Lady’s Gitweb - Gitweb/blob - 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
  96 # URI of GIT logo (72x27 size)
  97 our $logo = "++GITWEB_LOGO++";
  98 # URI of GIT favicon, assumed to be image/png type
  99 our $favicon = "++GITWEB_FAVICON++";
 100 # URI of gitweb.js (JavaScript code for gitweb)
 101 our $javascript = "++GITWEB_JS++";
 102
 103 # URI and label (title) of GIT logo link
 104 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 105 #our $logo_label = "git documentation";
 106 our $logo_url = "http://git-scm.com/";
 107 our $logo_label = "git homepage";
 108
 109 # source of projects list
 110 our $projects_list = "++GITWEB_LIST++";
 111
 112 # the width (in characters) of the projects list "Description" column
 113 our $projects_list_description_width = 25;
 114
 115 # default order of projects list
 116 # valid values are none, project, descr, owner, and age
 117 our $default_projects_order = "project";
 118
 119 # show repository only if this file exists
 120 # (only effective if this variable evaluates to true)
 121 our $export_ok = "++GITWEB_EXPORT_OK++";
 122
 123 # show repository only if this subroutine returns true
 124 # when given the path to the project, for example:
 125 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 126 our $export_auth_hook = undef;
 127
 128 # only allow viewing of repositories also shown on the overview page
 129 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 130
 131 # list of git base URLs used for URL to where fetch project from,
 132 # i.e. full URL is "$git_base_url/$project"
 133 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 134
 135 # default blob_plain mimetype and default charset for text/plain blob
 136 our $default_blob_plain_mimetype = 'text/plain';
 137 our $default_text_plain_charset  = undef;
 138
 139 # file to use for guessing MIME types before trying /etc/mime.types
 140 # (relative to the current git repository)
 141 our $mimetypes_file = undef;
 142
 143 # assume this charset if line contains non-UTF-8 characters;
 144 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 145 # for which encoding all byte sequences are valid, for example
 146 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 147 # could be even 'utf-8' for the old behavior)
 148 our $fallback_encoding = 'latin1';
 149
 150 # rename detection options for git-diff and git-diff-tree
 151 # - default is '-M', with the cost proportional to
 152 #   (number of removed files) * (number of new files).
 153 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 154 #   (number of changed files + number of removed files) * (number of new files)
 155 # - even more costly is '-C', '--find-copies-harder' with cost
 156 #   (number of files in the original tree) * (number of new files)
 157 # - one might want to include '-B' option, e.g. '-B', '-M'
 158 our @diff_opts = ('-M'); # taken from git_commit
 159
 160 # Disables features that would allow repository owners to inject script into
 161 # the gitweb domain.
 162 our $prevent_xss = 0;
 163
 164 # information about snapshot formats that gitweb is capable of serving
 165 our %known_snapshot_formats = (
 166         # name => {
 167         #       'display' => display name,
 168         #       'type' => mime type,
 169         #       'suffix' => filename suffix,
 170         #       'format' => --format for git-archive,
 171         #       'compressor' => [compressor command and arguments]
 172         #                       (array reference, optional)
 173         #       'disabled' => boolean (optional)}
 174         #
 175         'tgz' => {
 176                 'display' => 'tar.gz',
 177                 'type' => 'application/x-gzip',
 178                 'suffix' => '.tar.gz',
 179                 'format' => 'tar',
 180                 'compressor' => ['gzip']},
 181
 182         'tbz2' => {
 183                 'display' => 'tar.bz2',
 184                 'type' => 'application/x-bzip2',
 185                 'suffix' => '.tar.bz2',
 186                 'format' => 'tar',
 187                 'compressor' => ['bzip2']},
 188
 189         'txz' => {
 190                 'display' => 'tar.xz',
 191                 'type' => 'application/x-xz',
 192                 'suffix' => '.tar.xz',
 193                 'format' => 'tar',
 194                 'compressor' => ['xz'],
 195                 'disabled' => 1},
 196
 197         'zip' => {
 198                 'display' => 'zip',
 199                 'type' => 'application/x-zip',
 200                 'suffix' => '.zip',
 201                 'format' => 'zip'},
 202 );
 203
 204 # Aliases so we understand old gitweb.snapshot values in repository
 205 # configuration.
 206 our %known_snapshot_format_aliases = (
 207         'gzip'  => 'tgz',
 208         'bzip2' => 'tbz2',
 209         'xz'    => 'txz',
 210
 211         # backward compatibility: legacy gitweb config support
 212         'x-gzip' => undef, 'gz' => undef,
 213         'x-bzip2' => undef, 'bz2' => undef,
 214         'x-zip' => undef, '' => undef,
 215 );
 216
 217 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 218 # are changed, it may be appropriate to change these values too via
 219 # $GITWEB_CONFIG.
 220 our %avatar_size = (
 221         'default' => 16,
 222         'double'  => 32
 223 );
 224
 225 # Used to set the maximum load that we will still respond to gitweb queries.
 226 # If server load exceed this value then return "503 server busy" error.
 227 # If gitweb cannot determined server load, it is taken to be 0.
 228 # Leave it undefined (or set to 'undef') to turn off load checking.
 229 our $maxload = 300;
 230
 231 # You define site-wide feature defaults here; override them with
 232 # $GITWEB_CONFIG as necessary.
 233 our %feature = (
 234         # feature => {
 235         #       'sub' => feature-sub (subroutine),
 236         #       'override' => allow-override (boolean),
 237         #       'default' => [ default options...] (array reference)}
 238         #
 239         # if feature is overridable (it means that allow-override has true value),
 240         # then feature-sub will be called with default options as parameters;
 241         # return value of feature-sub indicates if to enable specified feature
 242         #
 243         # if there is no 'sub' key (no feature-sub), then feature cannot be
 244         # overriden
 245         #
 246         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 247         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 248         # is enabled
 249
 250         # Enable the 'blame' blob view, showing the last commit that modified
 251         # each line in the file. This can be very CPU-intensive.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'blame'}{'default'} = [1];
 255         # To have project specific config enable override in $GITWEB_CONFIG
 256         # $feature{'blame'}{'override'} = 1;
 257         # and in project config gitweb.blame = 0|1;
 258         'blame' => {
 259                 'sub' => sub { feature_bool('blame', @_) },
 260                 'override' => 0,
 261                 'default' => [0]},
 262
 263         # Enable the 'snapshot' link, providing a compressed archive of any
 264         # tree. This can potentially generate high traffic if you have large
 265         # project.
 266
 267         # Value is a list of formats defined in %known_snapshot_formats that
 268         # you wish to offer.
 269         # To disable system wide have in $GITWEB_CONFIG
 270         # $feature{'snapshot'}{'default'} = [];
 271         # To have project specific config enable override in $GITWEB_CONFIG
 272         # $feature{'snapshot'}{'override'} = 1;
 273         # and in project config, a comma-separated list of formats or "none"
 274         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 275         'snapshot' => {
 276                 'sub' => \&feature_snapshot,
 277                 'override' => 0,
 278                 'default' => ['tgz']},
 279
 280         # Enable text search, which will list the commits which match author,
 281         # committer or commit text to a given string.  Enabled by default.
 282         # Project specific override is not supported.
 283         'search' => {
 284                 'override' => 0,
 285                 'default' => [1]},
 286
 287         # Enable grep search, which will list the files in currently selected
 288         # tree containing the given string. Enabled by default. This can be
 289         # potentially CPU-intensive, of course.
 290
 291         # To enable system wide have in $GITWEB_CONFIG
 292         # $feature{'grep'}{'default'} = [1];
 293         # To have project specific config enable override in $GITWEB_CONFIG
 294         # $feature{'grep'}{'override'} = 1;
 295         # and in project config gitweb.grep = 0|1;
 296         'grep' => {
 297                 'sub' => sub { feature_bool('grep', @_) },
 298                 'override' => 0,
 299                 'default' => [1]},
 300
 301         # Enable the pickaxe search, which will list the commits that modified
 302         # a given string in a file. This can be practical and quite faster
 303         # alternative to 'blame', but still potentially CPU-intensive.
 304
 305         # To enable system wide have in $GITWEB_CONFIG
 306         # $feature{'pickaxe'}{'default'} = [1];
 307         # To have project specific config enable override in $GITWEB_CONFIG
 308         # $feature{'pickaxe'}{'override'} = 1;
 309         # and in project config gitweb.pickaxe = 0|1;
 310         'pickaxe' => {
 311                 'sub' => sub { feature_bool('pickaxe', @_) },
 312                 'override' => 0,
 313                 'default' => [1]},
 314
 315         # Enable showing size of blobs in a 'tree' view, in a separate
 316         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 317
 318         # To disable system wide have in $GITWEB_CONFIG
 319         # $feature{'show-sizes'}{'default'} = [0];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'show-sizes'}{'override'} = 1;
 322         # and in project config gitweb.showsizes = 0|1;
 323         'show-sizes' => {
 324                 'sub' => sub { feature_bool('showsizes', @_) },
 325                 'override' => 0,
 326                 'default' => [1]},
 327
 328         # Make gitweb use an alternative format of the URLs which can be
 329         # more readable and natural-looking: project name is embedded
 330         # directly in the path and the query string contains other
 331         # auxiliary information. All gitweb installations recognize
 332         # URL in either format; this configures in which formats gitweb
 333         # generates links.
 334
 335         # To enable system wide have in $GITWEB_CONFIG
 336         # $feature{'pathinfo'}{'default'} = [1];
 337         # Project specific override is not supported.
 338
 339         # Note that you will need to change the default location of CSS,
 340         # favicon, logo and possibly other files to an absolute URL. Also,
 341         # if gitweb.cgi serves as your indexfile, you will need to force
 342         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 343         'pathinfo' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Make gitweb consider projects in project root subdirectories
 348         # to be forks of existing projects. Given project $projname.git,
 349         # projects matching $projname/*.git will not be shown in the main
 350         # projects list, instead a '+' mark will be added to $projname
 351         # there and a 'forks' view will be enabled for the project, listing
 352         # all the forks. If project list is taken from a file, forks have
 353         # to be listed after the main project.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'forks'}{'default'} = [1];
 357         # Project specific override is not supported.
 358         'forks' => {
 359                 'override' => 0,
 360                 'default' => [0]},
 361
 362         # Insert custom links to the action bar of all project pages.
 363         # This enables you mainly to link to third-party scripts integrating
 364         # into gitweb; e.g. git-browser for graphical history representation
 365         # or custom web-based repository administration interface.
 366
 367         # The 'default' value consists of a list of triplets in the form
 368         # (label, link, position) where position is the label after which
 369         # to insert the link and link is a format string where %n expands
 370         # to the project name, %f to the project path within the filesystem,
 371         # %h to the current hash (h gitweb parameter) and %b to the current
 372         # hash base (hb gitweb parameter); %% expands to %.
 373
 374         # To enable system wide have in $GITWEB_CONFIG e.g.
 375         # $feature{'actions'}{'default'} = [('graphiclog',
 376         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 377         # Project specific override is not supported.
 378         'actions' => {
 379                 'override' => 0,
 380                 'default' => []},
 381
 382         # Allow gitweb scan project content tags described in ctags/
 383         # of project repository, and display the popular Web 2.0-ish
 384         # "tag cloud" near the project list. Note that this is something
 385         # COMPLETELY different from the normal Git tags.
 386
 387         # gitweb by itself can show existing tags, but it does not handle
 388         # tagging itself; you need an external application for that.
 389         # For an example script, check Girocco's cgi/tagproj.cgi.
 390         # You may want to install the HTML::TagCloud Perl module to get
 391         # a pretty tag cloud instead of just a list of tags.
 392
 393         # To enable system wide have in $GITWEB_CONFIG
 394         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 395         # Project specific override is not supported.
 396         'ctags' => {
 397                 'override' => 0,
 398                 'default' => [0]},
 399
 400         # The maximum number of patches in a patchset generated in patch
 401         # view. Set this to 0 or undef to disable patch view, or to a
 402         # negative number to remove any limit.
 403
 404         # To disable system wide have in $GITWEB_CONFIG
 405         # $feature{'patches'}{'default'} = [0];
 406         # To have project specific config enable override in $GITWEB_CONFIG
 407         # $feature{'patches'}{'override'} = 1;
 408         # and in project config gitweb.patches = 0|n;
 409         # where n is the maximum number of patches allowed in a patchset.
 410         'patches' => {
 411                 'sub' => \&feature_patches,
 412                 'override' => 0,
 413                 'default' => [16]},
 414
 415         # Avatar support. When this feature is enabled, views such as
 416         # shortlog or commit will display an avatar associated with
 417         # the email of the committer(s) and/or author(s).
 418
 419         # Currently available providers are gravatar and picon.
 420         # If an unknown provider is specified, the feature is disabled.
 421
 422         # Gravatar depends on Digest::MD5.
 423         # Picon currently relies on the indiana.edu database.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'avatar'}{'default'} = ['<provider>'];
 427         # where <provider> is either gravatar or picon.
 428         # To have project specific config enable override in $GITWEB_CONFIG
 429         # $feature{'avatar'}{'override'} = 1;
 430         # and in project config gitweb.avatar = <provider>;
 431         'avatar' => {
 432                 'sub' => \&feature_avatar,
 433                 'override' => 0,
 434                 'default' => ['']},
 435
 436         # Enable displaying how much time and how many git commands
 437         # it took to generate and display page.  Disabled by default.
 438         # Project specific override is not supported.
 439         'timed' => {
 440                 'override' => 0,
 441                 'default' => [0]},
 442
 443         # Enable turning some links into links to actions which require
 444         # JavaScript to run (like 'blame_incremental').  Not enabled by
 445         # default.  Project specific override is currently not supported.
 446         'javascript-actions' => {
 447                 'override' => 0,
 448                 'default' => [0]},
 449 );
 450
 451 sub gitweb_get_feature {
 452         my ($name) = @_;
 453         return unless exists $feature{$name};
 454         my ($sub, $override, @defaults) = (
 455                 $feature{$name}{'sub'},
 456                 $feature{$name}{'override'},
 457                 @{$feature{$name}{'default'}});
 458         # project specific override is possible only if we have project
 459         our $git_dir; # global variable, declared later
 460         if (!$override || !defined $git_dir) {
 461                 return @defaults;
 462         }
 463         if (!defined $sub) {
 464                 warn "feature $name is not overridable";
 465                 return @defaults;
 466         }
 467         return $sub->(@defaults);
 468 }
 469
 470 # A wrapper to check if a given feature is enabled.
 471 # With this, you can say
 472 #
 473 #   my $bool_feat = gitweb_check_feature('bool_feat');
 474 #   gitweb_check_feature('bool_feat') or somecode;
 475 #
 476 # instead of
 477 #
 478 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 479 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 480 #
 481 sub gitweb_check_feature {
 482         return (gitweb_get_feature(@_))[0];
 483 }
 484
 485
 486 sub feature_bool {
 487         my $key = shift;
 488         my ($val) = git_get_project_config($key, '--bool');
 489
 490         if (!defined $val) {
 491                 return ($_[0]);
 492         } elsif ($val eq 'true') {
 493                 return (1);
 494         } elsif ($val eq 'false') {
 495                 return (0);
 496         }
 497 }
 498
 499 sub feature_snapshot {
 500         my (@fmts) = @_;
 501
 502         my ($val) = git_get_project_config('snapshot');
 503
 504         if ($val) {
 505                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 506         }
 507
 508         return @fmts;
 509 }
 510
 511 sub feature_patches {
 512         my @val = (git_get_project_config('patches', '--int'));
 513
 514         if (@val) {
 515                 return @val;
 516         }
 517
 518         return ($_[0]);
 519 }
 520
 521 sub feature_avatar {
 522         my @val = (git_get_project_config('avatar'));
 523
 524         return @val ? @val : @_;
 525 }
 526
 527 # checking HEAD file with -e is fragile if the repository was
 528 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 529 # and then pruned.
 530 sub check_head_link {
 531         my ($dir) = @_;
 532         my $headfile = "$dir/HEAD";
 533         return ((-e $headfile) ||
 534                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 535 }
 536
 537 sub check_export_ok {
 538         my ($dir) = @_;
 539         return (check_head_link($dir) &&
 540                 (!$export_ok || -e "$dir/$export_ok") &&
 541                 (!$export_auth_hook || $export_auth_hook->($dir)));
 542 }
 543
 544 # process alternate names for backward compatibility
 545 # filter out unsupported (unknown) snapshot formats
 546 sub filter_snapshot_fmts {
 547         my @fmts = @_;
 548
 549         @fmts = map {
 550                 exists $known_snapshot_format_aliases{$_} ?
 551                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 552         @fmts = grep {
 553                 exists $known_snapshot_formats{$_} &&
 554                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 555 }
 556
 557 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 558 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 559 # die if there are errors parsing config file
 560 if (-e $GITWEB_CONFIG) {
 561         do $GITWEB_CONFIG;
 562         die $@ if $@;
 563 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 564         do $GITWEB_CONFIG_SYSTEM;
 565         die $@ if $@;
 566 }
 567
 568 # Get loadavg of system, to compare against $maxload.
 569 # Currently it requires '/proc/loadavg' present to get loadavg;
 570 # if it is not present it returns 0, which means no load checking.
 571 sub get_loadavg {
 572         if( -e '/proc/loadavg' ){
 573                 open my $fd, '<', '/proc/loadavg'
 574                         or return 0;
 575                 my @load = split(/\s+/, scalar <$fd>);
 576                 close $fd;
 577
 578                 # The first three columns measure CPU and IO utilization of the last one,
 579                 # five, and 10 minute periods.  The fourth column shows the number of
 580                 # currently running processes and the total number of processes in the m/n
 581                 # format.  The last column displays the last process ID used.
 582                 return $load[0] || 0;
 583         }
 584         # additional checks for load average should go here for things that don't export
 585         # /proc/loadavg
 586
 587         return 0;
 588 }
 589
 590 # version of the core git binary
 591 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 592 $number_of_git_cmds++;
 593
 594 $projects_list ||= $projectroot;
 595
 596 if (defined $maxload && get_loadavg() > $maxload) {
 597         die_error(503, "The load average on the server is too high");
 598 }
 599
 600 # ======================================================================
 601 # input validation and dispatch
 602
 603 # input parameters can be collected from a variety of sources (presently, CGI
 604 # and PATH_INFO), so we define an %input_params hash that collects them all
 605 # together during validation: this allows subsequent uses (e.g. href()) to be
 606 # agnostic of the parameter origin
 607
 608 our %input_params = ();
 609
 610 # input parameters are stored with the long parameter name as key. This will
 611 # also be used in the href subroutine to convert parameters to their CGI
 612 # equivalent, and since the href() usage is the most frequent one, we store
 613 # the name -> CGI key mapping here, instead of the reverse.
 614 #
 615 # XXX: Warning: If you touch this, check the search form for updating,
 616 # too.
 617
 618 our @cgi_param_mapping = (
 619         project => "p",
 620         action => "a",
 621         file_name => "f",
 622         file_parent => "fp",
 623         hash => "h",
 624         hash_parent => "hp",
 625         hash_base => "hb",
 626         hash_parent_base => "hpb",
 627         page => "pg",
 628         order => "o",
 629         searchtext => "s",
 630         searchtype => "st",
 631         snapshot_format => "sf",
 632         extra_options => "opt",
 633         search_use_regexp => "sr",
 634         # this must be last entry (for manipulation from JavaScript)
 635         javascript => "js"
 636 );
 637 our %cgi_param_mapping = @cgi_param_mapping;
 638
 639 # we will also need to know the possible actions, for validation
 640 our %actions = (
 641         "blame" => \&git_blame,
 642         "blame_incremental" => \&git_blame_incremental,
 643         "blame_data" => \&git_blame_data,
 644         "blobdiff" => \&git_blobdiff,
 645         "blobdiff_plain" => \&git_blobdiff_plain,
 646         "blob" => \&git_blob,
 647         "blob_plain" => \&git_blob_plain,
 648         "commitdiff" => \&git_commitdiff,
 649         "commitdiff_plain" => \&git_commitdiff_plain,
 650         "commit" => \&git_commit,
 651         "forks" => \&git_forks,
 652         "heads" => \&git_heads,
 653         "history" => \&git_history,
 654         "log" => \&git_log,
 655         "patch" => \&git_patch,
 656         "patches" => \&git_patches,
 657         "rss" => \&git_rss,
 658         "atom" => \&git_atom,
 659         "search" => \&git_search,
 660         "search_help" => \&git_search_help,
 661         "shortlog" => \&git_shortlog,
 662         "summary" => \&git_summary,
 663         "tag" => \&git_tag,
 664         "tags" => \&git_tags,
 665         "tree" => \&git_tree,
 666         "snapshot" => \&git_snapshot,
 667         "object" => \&git_object,
 668         # those below don't need $project
 669         "opml" => \&git_opml,
 670         "project_list" => \&git_project_list,
 671         "project_index" => \&git_project_index,
 672 );
 673
 674 # finally, we have the hash of allowed extra_options for the commands that
 675 # allow them
 676 our %allowed_options = (
 677         "--no-merges" => [ qw(rss atom log shortlog history) ],
 678 );
 679
 680 # fill %input_params with the CGI parameters. All values except for 'opt'
 681 # should be single values, but opt can be an array. We should probably
 682 # build an array of parameters that can be multi-valued, but since for the time
 683 # being it's only this one, we just single it out
 684 while (my ($name, $symbol) = each %cgi_param_mapping) {
 685         if ($symbol eq 'opt') {
 686                 $input_params{$name} = [ $cgi->param($symbol) ];
 687         } else {
 688                 $input_params{$name} = $cgi->param($symbol);
 689         }
 690 }
 691
 692 # now read PATH_INFO and update the parameter list for missing parameters
 693 sub evaluate_path_info {
 694         return if defined $input_params{'project'};
 695         return if !$path_info;
 696         $path_info =~ s,^/+,,;
 697         return if !$path_info;
 698
 699         # find which part of PATH_INFO is project
 700         my $project = $path_info;
 701         $project =~ s,/+$,,;
 702         while ($project && !check_head_link("$projectroot/$project")) {
 703                 $project =~ s,/*[^/]*$,,;
 704         }
 705         return unless $project;
 706         $input_params{'project'} = $project;
 707
 708         # do not change any parameters if an action is given using the query string
 709         return if $input_params{'action'};
 710         $path_info =~ s,^\Q$project\E/*,,;
 711
 712         # next, check if we have an action
 713         my $action = $path_info;
 714         $action =~ s,/.*$,,;
 715         if (exists $actions{$action}) {
 716                 $path_info =~ s,^$action/*,,;
 717                 $input_params{'action'} = $action;
 718         }
 719
 720         # list of actions that want hash_base instead of hash, but can have no
 721         # pathname (f) parameter
 722         my @wants_base = (
 723                 'tree',
 724                 'history',
 725         );
 726
 727         # we want to catch
 728         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 729         my ($parentrefname, $parentpathname, $refname, $pathname) =
 730                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 731
 732         # first, analyze the 'current' part
 733         if (defined $pathname) {
 734                 # we got "branch:filename" or "branch:dir/"
 735                 # we could use git_get_type(branch:pathname), but:
 736                 # - it needs $git_dir
 737                 # - it does a git() call
 738                 # - the convention of terminating directories with a slash
 739                 #   makes it superfluous
 740                 # - embedding the action in the PATH_INFO would make it even
 741                 #   more superfluous
 742                 $pathname =~ s,^/+,,;
 743                 if (!$pathname || substr($pathname, -1) eq "/") {
 744                         $input_params{'action'} ||= "tree";
 745                         $pathname =~ s,/$,,;
 746                 } else {
 747                         # the default action depends on whether we had parent info
 748                         # or not
 749                         if ($parentrefname) {
 750                                 $input_params{'action'} ||= "blobdiff_plain";
 751                         } else {
 752                                 $input_params{'action'} ||= "blob_plain";
 753                         }
 754                 }
 755                 $input_params{'hash_base'} ||= $refname;
 756                 $input_params{'file_name'} ||= $pathname;
 757         } elsif (defined $refname) {
 758                 # we got "branch". In this case we have to choose if we have to
 759                 # set hash or hash_base.
 760                 #
 761                 # Most of the actions without a pathname only want hash to be
 762                 # set, except for the ones specified in @wants_base that want
 763                 # hash_base instead. It should also be noted that hand-crafted
 764                 # links having 'history' as an action and no pathname or hash
 765                 # set will fail, but that happens regardless of PATH_INFO.
 766                 $input_params{'action'} ||= "shortlog";
 767                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 768                         $input_params{'hash_base'} ||= $refname;
 769                 } else {
 770                         $input_params{'hash'} ||= $refname;
 771                 }
 772         }
 773
 774         # next, handle the 'parent' part, if present
 775         if (defined $parentrefname) {
 776                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 777                 # someproject/blobdiff/oldrev..newrev:/filename
 778                 if ($parentpathname) {
 779                         $parentpathname =~ s,^/+,,;
 780                         $parentpathname =~ s,/$,,;
 781                         $input_params{'file_parent'} ||= $parentpathname;
 782                 } else {
 783                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 784                 }
 785                 # we assume that hash_parent_base is wanted if a path was specified,
 786                 # or if the action wants hash_base instead of hash
 787                 if (defined $input_params{'file_parent'} ||
 788                         grep { $_ eq $input_params{'action'} } @wants_base) {
 789                         $input_params{'hash_parent_base'} ||= $parentrefname;
 790                 } else {
 791                         $input_params{'hash_parent'} ||= $parentrefname;
 792                 }
 793         }
 794
 795         # for the snapshot action, we allow URLs in the form
 796         # $project/snapshot/$hash.ext
 797         # where .ext determines the snapshot and gets removed from the
 798         # passed $refname to provide the $hash.
 799         #
 800         # To be able to tell that $refname includes the format extension, we
 801         # require the following two conditions to be satisfied:
 802         # - the hash input parameter MUST have been set from the $refname part
 803         #   of the URL (i.e. they must be equal)
 804         # - the snapshot format MUST NOT have been defined already (e.g. from
 805         #   CGI parameter sf)
 806         # It's also useless to try any matching unless $refname has a dot,
 807         # so we check for that too
 808         if (defined $input_params{'action'} &&
 809                 $input_params{'action'} eq 'snapshot' &&
 810                 defined $refname && index($refname, '.') != -1 &&
 811                 $refname eq $input_params{'hash'} &&
 812                 !defined $input_params{'snapshot_format'}) {
 813                 # We loop over the known snapshot formats, checking for
 814                 # extensions. Allowed extensions are both the defined suffix
 815                 # (which includes the initial dot already) and the snapshot
 816                 # format key itself, with a prepended dot
 817                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 818                         my $hash = $refname;
 819                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 820                                 next;
 821                         }
 822                         my $sfx = $1;
 823                         # a valid suffix was found, so set the snapshot format
 824                         # and reset the hash parameter
 825                         $input_params{'snapshot_format'} = $fmt;
 826                         $input_params{'hash'} = $hash;
 827                         # we also set the format suffix to the one requested
 828                         # in the URL: this way a request for e.g. .tgz returns
 829                         # a .tgz instead of a .tar.gz
 830                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 831                         last;
 832                 }
 833         }
 834 }
 835 evaluate_path_info();
 836
 837 our $action = $input_params{'action'};
 838 if (defined $action) {
 839         if (!validate_action($action)) {
 840                 die_error(400, "Invalid action parameter");
 841         }
 842 }
 843
 844 # parameters which are pathnames
 845 our $project = $input_params{'project'};
 846 if (defined $project) {
 847         if (!validate_project($project)) {
 848                 undef $project;
 849                 die_error(404, "No such project");
 850         }
 851 }
 852
 853 our $file_name = $input_params{'file_name'};
 854 if (defined $file_name) {
 855         if (!validate_pathname($file_name)) {
 856                 die_error(400, "Invalid file parameter");
 857         }
 858 }
 859
 860 our $file_parent = $input_params{'file_parent'};
 861 if (defined $file_parent) {
 862         if (!validate_pathname($file_parent)) {
 863                 die_error(400, "Invalid file parent parameter");
 864         }
 865 }
 866
 867 # parameters which are refnames
 868 our $hash = $input_params{'hash'};
 869 if (defined $hash) {
 870         if (!validate_refname($hash)) {
 871                 die_error(400, "Invalid hash parameter");
 872         }
 873 }
 874
 875 our $hash_parent = $input_params{'hash_parent'};
 876 if (defined $hash_parent) {
 877         if (!validate_refname($hash_parent)) {
 878                 die_error(400, "Invalid hash parent parameter");
 879         }
 880 }
 881
 882 our $hash_base = $input_params{'hash_base'};
 883 if (defined $hash_base) {
 884         if (!validate_refname($hash_base)) {
 885                 die_error(400, "Invalid hash base parameter");
 886         }
 887 }
 888
 889 our @extra_options = @{$input_params{'extra_options'}};
 890 # @extra_options is always defined, since it can only be (currently) set from
 891 # CGI, and $cgi->param() returns the empty array in array context if the param
 892 # is not set
 893 foreach my $opt (@extra_options) {
 894         if (not exists $allowed_options{$opt}) {
 895                 die_error(400, "Invalid option parameter");
 896         }
 897         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 898                 die_error(400, "Invalid option parameter for this action");
 899         }
 900 }
 901
 902 our $hash_parent_base = $input_params{'hash_parent_base'};
 903 if (defined $hash_parent_base) {
 904         if (!validate_refname($hash_parent_base)) {
 905                 die_error(400, "Invalid hash parent base parameter");
 906         }
 907 }
 908
 909 # other parameters
 910 our $page = $input_params{'page'};
 911 if (defined $page) {
 912         if ($page =~ m/[^0-9]/) {
 913                 die_error(400, "Invalid page parameter");
 914         }
 915 }
 916
 917 our $searchtype = $input_params{'searchtype'};
 918 if (defined $searchtype) {
 919         if ($searchtype =~ m/[^a-z]/) {
 920                 die_error(400, "Invalid searchtype parameter");
 921         }
 922 }
 923
 924 our $search_use_regexp = $input_params{'search_use_regexp'};
 925
 926 our $searchtext = $input_params{'searchtext'};
 927 our $search_regexp;
 928 if (defined $searchtext) {
 929         if (length($searchtext) < 2) {
 930                 die_error(403, "At least two characters are required for search parameter");
 931         }
 932         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 933 }
 934
 935 # path to the current git repository
 936 our $git_dir;
 937 $git_dir = "$projectroot/$project" if $project;
 938
 939 # list of supported snapshot formats
 940 our @snapshot_fmts = gitweb_get_feature('snapshot');
 941 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 942
 943 # check that the avatar feature is set to a known provider name,
 944 # and for each provider check if the dependencies are satisfied.
 945 # if the provider name is invalid or the dependencies are not met,
 946 # reset $git_avatar to the empty string.
 947 our ($git_avatar) = gitweb_get_feature('avatar');
 948 if ($git_avatar eq 'gravatar') {
 949         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 950 } elsif ($git_avatar eq 'picon') {
 951         # no dependencies
 952 } else {
 953         $git_avatar = '';
 954 }
 955
 956 # custom error handler: 'die <message>' is Internal Server Error
 957 sub handle_errors_html {
 958         my $msg = shift; # it is already HTML escaped
 959
 960         # to avoid infinite loop where error occurs in die_error,
 961         # change handler to default handler, disabling handle_errors_html
 962         set_message("Error occured when inside die_error:\n$msg");
 963
 964         # you cannot jump out of die_error when called as error handler;
 965         # the subroutine set via CGI::Carp::set_message is called _after_
 966         # HTTP headers are already written, so it cannot write them itself
 967         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
 968 }
 969 set_message(\&handle_errors_html);
 970
 971 # dispatch
 972 if (!defined $action) {
 973         if (defined $hash) {
 974                 $action = git_get_type($hash);
 975         } elsif (defined $hash_base && defined $file_name) {
 976                 $action = git_get_type("$hash_base:$file_name");
 977         } elsif (defined $project) {
 978                 $action = 'summary';
 979         } else {
 980                 $action = 'project_list';
 981         }
 982 }
 983 if (!defined($actions{$action})) {
 984         die_error(400, "Unknown action");
 985 }
 986 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 987     !$project) {
 988         die_error(400, "Project needed");
 989 }
 990 $actions{$action}->();
 991 DONE_GITWEB:
 992 1;
 993
 994 ## ======================================================================
 995 ## action links
 996
 997 # possible values of extra options
 998 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
 999 # -replay => 1      - start from a current view (replay with modifications)
1000 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1001 sub href {
1002         my %params = @_;
1003         # default is to use -absolute url() i.e. $my_uri
1004         my $href = $params{-full} ? $my_url : $my_uri;
1005
1006         $params{'project'} = $project unless exists $params{'project'};
1007
1008         if ($params{-replay}) {
1009                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1010                         if (!exists $params{$name}) {
1011                                 $params{$name} = $input_params{$name};
1012                         }
1013                 }
1014         }
1015
1016         my $use_pathinfo = gitweb_check_feature('pathinfo');
1017         if (defined $params{'project'} &&
1018             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1019                 # try to put as many parameters as possible in PATH_INFO:
1020                 #   - project name
1021                 #   - action
1022                 #   - hash_parent or hash_parent_base:/file_parent
1023                 #   - hash or hash_base:/filename
1024                 #   - the snapshot_format as an appropriate suffix
1025
1026                 # When the script is the root DirectoryIndex for the domain,
1027                 # $href here would be something like http://gitweb.example.com/
1028                 # Thus, we strip any trailing / from $href, to spare us double
1029                 # slashes in the final URL
1030                 $href =~ s,/$,,;
1031
1032                 # Then add the project name, if present
1033                 $href .= "/".esc_url($params{'project'});
1034                 delete $params{'project'};
1035
1036                 # since we destructively absorb parameters, we keep this
1037                 # boolean that remembers if we're handling a snapshot
1038                 my $is_snapshot = $params{'action'} eq 'snapshot';
1039
1040                 # Summary just uses the project path URL, any other action is
1041                 # added to the URL
1042                 if (defined $params{'action'}) {
1043                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1044                         delete $params{'action'};
1045                 }
1046
1047                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1048                 # stripping nonexistent or useless pieces
1049                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1050                         || $params{'hash_parent'} || $params{'hash'});
1051                 if (defined $params{'hash_base'}) {
1052                         if (defined $params{'hash_parent_base'}) {
1053                                 $href .= esc_url($params{'hash_parent_base'});
1054                                 # skip the file_parent if it's the same as the file_name
1055                                 if (defined $params{'file_parent'}) {
1056                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1057                                                 delete $params{'file_parent'};
1058                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1059                                                 $href .= ":/".esc_url($params{'file_parent'});
1060                                                 delete $params{'file_parent'};
1061                                         }
1062                                 }
1063                                 $href .= "..";
1064                                 delete $params{'hash_parent'};
1065                                 delete $params{'hash_parent_base'};
1066                         } elsif (defined $params{'hash_parent'}) {
1067                                 $href .= esc_url($params{'hash_parent'}). "..";
1068                                 delete $params{'hash_parent'};
1069                         }
1070
1071                         $href .= esc_url($params{'hash_base'});
1072                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1073                                 $href .= ":/".esc_url($params{'file_name'});
1074                                 delete $params{'file_name'};
1075                         }
1076                         delete $params{'hash'};
1077                         delete $params{'hash_base'};
1078                 } elsif (defined $params{'hash'}) {
1079                         $href .= esc_url($params{'hash'});
1080                         delete $params{'hash'};
1081                 }
1082
1083                 # If the action was a snapshot, we can absorb the
1084                 # snapshot_format parameter too
1085                 if ($is_snapshot) {
1086                         my $fmt = $params{'snapshot_format'};
1087                         # snapshot_format should always be defined when href()
1088                         # is called, but just in case some code forgets, we
1089                         # fall back to the default
1090                         $fmt ||= $snapshot_fmts[0];
1091                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1092                         delete $params{'snapshot_format'};
1093                 }
1094         }
1095
1096         # now encode the parameters explicitly
1097         my @result = ();
1098         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1099                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1100                 if (defined $params{$name}) {
1101                         if (ref($params{$name}) eq "ARRAY") {
1102                                 foreach my $par (@{$params{$name}}) {
1103                                         push @result, $symbol . "=" . esc_param($par);
1104                                 }
1105                         } else {
1106                                 push @result, $symbol . "=" . esc_param($params{$name});
1107                         }
1108                 }
1109         }
1110         $href .= "?" . join(';', @result) if scalar @result;
1111
1112         return $href;
1113 }
1114
1115
1116 ## ======================================================================
1117 ## validation, quoting/unquoting and escaping
1118
1119 sub validate_action {
1120         my $input = shift || return undef;
1121         return undef unless exists $actions{$input};
1122         return $input;
1123 }
1124
1125 sub validate_project {
1126         my $input = shift || return undef;
1127         if (!validate_pathname($input) ||
1128                 !(-d "$projectroot/$input") ||
1129                 !check_export_ok("$projectroot/$input") ||
1130                 ($strict_export && !project_in_list($input))) {
1131                 return undef;
1132         } else {
1133                 return $input;
1134         }
1135 }
1136
1137 sub validate_pathname {
1138         my $input = shift || return undef;
1139
1140         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1141         # at the beginning, at the end, and between slashes.
1142         # also this catches doubled slashes
1143         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1144                 return undef;
1145         }
1146         # no null characters
1147         if ($input =~ m!\0!) {
1148                 return undef;
1149         }
1150         return $input;
1151 }
1152
1153 sub validate_refname {
1154         my $input = shift || return undef;
1155
1156         # textual hashes are O.K.
1157         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1158                 return $input;
1159         }
1160         # it must be correct pathname
1161         $input = validate_pathname($input)
1162                 or return undef;
1163         # restrictions on ref name according to git-check-ref-format
1164         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1165                 return undef;
1166         }
1167         return $input;
1168 }
1169
1170 # decode sequences of octets in utf8 into Perl's internal form,
1171 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1172 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1173 sub to_utf8 {
1174         my $str = shift;
1175         return undef unless defined $str;
1176         if (utf8::valid($str)) {
1177                 utf8::decode($str);
1178                 return $str;
1179         } else {
1180                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1181         }
1182 }
1183
1184 # quote unsafe chars, but keep the slash, even when it's not
1185 # correct, but quoted slashes look too horrible in bookmarks
1186 sub esc_param {
1187         my $str = shift;
1188         return undef unless defined $str;
1189         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1190         $str =~ s/ /\+/g;
1191         return $str;
1192 }
1193
1194 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1195 sub esc_url {
1196         my $str = shift;
1197         return undef unless defined $str;
1198         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1199         $str =~ s/\+/%2B/g;
1200         $str =~ s/ /\+/g;
1201         return $str;
1202 }
1203
1204 # replace invalid utf8 character with SUBSTITUTION sequence
1205 sub esc_html {
1206         my $str = shift;
1207         my %opts = @_;
1208
1209         return undef unless defined $str;
1210
1211         $str = to_utf8($str);
1212         $str = $cgi->escapeHTML($str);
1213         if ($opts{'-nbsp'}) {
1214                 $str =~ s/ /&nbsp;/g;
1215         }
1216         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1217         return $str;
1218 }
1219
1220 # quote control characters and escape filename to HTML
1221 sub esc_path {
1222         my $str = shift;
1223         my %opts = @_;
1224
1225         return undef unless defined $str;
1226
1227         $str = to_utf8($str);
1228         $str = $cgi->escapeHTML($str);
1229         if ($opts{'-nbsp'}) {
1230                 $str =~ s/ /&nbsp;/g;
1231         }
1232         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1233         return $str;
1234 }
1235
1236 # Make control characters "printable", using character escape codes (CEC)
1237 sub quot_cec {
1238         my $cntrl = shift;
1239         my %opts = @_;
1240         my %es = ( # character escape codes, aka escape sequences
1241                 "\t" => '\t',   # tab            (HT)
1242                 "\n" => '\n',   # line feed      (LF)
1243                 "\r" => '\r',   # carrige return (CR)
1244                 "\f" => '\f',   # form feed      (FF)
1245                 "\b" => '\b',   # backspace      (BS)
1246                 "\a" => '\a',   # alarm (bell)   (BEL)
1247                 "\e" => '\e',   # escape         (ESC)
1248                 "\013" => '\v', # vertical tab   (VT)
1249                 "\000" => '\0', # nul character  (NUL)
1250         );
1251         my $chr = ( (exists $es{$cntrl})
1252                     ? $es{$cntrl}
1253                     : sprintf('\%2x', ord($cntrl)) );
1254         if ($opts{-nohtml}) {
1255                 return $chr;
1256         } else {
1257                 return "<span class=\"cntrl\">$chr</span>";
1258         }
1259 }
1260
1261 # Alternatively use unicode control pictures codepoints,
1262 # Unicode "printable representation" (PR)
1263 sub quot_upr {
1264         my $cntrl = shift;
1265         my %opts = @_;
1266
1267         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1268         if ($opts{-nohtml}) {
1269                 return $chr;
1270         } else {
1271                 return "<span class=\"cntrl\">$chr</span>";
1272         }
1273 }
1274
1275 # git may return quoted and escaped filenames
1276 sub unquote {
1277         my $str = shift;
1278
1279         sub unq {
1280                 my $seq = shift;
1281                 my %es = ( # character escape codes, aka escape sequences
1282                         't' => "\t",   # tab            (HT, TAB)
1283                         'n' => "\n",   # newline        (NL)
1284                         'r' => "\r",   # return         (CR)
1285                         'f' => "\f",   # form feed      (FF)
1286                         'b' => "\b",   # backspace      (BS)
1287                         'a' => "\a",   # alarm (bell)   (BEL)
1288                         'e' => "\e",   # escape         (ESC)
1289                         'v' => "\013", # vertical tab   (VT)
1290                 );
1291
1292                 if ($seq =~ m/^[0-7]{1,3}$/) {
1293                         # octal char sequence
1294                         return chr(oct($seq));
1295                 } elsif (exists $es{$seq}) {
1296                         # C escape sequence, aka character escape code
1297                         return $es{$seq};
1298                 }
1299                 # quoted ordinary character
1300                 return $seq;
1301         }
1302
1303         if ($str =~ m/^"(.*)"$/) {
1304                 # needs unquoting
1305                 $str = $1;
1306                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1307         }
1308         return $str;
1309 }
1310
1311 # escape tabs (convert tabs to spaces)
1312 sub untabify {
1313         my $line = shift;
1314
1315         while ((my $pos = index($line, "\t")) != -1) {
1316                 if (my $count = (8 - ($pos % 8))) {
1317                         my $spaces = ' ' x $count;
1318                         $line =~ s/\t/$spaces/;
1319                 }
1320         }
1321
1322         return $line;
1323 }
1324
1325 sub project_in_list {
1326         my $project = shift;
1327         my @list = git_get_projects_list();
1328         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1329 }
1330
1331 ## ----------------------------------------------------------------------
1332 ## HTML aware string manipulation
1333
1334 # Try to chop given string on a word boundary between position
1335 # $len and $len+$add_len. If there is no word boundary there,
1336 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1337 # (marking chopped part) would be longer than given string.
1338 sub chop_str {
1339         my $str = shift;
1340         my $len = shift;
1341         my $add_len = shift || 10;
1342         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1343
1344         # Make sure perl knows it is utf8 encoded so we don't
1345         # cut in the middle of a utf8 multibyte char.
1346         $str = to_utf8($str);
1347
1348         # allow only $len chars, but don't cut a word if it would fit in $add_len
1349         # if it doesn't fit, cut it if it's still longer than the dots we would add
1350         # remove chopped character entities entirely
1351
1352         # when chopping in the middle, distribute $len into left and right part
1353         # return early if chopping wouldn't make string shorter
1354         if ($where eq 'center') {
1355                 return $str if ($len + 5 >= length($str)); # filler is length 5
1356                 $len = int($len/2);
1357         } else {
1358                 return $str if ($len + 4 >= length($str)); # filler is length 4
1359         }
1360
1361         # regexps: ending and beginning with word part up to $add_len
1362         my $endre = qr/.{$len}\w{0,$add_len}/;
1363         my $begre = qr/\w{0,$add_len}.{$len}/;
1364
1365         if ($where eq 'left') {
1366                 $str =~ m/^(.*?)($begre)$/;
1367                 my ($lead, $body) = ($1, $2);
1368                 if (length($lead) > 4) {
1369                         $lead = " ...";
1370                 }
1371                 return "$lead$body";
1372
1373         } elsif ($where eq 'center') {
1374                 $str =~ m/^($endre)(.*)$/;
1375                 my ($left, $str)  = ($1, $2);
1376                 $str =~ m/^(.*?)($begre)$/;
1377                 my ($mid, $right) = ($1, $2);
1378                 if (length($mid) > 5) {
1379                         $mid = " ... ";
1380                 }
1381                 return "$left$mid$right";
1382
1383         } else {
1384                 $str =~ m/^($endre)(.*)$/;
1385                 my $body = $1;
1386                 my $tail = $2;
1387                 if (length($tail) > 4) {
1388                         $tail = "... ";
1389                 }
1390                 return "$body$tail";
1391         }
1392 }
1393
1394 # takes the same arguments as chop_str, but also wraps a <span> around the
1395 # result with a title attribute if it does get chopped. Additionally, the
1396 # string is HTML-escaped.
1397 sub chop_and_escape_str {
1398         my ($str) = @_;
1399
1400         my $chopped = chop_str(@_);
1401         if ($chopped eq $str) {
1402                 return esc_html($chopped);
1403         } else {
1404                 $str =~ s/[[:cntrl:]]/?/g;
1405                 return $cgi->span({-title=>$str}, esc_html($chopped));
1406         }
1407 }
1408
1409 ## ----------------------------------------------------------------------
1410 ## functions returning short strings
1411
1412 # CSS class for given age value (in seconds)
1413 sub age_class {
1414         my $age = shift;
1415
1416         if (!defined $age) {
1417                 return "noage";
1418         } elsif ($age < 60*60*2) {
1419                 return "age0";
1420         } elsif ($age < 60*60*24*2) {
1421                 return "age1";
1422         } else {
1423                 return "age2";
1424         }
1425 }
1426
1427 # convert age in seconds to "nn units ago" string
1428 sub age_string {
1429         my $age = shift;
1430         my $age_str;
1431
1432         if ($age > 60*60*24*365*2) {
1433                 $age_str = (int $age/60/60/24/365);
1434                 $age_str .= " years ago";
1435         } elsif ($age > 60*60*24*(365/12)*2) {
1436                 $age_str = int $age/60/60/24/(365/12);
1437                 $age_str .= " months ago";
1438         } elsif ($age > 60*60*24*7*2) {
1439                 $age_str = int $age/60/60/24/7;
1440                 $age_str .= " weeks ago";
1441         } elsif ($age > 60*60*24*2) {
1442                 $age_str = int $age/60/60/24;
1443                 $age_str .= " days ago";
1444         } elsif ($age > 60*60*2) {
1445                 $age_str = int $age/60/60;
1446                 $age_str .= " hours ago";
1447         } elsif ($age > 60*2) {
1448                 $age_str = int $age/60;
1449                 $age_str .= " min ago";
1450         } elsif ($age > 2) {
1451                 $age_str = int $age;
1452                 $age_str .= " sec ago";
1453         } else {
1454                 $age_str .= " right now";
1455         }
1456         return $age_str;
1457 }
1458
1459 use constant {
1460         S_IFINVALID => 0030000,
1461         S_IFGITLINK => 0160000,
1462 };
1463
1464 # submodule/subproject, a commit object reference
1465 sub S_ISGITLINK {
1466         my $mode = shift;
1467
1468         return (($mode & S_IFMT) == S_IFGITLINK)
1469 }
1470
1471 # convert file mode in octal to symbolic file mode string
1472 sub mode_str {
1473         my $mode = oct shift;
1474
1475         if (S_ISGITLINK($mode)) {
1476                 return 'm---------';
1477         } elsif (S_ISDIR($mode & S_IFMT)) {
1478                 return 'drwxr-xr-x';
1479         } elsif (S_ISLNK($mode)) {
1480                 return 'lrwxrwxrwx';
1481         } elsif (S_ISREG($mode)) {
1482                 # git cares only about the executable bit
1483                 if ($mode & S_IXUSR) {
1484                         return '-rwxr-xr-x';
1485                 } else {
1486                         return '-rw-r--r--';
1487                 };
1488         } else {
1489                 return '----------';
1490         }
1491 }
1492
1493 # convert file mode in octal to file type string
1494 sub file_type {
1495         my $mode = shift;
1496
1497         if ($mode !~ m/^[0-7]+$/) {
1498                 return $mode;
1499         } else {
1500                 $mode = oct $mode;
1501         }
1502
1503         if (S_ISGITLINK($mode)) {
1504                 return "submodule";
1505         } elsif (S_ISDIR($mode & S_IFMT)) {
1506                 return "directory";
1507         } elsif (S_ISLNK($mode)) {
1508                 return "symlink";
1509         } elsif (S_ISREG($mode)) {
1510                 return "file";
1511         } else {
1512                 return "unknown";
1513         }
1514 }
1515
1516 # convert file mode in octal to file type description string
1517 sub file_type_long {
1518         my $mode = shift;
1519
1520         if ($mode !~ m/^[0-7]+$/) {
1521                 return $mode;
1522         } else {
1523                 $mode = oct $mode;
1524         }
1525
1526         if (S_ISGITLINK($mode)) {
1527                 return "submodule";
1528         } elsif (S_ISDIR($mode & S_IFMT)) {
1529                 return "directory";
1530         } elsif (S_ISLNK($mode)) {
1531                 return "symlink";
1532         } elsif (S_ISREG($mode)) {
1533                 if ($mode & S_IXUSR) {
1534                         return "executable";
1535                 } else {
1536                         return "file";
1537                 };
1538         } else {
1539                 return "unknown";
1540         }
1541 }
1542
1543
1544 ## ----------------------------------------------------------------------
1545 ## functions returning short HTML fragments, or transforming HTML fragments
1546 ## which don't belong to other sections
1547
1548 # format line of commit message.
1549 sub format_log_line_html {
1550         my $line = shift;
1551
1552         $line = esc_html($line, -nbsp=>1);
1553         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1554                 $cgi->a({-href => href(action=>"object", hash=>$1),
1555                                         -class => "text"}, $1);
1556         }eg;
1557
1558         return $line;
1559 }
1560
1561 # format marker of refs pointing to given object
1562
1563 # the destination action is chosen based on object type and current context:
1564 # - for annotated tags, we choose the tag view unless it's the current view
1565 #   already, in which case we go to shortlog view
1566 # - for other refs, we keep the current view if we're in history, shortlog or
1567 #   log view, and select shortlog otherwise
1568 sub format_ref_marker {
1569         my ($refs, $id) = @_;
1570         my $markers = '';
1571
1572         if (defined $refs->{$id}) {
1573                 foreach my $ref (@{$refs->{$id}}) {
1574                         # this code exploits the fact that non-lightweight tags are the
1575                         # only indirect objects, and that they are the only objects for which
1576                         # we want to use tag instead of shortlog as action
1577                         my ($type, $name) = qw();
1578                         my $indirect = ($ref =~ s/\^\{\}$//);
1579                         # e.g. tags/v2.6.11 or heads/next
1580                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1581                                 $type = $1;
1582                                 $name = $2;
1583                         } else {
1584                                 $type = "ref";
1585                                 $name = $ref;
1586                         }
1587
1588                         my $class = $type;
1589                         $class .= " indirect" if $indirect;
1590
1591                         my $dest_action = "shortlog";
1592
1593                         if ($indirect) {
1594                                 $dest_action = "tag" unless $action eq "tag";
1595                         } elsif ($action =~ /^(history|(short)?log)$/) {
1596                                 $dest_action = $action;
1597                         }
1598
1599                         my $dest = "";
1600                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1601                         $dest .= $ref;
1602
1603                         my $link = $cgi->a({
1604                                 -href => href(
1605                                         action=>$dest_action,
1606                                         hash=>$dest
1607                                 )}, $name);
1608
1609                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1610                                 $link . "</span>";
1611                 }
1612         }
1613
1614         if ($markers) {
1615                 return ' <span class="refs">'. $markers . '</span>';
1616         } else {
1617                 return "";
1618         }
1619 }
1620
1621 # format, perhaps shortened and with markers, title line
1622 sub format_subject_html {
1623         my ($long, $short, $href, $extra) = @_;
1624         $extra = '' unless defined($extra);
1625
1626         if (length($short) < length($long)) {
1627                 $long =~ s/[[:cntrl:]]/?/g;
1628                 return $cgi->a({-href => $href, -class => "list subject",
1629                                 -title => to_utf8($long)},
1630                        esc_html($short)) . $extra;
1631         } else {
1632                 return $cgi->a({-href => $href, -class => "list subject"},
1633                        esc_html($long)) . $extra;
1634         }
1635 }
1636
1637 # Rather than recomputing the url for an email multiple times, we cache it
1638 # after the first hit. This gives a visible benefit in views where the avatar
1639 # for the same email is used repeatedly (e.g. shortlog).
1640 # The cache is shared by all avatar engines (currently gravatar only), which
1641 # are free to use it as preferred. Since only one avatar engine is used for any
1642 # given page, there's no risk for cache conflicts.
1643 our %avatar_cache = ();
1644
1645 # Compute the picon url for a given email, by using the picon search service over at
1646 # http://www.cs.indiana.edu/picons/search.html
1647 sub picon_url {
1648         my $email = lc shift;
1649         if (!$avatar_cache{$email}) {
1650                 my ($user, $domain) = split('@', $email);
1651                 $avatar_cache{$email} =
1652                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1653                         "$domain/$user/" .
1654                         "users+domains+unknown/up/single";
1655         }
1656         return $avatar_cache{$email};
1657 }
1658
1659 # Compute the gravatar url for a given email, if it's not in the cache already.
1660 # Gravatar stores only the part of the URL before the size, since that's the
1661 # one computationally more expensive. This also allows reuse of the cache for
1662 # different sizes (for this particular engine).
1663 sub gravatar_url {
1664         my $email = lc shift;
1665         my $size = shift;
1666         $avatar_cache{$email} ||=
1667                 "http://www.gravatar.com/avatar/" .
1668                         Digest::MD5::md5_hex($email) . "?s=";
1669         return $avatar_cache{$email} . $size;
1670 }
1671
1672 # Insert an avatar for the given $email at the given $size if the feature
1673 # is enabled.
1674 sub git_get_avatar {
1675         my ($email, %opts) = @_;
1676         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1677         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1678         $opts{-size} ||= 'default';
1679         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1680         my $url = "";
1681         if ($git_avatar eq 'gravatar') {
1682                 $url = gravatar_url($email, $size);
1683         } elsif ($git_avatar eq 'picon') {
1684                 $url = picon_url($email);
1685         }
1686         # Other providers can be added by extending the if chain, defining $url
1687         # as needed. If no variant puts something in $url, we assume avatars
1688         # are completely disabled/unavailable.
1689         if ($url) {
1690                 return $pre_white .
1691                        "<img width=\"$size\" " .
1692                             "class=\"avatar\" " .
1693                             "src=\"$url\" " .
1694                             "alt=\"\" " .
1695                        "/>" . $post_white;
1696         } else {
1697                 return "";
1698         }
1699 }
1700
1701 sub format_search_author {
1702         my ($author, $searchtype, $displaytext) = @_;
1703         my $have_search = gitweb_check_feature('search');
1704
1705         if ($have_search) {
1706                 my $performed = "";
1707                 if ($searchtype eq 'author') {
1708                         $performed = "authored";
1709                 } elsif ($searchtype eq 'committer') {
1710                         $performed = "committed";
1711                 }
1712
1713                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1714                                 searchtext=>$author,
1715                                 searchtype=>$searchtype), class=>"list",
1716                                 title=>"Search for commits $performed by $author"},
1717                                 $displaytext);
1718
1719         } else {
1720                 return $displaytext;
1721         }
1722 }
1723
1724 # format the author name of the given commit with the given tag
1725 # the author name is chopped and escaped according to the other
1726 # optional parameters (see chop_str).
1727 sub format_author_html {
1728         my $tag = shift;
1729         my $co = shift;
1730         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1731         return "<$tag class=\"author\">" .
1732                format_search_author($co->{'author_name'}, "author",
1733                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1734                        $author) .
1735                "</$tag>";
1736 }
1737
1738 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1739 sub format_git_diff_header_line {
1740         my $line = shift;
1741         my $diffinfo = shift;
1742         my ($from, $to) = @_;
1743
1744         if ($diffinfo->{'nparents'}) {
1745                 # combined diff
1746                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1747                 if ($to->{'href'}) {
1748                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1749                                          esc_path($to->{'file'}));
1750                 } else { # file was deleted (no href)
1751                         $line .= esc_path($to->{'file'});
1752                 }
1753         } else {
1754                 # "ordinary" diff
1755                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1756                 if ($from->{'href'}) {
1757                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1758                                          'a/' . esc_path($from->{'file'}));
1759                 } else { # file was added (no href)
1760                         $line .= 'a/' . esc_path($from->{'file'});
1761                 }
1762                 $line .= ' ';
1763                 if ($to->{'href'}) {
1764                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1765                                          'b/' . esc_path($to->{'file'}));
1766                 } else { # file was deleted
1767                         $line .= 'b/' . esc_path($to->{'file'});
1768                 }
1769         }
1770
1771         return "<div class=\"diff header\">$line</div>\n";
1772 }
1773
1774 # format extended diff header line, before patch itself
1775 sub format_extended_diff_header_line {
1776         my $line = shift;
1777         my $diffinfo = shift;
1778         my ($from, $to) = @_;
1779
1780         # match <path>
1781         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1782                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1783                                        esc_path($from->{'file'}));
1784         }
1785         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1786                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1787                                  esc_path($to->{'file'}));
1788         }
1789         # match single <mode>
1790         if ($line =~ m/\s(\d{6})$/) {
1791                 $line .= '<span class="info"> (' .
1792                          file_type_long($1) .
1793                          ')</span>';
1794         }
1795         # match <hash>
1796         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1797                 # can match only for combined diff
1798                 $line = 'index ';
1799                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1800                         if ($from->{'href'}[$i]) {
1801                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1802                                                   -class=>"hash"},
1803                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1804                         } else {
1805                                 $line .= '0' x 7;
1806                         }
1807                         # separator
1808                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1809                 }
1810                 $line .= '..';
1811                 if ($to->{'href'}) {
1812                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1813                                          substr($diffinfo->{'to_id'},0,7));
1814                 } else {
1815                         $line .= '0' x 7;
1816                 }
1817
1818         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1819                 # can match only for ordinary diff
1820                 my ($from_link, $to_link);
1821                 if ($from->{'href'}) {
1822                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1823                                              substr($diffinfo->{'from_id'},0,7));
1824                 } else {
1825                         $from_link = '0' x 7;
1826                 }
1827                 if ($to->{'href'}) {
1828                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1829                                            substr($diffinfo->{'to_id'},0,7));
1830                 } else {
1831                         $to_link = '0' x 7;
1832                 }
1833                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1834                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1835         }
1836
1837         return $line . "<br/>\n";
1838 }
1839
1840 # format from-file/to-file diff header
1841 sub format_diff_from_to_header {
1842         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1843         my $line;
1844         my $result = '';
1845
1846         $line = $from_line;
1847         #assert($line =~ m/^---/) if DEBUG;
1848         # no extra formatting for "^--- /dev/null"
1849         if (! $diffinfo->{'nparents'}) {
1850                 # ordinary (single parent) diff
1851                 if ($line =~ m!^--- "?a/!) {
1852                         if ($from->{'href'}) {
1853                                 $line = '--- a/' .
1854                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1855                                                 esc_path($from->{'file'}));
1856                         } else {
1857                                 $line = '--- a/' .
1858                                         esc_path($from->{'file'});
1859                         }
1860                 }
1861                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1862
1863         } else {
1864                 # combined diff (merge commit)
1865                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1866                         if ($from->{'href'}[$i]) {
1867                                 $line = '--- ' .
1868                                         $cgi->a({-href=>href(action=>"blobdiff",
1869                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1870                                                              hash_parent_base=>$parents[$i],
1871                                                              file_parent=>$from->{'file'}[$i],
1872                                                              hash=>$diffinfo->{'to_id'},
1873                                                              hash_base=>$hash,
1874                                                              file_name=>$to->{'file'}),
1875                                                  -class=>"path",
1876                                                  -title=>"diff" . ($i+1)},
1877                                                 $i+1) .
1878                                         '/' .
1879                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1880                                                 esc_path($from->{'file'}[$i]));
1881                         } else {
1882                                 $line = '--- /dev/null';
1883                         }
1884                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1885                 }
1886         }
1887
1888         $line = $to_line;
1889         #assert($line =~ m/^\+\+\+/) if DEBUG;
1890         # no extra formatting for "^+++ /dev/null"
1891         if ($line =~ m!^\+\+\+ "?b/!) {
1892                 if ($to->{'href'}) {
1893                         $line = '+++ b/' .
1894                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1895                                         esc_path($to->{'file'}));
1896                 } else {
1897                         $line = '+++ b/' .
1898                                 esc_path($to->{'file'});
1899                 }
1900         }
1901         $result .= qq!<div class="diff to_file">$line</div>\n!;
1902
1903         return $result;
1904 }
1905
1906 # create note for patch simplified by combined diff
1907 sub format_diff_cc_simplified {
1908         my ($diffinfo, @parents) = @_;
1909         my $result = '';
1910
1911         $result .= "<div class=\"diff header\">" .
1912                    "diff --cc ";
1913         if (!is_deleted($diffinfo)) {
1914                 $result .= $cgi->a({-href => href(action=>"blob",
1915                                                   hash_base=>$hash,
1916                                                   hash=>$diffinfo->{'to_id'},
1917                                                   file_name=>$diffinfo->{'to_file'}),
1918                                     -class => "path"},
1919                                    esc_path($diffinfo->{'to_file'}));
1920         } else {
1921                 $result .= esc_path($diffinfo->{'to_file'});
1922         }
1923         $result .= "</div>\n" . # class="diff header"
1924                    "<div class=\"diff nodifferences\">" .
1925                    "Simple merge" .
1926                    "</div>\n"; # class="diff nodifferences"
1927
1928         return $result;
1929 }
1930
1931 # format patch (diff) line (not to be used for diff headers)
1932 sub format_diff_line {
1933         my $line = shift;
1934         my ($from, $to) = @_;
1935         my $diff_class = "";
1936
1937         chomp $line;
1938
1939         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1940                 # combined diff
1941                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1942                 if ($line =~ m/^\@{3}/) {
1943                         $diff_class = " chunk_header";
1944                 } elsif ($line =~ m/^\\/) {
1945                         $diff_class = " incomplete";
1946                 } elsif ($prefix =~ tr/+/+/) {
1947                         $diff_class = " add";
1948                 } elsif ($prefix =~ tr/-/-/) {
1949                         $diff_class = " rem";
1950                 }
1951         } else {
1952                 # assume ordinary diff
1953                 my $char = substr($line, 0, 1);
1954                 if ($char eq '+') {
1955                         $diff_class = " add";
1956                 } elsif ($char eq '-') {
1957                         $diff_class = " rem";
1958                 } elsif ($char eq '@') {
1959                         $diff_class = " chunk_header";
1960                 } elsif ($char eq "\\") {
1961                         $diff_class = " incomplete";
1962                 }
1963         }
1964         $line = untabify($line);
1965         if ($from && $to && $line =~ m/^\@{2} /) {
1966                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1967                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1968
1969                 $from_lines = 0 unless defined $from_lines;
1970                 $to_lines   = 0 unless defined $to_lines;
1971
1972                 if ($from->{'href'}) {
1973                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1974                                              -class=>"list"}, $from_text);
1975                 }
1976                 if ($to->{'href'}) {
1977                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1978                                              -class=>"list"}, $to_text);
1979                 }
1980                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1981                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1982                 return "<div class=\"diff$diff_class\">$line</div>\n";
1983         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1984                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1985                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1986
1987                 @from_text = split(' ', $ranges);
1988                 for (my $i = 0; $i < @from_text; ++$i) {
1989                         ($from_start[$i], $from_nlines[$i]) =
1990                                 (split(',', substr($from_text[$i], 1)), 0);
1991                 }
1992
1993                 $to_text   = pop @from_text;
1994                 $to_start  = pop @from_start;
1995                 $to_nlines = pop @from_nlines;
1996
1997                 $line = "<span class=\"chunk_info\">$prefix ";
1998                 for (my $i = 0; $i < @from_text; ++$i) {
1999                         if ($from->{'href'}[$i]) {
2000                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2001                                                   -class=>"list"}, $from_text[$i]);
2002                         } else {
2003                                 $line .= $from_text[$i];
2004                         }
2005                         $line .= " ";
2006                 }
2007                 if ($to->{'href'}) {
2008                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2009                                           -class=>"list"}, $to_text);
2010                 } else {
2011                         $line .= $to_text;
2012                 }
2013                 $line .= " $prefix</span>" .
2014                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2015                 return "<div class=\"diff$diff_class\">$line</div>\n";
2016         }
2017         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2018 }
2019
2020 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2021 # linked.  Pass the hash of the tree/commit to snapshot.
2022 sub format_snapshot_links {
2023         my ($hash) = @_;
2024         my $num_fmts = @snapshot_fmts;
2025         if ($num_fmts > 1) {
2026                 # A parenthesized list of links bearing format names.
2027                 # e.g. "snapshot (_tar.gz_ _zip_)"
2028                 return "snapshot (" . join(' ', map
2029                         $cgi->a({
2030                                 -href => href(
2031                                         action=>"snapshot",
2032                                         hash=>$hash,
2033                                         snapshot_format=>$_
2034                                 )
2035                         }, $known_snapshot_formats{$_}{'display'})
2036                 , @snapshot_fmts) . ")";
2037         } elsif ($num_fmts == 1) {
2038                 # A single "snapshot" link whose tooltip bears the format name.
2039                 # i.e. "_snapshot_"
2040                 my ($fmt) = @snapshot_fmts;
2041                 return
2042                         $cgi->a({
2043                                 -href => href(
2044                                         action=>"snapshot",
2045                                         hash=>$hash,
2046                                         snapshot_format=>$fmt
2047                                 ),
2048                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2049                         }, "snapshot");
2050         } else { # $num_fmts == 0
2051                 return undef;
2052         }
2053 }
2054
2055 ## ......................................................................
2056 ## functions returning values to be passed, perhaps after some
2057 ## transformation, to other functions; e.g. returning arguments to href()
2058
2059 # returns hash to be passed to href to generate gitweb URL
2060 # in -title key it returns description of link
2061 sub get_feed_info {
2062         my $format = shift || 'Atom';
2063         my %res = (action => lc($format));
2064
2065         # feed links are possible only for project views
2066         return unless (defined $project);
2067         # some views should link to OPML, or to generic project feed,
2068         # or don't have specific feed yet (so they should use generic)
2069         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2070
2071         my $branch;
2072         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2073         # from tag links; this also makes possible to detect branch links
2074         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2075             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2076                 $branch = $1;
2077         }
2078         # find log type for feed description (title)
2079         my $type = 'log';
2080         if (defined $file_name) {
2081                 $type  = "history of $file_name";
2082                 $type .= "/" if ($action eq 'tree');
2083                 $type .= " on '$branch'" if (defined $branch);
2084         } else {
2085                 $type = "log of $branch" if (defined $branch);
2086         }
2087
2088         $res{-title} = $type;
2089         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2090         $res{'file_name'} = $file_name;
2091
2092         return %res;
2093 }
2094
2095 ## ----------------------------------------------------------------------
2096 ## git utility subroutines, invoking git commands
2097
2098 # returns path to the core git executable and the --git-dir parameter as list
2099 sub git_cmd {
2100         $number_of_git_cmds++;
2101         return $GIT, '--git-dir='.$git_dir;
2102 }
2103
2104 # quote the given arguments for passing them to the shell
2105 # quote_command("command", "arg 1", "arg with ' and ! characters")
2106 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2107 # Try to avoid using this function wherever possible.
2108 sub quote_command {
2109         return join(' ',
2110                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2111 }
2112
2113 # get HEAD ref of given project as hash
2114 sub git_get_head_hash {
2115         return git_get_full_hash(shift, 'HEAD');
2116 }
2117
2118 sub git_get_full_hash {
2119         return git_get_hash(@_);
2120 }
2121
2122 sub git_get_short_hash {
2123         return git_get_hash(@_, '--short=7');
2124 }
2125
2126 sub git_get_hash {
2127         my ($project, $hash, @options) = @_;
2128         my $o_git_dir = $git_dir;
2129         my $retval = undef;
2130         $git_dir = "$projectroot/$project";
2131         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2132             '--verify', '-q', @options, $hash) {
2133                 $retval = <$fd>;
2134                 chomp $retval if defined $retval;
2135                 close $fd;
2136         }
2137         if (defined $o_git_dir) {
2138                 $git_dir = $o_git_dir;
2139         }
2140         return $retval;
2141 }
2142
2143 # get type of given object
2144 sub git_get_type {
2145         my $hash = shift;
2146
2147         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2148         my $type = <$fd>;
2149         close $fd or return;
2150         chomp $type;
2151         return $type;
2152 }
2153
2154 # repository configuration
2155 our $config_file = '';
2156 our %config;
2157
2158 # store multiple values for single key as anonymous array reference
2159 # single values stored directly in the hash, not as [ <value> ]
2160 sub hash_set_multi {
2161         my ($hash, $key, $value) = @_;
2162
2163         if (!exists $hash->{$key}) {
2164                 $hash->{$key} = $value;
2165         } elsif (!ref $hash->{$key}) {
2166                 $hash->{$key} = [ $hash->{$key}, $value ];
2167         } else {
2168                 push @{$hash->{$key}}, $value;
2169         }
2170 }
2171
2172 # return hash of git project configuration
2173 # optionally limited to some section, e.g. 'gitweb'
2174 sub git_parse_project_config {
2175         my $section_regexp = shift;
2176         my %config;
2177
2178         local $/ = "\0";
2179
2180         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2181                 or return;
2182
2183         while (my $keyval = <$fh>) {
2184                 chomp $keyval;
2185                 my ($key, $value) = split(/\n/, $keyval, 2);
2186
2187                 hash_set_multi(\%config, $key, $value)
2188                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2189         }
2190         close $fh;
2191
2192         return %config;
2193 }
2194
2195 # convert config value to boolean: 'true' or 'false'
2196 # no value, number > 0, 'true' and 'yes' values are true
2197 # rest of values are treated as false (never as error)
2198 sub config_to_bool {
2199         my $val = shift;
2200
2201         return 1 if !defined $val;             # section.key
2202
2203         # strip leading and trailing whitespace
2204         $val =~ s/^\s+//;
2205         $val =~ s/\s+$//;
2206
2207         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2208                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2209 }
2210
2211 # convert config value to simple decimal number
2212 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2213 # to be multiplied by 1024, 1048576, or 1073741824
2214 sub config_to_int {
2215         my $val = shift;
2216
2217         # strip leading and trailing whitespace
2218         $val =~ s/^\s+//;
2219         $val =~ s/\s+$//;
2220
2221         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2222                 $unit = lc($unit);
2223                 # unknown unit is treated as 1
2224                 return $num * ($unit eq 'g' ? 1073741824 :
2225                                $unit eq 'm' ?    1048576 :
2226                                $unit eq 'k' ?       1024 : 1);
2227         }
2228         return $val;
2229 }
2230
2231 # convert config value to array reference, if needed
2232 sub config_to_multi {
2233         my $val = shift;
2234
2235         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2236 }
2237
2238 sub git_get_project_config {
2239         my ($key, $type) = @_;
2240
2241         return unless defined $git_dir;
2242
2243         # key sanity check
2244         return unless ($key);
2245         $key =~ s/^gitweb\.//;
2246         return if ($key =~ m/\W/);
2247
2248         # type sanity check
2249         if (defined $type) {
2250                 $type =~ s/^--//;
2251                 $type = undef
2252                         unless ($type eq 'bool' || $type eq 'int');
2253         }
2254
2255         # get config
2256         if (!defined $config_file ||
2257             $config_file ne "$git_dir/config") {
2258                 %config = git_parse_project_config('gitweb');
2259                 $config_file = "$git_dir/config";
2260         }
2261
2262         # check if config variable (key) exists
2263         return unless exists $config{"gitweb.$key"};
2264
2265         # ensure given type
2266         if (!defined $type) {
2267                 return $config{"gitweb.$key"};
2268         } elsif ($type eq 'bool') {
2269                 # backward compatibility: 'git config --bool' returns true/false
2270                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2271         } elsif ($type eq 'int') {
2272                 return config_to_int($config{"gitweb.$key"});
2273         }
2274         return $config{"gitweb.$key"};
2275 }
2276
2277 # get hash of given path at given ref
2278 sub git_get_hash_by_path {
2279         my $base = shift;
2280         my $path = shift || return undef;
2281         my $type = shift;
2282
2283         $path =~ s,/+$,,;
2284
2285         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2286                 or die_error(500, "Open git-ls-tree failed");
2287         my $line = <$fd>;
2288         close $fd or return undef;
2289
2290         if (!defined $line) {
2291                 # there is no tree or hash given by $path at $base
2292                 return undef;
2293         }
2294
2295         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2296         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2297         if (defined $type && $type ne $2) {
2298                 # type doesn't match
2299                 return undef;
2300         }
2301         return $3;
2302 }
2303
2304 # get path of entry with given hash at given tree-ish (ref)
2305 # used to get 'from' filename for combined diff (merge commit) for renames
2306 sub git_get_path_by_hash {
2307         my $base = shift || return;
2308         my $hash = shift || return;
2309
2310         local $/ = "\0";
2311
2312         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2313                 or return undef;
2314         while (my $line = <$fd>) {
2315                 chomp $line;
2316
2317                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2318                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2319                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2320                         close $fd;
2321                         return $1;
2322                 }
2323         }
2324         close $fd;
2325         return undef;
2326 }
2327
2328 ## ......................................................................
2329 ## git utility functions, directly accessing git repository
2330
2331 sub git_get_project_description {
2332         my $path = shift;
2333
2334         $git_dir = "$projectroot/$path";
2335         open my $fd, '<', "$git_dir/description"
2336                 or return git_get_project_config('description');
2337         my $descr = <$fd>;
2338         close $fd;
2339         if (defined $descr) {
2340                 chomp $descr;
2341         }
2342         return $descr;
2343 }
2344
2345 sub git_get_project_ctags {
2346         my $path = shift;
2347         my $ctags = {};
2348
2349         $git_dir = "$projectroot/$path";
2350         opendir my $dh, "$git_dir/ctags"
2351                 or return $ctags;
2352         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2353                 open my $ct, '<', $_ or next;
2354                 my $val = <$ct>;
2355                 chomp $val;
2356                 close $ct;
2357                 my $ctag = $_; $ctag =~ s#.*/##;
2358                 $ctags->{$ctag} = $val;
2359         }
2360         closedir $dh;
2361         $ctags;
2362 }
2363
2364 sub git_populate_project_tagcloud {
2365         my $ctags = shift;
2366
2367         # First, merge different-cased tags; tags vote on casing
2368         my %ctags_lc;
2369         foreach (keys %$ctags) {
2370                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2371                 if (not $ctags_lc{lc $_}->{topcount}
2372                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2373                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2374                         $ctags_lc{lc $_}->{topname} = $_;
2375                 }
2376         }
2377
2378         my $cloud;
2379         if (eval { require HTML::TagCloud; 1; }) {
2380                 $cloud = HTML::TagCloud->new;
2381                 foreach (sort keys %ctags_lc) {
2382                         # Pad the title with spaces so that the cloud looks
2383                         # less crammed.
2384                         my $title = $ctags_lc{$_}->{topname};
2385                         $title =~ s/ /&nbsp;/g;
2386                         $title =~ s/^/&nbsp;/g;
2387                         $title =~ s/$/&nbsp;/g;
2388                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2389                 }
2390         } else {
2391                 $cloud = \%ctags_lc;
2392         }
2393         $cloud;
2394 }
2395
2396 sub git_show_project_tagcloud {
2397         my ($cloud, $count) = @_;
2398         print STDERR ref($cloud)."..\n";
2399         if (ref $cloud eq 'HTML::TagCloud') {
2400                 return $cloud->html_and_css($count);
2401         } else {
2402                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2403                 return '<p align="center">' . join (', ', map {
2404                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2405                 } splice(@tags, 0, $count)) . '</p>';
2406         }
2407 }
2408
2409 sub git_get_project_url_list {
2410         my $path = shift;
2411
2412         $git_dir = "$projectroot/$path";
2413         open my $fd, '<', "$git_dir/cloneurl"
2414                 or return wantarray ?
2415                 @{ config_to_multi(git_get_project_config('url')) } :
2416                    config_to_multi(git_get_project_config('url'));
2417         my @git_project_url_list = map { chomp; $_ } <$fd>;
2418         close $fd;
2419
2420         return wantarray ? @git_project_url_list : \@git_project_url_list;
2421 }
2422
2423 sub git_get_projects_list {
2424         my ($filter) = @_;
2425         my @list;
2426
2427         $filter ||= '';
2428         $filter =~ s/\.git$//;
2429
2430         my $check_forks = gitweb_check_feature('forks');
2431
2432         if (-d $projects_list) {
2433                 # search in directory
2434                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2435                 # remove the trailing "/"
2436                 $dir =~ s!/+$!!;
2437                 my $pfxlen = length("$dir");
2438                 my $pfxdepth = ($dir =~ tr!/!!);
2439
2440                 File::Find::find({
2441                         follow_fast => 1, # follow symbolic links
2442                         follow_skip => 2, # ignore duplicates
2443                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2444                         wanted => sub {
2445                                 # global variables
2446                                 our $project_maxdepth;
2447                                 our $projectroot;
2448                                 # skip project-list toplevel, if we get it.
2449                                 return if (m!^[/.]$!);
2450                                 # only directories can be git repositories
2451                                 return unless (-d $_);
2452                                 # don't traverse too deep (Find is super slow on os x)
2453                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2454                                         $File::Find::prune = 1;
2455                                         return;
2456                                 }
2457
2458                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2459                                 # we check related file in $projectroot
2460                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2461                                 if (check_export_ok("$projectroot/$path")) {
2462                                         push @list, { path => $path };
2463                                         $File::Find::prune = 1;
2464                                 }
2465                         },
2466                 }, "$dir");
2467
2468         } elsif (-f $projects_list) {
2469                 # read from file(url-encoded):
2470                 # 'git%2Fgit.git Linus+Torvalds'
2471                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2472                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2473                 my %paths;
2474                 open my $fd, '<', $projects_list or return;
2475         PROJECT:
2476                 while (my $line = <$fd>) {
2477                         chomp $line;
2478                         my ($path, $owner) = split ' ', $line;
2479                         $path = unescape($path);
2480                         $owner = unescape($owner);
2481                         if (!defined $path) {
2482                                 next;
2483                         }
2484                         if ($filter ne '') {
2485                                 # looking for forks;
2486                                 my $pfx = substr($path, 0, length($filter));
2487                                 if ($pfx ne $filter) {
2488                                         next PROJECT;
2489                                 }
2490                                 my $sfx = substr($path, length($filter));
2491                                 if ($sfx !~ /^\/.*\.git$/) {
2492                                         next PROJECT;
2493                                 }
2494                         } elsif ($check_forks) {
2495                         PATH:
2496                                 foreach my $filter (keys %paths) {
2497                                         # looking for forks;
2498                                         my $pfx = substr($path, 0, length($filter));
2499                                         if ($pfx ne $filter) {
2500                                                 next PATH;
2501                                         }
2502                                         my $sfx = substr($path, length($filter));
2503                                         if ($sfx !~ /^\/.*\.git$/) {
2504                                                 next PATH;
2505                                         }
2506                                         # is a fork, don't include it in
2507                                         # the list
2508                                         next PROJECT;
2509                                 }
2510                         }
2511                         if (check_export_ok("$projectroot/$path")) {
2512                                 my $pr = {
2513                                         path => $path,
2514                                         owner => to_utf8($owner),
2515                                 };
2516                                 push @list, $pr;
2517                                 (my $forks_path = $path) =~ s/\.git$//;
2518                                 $paths{$forks_path}++;
2519                         }
2520                 }
2521                 close $fd;
2522         }
2523         return @list;
2524 }
2525
2526 our $gitweb_project_owner = undef;
2527 sub git_get_project_list_from_file {
2528
2529         return if (defined $gitweb_project_owner);
2530
2531         $gitweb_project_owner = {};
2532         # read from file (url-encoded):
2533         # 'git%2Fgit.git Linus+Torvalds'
2534         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2535         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2536         if (-f $projects_list) {
2537                 open(my $fd, '<', $projects_list);
2538                 while (my $line = <$fd>) {
2539                         chomp $line;
2540                         my ($pr, $ow) = split ' ', $line;
2541                         $pr = unescape($pr);
2542                         $ow = unescape($ow);
2543                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2544                 }
2545                 close $fd;
2546         }
2547 }
2548
2549 sub git_get_project_owner {
2550         my $project = shift;
2551         my $owner;
2552
2553         return undef unless $project;
2554         $git_dir = "$projectroot/$project";
2555
2556         if (!defined $gitweb_project_owner) {
2557                 git_get_project_list_from_file();
2558         }
2559
2560         if (exists $gitweb_project_owner->{$project}) {
2561                 $owner = $gitweb_project_owner->{$project};
2562         }
2563         if (!defined $owner){
2564                 $owner = git_get_project_config('owner');
2565         }
2566         if (!defined $owner) {
2567                 $owner = get_file_owner("$git_dir");
2568         }
2569
2570         return $owner;
2571 }
2572
2573 sub git_get_last_activity {
2574         my ($path) = @_;
2575         my $fd;
2576
2577         $git_dir = "$projectroot/$path";
2578         open($fd, "-|", git_cmd(), 'for-each-ref',
2579              '--format=%(committer)',
2580              '--sort=-committerdate',
2581              '--count=1',
2582              'refs/heads') or return;
2583         my $most_recent = <$fd>;
2584         close $fd or return;
2585         if (defined $most_recent &&
2586             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2587                 my $timestamp = $1;
2588                 my $age = time - $timestamp;
2589                 return ($age, age_string($age));
2590         }
2591         return (undef, undef);
2592 }
2593
2594 sub git_get_references {
2595         my $type = shift || "";
2596         my %refs;
2597         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2598         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2599         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2600                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2601                 or return;
2602
2603         while (my $line = <$fd>) {
2604                 chomp $line;
2605                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2606                         if (defined $refs{$1}) {
2607                                 push @{$refs{$1}}, $2;
2608                         } else {
2609                                 $refs{$1} = [ $2 ];
2610                         }
2611                 }
2612         }
2613         close $fd or return;
2614         return \%refs;
2615 }
2616
2617 sub git_get_rev_name_tags {
2618         my $hash = shift || return undef;
2619
2620         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2621                 or return;
2622         my $name_rev = <$fd>;
2623         close $fd;
2624
2625         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2626                 return $1;
2627         } else {
2628                 # catches also '$hash undefined' output
2629                 return undef;
2630         }
2631 }
2632
2633 ## ----------------------------------------------------------------------
2634 ## parse to hash functions
2635
2636 sub parse_date {
2637         my $epoch = shift;
2638         my $tz = shift || "-0000";
2639
2640         my %date;
2641         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2642         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2643         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2644         $date{'hour'} = $hour;
2645         $date{'minute'} = $min;
2646         $date{'mday'} = $mday;
2647         $date{'day'} = $days[$wday];
2648         $date{'month'} = $months[$mon];
2649         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2650                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2651         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2652                              $mday, $months[$mon], $hour ,$min;
2653         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2654                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2655
2656         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2657         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2658         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2659         $date{'hour_local'} = $hour;
2660         $date{'minute_local'} = $min;
2661         $date{'tz_local'} = $tz;
2662         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2663                                   1900+$year, $mon+1, $mday,
2664                                   $hour, $min, $sec, $tz);
2665         return %date;
2666 }
2667
2668 sub parse_tag {
2669         my $tag_id = shift;
2670         my %tag;
2671         my @comment;
2672
2673         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2674         $tag{'id'} = $tag_id;
2675         while (my $line = <$fd>) {
2676                 chomp $line;
2677                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2678                         $tag{'object'} = $1;
2679                 } elsif ($line =~ m/^type (.+)$/) {
2680                         $tag{'type'} = $1;
2681                 } elsif ($line =~ m/^tag (.+)$/) {
2682                         $tag{'name'} = $1;
2683                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2684                         $tag{'author'} = $1;
2685                         $tag{'author_epoch'} = $2;
2686                         $tag{'author_tz'} = $3;
2687                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2688                                 $tag{'author_name'}  = $1;
2689                                 $tag{'author_email'} = $2;
2690                         } else {
2691                                 $tag{'author_name'} = $tag{'author'};
2692                         }
2693                 } elsif ($line =~ m/--BEGIN/) {
2694                         push @comment, $line;
2695                         last;
2696                 } elsif ($line eq "") {
2697                         last;
2698                 }
2699         }
2700         push @comment, <$fd>;
2701         $tag{'comment'} = \@comment;
2702         close $fd or return;
2703         if (!defined $tag{'name'}) {
2704                 return
2705         };
2706         return %tag
2707 }
2708
2709 sub parse_commit_text {
2710         my ($commit_text, $withparents) = @_;
2711         my @commit_lines = split '\n', $commit_text;
2712         my %co;
2713
2714         pop @commit_lines; # Remove '\0'
2715
2716         if (! @commit_lines) {
2717                 return;
2718         }
2719
2720         my $header = shift @commit_lines;
2721         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2722                 return;
2723         }
2724         ($co{'id'}, my @parents) = split ' ', $header;
2725         while (my $line = shift @commit_lines) {
2726                 last if $line eq "\n";
2727                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2728                         $co{'tree'} = $1;
2729                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2730                         push @parents, $1;
2731                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2732                         $co{'author'} = to_utf8($1);
2733                         $co{'author_epoch'} = $2;
2734                         $co{'author_tz'} = $3;
2735                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2736                                 $co{'author_name'}  = $1;
2737                                 $co{'author_email'} = $2;
2738                         } else {
2739                                 $co{'author_name'} = $co{'author'};
2740                         }
2741                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2742                         $co{'committer'} = to_utf8($1);
2743                         $co{'committer_epoch'} = $2;
2744                         $co{'committer_tz'} = $3;
2745                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2746                                 $co{'committer_name'}  = $1;
2747                                 $co{'committer_email'} = $2;
2748                         } else {
2749                                 $co{'committer_name'} = $co{'committer'};
2750                         }
2751                 }
2752         }
2753         if (!defined $co{'tree'}) {
2754                 return;
2755         };
2756         $co{'parents'} = \@parents;
2757         $co{'parent'} = $parents[0];
2758
2759         foreach my $title (@commit_lines) {
2760                 $title =~ s/^    //;
2761                 if ($title ne "") {
2762                         $co{'title'} = chop_str($title, 80, 5);
2763                         # remove leading stuff of merges to make the interesting part visible
2764                         if (length($title) > 50) {
2765                                 $title =~ s/^Automatic //;
2766                                 $title =~ s/^merge (of|with) /Merge ... /i;
2767                                 if (length($title) > 50) {
2768                                         $title =~ s/(http|rsync):\/\///;
2769                                 }
2770                                 if (length($title) > 50) {
2771                                         $title =~ s/(master|www|rsync)\.//;
2772                                 }
2773                                 if (length($title) > 50) {
2774                                         $title =~ s/kernel.org:?//;
2775                                 }
2776                                 if (length($title) > 50) {
2777                                         $title =~ s/\/pub\/scm//;
2778                                 }
2779                         }
2780                         $co{'title_short'} = chop_str($title, 50, 5);
2781                         last;
2782                 }
2783         }
2784         if (! defined $co{'title'} || $co{'title'} eq "") {
2785                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2786         }
2787         # remove added spaces
2788         foreach my $line (@commit_lines) {
2789                 $line =~ s/^    //;
2790         }
2791         $co{'comment'} = \@commit_lines;
2792
2793         my $age = time - $co{'committer_epoch'};
2794         $co{'age'} = $age;
2795         $co{'age_string'} = age_string($age);
2796         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2797         if ($age > 60*60*24*7*2) {
2798                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2799                 $co{'age_string_age'} = $co{'age_string'};
2800         } else {
2801                 $co{'age_string_date'} = $co{'age_string'};
2802                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2803         }
2804         return %co;
2805 }
2806
2807 sub parse_commit {
2808         my ($commit_id) = @_;
2809         my %co;
2810
2811         local $/ = "\0";
2812
2813         open my $fd, "-|", git_cmd(), "rev-list",
2814                 "--parents",
2815                 "--header",
2816                 "--max-count=1",
2817                 $commit_id,
2818                 "--",
2819                 or die_error(500, "Open git-rev-list failed");
2820         %co = parse_commit_text(<$fd>, 1);
2821         close $fd;
2822
2823         return %co;
2824 }
2825
2826 sub parse_commits {
2827         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2828         my @cos;
2829
2830         $maxcount ||= 1;
2831         $skip ||= 0;
2832
2833         local $/ = "\0";
2834
2835         open my $fd, "-|", git_cmd(), "rev-list",
2836                 "--header",
2837                 @args,
2838                 ("--max-count=" . $maxcount),
2839                 ("--skip=" . $skip),
2840                 @extra_options,
2841                 $commit_id,
2842                 "--",
2843                 ($filename ? ($filename) : ())
2844                 or die_error(500, "Open git-rev-list failed");
2845         while (my $line = <$fd>) {
2846                 my %co = parse_commit_text($line);
2847                 push @cos, \%co;
2848         }
2849         close $fd;
2850
2851         return wantarray ? @cos : \@cos;
2852 }
2853
2854 # parse line of git-diff-tree "raw" output
2855 sub parse_difftree_raw_line {
2856         my $line = shift;
2857         my %res;
2858
2859         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2860         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2861         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2862                 $res{'from_mode'} = $1;
2863                 $res{'to_mode'} = $2;
2864                 $res{'from_id'} = $3;
2865                 $res{'to_id'} = $4;
2866                 $res{'status'} = $5;
2867                 $res{'similarity'} = $6;
2868                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2869                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2870                 } else {
2871                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2872                 }
2873         }
2874         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2875         # combined diff (for merge commit)
2876         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2877                 $res{'nparents'}  = length($1);
2878                 $res{'from_mode'} = [ split(' ', $2) ];
2879                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2880                 $res{'from_id'} = [ split(' ', $3) ];
2881                 $res{'to_id'} = pop @{$res{'from_id'}};
2882                 $res{'status'} = [ split('', $4) ];
2883                 $res{'to_file'} = unquote($5);
2884         }
2885         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2886         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2887                 $res{'commit'} = $1;
2888         }
2889
2890         return wantarray ? %res : \%res;
2891 }
2892
2893 # wrapper: return parsed line of git-diff-tree "raw" output
2894 # (the argument might be raw line, or parsed info)
2895 sub parsed_difftree_line {
2896         my $line_or_ref = shift;
2897
2898         if (ref($line_or_ref) eq "HASH") {
2899                 # pre-parsed (or generated by hand)
2900                 return $line_or_ref;
2901         } else {
2902                 return parse_difftree_raw_line($line_or_ref);
2903         }
2904 }
2905
2906 # parse line of git-ls-tree output
2907 sub parse_ls_tree_line {
2908         my $line = shift;
2909         my %opts = @_;
2910         my %res;
2911
2912         if ($opts{'-l'}) {
2913                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2914                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2915
2916                 $res{'mode'} = $1;
2917                 $res{'type'} = $2;
2918                 $res{'hash'} = $3;
2919                 $res{'size'} = $4;
2920                 if ($opts{'-z'}) {
2921                         $res{'name'} = $5;
2922                 } else {
2923                         $res{'name'} = unquote($5);
2924                 }
2925         } else {
2926                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2927                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2928
2929                 $res{'mode'} = $1;
2930                 $res{'type'} = $2;
2931                 $res{'hash'} = $3;
2932                 if ($opts{'-z'}) {
2933                         $res{'name'} = $4;
2934                 } else {
2935                         $res{'name'} = unquote($4);
2936                 }
2937         }
2938
2939         return wantarray ? %res : \%res;
2940 }
2941
2942 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2943 sub parse_from_to_diffinfo {
2944         my ($diffinfo, $from, $to, @parents) = @_;
2945
2946         if ($diffinfo->{'nparents'}) {
2947                 # combined diff
2948                 $from->{'file'} = [];
2949                 $from->{'href'} = [];
2950                 fill_from_file_info($diffinfo, @parents)
2951                         unless exists $diffinfo->{'from_file'};
2952                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2953                         $from->{'file'}[$i] =
2954                                 defined $diffinfo->{'from_file'}[$i] ?
2955                                         $diffinfo->{'from_file'}[$i] :
2956                                         $diffinfo->{'to_file'};
2957                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2958                                 $from->{'href'}[$i] = href(action=>"blob",
2959                                                            hash_base=>$parents[$i],
2960                                                            hash=>$diffinfo->{'from_id'}[$i],
2961                                                            file_name=>$from->{'file'}[$i]);
2962                         } else {
2963                                 $from->{'href'}[$i] = undef;
2964                         }
2965                 }
2966         } else {
2967                 # ordinary (not combined) diff
2968                 $from->{'file'} = $diffinfo->{'from_file'};
2969                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2970                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2971                                                hash=>$diffinfo->{'from_id'},
2972                                                file_name=>$from->{'file'});
2973                 } else {
2974                         delete $from->{'href'};
2975                 }
2976         }
2977
2978         $to->{'file'} = $diffinfo->{'to_file'};
2979         if (!is_deleted($diffinfo)) { # file exists in result
2980                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2981                                      hash=>$diffinfo->{'to_id'},
2982                                      file_name=>$to->{'file'});
2983         } else {
2984                 delete $to->{'href'};
2985         }
2986 }
2987
2988 ## ......................................................................
2989 ## parse to array of hashes functions
2990
2991 sub git_get_heads_list {
2992         my $limit = shift;
2993         my @headslist;
2994
2995         open my $fd, '-|', git_cmd(), 'for-each-ref',
2996                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2997                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2998                 'refs/heads'
2999                 or return;
3000         while (my $line = <$fd>) {
3001                 my %ref_item;
3002
3003                 chomp $line;
3004                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3005                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3006                 my ($committer, $epoch, $tz) =
3007                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3008                 $ref_item{'fullname'}  = $name;
3009                 $name =~ s!^refs/heads/!!;
3010
3011                 $ref_item{'name'}  = $name;
3012                 $ref_item{'id'}    = $hash;
3013                 $ref_item{'title'} = $title || '(no commit message)';
3014                 $ref_item{'epoch'} = $epoch;
3015                 if ($epoch) {
3016                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3017                 } else {
3018                         $ref_item{'age'} = "unknown";
3019                 }
3020
3021                 push @headslist, \%ref_item;
3022         }
3023         close $fd;
3024
3025         return wantarray ? @headslist : \@headslist;
3026 }
3027
3028 sub git_get_tags_list {
3029         my $limit = shift;
3030         my @tagslist;
3031
3032         open my $fd, '-|', git_cmd(), 'for-each-ref',
3033                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3034                 '--format=%(objectname) %(objecttype) %(refname) '.
3035                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3036                 'refs/tags'
3037                 or return;
3038         while (my $line = <$fd>) {
3039                 my %ref_item;
3040
3041                 chomp $line;
3042                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3043                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3044                 my ($creator, $epoch, $tz) =
3045                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3046                 $ref_item{'fullname'} = $name;
3047                 $name =~ s!^refs/tags/!!;
3048
3049                 $ref_item{'type'} = $type;
3050                 $ref_item{'id'} = $id;
3051                 $ref_item{'name'} = $name;
3052                 if ($type eq "tag") {
3053                         $ref_item{'subject'} = $title;
3054                         $ref_item{'reftype'} = $reftype;
3055                         $ref_item{'refid'}   = $refid;
3056                 } else {
3057                         $ref_item{'reftype'} = $type;
3058                         $ref_item{'refid'}   = $id;
3059                 }
3060
3061                 if ($type eq "tag" || $type eq "commit") {
3062                         $ref_item{'epoch'} = $epoch;
3063                         if ($epoch) {
3064                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3065                         } else {
3066                                 $ref_item{'age'} = "unknown";
3067                         }
3068                 }
3069
3070                 push @tagslist, \%ref_item;
3071         }
3072         close $fd;
3073
3074         return wantarray ? @tagslist : \@tagslist;
3075 }
3076
3077 ## ----------------------------------------------------------------------
3078 ## filesystem-related functions
3079
3080 sub get_file_owner {
3081         my $path = shift;
3082
3083         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3084         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3085         if (!defined $gcos) {
3086                 return undef;
3087         }
3088         my $owner = $gcos;
3089         $owner =~ s/[,;].*$//;
3090         return to_utf8($owner);
3091 }
3092
3093 # assume that file exists
3094 sub insert_file {
3095         my $filename = shift;
3096
3097         open my $fd, '<', $filename;
3098         print map { to_utf8($_) } <$fd>;
3099         close $fd;
3100 }
3101
3102 ## ......................................................................
3103 ## mimetype related functions
3104
3105 sub mimetype_guess_file {
3106         my $filename = shift;
3107         my $mimemap = shift;
3108         -r $mimemap or return undef;
3109
3110         my %mimemap;
3111         open(my $mh, '<', $mimemap) or return undef;
3112         while (<$mh>) {
3113                 next if m/^#/; # skip comments
3114                 my ($mimetype, $exts) = split(/\t+/);
3115                 if (defined $exts) {
3116                         my @exts = split(/\s+/, $exts);
3117                         foreach my $ext (@exts) {
3118                                 $mimemap{$ext} = $mimetype;
3119                         }
3120                 }
3121         }
3122         close($mh);
3123
3124         $filename =~ /\.([^.]*)$/;
3125         return $mimemap{$1};
3126 }
3127
3128 sub mimetype_guess {
3129         my $filename = shift;
3130         my $mime;
3131         $filename =~ /\./ or return undef;
3132
3133         if ($mimetypes_file) {
3134                 my $file = $mimetypes_file;
3135                 if ($file !~ m!^/!) { # if it is relative path
3136                         # it is relative to project
3137                         $file = "$projectroot/$project/$file";
3138                 }
3139                 $mime = mimetype_guess_file($filename, $file);
3140         }
3141         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3142         return $mime;
3143 }
3144
3145 sub blob_mimetype {
3146         my $fd = shift;
3147         my $filename = shift;
3148
3149         if ($filename) {
3150                 my $mime = mimetype_guess($filename);
3151                 $mime and return $mime;
3152         }
3153
3154         # just in case
3155         return $default_blob_plain_mimetype unless $fd;
3156
3157         if (-T $fd) {
3158                 return 'text/plain';
3159         } elsif (! $filename) {
3160                 return 'application/octet-stream';
3161         } elsif ($filename =~ m/\.png$/i) {
3162                 return 'image/png';
3163         } elsif ($filename =~ m/\.gif$/i) {
3164                 return 'image/gif';
3165         } elsif ($filename =~ m/\.jpe?g$/i) {
3166                 return 'image/jpeg';
3167         } else {
3168                 return 'application/octet-stream';
3169         }
3170 }
3171
3172 sub blob_contenttype {
3173         my ($fd, $file_name, $type) = @_;
3174
3175         $type ||= blob_mimetype($fd, $file_name);
3176         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3177                 $type .= "; charset=$default_text_plain_charset";
3178         }
3179
3180         return $type;
3181 }
3182
3183 ## ======================================================================
3184 ## functions printing HTML: header, footer, error page
3185
3186 sub get_page_title {
3187         my $title = to_utf8($site_name);
3188
3189         return $title unless (defined $project);
3190         $title .= " - " . to_utf8($project);
3191
3192         return $title unless (defined $action);
3193         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3194
3195         return $title unless (defined $file_name);
3196         $title .= " - " . esc_path($file_name);
3197         if ($action eq "tree" && $file_name !~ m|/$|) {
3198                 $title .= "/";
3199         }
3200
3201         return $title;
3202 }
3203
3204 sub git_header_html {
3205         my $status = shift || "200 OK";
3206         my $expires = shift;
3207         my %opts = @_;
3208
3209         my $title = get_page_title();
3210         my $content_type;
3211         # require explicit support from the UA if we are to send the page as
3212         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3213         # we have to do this because MSIE sometimes globs '*/*', pretending to
3214         # support xhtml+xml but choking when it gets what it asked for.
3215         if (defined $cgi->http('HTTP_ACCEPT') &&
3216             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3217             $cgi->Accept('application/xhtml+xml') != 0) {
3218                 $content_type = 'application/xhtml+xml';
3219         } else {
3220                 $content_type = 'text/html';
3221         }
3222         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3223                            -status=> $status, -expires => $expires)
3224                 unless ($opts{'-no_http_headers'});
3225         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3226         print <<EOF;
3227 <?xml version="1.0" encoding="utf-8"?>
3228 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3229 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3230 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3231 <!-- git core binaries version $git_version -->
3232 <head>
3233 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3234 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3235 <meta name="robots" content="index, nofollow"/>
3236 <title>$title</title>
3237 EOF
3238         # the stylesheet, favicon etc urls won't work correctly with path_info
3239         # unless we set the appropriate base URL
3240         if ($ENV{'PATH_INFO'}) {
3241                 print "<base href=\"".esc_url($base_url)."\" />\n";
3242         }
3243         # print out each stylesheet that exist, providing backwards capability
3244         # for those people who defined $stylesheet in a config file
3245         if (defined $stylesheet) {
3246                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3247         } else {
3248                 foreach my $stylesheet (@stylesheets) {
3249                         next unless $stylesheet;
3250                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3251                 }
3252         }
3253         if (defined $project) {
3254                 my %href_params = get_feed_info();
3255                 if (!exists $href_params{'-title'}) {
3256                         $href_params{'-title'} = 'log';
3257                 }
3258
3259                 foreach my $format qw(RSS Atom) {
3260                         my $type = lc($format);
3261                         my %link_attr = (
3262                                 '-rel' => 'alternate',
3263                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3264                                 '-type' => "application/$type+xml"
3265                         );
3266
3267                         $href_params{'action'} = $type;
3268                         $link_attr{'-href'} = href(%href_params);
3269                         print "<link ".
3270                               "rel=\"$link_attr{'-rel'}\" ".
3271                               "title=\"$link_attr{'-title'}\" ".
3272                               "href=\"$link_attr{'-href'}\" ".
3273                               "type=\"$link_attr{'-type'}\" ".
3274                               "/>\n";
3275
3276                         $href_params{'extra_options'} = '--no-merges';
3277                         $link_attr{'-href'} = href(%href_params);
3278                         $link_attr{'-title'} .= ' (no merges)';
3279                         print "<link ".
3280                               "rel=\"$link_attr{'-rel'}\" ".
3281                               "title=\"$link_attr{'-title'}\" ".
3282                               "href=\"$link_attr{'-href'}\" ".
3283                               "type=\"$link_attr{'-type'}\" ".
3284                               "/>\n";
3285                 }
3286
3287         } else {
3288                 printf('<link rel="alternate" title="%s projects list" '.
3289                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3290                        $site_name, href(project=>undef, action=>"project_index"));
3291                 printf('<link rel="alternate" title="%s projects feeds" '.
3292                        'href="%s" type="text/x-opml" />'."\n",
3293                        $site_name, href(project=>undef, action=>"opml"));
3294         }
3295         if (defined $favicon) {
3296                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3297         }
3298
3299         print "</head>\n" .
3300               "<body>\n";
3301
3302         if (defined $site_header && -f $site_header) {
3303                 insert_file($site_header);
3304         }
3305
3306         print "<div class=\"page_header\">\n" .
3307               $cgi->a({-href => esc_url($logo_url),
3308                        -title => $logo_label},
3309                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3310         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3311         if (defined $project) {
3312                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3313                 if (defined $action) {
3314                         print " / $action";
3315                 }
3316                 print "\n";
3317         }
3318         print "</div>\n";
3319
3320         my $have_search = gitweb_check_feature('search');
3321         if (defined $project && $have_search) {
3322                 if (!defined $searchtext) {
3323                         $searchtext = "";
3324                 }
3325                 my $search_hash;
3326                 if (defined $hash_base) {
3327                         $search_hash = $hash_base;
3328                 } elsif (defined $hash) {
3329                         $search_hash = $hash;
3330                 } else {
3331                         $search_hash = "HEAD";
3332                 }
3333                 my $action = $my_uri;
3334                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3335                 if ($use_pathinfo) {
3336                         $action .= "/".esc_url($project);
3337                 }
3338                 print $cgi->startform(-method => "get", -action => $action) .
3339                       "<div class=\"search\">\n" .
3340                       (!$use_pathinfo &&
3341                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3342                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3343                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3344                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3345                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3346                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3347                       " search:\n",
3348                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3349                       "<span title=\"Extended regular expression\">" .
3350                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3351                                      -checked => $search_use_regexp) .
3352                       "</span>" .
3353                       "</div>" .
3354                       $cgi->end_form() . "\n";
3355         }
3356 }
3357
3358 sub git_footer_html {
3359         my $feed_class = 'rss_logo';
3360
3361         print "<div class=\"page_footer\">\n";
3362         if (defined $project) {
3363                 my $descr = git_get_project_description($project);
3364                 if (defined $descr) {
3365                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3366                 }
3367
3368                 my %href_params = get_feed_info();
3369                 if (!%href_params) {
3370                         $feed_class .= ' generic';
3371                 }
3372                 $href_params{'-title'} ||= 'log';
3373
3374                 foreach my $format qw(RSS Atom) {
3375                         $href_params{'action'} = lc($format);
3376                         print $cgi->a({-href => href(%href_params),
3377                                       -title => "$href_params{'-title'} $format feed",
3378                                       -class => $feed_class}, $format)."\n";
3379                 }
3380
3381         } else {
3382                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3383                               -class => $feed_class}, "OPML") . " ";
3384                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3385                               -class => $feed_class}, "TXT") . "\n";
3386         }
3387         print "</div>\n"; # class="page_footer"
3388
3389         if (defined $t0 && gitweb_check_feature('timed')) {
3390                 print "<div id=\"generating_info\">\n";
3391                 print 'This page took '.
3392                       '<span id="generating_time" class="time_span">'.
3393                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3394                       ' seconds </span>'.
3395                       ' and '.
3396                       '<span id="generating_cmd">'.
3397                       $number_of_git_cmds.
3398                       '</span> git commands '.
3399                       " to generate.\n";
3400                 print "</div>\n"; # class="page_footer"
3401         }
3402
3403         if (defined $site_footer && -f $site_footer) {
3404                 insert_file($site_footer);
3405         }
3406
3407         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3408         if (defined $action &&
3409             $action eq 'blame_incremental') {
3410                 print qq!<script type="text/javascript">\n!.
3411                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3412                       qq!           "!. href() .qq!");\n!.
3413                       qq!</script>\n!;
3414         } elsif (gitweb_check_feature('javascript-actions')) {
3415                 print qq!<script type="text/javascript">\n!.
3416                       qq!window.onload = fixLinks;\n!.
3417                       qq!</script>\n!;
3418         }
3419
3420         print "</body>\n" .
3421               "</html>";
3422 }
3423
3424 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3425 # Example: die_error(404, 'Hash not found')
3426 # By convention, use the following status codes (as defined in RFC 2616):
3427 # 400: Invalid or missing CGI parameters, or
3428 #      requested object exists but has wrong type.
3429 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3430 #      this server or project.
3431 # 404: Requested object/revision/project doesn't exist.
3432 # 500: The server isn't configured properly, or
3433 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3434 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3435 # 503: The server is currently unavailable (because it is overloaded,
3436 #      or down for maintenance).  Generally, this is a temporary state.
3437 sub die_error {
3438         my $status = shift || 500;
3439         my $error = esc_html(shift) || "Internal Server Error";
3440         my $extra = shift;
3441         my %opts = @_;
3442
3443         my %http_responses = (
3444                 400 => '400 Bad Request',
3445                 403 => '403 Forbidden',
3446                 404 => '404 Not Found',
3447                 500 => '500 Internal Server Error',
3448                 503 => '503 Service Unavailable',
3449         );
3450         git_header_html($http_responses{$status}, undef, %opts);
3451         print <<EOF;
3452 <div class="page_body">
3453 <br /><br />
3454 $status - $error
3455 <br />
3456 EOF
3457         if (defined $extra) {
3458                 print "<hr />\n" .
3459                       "$extra\n";
3460         }
3461         print "</div>\n";
3462
3463         git_footer_html();
3464         goto DONE_GITWEB
3465                 unless ($opts{'-error_handler'});
3466 }
3467
3468 ## ----------------------------------------------------------------------
3469 ## functions printing or outputting HTML: navigation
3470
3471 sub git_print_page_nav {
3472         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3473         $extra = '' if !defined $extra; # pager or formats
3474
3475         my @navs = qw(summary shortlog log commit commitdiff tree);
3476         if ($suppress) {
3477                 @navs = grep { $_ ne $suppress } @navs;
3478         }
3479
3480         my %arg = map { $_ => {action=>$_} } @navs;
3481         if (defined $head) {
3482                 for (qw(commit commitdiff)) {
3483                         $arg{$_}{'hash'} = $head;
3484                 }
3485                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3486                         for (qw(shortlog log)) {
3487                                 $arg{$_}{'hash'} = $head;
3488                         }
3489                 }
3490         }
3491
3492         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3493         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3494
3495         my @actions = gitweb_get_feature('actions');
3496         my %repl = (
3497                 '%' => '%',
3498                 'n' => $project,         # project name
3499                 'f' => $git_dir,         # project path within filesystem
3500                 'h' => $treehead || '',  # current hash ('h' parameter)
3501                 'b' => $treebase || '',  # hash base ('hb' parameter)
3502         );
3503         while (@actions) {
3504                 my ($label, $link, $pos) = splice(@actions,0,3);
3505                 # insert
3506                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3507                 # munch munch
3508                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3509                 $arg{$label}{'_href'} = $link;
3510         }
3511
3512         print "<div class=\"page_nav\">\n" .
3513                 (join " | ",
3514                  map { $_ eq $current ?
3515                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3516                  } @navs);
3517         print "<br/>\n$extra<br/>\n" .
3518               "</div>\n";
3519 }
3520
3521 sub format_paging_nav {
3522         my ($action, $page, $has_next_link) = @_;
3523         my $paging_nav;
3524
3525
3526         if ($page > 0) {
3527                 $paging_nav .=
3528                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3529                         " &sdot; " .
3530                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3531                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3532         } else {
3533                 $paging_nav .= "first &sdot; prev";
3534         }
3535
3536         if ($has_next_link) {
3537                 $paging_nav .= " &sdot; " .
3538                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3539                                  -accesskey => "n", -title => "Alt-n"}, "next");
3540         } else {
3541                 $paging_nav .= " &sdot; next";
3542         }
3543
3544         return $paging_nav;
3545 }
3546
3547 ## ......................................................................
3548 ## functions printing or outputting HTML: div
3549
3550 sub git_print_header_div {
3551         my ($action, $title, $hash, $hash_base) = @_;
3552         my %args = ();
3553
3554         $args{'action'} = $action;
3555         $args{'hash'} = $hash if $hash;
3556         $args{'hash_base'} = $hash_base if $hash_base;
3557
3558         print "<div class=\"header\">\n" .
3559               $cgi->a({-href => href(%args), -class => "title"},
3560               $title ? $title : $action) .
3561               "\n</div>\n";
3562 }
3563
3564 sub print_local_time {
3565         print format_local_time(@_);
3566 }
3567
3568 sub format_local_time {
3569         my $localtime = '';
3570         my %date = @_;
3571         if ($date{'hour_local'} < 6) {
3572                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3573                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3574         } else {
3575                 $localtime .= sprintf(" (%02d:%02d %s)",
3576                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3577         }
3578
3579         return $localtime;
3580 }
3581
3582 # Outputs the author name and date in long form
3583 sub git_print_authorship {
3584         my $co = shift;
3585         my %opts = @_;
3586         my $tag = $opts{-tag} || 'div';
3587         my $author = $co->{'author_name'};
3588
3589         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3590         print "<$tag class=\"author_date\">" .
3591               format_search_author($author, "author", esc_html($author)) .
3592               " [$ad{'rfc2822'}";
3593         print_local_time(%ad) if ($opts{-localtime});
3594         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3595                   . "</$tag>\n";
3596 }
3597
3598 # Outputs table rows containing the full author or committer information,
3599 # in the format expected for 'commit' view (& similia).
3600 # Parameters are a commit hash reference, followed by the list of people
3601 # to output information for. If the list is empty it defalts to both
3602 # author and committer.
3603 sub git_print_authorship_rows {
3604         my $co = shift;
3605         # too bad we can't use @people = @_ || ('author', 'committer')
3606         my @people = @_;
3607         @people = ('author', 'committer') unless @people;
3608         foreach my $who (@people) {
3609                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3610                 print "<tr><td>$who</td><td>" .
3611                       format_search_author($co->{"${who}_name"}, $who,
3612                                esc_html($co->{"${who}_name"})) . " " .
3613                       format_search_author($co->{"${who}_email"}, $who,
3614                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3615                       "</td><td rowspan=\"2\">" .
3616                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3617                       "</td></tr>\n" .
3618                       "<tr>" .
3619                       "<td></td><td> $wd{'rfc2822'}";
3620                 print_local_time(%wd);
3621                 print "</td>" .
3622                       "</tr>\n";
3623         }
3624 }
3625
3626 sub git_print_page_path {
3627         my $name = shift;
3628         my $type = shift;
3629         my $hb = shift;
3630
3631
3632         print "<div class=\"page_path\">";
3633         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3634                       -title => 'tree root'}, to_utf8("[$project]"));
3635         print " / ";
3636         if (defined $name) {
3637                 my @dirname = split '/', $name;
3638                 my $basename = pop @dirname;
3639                 my $fullname = '';
3640
3641                 foreach my $dir (@dirname) {
3642                         $fullname .= ($fullname ? '/' : '') . $dir;
3643                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3644                                                      hash_base=>$hb),
3645                                       -title => $fullname}, esc_path($dir));
3646                         print " / ";
3647                 }
3648                 if (defined $type && $type eq 'blob') {
3649                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3650                                                      hash_base=>$hb),
3651                                       -title => $name}, esc_path($basename));
3652                 } elsif (defined $type && $type eq 'tree') {
3653                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3654                                                      hash_base=>$hb),
3655                                       -title => $name}, esc_path($basename));
3656                         print " / ";
3657                 } else {
3658                         print esc_path($basename);
3659                 }
3660         }
3661         print "<br/></div>\n";
3662 }
3663
3664 sub git_print_log {
3665         my $log = shift;
3666         my %opts = @_;
3667
3668         if ($opts{'-remove_title'}) {
3669                 # remove title, i.e. first line of log
3670                 shift @$log;
3671         }
3672         # remove leading empty lines
3673         while (defined $log->[0] && $log->[0] eq "") {
3674                 shift @$log;
3675         }
3676
3677         # print log
3678         my $signoff = 0;
3679         my $empty = 0;
3680         foreach my $line (@$log) {
3681                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3682                         $signoff = 1;
3683                         $empty = 0;
3684                         if (! $opts{'-remove_signoff'}) {
3685                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3686                                 next;
3687                         } else {
3688                                 # remove signoff lines
3689                                 next;
3690                         }
3691                 } else {
3692                         $signoff = 0;
3693                 }
3694
3695                 # print only one empty line
3696                 # do not print empty line after signoff
3697                 if ($line eq "") {
3698                         next if ($empty || $signoff);
3699                         $empty = 1;
3700                 } else {
3701                         $empty = 0;
3702                 }
3703
3704                 print format_log_line_html($line) . "<br/>\n";
3705         }
3706
3707         if ($opts{'-final_empty_line'}) {
3708                 # end with single empty line
3709                 print "<br/>\n" unless $empty;
3710         }
3711 }
3712
3713 # return link target (what link points to)
3714 sub git_get_link_target {
3715         my $hash = shift;
3716         my $link_target;
3717
3718         # read link
3719         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3720                 or return;
3721         {
3722                 local $/ = undef;
3723                 $link_target = <$fd>;
3724         }
3725         close $fd
3726                 or return;
3727
3728         return $link_target;
3729 }
3730
3731 # given link target, and the directory (basedir) the link is in,
3732 # return target of link relative to top directory (top tree);
3733 # return undef if it is not possible (including absolute links).
3734 sub normalize_link_target {
3735         my ($link_target, $basedir) = @_;
3736
3737         # absolute symlinks (beginning with '/') cannot be normalized
3738         return if (substr($link_target, 0, 1) eq '/');
3739
3740         # normalize link target to path from top (root) tree (dir)
3741         my $path;
3742         if ($basedir) {
3743                 $path = $basedir . '/' . $link_target;
3744         } else {
3745                 # we are in top (root) tree (dir)
3746                 $path = $link_target;
3747         }
3748
3749         # remove //, /./, and /../
3750         my @path_parts;
3751         foreach my $part (split('/', $path)) {
3752                 # discard '.' and ''
3753                 next if (!$part || $part eq '.');
3754                 # handle '..'
3755                 if ($part eq '..') {
3756                         if (@path_parts) {
3757                                 pop @path_parts;
3758                         } else {
3759                                 # link leads outside repository (outside top dir)
3760                                 return;
3761                         }
3762                 } else {
3763                         push @path_parts, $part;
3764                 }
3765         }
3766         $path = join('/', @path_parts);
3767
3768         return $path;
3769 }
3770
3771 # print tree entry (row of git_tree), but without encompassing <tr> element
3772 sub git_print_tree_entry {
3773         my ($t, $basedir, $hash_base, $have_blame) = @_;
3774
3775         my %base_key = ();
3776         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3777
3778         # The format of a table row is: mode list link.  Where mode is
3779         # the mode of the entry, list is the name of the entry, an href,
3780         # and link is the action links of the entry.
3781
3782         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3783         if (exists $t->{'size'}) {
3784                 print "<td class=\"size\">$t->{'size'}</td>\n";
3785         }
3786         if ($t->{'type'} eq "blob") {
3787                 print "<td class=\"list\">" .
3788                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3789                                                file_name=>"$basedir$t->{'name'}", %base_key),
3790                                 -class => "list"}, esc_path($t->{'name'}));
3791                 if (S_ISLNK(oct $t->{'mode'})) {
3792                         my $link_target = git_get_link_target($t->{'hash'});
3793                         if ($link_target) {
3794                                 my $norm_target = normalize_link_target($link_target, $basedir);
3795                                 if (defined $norm_target) {
3796                                         print " -> " .
3797                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3798                                                                      file_name=>$norm_target),
3799                                                        -title => $norm_target}, esc_path($link_target));
3800                                 } else {
3801                                         print " -> " . esc_path($link_target);
3802                                 }
3803                         }
3804                 }
3805                 print "</td>\n";
3806                 print "<td class=\"link\">";
3807                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3808                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3809                               "blob");
3810                 if ($have_blame) {
3811                         print " | " .
3812                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3813                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3814                                       "blame");
3815                 }
3816                 if (defined $hash_base) {
3817                         print " | " .
3818                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3819                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3820                                       "history");
3821                 }
3822                 print " | " .
3823                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3824                                                file_name=>"$basedir$t->{'name'}")},
3825                                 "raw");
3826                 print "</td>\n";
3827
3828         } elsif ($t->{'type'} eq "tree") {
3829                 print "<td class=\"list\">";
3830                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3831                                              file_name=>"$basedir$t->{'name'}",
3832                                              %base_key)},
3833                               esc_path($t->{'name'}));
3834                 print "</td>\n";
3835                 print "<td class=\"link\">";
3836                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3837                                              file_name=>"$basedir$t->{'name'}",
3838                                              %base_key)},
3839                               "tree");
3840                 if (defined $hash_base) {
3841                         print " | " .
3842                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3843                                                      file_name=>"$basedir$t->{'name'}")},
3844                                       "history");
3845                 }
3846                 print "</td>\n";
3847         } else {
3848                 # unknown object: we can only present history for it
3849                 # (this includes 'commit' object, i.e. submodule support)
3850                 print "<td class=\"list\">" .
3851                       esc_path($t->{'name'}) .
3852                       "</td>\n";
3853                 print "<td class=\"link\">";
3854                 if (defined $hash_base) {
3855                         print $cgi->a({-href => href(action=>"history",
3856                                                      hash_base=>$hash_base,
3857                                                      file_name=>"$basedir$t->{'name'}")},
3858                                       "history");
3859                 }
3860                 print "</td>\n";
3861         }
3862 }
3863
3864 ## ......................................................................
3865 ## functions printing large fragments of HTML
3866
3867 # get pre-image filenames for merge (combined) diff
3868 sub fill_from_file_info {
3869         my ($diff, @parents) = @_;
3870
3871         $diff->{'from_file'} = [ ];
3872         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3873         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3874                 if ($diff->{'status'}[$i] eq 'R' ||
3875                     $diff->{'status'}[$i] eq 'C') {
3876                         $diff->{'from_file'}[$i] =
3877                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3878                 }
3879         }
3880
3881         return $diff;
3882 }
3883
3884 # is current raw difftree line of file deletion
3885 sub is_deleted {
3886         my $diffinfo = shift;
3887
3888         return $diffinfo->{'to_id'} eq ('0' x 40);
3889 }
3890
3891 # does patch correspond to [previous] difftree raw line
3892 # $diffinfo  - hashref of parsed raw diff format
3893 # $patchinfo - hashref of parsed patch diff format
3894 #              (the same keys as in $diffinfo)
3895 sub is_patch_split {
3896         my ($diffinfo, $patchinfo) = @_;
3897
3898         return defined $diffinfo && defined $patchinfo
3899                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3900 }
3901
3902
3903 sub git_difftree_body {
3904         my ($difftree, $hash, @parents) = @_;
3905         my ($parent) = $parents[0];
3906         my $have_blame = gitweb_check_feature('blame');
3907         print "<div class=\"list_head\">\n";
3908         if ($#{$difftree} > 10) {
3909                 print(($#{$difftree} + 1) . " files changed:\n");
3910         }
3911         print "</div>\n";
3912
3913         print "<table class=\"" .
3914               (@parents > 1 ? "combined " : "") .
3915               "diff_tree\">\n";
3916
3917         # header only for combined diff in 'commitdiff' view
3918         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3919         if ($has_header) {
3920                 # table header
3921                 print "<thead><tr>\n" .
3922                        "<th></th><th></th>\n"; # filename, patchN link
3923                 for (my $i = 0; $i < @parents; $i++) {
3924                         my $par = $parents[$i];
3925                         print "<th>" .
3926                               $cgi->a({-href => href(action=>"commitdiff",
3927                                                      hash=>$hash, hash_parent=>$par),
3928                                        -title => 'commitdiff to parent number ' .
3929                                                   ($i+1) . ': ' . substr($par,0,7)},
3930                                       $i+1) .
3931                               "&nbsp;</th>\n";
3932                 }
3933                 print "</tr></thead>\n<tbody>\n";
3934         }
3935
3936         my $alternate = 1;
3937         my $patchno = 0;
3938         foreach my $line (@{$difftree}) {
3939                 my $diff = parsed_difftree_line($line);
3940
3941                 if ($alternate) {
3942                         print "<tr class=\"dark\">\n";
3943                 } else {
3944                         print "<tr class=\"light\">\n";
3945                 }
3946                 $alternate ^= 1;
3947
3948                 if (exists $diff->{'nparents'}) { # combined diff
3949
3950                         fill_from_file_info($diff, @parents)
3951                                 unless exists $diff->{'from_file'};
3952
3953                         if (!is_deleted($diff)) {
3954                                 # file exists in the result (child) commit
3955                                 print "<td>" .
3956                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3957                                                              file_name=>$diff->{'to_file'},
3958                                                              hash_base=>$hash),
3959                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3960                                       "</td>\n";
3961                         } else {
3962                                 print "<td>" .
3963                                       esc_path($diff->{'to_file'}) .
3964                                       "</td>\n";
3965                         }
3966
3967                         if ($action eq 'commitdiff') {
3968                                 # link to patch
3969                                 $patchno++;
3970                                 print "<td class=\"link\">" .
3971                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3972                                       " | " .
3973                                       "</td>\n";
3974                         }
3975
3976                         my $has_history = 0;
3977                         my $not_deleted = 0;
3978                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3979                                 my $hash_parent = $parents[$i];
3980                                 my $from_hash = $diff->{'from_id'}[$i];
3981                                 my $from_path = $diff->{'from_file'}[$i];
3982                                 my $status = $diff->{'status'}[$i];
3983
3984                                 $has_history ||= ($status ne 'A');
3985                                 $not_deleted ||= ($status ne 'D');
3986
3987                                 if ($status eq 'A') {
3988                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3989                                 } elsif ($status eq 'D') {
3990                                         print "<td class=\"link\">" .
3991                                               $cgi->a({-href => href(action=>"blob",
3992                                                                      hash_base=>$hash,
3993                                                                      hash=>$from_hash,
3994                                                                      file_name=>$from_path)},
3995                                                       "blob" . ($i+1)) .
3996                                               " | </td>\n";
3997                                 } else {
3998                                         if ($diff->{'to_id'} eq $from_hash) {
3999                                                 print "<td class=\"link nochange\">";
4000                                         } else {
4001                                                 print "<td class=\"link\">";
4002                                         }
4003                                         print $cgi->a({-href => href(action=>"blobdiff",
4004                                                                      hash=>$diff->{'to_id'},
4005                                                                      hash_parent=>$from_hash,
4006                                                                      hash_base=>$hash,
4007                                                                      hash_parent_base=>$hash_parent,
4008                                                                      file_name=>$diff->{'to_file'},
4009                                                                      file_parent=>$from_path)},
4010                                                       "diff" . ($i+1)) .
4011                                               " | </td>\n";
4012                                 }
4013                         }
4014
4015                         print "<td class=\"link\">";
4016                         if ($not_deleted) {
4017                                 print $cgi->a({-href => href(action=>"blob",
4018                                                              hash=>$diff->{'to_id'},
4019                                                              file_name=>$diff->{'to_file'},
4020                                                              hash_base=>$hash)},
4021                                               "blob");
4022                                 print " | " if ($has_history);
4023                         }
4024                         if ($has_history) {
4025                                 print $cgi->a({-href => href(action=>"history",
4026                                                              file_name=>$diff->{'to_file'},
4027                                                              hash_base=>$hash)},
4028                                               "history");
4029                         }
4030                         print "</td>\n";
4031
4032                         print "</tr>\n";
4033                         next; # instead of 'else' clause, to avoid extra indent
4034                 }
4035                 # else ordinary diff
4036
4037                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4038                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4039                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4040                         $to_mode_oct = oct $diff->{'to_mode'};
4041                         if (S_ISREG($to_mode_oct)) { # only for regular file
4042                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4043                         }
4044                         $to_file_type = file_type($diff->{'to_mode'});
4045                 }
4046                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4047                         $from_mode_oct = oct $diff->{'from_mode'};
4048                         if (S_ISREG($to_mode_oct)) { # only for regular file
4049                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4050                         }
4051                         $from_file_type = file_type($diff->{'from_mode'});
4052                 }
4053
4054                 if ($diff->{'status'} eq "A") { # created
4055                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4056                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4057                         $mode_chng   .= "]</span>";
4058                         print "<td>";
4059                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4060                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4061                                       -class => "list"}, esc_path($diff->{'file'}));
4062                         print "</td>\n";
4063                         print "<td>$mode_chng</td>\n";
4064                         print "<td class=\"link\">";
4065                         if ($action eq 'commitdiff') {
4066                                 # link to patch
4067                                 $patchno++;
4068                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4069                                 print " | ";
4070                         }
4071                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4072                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4073                                       "blob");
4074                         print "</td>\n";
4075
4076                 } elsif ($diff->{'status'} eq "D") { # deleted
4077                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4078                         print "<td>";
4079                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4080                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4081                                        -class => "list"}, esc_path($diff->{'file'}));
4082                         print "</td>\n";
4083                         print "<td>$mode_chng</td>\n";
4084                         print "<td class=\"link\">";
4085                         if ($action eq 'commitdiff') {
4086                                 # link to patch
4087                                 $patchno++;
4088                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4089                                 print " | ";
4090                         }
4091                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4092                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4093                                       "blob") . " | ";
4094                         if ($have_blame) {
4095                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4096                                                              file_name=>$diff->{'file'})},
4097                                               "blame") . " | ";
4098                         }
4099                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4100                                                      file_name=>$diff->{'file'})},
4101                                       "history");
4102                         print "</td>\n";
4103
4104                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4105                         my $mode_chnge = "";
4106                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4107                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4108                                 if ($from_file_type ne $to_file_type) {
4109                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4110                                 }
4111                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4112                                         if ($from_mode_str && $to_mode_str) {
4113                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4114                                         } elsif ($to_mode_str) {
4115                                                 $mode_chnge .= " mode: $to_mode_str";
4116                                         }
4117                                 }
4118                                 $mode_chnge .= "]</span>\n";
4119                         }
4120                         print "<td>";
4121                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4122                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4123                                       -class => "list"}, esc_path($diff->{'file'}));
4124                         print "</td>\n";
4125                         print "<td>$mode_chnge</td>\n";
4126                         print "<td class=\"link\">";
4127                         if ($action eq 'commitdiff') {
4128                                 # link to patch
4129                                 $patchno++;
4130                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4131                                       " | ";
4132                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4133                                 # "commit" view and modified file (not onlu mode changed)
4134                                 print $cgi->a({-href => href(action=>"blobdiff",
4135                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4136                                                              hash_base=>$hash, hash_parent_base=>$parent,
4137                                                              file_name=>$diff->{'file'})},
4138                                               "diff") .
4139                                       " | ";
4140                         }
4141                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4142                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4143                                        "blob") . " | ";
4144                         if ($have_blame) {
4145                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4146                                                              file_name=>$diff->{'file'})},
4147                                               "blame") . " | ";
4148                         }
4149                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4150                                                      file_name=>$diff->{'file'})},
4151                                       "history");
4152                         print "</td>\n";
4153
4154                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4155                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4156                         my $nstatus = $status_name{$diff->{'status'}};
4157                         my $mode_chng = "";
4158                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4159                                 # mode also for directories, so we cannot use $to_mode_str
4160                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4161                         }
4162                         print "<td>" .
4163                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4164                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4165                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4166                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4167                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4168                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4169                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4170                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4171                               "<td class=\"link\">";
4172                         if ($action eq 'commitdiff') {
4173                                 # link to patch
4174                                 $patchno++;
4175                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4176                                       " | ";
4177                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4178                                 # "commit" view and modified file (not only pure rename or copy)
4179                                 print $cgi->a({-href => href(action=>"blobdiff",
4180                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4181                                                              hash_base=>$hash, hash_parent_base=>$parent,
4182                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4183                                               "diff") .
4184                                       " | ";
4185                         }
4186                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4187                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4188                                       "blob") . " | ";
4189                         if ($have_blame) {
4190                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4191                                                              file_name=>$diff->{'to_file'})},
4192                                               "blame") . " | ";
4193                         }
4194                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4195                                                     file_name=>$diff->{'to_file'})},
4196                                       "history");
4197                         print "</td>\n";
4198
4199                 } # we should not encounter Unmerged (U) or Unknown (X) status
4200                 print "</tr>\n";
4201         }
4202         print "</tbody>" if $has_header;
4203         print "</table>\n";
4204 }
4205
4206 sub git_patchset_body {
4207         my ($fd, $difftree, $hash, @hash_parents) = @_;
4208         my ($hash_parent) = $hash_parents[0];
4209
4210         my $is_combined = (@hash_parents > 1);
4211         my $patch_idx = 0;
4212         my $patch_number = 0;
4213         my $patch_line;
4214         my $diffinfo;
4215         my $to_name;
4216         my (%from, %to);
4217
4218         print "<div class=\"patchset\">\n";
4219
4220         # skip to first patch
4221         while ($patch_line = <$fd>) {
4222                 chomp $patch_line;
4223
4224                 last if ($patch_line =~ m/^diff /);
4225         }
4226
4227  PATCH:
4228         while ($patch_line) {
4229
4230                 # parse "git diff" header line
4231                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4232                         # $1 is from_name, which we do not use
4233                         $to_name = unquote($2);
4234                         $to_name =~ s!^b/!!;
4235                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4236                         # $1 is 'cc' or 'combined', which we do not use
4237                         $to_name = unquote($2);
4238                 } else {
4239                         $to_name = undef;
4240                 }
4241
4242                 # check if current patch belong to current raw line
4243                 # and parse raw git-diff line if needed
4244                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4245                         # this is continuation of a split patch
4246                         print "<div class=\"patch cont\">\n";
4247                 } else {
4248                         # advance raw git-diff output if needed
4249                         $patch_idx++ if defined $diffinfo;
4250
4251                         # read and prepare patch information
4252                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4253
4254                         # compact combined diff output can have some patches skipped
4255                         # find which patch (using pathname of result) we are at now;
4256                         if ($is_combined) {
4257                                 while ($to_name ne $diffinfo->{'to_file'}) {
4258                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4259                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4260                                               "</div>\n";  # class="patch"
4261
4262                                         $patch_idx++;
4263                                         $patch_number++;
4264
4265                                         last if $patch_idx > $#$difftree;
4266                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4267                                 }
4268                         }
4269
4270                         # modifies %from, %to hashes
4271                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4272
4273                         # this is first patch for raw difftree line with $patch_idx index
4274                         # we index @$difftree array from 0, but number patches from 1
4275                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4276                 }
4277
4278                 # git diff header
4279                 #assert($patch_line =~ m/^diff /) if DEBUG;
4280                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4281                 $patch_number++;
4282                 # print "git diff" header
4283                 print format_git_diff_header_line($patch_line, $diffinfo,
4284                                                   \%from, \%to);
4285
4286                 # print extended diff header
4287                 print "<div class=\"diff extended_header\">\n";
4288         EXTENDED_HEADER:
4289                 while ($patch_line = <$fd>) {
4290                         chomp $patch_line;
4291
4292                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4293
4294                         print format_extended_diff_header_line($patch_line, $diffinfo,
4295                                                                \%from, \%to);
4296                 }
4297                 print "</div>\n"; # class="diff extended_header"
4298
4299                 # from-file/to-file diff header
4300                 if (! $patch_line) {
4301                         print "</div>\n"; # class="patch"
4302                         last PATCH;
4303                 }
4304                 next PATCH if ($patch_line =~ m/^diff /);
4305                 #assert($patch_line =~ m/^---/) if DEBUG;
4306
4307                 my $last_patch_line = $patch_line;
4308                 $patch_line = <$fd>;
4309                 chomp $patch_line;
4310                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4311
4312                 print format_diff_from_to_header($last_patch_line, $patch_line,
4313                                                  $diffinfo, \%from, \%to,
4314                                                  @hash_parents);
4315
4316                 # the patch itself
4317         LINE:
4318                 while ($patch_line = <$fd>) {
4319                         chomp $patch_line;
4320
4321                         next PATCH if ($patch_line =~ m/^diff /);
4322
4323                         print format_diff_line($patch_line, \%from, \%to);
4324                 }
4325
4326         } continue {
4327                 print "</div>\n"; # class="patch"
4328         }
4329
4330         # for compact combined (--cc) format, with chunk and patch simpliciaction
4331         # patchset might be empty, but there might be unprocessed raw lines
4332         for (++$patch_idx if $patch_number > 0;
4333              $patch_idx < @$difftree;
4334              ++$patch_idx) {
4335                 # read and prepare patch information
4336                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4337
4338                 # generate anchor for "patch" links in difftree / whatchanged part
4339                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4340                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4341                       "</div>\n";  # class="patch"
4342
4343                 $patch_number++;
4344         }
4345
4346         if ($patch_number == 0) {
4347                 if (@hash_parents > 1) {
4348                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4349                 } else {
4350                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4351                 }
4352         }
4353
4354         print "</div>\n"; # class="patchset"
4355 }
4356
4357 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4358
4359 # fills project list info (age, description, owner, forks) for each
4360 # project in the list, removing invalid projects from returned list
4361 # NOTE: modifies $projlist, but does not remove entries from it
4362 sub fill_project_list_info {
4363         my ($projlist, $check_forks) = @_;
4364         my @projects;
4365
4366         my $show_ctags = gitweb_check_feature('ctags');
4367  PROJECT:
4368         foreach my $pr (@$projlist) {
4369                 my (@activity) = git_get_last_activity($pr->{'path'});
4370                 unless (@activity) {
4371                         next PROJECT;
4372                 }
4373                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4374                 if (!defined $pr->{'descr'}) {
4375                         my $descr = git_get_project_description($pr->{'path'}) || "";
4376                         $descr = to_utf8($descr);
4377                         $pr->{'descr_long'} = $descr;
4378                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4379                 }
4380                 if (!defined $pr->{'owner'}) {
4381                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4382                 }
4383                 if ($check_forks) {
4384                         my $pname = $pr->{'path'};
4385                         if (($pname =~ s/\.git$//) &&
4386                             ($pname !~ /\/$/) &&
4387                             (-d "$projectroot/$pname")) {
4388                                 $pr->{'forks'} = "-d $projectroot/$pname";
4389                         } else {
4390                                 $pr->{'forks'} = 0;
4391                         }
4392                 }
4393                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4394                 push @projects, $pr;
4395         }
4396
4397         return @projects;
4398 }
4399
4400 # print 'sort by' <th> element, generating 'sort by $name' replay link
4401 # if that order is not selected
4402 sub print_sort_th {
4403         print format_sort_th(@_);
4404 }
4405
4406 sub format_sort_th {
4407         my ($name, $order, $header) = @_;
4408         my $sort_th = "";
4409         $header ||= ucfirst($name);
4410
4411         if ($order eq $name) {
4412                 $sort_th .= "<th>$header</th>\n";
4413         } else {
4414                 $sort_th .= "<th>" .
4415                             $cgi->a({-href => href(-replay=>1, order=>$name),
4416                                      -class => "header"}, $header) .
4417                             "</th>\n";
4418         }
4419
4420         return $sort_th;
4421 }
4422
4423 sub git_project_list_body {
4424         # actually uses global variable $project
4425         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4426
4427         my $check_forks = gitweb_check_feature('forks');
4428         my @projects = fill_project_list_info($projlist, $check_forks);
4429
4430         $order ||= $default_projects_order;
4431         $from = 0 unless defined $from;
4432         $to = $#projects if (!defined $to || $#projects < $to);
4433
4434         my %order_info = (
4435                 project => { key => 'path', type => 'str' },
4436                 descr => { key => 'descr_long', type => 'str' },
4437                 owner => { key => 'owner', type => 'str' },
4438                 age => { key => 'age', type => 'num' }
4439         );
4440         my $oi = $order_info{$order};
4441         if ($oi->{'type'} eq 'str') {
4442                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4443         } else {
4444                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4445         }
4446
4447         my $show_ctags = gitweb_check_feature('ctags');
4448         if ($show_ctags) {
4449                 my %ctags;
4450                 foreach my $p (@projects) {
4451                         foreach my $ct (keys %{$p->{'ctags'}}) {
4452                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4453                         }
4454                 }
4455                 my $cloud = git_populate_project_tagcloud(\%ctags);
4456                 print git_show_project_tagcloud($cloud, 64);
4457         }
4458
4459         print "<table class=\"project_list\">\n";
4460         unless ($no_header) {
4461                 print "<tr>\n";
4462                 if ($check_forks) {
4463                         print "<th></th>\n";
4464                 }
4465                 print_sort_th('project', $order, 'Project');
4466                 print_sort_th('descr', $order, 'Description');
4467                 print_sort_th('owner', $order, 'Owner');
4468                 print_sort_th('age', $order, 'Last Change');
4469                 print "<th></th>\n" . # for links
4470                       "</tr>\n";
4471         }
4472         my $alternate = 1;
4473         my $tagfilter = $cgi->param('by_tag');
4474         for (my $i = $from; $i <= $to; $i++) {
4475                 my $pr = $projects[$i];
4476
4477                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4478                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4479                         and not $pr->{'descr_long'} =~ /$searchtext/;
4480                 # Weed out forks or non-matching entries of search
4481                 if ($check_forks) {
4482                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4483                         $forkbase="^$forkbase" if $forkbase;
4484                         next if not $searchtext and not $tagfilter and $show_ctags
4485                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4486                 }
4487
4488                 if ($alternate) {
4489                         print "<tr class=\"dark\">\n";
4490                 } else {
4491                         print "<tr class=\"light\">\n";
4492                 }
4493                 $alternate ^= 1;
4494                 if ($check_forks) {
4495                         print "<td>";
4496                         if ($pr->{'forks'}) {
4497                                 print "<!-- $pr->{'forks'} -->\n";
4498                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4499                         }
4500                         print "</td>\n";
4501                 }
4502                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4503                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4504                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4505                                         -class => "list", -title => $pr->{'descr_long'}},
4506                                         esc_html($pr->{'descr'})) . "</td>\n" .
4507                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4508                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4509                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4510                       "<td class=\"link\">" .
4511                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4512                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4513                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4514                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4515                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4516                       "</td>\n" .
4517                       "</tr>\n";
4518         }
4519         if (defined $extra) {
4520                 print "<tr>\n";
4521                 if ($check_forks) {
4522                         print "<td></td>\n";
4523                 }
4524                 print "<td colspan=\"5\">$extra</td>\n" .
4525                       "</tr>\n";
4526         }
4527         print "</table>\n";
4528 }
4529
4530 sub git_log_body {
4531         # uses global variable $project
4532         my ($commitlist, $from, $to, $refs, $extra) = @_;
4533
4534         $from = 0 unless defined $from;
4535         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4536
4537         for (my $i = 0; $i <= $to; $i++) {
4538                 my %co = %{$commitlist->[$i]};
4539                 next if !%co;
4540                 my $commit = $co{'id'};
4541                 my $ref = format_ref_marker($refs, $commit);
4542                 my %ad = parse_date($co{'author_epoch'});
4543                 git_print_header_div('commit',
4544                                "<span class=\"age\">$co{'age_string'}</span>" .
4545                                esc_html($co{'title'}) . $ref,
4546                                $commit);
4547                 print "<div class=\"title_text\">\n" .
4548                       "<div class=\"log_link\">\n" .
4549                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4550                       " | " .
4551                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4552                       " | " .
4553                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4554                       "<br/>\n" .
4555                       "</div>\n";
4556                       git_print_authorship(\%co, -tag => 'span');
4557                       print "<br/>\n</div>\n";
4558
4559                 print "<div class=\"log_body\">\n";
4560                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4561                 print "</div>\n";
4562         }
4563         if ($extra) {
4564                 print "<div class=\"page_nav\">\n";
4565                 print "$extra\n";
4566                 print "</div>\n";
4567         }
4568 }
4569
4570 sub git_shortlog_body {
4571         # uses global variable $project
4572         my ($commitlist, $from, $to, $refs, $extra) = @_;
4573
4574         $from = 0 unless defined $from;
4575         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4576
4577         print "<table class=\"shortlog\">\n";
4578         my $alternate = 1;
4579         for (my $i = $from; $i <= $to; $i++) {
4580                 my %co = %{$commitlist->[$i]};
4581                 my $commit = $co{'id'};
4582                 my $ref = format_ref_marker($refs, $commit);
4583                 if ($alternate) {
4584                         print "<tr class=\"dark\">\n";
4585                 } else {
4586                         print "<tr class=\"light\">\n";
4587                 }
4588                 $alternate ^= 1;
4589                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4590                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4591                       format_author_html('td', \%co, 10) . "<td>";
4592                 print format_subject_html($co{'title'}, $co{'title_short'},
4593                                           href(action=>"commit", hash=>$commit), $ref);
4594                 print "</td>\n" .
4595                       "<td class=\"link\">" .
4596                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4597                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4598                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4599                 my $snapshot_links = format_snapshot_links($commit);
4600                 if (defined $snapshot_links) {
4601                         print " | " . $snapshot_links;
4602                 }
4603                 print "</td>\n" .
4604                       "</tr>\n";
4605         }
4606         if (defined $extra) {
4607                 print "<tr>\n" .
4608                       "<td colspan=\"4\">$extra</td>\n" .
4609                       "</tr>\n";
4610         }
4611         print "</table>\n";
4612 }
4613
4614 sub git_history_body {
4615         # Warning: assumes constant type (blob or tree) during history
4616         my ($commitlist, $from, $to, $refs, $extra,
4617             $file_name, $file_hash, $ftype) = @_;
4618
4619         $from = 0 unless defined $from;
4620         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4621
4622         print "<table class=\"history\">\n";
4623         my $alternate = 1;
4624         for (my $i = $from; $i <= $to; $i++) {
4625                 my %co = %{$commitlist->[$i]};
4626                 if (!%co) {
4627                         next;
4628                 }
4629                 my $commit = $co{'id'};
4630
4631                 my $ref = format_ref_marker($refs, $commit);
4632
4633                 if ($alternate) {
4634                         print "<tr class=\"dark\">\n";
4635                 } else {
4636                         print "<tr class=\"light\">\n";
4637                 }
4638                 $alternate ^= 1;
4639                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4640         # shortlog:   format_author_html('td', \%co, 10)
4641                       format_author_html('td', \%co, 15, 3) . "<td>";
4642                 # originally git_history used chop_str($co{'title'}, 50)
4643                 print format_subject_html($co{'title'}, $co{'title_short'},
4644                                           href(action=>"commit", hash=>$commit), $ref);
4645                 print "</td>\n" .
4646                       "<td class=\"link\">" .
4647                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4648                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4649
4650                 if ($ftype eq 'blob') {
4651                         my $blob_current = $file_hash;
4652                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4653                         if (defined $blob_current && defined $blob_parent &&
4654                                         $blob_current ne $blob_parent) {
4655                                 print " | " .
4656                                         $cgi->a({-href => href(action=>"blobdiff",
4657                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4658                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4659                                                                file_name=>$file_name)},
4660                                                 "diff to current");
4661                         }
4662                 }
4663                 print "</td>\n" .
4664                       "</tr>\n";
4665         }
4666         if (defined $extra) {
4667                 print "<tr>\n" .
4668                       "<td colspan=\"4\">$extra</td>\n" .
4669                       "</tr>\n";
4670         }
4671         print "</table>\n";
4672 }
4673
4674 sub git_tags_body {
4675         # uses global variable $project
4676         my ($taglist, $from, $to, $extra) = @_;
4677         $from = 0 unless defined $from;
4678         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4679
4680         print "<table class=\"tags\">\n";
4681         my $alternate = 1;
4682         for (my $i = $from; $i <= $to; $i++) {
4683                 my $entry = $taglist->[$i];
4684                 my %tag = %$entry;
4685                 my $comment = $tag{'subject'};
4686                 my $comment_short;
4687                 if (defined $comment) {
4688                         $comment_short = chop_str($comment, 30, 5);
4689                 }
4690                 if ($alternate) {
4691                         print "<tr class=\"dark\">\n";
4692                 } else {
4693                         print "<tr class=\"light\">\n";
4694                 }
4695                 $alternate ^= 1;
4696                 if (defined $tag{'age'}) {
4697                         print "<td><i>$tag{'age'}</i></td>\n";
4698                 } else {
4699                         print "<td></td>\n";
4700                 }
4701                 print "<td>" .
4702                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4703                                -class => "list name"}, esc_html($tag{'name'})) .
4704                       "</td>\n" .
4705                       "<td>";
4706                 if (defined $comment) {
4707                         print format_subject_html($comment, $comment_short,
4708                                                   href(action=>"tag", hash=>$tag{'id'}));
4709                 }
4710                 print "</td>\n" .
4711                       "<td class=\"selflink\">";
4712                 if ($tag{'type'} eq "tag") {
4713                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4714                 } else {
4715                         print "&nbsp;";
4716                 }
4717                 print "</td>\n" .
4718                       "<td class=\"link\">" . " | " .
4719                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4720                 if ($tag{'reftype'} eq "commit") {
4721                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4722                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4723                 } elsif ($tag{'reftype'} eq "blob") {
4724                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4725                 }
4726                 print "</td>\n" .
4727                       "</tr>";
4728         }
4729         if (defined $extra) {
4730                 print "<tr>\n" .
4731                       "<td colspan=\"5\">$extra</td>\n" .
4732                       "</tr>\n";
4733         }
4734         print "</table>\n";
4735 }
4736
4737 sub git_heads_body {
4738         # uses global variable $project
4739         my ($headlist, $head, $from, $to, $extra) = @_;
4740         $from = 0 unless defined $from;
4741         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4742
4743         print "<table class=\"heads\">\n";
4744         my $alternate = 1;
4745         for (my $i = $from; $i <= $to; $i++) {
4746                 my $entry = $headlist->[$i];
4747                 my %ref = %$entry;
4748                 my $curr = $ref{'id'} eq $head;
4749                 if ($alternate) {
4750                         print "<tr class=\"dark\">\n";
4751                 } else {
4752                         print "<tr class=\"light\">\n";
4753                 }
4754                 $alternate ^= 1;
4755                 print "<td><i>$ref{'age'}</i></td>\n" .
4756                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4757                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4758                                -class => "list name"},esc_html($ref{'name'})) .
4759                       "</td>\n" .
4760                       "<td class=\"link\">" .
4761                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4762                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4763                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4764                       "</td>\n" .
4765                       "</tr>";
4766         }
4767         if (defined $extra) {
4768                 print "<tr>\n" .
4769                       "<td colspan=\"3\">$extra</td>\n" .
4770                       "</tr>\n";
4771         }
4772         print "</table>\n";
4773 }
4774
4775 sub git_search_grep_body {
4776         my ($commitlist, $from, $to, $extra) = @_;
4777         $from = 0 unless defined $from;
4778         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4779
4780         print "<table class=\"commit_search\">\n";
4781         my $alternate = 1;
4782         for (my $i = $from; $i <= $to; $i++) {
4783                 my %co = %{$commitlist->[$i]};
4784                 if (!%co) {
4785                         next;
4786                 }
4787                 my $commit = $co{'id'};
4788                 if ($alternate) {
4789                         print "<tr class=\"dark\">\n";
4790                 } else {
4791                         print "<tr class=\"light\">\n";
4792                 }
4793                 $alternate ^= 1;
4794                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4795                       format_author_html('td', \%co, 15, 5) .
4796                       "<td>" .
4797                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4798                                -class => "list subject"},
4799                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4800                 my $comment = $co{'comment'};
4801                 foreach my $line (@$comment) {
4802                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4803                                 my ($lead, $match, $trail) = ($1, $2, $3);
4804                                 $match = chop_str($match, 70, 5, 'center');
4805                                 my $contextlen = int((80 - length($match))/2);
4806                                 $contextlen = 30 if ($contextlen > 30);
4807                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4808                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4809
4810                                 $lead  = esc_html($lead);
4811                                 $match = esc_html($match);
4812                                 $trail = esc_html($trail);
4813
4814                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4815                         }
4816                 }
4817                 print "</td>\n" .
4818                       "<td class=\"link\">" .
4819                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4820                       " | " .
4821                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4822                       " | " .
4823                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4824                 print "</td>\n" .
4825                       "</tr>\n";
4826         }
4827         if (defined $extra) {
4828                 print "<tr>\n" .
4829                       "<td colspan=\"3\">$extra</td>\n" .
4830                       "</tr>\n";
4831         }
4832         print "</table>\n";
4833 }
4834
4835 ## ======================================================================
4836 ## ======================================================================
4837 ## actions
4838
4839 sub git_project_list {
4840         my $order = $input_params{'order'};
4841         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4842                 die_error(400, "Unknown order parameter");
4843         }
4844
4845         my @list = git_get_projects_list();
4846         if (!@list) {
4847                 die_error(404, "No projects found");
4848         }
4849
4850         git_header_html();
4851         if (defined $home_text && -f $home_text) {
4852                 print "<div class=\"index_include\">\n";
4853                 insert_file($home_text);
4854                 print "</div>\n";
4855         }
4856         print $cgi->startform(-method => "get") .
4857               "<p class=\"projsearch\">Search:\n" .
4858               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4859               "</p>" .
4860               $cgi->end_form() . "\n";
4861         git_project_list_body(\@list, $order);
4862         git_footer_html();
4863 }
4864
4865 sub git_forks {
4866         my $order = $input_params{'order'};
4867         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4868                 die_error(400, "Unknown order parameter");
4869         }
4870
4871         my @list = git_get_projects_list($project);
4872         if (!@list) {
4873                 die_error(404, "No forks found");
4874         }
4875
4876         git_header_html();
4877         git_print_page_nav('','');
4878         git_print_header_div('summary', "$project forks");
4879         git_project_list_body(\@list, $order);
4880         git_footer_html();
4881 }
4882
4883 sub git_project_index {
4884         my @projects = git_get_projects_list($project);
4885
4886         print $cgi->header(
4887                 -type => 'text/plain',
4888                 -charset => 'utf-8',
4889                 -content_disposition => 'inline; filename="index.aux"');
4890
4891         foreach my $pr (@projects) {
4892                 if (!exists $pr->{'owner'}) {
4893                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4894                 }
4895
4896                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4897                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4898                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4899                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4900                 $path  =~ s/ /\+/g;
4901                 $owner =~ s/ /\+/g;
4902
4903                 print "$path $owner\n";
4904         }
4905 }
4906
4907 sub git_summary {
4908         my $descr = git_get_project_description($project) || "none";
4909         my %co = parse_commit("HEAD");
4910         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4911         my $head = $co{'id'};
4912
4913         my $owner = git_get_project_owner($project);
4914
4915         my $refs = git_get_references();
4916         # These get_*_list functions return one more to allow us to see if
4917         # there are more ...
4918         my @taglist  = git_get_tags_list(16);
4919         my @headlist = git_get_heads_list(16);
4920         my @forklist;
4921         my $check_forks = gitweb_check_feature('forks');
4922
4923         if ($check_forks) {
4924                 @forklist = git_get_projects_list($project);
4925         }
4926
4927         git_header_html();
4928         git_print_page_nav('summary','', $head);
4929
4930         print "<div class=\"title\">&nbsp;</div>\n";
4931         print "<table class=\"projects_list\">\n" .
4932               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4933               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4934         if (defined $cd{'rfc2822'}) {
4935                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4936         }
4937
4938         # use per project git URL list in $projectroot/$project/cloneurl
4939         # or make project git URL from git base URL and project name
4940         my $url_tag = "URL";
4941         my @url_list = git_get_project_url_list($project);
4942         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4943         foreach my $git_url (@url_list) {
4944                 next unless $git_url;
4945                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4946                 $url_tag = "";
4947         }
4948
4949         # Tag cloud
4950         my $show_ctags = gitweb_check_feature('ctags');
4951         if ($show_ctags) {
4952                 my $ctags = git_get_project_ctags($project);
4953                 my $cloud = git_populate_project_tagcloud($ctags);
4954                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4955                 print "</td>\n<td>" unless %$ctags;
4956                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4957                 print "</td>\n<td>" if %$ctags;
4958                 print git_show_project_tagcloud($cloud, 48);
4959                 print "</td></tr>";
4960         }
4961
4962         print "</table>\n";
4963
4964         # If XSS prevention is on, we don't include README.html.
4965         # TODO: Allow a readme in some safe format.
4966         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4967                 print "<div class=\"title\">readme</div>\n" .
4968                       "<div class=\"readme\">\n";
4969                 insert_file("$projectroot/$project/README.html");
4970                 print "\n</div>\n"; # class="readme"
4971         }
4972
4973         # we need to request one more than 16 (0..15) to check if
4974         # those 16 are all
4975         my @commitlist = $head ? parse_commits($head, 17) : ();
4976         if (@commitlist) {
4977                 git_print_header_div('shortlog');
4978                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4979                                   $#commitlist <=  15 ? undef :
4980                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4981         }
4982
4983         if (@taglist) {
4984                 git_print_header_div('tags');
4985                 git_tags_body(\@taglist, 0, 15,
4986                               $#taglist <=  15 ? undef :
4987                               $cgi->a({-href => href(action=>"tags")}, "..."));
4988         }
4989
4990         if (@headlist) {
4991                 git_print_header_div('heads');
4992                 git_heads_body(\@headlist, $head, 0, 15,
4993                                $#headlist <= 15 ? undef :
4994                                $cgi->a({-href => href(action=>"heads")}, "..."));
4995         }
4996
4997         if (@forklist) {
4998                 git_print_header_div('forks');
4999                 git_project_list_body(\@forklist, 'age', 0, 15,
5000                                       $#forklist <= 15 ? undef :
5001                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5002                                       'no_header');
5003         }
5004
5005         git_footer_html();
5006 }
5007
5008 sub git_tag {
5009         my $head = git_get_head_hash($project);
5010         git_header_html();
5011         git_print_page_nav('','', $head,undef,$head);
5012         my %tag = parse_tag($hash);
5013
5014         if (! %tag) {
5015                 die_error(404, "Unknown tag object");
5016         }
5017
5018         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5019         print "<div class=\"title_text\">\n" .
5020               "<table class=\"object_header\">\n" .
5021               "<tr>\n" .
5022               "<td>object</td>\n" .
5023               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5024                                $tag{'object'}) . "</td>\n" .
5025               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5026                                               $tag{'type'}) . "</td>\n" .
5027               "</tr>\n";
5028         if (defined($tag{'author'})) {
5029                 git_print_authorship_rows(\%tag, 'author');
5030         }
5031         print "</table>\n\n" .
5032               "</div>\n";
5033         print "<div class=\"page_body\">";
5034         my $comment = $tag{'comment'};
5035         foreach my $line (@$comment) {
5036                 chomp $line;
5037                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5038         }
5039         print "</div>\n";
5040         git_footer_html();
5041 }
5042
5043 sub git_blame_common {
5044         my $format = shift || 'porcelain';
5045         if ($format eq 'porcelain' && $cgi->param('js')) {
5046                 $format = 'incremental';
5047                 $action = 'blame_incremental'; # for page title etc
5048         }
5049
5050         # permissions
5051         gitweb_check_feature('blame')
5052                 or die_error(403, "Blame view not allowed");
5053
5054         # error checking
5055         die_error(400, "No file name given") unless $file_name;
5056         $hash_base ||= git_get_head_hash($project);
5057         die_error(404, "Couldn't find base commit") unless $hash_base;
5058         my %co = parse_commit($hash_base)
5059                 or die_error(404, "Commit not found");
5060         my $ftype = "blob";
5061         if (!defined $hash) {
5062                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5063                         or die_error(404, "Error looking up file");
5064         } else {
5065                 $ftype = git_get_type($hash);
5066                 if ($ftype !~ "blob") {
5067                         die_error(400, "Object is not a blob");
5068                 }
5069         }
5070
5071         my $fd;
5072         if ($format eq 'incremental') {
5073                 # get file contents (as base)
5074                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5075                         or die_error(500, "Open git-cat-file failed");
5076         } elsif ($format eq 'data') {
5077                 # run git-blame --incremental
5078                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5079                         $hash_base, "--", $file_name
5080                         or die_error(500, "Open git-blame --incremental failed");
5081         } else {
5082                 # run git-blame --porcelain
5083                 open $fd, "-|", git_cmd(), "blame", '-p',
5084                         $hash_base, '--', $file_name
5085                         or die_error(500, "Open git-blame --porcelain failed");
5086         }
5087
5088         # incremental blame data returns early
5089         if ($format eq 'data') {
5090                 print $cgi->header(
5091                         -type=>"text/plain", -charset => "utf-8",
5092                         -status=> "200 OK");
5093                 local $| = 1; # output autoflush
5094                 print while <$fd>;
5095                 close $fd
5096                         or print "ERROR $!\n";
5097
5098                 print 'END';
5099                 if (defined $t0 && gitweb_check_feature('timed')) {
5100                         print ' '.
5101                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5102                               ' '.$number_of_git_cmds;
5103                 }
5104                 print "\n";
5105
5106                 return;
5107         }
5108
5109         # page header
5110         git_header_html();
5111         my $formats_nav =
5112                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5113                         "blob") .
5114                 " | ";
5115         if ($format eq 'incremental') {
5116                 $formats_nav .=
5117                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5118                                 "blame") . " (non-incremental)";
5119         } else {
5120                 $formats_nav .=
5121                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5122                                 "blame") . " (incremental)";
5123         }
5124         $formats_nav .=
5125                 " | " .
5126                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5127                         "history") .
5128                 " | " .
5129                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5130                         "HEAD");
5131         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5132         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5133         git_print_page_path($file_name, $ftype, $hash_base);
5134
5135         # page body
5136         if ($format eq 'incremental') {
5137                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5138                       "This page requires JavaScript to run.\n Use ".
5139                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5140                               'this page').
5141                       " instead.\n".
5142                       "</b></center></div>\n</noscript>\n";
5143
5144                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5145         }
5146
5147         print qq!<div class="page_body">\n!;
5148         print qq!<div id="progress_info">... / ...</div>\n!
5149                 if ($format eq 'incremental');
5150         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5151               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5152               qq!<thead>\n!.
5153               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5154               qq!</thead>\n!.
5155               qq!<tbody>\n!;
5156
5157         my @rev_color = qw(light dark);
5158         my $num_colors = scalar(@rev_color);
5159         my $current_color = 0;
5160
5161         if ($format eq 'incremental') {
5162                 my $color_class = $rev_color[$current_color];
5163
5164                 #contents of a file
5165                 my $linenr = 0;
5166         LINE:
5167                 while (my $line = <$fd>) {
5168                         chomp $line;
5169                         $linenr++;
5170
5171                         print qq!<tr id="l$linenr" class="$color_class">!.
5172                               qq!<td class="sha1"><a href=""> </a></td>!.
5173                               qq!<td class="linenr">!.
5174                               qq!<a class="linenr" href="">$linenr</a></td>!;
5175                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5176                         print qq!</tr>\n!;
5177                 }
5178
5179         } else { # porcelain, i.e. ordinary blame
5180                 my %metainfo = (); # saves information about commits
5181
5182                 # blame data
5183         LINE:
5184                 while (my $line = <$fd>) {
5185                         chomp $line;
5186                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5187                         # no <lines in group> for subsequent lines in group of lines
5188                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5189                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5190                         if (!exists $metainfo{$full_rev}) {
5191                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5192                         }
5193                         my $meta = $metainfo{$full_rev};
5194                         my $data;
5195                         while ($data = <$fd>) {
5196                                 chomp $data;
5197                                 last if ($data =~ s/^\t//); # contents of line
5198                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5199                                         $meta->{$1} = $2 unless exists $meta->{$1};
5200                                 }
5201                                 if ($data =~ /^previous /) {
5202                                         $meta->{'nprevious'}++;
5203                                 }
5204                         }
5205                         my $short_rev = substr($full_rev, 0, 8);
5206                         my $author = $meta->{'author'};
5207                         my %date =
5208                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5209                         my $date = $date{'iso-tz'};
5210                         if ($group_size) {
5211                                 $current_color = ($current_color + 1) % $num_colors;
5212                         }
5213                         my $tr_class = $rev_color[$current_color];
5214                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5215                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5216                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5217                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5218                         if ($group_size) {
5219                                 print "<td class=\"sha1\"";
5220                                 print " title=\"". esc_html($author) . ", $date\"";
5221                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5222                                 print ">";
5223                                 print $cgi->a({-href => href(action=>"commit",
5224                                                              hash=>$full_rev,
5225                                                              file_name=>$file_name)},
5226                                               esc_html($short_rev));
5227                                 if ($group_size >= 2) {
5228                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5229                                         if (@author_initials) {
5230                                                 print "<br />" .
5231                                                       esc_html(join('', @author_initials));
5232                                                 #           or join('.', ...)
5233                                         }
5234                                 }
5235                                 print "</td>\n";
5236                         }
5237                         # 'previous' <sha1 of parent commit> <filename at commit>
5238                         if (exists $meta->{'previous'} &&
5239                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5240                                 $meta->{'parent'} = $1;
5241                                 $meta->{'file_parent'} = unquote($2);
5242                         }
5243                         my $linenr_commit =
5244                                 exists($meta->{'parent'}) ?
5245                                 $meta->{'parent'} : $full_rev;
5246                         my $linenr_filename =
5247                                 exists($meta->{'file_parent'}) ?
5248                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5249                         my $blamed = href(action => 'blame',
5250                                           file_name => $linenr_filename,
5251                                           hash_base => $linenr_commit);
5252                         print "<td class=\"linenr\">";
5253                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5254                                         -class => "linenr" },
5255                                       esc_html($lineno));
5256                         print "</td>";
5257                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5258                         print "</tr>\n";
5259                 } # end while
5260
5261         }
5262
5263         # footer
5264         print "</tbody>\n".
5265               "</table>\n"; # class="blame"
5266         print "</div>\n";   # class="blame_body"
5267         close $fd
5268                 or print "Reading blob failed\n";
5269
5270         git_footer_html();
5271 }
5272
5273 sub git_blame {
5274         git_blame_common();
5275 }
5276
5277 sub git_blame_incremental {
5278         git_blame_common('incremental');
5279 }
5280
5281 sub git_blame_data {
5282         git_blame_common('data');
5283 }
5284
5285 sub git_tags {
5286         my $head = git_get_head_hash($project);
5287         git_header_html();
5288         git_print_page_nav('','', $head,undef,$head);
5289         git_print_header_div('summary', $project);
5290
5291         my @tagslist = git_get_tags_list();
5292         if (@tagslist) {
5293                 git_tags_body(\@tagslist);
5294         }
5295         git_footer_html();
5296 }
5297
5298 sub git_heads {
5299         my $head = git_get_head_hash($project);
5300         git_header_html();
5301         git_print_page_nav('','', $head,undef,$head);
5302         git_print_header_div('summary', $project);
5303
5304         my @headslist = git_get_heads_list();
5305         if (@headslist) {
5306                 git_heads_body(\@headslist, $head);
5307         }
5308         git_footer_html();
5309 }
5310
5311 sub git_blob_plain {
5312         my $type = shift;
5313         my $expires;
5314
5315         if (!defined $hash) {
5316                 if (defined $file_name) {
5317                         my $base = $hash_base || git_get_head_hash($project);
5318                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5319                                 or die_error(404, "Cannot find file");
5320                 } else {
5321                         die_error(400, "No file name defined");
5322                 }
5323         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5324                 # blobs defined by non-textual hash id's can be cached
5325                 $expires = "+1d";
5326         }
5327
5328         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5329                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5330
5331         # content-type (can include charset)
5332         $type = blob_contenttype($fd, $file_name, $type);
5333
5334         # "save as" filename, even when no $file_name is given
5335         my $save_as = "$hash";
5336         if (defined $file_name) {
5337                 $save_as = $file_name;
5338         } elsif ($type =~ m/^text\//) {
5339                 $save_as .= '.txt';
5340         }
5341
5342         # With XSS prevention on, blobs of all types except a few known safe
5343         # ones are served with "Content-Disposition: attachment" to make sure
5344         # they don't run in our security domain.  For certain image types,
5345         # blob view writes an <img> tag referring to blob_plain view, and we
5346         # want to be sure not to break that by serving the image as an
5347         # attachment (though Firefox 3 doesn't seem to care).
5348         my $sandbox = $prevent_xss &&
5349                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5350
5351         print $cgi->header(
5352                 -type => $type,
5353                 -expires => $expires,
5354                 -content_disposition =>
5355                         ($sandbox ? 'attachment' : 'inline')
5356                         . '; filename="' . $save_as . '"');
5357         local $/ = undef;
5358         binmode STDOUT, ':raw';
5359         print <$fd>;
5360         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5361         close $fd;
5362 }
5363
5364 sub git_blob {
5365         my $expires;
5366
5367         if (!defined $hash) {
5368                 if (defined $file_name) {
5369                         my $base = $hash_base || git_get_head_hash($project);
5370                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5371                                 or die_error(404, "Cannot find file");
5372                 } else {
5373                         die_error(400, "No file name defined");
5374                 }
5375         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5376                 # blobs defined by non-textual hash id's can be cached
5377                 $expires = "+1d";
5378         }
5379
5380         my $have_blame = gitweb_check_feature('blame');
5381         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5382                 or die_error(500, "Couldn't cat $file_name, $hash");
5383         my $mimetype = blob_mimetype($fd, $file_name);
5384         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5385                 close $fd;
5386                 return git_blob_plain($mimetype);
5387         }
5388         # we can have blame only for text/* mimetype
5389         $have_blame &&= ($mimetype =~ m!^text/!);
5390
5391         git_header_html(undef, $expires);
5392         my $formats_nav = '';
5393         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5394                 if (defined $file_name) {
5395                         if ($have_blame) {
5396                                 $formats_nav .=
5397                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5398                                                 "blame") .
5399                                         " | ";
5400                         }
5401                         $formats_nav .=
5402                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5403                                         "history") .
5404                                 " | " .
5405                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5406                                         "raw") .
5407                                 " | " .
5408                                 $cgi->a({-href => href(action=>"blob",
5409                                                        hash_base=>"HEAD", file_name=>$file_name)},
5410                                         "HEAD");
5411                 } else {
5412                         $formats_nav .=
5413                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5414                                         "raw");
5415                 }
5416                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5417                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5418         } else {
5419                 print "<div class=\"page_nav\">\n" .
5420                       "<br/><br/></div>\n" .
5421                       "<div class=\"title\">$hash</div>\n";
5422         }
5423         git_print_page_path($file_name, "blob", $hash_base);
5424         print "<div class=\"page_body\">\n";
5425         if ($mimetype =~ m!^image/!) {
5426                 print qq!<img type="$mimetype"!;
5427                 if ($file_name) {
5428                         print qq! alt="$file_name" title="$file_name"!;
5429                 }
5430                 print qq! src="! .
5431                       href(action=>"blob_plain", hash=>$hash,
5432                            hash_base=>$hash_base, file_name=>$file_name) .
5433                       qq!" />\n!;
5434         } else {
5435                 my $nr;
5436                 while (my $line = <$fd>) {
5437                         chomp $line;
5438                         $nr++;
5439                         $line = untabify($line);
5440                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5441                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5442                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5443                 }
5444         }
5445         close $fd
5446                 or print "Reading blob failed.\n";
5447         print "</div>";
5448         git_footer_html();
5449 }
5450
5451 sub git_tree {
5452         if (!defined $hash_base) {
5453                 $hash_base = "HEAD";
5454         }
5455         if (!defined $hash) {
5456                 if (defined $file_name) {
5457                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5458                 } else {
5459                         $hash = $hash_base;
5460                 }
5461         }
5462         die_error(404, "No such tree") unless defined($hash);
5463
5464         my $show_sizes = gitweb_check_feature('show-sizes');
5465         my $have_blame = gitweb_check_feature('blame');
5466
5467         my @entries = ();
5468         {
5469                 local $/ = "\0";
5470                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5471                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5472                         or die_error(500, "Open git-ls-tree failed");
5473                 @entries = map { chomp; $_ } <$fd>;
5474                 close $fd
5475                         or die_error(404, "Reading tree failed");
5476         }
5477
5478         my $refs = git_get_references();
5479         my $ref = format_ref_marker($refs, $hash_base);
5480         git_header_html();
5481         my $basedir = '';
5482         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5483                 my @views_nav = ();
5484                 if (defined $file_name) {
5485                         push @views_nav,
5486                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5487                                         "history"),
5488                                 $cgi->a({-href => href(action=>"tree",
5489                                                        hash_base=>"HEAD", file_name=>$file_name)},
5490                                         "HEAD"),
5491                 }
5492                 my $snapshot_links = format_snapshot_links($hash);
5493                 if (defined $snapshot_links) {
5494                         # FIXME: Should be available when we have no hash base as well.
5495                         push @views_nav, $snapshot_links;
5496                 }
5497                 git_print_page_nav('tree','', $hash_base, undef, undef,
5498                                    join(' | ', @views_nav));
5499                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5500         } else {
5501                 undef $hash_base;
5502                 print "<div class=\"page_nav\">\n";
5503                 print "<br/><br/></div>\n";
5504                 print "<div class=\"title\">$hash</div>\n";
5505         }
5506         if (defined $file_name) {
5507                 $basedir = $file_name;
5508                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5509                         $basedir .= '/';
5510                 }
5511                 git_print_page_path($file_name, 'tree', $hash_base);
5512         }
5513         print "<div class=\"page_body\">\n";
5514         print "<table class=\"tree\">\n";
5515         my $alternate = 1;
5516         # '..' (top directory) link if possible
5517         if (defined $hash_base &&
5518             defined $file_name && $file_name =~ m![^/]+$!) {
5519                 if ($alternate) {
5520                         print "<tr class=\"dark\">\n";
5521                 } else {
5522                         print "<tr class=\"light\">\n";
5523                 }
5524                 $alternate ^= 1;
5525
5526                 my $up = $file_name;
5527                 $up =~ s!/?[^/]+$!!;
5528                 undef $up unless $up;
5529                 # based on git_print_tree_entry
5530                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5531                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5532                 print '<td class="list">';
5533                 print $cgi->a({-href => href(action=>"tree",
5534                                              hash_base=>$hash_base,
5535                                              file_name=>$up)},
5536                               "..");
5537                 print "</td>\n";
5538                 print "<td class=\"link\"></td>\n";
5539
5540                 print "</tr>\n";
5541         }
5542         foreach my $line (@entries) {
5543                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5544
5545                 if ($alternate) {
5546                         print "<tr class=\"dark\">\n";
5547                 } else {
5548                         print "<tr class=\"light\">\n";
5549                 }
5550                 $alternate ^= 1;
5551
5552                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5553
5554                 print "</tr>\n";
5555         }
5556         print "</table>\n" .
5557               "</div>";
5558         git_footer_html();
5559 }
5560
5561 sub snapshot_name {
5562         my ($project, $hash) = @_;
5563
5564         # path/to/project.git  -> project
5565         # path/to/project/.git -> project
5566         my $name = to_utf8($project);
5567         $name =~ s,([^/])/*\.git$,$1,;
5568         $name = basename($name);
5569         # sanitize name
5570         $name =~ s/[[:cntrl:]]/?/g;
5571
5572         my $ver = $hash;
5573         if ($hash =~ /^[0-9a-fA-F]+$/) {
5574                 # shorten SHA-1 hash
5575                 my $full_hash = git_get_full_hash($project, $hash);
5576                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5577                         $ver = git_get_short_hash($project, $hash);
5578                 }
5579         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5580                 # tags don't need shortened SHA-1 hash
5581                 $ver = $1;
5582         } else {
5583                 # branches and other need shortened SHA-1 hash
5584                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5585                         $ver = $1;
5586                 }
5587                 $ver .= '-' . git_get_short_hash($project, $hash);
5588         }
5589         # in case of hierarchical branch names
5590         $ver =~ s!/!.!g;
5591
5592         # name = project-version_string
5593         $name = "$name-$ver";
5594
5595         return wantarray ? ($name, $name) : $name;
5596 }
5597
5598 sub git_snapshot {
5599         my $format = $input_params{'snapshot_format'};
5600         if (!@snapshot_fmts) {
5601                 die_error(403, "Snapshots not allowed");
5602         }
5603         # default to first supported snapshot format
5604         $format ||= $snapshot_fmts[0];
5605         if ($format !~ m/^[a-z0-9]+$/) {
5606                 die_error(400, "Invalid snapshot format parameter");
5607         } elsif (!exists($known_snapshot_formats{$format})) {
5608                 die_error(400, "Unknown snapshot format");
5609         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5610                 die_error(403, "Snapshot format not allowed");
5611         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5612                 die_error(403, "Unsupported snapshot format");
5613         }
5614
5615         my $type = git_get_type("$hash^{}");
5616         if (!$type) {
5617                 die_error(404, 'Object does not exist');
5618         }  elsif ($type eq 'blob') {
5619                 die_error(400, 'Object is not a tree-ish');
5620         }
5621
5622         my ($name, $prefix) = snapshot_name($project, $hash);
5623         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5624         my $cmd = quote_command(
5625                 git_cmd(), 'archive',
5626                 "--format=$known_snapshot_formats{$format}{'format'}",
5627                 "--prefix=$prefix/", $hash);
5628         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5629                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5630         }
5631
5632         $filename =~ s/(["\\])/\\$1/g;
5633         print $cgi->header(
5634                 -type => $known_snapshot_formats{$format}{'type'},
5635                 -content_disposition => 'inline; filename="' . $filename . '"',
5636                 -status => '200 OK');
5637
5638         open my $fd, "-|", $cmd
5639                 or die_error(500, "Execute git-archive failed");
5640         binmode STDOUT, ':raw';
5641         print <$fd>;
5642         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5643         close $fd;
5644 }
5645
5646 sub git_log_generic {
5647         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5648
5649         my $head = git_get_head_hash($project);
5650         if (!defined $base) {
5651                 $base = $head;
5652         }
5653         if (!defined $page) {
5654                 $page = 0;
5655         }
5656         my $refs = git_get_references();
5657
5658         my $commit_hash = $base;
5659         if (defined $parent) {
5660                 $commit_hash = "$parent..$base";
5661         }
5662         my @commitlist =
5663                 parse_commits($commit_hash, 101, (100 * $page),
5664                               defined $file_name ? ($file_name, "--full-history") : ());
5665
5666         my $ftype;
5667         if (!defined $file_hash && defined $file_name) {
5668                 # some commits could have deleted file in question,
5669                 # and not have it in tree, but one of them has to have it
5670                 for (my $i = 0; $i < @commitlist; $i++) {
5671                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5672                         last if defined $file_hash;
5673                 }
5674         }
5675         if (defined $file_hash) {
5676                 $ftype = git_get_type($file_hash);
5677         }
5678         if (defined $file_name && !defined $ftype) {
5679                 die_error(500, "Unknown type of object");
5680         }
5681         my %co;
5682         if (defined $file_name) {
5683                 %co = parse_commit($base)
5684                         or die_error(404, "Unknown commit object");
5685         }
5686
5687
5688         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5689         my $next_link = '';
5690         if ($#commitlist >= 100) {
5691                 $next_link =
5692                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5693                                  -accesskey => "n", -title => "Alt-n"}, "next");
5694         }
5695         my $patch_max = gitweb_get_feature('patches');
5696         if ($patch_max && !defined $file_name) {
5697                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5698                         $paging_nav .= " &sdot; " .
5699                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5700                                         "patches");
5701                 }
5702         }
5703
5704         git_header_html();
5705         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5706         if (defined $file_name) {
5707                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5708         } else {
5709                 git_print_header_div('summary', $project)
5710         }
5711         git_print_page_path($file_name, $ftype, $hash_base)
5712                 if (defined $file_name);
5713
5714         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5715                      $file_name, $file_hash, $ftype);
5716
5717         git_footer_html();
5718 }
5719
5720 sub git_log {
5721         git_log_generic('log', \&git_log_body,
5722                         $hash, $hash_parent);
5723 }
5724
5725 sub git_commit {
5726         $hash ||= $hash_base || "HEAD";
5727         my %co = parse_commit($hash)
5728             or die_error(404, "Unknown commit object");
5729
5730         my $parent  = $co{'parent'};
5731         my $parents = $co{'parents'}; # listref
5732
5733         # we need to prepare $formats_nav before any parameter munging
5734         my $formats_nav;
5735         if (!defined $parent) {
5736                 # --root commitdiff
5737                 $formats_nav .= '(initial)';
5738         } elsif (@$parents == 1) {
5739                 # single parent commit
5740                 $formats_nav .=
5741                         '(parent: ' .
5742                         $cgi->a({-href => href(action=>"commit",
5743                                                hash=>$parent)},
5744                                 esc_html(substr($parent, 0, 7))) .
5745                         ')';
5746         } else {
5747                 # merge commit
5748                 $formats_nav .=
5749                         '(merge: ' .
5750                         join(' ', map {
5751                                 $cgi->a({-href => href(action=>"commit",
5752                                                        hash=>$_)},
5753                                         esc_html(substr($_, 0, 7)));
5754                         } @$parents ) .
5755                         ')';
5756         }
5757         if (gitweb_check_feature('patches') && @$parents <= 1) {
5758                 $formats_nav .= " | " .
5759                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5760                                 "patch");
5761         }
5762
5763         if (!defined $parent) {
5764                 $parent = "--root";
5765         }
5766         my @difftree;
5767         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5768                 @diff_opts,
5769                 (@$parents <= 1 ? $parent : '-c'),
5770                 $hash, "--"
5771                 or die_error(500, "Open git-diff-tree failed");
5772         @difftree = map { chomp; $_ } <$fd>;
5773         close $fd or die_error(404, "Reading git-diff-tree failed");
5774
5775         # non-textual hash id's can be cached
5776         my $expires;
5777         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5778                 $expires = "+1d";
5779         }
5780         my $refs = git_get_references();
5781         my $ref = format_ref_marker($refs, $co{'id'});
5782
5783         git_header_html(undef, $expires);
5784         git_print_page_nav('commit', '',
5785                            $hash, $co{'tree'}, $hash,
5786                            $formats_nav);
5787
5788         if (defined $co{'parent'}) {
5789                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5790         } else {
5791                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5792         }
5793         print "<div class=\"title_text\">\n" .
5794               "<table class=\"object_header\">\n";
5795         git_print_authorship_rows(\%co);
5796         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5797         print "<tr>" .
5798               "<td>tree</td>" .
5799               "<td class=\"sha1\">" .
5800               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5801                        class => "list"}, $co{'tree'}) .
5802               "</td>" .
5803               "<td class=\"link\">" .
5804               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5805                       "tree");
5806         my $snapshot_links = format_snapshot_links($hash);
5807         if (defined $snapshot_links) {
5808                 print " | " . $snapshot_links;
5809         }
5810         print "</td>" .
5811               "</tr>\n";
5812
5813         foreach my $par (@$parents) {
5814                 print "<tr>" .
5815                       "<td>parent</td>" .
5816                       "<td class=\"sha1\">" .
5817                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5818                                class => "list"}, $par) .
5819                       "</td>" .
5820                       "<td class=\"link\">" .
5821                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5822                       " | " .
5823                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5824                       "</td>" .
5825                       "</tr>\n";
5826         }
5827         print "</table>".
5828               "</div>\n";
5829
5830         print "<div class=\"page_body\">\n";
5831         git_print_log($co{'comment'});
5832         print "</div>\n";
5833
5834         git_difftree_body(\@difftree, $hash, @$parents);
5835
5836         git_footer_html();
5837 }
5838
5839 sub git_object {
5840         # object is defined by:
5841         # - hash or hash_base alone
5842         # - hash_base and file_name
5843         my $type;
5844
5845         # - hash or hash_base alone
5846         if ($hash || ($hash_base && !defined $file_name)) {
5847                 my $object_id = $hash || $hash_base;
5848
5849                 open my $fd, "-|", quote_command(
5850                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5851                         or die_error(404, "Object does not exist");
5852                 $type = <$fd>;
5853                 chomp $type;
5854                 close $fd
5855                         or die_error(404, "Object does not exist");
5856
5857         # - hash_base and file_name
5858         } elsif ($hash_base && defined $file_name) {
5859                 $file_name =~ s,/+$,,;
5860
5861                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5862                         or die_error(404, "Base object does not exist");
5863
5864                 # here errors should not hapen
5865                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5866                         or die_error(500, "Open git-ls-tree failed");
5867                 my $line = <$fd>;
5868                 close $fd;
5869
5870                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5871                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5872                         die_error(404, "File or directory for given base does not exist");
5873                 }
5874                 $type = $2;
5875                 $hash = $3;
5876         } else {
5877                 die_error(400, "Not enough information to find object");
5878         }
5879
5880         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5881                                           hash=>$hash, hash_base=>$hash_base,
5882                                           file_name=>$file_name),
5883                              -status => '302 Found');
5884 }
5885
5886 sub git_blobdiff {
5887         my $format = shift || 'html';
5888
5889         my $fd;
5890         my @difftree;
5891         my %diffinfo;
5892         my $expires;
5893
5894         # preparing $fd and %diffinfo for git_patchset_body
5895         # new style URI
5896         if (defined $hash_base && defined $hash_parent_base) {
5897                 if (defined $file_name) {
5898                         # read raw output
5899                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5900                                 $hash_parent_base, $hash_base,
5901                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5902                                 or die_error(500, "Open git-diff-tree failed");
5903                         @difftree = map { chomp; $_ } <$fd>;
5904                         close $fd
5905                                 or die_error(404, "Reading git-diff-tree failed");
5906                         @difftree
5907                                 or die_error(404, "Blob diff not found");
5908
5909                 } elsif (defined $hash &&
5910                          $hash =~ /[0-9a-fA-F]{40}/) {
5911                         # try to find filename from $hash
5912
5913                         # read filtered raw output
5914                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5915                                 $hash_parent_base, $hash_base, "--"
5916                                 or die_error(500, "Open git-diff-tree failed");
5917                         @difftree =
5918                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5919                                 # $hash == to_id
5920                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5921                                 map { chomp; $_ } <$fd>;
5922                         close $fd
5923                                 or die_error(404, "Reading git-diff-tree failed");
5924                         @difftree
5925                                 or die_error(404, "Blob diff not found");
5926
5927                 } else {
5928                         die_error(400, "Missing one of the blob diff parameters");
5929                 }
5930
5931                 if (@difftree > 1) {
5932                         die_error(400, "Ambiguous blob diff specification");
5933                 }
5934
5935                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5936                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5937                 $file_name   ||= $diffinfo{'to_file'};
5938
5939                 $hash_parent ||= $diffinfo{'from_id'};
5940                 $hash        ||= $diffinfo{'to_id'};
5941
5942                 # non-textual hash id's can be cached
5943                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5944                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5945                         $expires = '+1d';
5946                 }
5947
5948                 # open patch output
5949                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5950                         '-p', ($format eq 'html' ? "--full-index" : ()),
5951                         $hash_parent_base, $hash_base,
5952                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5953                         or die_error(500, "Open git-diff-tree failed");
5954         }
5955
5956         # old/legacy style URI -- not generated anymore since 1.4.3.
5957         if (!%diffinfo) {
5958                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5959         }
5960
5961         # header
5962         if ($format eq 'html') {
5963                 my $formats_nav =
5964                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5965                                 "raw");
5966                 git_header_html(undef, $expires);
5967                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5968                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5969                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5970                 } else {
5971                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5972                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5973                 }
5974                 if (defined $file_name) {
5975                         git_print_page_path($file_name, "blob", $hash_base);
5976                 } else {
5977                         print "<div class=\"page_path\"></div>\n";
5978                 }
5979
5980         } elsif ($format eq 'plain') {
5981                 print $cgi->header(
5982                         -type => 'text/plain',
5983                         -charset => 'utf-8',
5984                         -expires => $expires,
5985                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5986
5987                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5988
5989         } else {
5990                 die_error(400, "Unknown blobdiff format");
5991         }
5992
5993         # patch
5994         if ($format eq 'html') {
5995                 print "<div class=\"page_body\">\n";
5996
5997                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5998                 close $fd;
5999
6000                 print "</div>\n"; # class="page_body"
6001                 git_footer_html();
6002
6003         } else {
6004                 while (my $line = <$fd>) {
6005                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6006                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6007
6008                         print $line;
6009
6010                         last if $line =~ m!^\+\+\+!;
6011                 }
6012                 local $/ = undef;
6013                 print <$fd>;
6014                 close $fd;
6015         }
6016 }
6017
6018 sub git_blobdiff_plain {
6019         git_blobdiff('plain');
6020 }
6021
6022 sub git_commitdiff {
6023         my %params = @_;
6024         my $format = $params{-format} || 'html';
6025
6026         my ($patch_max) = gitweb_get_feature('patches');
6027         if ($format eq 'patch') {
6028                 die_error(403, "Patch view not allowed") unless $patch_max;
6029         }
6030
6031         $hash ||= $hash_base || "HEAD";
6032         my %co = parse_commit($hash)
6033             or die_error(404, "Unknown commit object");
6034
6035         # choose format for commitdiff for merge
6036         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6037                 $hash_parent = '--cc';
6038         }
6039         # we need to prepare $formats_nav before almost any parameter munging
6040         my $formats_nav;
6041         if ($format eq 'html') {
6042                 $formats_nav =
6043                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6044                                 "raw");
6045                 if ($patch_max && @{$co{'parents'}} <= 1) {
6046                         $formats_nav .= " | " .
6047                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6048                                         "patch");
6049                 }
6050
6051                 if (defined $hash_parent &&
6052                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6053                         # commitdiff with two commits given
6054                         my $hash_parent_short = $hash_parent;
6055                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6056                                 $hash_parent_short = substr($hash_parent, 0, 7);
6057                         }
6058                         $formats_nav .=
6059                                 ' (from';
6060                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6061                                 if ($co{'parents'}[$i] eq $hash_parent) {
6062                                         $formats_nav .= ' parent ' . ($i+1);
6063                                         last;
6064                                 }
6065                         }
6066                         $formats_nav .= ': ' .
6067                                 $cgi->a({-href => href(action=>"commitdiff",
6068                                                        hash=>$hash_parent)},
6069                                         esc_html($hash_parent_short)) .
6070                                 ')';
6071                 } elsif (!$co{'parent'}) {
6072                         # --root commitdiff
6073                         $formats_nav .= ' (initial)';
6074                 } elsif (scalar @{$co{'parents'}} == 1) {
6075                         # single parent commit
6076                         $formats_nav .=
6077                                 ' (parent: ' .
6078                                 $cgi->a({-href => href(action=>"commitdiff",
6079                                                        hash=>$co{'parent'})},
6080                                         esc_html(substr($co{'parent'}, 0, 7))) .
6081                                 ')';
6082                 } else {
6083                         # merge commit
6084                         if ($hash_parent eq '--cc') {
6085                                 $formats_nav .= ' | ' .
6086                                         $cgi->a({-href => href(action=>"commitdiff",
6087                                                                hash=>$hash, hash_parent=>'-c')},
6088                                                 'combined');
6089                         } else { # $hash_parent eq '-c'
6090                                 $formats_nav .= ' | ' .
6091                                         $cgi->a({-href => href(action=>"commitdiff",
6092                                                                hash=>$hash, hash_parent=>'--cc')},
6093                                                 'compact');
6094                         }
6095                         $formats_nav .=
6096                                 ' (merge: ' .
6097                                 join(' ', map {
6098                                         $cgi->a({-href => href(action=>"commitdiff",
6099                                                                hash=>$_)},
6100                                                 esc_html(substr($_, 0, 7)));
6101                                 } @{$co{'parents'}} ) .
6102                                 ')';
6103                 }
6104         }
6105
6106         my $hash_parent_param = $hash_parent;
6107         if (!defined $hash_parent_param) {
6108                 # --cc for multiple parents, --root for parentless
6109                 $hash_parent_param =
6110                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6111         }
6112
6113         # read commitdiff
6114         my $fd;
6115         my @difftree;
6116         if ($format eq 'html') {
6117                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6118                         "--no-commit-id", "--patch-with-raw", "--full-index",
6119                         $hash_parent_param, $hash, "--"
6120                         or die_error(500, "Open git-diff-tree failed");
6121
6122                 while (my $line = <$fd>) {
6123                         chomp $line;
6124                         # empty line ends raw part of diff-tree output
6125                         last unless $line;
6126                         push @difftree, scalar parse_difftree_raw_line($line);
6127                 }
6128
6129         } elsif ($format eq 'plain') {
6130                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6131                         '-p', $hash_parent_param, $hash, "--"
6132                         or die_error(500, "Open git-diff-tree failed");
6133         } elsif ($format eq 'patch') {
6134                 # For commit ranges, we limit the output to the number of
6135                 # patches specified in the 'patches' feature.
6136                 # For single commits, we limit the output to a single patch,
6137                 # diverging from the git-format-patch default.
6138                 my @commit_spec = ();
6139                 if ($hash_parent) {
6140                         if ($patch_max > 0) {
6141                                 push @commit_spec, "-$patch_max";
6142                         }
6143                         push @commit_spec, '-n', "$hash_parent..$hash";
6144                 } else {
6145                         if ($params{-single}) {
6146                                 push @commit_spec, '-1';
6147                         } else {
6148                                 if ($patch_max > 0) {
6149                                         push @commit_spec, "-$patch_max";
6150                                 }
6151                                 push @commit_spec, "-n";
6152                         }
6153                         push @commit_spec, '--root', $hash;
6154                 }
6155                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6156                         '--stdout', @commit_spec
6157                         or die_error(500, "Open git-format-patch failed");
6158         } else {
6159                 die_error(400, "Unknown commitdiff format");
6160         }
6161
6162         # non-textual hash id's can be cached
6163         my $expires;
6164         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6165                 $expires = "+1d";
6166         }
6167
6168         # write commit message
6169         if ($format eq 'html') {
6170                 my $refs = git_get_references();
6171                 my $ref = format_ref_marker($refs, $co{'id'});
6172
6173                 git_header_html(undef, $expires);
6174                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6175                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6176                 print "<div class=\"title_text\">\n" .
6177                       "<table class=\"object_header\">\n";
6178                 git_print_authorship_rows(\%co);
6179                 print "</table>".
6180                       "</div>\n";
6181                 print "<div class=\"page_body\">\n";
6182                 if (@{$co{'comment'}} > 1) {
6183                         print "<div class=\"log\">\n";
6184                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6185                         print "</div>\n"; # class="log"
6186                 }
6187
6188         } elsif ($format eq 'plain') {
6189                 my $refs = git_get_references("tags");
6190                 my $tagname = git_get_rev_name_tags($hash);
6191                 my $filename = basename($project) . "-$hash.patch";
6192
6193                 print $cgi->header(
6194                         -type => 'text/plain',
6195                         -charset => 'utf-8',
6196                         -expires => $expires,
6197                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6198                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6199                 print "From: " . to_utf8($co{'author'}) . "\n";
6200                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6201                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6202
6203                 print "X-Git-Tag: $tagname\n" if $tagname;
6204                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6205
6206                 foreach my $line (@{$co{'comment'}}) {
6207                         print to_utf8($line) . "\n";
6208                 }
6209                 print "---\n\n";
6210         } elsif ($format eq 'patch') {
6211                 my $filename = basename($project) . "-$hash.patch";
6212
6213                 print $cgi->header(
6214                         -type => 'text/plain',
6215                         -charset => 'utf-8',
6216                         -expires => $expires,
6217                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6218         }
6219
6220         # write patch
6221         if ($format eq 'html') {
6222                 my $use_parents = !defined $hash_parent ||
6223                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6224                 git_difftree_body(\@difftree, $hash,
6225                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6226                 print "<br/>\n";
6227
6228                 git_patchset_body($fd, \@difftree, $hash,
6229                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6230                 close $fd;
6231                 print "</div>\n"; # class="page_body"
6232                 git_footer_html();
6233
6234         } elsif ($format eq 'plain') {
6235                 local $/ = undef;
6236                 print <$fd>;
6237                 close $fd
6238                         or print "Reading git-diff-tree failed\n";
6239         } elsif ($format eq 'patch') {
6240                 local $/ = undef;
6241                 print <$fd>;
6242                 close $fd
6243                         or print "Reading git-format-patch failed\n";
6244         }
6245 }
6246
6247 sub git_commitdiff_plain {
6248         git_commitdiff(-format => 'plain');
6249 }
6250
6251 # format-patch-style patches
6252 sub git_patch {
6253         git_commitdiff(-format => 'patch', -single => 1);
6254 }
6255
6256 sub git_patches {
6257         git_commitdiff(-format => 'patch');
6258 }
6259
6260 sub git_history {
6261         git_log_generic('history', \&git_history_body,
6262                         $hash_base, $hash_parent_base,
6263                         $file_name, $hash);
6264 }
6265
6266 sub git_search {
6267         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6268         if (!defined $searchtext) {
6269                 die_error(400, "Text field is empty");
6270         }
6271         if (!defined $hash) {
6272                 $hash = git_get_head_hash($project);
6273         }
6274         my %co = parse_commit($hash);
6275         if (!%co) {
6276                 die_error(404, "Unknown commit object");
6277         }
6278         if (!defined $page) {
6279                 $page = 0;
6280         }
6281
6282         $searchtype ||= 'commit';
6283         if ($searchtype eq 'pickaxe') {
6284                 # pickaxe may take all resources of your box and run for several minutes
6285                 # with every query - so decide by yourself how public you make this feature
6286                 gitweb_check_feature('pickaxe')
6287                     or die_error(403, "Pickaxe is disabled");
6288         }
6289         if ($searchtype eq 'grep') {
6290                 gitweb_check_feature('grep')[0]
6291                     or die_error(403, "Grep is disabled");
6292         }
6293
6294         git_header_html();
6295
6296         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6297                 my $greptype;
6298                 if ($searchtype eq 'commit') {
6299                         $greptype = "--grep=";
6300                 } elsif ($searchtype eq 'author') {
6301                         $greptype = "--author=";
6302                 } elsif ($searchtype eq 'committer') {
6303                         $greptype = "--committer=";
6304                 }
6305                 $greptype .= $searchtext;
6306                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6307                                                $greptype, '--regexp-ignore-case',
6308                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6309
6310                 my $paging_nav = '';
6311                 if ($page > 0) {
6312                         $paging_nav .=
6313                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6314                                                        searchtext=>$searchtext,
6315                                                        searchtype=>$searchtype)},
6316                                         "first");
6317                         $paging_nav .= " &sdot; " .
6318                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6319                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6320                 } else {
6321                         $paging_nav .= "first";
6322                         $paging_nav .= " &sdot; prev";
6323                 }
6324                 my $next_link = '';
6325                 if ($#commitlist >= 100) {
6326                         $next_link =
6327                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6328                                          -accesskey => "n", -title => "Alt-n"}, "next");
6329                         $paging_nav .= " &sdot; $next_link";
6330                 } else {
6331                         $paging_nav .= " &sdot; next";
6332                 }
6333
6334                 if ($#commitlist >= 100) {
6335                 }
6336
6337                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6338                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6339                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6340         }
6341
6342         if ($searchtype eq 'pickaxe') {
6343                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6344                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6345
6346                 print "<table class=\"pickaxe search\">\n";
6347                 my $alternate = 1;
6348                 local $/ = "\n";
6349                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6350                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6351                         ($search_use_regexp ? '--pickaxe-regex' : ());
6352                 undef %co;
6353                 my @files;
6354                 while (my $line = <$fd>) {
6355                         chomp $line;
6356                         next unless $line;
6357
6358                         my %set = parse_difftree_raw_line($line);
6359                         if (defined $set{'commit'}) {
6360                                 # finish previous commit
6361                                 if (%co) {
6362                                         print "</td>\n" .
6363                                               "<td class=\"link\">" .
6364                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6365                                               " | " .
6366                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6367                                         print "</td>\n" .
6368                                               "</tr>\n";
6369                                 }
6370
6371                                 if ($alternate) {
6372                                         print "<tr class=\"dark\">\n";
6373                                 } else {
6374                                         print "<tr class=\"light\">\n";
6375                                 }
6376                                 $alternate ^= 1;
6377                                 %co = parse_commit($set{'commit'});
6378                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6379                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6380                                       "<td><i>$author</i></td>\n" .
6381                                       "<td>" .
6382                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6383                                               -class => "list subject"},
6384                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6385                         } elsif (defined $set{'to_id'}) {
6386                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6387
6388                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6389                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6390                                               -class => "list"},
6391                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6392                                       "<br/>\n";
6393                         }
6394                 }
6395                 close $fd;
6396
6397                 # finish last commit (warning: repetition!)
6398                 if (%co) {
6399                         print "</td>\n" .
6400                               "<td class=\"link\">" .
6401                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6402                               " | " .
6403                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6404                         print "</td>\n" .
6405                               "</tr>\n";
6406                 }
6407
6408                 print "</table>\n";
6409         }
6410
6411         if ($searchtype eq 'grep') {
6412                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6413                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6414
6415                 print "<table class=\"grep_search\">\n";
6416                 my $alternate = 1;
6417                 my $matches = 0;
6418                 local $/ = "\n";
6419                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6420                         $search_use_regexp ? ('-E', '-i') : '-F',
6421                         $searchtext, $co{'tree'};
6422                 my $lastfile = '';
6423                 while (my $line = <$fd>) {
6424                         chomp $line;
6425                         my ($file, $lno, $ltext, $binary);
6426                         last if ($matches++ > 1000);
6427                         if ($line =~ /^Binary file (.+) matches$/) {
6428                                 $file = $1;
6429                                 $binary = 1;
6430                         } else {
6431                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6432                         }
6433                         if ($file ne $lastfile) {
6434                                 $lastfile and print "</td></tr>\n";
6435                                 if ($alternate++) {
6436                                         print "<tr class=\"dark\">\n";
6437                                 } else {
6438                                         print "<tr class=\"light\">\n";
6439                                 }
6440                                 print "<td class=\"list\">".
6441                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6442                                                                file_name=>"$file"),
6443                                                 -class => "list"}, esc_path($file));
6444                                 print "</td><td>\n";
6445                                 $lastfile = $file;
6446                         }
6447                         if ($binary) {
6448                                 print "<div class=\"binary\">Binary file</div>\n";
6449                         } else {
6450                                 $ltext = untabify($ltext);
6451                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6452                                         $ltext = esc_html($1, -nbsp=>1);
6453                                         $ltext .= '<span class="match">';
6454                                         $ltext .= esc_html($2, -nbsp=>1);
6455                                         $ltext .= '</span>';
6456                                         $ltext .= esc_html($3, -nbsp=>1);
6457                                 } else {
6458                                         $ltext = esc_html($ltext, -nbsp=>1);
6459                                 }
6460                                 print "<div class=\"pre\">" .
6461                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6462                                                                file_name=>"$file").'#l'.$lno,
6463                                                 -class => "linenr"}, sprintf('%4i', $lno))
6464                                         . ' ' .  $ltext . "</div>\n";
6465                         }
6466                 }
6467                 if ($lastfile) {
6468                         print "</td></tr>\n";
6469                         if ($matches > 1000) {
6470                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6471                         }
6472                 } else {
6473                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6474                 }
6475                 close $fd;
6476
6477                 print "</table>\n";
6478         }
6479         git_footer_html();
6480 }
6481
6482 sub git_search_help {
6483         git_header_html();
6484         git_print_page_nav('','', $hash,$hash,$hash);
6485         print <<EOT;
6486 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6487 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6488 the pattern entered is recognized as the POSIX extended
6489 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6490 insensitive).</p>
6491 <dl>
6492 <dt><b>commit</b></dt>
6493 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6494 EOT
6495         my $have_grep = gitweb_check_feature('grep');
6496         if ($have_grep) {
6497                 print <<EOT;
6498 <dt><b>grep</b></dt>
6499 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6500     a different one) are searched for the given pattern. On large trees, this search can take
6501 a while and put some strain on the server, so please use it with some consideration. Note that
6502 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6503 case-sensitive.</dd>
6504 EOT
6505         }
6506         print <<EOT;
6507 <dt><b>author</b></dt>
6508 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6509 <dt><b>committer</b></dt>
6510 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6511 EOT
6512         my $have_pickaxe = gitweb_check_feature('pickaxe');
6513         if ($have_pickaxe) {
6514                 print <<EOT;
6515 <dt><b>pickaxe</b></dt>
6516 <dd>All commits that caused the string to appear or disappear from any file (changes that
6517 added, removed or "modified" the string) will be listed. This search can take a while and
6518 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6519 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6520 EOT
6521         }
6522         print "</dl>\n";
6523         git_footer_html();
6524 }
6525
6526 sub git_shortlog {
6527         git_log_generic('shortlog', \&git_shortlog_body,
6528                         $hash, $hash_parent);
6529 }
6530
6531 ## ......................................................................
6532 ## feeds (RSS, Atom; OPML)
6533
6534 sub git_feed {
6535         my $format = shift || 'atom';
6536         my $have_blame = gitweb_check_feature('blame');
6537
6538         # Atom: http://www.atomenabled.org/developers/syndication/
6539         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6540         if ($format ne 'rss' && $format ne 'atom') {
6541                 die_error(400, "Unknown web feed format");
6542         }
6543
6544         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6545         my $head = $hash || 'HEAD';
6546         my @commitlist = parse_commits($head, 150, 0, $file_name);
6547
6548         my %latest_commit;
6549         my %latest_date;
6550         my $content_type = "application/$format+xml";
6551         if (defined $cgi->http('HTTP_ACCEPT') &&
6552                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6553                 # browser (feed reader) prefers text/xml
6554                 $content_type = 'text/xml';
6555         }
6556         if (defined($commitlist[0])) {
6557                 %latest_commit = %{$commitlist[0]};
6558                 my $latest_epoch = $latest_commit{'committer_epoch'};
6559                 %latest_date   = parse_date($latest_epoch);
6560                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6561                 if (defined $if_modified) {
6562                         my $since;
6563                         if (eval { require HTTP::Date; 1; }) {
6564                                 $since = HTTP::Date::str2time($if_modified);
6565                         } elsif (eval { require Time::ParseDate; 1; }) {
6566                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6567                         }
6568                         if (defined $since && $latest_epoch <= $since) {
6569                                 print $cgi->header(
6570                                         -type => $content_type,
6571                                         -charset => 'utf-8',
6572                                         -last_modified => $latest_date{'rfc2822'},
6573                                         -status => '304 Not Modified');
6574                                 return;
6575                         }
6576                 }
6577                 print $cgi->header(
6578                         -type => $content_type,
6579                         -charset => 'utf-8',
6580                         -last_modified => $latest_date{'rfc2822'});
6581         } else {
6582                 print $cgi->header(
6583                         -type => $content_type,
6584                         -charset => 'utf-8');
6585         }
6586
6587         # Optimization: skip generating the body if client asks only
6588         # for Last-Modified date.
6589         return if ($cgi->request_method() eq 'HEAD');
6590
6591         # header variables
6592         my $title = "$site_name - $project/$action";
6593         my $feed_type = 'log';
6594         if (defined $hash) {
6595                 $title .= " - '$hash'";
6596                 $feed_type = 'branch log';
6597                 if (defined $file_name) {
6598                         $title .= " :: $file_name";
6599                         $feed_type = 'history';
6600                 }
6601         } elsif (defined $file_name) {
6602                 $title .= " - $file_name";
6603                 $feed_type = 'history';
6604         }
6605         $title .= " $feed_type";
6606         my $descr = git_get_project_description($project);
6607         if (defined $descr) {
6608                 $descr = esc_html($descr);
6609         } else {
6610                 $descr = "$project " .
6611                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6612                          " feed";
6613         }
6614         my $owner = git_get_project_owner($project);
6615         $owner = esc_html($owner);
6616
6617         #header
6618         my $alt_url;
6619         if (defined $file_name) {
6620                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6621         } elsif (defined $hash) {
6622                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6623         } else {
6624                 $alt_url = href(-full=>1, action=>"summary");
6625         }
6626         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6627         if ($format eq 'rss') {
6628                 print <<XML;
6629 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6630 <channel>
6631 XML
6632                 print "<title>$title</title>\n" .
6633                       "<link>$alt_url</link>\n" .
6634                       "<description>$descr</description>\n" .
6635                       "<language>en</language>\n" .
6636                       # project owner is responsible for 'editorial' content
6637                       "<managingEditor>$owner</managingEditor>\n";
6638                 if (defined $logo || defined $favicon) {
6639                         # prefer the logo to the favicon, since RSS
6640                         # doesn't allow both
6641                         my $img = esc_url($logo || $favicon);
6642                         print "<image>\n" .
6643                               "<url>$img</url>\n" .
6644                               "<title>$title</title>\n" .
6645                               "<link>$alt_url</link>\n" .
6646                               "</image>\n";
6647                 }
6648                 if (%latest_date) {
6649                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6650                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6651                 }
6652                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6653         } elsif ($format eq 'atom') {
6654                 print <<XML;
6655 <feed xmlns="http://www.w3.org/2005/Atom">
6656 XML
6657                 print "<title>$title</title>\n" .
6658                       "<subtitle>$descr</subtitle>\n" .
6659                       '<link rel="alternate" type="text/html" href="' .
6660                       $alt_url . '" />' . "\n" .
6661                       '<link rel="self" type="' . $content_type . '" href="' .
6662                       $cgi->self_url() . '" />' . "\n" .
6663                       "<id>" . href(-full=>1) . "</id>\n" .
6664                       # use project owner for feed author
6665                       "<author><name>$owner</name></author>\n";
6666                 if (defined $favicon) {
6667                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6668                 }
6669                 if (defined $logo_url) {
6670                         # not twice as wide as tall: 72 x 27 pixels
6671                         print "<logo>" . esc_url($logo) . "</logo>\n";
6672                 }
6673                 if (! %latest_date) {
6674                         # dummy date to keep the feed valid until commits trickle in:
6675                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6676                 } else {
6677                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6678                 }
6679                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6680         }
6681
6682         # contents
6683         for (my $i = 0; $i <= $#commitlist; $i++) {
6684                 my %co = %{$commitlist[$i]};
6685                 my $commit = $co{'id'};
6686                 # we read 150, we always show 30 and the ones more recent than 48 hours
6687                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6688                         last;
6689                 }
6690                 my %cd = parse_date($co{'author_epoch'});
6691
6692                 # get list of changed files
6693                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6694                         $co{'parent'} || "--root",
6695                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6696                         or next;
6697                 my @difftree = map { chomp; $_ } <$fd>;
6698                 close $fd
6699                         or next;
6700
6701                 # print element (entry, item)
6702                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6703                 if ($format eq 'rss') {
6704                         print "<item>\n" .
6705                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6706                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6707                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6708                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6709                               "<link>$co_url</link>\n" .
6710                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6711                               "<content:encoded>" .
6712                               "<![CDATA[\n";
6713                 } elsif ($format eq 'atom') {
6714                         print "<entry>\n" .
6715                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6716                               "<updated>$cd{'iso-8601'}</updated>\n" .
6717                               "<author>\n" .
6718                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6719                         if ($co{'author_email'}) {
6720                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6721                         }
6722                         print "</author>\n" .
6723                               # use committer for contributor
6724                               "<contributor>\n" .
6725                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6726                         if ($co{'committer_email'}) {
6727                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6728                         }
6729                         print "</contributor>\n" .
6730                               "<published>$cd{'iso-8601'}</published>\n" .
6731                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6732                               "<id>$co_url</id>\n" .
6733                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6734                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6735                 }
6736                 my $comment = $co{'comment'};
6737                 print "<pre>\n";
6738                 foreach my $line (@$comment) {
6739                         $line = esc_html($line);
6740                         print "$line\n";
6741                 }
6742                 print "</pre><ul>\n";
6743                 foreach my $difftree_line (@difftree) {
6744                         my %difftree = parse_difftree_raw_line($difftree_line);
6745                         next if !$difftree{'from_id'};
6746
6747                         my $file = $difftree{'file'} || $difftree{'to_file'};
6748
6749                         print "<li>" .
6750                               "[" .
6751                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6752                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6753                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6754                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6755                                       -title => "diff"}, 'D');
6756                         if ($have_blame) {
6757                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6758                                                              file_name=>$file, hash_base=>$commit),
6759                                               -title => "blame"}, 'B');
6760                         }
6761                         # if this is not a feed of a file history
6762                         if (!defined $file_name || $file_name ne $file) {
6763                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6764                                                              file_name=>$file, hash=>$commit),
6765                                               -title => "history"}, 'H');
6766                         }
6767                         $file = esc_path($file);
6768                         print "] ".
6769                               "$file</li>\n";
6770                 }
6771                 if ($format eq 'rss') {
6772                         print "</ul>]]>\n" .
6773                               "</content:encoded>\n" .
6774                               "</item>\n";
6775                 } elsif ($format eq 'atom') {
6776                         print "</ul>\n</div>\n" .
6777                               "</content>\n" .
6778                               "</entry>\n";
6779                 }
6780         }
6781
6782         # end of feed
6783         if ($format eq 'rss') {
6784                 print "</channel>\n</rss>\n";
6785         } elsif ($format eq 'atom') {
6786                 print "</feed>\n";
6787         }
6788 }
6789
6790 sub git_rss {
6791         git_feed('rss');
6792 }
6793
6794 sub git_atom {
6795         git_feed('atom');
6796 }
6797
6798 sub git_opml {
6799         my @list = git_get_projects_list();
6800
6801         print $cgi->header(
6802                 -type => 'text/xml',
6803                 -charset => 'utf-8',
6804                 -content_disposition => 'inline; filename="opml.xml"');
6805
6806         print <<XML;
6807 <?xml version="1.0" encoding="utf-8"?>
6808 <opml version="1.0">
6809 <head>
6810   <title>$site_name OPML Export</title>
6811 </head>
6812 <body>
6813 <outline text="git RSS feeds">
6814 XML
6815
6816         foreach my $pr (@list) {
6817                 my %proj = %$pr;
6818                 my $head = git_get_head_hash($proj{'path'});
6819                 if (!defined $head) {
6820                         next;
6821                 }
6822                 $git_dir = "$projectroot/$proj{'path'}";
6823                 my %co = parse_commit($head);
6824                 if (!%co) {
6825                         next;
6826                 }
6827
6828                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6829                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6830                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6831                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6832         }
6833         print <<XML;
6834 </outline>
6835 </body>
6836 </opml>
6837 XML
6838 }