line .= " ";
2005                 }
2006                 if ($to->{'href'}) {
2007                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2008                                           -class=>"list"}, $to_text);
2009                 } else {
2010                         $line .= $to_text;
2011                 }
2012                 $line .= " $prefix</span>" .
2013                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2014                 return "<div class=\"diff$diff_class\">$line</div>\n";
2015         }
2016         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2017 }
2018
2019 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2020 # linked.  Pass the hash of the tree/commit to snapshot.
2021 sub format_snapshot_links {
2022         my ($hash) = @_;
2023         my $num_fmts = @snapshot_fmts;
2024         if ($num_fmts > 1) {
2025                 # A parenthesized list of links bearing format names.
2026                 # e.g. "snapshot (_tar.gz_ _zip_)"
2027                 return "snapshot (" . join(' ', map
2028                         $cgi->a({
2029                                 -href => href(
2030                                         action=>"snapshot",
2031                                         hash=>$hash,
2032                                         snapshot_format=>$_
2033                                 )
2034                         }, $known_snapshot_formats{$_}{'display'})
2035                 , @snapshot_fmts) . ")";
2036         } elsif ($num_fmts == 1) {
2037                 # A single "snapshot" link whose tooltip bears the format name.
2038                 # i.e. "_snapshot_"
2039                 my ($fmt) = @snapshot_fmts;
2040                 return
2041                         $cgi->a({
2042                                 -href => href(
2043                                         action=>"snapshot",
2044                                         hash=>$hash,
2045                                         snapshot_format=>$fmt
2046                                 ),
2047                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2048                         }, "snapshot");
2049         } else { # $num_fmts == 0
2050                 return undef;
2051         }
2052 }
2053
2054 ## ......................................................................
2055 ## functions returning values to be passed, perhaps after some
2056 ## transformation, to other functions; e.g. returning arguments to href()
2057
2058 # returns hash to be passed to href to generate gitweb URL
2059 # in -title key it returns description of link
2060 sub get_feed_info {
2061         my $format = shift || 'Atom';
2062         my %res = (action => lc($format));
2063
2064         # feed links are possible only for project views
2065         return unless (defined $project);
2066         # some views should link to OPML, or to generic project feed,
2067         # or don't have specific feed yet (so they should use generic)
2068         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2069
2070         my $branch;
2071         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2072         # from tag links; this also makes possible to detect branch links
2073         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2074             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2075                 $branch = $1;
2076         }
2077         # find log type for feed description (title)
2078         my $type = 'log';
2079         if (defined $file_name) {
2080                 $type  = "history of $file_name";
2081                 $type .= "/" if ($action eq 'tree');
2082                 $type .= " on '$branch'" if (defined $branch);
2083         } else {
2084                 $type = "log of $branch" if (defined $branch);
2085         }
2086
2087         $res{-title} = $type;
2088         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2089         $res{'file_name'} = $file_name;
2090
2091         return %res;
2092 }
2093
2094 ## ----------------------------------------------------------------------
2095 ## git utility subroutines, invoking git commands
2096
2097 # returns path to the core git executable and the --git-dir parameter as list
2098 sub git_cmd {
2099         $number_of_git_cmds++;
2100         return $GIT, '--git-dir='.$git_dir;
2101 }
2102
2103 # quote the given arguments for passing them to the shell
2104 # quote_command("command", "arg 1", "arg with ' and ! characters")
2105 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2106 # Try to avoid using this function wherever possible.
2107 sub quote_command {
2108         return join(' ',
2109                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2110 }
2111
2112 # get HEAD ref of given project as hash
2113 sub git_get_head_hash {
2114         return git_get_full_hash(shift, 'HEAD');
2115 }
2116
2117 sub git_get_full_hash {
2118         return git_get_hash(@_);
2119 }
2120
2121 sub git_get_short_hash {
2122         return git_get_hash(@_, '--short=7');
2123 }
2124
2125 sub git_get_hash {
2126         my ($project, $hash, @options) = @_;
2127         my $o_git_dir = $git_dir;
2128         my $retval = undef;
2129         $git_dir = "$projectroot/$project";
2130         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2131             '--verify', '-q', @options, $hash) {
2132                 $retval = <$fd>;
2133                 chomp $retval if defined $retval;
2134                 close $fd;
2135         }
2136         if (defined $o_git_dir) {
2137                 $git_dir = $o_git_dir;
2138         }
2139         return $retval;
2140 }
2141
2142 # get type of given object
2143 sub git_get_type {
2144         my $hash = shift;
2145
2146         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2147         my $type = <$fd>;
2148         close $fd or return;
2149         chomp $type;
2150         return $type;
2151 }
2152
2153 # repository configuration
2154 our $config_file = '';
2155 our %config;
2156
2157 # store multiple values for single key as anonymous array reference
2158 # single values stored directly in the hash, not as [ <value> ]
2159 sub hash_set_multi {
2160         my ($hash, $key, $value) = @_;
2161
2162         if (!exists $hash->{$key}) {
2163                 $hash->{$key} = $value;
2164         } elsif (!ref $hash->{$key}) {
2165                 $hash->{$key} = [ $hash->{$key}, $value ];
2166         } else {
2167                 push @{$hash->{$key}}, $value;
2168         }
2169 }
2170
2171 # return hash of git project configuration
2172 # optionally limited to some section, e.g. 'gitweb'
2173 sub git_parse_project_config {
2174         my $section_regexp = shift;
2175         my %config;
2176
2177         local $/ = "\0";
2178
2179         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2180                 or return;
2181
2182         while (my $keyval = <$fh>) {
2183                 chomp $keyval;
2184                 my ($key, $value) = split(/\n/, $keyval, 2);
2185
2186                 hash_set_multi(\%config, $key, $value)
2187                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2188         }
2189         close $fh;
2190
2191         return %config;
2192 }
2193
2194 # convert config value to boolean: 'true' or 'false'
2195 # no value, number > 0, 'true' and 'yes' values are true
2196 # rest of values are treated as false (never as error)
2197 sub config_to_bool {
2198         my $val = shift;
2199
2200         return 1 if !defined $val;             # section.key
2201
2202         # strip leading and trailing whitespace
2203         $val =~ s/^\s+//;
2204         $val =~ s/\s+$//;
2205
2206         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2207                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2208 }
2209
2210 # convert config value to simple decimal number
2211 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2212 # to be multiplied by 1024, 1048576, or 1073741824
2213 sub config_to_int {
2214         my $val = shift;
2215
2216         # strip leading and trailing whitespace
2217         $val =~ s/^\s+//;
2218         $val =~ s/\s+$//;
2219
2220         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2221                 $unit = lc($unit);
2222                 # unknown unit is treated as 1
2223                 return $num * ($unit eq 'g' ? 1073741824 :
2224                                $unit eq 'm' ?    1048576 :
2225                                $unit eq 'k' ?       1024 : 1);
2226         }
2227         return $val;
2228 }
2229
2230 # convert config value to array reference, if needed
2231 sub config_to_multi {
2232         my $val = shift;
2233
2234         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2235 }
2236
2237 sub git_get_project_config {
2238         my ($key, $type) = @_;
2239
2240         return unless defined $git_dir;
2241
2242         # key sanity check
2243         return unless ($key);
2244         $key =~ s/^gitweb\.//;
2245         return if ($key =~ m/\W/);
2246
2247         # type sanity check
2248         if (defined $type) {
2249                 $type =~ s/^--//;
2250                 $type = undef
2251                         unless ($type eq 'bool' || $type eq 'int');
2252         }
2253
2254         # get config
2255         if (!defined $config_file ||
2256             $config_file ne "$git_dir/config") {
2257                 %config = git_parse_project_config('gitweb');
2258                 $config_file = "$git_dir/config";
2259         }
2260
2261         # check if config variable (key) exists
2262         return unless exists $config{"gitweb.$key"};
2263
2264         # ensure given type
2265         if (!defined $type) {
2266                 return $config{"gitweb.$key"};
2267         } elsif ($type eq 'bool') {
2268                 # backward compatibility: 'git config --bool' returns true/false
2269                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2270         } elsif ($type eq 'int') {
2271                 return config_to_int($config{"gitweb.$key"});
2272         }
2273         return $config{"gitweb.$key"};
2274 }
2275
2276 # get hash of given path at given ref
2277 sub git_get_hash_by_path {
2278         my $base = shift;
2279         my $path = shift || return undef;
2280         my $type = shift;
2281
2282         $path =~ s,/+$,,;
2283
2284         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2285                 or die_error(500, "Open git-ls-tree failed");
2286         my $line = <$fd>;
2287         close $fd or return undef;
2288
2289         if (!defined $line) {
2290                 # there is no tree or hash given by $path at $base
2291                 return undef;
2292         }
2293
2294         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2295         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2296         if (defined $type && $type ne $2) {
2297                 # type doesn't match
2298                 return undef;
2299         }
2300         return $3;
2301 }
2302
2303 # get path of entry with given hash at given tree-ish (ref)
2304 # used to get 'from' filename for combined diff (merge commit) for renames
2305 sub git_get_path_by_hash {
2306         my $base = shift || return;
2307         my $hash = shift || return;
2308
2309         local $/ = "\0";
2310
2311         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2312                 or return undef;
2313         while (my $line = <$fd>) {
2314                 chomp $line;
2315
2316                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2317                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2318                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2319                         close $fd;
2320                         return $1;
2321                 }
2322         }
2323         close $fd;
2324         return undef;
2325 }
2326
2327 ## ......................................................................
2328 ## git utility functions, directly accessing git repository
2329
2330 sub git_get_project_description {
2331         my $path = shift;
2332
2333         $git_dir = "$projectroot/$path";
2334         open my $fd, '<', "$git_dir/description"
2335                 or return git_get_project_config('description');
2336         my $descr = <$fd>;
2337         close $fd;
2338         if (defined $descr) {
2339                 chomp $descr;
2340         }
2341         return $descr;
2342 }
2343
2344 sub git_get_project_ctags {
2345         my $path = shift;
2346         my $ctags = {};
2347
2348         $git_dir = "$projectroot/$path";
2349         opendir my $dh, "$git_dir/ctags"
2350                 or return $ctags;
2351         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2352                 open my $ct, '<', $_ or next;
2353                 my $val = <$ct>;
2354                 chomp $val;
2355                 close $ct;
2356                 my $ctag = $_; $ctag =~ s#.*/##;
2357                 $ctags->{$ctag} = $val;
2358         }
2359         closedir $dh;
2360         $ctags;
2361 }
2362
2363 sub git_populate_project_tagcloud {
2364         my $ctags = shift;
2365
2366         # First, merge different-cased tags; tags vote on casing
2367         my %ctags_lc;
2368         foreach (keys %$ctags) {
2369                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2370                 if (not $ctags_lc{lc $_}->{topcount}
2371                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2372                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2373                         $ctags_lc{lc $_}->{topname} = $_;
2374                 }
2375         }
2376
2377         my $cloud;
2378         if (eval { require HTML::TagCloud; 1; }) {
2379                 $cloud = HTML::TagCloud->new;
2380                 foreach (sort keys %ctags_lc) {
2381                         # Pad the title with spaces so that the cloud looks
2382                         # less crammed.
2383                         my $title = $ctags_lc{$_}->{topname};
2384                         $title =~ s/ /&nbsp;/g;
2385                         $title =~ s/^/&nbsp;/g;
2386                         $title =~ s/$/&nbsp;/g;
2387                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2388                 }
2389         } else {
2390                 $cloud = \%ctags_lc;
2391         }
2392         $cloud;
2393 }
2394
2395 sub git_show_project_tagcloud {
2396         my ($cloud, $count) = @_;
2397         print STDERR ref($cloud)."..\n";
2398         if (ref $cloud eq 'HTML::TagCloud') {
2399                 return $cloud->html_and_css($count);
2400         } else {
2401                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2402                 return '<p align="center">' . join (', ', map {
2403                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2404                 } splice(@tags, 0, $count)) . '</p>';
2405         }
2406 }
2407
2408 sub git_get_project_url_list {
2409         my $path = shift;
2410
2411         $git_dir = "$projectroot/$path";
2412         open my $fd, '<', "$git_dir/cloneurl"
2413                 or return wantarray ?
2414                 @{ config_to_multi(git_get_project_config('url')) } :
2415                    config_to_multi(git_get_project_config('url'));
2416         my @git_project_url_list = map { chomp; $_ } <$fd>;
2417         close $fd;
2418
2419         return wantarray ? @git_project_url_list : \@git_project_url_list;
2420 }
2421
2422 sub git_get_projects_list {
2423         my ($filter) = @_;
2424         my @list;
2425
2426         $filter ||= '';
2427         $filter =~ s/\.git$//;
2428
2429         my $check_forks = gitweb_check_feature('forks');
2430
2431         if (-d $projects_list) {
2432                 # search in directory
2433                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2434                 # remove the trailing "/"
2435                 $dir =~ s!/+$!!;
2436                 my $pfxlen = length("$dir");
2437                 my $pfxdepth = ($dir =~ tr!/!!);
2438
2439                 File::Find::find({
2440                         follow_fast => 1, # follow symbolic links
2441                         follow_skip => 2, # ignore duplicates
2442                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2443                         wanted => sub {
2444                                 # skip project-list toplevel, if we get it.
2445                                 return if (m!^[/.]$!);
2446                                 # only directories can be git repositories
2447                                 return unless (-d $_);
2448                                 # don't traverse too deep (Find is super slow on os x)
2449                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2450                                         $File::Find::prune = 1;
2451                                         return;
2452                                 }
2453
2454                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2455                                 # we check related file in $projectroot
2456                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2457                                 if (check_export_ok("$projectroot/$path")) {
2458                                         push @list, { path => $path };
2459                                         $File::Find::prune = 1;
2460                                 }
2461                         },
2462                 }, "$dir");
2463
2464         } elsif (-f $projects_list) {
2465                 # read from file(url-encoded):
2466                 # 'git%2Fgit.git Linus+Torvalds'
2467                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2468                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2469                 my %paths;
2470                 open my $fd, '<', $projects_list or return;
2471         PROJECT:
2472                 while (my $line = <$fd>) {
2473                         chomp $line;
2474                         my ($path, $owner) = split ' ', $line;
2475                         $path = unescape($path);
2476                         $owner = unescape($owner);
2477                         if (!defined $path) {
2478                                 next;
2479                         }
2480                         if ($filter ne '') {
2481                                 # looking for forks;
2482                                 my $pfx = substr($path, 0, length($filter));
2483                                 if ($pfx ne $filter) {
2484                                         next PROJECT;
2485                                 }
2486                                 my $sfx = substr($path, length($filter));
2487                                 if ($sfx !~ /^\/.*\.git$/) {
2488                                         next PROJECT;
2489                                 }
2490                         } elsif ($check_forks) {
2491                         PATH:
2492                                 foreach my $filter (keys %paths) {
2493                                         # looking for forks;
2494                                         my $pfx = substr($path, 0, length($filter));
2495                                         if ($pfx ne $filter) {
2496                                                 next PATH;
2497                                         }
2498                                         my $sfx = substr($path, length($filter));
2499                                         if ($sfx !~ /^\/.*\.git$/) {
2500                                                 next PATH;
2501                                         }
2502                                         # is a fork, don't include it in
2503                                         # the list
2504                                         next PROJECT;
2505                                 }
2506                         }
2507                         if (check_export_ok("$projectroot/$path")) {
2508                                 my $pr = {
2509                                         path => $path,
2510                                         owner => to_utf8($owner),
2511                                 };
2512                                 push @list, $pr;
2513                                 (my $forks_path = $path) =~ s/\.git$//;
2514                                 $paths{$forks_path}++;
2515                         }
2516                 }
2517                 close $fd;
2518         }
2519         return @list;
2520 }
2521
2522 our $gitweb_project_owner = undef;
2523 sub git_get_project_list_from_file {
2524
2525         return if (defined $gitweb_project_owner);
2526
2527         $gitweb_project_owner = {};
2528         # read from file (url-encoded):
2529         # 'git%2Fgit.git Linus+Torvalds'
2530         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2531         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2532         if (-f $projects_list) {
2533                 open(my $fd, '<', $projects_list);
2534                 while (my $line = <$fd>) {
2535                         chomp $line;
2536                         my ($pr, $ow) = split ' ', $line;
2537                         $pr = unescape($pr);
2538                         $ow = unescape($ow);
2539                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2540                 }
2541                 close $fd;
2542         }
2543 }
2544
2545 sub git_get_project_owner {
2546         my $project = shift;
2547         my $owner;
2548
2549         return undef unless $project;
2550         $git_dir = "$projectroot/$project";
2551
2552         if (!defined $gitweb_project_owner) {
2553                 git_get_project_list_from_file();
2554         }
2555
2556         if (exists $gitweb_project_owner->{$project}) {
2557                 $owner = $gitweb_project_owner->{$project};
2558         }
2559         if (!defined $owner){
2560                 $owner = git_get_project_config('owner');
2561         }
2562         if (!defined $owner) {
2563                 $owner = get_file_owner("$git_dir");
2564         }
2565
2566         return $owner;
2567 }
2568
2569 sub git_get_last_activity {
2570         my ($path) = @_;
2571         my $fd;
2572
2573         $git_dir = "$projectroot/$path";
2574         open($fd, "-|", git_cmd(), 'for-each-ref',
2575              '--format=%(committer)',
2576              '--sort=-committerdate',
2577              '--count=1',
2578              'refs/heads') or return;
2579         my $most_recent = <$fd>;
2580         close $fd or return;
2581         if (defined $most_recent &&
2582             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2583                 my $timestamp = $1;
2584                 my $age = time - $timestamp;
2585                 return ($age, age_string($age));
2586         }
2587         return (undef, undef);
2588 }
2589
2590 sub git_get_references {
2591         my $type = shift || "";
2592         my %refs;
2593         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2594         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2595         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2596                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2597                 or return;
2598
2599         while (my $line = <$fd>) {
2600                 chomp $line;
2601                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2602                         if (defined $refs{$1}) {
2603                                 push @{$refs{$1}}, $2;
2604                         } else {
2605                                 $refs{$1} = [ $2 ];
2606                         }
2607                 }
2608         }
2609         close $fd or return;
2610         return \%refs;
2611 }
2612
2613 sub git_get_rev_name_tags {
2614         my $hash = shift || return undef;
2615
2616         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2617                 or return;
2618         my $name_rev = <$fd>;
2619         close $fd;
2620
2621         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2622                 return $1;
2623         } else {
2624                 # catches also '$hash undefined' output
2625                 return undef;
2626         }
2627 }
2628
2629 ## ----------------------------------------------------------------------
2630 ## parse to hash functions
2631
2632 sub parse_date {
2633         my $epoch = shift;
2634         my $tz = shift || "-0000";
2635
2636         my %date;
2637         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2638         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2639         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2640         $date{'hour'} = $hour;
2641         $date{'minute'} = $min;
2642         $date{'mday'} = $mday;
2643         $date{'day'} = $days[$wday];
2644         $date{'month'} = $months[$mon];
2645         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2646                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2647         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2648                              $mday, $months[$mon], $hour ,$min;
2649         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2650                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2651
2652         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2653         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2654         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2655         $date{'hour_local'} = $hour;
2656         $date{'minute_local'} = $min;
2657         $date{'tz_local'} = $tz;
2658         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2659                                   1900+$year, $mon+1, $mday,
2660                                   $hour, $min, $sec, $tz);
2661         return %date;
2662 }
2663
2664 sub parse_tag {
2665         my $tag_id = shift;
2666         my %tag;
2667         my @comment;
2668
2669         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2670         $tag{'id'} = $tag_id;
2671         while (my $line = <$fd>) {
2672                 chomp $line;
2673                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2674                         $tag{'object'} = $1;
2675                 } elsif ($line =~ m/^type (.+)$/) {
2676                         $tag{'type'} = $1;
2677                 } elsif ($line =~ m/^tag (.+)$/) {
2678                         $tag{'name'} = $1;
2679                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2680                         $tag{'author'} = $1;
2681                         $tag{'author_epoch'} = $2;
2682                         $tag{'author_tz'} = $3;
2683                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2684                                 $tag{'author_name'}  = $1;
2685                                 $tag{'author_email'} = $2;
2686                         } else {
2687                                 $tag{'author_name'} = $tag{'author'};
2688                         }
2689                 } elsif ($line =~ m/--BEGIN/) {
2690                         push @comment, $line;
2691                         last;
2692                 } elsif ($line eq "") {
2693                         last;
2694                 }
2695         }
2696         push @comment, <$fd>;
2697         $tag{'comment'} = \@comment;
2698         close $fd or return;
2699         if (!defined $tag{'name'}) {
2700                 return
2701         };
2702         return %tag
2703 }
2704
2705 sub parse_commit_text {
2706         my ($commit_text, $withparents) = @_;
2707         my @commit_lines = split '\n', $commit_text;
2708         my %co;
2709
2710         pop @commit_lines; # Remove '\0'
2711
2712         if (! @commit_lines) {
2713                 return;
2714         }
2715
2716         my $header = shift @commit_lines;
2717         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2718                 return;
2719         }
2720         ($co{'id'}, my @parents) = split ' ', $header;
2721         while (my $line = shift @commit_lines) {
2722                 last if $line eq "\n";
2723                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2724                         $co{'tree'} = $1;
2725                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2726                         push @parents, $1;
2727                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2728                         $co{'author'} = to_utf8($1);
2729                         $co{'author_epoch'} = $2;
2730                         $co{'author_tz'} = $3;
2731                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2732                                 $co{'author_name'}  = $1;
2733                                 $co{'author_email'} = $2;
2734                         } else {
2735                                 $co{'author_name'} = $co{'author'};
2736                         }
2737                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2738                         $co{'committer'} = to_utf8($1);
2739                         $co{'committer_epoch'} = $2;
2740                         $co{'committer_tz'} = $3;
2741                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2742                                 $co{'committer_name'}  = $1;
2743                                 $co{'committer_email'} = $2;
2744                         } else {
2745                                 $co{'committer_name'} = $co{'committer'};
2746                         }
2747                 }
2748         }
2749         if (!defined $co{'tree'}) {
2750                 return;
2751         };
2752         $co{'parents'} = \@parents;
2753         $co{'parent'} = $parents[0];
2754
2755         foreach my $title (@commit_lines) {
2756                 $title =~ s/^    //;
2757                 if ($title ne "") {
2758                         $co{'title'} = chop_str($title, 80, 5);
2759                         # remove leading stuff of merges to make the interesting part visible
2760                         if (length($title) > 50) {
2761                                 $title =~ s/^Automatic //;
2762                                 $title =~ s/^merge (of|with) /Merge ... /i;
2763                                 if (length($title) > 50) {
2764                                         $title =~ s/(http|rsync):\/\///;
2765                                 }
2766                                 if (length($title) > 50) {
2767                                         $title =~ s/(master|www|rsync)\.//;
2768                                 }
2769                                 if (length($title) > 50) {
2770                                         $title =~ s/kernel.org:?//;
2771                                 }
2772                                 if (length($title) > 50) {
2773                                         $title =~ s/\/pub\/scm//;
2774                                 }
2775                         }
2776                         $co{'title_short'} = chop_str($title, 50, 5);
2777                         last;
2778                 }
2779         }
2780         if (! defined $co{'title'} || $co{'title'} eq "") {
2781                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2782         }
2783         # remove added spaces
2784         foreach my $line (@commit_lines) {
2785                 $line =~ s/^    //;
2786         }
2787         $co{'comment'} = \@commit_lines;
2788
2789         my $age = time - $co{'committer_epoch'};
2790         $co{'age'} = $age;
2791         $co{'age_string'} = age_string($age);
2792         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2793         if ($age > 60*60*24*7*2) {
2794                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2795                 $co{'age_string_age'} = $co{'age_string'};
2796         } else {
2797                 $co{'age_string_date'} = $co{'age_string'};
2798                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2799         }
2800         return %co;
2801 }
2802
2803 sub parse_commit {
2804         my ($commit_id) = @_;
2805         my %co;
2806
2807         local $/ = "\0";
2808
2809         open my $fd, "-|", git_cmd(), "rev-list",
2810                 "--parents",
2811                 "--header",
2812                 "--max-count=1",
2813                 $commit_id,
2814                 "--",
2815                 or die_error(500, "Open git-rev-list failed");
2816         %co = parse_commit_text(<$fd>, 1);
2817         close $fd;
2818
2819         return %co;
2820 }
2821
2822 sub parse_commits {
2823         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2824         my @cos;
2825
2826         $maxcount ||= 1;
2827         $skip ||= 0;
2828
2829         local $/ = "\0";
2830
2831         open my $fd, "-|", git_cmd(), "rev-list",
2832                 "--header",
2833                 @args,
2834                 ("--max-count=" . $maxcount),
2835                 ("--skip=" . $skip),
2836                 @extra_options,
2837                 $commit_id,
2838                 "--",
2839                 ($filename ? ($filename) : ())
2840                 or die_error(500, "Open git-rev-list failed");
2841         while (my $line = <$fd>) {
2842                 my %co = parse_commit_text($line);
2843                 push @cos, \%co;
2844         }
2845         close $fd;
2846
2847         return wantarray ? @cos : \@cos;
2848 }
2849
2850 # parse line of git-diff-tree "raw" output
2851 sub parse_difftree_raw_line {
2852         my $line = shift;
2853         my %res;
2854
2855         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2856         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2857         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2858                 $res{'from_mode'} = $1;
2859                 $res{'to_mode'} = $2;
2860                 $res{'from_id'} = $3;
2861                 $res{'to_id'} = $4;
2862                 $res{'status'} = $5;
2863                 $res{'similarity'} = $6;
2864                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2865                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2866                 } else {
2867                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2868                 }
2869         }
2870         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2871         # combined diff (for merge commit)
2872         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2873                 $res{'nparents'}  = length($1);
2874                 $res{'from_mode'} = [ split(' ', $2) ];
2875                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2876                 $res{'from_id'} = [ split(' ', $3) ];
2877                 $res{'to_id'} = pop @{$res{'from_id'}};
2878                 $res{'status'} = [ split('', $4) ];
2879                 $res{'to_file'} = unquote($5);
2880         }
2881         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2882         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2883                 $res{'commit'} = $1;
2884         }
2885
2886         return wantarray ? %res : \%res;
2887 }
2888
2889 # wrapper: return parsed line of git-diff-tree "raw" output
2890 # (the argument might be raw line, or parsed info)
2891 sub parsed_difftree_line {
2892         my $line_or_ref = shift;
2893
2894         if (ref($line_or_ref) eq "HASH") {
2895                 # pre-parsed (or generated by hand)
2896                 return $line_or_ref;
2897         } else {
2898                 return parse_difftree_raw_line($line_or_ref);
2899         }
2900 }
2901
2902 # parse line of git-ls-tree output
2903 sub parse_ls_tree_line {
2904         my $line = shift;
2905         my %opts = @_;
2906         my %res;
2907
2908         if ($opts{'-l'}) {
2909                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2910                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2911
2912                 $res{'mode'} = $1;
2913                 $res{'type'} = $2;
2914                 $res{'hash'} = $3;
2915                 $res{'size'} = $4;
2916                 if ($opts{'-z'}) {
2917                         $res{'name'} = $5;
2918                 } else {
2919                         $res{'name'} = unquote($5);
2920                 }
2921         } else {
2922                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2923                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2924
2925                 $res{'mode'} = $1;
2926                 $res{'type'} = $2;
2927                 $res{'hash'} = $3;
2928                 if ($opts{'-z'}) {
2929                         $res{'name'} = $4;
2930                 } else {
2931                         $res{'name'} = unquote($4);
2932                 }
2933         }
2934
2935         return wantarray ? %res : \%res;
2936 }
2937
2938 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2939 sub parse_from_to_diffinfo {
2940         my ($diffinfo, $from, $to, @parents) = @_;
2941
2942         if ($diffinfo->{'nparents'}) {
2943                 # combined diff
2944                 $from->{'file'} = [];
2945                 $from->{'href'} = [];
2946                 fill_from_file_info($diffinfo, @parents)
2947                         unless exists $diffinfo->{'from_file'};
2948                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2949                         $from->{'file'}[$i] =
2950                                 defined $diffinfo->{'from_file'}[$i] ?
2951                                         $diffinfo->{'from_file'}[$i] :
2952                                         $diffinfo->{'to_file'};
2953                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2954                                 $from->{'href'}[$i] = href(action=>"blob",
2955                                                            hash_base=>$parents[$i],
2956                                                            hash=>$diffinfo->{'from_id'}[$i],
2957                                                            file_name=>$from->{'file'}[$i]);
2958                         } else {
2959                                 $from->{'href'}[$i] = undef;
2960                         }
2961                 }
2962         } else {
2963                 # ordinary (not combined) diff
2964                 $from->{'file'} = $diffinfo->{'from_file'};
2965                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2966                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2967                                                hash=>$diffinfo->{'from_id'},
2968                                                file_name=>$from->{'file'});
2969                 } else {
2970                         delete $from->{'href'};
2971                 }
2972         }
2973
2974         $to->{'file'} = $diffinfo->{'to_file'};
2975         if (!is_deleted($diffinfo)) { # file exists in result
2976                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2977                                      hash=>$diffinfo->{'to_id'},
2978                                      file_name=>$to->{'file'});
2979         } else {
2980                 delete $to->{'href'};
2981         }
2982 }
2983
2984 ## ......................................................................
2985 ## parse to array of hashes functions
2986
2987 sub git_get_heads_list {
2988         my $limit = shift;
2989         my @headslist;
2990
2991         open my $fd, '-|', git_cmd(), 'for-each-ref',
2992                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2993                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2994                 'refs/heads'
2995                 or return;
2996         while (my $line = <$fd>) {
2997                 my %ref_item;
2998
2999                 chomp $line;
3000                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3001                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3002                 my ($committer, $epoch, $tz) =
3003                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3004                 $ref_item{'fullname'}  = $name;
3005                 $name =~ s!^refs/heads/!!;
3006
3007                 $ref_item{'name'}  = $name;
3008                 $ref_item{'id'}    = $hash;
3009                 $ref_item{'title'} = $title || '(no commit message)';
3010                 $ref_item{'epoch'} = $epoch;
3011                 if ($epoch) {
3012                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3013                 } else {
3014                         $ref_item{'age'} = "unknown";
3015                 }
3016
3017                 push @headslist, \%ref_item;
3018         }
3019         close $fd;
3020
3021         return wantarray ? @headslist : \@headslist;
3022 }
3023
3024 sub git_get_tags_list {
3025         my $limit = shift;
3026         my @tagslist;
3027
3028         open my $fd, '-|', git_cmd(), 'for-each-ref',
3029                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3030                 '--format=%(objectname) %(objecttype) %(refname) '.
3031                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3032                 'refs/tags'
3033                 or return;
3034         while (my $line = <$fd>) {
3035                 my %ref_item;
3036
3037                 chomp $line;
3038                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3039                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3040                 my ($creator, $epoch, $tz) =
3041                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3042                 $ref_item{'fullname'} = $name;
3043                 $name =~ s!^refs/tags/!!;
3044
3045                 $ref_item{'type'} = $type;
3046                 $ref_item{'id'} = $id;
3047                 $ref_item{'name'} = $name;
3048                 if ($type eq "tag") {
3049                         $ref_item{'subject'} = $title;
3050                         $ref_item{'reftype'} = $reftype;
3051                         $ref_item{'refid'}   = $refid;
3052                 } else {
3053                         $ref_item{'reftype'} = $type;
3054                         $ref_item{'refid'}   = $id;
3055                 }
3056
3057                 if ($type eq "tag" || $type eq "commit") {
3058                         $ref_item{'epoch'} = $epoch;
3059                         if ($epoch) {
3060                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3061                         } else {
3062                                 $ref_item{'age'} = "unknown";
3063                         }
3064                 }
3065
3066                 push @tagslist, \%ref_item;
3067         }
3068         close $fd;
3069
3070         return wantarray ? @tagslist : \@tagslist;
3071 }
3072
3073 ## ----------------------------------------------------------------------
3074 ## filesystem-related functions
3075
3076 sub get_file_owner {
3077         my $path = shift;
3078
3079         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3080         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3081         if (!defined $gcos) {
3082                 return undef;
3083         }
3084         my $owner = $gcos;
3085         $owner =~ s/[,;].*$//;
3086         return to_utf8($owner);
3087 }
3088
3089 # assume that file exists
3090 sub insert_file {
3091         my $filename = shift;
3092
3093         open my $fd, '<', $filename;
3094         print map { to_utf8($_) } <$fd>;
3095         close $fd;
3096 }
3097
3098 ## ......................................................................
3099 ## mimetype related functions
3100
3101 sub mimetype_guess_file {
3102         my $filename = shift;
3103         my $mimemap = shift;
3104         -r $mimemap or return undef;
3105
3106         my %mimemap;
3107         open(my $mh, '<', $mimemap) or return undef;
3108         while (<$mh>) {
3109                 next if m/^#/; # skip comments
3110                 my ($mimetype, $exts) = split(/\t+/);
3111                 if (defined $exts) {
3112                         my @exts = split(/\s+/, $exts);
3113                         foreach my $ext (@exts) {
3114                                 $mimemap{$ext} = $mimetype;
3115                         }
3116                 }
3117         }
3118         close($mh);
3119
3120         $filename =~ /\.([^.]*)$/;
3121         return $mimemap{$1};
3122 }
3123
3124 sub mimetype_guess {
3125         my $filename = shift;
3126         my $mime;
3127         $filename =~ /\./ or return undef;
3128
3129         if ($mimetypes_file) {
3130                 my $file = $mimetypes_file;
3131                 if ($file !~ m!^/!) { # if it is relative path
3132                         # it is relative to project
3133                         $file = "$projectroot/$project/$file";
3134                 }
3135                 $mime = mimetype_guess_file($filename, $file);
3136         }
3137         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3138         return $mime;
3139 }
3140
3141 sub blob_mimetype {
3142         my $fd = shift;
3143         my $filename = shift;
3144
3145         if ($filename) {
3146                 my $mime = mimetype_guess($filename);
3147                 $mime and return $mime;
3148         }
3149
3150         # just in case
3151         return $default_blob_plain_mimetype unless $fd;
3152
3153         if (-T $fd) {
3154                 return 'text/plain';
3155         } elsif (! $filename) {
3156                 return 'application/octet-stream';
3157         } elsif ($filename =~ m/\.png$/i) {
3158                 return 'image/png';
3159         } elsif ($filename =~ m/\.gif$/i) {
3160                 return 'image/gif';
3161         } elsif ($filename =~ m/\.jpe?g$/i) {
3162                 return 'image/jpeg';
3163         } else {
3164                 return 'application/octet-stream';
3165         }
3166 }
3167
3168 sub blob_contenttype {
3169         my ($fd, $file_name, $type) = @_;
3170
3171         $type ||= blob_mimetype($fd, $file_name);
3172         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3173                 $type .= "; charset=$default_text_plain_charset";
3174         }
3175
3176         return $type;
3177 }
3178
3179 ## ======================================================================
3180 ## functions printing HTML: header, footer, error page
3181
3182 sub get_page_title {
3183         my $title = to_utf8($site_name);
3184
3185         return $title unless (defined $project);
3186         $title .= " - " . to_utf8($project);
3187
3188         return $title unless (defined $action);
3189         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3190
3191         return $title unless (defined $file_name);
3192         $title .= " - " . esc_path($file_name);
3193         if ($action eq "tree" && $file_name !~ m|/$|) {
3194                 $title .= "/";
3195         }
3196
3197         return $title;
3198 }
3199
3200 sub git_header_html {
3201         my $status = shift || "200 OK";
3202         my $expires = shift;
3203         my %opts = @_;
3204
3205         my $title = get_page_title();
3206         my $content_type;
3207         # require explicit support from the UA if we are to send the page as
3208         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3209         # we have to do this because MSIE sometimes globs '*/*', pretending to
3210         # support xhtml+xml but choking when it gets what it asked for.
3211         if (defined $cgi->http('HTTP_ACCEPT') &&
3212             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3213             $cgi->Accept('application/xhtml+xml') != 0) {
3214                 $content_type = 'application/xhtml+xml';
3215         } else {
3216                 $content_type = 'text/html';
3217         }
3218         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3219                            -status=> $status, -expires => $expires)
3220                 unless ($opts{'-no_http_headers'});
3221         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3222         print <<EOF;
3223 <?xml version="1.0" encoding="utf-8"?>
3224 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3225 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3226 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3227 <!-- git core binaries version $git_version -->
3228 <head>
3229 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3230 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3231 <meta name="robots" content="index, nofollow"/>
3232 <title>$title</title>
3233 EOF
3234         # the stylesheet, favicon etc urls won't work correctly with path_info
3235         # unless we set the appropriate base URL
3236         if ($ENV{'PATH_INFO'}) {
3237                 print "<base href=\"".esc_url($base_url)."\" />\n";
3238         }
3239         # print out each stylesheet that exist, providing backwards capability
3240         # for those people who defined $stylesheet in a config file
3241         if (defined $stylesheet) {
3242                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3243         } else {
3244                 foreach my $stylesheet (@stylesheets) {
3245                         next unless $stylesheet;
3246                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3247                 }
3248         }
3249         if (defined $project) {
3250                 my %href_params = get_feed_info();
3251                 if (!exists $href_params{'-title'}) {
3252                         $href_params{'-title'} = 'log';
3253                 }
3254
3255                 foreach my $format qw(RSS Atom) {
3256                         my $type = lc($format);
3257                         my %link_attr = (
3258                                 '-rel' => 'alternate',
3259                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3260                                 '-type' => "application/$type+xml"
3261                         );
3262
3263                         $href_params{'action'} = $type;
3264                         $link_attr{'-href'} = href(%href_params);
3265                         print "<link ".
3266                               "rel=\"$link_attr{'-rel'}\" ".
3267                               "title=\"$link_attr{'-title'}\" ".
3268                               "href=\"$link_attr{'-href'}\" ".
3269                               "type=\"$link_attr{'-type'}\" ".
3270                               "/>\n";
3271
3272                         $href_params{'extra_options'} = '--no-merges';
3273                         $link_attr{'-href'} = href(%href_params);
3274                         $link_attr{'-title'} .= ' (no merges)';
3275                         print "<link ".
3276                               "rel=\"$link_attr{'-rel'}\" ".
3277                               "title=\"$link_attr{'-title'}\" ".
3278                               "href=\"$link_attr{'-href'}\" ".
3279                               "type=\"$link_attr{'-type'}\" ".
3280                               "/>\n";
3281                 }
3282
3283         } else {
3284                 printf('<link rel="alternate" title="%s projects list" '.
3285                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3286                        $site_name, href(project=>undef, action=>"project_index"));
3287                 printf('<link rel="alternate" title="%s projects feeds" '.
3288                        'href="%s" type="text/x-opml" />'."\n",
3289                        $site_name, href(project=>undef, action=>"opml"));
3290         }
3291         if (defined $favicon) {
3292                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3293         }
3294
3295         print "</head>\n" .
3296               "<body>\n";
3297
3298         if (defined $site_header && -f $site_header) {
3299                 insert_file($site_header);
3300         }
3301
3302         print "<div class=\"page_header\">\n" .
3303               $cgi->a({-href => esc_url($logo_url),
3304                        -title => $logo_label},
3305                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3306         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3307         if (defined $project) {
3308                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3309                 if (defined $action) {
3310                         print " / $action";
3311                 }
3312                 print "\n";
3313         }
3314         print "</div>\n";
3315
3316         my $have_search = gitweb_check_feature('search');
3317         if (defined $project && $have_search) {
3318                 if (!defined $searchtext) {
3319                         $searchtext = "";
3320                 }
3321                 my $search_hash;
3322                 if (defined $hash_base) {
3323                         $search_hash = $hash_base;
3324                 } elsif (defined $hash) {
3325                         $search_hash = $hash;
3326                 } else {
3327                         $search_hash = "HEAD";
3328                 }
3329                 my $action = $my_uri;
3330                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3331                 if ($use_pathinfo) {
3332                         $action .= "/".esc_url($project);
3333                 }
3334                 print $cgi->startform(-method => "get", -action => $action) .
3335                       "<div class=\"search\">\n" .
3336                       (!$use_pathinfo &&
3337                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3338                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3339                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3340                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3341                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3342                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3343                       " search:\n",
3344                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3345                       "<span title=\"Extended regular expression\">" .
3346                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3347                                      -checked => $search_use_regexp) .
3348                       "</span>" .
3349                       "</div>" .
3350                       $cgi->end_form() . "\n";
3351         }
3352 }
3353
3354 sub git_footer_html {
3355         my $feed_class = 'rss_logo';
3356
3357         print "<div class=\"page_footer\">\n";
3358         if (defined $project) {
3359                 my $descr = git_get_project_description($project);
3360                 if (defined $descr) {
3361                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3362                 }
3363
3364                 my %href_params = get_feed_info();
3365                 if (!%href_params) {
3366                         $feed_class .= ' generic';
3367                 }
3368                 $href_params{'-title'} ||= 'log';
3369
3370                 foreach my $format qw(RSS Atom) {
3371                         $href_params{'action'} = lc($format);
3372                         print $cgi->a({-href => href(%href_params),
3373                                       -title => "$href_params{'-title'} $format feed",
3374                                       -class => $feed_class}, $format)."\n";
3375                 }
3376
3377         } else {
3378                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3379                               -class => $feed_class}, "OPML") . " ";
3380                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3381                               -class => $feed_class}, "TXT") . "\n";
3382         }
3383         print "</div>\n"; # class="page_footer"
3384
3385         if (defined $t0 && gitweb_check_feature('timed')) {
3386                 print "<div id=\"generating_info\">\n";
3387                 print 'This page took '.
3388                       '<span id="generating_time" class="time_span">'.
3389                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3390                       ' seconds </span>'.
3391                       ' and '.
3392                       '<span id="generating_cmd">'.
3393                       $number_of_git_cmds.
3394                       '</span> git commands '.
3395                       " to generate.\n";
3396                 print "</div>\n"; # class="page_footer"
3397         }
3398
3399         if (defined $site_footer && -f $site_footer) {
3400                 insert_file($site_footer);
3401         }
3402
3403         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3404         if (defined $action &&
3405             $action eq 'blame_incremental') {
3406                 print qq!<script type="text/javascript">\n!.
3407                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3408                       qq!           "!. href() .qq!");\n!.
3409                       qq!</script>\n!;
3410         } elsif (gitweb_check_feature('javascript-actions')) {
3411                 print qq!<script type="text/javascript">\n!.
3412                       qq!window.onload = fixLinks;\n!.
3413                       qq!</script>\n!;
3414         }
3415
3416         print "</body>\n" .
3417               "</html>";
3418 }
3419
3420 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3421 # Example: die_error(404, 'Hash not found')
3422 # By convention, use the following status codes (as defined in RFC 2616):
3423 # 400: Invalid or missing CGI parameters, or
3424 #      requested object exists but has wrong type.
3425 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3426 #      this server or project.
3427 # 404: Requested object/revision/project doesn't exist.
3428 # 500: The server isn't configured properly, or
3429 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3430 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3431 # 503: The server is currently unavailable (because it is overloaded,
3432 #      or down for maintenance).  Generally, this is a temporary state.
3433 sub die_error {
3434         my $status = shift || 500;
3435         my $error = esc_html(shift) || "Internal Server Error";
3436         my $extra = shift;
3437         my %opts = @_;
3438
3439         my %http_responses = (
3440                 400 => '400 Bad Request',
3441                 403 => '403 Forbidden',
3442                 404 => '404 Not Found',
3443                 500 => '500 Internal Server Error',
3444                 503 => '503 Service Unavailable',
3445         );
3446         git_header_html($http_responses{$status}, undef, %opts);
3447         print <<EOF;
3448 <div class="page_body">
3449 <br /><br />
3450 $status - $error
3451 <br />
3452 EOF
3453         if (defined $extra) {
3454                 print "<hr />\n" .
3455                       "$extra\n";
3456         }
3457         print "</div>\n";
3458
3459         git_footer_html();
3460         goto DONE_GITWEB
3461                 unless ($opts{'-error_handler'});
3462 }
3463
3464 ## ----------------------------------------------------------------------
3465 ## functions printing or outputting HTML: navigation
3466
3467 sub git_print_page_nav {
3468         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3469         $extra = '' if !defined $extra; # pager or formats
3470
3471         my @navs = qw(summary shortlog log commit commitdiff tree);
3472         if ($suppress) {
3473                 @navs = grep { $_ ne $suppress } @navs;
3474         }
3475
3476         my %arg = map { $_ => {action=>$_} } @navs;
3477         if (defined $head) {
3478                 for (qw(commit commitdiff)) {
3479                         $arg{$_}{'hash'} = $head;
3480                 }
3481                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3482                         for (qw(shortlog log)) {
3483                                 $arg{$_}{'hash'} = $head;
3484                         }
3485                 }
3486         }
3487
3488         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3489         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3490
3491         my @actions = gitweb_get_feature('actions');
3492         my %repl = (
3493                 '%' => '%',
3494                 'n' => $project,         # project name
3495                 'f' => $git_dir,         # project path within filesystem
3496                 'h' => $treehead || '',  # current hash ('h' parameter)
3497                 'b' => $treebase || '',  # hash base ('hb' parameter)
3498         );
3499         while (@actions) {
3500                 my ($label, $link, $pos) = splice(@actions,0,3);
3501                 # insert
3502                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3503                 # munch munch
3504                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3505                 $arg{$label}{'_href'} = $link;
3506         }
3507
3508         print "<div class=\"page_nav\">\n" .
3509                 (join " | ",
3510                  map { $_ eq $current ?
3511                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3512                  } @navs);
3513         print "<br/>\n$extra<br/>\n" .
3514               "</div>\n";
3515 }
3516
3517 sub format_paging_nav {
3518         my ($action, $page, $has_next_link) = @_;
3519         my $paging_nav;
3520
3521
3522         if ($page > 0) {
3523                 $paging_nav .=
3524                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3525                         " &sdot; " .
3526                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3527                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3528         } else {
3529                 $paging_nav .= "first &sdot; prev";
3530         }
3531
3532         if ($has_next_link) {
3533                 $paging_nav .= " &sdot; " .
3534                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3535                                  -accesskey => "n", -title => "Alt-n"}, "next");
3536         } else {
3537                 $paging_nav .= " &sdot; next";
3538         }
3539
3540         return $paging_nav;
3541 }
3542
3543 ## ......................................................................
3544 ## functions printing or outputting HTML: div
3545
3546 sub git_print_header_div {
3547         my ($action, $title, $hash, $hash_base) = @_;
3548         my %args = ();
3549
3550         $args{'action'} = $action;
3551         $args{'hash'} = $hash if $hash;
3552         $args{'hash_base'} = $hash_base if $hash_base;
3553
3554         print "<div class=\"header\">\n" .
3555               $cgi->a({-href => href(%args), -class => "title"},
3556               $title ? $title : $action) .
3557               "\n</div>\n";
3558 }
3559
3560 sub print_local_time {
3561         print format_local_time(@_);
3562 }
3563
3564 sub format_local_time {
3565         my $localtime = '';
3566         my %date = @_;
3567         if ($date{'hour_local'} < 6) {
3568                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3569                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3570         } else {
3571                 $localtime .= sprintf(" (%02d:%02d %s)",
3572                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3573         }
3574
3575         return $localtime;
3576 }
3577
3578 # Outputs the author name and date in long form
3579 sub git_print_authorship {
3580         my $co = shift;
3581         my %opts = @_;
3582         my $tag = $opts{-tag} || 'div';
3583         my $author = $co->{'author_name'};
3584
3585         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3586         print "<$tag class=\"author_date\">" .
3587               format_search_author($author, "author", esc_html($author)) .
3588               " [$ad{'rfc2822'}";
3589         print_local_time(%ad) if ($opts{-localtime});
3590         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3591                   . "</$tag>\n";
3592 }
3593
3594 # Outputs table rows containing the full author or committer information,
3595 # in the format expected for 'commit' view (& similia).
3596 # Parameters are a commit hash reference, followed by the list of people
3597 # to output information for. If the list is empty it defalts to both
3598 # author and committer.
3599 sub git_print_authorship_rows {
3600         my $co = shift;
3601         # too bad we can't use @people = @_ || ('author', 'committer')
3602         my @people = @_;
3603         @people = ('author', 'committer') unless @people;
3604         foreach my $who (@people) {
3605                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3606                 print "<tr><td>$who</td><td>" .
3607                       format_search_author($co->{"${who}_name"}, $who,
3608                                esc_html($co->{"${who}_name"})) . " " .
3609                       format_search_author($co->{"${who}_email"}, $who,
3610                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3611                       "</td><td rowspan=\"2\">" .
3612                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3613                       "</td></tr>\n" .
3614                       "<tr>" .
3615                       "<td></td><td> $wd{'rfc2822'}";
3616                 print_local_time(%wd);
3617                 print "</td>" .
3618                       "</tr>\n";
3619         }
3620 }
3621
3622 sub git_print_page_path {
3623         my $name = shift;
3624         my $type = shift;
3625         my $hb = shift;
3626
3627
3628         print "<div class=\"page_path\">";
3629         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3630                       -title => 'tree root'}, to_utf8("[$project]"));
3631         print " / ";
3632         if (defined $name) {
3633                 my @dirname = split '/', $name;
3634                 my $basename = pop @dirname;
3635                 my $fullname = '';
3636
3637                 foreach my $dir (@dirname) {
3638                         $fullname .= ($fullname ? '/' : '') . $dir;
3639                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3640                                                      hash_base=>$hb),
3641                                       -title => $fullname}, esc_path($dir));
3642                         print " / ";
3643                 }
3644                 if (defined $type && $type eq 'blob') {
3645                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3646                                                      hash_base=>$hb),
3647                                       -title => $name}, esc_path($basename));
3648                 } elsif (defined $type && $type eq 'tree') {
3649                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3650                                                      hash_base=>$hb),
3651                                       -title => $name}, esc_path($basename));
3652                         print " / ";
3653                 } else {
3654                         print esc_path($basename);
3655                 }
3656         }
3657         print "<br/></div>\n";
3658 }
3659
3660 sub git_print_log {
3661         my $log = shift;
3662         my %opts = @_;
3663
3664         if ($opts{'-remove_title'}) {
3665                 # remove title, i.e. first line of log
3666                 shift @$log;
3667         }
3668         # remove leading empty lines
3669         while (defined $log->[0] && $log->[0] eq "") {
3670                 shift @$log;
3671         }
3672
3673         # print log
3674         my $signoff = 0;
3675         my $empty = 0;
3676         foreach my $line (@$log) {
3677                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3678                         $signoff = 1;
3679                         $empty = 0;
3680                         if (! $opts{'-remove_signoff'}) {
3681                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3682                                 next;
3683                         } else {
3684                                 # remove signoff lines
3685                                 next;
3686                         }
3687                 } else {
3688                         $signoff = 0;
3689                 }
3690
3691                 # print only one empty line
3692                 # do not print empty line after signoff
3693                 if ($line eq "") {
3694                         next if ($empty || $signoff);
3695                         $empty = 1;
3696                 } else {
3697                         $empty = 0;
3698                 }
3699
3700                 print format_log_line_html($line) . "<br/>\n";
3701         }
3702
3703         if ($opts{'-final_empty_line'}) {
3704                 # end with single empty line
3705                 print "<br/>\n" unless $empty;
3706         }
3707 }
3708
3709 # return link target (what link points to)
3710 sub git_get_link_target {
3711         my $hash = shift;
3712         my $link_target;
3713
3714         # read link
3715         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3716                 or return;
3717         {
3718                 local $/ = undef;
3719                 $link_target = <$fd>;
3720         }
3721         close $fd
3722                 or return;
3723
3724         return $link_target;
3725 }
3726
3727 # given link target, and the directory (basedir) the link is in,
3728 # return target of link relative to top directory (top tree);
3729 # return undef if it is not possible (including absolute links).
3730 sub normalize_link_target {
3731         my ($link_target, $basedir) = @_;
3732
3733         # absolute symlinks (beginning with '/') cannot be normalized
3734         return if (substr($link_target, 0, 1) eq '/');
3735
3736         # normalize link target to path from top (root) tree (dir)
3737         my $path;
3738         if ($basedir) {
3739                 $path = $basedir . '/' . $link_target;
3740         } else {
3741                 # we are in top (root) tree (dir)
3742                 $path = $link_target;
3743         }
3744
3745         # remove //, /./, and /../
3746         my @path_parts;
3747         foreach my $part (split('/', $path)) {
3748                 # discard '.' and ''
3749                 next if (!$part || $part eq '.');
3750                 # handle '..'
3751                 if ($part eq '..') {
3752                         if (@path_parts) {
3753                                 pop @path_parts;
3754                         } else {
3755                                 # link leads outside repository (outside top dir)
3756                                 return;
3757                         }
3758                 } else {
3759                         push @path_parts, $part;
3760                 }
3761         }
3762         $path = join('/', @path_parts);
3763
3764         return $path;
3765 }
3766
3767 # print tree entry (row of git_tree), but without encompassing <tr> element
3768 sub git_print_tree_entry {
3769         my ($t, $basedir, $hash_base, $have_blame) = @_;
3770
3771         my %base_key = ();
3772         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3773
3774         # The format of a table row is: mode list link.  Where mode is
3775         # the mode of the entry, list is the name of the entry, an href,
3776         # and link is the action links of the entry.
3777
3778         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3779         if (exists $t->{'size'}) {
3780                 print "<td class=\"size\">$t->{'size'}</td>\n";
3781         }
3782         if ($t->{'type'} eq "blob") {
3783                 print "<td class=\"list\">" .
3784                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3785                                                file_name=>"$basedir$t->{'name'}", %base_key),
3786                                 -class => "list"}, esc_path($t->{'name'}));
3787                 if (S_ISLNK(oct $t->{'mode'})) {
3788                         my $link_target = git_get_link_target($t->{'hash'});
3789                         if ($link_target) {
3790                                 my $norm_target = normalize_link_target($link_target, $basedir);
3791                                 if (defined $norm_target) {
3792                                         print " -> " .
3793                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3794                                                                      file_name=>$norm_target),
3795                                                        -title => $norm_target}, esc_path($link_target));
3796                                 } else {
3797                                         print " -> " . esc_path($link_target);
3798                                 }
3799                         }
3800                 }
3801                 print "</td>\n";
3802                 print "<td class=\"link\">";
3803                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3804                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3805                               "blob");
3806                 if ($have_blame) {
3807                         print " | " .
3808                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3809                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3810                                       "blame");
3811                 }
3812                 if (defined $hash_base) {
3813                         print " | " .
3814                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3815                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3816                                       "history");
3817                 }
3818                 print " | " .
3819                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3820                                                file_name=>"$basedir$t->{'name'}")},
3821                                 "raw");
3822                 print "</td>\n";
3823
3824         } elsif ($t->{'type'} eq "tree") {
3825                 print "<td class=\"list\">";
3826                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3827                                              file_name=>"$basedir$t->{'name'}",
3828                                              %base_key)},
3829                               esc_path($t->{'name'}));
3830                 print "</td>\n";
3831                 print "<td class=\"link\">";
3832                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3833                                              file_name=>"$basedir$t->{'name'}",
3834                                              %base_key)},
3835                               "tree");
3836                 if (defined $hash_base) {
3837                         print " | " .
3838                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3839                                                      file_name=>"$basedir$t->{'name'}")},
3840                                       "history");
3841                 }
3842                 print "</td>\n";
3843         } else {
3844                 # unknown object: we can only present history for it
3845                 # (this includes 'commit' object, i.e. submodule support)
3846                 print "<td class=\"list\">" .
3847                       esc_path($t->{'name'}) .
3848                       "</td>\n";
3849                 print "<td class=\"link\">";
3850                 if (defined $hash_base) {
3851                         print $cgi->a({-href => href(action=>"history",
3852                                                      hash_base=>$hash_base,
3853                                                      file_name=>"$basedir$t->{'name'}")},
3854                                       "history");
3855                 }
3856                 print "</td>\n";
3857         }
3858 }
3859
3860 ## ......................................................................
3861 ## functions printing large fragments of HTML
3862
3863 # get pre-image filenames for merge (combined) diff
3864 sub fill_from_file_info {
3865         my ($diff, @parents) = @_;
3866
3867         $diff->{'from_file'} = [ ];
3868         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3869         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3870                 if ($diff->{'status'}[$i] eq 'R' ||
3871                     $diff->{'status'}[$i] eq 'C') {
3872                         $diff->{'from_file'}[$i] =
3873                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3874                 }
3875         }
3876
3877         return $diff;
3878 }
3879
3880 # is current raw difftree line of file deletion
3881 sub is_deleted {
3882         my $diffinfo = shift;
3883
3884         return $diffinfo->{'to_id'} eq ('0' x 40);
3885 }
3886
3887 # does patch correspond to [previous] difftree raw line
3888 # $diffinfo  - hashref of parsed raw diff format
3889 # $patchinfo - hashref of parsed patch diff format
3890 #              (the same keys as in $diffinfo)
3891 sub is_patch_split {
3892         my ($diffinfo, $patchinfo) = @_;
3893
3894         return defined $diffinfo && defined $patchinfo
3895                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3896 }
3897
3898
3899 sub git_difftree_body {
3900         my ($difftree, $hash, @parents) = @_;
3901         my ($parent) = $parents[0];
3902         my $have_blame = gitweb_check_feature('blame');
3903         print "<div class=\"list_head\">\n";
3904         if ($#{$difftree} > 10) {
3905                 print(($#{$difftree} + 1) . " files changed:\n");
3906         }
3907         print "</div>\n";
3908
3909         print "<table class=\"" .
3910               (@parents > 1 ? "combined " : "") .
3911               "diff_tree\">\n";
3912
3913         # header only for combined diff in 'commitdiff' view
3914         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3915         if ($has_header) {
3916                 # table header
3917                 print "<thead><tr>\n" .
3918                        "<th></th><th></th>\n"; # filename, patchN link
3919                 for (my $i = 0; $i < @parents; $i++) {
3920                         my $par = $parents[$i];
3921                         print "<th>" .
3922                               $cgi->a({-href => href(action=>"commitdiff",
3923                                                      hash=>$hash, hash_parent=>$par),
3924                                        -title => 'commitdiff to parent number ' .
3925                                                   ($i+1) . ': ' . substr($par,0,7)},
3926                                       $i+1) .
3927                               "&nbsp;</th>\n";
3928                 }
3929                 print "</tr></thead>\n<tbody>\n";
3930         }
3931
3932         my $alternate = 1;
3933         my $patchno = 0;
3934         foreach my $line (@{$difftree}) {
3935                 my $diff = parsed_difftree_line($line);
3936
3937                 if ($alternate) {
3938                         print "<tr class=\"dark\">\n";
3939                 } else {
3940                         print "<tr class=\"light\">\n";
3941                 }
3942                 $alternate ^= 1;
3943
3944                 if (exists $diff->{'nparents'}) { # combined diff
3945
3946                         fill_from_file_info($diff, @parents)
3947                                 unless exists $diff->{'from_file'};
3948
3949                         if (!is_deleted($diff)) {
3950                                 # file exists in the result (child) commit
3951                                 print "<td>" .
3952                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3953                                                              file_name=>$diff->{'to_file'},
3954                                                              hash_base=>$hash),
3955                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3956                                       "</td>\n";
3957                         } else {
3958                                 print "<td>" .
3959                                       esc_path($diff->{'to_file'}) .
3960                                       "</td>\n";
3961                         }
3962
3963                         if ($action eq 'commitdiff') {
3964                                 # link to patch
3965                                 $patchno++;
3966                                 print "<td class=\"link\">" .
3967                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3968                                       " | " .
3969                                       "</td>\n";
3970                         }
3971
3972                         my $has_history = 0;
3973                         my $not_deleted = 0;
3974                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3975                                 my $hash_parent = $parents[$i];
3976                                 my $from_hash = $diff->{'from_id'}[$i];
3977                                 my $from_path = $diff->{'from_file'}[$i];
3978                                 my $status = $diff->{'status'}[$i];
3979
3980                                 $has_history ||= ($status ne 'A');
3981                                 $not_deleted ||= ($status ne 'D');
3982
3983                                 if ($status eq 'A') {
3984                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3985                                 } elsif ($status eq 'D') {
3986                                         print "<td class=\"link\">" .
3987                                               $cgi->a({-href => href(action=>"blob",
3988                                                                      hash_base=>$hash,
3989                                                                      hash=>$from_hash,
3990                                                                      file_name=>$from_path)},
3991                                                       "blob" . ($i+1)) .
3992                                               " | </td>\n";
3993                                 } else {
3994                                         if ($diff->{'to_id'} eq $from_hash) {
3995                                                 print "<td class=\"link nochange\">";
3996                                         } else {
3997                                                 print "<td class=\"link\">";
3998                                         }
3999                                         print $cgi->a({-href => href(action=>"blobdiff",
4000                                                                      hash=>$diff->{'to_id'},
4001                                                                      hash_parent=>$from_hash,
4002                                                                      hash_base=>$hash,
4003                                                                      hash_parent_base=>$hash_parent,
4004                                                                      file_name=>$diff->{'to_file'},
4005                                                                      file_parent=>$from_path)},
4006                                                       "diff" . ($i+1)) .
4007                                               " | </td>\n";
4008                                 }
4009                         }
4010
4011                         print "<td class=\"link\">";
4012                         if ($not_deleted) {
4013                                 print $cgi->a({-href => href(action=>"blob",
4014                                                              hash=>$diff->{'to_id'},
4015                                                              file_name=>$diff->{'to_file'},
4016                                                              hash_base=>$hash)},
4017                                               "blob");
4018                                 print " | " if ($has_history);
4019                         }
4020                         if ($has_history) {
4021                                 print $cgi->a({-href => href(action=>"history",
4022                                                              file_name=>$diff->{'to_file'},
4023                                                              hash_base=>$hash)},
4024                                               "history");
4025                         }
4026                         print "</td>\n";
4027
4028                         print "</tr>\n";
4029                         next; # instead of 'else' clause, to avoid extra indent
4030                 }
4031                 # else ordinary diff
4032
4033                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4034                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4035                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4036                         $to_mode_oct = oct $diff->{'to_mode'};
4037                         if (S_ISREG($to_mode_oct)) { # only for regular file
4038                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4039                         }
4040                         $to_file_type = file_type($diff->{'to_mode'});
4041                 }
4042                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4043                         $from_mode_oct = oct $diff->{'from_mode'};
4044                         if (S_ISREG($to_mode_oct)) { # only for regular file
4045                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4046                         }
4047                         $from_file_type = file_type($diff->{'from_mode'});
4048                 }
4049
4050                 if ($diff->{'status'} eq "A") { # created
4051                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4052                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4053                         $mode_chng   .= "]</span>";
4054                         print "<td>";
4055                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4056                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4057                                       -class => "list"}, esc_path($diff->{'file'}));
4058                         print "</td>\n";
4059                         print "<td>$mode_chng</td>\n";
4060                         print "<td class=\"link\">";
4061                         if ($action eq 'commitdiff') {
4062                                 # link to patch
4063                                 $patchno++;
4064                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4065                                 print " | ";
4066                         }
4067                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4068                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4069                                       "blob");
4070                         print "</td>\n";
4071
4072                 } elsif ($diff->{'status'} eq "D") { # deleted
4073                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4074                         print "<td>";
4075                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4076                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4077                                        -class => "list"}, esc_path($diff->{'file'}));
4078                         print "</td>\n";
4079                         print "<td>$mode_chng</td>\n";
4080                         print "<td class=\"link\">";
4081                         if ($action eq 'commitdiff') {
4082                                 # link to patch
4083                                 $patchno++;
4084                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4085                                 print " | ";
4086                         }
4087                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4088                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4089                                       "blob") . " | ";
4090                         if ($have_blame) {
4091                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4092                                                              file_name=>$diff->{'file'})},
4093                                               "blame") . " | ";
4094                         }
4095                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4096                                                      file_name=>$diff->{'file'})},
4097                                       "history");
4098                         print "</td>\n";
4099
4100                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4101                         my $mode_chnge = "";
4102                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4103                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4104                                 if ($from_file_type ne $to_file_type) {
4105                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4106                                 }
4107                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4108                                         if ($from_mode_str && $to_mode_str) {
4109                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4110                                         } elsif ($to_mode_str) {
4111                                                 $mode_chnge .= " mode: $to_mode_str";
4112                                         }
4113                                 }
4114                                 $mode_chnge .= "]</span>\n";
4115                         }
4116                         print "<td>";
4117                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4118                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4119                                       -class => "list"}, esc_path($diff->{'file'}));
4120                         print "</td>\n";
4121                         print "<td>$mode_chnge</td>\n";
4122                         print "<td class=\"link\">";
4123                         if ($action eq 'commitdiff') {
4124                                 # link to patch
4125                                 $patchno++;
4126                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4127                                       " | ";
4128                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4129                                 # "commit" view and modified file (not onlu mode changed)
4130                                 print $cgi->a({-href => href(action=>"blobdiff",
4131                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4132                                                              hash_base=>$hash, hash_parent_base=>$parent,
4133                                                              file_name=>$diff->{'file'})},
4134                                               "diff") .
4135                                       " | ";
4136                         }
4137                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4138                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4139                                        "blob") . " | ";
4140                         if ($have_blame) {
4141                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4142                                                              file_name=>$diff->{'file'})},
4143                                               "blame") . " | ";
4144                         }
4145                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4146                                                      file_name=>$diff->{'file'})},
4147                                       "history");
4148                         print "</td>\n";
4149
4150                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4151                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4152                         my $nstatus = $status_name{$diff->{'status'}};
4153                         my $mode_chng = "";
4154                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4155                                 # mode also for directories, so we cannot use $to_mode_str
4156                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4157                         }
4158                         print "<td>" .
4159                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4160                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4161                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4162                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4163                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4164                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4165                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4166                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4167                               "<td class=\"link\">";
4168                         if ($action eq 'commitdiff') {
4169                                 # link to patch
4170                                 $patchno++;
4171                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4172                                       " | ";
4173                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4174                                 # "commit" view and modified file (not only pure rename or copy)
4175                                 print $cgi->a({-href => href(action=>"blobdiff",
4176                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4177                                                              hash_base=>$hash, hash_parent_base=>$parent,
4178                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4179                                               "diff") .
4180                                       " | ";
4181                         }
4182                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4183                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4184                                       "blob") . " | ";
4185                         if ($have_blame) {
4186                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4187                                                              file_name=>$diff->{'to_file'})},
4188                                               "blame") . " | ";
4189                         }
4190                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4191                                                     file_name=>$diff->{'to_file'})},
4192                                       "history");
4193                         print "</td>\n";
4194
4195                 } # we should not encounter Unmerged (U) or Unknown (X) status
4196                 print "</tr>\n";
4197         }
4198         print "</tbody>" if $has_header;
4199         print "</table>\n";
4200 }
4201
4202 sub git_patchset_body {
4203         my ($fd, $difftree, $hash, @hash_parents) = @_;
4204         my ($hash_parent) = $hash_parents[0];
4205
4206         my $is_combined = (@hash_parents > 1);
4207         my $patch_idx = 0;
4208         my $patch_number = 0;
4209         my $patch_line;
4210         my $diffinfo;
4211         my $to_name;
4212         my (%from, %to);
4213
4214         print "<div class=\"patchset\">\n";
4215
4216         # skip to first patch
4217         while ($patch_line = <$fd>) {
4218                 chomp $patch_line;
4219
4220                 last if ($patch_line =~ m/^diff /);
4221         }
4222
4223  PATCH:
4224         while ($patch_line) {
4225
4226                 # parse "git diff" header line
4227                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4228                         # $1 is from_name, which we do not use
4229                         $to_name = unquote($2);
4230                         $to_name =~ s!^b/!!;
4231                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4232                         # $1 is 'cc' or 'combined', which we do not use
4233                         $to_name = unquote($2);
4234                 } else {
4235                         $to_name = undef;
4236                 }
4237
4238                 # check if current patch belong to current raw line
4239                 # and parse raw git-diff line if needed
4240                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4241                         # this is continuation of a split patch
4242                         print "<div class=\"patch cont\">\n";
4243                 } else {
4244                         # advance raw git-diff output if needed
4245                         $patch_idx++ if defined $diffinfo;
4246
4247                         # read and prepare patch information
4248                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4249
4250                         # compact combined diff output can have some patches skipped
4251                         # find which patch (using pathname of result) we are at now;
4252                         if ($is_combined) {
4253                                 while ($to_name ne $diffinfo->{'to_file'}) {
4254                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4255                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4256                                               "</div>\n";  # class="patch"
4257
4258                                         $patch_idx++;
4259                                         $patch_number++;
4260
4261                                         last if $patch_idx > $#$difftree;
4262                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4263                                 }
4264                         }
4265
4266                         # modifies %from, %to hashes
4267                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4268
4269                         # this is first patch for raw difftree line with $patch_idx index
4270                         # we index @$difftree array from 0, but number patches from 1
4271                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4272                 }
4273
4274                 # git diff header
4275                 #assert($patch_line =~ m/^diff /) if DEBUG;
4276                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4277                 $patch_number++;
4278                 # print "git diff" header
4279                 print format_git_diff_header_line($patch_line, $diffinfo,
4280                                                   \%from, \%to);
4281
4282                 # print extended diff header
4283                 print "<div class=\"diff extended_header\">\n";
4284         EXTENDED_HEADER:
4285                 while ($patch_line = <$fd>) {
4286                         chomp $patch_line;
4287
4288                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4289
4290                         print format_extended_diff_header_line($patch_line, $diffinfo,
4291                                                                \%from, \%to);
4292                 }
4293                 print "</div>\n"; # class="diff extended_header"
4294
4295                 # from-file/to-file diff header
4296                 if (! $patch_line) {
4297                         print "</div>\n"; # class="patch"
4298                         last PATCH;
4299                 }
4300                 next PATCH if ($patch_line =~ m/^diff /);
4301                 #assert($patch_line =~ m/^---/) if DEBUG;
4302
4303                 my $last_patch_line = $patch_line;
4304                 $patch_line = <$fd>;
4305                 chomp $patch_line;
4306                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4307
4308                 print format_diff_from_to_header($last_patch_line, $patch_line,
4309                                                  $diffinfo, \%from, \%to,
4310                                                  @hash_parents);
4311
4312                 # the patch itself
4313         LINE:
4314                 while ($patch_line = <$fd>) {
4315                         chomp $patch_line;
4316
4317                         next PATCH if ($patch_line =~ m/^diff /);
4318
4319                         print format_diff_line($patch_line, \%from, \%to);
4320                 }
4321
4322         } continue {
4323                 print "</div>\n"; # class="patch"
4324         }
4325
4326         # for compact combined (--cc) format, with chunk and patch simpliciaction
4327         # patchset might be empty, but there might be unprocessed raw lines
4328         for (++$patch_idx if $patch_number > 0;
4329              $patch_idx < @$difftree;
4330              ++$patch_idx) {
4331                 # read and prepare patch information
4332                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4333
4334                 # generate anchor for "patch" links in difftree / whatchanged part
4335                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4336                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4337                       "</div>\n";  # class="patch"
4338
4339                 $patch_number++;
4340         }
4341
4342         if ($patch_number == 0) {
4343                 if (@hash_parents > 1) {
4344                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4345                 } else {
4346                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4347                 }
4348         }
4349
4350         print "</div>\n"; # class="patchset"
4351 }
4352
4353 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4354
4355 # fills project list info (age, description, owner, forks) for each
4356 # project in the list, removing invalid projects from returned list
4357 # NOTE: modifies $projlist, but does not remove entries from it
4358 sub fill_project_list_info {
4359         my ($projlist, $check_forks) = @_;
4360         my @projects;
4361
4362         my $show_ctags = gitweb_check_feature('ctags');
4363  PROJECT:
4364         foreach my $pr (@$projlist) {
4365                 my (@activity) = git_get_last_activity($pr->{'path'});
4366                 unless (@activity) {
4367                         next PROJECT;
4368                 }
4369                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4370                 if (!defined $pr->{'descr'}) {
4371                         my $descr = git_get_project_description($pr->{'path'}) || "";
4372                         $descr = to_utf8($descr);
4373                         $pr->{'descr_long'} = $descr;
4374                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4375                 }
4376                 if (!defined $pr->{'owner'}) {
4377                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4378                 }
4379                 if ($check_forks) {
4380                         my $pname = $pr->{'path'};
4381                         if (($pname =~ s/\.git$//) &&
4382                             ($pname !~ /\/$/) &&
4383                             (-d "$projectroot/$pname")) {
4384                                 $pr->{'forks'} = "-d $projectroot/$pname";
4385                         } else {
4386                                 $pr->{'forks'} = 0;
4387                         }
4388                 }
4389                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4390                 push @projects, $pr;
4391         }
4392
4393         return @projects;
4394 }
4395
4396 # print 'sort by' <th> element, generating 'sort by $name' replay link
4397 # if that order is not selected
4398 sub print_sort_th {
4399         print format_sort_th(@_);
4400 }
4401
4402 sub format_sort_th {
4403         my ($name, $order, $header) = @_;
4404         my $sort_th = "";
4405         $header ||= ucfirst($name);
4406
4407         if ($order eq $name) {
4408                 $sort_th .= "<th>$header</th>\n";
4409         } else {
4410                 $sort_th .= "<th>" .
4411                             $cgi->a({-href => href(-replay=>1, order=>$name),
4412                                      -class => "header"}, $header) .
4413                             "</th>\n";
4414         }
4415
4416         return $sort_th;
4417 }
4418
4419 sub git_project_list_body {
4420         # actually uses global variable $project
4421         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4422
4423         my $check_forks = gitweb_check_feature('forks');
4424         my @projects = fill_project_list_info($projlist, $check_forks);
4425
4426         $order ||= $default_projects_order;
4427         $from = 0 unless defined $from;
4428         $to = $#projects if (!defined $to || $#projects < $to);
4429
4430         my %order_info = (
4431                 project => { key => 'path', type => 'str' },
4432                 descr => { key => 'descr_long', type => 'str' },
4433                 owner => { key => 'owner', type => 'str' },
4434                 age => { key => 'age', type => 'num' }
4435         );
4436         my $oi = $order_info{$order};
4437         if ($oi->{'type'} eq 'str') {
4438                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4439         } else {
4440                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4441         }
4442
4443         my $show_ctags = gitweb_check_feature('ctags');
4444         if ($show_ctags) {
4445                 my %ctags;
4446                 foreach my $p (@projects) {
4447                         foreach my $ct (keys %{$p->{'ctags'}}) {
4448                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4449                         }
4450                 }
4451                 my $cloud = git_populate_project_tagcloud(\%ctags);
4452                 print git_show_project_tagcloud($cloud, 64);
4453         }
4454
4455         print "<table class=\"project_list\">\n";
4456         unless ($no_header) {
4457                 print "<tr>\n";
4458                 if ($check_forks) {
4459                         print "<th></th>\n";
4460                 }
4461                 print_sort_th('project', $order, 'Project');
4462                 print_sort_th('descr', $order, 'Description');
4463                 print_sort_th('owner', $order, 'Owner');
4464                 print_sort_th('age', $order, 'Last Change');
4465                 print "<th></th>\n" . # for links
4466                       "</tr>\n";
4467         }
4468         my $alternate = 1;
4469         my $tagfilter = $cgi->param('by_tag');
4470         for (my $i = $from; $i <= $to; $i++) {
4471                 my $pr = $projects[$i];
4472
4473                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4474                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4475                         and not $pr->{'descr_long'} =~ /$searchtext/;
4476                 # Weed out forks or non-matching entries of search
4477                 if ($check_forks) {
4478                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4479                         $forkbase="^$forkbase" if $forkbase;
4480                         next if not $searchtext and not $tagfilter and $show_ctags
4481                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4482                 }
4483
4484                 if ($alternate) {
4485                         print "<tr class=\"dark\">\n";
4486                 } else {
4487                         print "<tr class=\"light\">\n";
4488                 }
4489                 $alternate ^= 1;
4490                 if ($check_forks) {
4491                         print "<td>";
4492                         if ($pr->{'forks'}) {
4493                                 print "<!-- $pr->{'forks'} -->\n";
4494                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4495                         }
4496                         print "</td>\n";
4497                 }
4498                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4499                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4500                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4501                                         -class => "list", -title => $pr->{'descr_long'}},
4502                                         esc_html($pr->{'descr'})) . "</td>\n" .
4503                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4504                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4505                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4506                       "<td class=\"link\">" .
4507                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4508                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4509                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4510                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4511                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4512                       "</td>\n" .
4513                       "</tr>\n";
4514         }
4515         if (defined $extra) {
4516                 print "<tr>\n";
4517                 if ($check_forks) {
4518                         print "<td></td>\n";
4519                 }
4520                 print "<td colspan=\"5\">$extra</td>\n" .
4521                       "</tr>\n";
4522         }
4523         print "</table>\n";
4524 }
4525
4526 sub git_log_body {
4527         # uses global variable $project
4528         my ($commitlist, $from, $to, $refs, $extra) = @_;
4529
4530         $from = 0 unless defined $from;
4531         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4532
4533         for (my $i = 0; $i <= $to; $i++) {
4534                 my %co = %{$commitlist->[$i]};
4535                 next if !%co;
4536                 my $commit = $co{'id'};
4537                 my $ref = format_ref_marker($refs, $commit);
4538                 my %ad = parse_date($co{'author_epoch'});
4539                 git_print_header_div('commit',
4540                                "<span class=\"age\">$co{'age_string'}</span>" .
4541                                esc_html($co{'title'}) . $ref,
4542                                $commit);
4543                 print "<div class=\"title_text\">\n" .
4544                       "<div class=\"log_link\">\n" .
4545                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4546                       " | " .
4547                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4548                       " | " .
4549                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4550                       "<br/>\n" .
4551                       "</div>\n";
4552                       git_print_authorship(\%co, -tag => 'span');
4553                       print "<br/>\n</div>\n";
4554
4555                 print "<div class=\"log_body\">\n";
4556                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4557                 print "</div>\n";
4558         }
4559         if ($extra) {
4560                 print "<div class=\"page_nav\">\n";
4561                 print "$extra\n";
4562                 print "</div>\n";
4563         }
4564 }
4565
4566 sub git_shortlog_body {
4567         # uses global variable $project
4568         my ($commitlist, $from, $to, $refs, $extra) = @_;
4569
4570         $from = 0 unless defined $from;
4571         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4572
4573         print "<table class=\"shortlog\">\n";
4574         my $alternate = 1;
4575         for (my $i = $from; $i <= $to; $i++) {
4576                 my %co = %{$commitlist->[$i]};
4577                 my $commit = $co{'id'};
4578                 my $ref = format_ref_marker($refs, $commit);
4579                 if ($alternate) {
4580                         print "<tr class=\"dark\">\n";
4581                 } else {
4582                         print "<tr class=\"light\">\n";
4583                 }
4584                 $alternate ^= 1;
4585                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4586                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4587                       format_author_html('td', \%co, 10) . "<td>";
4588                 print format_subject_html($co{'title'}, $co{'title_short'},
4589                                           href(action=>"commit", hash=>$commit), $ref);
4590                 print "</td>\n" .
4591                       "<td class=\"link\">" .
4592                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4593                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4594                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4595                 my $snapshot_links = format_snapshot_links($commit);
4596                 if (defined $snapshot_links) {
4597                         print " | " . $snapshot_links;
4598                 }
4599                 print "</td>\n" .
4600                       "</tr>\n";
4601         }
4602         if (defined $extra) {
4603                 print "<tr>\n" .
4604                       "<td colspan=\"4\">$extra</td>\n" .
4605                       "</tr>\n";
4606         }
4607         print "</table>\n";
4608 }
4609
4610 sub git_history_body {
4611         # Warning: assumes constant type (blob or tree) during history
4612         my ($commitlist, $from, $to, $refs, $extra,
4613             $file_name, $file_hash, $ftype) = @_;
4614
4615         $from = 0 unless defined $from;
4616         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4617
4618         print "<table class=\"history\">\n";
4619         my $alternate = 1;
4620         for (my $i = $from; $i <= $to; $i++) {
4621                 my %co = %{$commitlist->[$i]};
4622                 if (!%co) {
4623                         next;
4624                 }
4625                 my $commit = $co{'id'};
4626
4627                 my $ref = format_ref_marker($refs, $commit);
4628
4629                 if ($alternate) {
4630                         print "<tr class=\"dark\">\n";
4631                 } else {
4632                         print "<tr class=\"light\">\n";
4633                 }
4634                 $alternate ^= 1;
4635                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4636         # shortlog:   format_author_html('td', \%co, 10)
4637                       format_author_html('td', \%co, 15, 3) . "<td>";
4638                 # originally git_history used chop_str($co{'title'}, 50)
4639                 print format_subject_html($co{'title'}, $co{'title_short'},
4640                                           href(action=>"commit", hash=>$commit), $ref);
4641                 print "</td>\n" .
4642                       "<td class=\"link\">" .
4643                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4644                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4645
4646                 if ($ftype eq 'blob') {
4647                         my $blob_current = $file_hash;
4648                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4649                         if (defined $blob_current && defined $blob_parent &&
4650                                         $blob_current ne $blob_parent) {
4651                                 print " | " .
4652                                         $cgi->a({-href => href(action=>"blobdiff",
4653                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4654                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4655                                                                file_name=>$file_name)},
4656                                                 "diff to current");
4657                         }
4658                 }
4659                 print "</td>\n" .
4660                       "</tr>\n";
4661         }
4662         if (defined $extra) {
4663                 print "<tr>\n" .
4664                       "<td colspan=\"4\">$extra</td>\n" .
4665                       "</tr>\n";
4666         }
4667         print "</table>\n";
4668 }
4669
4670 sub git_tags_body {
4671         # uses global variable $project
4672         my ($taglist, $from, $to, $extra) = @_;
4673         $from = 0 unless defined $from;
4674         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4675
4676         print "<table class=\"tags\">\n";
4677         my $alternate = 1;
4678         for (my $i = $from; $i <= $to; $i++) {
4679                 my $entry = $taglist->[$i];
4680                 my %tag = %$entry;
4681                 my $comment = $tag{'subject'};
4682                 my $comment_short;
4683                 if (defined $comment) {
4684                         $comment_short = chop_str($comment, 30, 5);
4685                 }
4686                 if ($alternate) {
4687                         print "<tr class=\"dark\">\n";
4688                 } else {
4689                         print "<tr class=\"light\">\n";
4690                 }
4691                 $alternate ^= 1;
4692                 if (defined $tag{'age'}) {
4693                         print "<td><i>$tag{'age'}</i></td>\n";
4694                 } else {
4695                         print "<td></td>\n";
4696                 }
4697                 print "<td>" .
4698                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4699                                -class => "list name"}, esc_html($tag{'name'})) .
4700                       "</td>\n" .
4701                       "<td>";
4702                 if (defined $comment) {
4703                         print format_subject_html($comment, $comment_short,
4704                                                   href(action=>"tag", hash=>$tag{'id'}));
4705                 }
4706                 print "</td>\n" .
4707                       "<td class=\"selflink\">";
4708                 if ($tag{'type'} eq "tag") {
4709                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4710                 } else {
4711                         print "&nbsp;";
4712                 }
4713                 print "</td>\n" .
4714                       "<td class=\"link\">" . " | " .
4715                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4716                 if ($tag{'reftype'} eq "commit") {
4717                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4718                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4719                 } elsif ($tag{'reftype'} eq "blob") {
4720                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4721                 }
4722                 print "</td>\n" .
4723                       "</tr>";
4724         }
4725         if (defined $extra) {
4726                 print "<tr>\n" .
4727                       "<td colspan=\"5\">$extra</td>\n" .
4728                       "</tr>\n";
4729         }
4730         print "</table>\n";
4731 }
4732
4733 sub git_heads_body {
4734         # uses global variable $project
4735         my ($headlist, $head, $from, $to, $extra) = @_;
4736         $from = 0 unless defined $from;
4737         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4738
4739         print "<table class=\"heads\">\n";
4740         my $alternate = 1;
4741         for (my $i = $from; $i <= $to; $i++) {
4742                 my $entry = $headlist->[$i];
4743                 my %ref = %$entry;
4744                 my $curr = $ref{'id'} eq $head;
4745                 if ($alternate) {
4746                         print "<tr class=\"dark\">\n";
4747                 } else {
4748                         print "<tr class=\"light\">\n";
4749                 }
4750                 $alternate ^= 1;
4751                 print "<td><i>$ref{'age'}</i></td>\n" .
4752                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4753                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4754                                -class => "list name"},esc_html($ref{'name'})) .
4755                       "</td>\n" .
4756                       "<td class=\"link\">" .
4757                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4758                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4759                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4760                       "</td>\n" .
4761                       "</tr>";
4762         }
4763         if (defined $extra) {
4764                 print "<tr>\n" .
4765                       "<td colspan=\"3\">$extra</td>\n" .
4766                       "</tr>\n";
4767         }
4768         print "</table>\n";
4769 }
4770
4771 sub git_search_grep_body {
4772         my ($commitlist, $from, $to, $extra) = @_;
4773         $from = 0 unless defined $from;
4774         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4775
4776         print "<table class=\"commit_search\">\n";
4777         my $alternate = 1;
4778         for (my $i = $from; $i <= $to; $i++) {
4779                 my %co = %{$commitlist->[$i]};
4780                 if (!%co) {
4781                         next;
4782                 }
4783                 my $commit = $co{'id'};
4784                 if ($alternate) {
4785                         print "<tr class=\"dark\">\n";
4786                 } else {
4787                         print "<tr class=\"light\">\n";
4788                 }
4789                 $alternate ^= 1;
4790                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4791                       format_author_html('td', \%co, 15, 5) .
4792                       "<td>" .
4793                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4794                                -class => "list subject"},
4795                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4796                 my $comment = $co{'comment'};
4797                 foreach my $line (@$comment) {
4798                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4799                                 my ($lead, $match, $trail) = ($1, $2, $3);
4800                                 $match = chop_str($match, 70, 5, 'center');
4801                                 my $contextlen = int((80 - length($match))/2);
4802                                 $contextlen = 30 if ($contextlen > 30);
4803                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4804                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4805
4806                                 $lead  = esc_html($lead);
4807                                 $match = esc_html($match);
4808                                 $trail = esc_html($trail);
4809
4810                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4811                         }
4812                 }
4813                 print "</td>\n" .
4814                       "<td class=\"link\">" .
4815                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4816                       " | " .
4817                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4818                       " | " .
4819                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4820                 print "</td>\n" .
4821                       "</tr>\n";
4822         }
4823         if (defined $extra) {
4824                 print "<tr>\n" .
4825                       "<td colspan=\"3\">$extra</td>\n" .
4826                       "</tr>\n";
4827         }
4828         print "</table>\n";
4829 }
4830
4831 ## ======================================================================
4832 ## ======================================================================
4833 ## actions
4834
4835 sub git_project_list {
4836         my $order = $input_params{'order'};
4837         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4838                 die_error(400, "Unknown order parameter");
4839         }
4840
4841         my @list = git_get_projects_list();
4842         if (!@list) {
4843                 die_error(404, "No projects found");
4844         }
4845
4846         git_header_html();
4847         if (defined $home_text && -f $home_text) {
4848                 print "<div class=\"index_include\">\n";
4849                 insert_file($home_text);
4850                 print "</div>\n";
4851         }
4852         print $cgi->startform(-method => "get") .
4853               "<p class=\"projsearch\">Search:\n" .
4854               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4855               "</p>" .
4856               $cgi->end_form() . "\n";
4857         git_project_list_body(\@list, $order);
4858         git_footer_html();
4859 }
4860
4861 sub git_forks {
4862         my $order = $input_params{'order'};
4863         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4864                 die_error(400, "Unknown order parameter");
4865         }
4866
4867         my @list = git_get_projects_list($project);
4868         if (!@list) {
4869                 die_error(404, "No forks found");
4870         }
4871
4872         git_header_html();
4873         git_print_page_nav('','');
4874         git_print_header_div('summary', "$project forks");
4875         git_project_list_body(\@list, $order);
4876         git_footer_html();
4877 }
4878
4879 sub git_project_index {
4880         my @projects = git_get_projects_list($project);
4881
4882         print $cgi->header(
4883                 -type => 'text/plain',
4884                 -charset => 'utf-8',
4885                 -content_disposition => 'inline; filename="index.aux"');
4886
4887         foreach my $pr (@projects) {
4888                 if (!exists $pr->{'owner'}) {
4889                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4890                 }
4891
4892                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4893                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4894                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4895                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4896                 $path  =~ s/ /\+/g;
4897                 $owner =~ s/ /\+/g;
4898
4899                 print "$path $owner\n";
4900         }
4901 }
4902
4903 sub git_summary {
4904         my $descr = git_get_project_description($project) || "none";
4905         my %co = parse_commit("HEAD");
4906         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4907         my $head = $co{'id'};
4908
4909         my $owner = git_get_project_owner($project);
4910
4911         my $refs = git_get_references();
4912         # These get_*_list functions return one more to allow us to see if
4913         # there are more ...
4914         my @taglist  = git_get_tags_list(16);
4915         my @headlist = git_get_heads_list(16);
4916         my @forklist;
4917         my $check_forks = gitweb_check_feature('forks');
4918
4919         if ($check_forks) {
4920                 @forklist = git_get_projects_list($project);
4921         }
4922
4923         git_header_html();
4924         git_print_page_nav('summary','', $head);
4925
4926         print "<div class=\"title\">&nbsp;</div>\n";
4927         print "<table class=\"projects_list\">\n" .
4928               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4929               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4930         if (defined $cd{'rfc2822'}) {
4931                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4932         }
4933
4934         # use per project git URL list in $projectroot/$project/cloneurl
4935         # or make project git URL from git base URL and project name
4936         my $url_tag = "URL";
4937         my @url_list = git_get_project_url_list($project);
4938         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4939         foreach my $git_url (@url_list) {
4940                 next unless $git_url;
4941                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4942                 $url_tag = "";
4943         }
4944
4945         # Tag cloud
4946         my $show_ctags = gitweb_check_feature('ctags');
4947         if ($show_ctags) {
4948                 my $ctags = git_get_project_ctags($project);
4949                 my $cloud = git_populate_project_tagcloud($ctags);
4950                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4951                 print "</td>\n<td>" unless %$ctags;
4952                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4953                 print "</td>\n<td>" if %$ctags;
4954                 print git_show_project_tagcloud($cloud, 48);
4955                 print "</td></tr>";
4956         }
4957
4958         print "</table>\n";
4959
4960         # If XSS prevention is on, we don't include README.html.
4961         # TODO: Allow a readme in some safe format.
4962         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4963                 print "<div class=\"title\">readme</div>\n" .
4964                       "<div class=\"readme\">\n";
4965                 insert_file("$projectroot/$project/README.html");
4966                 print "\n</div>\n"; # class="readme"
4967         }
4968
4969         # we need to request one more than 16 (0..15) to check if
4970         # those 16 are all
4971         my @commitlist = $head ? parse_commits($head, 17) : ();
4972         if (@commitlist) {
4973                 git_print_header_div('shortlog');
4974                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4975                                   $#commitlist <=  15 ? undef :
4976                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4977         }
4978
4979         if (@taglist) {
4980                 git_print_header_div('tags');
4981                 git_tags_body(\@taglist, 0, 15,
4982                               $#taglist <=  15 ? undef :
4983                               $cgi->a({-href => href(action=>"tags")}, "..."));
4984         }
4985
4986         if (@headlist) {
4987                 git_print_header_div('heads');
4988                 git_heads_body(\@headlist, $head, 0, 15,
4989                                $#headlist <= 15 ? undef :
4990                                $cgi->a({-href => href(action=>"heads")}, "..."));
4991         }
4992
4993         if (@forklist) {
4994                 git_print_header_div('forks');
4995                 git_project_list_body(\@forklist, 'age', 0, 15,
4996                                       $#forklist <= 15 ? undef :
4997                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4998                                       'no_header');
4999         }
5000
5001         git_footer_html();
5002 }
5003
5004 sub git_tag {
5005         my $head = git_get_head_hash($project);
5006         git_header_html();
5007         git_print_page_nav('','', $head,undef,$head);
5008         my %tag = parse_tag($hash);
5009
5010         if (! %tag) {
5011                 die_error(404, "Unknown tag object");
5012         }
5013
5014         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5015         print "<div class=\"title_text\">\n" .
5016               "<table class=\"object_header\">\n" .
5017               "<tr>\n" .
5018               "<td>object</td>\n" .
5019               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5020                                $tag{'object'}) . "</td>\n" .
5021               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5022                                               $tag{'type'}) . "</td>\n" .
5023               "</tr>\n";
5024         if (defined($tag{'author'})) {
5025                 git_print_authorship_rows(\%tag, 'author');
5026         }
5027         print "</table>\n\n" .
5028               "</div>\n";
5029         print "<div class=\"page_body\">";
5030         my $comment = $tag{'comment'};
5031         foreach my $line (@$comment) {
5032                 chomp $line;
5033                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5034         }
5035         print "</div>\n";
5036         git_footer_html();
5037 }
5038
5039 sub git_blame_common {
5040         my $format = shift || 'porcelain';
5041         if ($format eq 'porcelain' && $cgi->param('js')) {
5042                 $format = 'incremental';
5043                 $action = 'blame_incremental'; # for page title etc
5044         }
5045
5046         # permissions
5047         gitweb_check_feature('blame')
5048                 or die_error(403, "Blame view not allowed");
5049
5050         # error checking
5051         die_error(400, "No file name given") unless $file_name;
5052         $hash_base ||= git_get_head_hash($project);
5053         die_error(404, "Couldn't find base commit") unless $hash_base;
5054         my %co = parse_commit($hash_base)
5055                 or die_error(404, "Commit not found");
5056         my $ftype = "blob";
5057         if (!defined $hash) {
5058                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5059                         or die_error(404, "Error looking up file");
5060         } else {
5061                 $ftype = git_get_type($hash);
5062                 if ($ftype !~ "blob") {
5063                         die_error(400, "Object is not a blob");
5064                 }
5065         }
5066
5067         my $fd;
5068         if ($format eq 'incremental') {
5069                 # get file contents (as base)
5070                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5071                         or die_error(500, "Open git-cat-file failed");
5072         } elsif ($format eq 'data') {
5073                 # run git-blame --incremental
5074                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5075                         $hash_base, "--", $file_name
5076                         or die_error(500, "Open git-blame --incremental failed");
5077         } else {
5078                 # run git-blame --porcelain
5079                 open $fd, "-|", git_cmd(), "blame", '-p',
5080                         $hash_base, '--', $file_name
5081                         or die_error(500, "Open git-blame --porcelain failed");
5082         }
5083
5084         # incremental blame data returns early
5085         if ($format eq 'data') {
5086                 print $cgi->header(
5087                         -type=>"text/plain", -charset => "utf-8",
5088                         -status=> "200 OK");
5089                 local $| = 1; # output autoflush
5090                 print while <$fd>;
5091                 close $fd
5092                         or print "ERROR $!\n";
5093
5094                 print 'END';
5095                 if (defined $t0 && gitweb_check_feature('timed')) {
5096                         print ' '.
5097                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5098                               ' '.$number_of_git_cmds;
5099                 }
5100                 print "\n";
5101
5102                 return;
5103         }
5104
5105         # page header
5106         git_header_html();
5107         my $formats_nav =
5108                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5109                         "blob") .
5110                 " | ";
5111         if ($format eq 'incremental') {
5112                 $formats_nav .=
5113                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5114                                 "blame") . " (non-incremental)";
5115         } else {
5116                 $formats_nav .=
5117                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5118                                 "blame") . " (incremental)";
5119         }
5120         $formats_nav .=
5121                 " | " .
5122                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5123                         "history") .
5124                 " | " .
5125                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5126                         "HEAD");
5127         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5128         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5129         git_print_page_path($file_name, $ftype, $hash_base);
5130
5131         # page body
5132         if ($format eq 'incremental') {
5133                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5134                       "This page requires JavaScript to run.\n Use ".
5135                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5136                               'this page').
5137                       " instead.\n".
5138                       "</b></center></div>\n</noscript>\n";
5139
5140                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5141         }
5142
5143         print qq!<div class="page_body">\n!;
5144         print qq!<div id="progress_info">... / ...</div>\n!
5145                 if ($format eq 'incremental');
5146         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5147               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5148               qq!<thead>\n!.
5149               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5150               qq!</thead>\n!.
5151               qq!<tbody>\n!;
5152
5153         my @rev_color = qw(light dark);
5154         my $num_colors = scalar(@rev_color);
5155         my $current_color = 0;
5156
5157         if ($format eq 'incremental') {
5158                 my $color_class = $rev_color[$current_color];
5159
5160                 #contents of a file
5161                 my $linenr = 0;
5162         LINE:
5163                 while (my $line = <$fd>) {
5164                         chomp $line;
5165                         $linenr++;
5166
5167                         print qq!<tr id="l$linenr" class="$color_class">!.
5168                               qq!<td class="sha1"><a href=""> </a></td>!.
5169                               qq!<td class="linenr">!.
5170                               qq!<a class="linenr" href="">$linenr</a></td>!;
5171                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5172                         print qq!</tr>\n!;
5173                 }
5174
5175         } else { # porcelain, i.e. ordinary blame
5176                 my %metainfo = (); # saves information about commits
5177
5178                 # blame data
5179         LINE:
5180                 while (my $line = <$fd>) {
5181                         chomp $line;
5182                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5183                         # no <lines in group> for subsequent lines in group of lines
5184                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5185                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5186                         if (!exists $metainfo{$full_rev}) {
5187                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5188                         }
5189                         my $meta = $metainfo{$full_rev};
5190                         my $data;
5191                         while ($data = <$fd>) {
5192                                 chomp $data;
5193                                 last if ($data =~ s/^\t//); # contents of line
5194                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5195                                         $meta->{$1} = $2 unless exists $meta->{$1};
5196                                 }
5197                                 if ($data =~ /^previous /) {
5198                                         $meta->{'nprevious'}++;
5199                                 }
5200                         }
5201                         my $short_rev = substr($full_rev, 0, 8);
5202                         my $author = $meta->{'author'};
5203                         my %date =
5204                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5205                         my $date = $date{'iso-tz'};
5206                         if ($group_size) {
5207                                 $current_color = ($current_color + 1) % $num_colors;
5208                         }
5209                         my $tr_class = $rev_color[$current_color];
5210                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5211                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5212                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5213                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5214                         if ($group_size) {
5215                                 print "<td class=\"sha1\"";
5216                                 print " title=\"". esc_html($author) . ", $date\"";
5217                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5218                                 print ">";
5219                                 print $cgi->a({-href => href(action=>"commit",
5220                                                              hash=>$full_rev,
5221                                                              file_name=>$file_name)},
5222                                               esc_html($short_rev));
5223                                 if ($group_size >= 2) {
5224                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5225                                         if (@author_initials) {
5226                                                 print "<br />" .
5227                                                       esc_html(join('', @author_initials));
5228                                                 #           or join('.', ...)
5229                                         }
5230                                 }
5231                                 print "</td>\n";
5232                         }
5233                         # 'previous' <sha1 of parent commit> <filename at commit>
5234                         if (exists $meta->{'previous'} &&
5235                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5236                                 $meta->{'parent'} = $1;
5237                                 $meta->{'file_parent'} = unquote($2);
5238                         }
5239                         my $linenr_commit =
5240                                 exists($meta->{'parent'}) ?
5241                                 $meta->{'parent'} : $full_rev;
5242                         my $linenr_filename =
5243                                 exists($meta->{'file_parent'}) ?
5244                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5245                         my $blamed = href(action => 'blame',
5246                                           file_name => $linenr_filename,
5247                                           hash_base => $linenr_commit);
5248                         print "<td class=\"linenr\">";
5249                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5250                                         -class => "linenr" },
5251                                       esc_html($lineno));
5252                         print "</td>";
5253                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5254                         print "</tr>\n";
5255                 } # end while
5256
5257         }
5258
5259         # footer
5260         print "</tbody>\n".
5261               "</table>\n"; # class="blame"
5262         print "</div>\n";   # class="blame_body"
5263         close $fd
5264                 or print "Reading blob failed\n";
5265
5266         git_footer_html();
5267 }
5268
5269 sub git_blame {
5270         git_blame_common();
5271 }
5272
5273 sub git_blame_incremental {
5274         git_blame_common('incremental');
5275 }
5276
5277 sub git_blame_data {
5278         git_blame_common('data');
5279 }
5280
5281 sub git_tags {
5282         my $head = git_get_head_hash($project);
5283         git_header_html();
5284         git_print_page_nav('','', $head,undef,$head);
5285         git_print_header_div('summary', $project);
5286
5287         my @tagslist = git_get_tags_list();
5288         if (@tagslist) {
5289                 git_tags_body(\@tagslist);
5290         }
5291         git_footer_html();
5292 }
5293
5294 sub git_heads {
5295         my $head = git_get_head_hash($project);
5296         git_header_html();
5297         git_print_page_nav('','', $head,undef,$head);
5298         git_print_header_div('summary', $project);
5299
5300         my @headslist = git_get_heads_list();
5301         if (@headslist) {
5302                 git_heads_body(\@headslist, $head);
5303         }
5304         git_footer_html();
5305 }
5306
5307 sub git_blob_plain {
5308         my $type = shift;
5309         my $expires;
5310
5311         if (!defined $hash) {
5312                 if (defined $file_name) {
5313                         my $base = $hash_base || git_get_head_hash($project);
5314                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5315                                 or die_error(404, "Cannot find file");
5316                 } else {
5317                         die_error(400, "No file name defined");
5318                 }
5319         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5320                 # blobs defined by non-textual hash id's can be cached
5321                 $expires = "+1d";
5322         }
5323
5324         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5325                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5326
5327         # content-type (can include charset)
5328         $type = blob_contenttype($fd, $file_name, $type);
5329
5330         # "save as" filename, even when no $file_name is given
5331         my $save_as = "$hash";
5332         if (defined $file_name) {
5333                 $save_as = $file_name;
5334         } elsif ($type =~ m/^text\//) {
5335                 $save_as .= '.txt';
5336         }
5337
5338         # With XSS prevention on, blobs of all types except a few known safe
5339         # ones are served with "Content-Disposition: attachment" to make sure
5340         # they don't run in our security domain.  For certain image types,
5341         # blob view writes an <img> tag referring to blob_plain view, and we
5342         # want to be sure not to break that by serving the image as an
5343         # attachment (though Firefox 3 doesn't seem to care).
5344         my $sandbox = $prevent_xss &&
5345                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5346
5347         print $cgi->header(
5348                 -type => $type,
5349                 -expires => $expires,
5350                 -content_disposition =>
5351                         ($sandbox ? 'attachment' : 'inline')
5352                         . '; filename="' . $save_as . '"');
5353         local $/ = undef;
5354         binmode STDOUT, ':raw';
5355         print <$fd>;
5356         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5357         close $fd;
5358 }
5359
5360 sub git_blob {
5361         my $expires;
5362
5363         if (!defined $hash) {
5364                 if (defined $file_name) {
5365                         my $base = $hash_base || git_get_head_hash($project);
5366                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5367                                 or die_error(404, "Cannot find file");
5368                 } else {
5369                         die_error(400, "No file name defined");
5370                 }
5371         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5372                 # blobs defined by non-textual hash id's can be cached
5373                 $expires = "+1d";
5374         }
5375
5376         my $have_blame = gitweb_check_feature('blame');
5377         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5378                 or die_error(500, "Couldn't cat $file_name, $hash");
5379         my $mimetype = blob_mimetype($fd, $file_name);
5380         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5381                 close $fd;
5382                 return git_blob_plain($mimetype);
5383         }
5384         # we can have blame only for text/* mimetype
5385         $have_blame &&= ($mimetype =~ m!^text/!);
5386
5387         git_header_html(undef, $expires);
5388         my $formats_nav = '';
5389         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5390                 if (defined $file_name) {
5391                         if ($have_blame) {
5392                                 $formats_nav .=
5393                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5394                                                 "blame") .
5395                                         " | ";
5396                         }
5397                         $formats_nav .=
5398                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5399                                         "history") .
5400                                 " | " .
5401                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5402                                         "raw") .
5403                                 " | " .
5404                                 $cgi->a({-href => href(action=>"blob",
5405                                                        hash_base=>"HEAD", file_name=>$file_name)},
5406                                         "HEAD");
5407                 } else {
5408                         $formats_nav .=
5409                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5410                                         "raw");
5411                 }
5412                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5413                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5414         } else {
5415                 print "<div class=\"page_nav\">\n" .
5416                       "<br/><br/></div>\n" .
5417                       "<div class=\"title\">$hash</div>\n";
5418         }
5419         git_print_page_path($file_name, "blob", $hash_base);
5420         print "<div class=\"page_body\">\n";
5421         if ($mimetype =~ m!^image/!) {
5422                 print qq!<img type="$mimetype"!;
5423                 if ($file_name) {
5424                         print qq! alt="$file_name" title="$file_name"!;
5425                 }
5426                 print qq! src="! .
5427                       href(action=>"blob_plain", hash=>$hash,
5428                            hash_base=>$hash_base, file_name=>$file_name) .
5429                       qq!" />\n!;
5430         } else {
5431                 my $nr;
5432                 while (my $line = <$fd>) {
5433                         chomp $line;
5434                         $nr++;
5435                         $line = untabify($line);
5436                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5437                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5438                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5439                 }
5440         }
5441         close $fd
5442                 or print "Reading blob failed.\n";
5443         print "</div>";
5444         git_footer_html();
5445 }
5446
5447 sub git_tree {
5448         if (!defined $hash_base) {
5449                 $hash_base = "HEAD";
5450         }
5451         if (!defined $hash) {
5452                 if (defined $file_name) {
5453                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5454                 } else {
5455                         $hash = $hash_base;
5456                 }
5457         }
5458         die_error(404, "No such tree") unless defined($hash);
5459
5460         my $show_sizes = gitweb_check_feature('show-sizes');
5461         my $have_blame = gitweb_check_feature('blame');
5462
5463         my @entries = ();
5464         {
5465                 local $/ = "\0";
5466                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5467                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5468                         or die_error(500, "Open git-ls-tree failed");
5469                 @entries = map { chomp; $_ } <$fd>;
5470                 close $fd
5471                         or die_error(404, "Reading tree failed");
5472         }
5473
5474         my $refs = git_get_references();
5475         my $ref = format_ref_marker($refs, $hash_base);
5476         git_header_html();
5477         my $basedir = '';
5478         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5479                 my @views_nav = ();
5480                 if (defined $file_name) {
5481                         push @views_nav,
5482                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5483                                         "history"),
5484                                 $cgi->a({-href => href(action=>"tree",
5485                                                        hash_base=>"HEAD", file_name=>$file_name)},
5486                                         "HEAD"),
5487                 }
5488                 my $snapshot_links = format_snapshot_links($hash);
5489                 if (defined $snapshot_links) {
5490                         # FIXME: Should be available when we have no hash base as well.
5491                         push @views_nav, $snapshot_links;
5492                 }
5493                 git_print_page_nav('tree','', $hash_base, undef, undef,
5494                                    join(' | ', @views_nav));
5495                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5496         } else {
5497                 undef $hash_base;
5498                 print "<div class=\"page_nav\">\n";
5499                 print "<br/><br/></div>\n";
5500                 print "<div class=\"title\">$hash</div>\n";
5501         }
5502         if (defined $file_name) {
5503                 $basedir = $file_name;
5504                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5505                         $basedir .= '/';
5506                 }
5507                 git_print_page_path($file_name, 'tree', $hash_base);
5508         }
5509         print "<div class=\"page_body\">\n";
5510         print "<table class=\"tree\">\n";
5511         my $alternate = 1;
5512         # '..' (top directory) link if possible
5513         if (defined $hash_base &&
5514             defined $file_name && $file_name =~ m![^/]+$!) {
5515                 if ($alternate) {
5516                         print "<tr class=\"dark\">\n";
5517                 } else {
5518                         print "<tr class=\"light\">\n";
5519                 }
5520                 $alternate ^= 1;
5521
5522                 my $up = $file_name;
5523                 $up =~ s!/?[^/]+$!!;
5524                 undef $up unless $up;
5525                 # based on git_print_tree_entry
5526                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5527                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5528                 print '<td class="list">';
5529                 print $cgi->a({-href => href(action=>"tree",
5530                                              hash_base=>$hash_base,
5531                                              file_name=>$up)},
5532                               "..");
5533                 print "</td>\n";
5534                 print "<td class=\"link\"></td>\n";
5535
5536                 print "</tr>\n";
5537         }
5538         foreach my $line (@entries) {
5539                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5540
5541                 if ($alternate) {
5542                         print "<tr class=\"dark\">\n";
5543                 } else {
5544                         print "<tr class=\"light\">\n";
5545                 }
5546                 $alternate ^= 1;
5547
5548                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5549
5550                 print "</tr>\n";
5551         }
5552         print "</table>\n" .
5553               "</div>";
5554         git_footer_html();
5555 }
5556
5557 sub snapshot_name {
5558         my ($project, $hash) = @_;
5559
5560         # path/to/project.git  -> project
5561         # path/to/project/.git -> project
5562         my $name = to_utf8($project);
5563         $name =~ s,([^/])/*\.git$,$1,;
5564         $name = basename($name);
5565         # sanitize name
5566         $name =~ s/[[:cntrl:]]/?/g;
5567
5568         my $ver = $hash;
5569         if ($hash =~ /^[0-9a-fA-F]+$/) {
5570                 # shorten SHA-1 hash
5571                 my $full_hash = git_get_full_hash($project, $hash);
5572                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5573                         $ver = git_get_short_hash($project, $hash);
5574                 }
5575         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5576                 # tags don't need shortened SHA-1 hash
5577                 $ver = $1;
5578         } else {
5579                 # branches and other need shortened SHA-1 hash
5580                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5581                         $ver = $1;
5582                 }
5583                 $ver .= '-' . git_get_short_hash($project, $hash);
5584         }
5585         # in case of hierarchical branch names
5586         $ver =~ s!/!.!g;
5587
5588         # name = project-version_string
5589         $name = "$name-$ver";
5590
5591         return wantarray ? ($name, $name) : $name;
5592 }
5593
5594 sub git_snapshot {
5595         my $format = $input_params{'snapshot_format'};
5596         if (!@snapshot_fmts) {
5597                 die_error(403, "Snapshots not allowed");
5598         }
5599         # default to first supported snapshot format
5600         $format ||= $snapshot_fmts[0];
5601         if ($format !~ m/^[a-z0-9]+$/) {
5602                 die_error(400, "Invalid snapshot format parameter");
5603         } elsif (!exists($known_snapshot_formats{$format})) {
5604                 die_error(400, "Unknown snapshot format");
5605         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5606                 die_error(403, "Snapshot format not allowed");
5607         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5608                 die_error(403, "Unsupported snapshot format");
5609         }
5610
5611         my $type = git_get_type("$hash^{}");
5612         if (!$type) {
5613                 die_error(404, 'Object does not exist');
5614         }  elsif ($type eq 'blob') {
5615                 die_error(400, 'Object is not a tree-ish');
5616         }
5617
5618         my ($name, $prefix) = snapshot_name($project, $hash);
5619         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5620         my $cmd = quote_command(
5621                 git_cmd(), 'archive',
5622                 "--format=$known_snapshot_formats{$format}{'format'}",
5623                 "--prefix=$prefix/", $hash);
5624         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5625                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5626         }
5627
5628         $filename =~ s/(["\\])/\\$1/g;
5629         print $cgi->header(
5630                 -type => $known_snapshot_formats{$format}{'type'},
5631                 -content_disposition => 'inline; filename="' . $filename . '"',
5632                 -status => '200 OK');
5633
5634         open my $fd, "-|", $cmd
5635                 or die_error(500, "Execute git-archive failed");
5636         binmode STDOUT, ':raw';
5637         print <$fd>;
5638         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5639         close $fd;
5640 }
5641
5642 sub git_log_generic {
5643         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5644
5645         my $head = git_get_head_hash($project);
5646         if (!defined $base) {
5647                 $base = $head;
5648         }
5649         if (!defined $page) {
5650                 $page = 0;
5651         }
5652         my $refs = git_get_references();
5653
5654         my $commit_hash = $base;
5655         if (defined $parent) {
5656                 $commit_hash = "$parent..$base";
5657         }
5658         my @commitlist =
5659                 parse_commits($commit_hash, 101, (100 * $page),
5660                               defined $file_name ? ($file_name, "--full-history") : ());
5661
5662         my $ftype;
5663         if (!defined $file_hash && defined $file_name) {
5664                 # some commits could have deleted file in question,
5665                 # and not have it in tree, but one of them has to have it
5666                 for (my $i = 0; $i < @commitlist; $i++) {
5667                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5668                         last if defined $file_hash;
5669                 }
5670         }
5671         if (defined $file_hash) {
5672                 $ftype = git_get_type($file_hash);
5673         }
5674         if (defined $file_name && !defined $ftype) {
5675                 die_error(500, "Unknown type of object");
5676         }
5677         my %co;
5678         if (defined $file_name) {
5679                 %co = parse_commit($base)
5680                         or die_error(404, "Unknown commit object");
5681         }
5682
5683
5684         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5685         my $next_link = '';
5686         if ($#commitlist >= 100) {
5687                 $next_link =
5688                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5689                                  -accesskey => "n", -title => "Alt-n"}, "next");
5690         }
5691         my $patch_max = gitweb_get_feature('patches');
5692         if ($patch_max && !defined $file_name) {
5693                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5694                         $paging_nav .= " &sdot; " .
5695                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5696                                         "patches");
5697                 }
5698         }
5699
5700         git_header_html();
5701         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5702         if (defined $file_name) {
5703                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5704         } else {
5705                 git_print_header_div('summary', $project)
5706         }
5707         git_print_page_path($file_name, $ftype, $hash_base)
5708                 if (defined $file_name);
5709
5710         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5711                      $file_name, $file_hash, $ftype);
5712
5713         git_footer_html();
5714 }
5715
5716 sub git_log {
5717         git_log_generic('log', \&git_log_body,
5718                         $hash, $hash_parent);
5719 }
5720
5721 sub git_commit {
5722         $hash ||= $hash_base || "HEAD";
5723         my %co = parse_commit($hash)
5724             or die_error(404, "Unknown commit object");
5725
5726         my $parent  = $co{'parent'};
5727         my $parents = $co{'parents'}; # listref
5728
5729         # we need to prepare $formats_nav before any parameter munging
5730         my $formats_nav;
5731         if (!defined $parent) {
5732                 # --root commitdiff
5733                 $formats_nav .= '(initial)';
5734         } elsif (@$parents == 1) {
5735                 # single parent commit
5736                 $formats_nav .=
5737                         '(parent: ' .
5738                         $cgi->a({-href => href(action=>"commit",
5739                                                hash=>$parent)},
5740                                 esc_html(substr($parent, 0, 7))) .
5741                         ')';
5742         } else {
5743                 # merge commit
5744                 $formats_nav .=
5745                         '(merge: ' .
5746                         join(' ', map {
5747                                 $cgi->a({-href => href(action=>"commit",
5748                                                        hash=>$_)},
5749                                         esc_html(substr($_, 0, 7)));
5750                         } @$parents ) .
5751                         ')';
5752         }
5753         if (gitweb_check_feature('patches') && @$parents <= 1) {
5754                 $formats_nav .= " | " .
5755                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5756                                 "patch");
5757         }
5758
5759         if (!defined $parent) {
5760                 $parent = "--root";
5761         }
5762         my @difftree;
5763         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5764                 @diff_opts,
5765                 (@$parents <= 1 ? $parent : '-c'),
5766                 $hash, "--"
5767                 or die_error(500, "Open git-diff-tree failed");
5768         @difftree = map { chomp; $_ } <$fd>;
5769         close $fd or die_error(404, "Reading git-diff-tree failed");
5770
5771         # non-textual hash id's can be cached
5772         my $expires;
5773         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5774                 $expires = "+1d";
5775         }
5776         my $refs = git_get_references();
5777         my $ref = format_ref_marker($refs, $co{'id'});
5778
5779         git_header_html(undef, $expires);
5780         git_print_page_nav('commit', '',
5781                            $hash, $co{'tree'}, $hash,
5782                            $formats_nav);
5783
5784         if (defined $co{'parent'}) {
5785                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5786         } else {
5787                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5788         }
5789         print "<div class=\"title_text\">\n" .
5790               "<table class=\"object_header\">\n";
5791         git_print_authorship_rows(\%co);
5792         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5793         print "<tr>" .
5794               "<td>tree</td>" .
5795               "<td class=\"sha1\">" .
5796               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5797                        class => "list"}, $co{'tree'}) .
5798               "</td>" .
5799               "<td class=\"link\">" .
5800               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5801                       "tree");
5802         my $snapshot_links = format_snapshot_links($hash);
5803         if (defined $snapshot_links) {
5804                 print " | " . $snapshot_links;
5805         }
5806         print "</td>" .
5807               "</tr>\n";
5808
5809         foreach my $par (@$parents) {
5810                 print "<tr>" .
5811                       "<td>parent</td>" .
5812                       "<td class=\"sha1\">" .
5813                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5814                                class => "list"}, $par) .
5815                       "</td>" .
5816                       "<td class=\"link\">" .
5817                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5818                       " | " .
5819                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5820                       "</td>" .
5821                       "</tr>\n";
5822         }
5823         print "</table>".
5824               "</div>\n";
5825
5826         print "<div class=\"page_body\">\n";
5827         git_print_log($co{'comment'});
5828         print "</div>\n";
5829
5830         git_difftree_body(\@difftree, $hash, @$parents);
5831
5832         git_footer_html();
5833 }
5834
5835 sub git_object {
5836         # object is defined by:
5837         # - hash or hash_base alone
5838         # - hash_base and file_name
5839         my $type;
5840
5841         # - hash or hash_base alone
5842         if ($hash || ($hash_base && !defined $file_name)) {
5843                 my $object_id = $hash || $hash_base;
5844
5845                 open my $fd, "-|", quote_command(
5846                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5847                         or die_error(404, "Object does not exist");
5848                 $type = <$fd>;
5849                 chomp $type;
5850                 close $fd
5851                         or die_error(404, "Object does not exist");
5852
5853         # - hash_base and file_name
5854         } elsif ($hash_base && defined $file_name) {
5855                 $file_name =~ s,/+$,,;
5856
5857                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5858                         or die_error(404, "Base object does not exist");
5859
5860                 # here errors should not hapen
5861                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5862                         or die_error(500, "Open git-ls-tree failed");
5863                 my $line = <$fd>;
5864                 close $fd;
5865
5866                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5867                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5868                         die_error(404, "File or directory for given base does not exist");
5869                 }
5870                 $type = $2;
5871                 $hash = $3;
5872         } else {
5873                 die_error(400, "Not enough information to find object");
5874         }
5875
5876         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5877                                           hash=>$hash, hash_base=>$hash_base,
5878                                           file_name=>$file_name),
5879                              -status => '302 Found');
5880 }
5881
5882 sub git_blobdiff {
5883         my $format = shift || 'html';
5884
5885         my $fd;
5886         my @difftree;
5887         my %diffinfo;
5888         my $expires;
5889
5890         # preparing $fd and %diffinfo for git_patchset_body
5891         # new style URI
5892         if (defined $hash_base && defined $hash_parent_base) {
5893                 if (defined $file_name) {
5894                         # read raw output
5895                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5896                                 $hash_parent_base, $hash_base,
5897                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5898                                 or die_error(500, "Open git-diff-tree failed");
5899                         @difftree = map { chomp; $_ } <$fd>;
5900                         close $fd
5901                                 or die_error(404, "Reading git-diff-tree failed");
5902                         @difftree
5903                                 or die_error(404, "Blob diff not found");
5904
5905                 } elsif (defined $hash &&
5906                          $hash =~ /[0-9a-fA-F]{40}/) {
5907                         # try to find filename from $hash
5908
5909                         # read filtered raw output
5910                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5911                                 $hash_parent_base, $hash_base, "--"
5912                                 or die_error(500, "Open git-diff-tree failed");
5913                         @difftree =
5914                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5915                                 # $hash == to_id
5916                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5917                                 map { chomp; $_ } <$fd>;
5918                         close $fd
5919                                 or die_error(404, "Reading git-diff-tree failed");
5920                         @difftree
5921                                 or die_error(404, "Blob diff not found");
5922
5923                 } else {
5924                         die_error(400, "Missing one of the blob diff parameters");
5925                 }
5926
5927                 if (@difftree > 1) {
5928                         die_error(400, "Ambiguous blob diff specification");
5929                 }
5930
5931                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5932                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5933                 $file_name   ||= $diffinfo{'to_file'};
5934
5935                 $hash_parent ||= $diffinfo{'from_id'};
5936                 $hash        ||= $diffinfo{'to_id'};
5937
5938                 # non-textual hash id's can be cached
5939                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5940                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5941                         $expires = '+1d';
5942                 }
5943
5944                 # open patch output
5945                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5946                         '-p', ($format eq 'html' ? "--full-index" : ()),
5947                         $hash_parent_base, $hash_base,
5948                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5949                         or die_error(500, "Open git-diff-tree failed");
5950         }
5951
5952         # old/legacy style URI -- not generated anymore since 1.4.3.
5953         if (!%diffinfo) {
5954                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5955         }
5956
5957         # header
5958         if ($format eq 'html') {
5959                 my $formats_nav =
5960                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5961                                 "raw");
5962                 git_header_html(undef, $expires);
5963                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5964                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5965                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5966                 } else {
5967                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5968                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5969                 }
5970                 if (defined $file_name) {
5971                         git_print_page_path($file_name, "blob", $hash_base);
5972                 } else {
5973                         print "<div class=\"page_path\"></div>\n";
5974                 }
5975
5976         } elsif ($format eq 'plain') {
5977                 print $cgi->header(
5978                         -type => 'text/plain',
5979                         -charset => 'utf-8',
5980                         -expires => $expires,
5981                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5982
5983                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5984
5985         } else {
5986                 die_error(400, "Unknown blobdiff format");
5987         }
5988
5989         # patch
5990         if ($format eq 'html') {
5991                 print "<div class=\"page_body\">\n";
5992
5993                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5994                 close $fd;
5995
5996                 print "</div>\n"; # class="page_body"
5997                 git_footer_html();
5998
5999         } else {
6000                 while (my $line = <$fd>) {
6001                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6002                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6003
6004                         print $line;
6005
6006                         last if $line =~ m!^\+\+\+!;
6007                 }
6008                 local $/ = undef;
6009                 print <$fd>;
6010                 close $fd;
6011         }
6012 }
6013
6014 sub git_blobdiff_plain {
6015         git_blobdiff('plain');
6016 }
6017
6018 sub git_commitdiff {
6019         my %params = @_;
6020         my $format = $params{-format} || 'html';
6021
6022         my ($patch_max) = gitweb_get_feature('patches');
6023         if ($format eq 'patch') {
6024                 die_error(403, "Patch view not allowed") unless $patch_max;
6025         }
6026
6027         $hash ||= $hash_base || "HEAD";
6028         my %co = parse_commit($hash)
6029             or die_error(404, "Unknown commit object");
6030
6031         # choose format for commitdiff for merge
6032         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6033                 $hash_parent = '--cc';
6034         }
6035         # we need to prepare $formats_nav before almost any parameter munging
6036         my $formats_nav;
6037         if ($format eq 'html') {
6038                 $formats_nav =
6039                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6040                                 "raw");
6041                 if ($patch_max && @{$co{'parents'}} <= 1) {
6042                         $formats_nav .= " | " .
6043                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6044                                         "patch");
6045                 }
6046
6047                 if (defined $hash_parent &&
6048                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6049                         # commitdiff with two commits given
6050                         my $hash_parent_short = $hash_parent;
6051                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6052                                 $hash_parent_short = substr($hash_parent, 0, 7);
6053                         }
6054                         $formats_nav .=
6055                                 ' (from';
6056                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6057                                 if ($co{'parents'}[$i] eq $hash_parent) {
6058                                         $formats_nav .= ' parent ' . ($i+1);
6059                                         last;
6060                                 }
6061                         }
6062                         $formats_nav .= ': ' .
6063                                 $cgi->a({-href => href(action=>"commitdiff",
6064                                                        hash=>$hash_parent)},
6065                                         esc_html($hash_parent_short)) .
6066                                 ')';
6067                 } elsif (!$co{'parent'}) {
6068                         # --root commitdiff
6069                         $formats_nav .= ' (initial)';
6070                 } elsif (scalar @{$co{'parents'}} == 1) {
6071                         # single parent commit
6072                         $formats_nav .=
6073                                 ' (parent: ' .
6074                                 $cgi->a({-href => href(action=>"commitdiff",
6075                                                        hash=>$co{'parent'})},
6076                                         esc_html(substr($co{'parent'}, 0, 7))) .
6077                                 ')';
6078                 } else {
6079                         # merge commit
6080                         if ($hash_parent eq '--cc') {
6081                                 $formats_nav .= ' | ' .
6082                                         $cgi->a({-href => href(action=>"commitdiff",
6083                                                                hash=>$hash, hash_parent=>'-c')},
6084                                                 'combined');
6085                         } else { # $hash_parent eq '-c'
6086                                 $formats_nav .= ' | ' .
6087                                         $cgi->a({-href => href(action=>"commitdiff",
6088                                                                hash=>$hash, hash_parent=>'--cc')},
6089                                                 'compact');
6090                         }
6091                         $formats_nav .=
6092                                 ' (merge: ' .
6093                                 join(' ', map {
6094                                         $cgi->a({-href => href(action=>"commitdiff",
6095                                                                hash=>$_)},
6096                                                 esc_html(substr($_, 0, 7)));
6097                                 } @{$co{'parents'}} ) .
6098                                 ')';
6099                 }
6100         }
6101
6102         my $hash_parent_param = $hash_parent;
6103         if (!defined $hash_parent_param) {
6104                 # --cc for multiple parents, --root for parentless
6105                 $hash_parent_param =
6106                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6107         }
6108
6109         # read commitdiff
6110         my $fd;
6111         my @difftree;
6112         if ($format eq 'html') {
6113                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6114                         "--no-commit-id", "--patch-with-raw", "--full-index",
6115                         $hash_parent_param, $hash, "--"
6116                         or die_error(500, "Open git-diff-tree failed");
6117
6118                 while (my $line = <$fd>) {
6119                         chomp $line;
6120                         # empty line ends raw part of diff-tree output
6121                         last unless $line;
6122                         push @difftree, scalar parse_difftree_raw_line($line);
6123                 }
6124
6125         } elsif ($format eq 'plain') {
6126                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6127                         '-p', $hash_parent_param, $hash, "--"
6128                         or die_error(500, "Open git-diff-tree failed");
6129         } elsif ($format eq 'patch') {
6130                 # For commit ranges, we limit the output to the number of
6131                 # patches specified in the 'patches' feature.
6132                 # For single commits, we limit the output to a single patch,
6133                 # diverging from the git-format-patch default.
6134                 my @commit_spec = ();
6135                 if ($hash_parent) {
6136                         if ($patch_max > 0) {
6137                                 push @commit_spec, "-$patch_max";
6138                         }
6139                         push @commit_spec, '-n', "$hash_parent..$hash";
6140                 } else {
6141                         if ($params{-single}) {
6142                                 push @commit_spec, '-1';
6143                         } else {
6144                                 if ($patch_max > 0) {
6145                                         push @commit_spec, "-$patch_max";
6146                                 }
6147                                 push @commit_spec, "-n";
6148                         }
6149                         push @commit_spec, '--root', $hash;
6150                 }
6151                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6152                         '--stdout', @commit_spec
6153                         or die_error(500, "Open git-format-patch failed");
6154         } else {
6155                 die_error(400, "Unknown commitdiff format");
6156         }
6157
6158         # non-textual hash id's can be cached
6159         my $expires;
6160         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6161                 $expires = "+1d";
6162         }
6163
6164         # write commit message
6165         if ($format eq 'html') {
6166                 my $refs = git_get_references();
6167                 my $ref = format_ref_marker($refs, $co{'id'});
6168
6169                 git_header_html(undef, $expires);
6170                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6171                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6172                 print "<div class=\"title_text\">\n" .
6173                       "<table class=\"object_header\">\n";
6174                 git_print_authorship_rows(\%co);
6175                 print "</table>".
6176                       "</div>\n";
6177                 print "<div class=\"page_body\">\n";
6178                 if (@{$co{'comment'}} > 1) {
6179                         print "<div class=\"log\">\n";
6180                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6181                         print "</div>\n"; # class="log"
6182                 }
6183
6184         } elsif ($format eq 'plain') {
6185                 my $refs = git_get_references("tags");
6186                 my $tagname = git_get_rev_name_tags($hash);
6187                 my $filename = basename($project) . "-$hash.patch";
6188
6189                 print $cgi->header(
6190                         -type => 'text/plain',
6191                         -charset => 'utf-8',
6192                         -expires => $expires,
6193                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6194                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6195                 print "From: " . to_utf8($co{'author'}) . "\n";
6196                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6197                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6198
6199                 print "X-Git-Tag: $tagname\n" if $tagname;
6200                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6201
6202                 foreach my $line (@{$co{'comment'}}) {
6203                         print to_utf8($line) . "\n";
6204                 }
6205                 print "---\n\n";
6206         } elsif ($format eq 'patch') {
6207                 my $filename = basename($project) . "-$hash.patch";
6208
6209                 print $cgi->header(
6210                         -type => 'text/plain',
6211                         -charset => 'utf-8',
6212                         -expires => $expires,
6213                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6214         }
6215
6216         # write patch
6217         if ($format eq 'html') {
6218                 my $use_parents = !defined $hash_parent ||
6219                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6220                 git_difftree_body(\@difftree, $hash,
6221                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6222                 print "<br/>\n";
6223
6224                 git_patchset_body($fd, \@difftree, $hash,
6225                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6226                 close $fd;
6227                 print "</div>\n"; # class="page_body"
6228                 git_footer_html();
6229
6230         } elsif ($format eq 'plain') {
6231                 local $/ = undef;
6232                 print <$fd>;
6233                 close $fd
6234                         or print "Reading git-diff-tree failed\n";
6235         } elsif ($format eq 'patch') {
6236                 local $/ = undef;
6237                 print <$fd>;
6238                 close $fd
6239                         or print "Reading git-format-patch failed\n";
6240         }
6241 }
6242
6243 sub git_commitdiff_plain {
6244         git_commitdiff(-format => 'plain');
6245 }
6246
6247 # format-patch-style patches
6248 sub git_patch {
6249         git_commitdiff(-format => 'patch', -single => 1);
6250 }
6251
6252 sub git_patches {
6253         git_commitdiff(-format => 'patch');
6254 }
6255
6256 sub git_history {
6257         git_log_generic('history', \&git_history_body,
6258                         $hash_base, $hash_parent_base,
6259                         $file_name, $hash);
6260 }
6261
6262 sub git_search {
6263         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6264         if (!defined $searchtext) {
6265                 die_error(400, "Text field is empty");
6266         }
6267         if (!defined $hash) {
6268                 $hash = git_get_head_hash($project);
6269         }
6270         my %co = parse_commit($hash);
6271         if (!%co) {
6272                 die_error(404, "Unknown commit object");
6273         }
6274         if (!defined $page) {
6275                 $page = 0;
6276         }
6277
6278         $searchtype ||= 'commit';
6279         if ($searchtype eq 'pickaxe') {
6280                 # pickaxe may take all resources of your box and run for several minutes
6281                 # with every query - so decide by yourself how public you make this feature
6282                 gitweb_check_feature('pickaxe')
6283                     or die_error(403, "Pickaxe is disabled");
6284         }
6285         if ($searchtype eq 'grep') {
6286                 gitweb_check_feature('grep')
6287                     or die_error(403, "Grep is disabled");
6288         }
6289
6290         git_header_html();
6291
6292         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6293                 my $greptype;
6294                 if ($searchtype eq 'commit') {
6295                         $greptype = "--grep=";
6296                 } elsif ($searchtype eq 'author') {
6297                         $greptype = "--author=";
6298                 } elsif ($searchtype eq 'committer') {
6299                         $greptype = "--committer=";
6300                 }
6301                 $greptype .= $searchtext;
6302                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6303                                                $greptype, '--regexp-ignore-case',
6304                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6305
6306                 my $paging_nav = '';
6307                 if ($page > 0) {
6308                         $paging_nav .=
6309                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6310                                                        searchtext=>$searchtext,
6311                                                        searchtype=>$searchtype)},
6312                                         "first");
6313                         $paging_nav .= " &sdot; " .
6314                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6315                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6316                 } else {
6317                         $paging_nav .= "first";
6318                         $paging_nav .= " &sdot; prev";
6319                 }
6320                 my $next_link = '';
6321                 if ($#commitlist >= 100) {
6322                         $next_link =
6323                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6324                                          -accesskey => "n", -title => "Alt-n"}, "next");
6325                         $paging_nav .= " &sdot; $next_link";
6326                 } else {
6327                         $paging_nav .= " &sdot; next";
6328                 }
6329
6330                 if ($#commitlist >= 100) {
6331                 }
6332
6333                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6334                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6335                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6336         }
6337
6338         if ($searchtype eq 'pickaxe') {
6339                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6340                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6341
6342                 print "<table class=\"pickaxe search\">\n";
6343                 my $alternate = 1;
6344                 local $/ = "\n";
6345                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6346                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6347                         ($search_use_regexp ? '--pickaxe-regex' : ());
6348                 undef %co;
6349                 my @files;
6350                 while (my $line = <$fd>) {
6351                         chomp $line;
6352                         next unless $line;
6353
6354                         my %set = parse_difftree_raw_line($line);
6355                         if (defined $set{'commit'}) {
6356                                 # finish previous commit
6357                                 if (%co) {
6358                                         print "</td>\n" .
6359                                               "<td class=\"link\">" .
6360                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6361                                               " | " .
6362                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6363                                         print "</td>\n" .
6364                                               "</tr>\n";
6365                                 }
6366
6367                                 if ($alternate) {
6368                                         print "<tr class=\"dark\">\n";
6369                                 } else {
6370                                         print "<tr class=\"light\">\n";
6371                                 }
6372                                 $alternate ^= 1;
6373                                 %co = parse_commit($set{'commit'});
6374                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6375                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6376                                       "<td><i>$author</i></td>\n" .
6377                                       "<td>" .
6378                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6379                                               -class => "list subject"},
6380                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6381                         } elsif (defined $set{'to_id'}) {
6382                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6383
6384                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6385                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6386                                               -class => "list"},
6387                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6388                                       "<br/>\n";
6389                         }
6390                 }
6391                 close $fd;
6392
6393                 # finish last commit (warning: repetition!)
6394                 if (%co) {
6395                         print "</td>\n" .
6396                               "<td class=\"link\">" .
6397                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6398                               " | " .
6399                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6400                         print "</td>\n" .
6401                               "</tr>\n";
6402                 }
6403
6404                 print "</table>\n";
6405         }
6406
6407         if ($searchtype eq 'grep') {
6408                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6409                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6410
6411                 print "<table class=\"grep_search\">\n";
6412                 my $alternate = 1;
6413                 my $matches = 0;
6414                 local $/ = "\n";
6415                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6416                         $search_use_regexp ? ('-E', '-i') : '-F',
6417                         $searchtext, $co{'tree'};
6418                 my $lastfile = '';
6419                 while (my $line = <$fd>) {
6420                         chomp $line;
6421                         my ($file, $lno, $ltext, $binary);
6422                         last if ($matches++ > 1000);
6423                         if ($line =~ /^Binary file (.+) matches$/) {
6424                                 $file = $1;
6425                                 $binary = 1;
6426                         } else {
6427                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6428                         }
6429                         if ($file ne $lastfile) {
6430                                 $lastfile and print "</td></tr>\n";
6431                                 if ($alternate++) {
6432                                         print "<tr class=\"dark\">\n";
6433                                 } else {
6434                                         print "<tr class=\"light\">\n";
6435                                 }
6436                                 print "<td class=\"list\">".
6437                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6438                                                                file_name=>"$file"),
6439                                                 -class => "list"}, esc_path($file));
6440                                 print "</td><td>\n";
6441                                 $lastfile = $file;
6442                         }
6443                         if ($binary) {
6444                                 print "<div class=\"binary\">Binary file</div>\n";
6445                         } else {
6446                                 $ltext = untabify($ltext);
6447                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6448                                         $ltext = esc_html($1, -nbsp=>1);
6449                                         $ltext .= '<span class="match">';
6450                                         $ltext .= esc_html($2, -nbsp=>1);
6451                                         $ltext .= '</span>';
6452                                         $ltext .= esc_html($3, -nbsp=>1);
6453                                 } else {
6454                                         $ltext = esc_html($ltext, -nbsp=>1);
6455                                 }
6456                                 print "<div class=\"pre\">" .
6457                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6458                                                                file_name=>"$file").'#l'.$lno,
6459                                                 -class => "linenr"}, sprintf('%4i', $lno))
6460                                         . ' ' .  $ltext . "</div>\n";
6461                         }
6462                 }
6463                 if ($lastfile) {
6464                         print "</td></tr>\n";
6465                         if ($matches > 1000) {
6466                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6467                         }
6468                 } else {
6469                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6470                 }
6471                 close $fd;
6472
6473                 print "</table>\n";
6474         }
6475         git_footer_html();
6476 }
6477
6478 sub git_search_help {
6479         git_header_html();
6480         git_print_page_nav('','', $hash,$hash,$hash);
6481         print <<EOT;
6482 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6483 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6484 the pattern entered is recognized as the POSIX extended
6485 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6486 insensitive).</p>
6487 <dl>
6488 <dt><b>commit</b></dt>
6489 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6490 EOT
6491         my $have_grep = gitweb_check_feature('grep');
6492         if ($have_grep) {
6493                 print <<EOT;
6494 <dt><b>grep</b></dt>
6495 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6496     a different one) are searched for the given pattern. On large trees, this search can take
6497 a while and put some strain on the server, so please use it with some consideration. Note that
6498 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6499 case-sensitive.</dd>
6500 EOT
6501         }
6502         print <<EOT;
6503 <dt><b>author</b></dt>
6504 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6505 <dt><b>committer</b></dt>
6506 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6507 EOT
6508         my $have_pickaxe = gitweb_check_feature('pickaxe');
6509         if ($have_pickaxe) {
6510                 print <<EOT;
6511 <dt><b>pickaxe</b></dt>
6512 <dd>All commits that caused the string to appear or disappear from any file (changes that
6513 added, removed or "modified" the string) will be listed. This search can take a while and
6514 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6515 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6516 EOT
6517         }
6518         print "</dl>\n";
6519         git_footer_html();
6520 }
6521
6522 sub git_shortlog {
6523         git_log_generic('shortlog', \&git_shortlog_body,
6524                         $hash, $hash_parent);
6525 }
6526
6527 ## ......................................................................
6528 ## feeds (RSS, Atom; OPML)
6529
6530 sub git_feed {
6531         my $format = shift || 'atom';
6532         my $have_blame = gitweb_check_feature('blame');
6533
6534         # Atom: http://www.atomenabled.org/developers/syndication/
6535         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6536         if ($format ne 'rss' && $format ne 'atom') {
6537                 die_error(400, "Unknown web feed format");
6538         }
6539
6540         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6541         my $head = $hash || 'HEAD';
6542         my @commitlist = parse_commits($head, 150, 0, $file_name);
6543
6544         my %latest_commit;
6545         my %latest_date;
6546         my $content_type = "application/$format+xml";
6547         if (defined $cgi->http('HTTP_ACCEPT') &&
6548                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6549                 # browser (feed reader) prefers text/xml
6550                 $content_type = 'text/xml';
6551         }
6552         if (defined($commitlist[0])) {
6553                 %latest_commit = %{$commitlist[0]};
6554                 my $latest_epoch = $latest_commit{'committer_epoch'};
6555                 %latest_date   = parse_date($latest_epoch);
6556                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6557                 if (defined $if_modified) {
6558                         my $since;
6559                         if (eval { require HTTP::Date; 1; }) {
6560                                 $since = HTTP::Date::str2time($if_modified);
6561                         } elsif (eval { require Time::ParseDate; 1; }) {
6562                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6563                         }
6564                         if (defined $since && $latest_epoch <= $since) {
6565                                 print $cgi->header(
6566                                         -type => $content_type,
6567                                         -charset => 'utf-8',
6568                                         -last_modified => $latest_date{'rfc2822'},
6569                                         -status => '304 Not Modified');
6570                                 return;
6571                         }
6572                 }
6573                 print $cgi->header(
6574                         -type => $content_type,
6575                         -charset => 'utf-8',
6576                         -last_modified => $latest_date{'rfc2822'});
6577         } else {
6578                 print $cgi->header(
6579                         -type => $content_type,
6580                         -charset => 'utf-8');
6581         }
6582
6583         # Optimization: skip generating the body if client asks only
6584         # for Last-Modified date.
6585         return if ($cgi->request_method() eq 'HEAD');
6586
6587         # header variables
6588         my $title = "$site_name - $project/$action";
6589         my $feed_type = 'log';
6590         if (defined $hash) {
6591                 $title .= " - '$hash'";
6592                 $feed_type = 'branch log';
6593                 if (defined $file_name) {
6594                         $title .= " :: $file_name";
6595                         $feed_type = 'history';
6596                 }
6597         } elsif (defined $file_name) {
6598                 $title .= " - $file_name";
6599                 $feed_type = 'history';
6600         }
6601         $title .= " $feed_type";
6602         my $descr = git_get_project_description($project);
6603         if (defined $descr) {
6604                 $descr = esc_html($descr);
6605         } else {
6606                 $descr = "$project " .
6607                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6608                          " feed";
6609         }
6610         my $owner = git_get_project_owner($project);
6611         $owner = esc_html($owner);
6612
6613         #header
6614         my $alt_url;
6615         if (defined $file_name) {
6616                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6617         } elsif (defined $hash) {
6618                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6619         } else {
6620                 $alt_url = href(-full=>1, action=>"summary");
6621         }
6622         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6623         if ($format eq 'rss') {
6624                 print <<XML;
6625 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6626 <channel>
6627 XML
6628                 print "<title>$title</title>\n" .
6629                       "<link>$alt_url</link>\n" .
6630                       "<description>$descr</description>\n" .
6631                       "<language>en</language>\n" .
6632                       # project owner is responsible for 'editorial' content
6633                       "<managingEditor>$owner</managingEditor>\n";
6634                 if (defined $logo || defined $favicon) {
6635                         # prefer the logo to the favicon, since RSS
6636                         # doesn't allow both
6637                         my $img = esc_url($logo || $favicon);
6638                         print "<image>\n" .
6639                               "<url>$img</url>\n" .
6640                               "<title>$title</title>\n" .
6641                               "<link>$alt_url</link>\n" .
6642                               "</image>\n";
6643                 }
6644                 if (%latest_date) {
6645                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6646                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6647                 }
6648                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6649         } elsif ($format eq 'atom') {
6650                 print <<XML;
6651 <feed xmlns="http://www.w3.org/2005/Atom">
6652 XML
6653                 print "<title>$title</title>\n" .
6654                       "<subtitle>$descr</subtitle>\n" .
6655                       '<link rel="alternate" type="text/html" href="' .
6656                       $alt_url . '" />' . "\n" .
6657                       '<link rel="self" type="' . $content_type . '" href="' .
6658                       $cgi->self_url() . '" />' . "\n" .
6659                       "<id>" . href(-full=>1) . "</id>\n" .
6660                       # use project owner for feed author
6661                       "<author><name>$owner</name></author>\n";
6662                 if (defined $favicon) {
6663                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6664                 }
6665                 if (defined $logo_url) {
6666                         # not twice as wide as tall: 72 x 27 pixels
6667                         print "<logo>" . esc_url($logo) . "</logo>\n";
6668                 }
6669                 if (! %latest_date) {
6670                         # dummy date to keep the feed valid until commits trickle in:
6671                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6672                 } else {
6673                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6674                 }
6675                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6676         }
6677
6678         # contents
6679         for (my $i = 0; $i <= $#commitlist; $i++) {
6680                 my %co = %{$commitlist[$i]};
6681                 my $commit = $co{'id'};
6682                 # we read 150, we always show 30 and the ones more recent than 48 hours
6683                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6684                         last;
6685                 }
6686                 my %cd = parse_date($co{'author_epoch'});
6687
6688                 # get list of changed files
6689                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6690                         $co{'parent'} || "--root",
6691                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6692                         or next;
6693                 my @difftree = map { chomp; $_ } <$fd>;
6694                 close $fd
6695                         or next;
6696
6697                 # print element (entry, item)
6698                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6699                 if ($format eq 'rss') {
6700                         print "<item>\n" .
6701                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6702                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6703                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6704                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6705                               "<link>$co_url</link>\n" .
6706                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6707                               "<content:encoded>" .
6708                               "<![CDATA[\n";
6709                 } elsif ($format eq 'atom') {
6710                         print "<entry>\n" .
6711                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6712                               "<updated>$cd{'iso-8601'}</updated>\n" .
6713                               "<author>\n" .
6714                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6715                         if ($co{'author_email'}) {
6716                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6717                         }
6718                         print "</author>\n" .
6719                               # use committer for contributor
6720                               "<contributor>\n" .
6721                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6722                         if ($co{'committer_email'}) {
6723                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6724                         }
6725                         print "</contributor>\n" .
6726                               "<published>$cd{'iso-8601'}</published>\n" .
6727                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6728                               "<id>$co_url</id>\n" .
6729                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6730                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6731                 }
6732                 my $comment = $co{'comment'};
6733                 print "<pre>\n";
6734                 foreach my $line (@$comment) {
6735                         $line = esc_html($line);
6736                         print "$line\n";
6737                 }
6738                 print "</pre><ul>\n";
6739                 foreach my $difftree_line (@difftree) {
6740                         my %difftree = parse_difftree_raw_line($difftree_line);
6741                         next if !$difftree{'from_id'};
6742
6743                         my $file = $difftree{'file'} || $difftree{'to_file'};
6744
6745                         print "<li>" .
6746                               "[" .
6747                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6748                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6749                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6750                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6751                                       -title => "diff"}, 'D');
6752                         if ($have_blame) {
6753                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6754                                                              file_name=>$file, hash_base=>$commit),
6755                                               -title => "blame"}, 'B');
6756                         }
6757                         # if this is not a feed of a file history
6758                         if (!defined $file_name || $file_name ne $file) {
6759                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6760                                                              file_name=>$file, hash=>$commit),
6761                                               -title => "history"}, 'H');
6762                         }
6763                         $file = esc_path($file);
6764                         print "] ".
6765                               "$file</li>\n";
6766                 }
6767                 if ($format eq 'rss') {
6768                         print "</ul>]]>\n" .
6769                               "</content:encoded>\n" .
6770                               "</item>\n";
6771                 } elsif ($format eq 'atom') {
6772                         print "</ul>\n</div>\n" .
6773                               "</content>\n" .
6774                               "</entry>\n";
6775                 }
6776         }
6777
6778         # end of feed
6779         if ($format eq 'rss') {
6780                 print "</channel>\n</rss>\n";
6781         } elsif ($format eq 'atom') {
6782                 print "</feed>\n";
6783         }
6784 }
6785
6786 sub git_rss {
6787         git_feed('rss');
6788 }
6789
6790 sub git_atom {
6791         git_feed('atom');
6792 }
6793
6794 sub git_opml {
6795         my @list = git_get_projects_list();
6796
6797         print $cgi->header(
6798                 -type => 'text/xml',
6799                 -charset => 'utf-8',
6800                 -content_disposition => 'inline; filename="opml.xml"');
6801
6802         print <<XML;
6803 <?xml version="1.0" encoding="utf-8"?>
6804 <opml version="1.0">
6805 <head>
6806   <title>$site_name OPML Export</title>
6807 </head>
6808 <body>
6809 <outline text="git RSS feeds">
6810 XML
6811
6812         foreach my $pr (@list) {
6813                 my %proj = %$pr;
6814                 my $head = git_get_head_hash($proj{'path'});
6815                 if (!defined $head) {
6816                         next;
6817                 }
6818                 $git_dir = "$projectroot/$proj{'path'}";
6819                 my %co = parse_commit($head);
6820                 if (!%co) {
6821                         next;
6822                 }
6823
6824                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6825                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6826                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6827                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6828         }
6829         print <<XML;
6830 </outline>
6831 </body>
6832 </opml>
6833 XML
6834 }