git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99 # URI of gitweb.js (JavaScript code for gitweb)
 100 our $javascript = "++GITWEB_JS++";
 101
 102 # URI and label (title) of GIT logo link
 103 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 104 #our $logo_label = "git documentation";
 105 our $logo_url = "http://git-scm.com/";
 106 our $logo_label = "git homepage";
 107
 108 # source of projects list
 109 our $projects_list = "++GITWEB_LIST++";
 110
 111 # the width (in characters) of the projects list "Description" column
 112 our $projects_list_description_width = 25;
 113
 114 # default order of projects list
 115 # valid values are none, project, descr, owner, and age
 116 our $default_projects_order = "project";
 117
 118 # show repository only if this file exists
 119 # (only effective if this variable evaluates to true)
 120 our $export_ok = "++GITWEB_EXPORT_OK++";
 121
 122 # show repository only if this subroutine returns true
 123 # when given the path to the project, for example:
 124 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 125 our $export_auth_hook = undef;
 126
 127 # only allow viewing of repositories also shown on the overview page
 128 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 129
 130 # list of git base URLs used for URL to where fetch project from,
 131 # i.e. full URL is "$git_base_url/$project"
 132 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 133
 134 # default blob_plain mimetype and default charset for text/plain blob
 135 our $default_blob_plain_mimetype = 'text/plain';
 136 our $default_text_plain_charset  = undef;
 137
 138 # file to use for guessing MIME types before trying /etc/mime.types
 139 # (relative to the current git repository)
 140 our $mimetypes_file = undef;
 141
 142 # assume this charset if line contains non-UTF-8 characters;
 143 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 144 # for which encoding all byte sequences are valid, for example
 145 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 146 # could be even 'utf-8' for the old behavior)
 147 our $fallback_encoding = 'latin1';
 148
 149 # rename detection options for git-diff and git-diff-tree
 150 # - default is '-M', with the cost proportional to
 151 #   (number of removed files) * (number of new files).
 152 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 153 #   (number of changed files + number of removed files) * (number of new files)
 154 # - even more costly is '-C', '--find-copies-harder' with cost
 155 #   (number of files in the original tree) * (number of new files)
 156 # - one might want to include '-B' option, e.g. '-B', '-M'
 157 our @diff_opts = ('-M'); # taken from git_commit
 158
 159 # Disables features that would allow repository owners to inject script into
 160 # the gitweb domain.
 161 our $prevent_xss = 0;
 162
 163 # information about snapshot formats that gitweb is capable of serving
 164 our %known_snapshot_formats = (
 165         # name => {
 166         #       'display' => display name,
 167         #       'type' => mime type,
 168         #       'suffix' => filename suffix,
 169         #       'format' => --format for git-archive,
 170         #       'compressor' => [compressor command and arguments]
 171         #                       (array reference, optional)
 172         #       'disabled' => boolean (optional)}
 173         #
 174         'tgz' => {
 175                 'display' => 'tar.gz',
 176                 'type' => 'application/x-gzip',
 177                 'suffix' => '.tar.gz',
 178                 'format' => 'tar',
 179                 'compressor' => ['gzip']},
 180
 181         'tbz2' => {
 182                 'display' => 'tar.bz2',
 183                 'type' => 'application/x-bzip2',
 184                 'suffix' => '.tar.bz2',
 185                 'format' => 'tar',
 186                 'compressor' => ['bzip2']},
 187
 188         'txz' => {
 189                 'display' => 'tar.xz',
 190                 'type' => 'application/x-xz',
 191                 'suffix' => '.tar.xz',
 192                 'format' => 'tar',
 193                 'compressor' => ['xz'],
 194                 'disabled' => 1},
 195
 196         'zip' => {
 197                 'display' => 'zip',
 198                 'type' => 'application/x-zip',
 199                 'suffix' => '.zip',
 200                 'format' => 'zip'},
 201 );
 202
 203 # Aliases so we understand old gitweb.snapshot values in repository
 204 # configuration.
 205 our %known_snapshot_format_aliases = (
 206         'gzip'  => 'tgz',
 207         'bzip2' => 'tbz2',
 208         'xz'    => 'txz',
 209
 210         # backward compatibility: legacy gitweb config support
 211         'x-gzip' => undef, 'gz' => undef,
 212         'x-bzip2' => undef, 'bz2' => undef,
 213         'x-zip' => undef, '' => undef,
 214 );
 215
 216 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 217 # are changed, it may be appropriate to change these values too via
 218 # $GITWEB_CONFIG.
 219 our %avatar_size = (
 220         'default' => 16,
 221         'double'  => 32
 222 );
 223
 224 # Used to set the maximum load that we will still respond to gitweb queries.
 225 # If server load exceed this value then return "503 server busy" error.
 226 # If gitweb cannot determined server load, it is taken to be 0.
 227 # Leave it undefined (or set to 'undef') to turn off load checking.
 228 our $maxload = 300;
 229
 230 # You define site-wide feature defaults here; override them with
 231 # $GITWEB_CONFIG as necessary.
 232 our %feature = (
 233         # feature => {
 234         #       'sub' => feature-sub (subroutine),
 235         #       'override' => allow-override (boolean),
 236         #       'default' => [ default options...] (array reference)}
 237         #
 238         # if feature is overridable (it means that allow-override has true value),
 239         # then feature-sub will be called with default options as parameters;
 240         # return value of feature-sub indicates if to enable specified feature
 241         #
 242         # if there is no 'sub' key (no feature-sub), then feature cannot be
 243         # overriden
 244         #
 245         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 246         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 247         # is enabled
 248
 249         # Enable the 'blame' blob view, showing the last commit that modified
 250         # each line in the file. This can be very CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'blame'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'blame'}{'override'} = 1;
 256         # and in project config gitweb.blame = 0|1;
 257         'blame' => {
 258                 'sub' => sub { feature_bool('blame', @_) },
 259                 'override' => 0,
 260                 'default' => [0]},
 261
 262         # Enable the 'snapshot' link, providing a compressed archive of any
 263         # tree. This can potentially generate high traffic if you have large
 264         # project.
 265
 266         # Value is a list of formats defined in %known_snapshot_formats that
 267         # you wish to offer.
 268         # To disable system wide have in $GITWEB_CONFIG
 269         # $feature{'snapshot'}{'default'} = [];
 270         # To have project specific config enable override in $GITWEB_CONFIG
 271         # $feature{'snapshot'}{'override'} = 1;
 272         # and in project config, a comma-separated list of formats or "none"
 273         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 274         'snapshot' => {
 275                 'sub' => \&feature_snapshot,
 276                 'override' => 0,
 277                 'default' => ['tgz']},
 278
 279         # Enable text search, which will list the commits which match author,
 280         # committer or commit text to a given string.  Enabled by default.
 281         # Project specific override is not supported.
 282         'search' => {
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable grep search, which will list the files in currently selected
 287         # tree containing the given string. Enabled by default. This can be
 288         # potentially CPU-intensive, of course.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'grep'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'grep'}{'override'} = 1;
 294         # and in project config gitweb.grep = 0|1;
 295         'grep' => {
 296                 'sub' => sub { feature_bool('grep', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable the pickaxe search, which will list the commits that modified
 301         # a given string in a file. This can be practical and quite faster
 302         # alternative to 'blame', but still potentially CPU-intensive.
 303
 304         # To enable system wide have in $GITWEB_CONFIG
 305         # $feature{'pickaxe'}{'default'} = [1];
 306         # To have project specific config enable override in $GITWEB_CONFIG
 307         # $feature{'pickaxe'}{'override'} = 1;
 308         # and in project config gitweb.pickaxe = 0|1;
 309         'pickaxe' => {
 310                 'sub' => sub { feature_bool('pickaxe', @_) },
 311                 'override' => 0,
 312                 'default' => [1]},
 313
 314         # Enable showing size of blobs in a 'tree' view, in a separate
 315         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 316
 317         # To disable system wide have in $GITWEB_CONFIG
 318         # $feature{'show-sizes'}{'default'} = [0];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'show-sizes'}{'override'} = 1;
 321         # and in project config gitweb.showsizes = 0|1;
 322         'show-sizes' => {
 323                 'sub' => sub { feature_bool('showsizes', @_) },
 324                 'override' => 0,
 325                 'default' => [1]},
 326
 327         # Make gitweb use an alternative format of the URLs which can be
 328         # more readable and natural-looking: project name is embedded
 329         # directly in the path and the query string contains other
 330         # auxiliary information. All gitweb installations recognize
 331         # URL in either format; this configures in which formats gitweb
 332         # generates links.
 333
 334         # To enable system wide have in $GITWEB_CONFIG
 335         # $feature{'pathinfo'}{'default'} = [1];
 336         # Project specific override is not supported.
 337
 338         # Note that you will need to change the default location of CSS,
 339         # favicon, logo and possibly other files to an absolute URL. Also,
 340         # if gitweb.cgi serves as your indexfile, you will need to force
 341         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 342         'pathinfo' => {
 343                 'override' => 0,
 344                 'default' => [0]},
 345
 346         # Make gitweb consider projects in project root subdirectories
 347         # to be forks of existing projects. Given project $projname.git,
 348         # projects matching $projname/*.git will not be shown in the main
 349         # projects list, instead a '+' mark will be added to $projname
 350         # there and a 'forks' view will be enabled for the project, listing
 351         # all the forks. If project list is taken from a file, forks have
 352         # to be listed after the main project.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'forks'}{'default'} = [1];
 356         # Project specific override is not supported.
 357         'forks' => {
 358                 'override' => 0,
 359                 'default' => [0]},
 360
 361         # Insert custom links to the action bar of all project pages.
 362         # This enables you mainly to link to third-party scripts integrating
 363         # into gitweb; e.g. git-browser for graphical history representation
 364         # or custom web-based repository administration interface.
 365
 366         # The 'default' value consists of a list of triplets in the form
 367         # (label, link, position) where position is the label after which
 368         # to insert the link and link is a format string where %n expands
 369         # to the project name, %f to the project path within the filesystem,
 370         # %h to the current hash (h gitweb parameter) and %b to the current
 371         # hash base (hb gitweb parameter); %% expands to %.
 372
 373         # To enable system wide have in $GITWEB_CONFIG e.g.
 374         # $feature{'actions'}{'default'} = [('graphiclog',
 375         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 376         # Project specific override is not supported.
 377         'actions' => {
 378                 'override' => 0,
 379                 'default' => []},
 380
 381         # Allow gitweb scan project content tags described in ctags/
 382         # of project repository, and display the popular Web 2.0-ish
 383         # "tag cloud" near the project list. Note that this is something
 384         # COMPLETELY different from the normal Git tags.
 385
 386         # gitweb by itself can show existing tags, but it does not handle
 387         # tagging itself; you need an external application for that.
 388         # For an example script, check Girocco's cgi/tagproj.cgi.
 389         # You may want to install the HTML::TagCloud Perl module to get
 390         # a pretty tag cloud instead of just a list of tags.
 391
 392         # To enable system wide have in $GITWEB_CONFIG
 393         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 394         # Project specific override is not supported.
 395         'ctags' => {
 396                 'override' => 0,
 397                 'default' => [0]},
 398
 399         # The maximum number of patches in a patchset generated in patch
 400         # view. Set this to 0 or undef to disable patch view, or to a
 401         # negative number to remove any limit.
 402
 403         # To disable system wide have in $GITWEB_CONFIG
 404         # $feature{'patches'}{'default'} = [0];
 405         # To have project specific config enable override in $GITWEB_CONFIG
 406         # $feature{'patches'}{'override'} = 1;
 407         # and in project config gitweb.patches = 0|n;
 408         # where n is the maximum number of patches allowed in a patchset.
 409         'patches' => {
 410                 'sub' => \&feature_patches,
 411                 'override' => 0,
 412                 'default' => [16]},
 413
 414         # Avatar support. When this feature is enabled, views such as
 415         # shortlog or commit will display an avatar associated with
 416         # the email of the committer(s) and/or author(s).
 417
 418         # Currently available providers are gravatar and picon.
 419         # If an unknown provider is specified, the feature is disabled.
 420
 421         # Gravatar depends on Digest::MD5.
 422         # Picon currently relies on the indiana.edu database.
 423
 424         # To enable system wide have in $GITWEB_CONFIG
 425         # $feature{'avatar'}{'default'} = ['<provider>'];
 426         # where <provider> is either gravatar or picon.
 427         # To have project specific config enable override in $GITWEB_CONFIG
 428         # $feature{'avatar'}{'override'} = 1;
 429         # and in project config gitweb.avatar = <provider>;
 430         'avatar' => {
 431                 'sub' => \&feature_avatar,
 432                 'override' => 0,
 433                 'default' => ['']},
 434
 435         # Enable displaying how much time and how many git commands
 436         # it took to generate and display page.  Disabled by default.
 437         # Project specific override is not supported.
 438         'timed' => {
 439                 'override' => 0,
 440                 'default' => [0]},
 441
 442         # Enable turning some links into links to actions which require
 443         # JavaScript to run (like 'blame_incremental').  Not enabled by
 444         # default.  Project specific override is currently not supported.
 445         'javascript-actions' => {
 446                 'override' => 0,
 447                 'default' => [0]},
 448 );
 449
 450 sub gitweb_get_feature {
 451         my ($name) = @_;
 452         return unless exists $feature{$name};
 453         my ($sub, $override, @defaults) = (
 454                 $feature{$name}{'sub'},
 455                 $feature{$name}{'override'},
 456                 @{$feature{$name}{'default'}});
 457         # project specific override is possible only if we have project
 458         our $git_dir; # global variable, declared later
 459         if (!$override || !defined $git_dir) {
 460                 return @defaults;
 461         }
 462         if (!defined $sub) {
 463                 warn "feature $name is not overridable";
 464                 return @defaults;
 465         }
 466         return $sub->(@defaults);
 467 }
 468
 469 # A wrapper to check if a given feature is enabled.
 470 # With this, you can say
 471 #
 472 #   my $bool_feat = gitweb_check_feature('bool_feat');
 473 #   gitweb_check_feature('bool_feat') or somecode;
 474 #
 475 # instead of
 476 #
 477 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 478 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 479 #
 480 sub gitweb_check_feature {
 481         return (gitweb_get_feature(@_))[0];
 482 }
 483
 484
 485 sub feature_bool {
 486         my $key = shift;
 487         my ($val) = git_get_project_config($key, '--bool');
 488
 489         if (!defined $val) {
 490                 return ($_[0]);
 491         } elsif ($val eq 'true') {
 492                 return (1);
 493         } elsif ($val eq 'false') {
 494                 return (0);
 495         }
 496 }
 497
 498 sub feature_snapshot {
 499         my (@fmts) = @_;
 500
 501         my ($val) = git_get_project_config('snapshot');
 502
 503         if ($val) {
 504                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 505         }
 506
 507         return @fmts;
 508 }
 509
 510 sub feature_patches {
 511         my @val = (git_get_project_config('patches', '--int'));
 512
 513         if (@val) {
 514                 return @val;
 515         }
 516
 517         return ($_[0]);
 518 }
 519
 520 sub feature_avatar {
 521         my @val = (git_get_project_config('avatar'));
 522
 523         return @val ? @val : @_;
 524 }
 525
 526 # checking HEAD file with -e is fragile if the repository was
 527 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 528 # and then pruned.
 529 sub check_head_link {
 530         my ($dir) = @_;
 531         my $headfile = "$dir/HEAD";
 532         return ((-e $headfile) ||
 533                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 534 }
 535
 536 sub check_export_ok {
 537         my ($dir) = @_;
 538         return (check_head_link($dir) &&
 539                 (!$export_ok || -e "$dir/$export_ok") &&
 540                 (!$export_auth_hook || $export_auth_hook->($dir)));
 541 }
 542
 543 # process alternate names for backward compatibility
 544 # filter out unsupported (unknown) snapshot formats
 545 sub filter_snapshot_fmts {
 546         my @fmts = @_;
 547
 548         @fmts = map {
 549                 exists $known_snapshot_format_aliases{$_} ?
 550                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 551         @fmts = grep {
 552                 exists $known_snapshot_formats{$_} &&
 553                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 554 }
 555
 556 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 557 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 558 # die if there are errors parsing config file
 559 if (-e $GITWEB_CONFIG) {
 560         do $GITWEB_CONFIG;
 561         die $@ if $@;
 562 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 563         do $GITWEB_CONFIG_SYSTEM;
 564         die $@ if $@;
 565 }
 566
 567 # Get loadavg of system, to compare against $maxload.
 568 # Currently it requires '/proc/loadavg' present to get loadavg;
 569 # if it is not present it returns 0, which means no load checking.
 570 sub get_loadavg {
 571         if( -e '/proc/loadavg' ){
 572                 open my $fd, '<', '/proc/loadavg'
 573                         or return 0;
 574                 my @load = split(/\s+/, scalar <$fd>);
 575                 close $fd;
 576
 577                 # The first three columns measure CPU and IO utilization of the last one,
 578                 # five, and 10 minute periods.  The fourth column shows the number of
 579                 # currently running processes and the total number of processes in the m/n
 580                 # format.  The last column displays the last process ID used.
 581                 return $load[0] || 0;
 582         }
 583         # additional checks for load average should go here for things that don't export
 584         # /proc/loadavg
 585
 586         return 0;
 587 }
 588
 589 # version of the core git binary
 590 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 591 $number_of_git_cmds++;
 592
 593 $projects_list ||= $projectroot;
 594
 595 if (defined $maxload && get_loadavg() > $maxload) {
 596         die_error(503, "The load average on the server is too high");
 597 }
 598
 599 # ======================================================================
 600 # input validation and dispatch
 601
 602 # input parameters can be collected from a variety of sources (presently, CGI
 603 # and PATH_INFO), so we define an %input_params hash that collects them all
 604 # together during validation: this allows subsequent uses (e.g. href()) to be
 605 # agnostic of the parameter origin
 606
 607 our %input_params = ();
 608
 609 # input parameters are stored with the long parameter name as key. This will
 610 # also be used in the href subroutine to convert parameters to their CGI
 611 # equivalent, and since the href() usage is the most frequent one, we store
 612 # the name -> CGI key mapping here, instead of the reverse.
 613 #
 614 # XXX: Warning: If you touch this, check the search form for updating,
 615 # too.
 616
 617 our @cgi_param_mapping = (
 618         project => "p",
 619         action => "a",
 620         file_name => "f",
 621         file_parent => "fp",
 622         hash => "h",
 623         hash_parent => "hp",
 624         hash_base => "hb",
 625         hash_parent_base => "hpb",
 626         page => "pg",
 627         order => "o",
 628         searchtext => "s",
 629         searchtype => "st",
 630         snapshot_format => "sf",
 631         extra_options => "opt",
 632         search_use_regexp => "sr",
 633         # this must be last entry (for manipulation from JavaScript)
 634         javascript => "js"
 635 );
 636 our %cgi_param_mapping = @cgi_param_mapping;
 637
 638 # we will also need to know the possible actions, for validation
 639 our %actions = (
 640         "blame" => \&git_blame,
 641         "blame_incremental" => \&git_blame_incremental,
 642         "blame_data" => \&git_blame_data,
 643         "blobdiff" => \&git_blobdiff,
 644         "blobdiff_plain" => \&git_blobdiff_plain,
 645         "blob" => \&git_blob,
 646         "blob_plain" => \&git_blob_plain,
 647         "commitdiff" => \&git_commitdiff,
 648         "commitdiff_plain" => \&git_commitdiff_plain,
 649         "commit" => \&git_commit,
 650         "forks" => \&git_forks,
 651         "heads" => \&git_heads,
 652         "history" => \&git_history,
 653         "log" => \&git_log,
 654         "patch" => \&git_patch,
 655         "patches" => \&git_patches,
 656         "rss" => \&git_rss,
 657         "atom" => \&git_atom,
 658         "search" => \&git_search,
 659         "search_help" => \&git_search_help,
 660         "shortlog" => \&git_shortlog,
 661         "summary" => \&git_summary,
 662         "tag" => \&git_tag,
 663         "tags" => \&git_tags,
 664         "tree" => \&git_tree,
 665         "snapshot" => \&git_snapshot,
 666         "object" => \&git_object,
 667         # those below don't need $project
 668         "opml" => \&git_opml,
 669         "project_list" => \&git_project_list,
 670         "project_index" => \&git_project_index,
 671 );
 672
 673 # finally, we have the hash of allowed extra_options for the commands that
 674 # allow them
 675 our %allowed_options = (
 676         "--no-merges" => [ qw(rss atom log shortlog history) ],
 677 );
 678
 679 # fill %input_params with the CGI parameters. All values except for 'opt'
 680 # should be single values, but opt can be an array. We should probably
 681 # build an array of parameters that can be multi-valued, but since for the time
 682 # being it's only this one, we just single it out
 683 while (my ($name, $symbol) = each %cgi_param_mapping) {
 684         if ($symbol eq 'opt') {
 685                 $input_params{$name} = [ $cgi->param($symbol) ];
 686         } else {
 687                 $input_params{$name} = $cgi->param($symbol);
 688         }
 689 }
 690
 691 # now read PATH_INFO and update the parameter list for missing parameters
 692 sub evaluate_path_info {
 693         return if defined $input_params{'project'};
 694         return if !$path_info;
 695         $path_info =~ s,^/+,,;
 696         return if !$path_info;
 697
 698         # find which part of PATH_INFO is project
 699         my $project = $path_info;
 700         $project =~ s,/+$,,;
 701         while ($project && !check_head_link("$projectroot/$project")) {
 702                 $project =~ s,/*[^/]*$,,;
 703         }
 704         return unless $project;
 705         $input_params{'project'} = $project;
 706
 707         # do not change any parameters if an action is given using the query string
 708         return if $input_params{'action'};
 709         $path_info =~ s,^\Q$project\E/*,,;
 710
 711         # next, check if we have an action
 712         my $action = $path_info;
 713         $action =~ s,/.*$,,;
 714         if (exists $actions{$action}) {
 715                 $path_info =~ s,^$action/*,,;
 716                 $input_params{'action'} = $action;
 717         }
 718
 719         # list of actions that want hash_base instead of hash, but can have no
 720         # pathname (f) parameter
 721         my @wants_base = (
 722                 'tree',
 723                 'history',
 724         );
 725
 726         # we want to catch
 727         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 728         my ($parentrefname, $parentpathname, $refname, $pathname) =
 729                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 730
 731         # first, analyze the 'current' part
 732         if (defined $pathname) {
 733                 # we got "branch:filename" or "branch:dir/"
 734                 # we could use git_get_type(branch:pathname), but:
 735                 # - it needs $git_dir
 736                 # - it does a git() call
 737                 # - the convention of terminating directories with a slash
 738                 #   makes it superfluous
 739                 # - embedding the action in the PATH_INFO would make it even
 740                 #   more superfluous
 741                 $pathname =~ s,^/+,,;
 742                 if (!$pathname || substr($pathname, -1) eq "/") {
 743                         $input_params{'action'} ||= "tree";
 744                         $pathname =~ s,/$,,;
 745                 } else {
 746                         # the default action depends on whether we had parent info
 747                         # or not
 748                         if ($parentrefname) {
 749                                 $input_params{'action'} ||= "blobdiff_plain";
 750                         } else {
 751                                 $input_params{'action'} ||= "blob_plain";
 752                         }
 753                 }
 754                 $input_params{'hash_base'} ||= $refname;
 755                 $input_params{'file_name'} ||= $pathname;
 756         } elsif (defined $refname) {
 757                 # we got "branch". In this case we have to choose if we have to
 758                 # set hash or hash_base.
 759                 #
 760                 # Most of the actions without a pathname only want hash to be
 761                 # set, except for the ones specified in @wants_base that want
 762                 # hash_base instead. It should also be noted that hand-crafted
 763                 # links having 'history' as an action and no pathname or hash
 764                 # set will fail, but that happens regardless of PATH_INFO.
 765                 $input_params{'action'} ||= "shortlog";
 766                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 767                         $input_params{'hash_base'} ||= $refname;
 768                 } else {
 769                         $input_params{'hash'} ||= $refname;
 770                 }
 771         }
 772
 773         # next, handle the 'parent' part, if present
 774         if (defined $parentrefname) {
 775                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 776                 # someproject/blobdiff/oldrev..newrev:/filename
 777                 if ($parentpathname) {
 778                         $parentpathname =~ s,^/+,,;
 779                         $parentpathname =~ s,/$,,;
 780                         $input_params{'file_parent'} ||= $parentpathname;
 781                 } else {
 782                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 783                 }
 784                 # we assume that hash_parent_base is wanted if a path was specified,
 785                 # or if the action wants hash_base instead of hash
 786                 if (defined $input_params{'file_parent'} ||
 787                         grep { $_ eq $input_params{'action'} } @wants_base) {
 788                         $input_params{'hash_parent_base'} ||= $parentrefname;
 789                 } else {
 790                         $input_params{'hash_parent'} ||= $parentrefname;
 791                 }
 792         }
 793
 794         # for the snapshot action, we allow URLs in the form
 795         # $project/snapshot/$hash.ext
 796         # where .ext determines the snapshot and gets removed from the
 797         # passed $refname to provide the $hash.
 798         #
 799         # To be able to tell that $refname includes the format extension, we
 800         # require the following two conditions to be satisfied:
 801         # - the hash input parameter MUST have been set from the $refname part
 802         #   of the URL (i.e. they must be equal)
 803         # - the snapshot format MUST NOT have been defined already (e.g. from
 804         #   CGI parameter sf)
 805         # It's also useless to try any matching unless $refname has a dot,
 806         # so we check for that too
 807         if (defined $input_params{'action'} &&
 808                 $input_params{'action'} eq 'snapshot' &&
 809                 defined $refname && index($refname, '.') != -1 &&
 810                 $refname eq $input_params{'hash'} &&
 811                 !defined $input_params{'snapshot_format'}) {
 812                 # We loop over the known snapshot formats, checking for
 813                 # extensions. Allowed extensions are both the defined suffix
 814                 # (which includes the initial dot already) and the snapshot
 815                 # format key itself, with a prepended dot
 816                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 817                         my $hash = $refname;
 818                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 819                                 next;
 820                         }
 821                         my $sfx = $1;
 822                         # a valid suffix was found, so set the snapshot format
 823                         # and reset the hash parameter
 824                         $input_params{'snapshot_format'} = $fmt;
 825                         $input_params{'hash'} = $hash;
 826                         # we also set the format suffix to the one requested
 827                         # in the URL: this way a request for e.g. .tgz returns
 828                         # a .tgz instead of a .tar.gz
 829                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 830                         last;
 831                 }
 832         }
 833 }
 834 evaluate_path_info();
 835
 836 our $action = $input_params{'action'};
 837 if (defined $action) {
 838         if (!validate_action($action)) {
 839                 die_error(400, "Invalid action parameter");
 840         }
 841 }
 842
 843 # parameters which are pathnames
 844 our $project = $input_params{'project'};
 845 if (defined $project) {
 846         if (!validate_project($project)) {
 847                 undef $project;
 848                 die_error(404, "No such project");
 849         }
 850 }
 851
 852 our $file_name = $input_params{'file_name'};
 853 if (defined $file_name) {
 854         if (!validate_pathname($file_name)) {
 855                 die_error(400, "Invalid file parameter");
 856         }
 857 }
 858
 859 our $file_parent = $input_params{'file_parent'};
 860 if (defined $file_parent) {
 861         if (!validate_pathname($file_parent)) {
 862                 die_error(400, "Invalid file parent parameter");
 863         }
 864 }
 865
 866 # parameters which are refnames
 867 our $hash = $input_params{'hash'};
 868 if (defined $hash) {
 869         if (!validate_refname($hash)) {
 870                 die_error(400, "Invalid hash parameter");
 871         }
 872 }
 873
 874 our $hash_parent = $input_params{'hash_parent'};
 875 if (defined $hash_parent) {
 876         if (!validate_refname($hash_parent)) {
 877                 die_error(400, "Invalid hash parent parameter");
 878         }
 879 }
 880
 881 our $hash_base = $input_params{'hash_base'};
 882 if (defined $hash_base) {
 883         if (!validate_refname($hash_base)) {
 884                 die_error(400, "Invalid hash base parameter");
 885         }
 886 }
 887
 888 our @extra_options = @{$input_params{'extra_options'}};
 889 # @extra_options is always defined, since it can only be (currently) set from
 890 # CGI, and $cgi->param() returns the empty array in array context if the param
 891 # is not set
 892 foreach my $opt (@extra_options) {
 893         if (not exists $allowed_options{$opt}) {
 894                 die_error(400, "Invalid option parameter");
 895         }
 896         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 897                 die_error(400, "Invalid option parameter for this action");
 898         }
 899 }
 900
 901 our $hash_parent_base = $input_params{'hash_parent_base'};
 902 if (defined $hash_parent_base) {
 903         if (!validate_refname($hash_parent_base)) {
 904                 die_error(400, "Invalid hash parent base parameter");
 905         }
 906 }
 907
 908 # other parameters
 909 our $page = $input_params{'page'};
 910 if (defined $page) {
 911         if ($page =~ m/[^0-9]/) {
 912                 die_error(400, "Invalid page parameter");
 913         }
 914 }
 915
 916 our $searchtype = $input_params{'searchtype'};
 917 if (defined $searchtype) {
 918         if ($searchtype =~ m/[^a-z]/) {
 919                 die_error(400, "Invalid searchtype parameter");
 920         }
 921 }
 922
 923 our $search_use_regexp = $input_params{'search_use_regexp'};
 924
 925 our $searchtext = $input_params{'searchtext'};
 926 our $search_regexp;
 927 if (defined $searchtext) {
 928         if (length($searchtext) < 2) {
 929                 die_error(403, "At least two characters are required for search parameter");
 930         }
 931         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 932 }
 933
 934 # path to the current git repository
 935 our $git_dir;
 936 $git_dir = "$projectroot/$project" if $project;
 937
 938 # list of supported snapshot formats
 939 our @snapshot_fmts = gitweb_get_feature('snapshot');
 940 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 941
 942 # check that the avatar feature is set to a known provider name,
 943 # and for each provider check if the dependencies are satisfied.
 944 # if the provider name is invalid or the dependencies are not met,
 945 # reset $git_avatar to the empty string.
 946 our ($git_avatar) = gitweb_get_feature('avatar');
 947 if ($git_avatar eq 'gravatar') {
 948         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 949 } elsif ($git_avatar eq 'picon') {
 950         # no dependencies
 951 } else {
 952         $git_avatar = '';
 953 }
 954
 955 # dispatch
 956 if (!defined $action) {
 957         if (defined $hash) {
 958                 $action = git_get_type($hash);
 959         } elsif (defined $hash_base && defined $file_name) {
 960                 $action = git_get_type("$hash_base:$file_name");
 961         } elsif (defined $project) {
 962                 $action = 'summary';
 963         } else {
 964                 $action = 'project_list';
 965         }
 966 }
 967 if (!defined($actions{$action})) {
 968         die_error(400, "Unknown action");
 969 }
 970 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 971     !$project) {
 972         die_error(400, "Project needed");
 973 }
 974 $actions{$action}->();
 975 exit;
 976
 977 ## ======================================================================
 978 ## action links
 979
 980 sub href {
 981         my %params = @_;
 982         # default is to use -absolute url() i.e. $my_uri
 983         my $href = $params{-full} ? $my_url : $my_uri;
 984
 985         $params{'project'} = $project unless exists $params{'project'};
 986
 987         if ($params{-replay}) {
 988                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 989                         if (!exists $params{$name}) {
 990                                 $params{$name} = $input_params{$name};
 991                         }
 992                 }
 993         }
 994
 995         my $use_pathinfo = gitweb_check_feature('pathinfo');
 996         if ($use_pathinfo and defined $params{'project'}) {
 997                 # try to put as many parameters as possible in PATH_INFO:
 998                 #   - project name
 999                 #   - action
1000                 #   - hash_parent or hash_parent_base:/file_parent
1001                 #   - hash or hash_base:/filename
1002                 #   - the snapshot_format as an appropriate suffix
1003
1004                 # When the script is the root DirectoryIndex for the domain,
1005                 # $href here would be something like http://gitweb.example.com/
1006                 # Thus, we strip any trailing / from $href, to spare us double
1007                 # slashes in the final URL
1008                 $href =~ s,/$,,;
1009
1010                 # Then add the project name, if present
1011                 $href .= "/".esc_url($params{'project'});
1012                 delete $params{'project'};
1013
1014                 # since we destructively absorb parameters, we keep this
1015                 # boolean that remembers if we're handling a snapshot
1016                 my $is_snapshot = $params{'action'} eq 'snapshot';
1017
1018                 # Summary just uses the project path URL, any other action is
1019                 # added to the URL
1020                 if (defined $params{'action'}) {
1021                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1022                         delete $params{'action'};
1023                 }
1024
1025                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1026                 # stripping nonexistent or useless pieces
1027                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1028                         || $params{'hash_parent'} || $params{'hash'});
1029                 if (defined $params{'hash_base'}) {
1030                         if (defined $params{'hash_parent_base'}) {
1031                                 $href .= esc_url($params{'hash_parent_base'});
1032                                 # skip the file_parent if it's the same as the file_name
1033                                 if (defined $params{'file_parent'}) {
1034                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1035                                                 delete $params{'file_parent'};
1036                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1037                                                 $href .= ":/".esc_url($params{'file_parent'});
1038                                                 delete $params{'file_parent'};
1039                                         }
1040                                 }
1041                                 $href .= "..";
1042                                 delete $params{'hash_parent'};
1043                                 delete $params{'hash_parent_base'};
1044                         } elsif (defined $params{'hash_parent'}) {
1045                                 $href .= esc_url($params{'hash_parent'}). "..";
1046                                 delete $params{'hash_parent'};
1047                         }
1048
1049                         $href .= esc_url($params{'hash_base'});
1050                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1051                                 $href .= ":/".esc_url($params{'file_name'});
1052                                 delete $params{'file_name'};
1053                         }
1054                         delete $params{'hash'};
1055                         delete $params{'hash_base'};
1056                 } elsif (defined $params{'hash'}) {
1057                         $href .= esc_url($params{'hash'});
1058                         delete $params{'hash'};
1059                 }
1060
1061                 # If the action was a snapshot, we can absorb the
1062                 # snapshot_format parameter too
1063                 if ($is_snapshot) {
1064                         my $fmt = $params{'snapshot_format'};
1065                         # snapshot_format should always be defined when href()
1066                         # is called, but just in case some code forgets, we
1067                         # fall back to the default
1068                         $fmt ||= $snapshot_fmts[0];
1069                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1070                         delete $params{'snapshot_format'};
1071                 }
1072         }
1073
1074         # now encode the parameters explicitly
1075         my @result = ();
1076         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1077                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1078                 if (defined $params{$name}) {
1079                         if (ref($params{$name}) eq "ARRAY") {
1080                                 foreach my $par (@{$params{$name}}) {
1081                                         push @result, $symbol . "=" . esc_param($par);
1082                                 }
1083                         } else {
1084                                 push @result, $symbol . "=" . esc_param($params{$name});
1085                         }
1086                 }
1087         }
1088         $href .= "?" . join(';', @result) if scalar @result;
1089
1090         return $href;
1091 }
1092
1093
1094 ## ======================================================================
1095 ## validation, quoting/unquoting and escaping
1096
1097 sub validate_action {
1098         my $input = shift || return undef;
1099         return undef unless exists $actions{$input};
1100         return $input;
1101 }
1102
1103 sub validate_project {
1104         my $input = shift || return undef;
1105         if (!validate_pathname($input) ||
1106                 !(-d "$projectroot/$input") ||
1107                 !check_export_ok("$projectroot/$input") ||
1108                 ($strict_export && !project_in_list($input))) {
1109                 return undef;
1110         } else {
1111                 return $input;
1112         }
1113 }
1114
1115 sub validate_pathname {
1116         my $input = shift || return undef;
1117
1118         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1119         # at the beginning, at the end, and between slashes.
1120         # also this catches doubled slashes
1121         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1122                 return undef;
1123         }
1124         # no null characters
1125         if ($input =~ m!\0!) {
1126                 return undef;
1127         }
1128         return $input;
1129 }
1130
1131 sub validate_refname {
1132         my $input = shift || return undef;
1133
1134         # textual hashes are O.K.
1135         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1136                 return $input;
1137         }
1138         # it must be correct pathname
1139         $input = validate_pathname($input)
1140                 or return undef;
1141         # restrictions on ref name according to git-check-ref-format
1142         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1143                 return undef;
1144         }
1145         return $input;
1146 }
1147
1148 # decode sequences of octets in utf8 into Perl's internal form,
1149 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1150 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1151 sub to_utf8 {
1152         my $str = shift;
1153         if (utf8::valid($str)) {
1154                 utf8::decode($str);
1155                 return $str;
1156         } else {
1157                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1158         }
1159 }
1160
1161 # quote unsafe chars, but keep the slash, even when it's not
1162 # correct, but quoted slashes look too horrible in bookmarks
1163 sub esc_param {
1164         my $str = shift;
1165         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1166         $str =~ s/ /\+/g;
1167         return $str;
1168 }
1169
1170 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1171 sub esc_url {
1172         my $str = shift;
1173         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1174         $str =~ s/\+/%2B/g;
1175         $str =~ s/ /\+/g;
1176         return $str;
1177 }
1178
1179 # quote unsafe characters in HTML attributes
1180 sub esc_attr {
1181
1182         # for XHTML conformance escaping '"' to '&quot;' is not enough
1183         return esc_html(@_);
1184 }
1185
1186 # replace invalid utf8 character with SUBSTITUTION sequence
1187 sub esc_html {
1188         my $str = shift;
1189         my %opts = @_;
1190
1191         $str = to_utf8($str);
1192         $str = $cgi->escapeHTML($str);
1193         if ($opts{'-nbsp'}) {
1194                 $str =~ s/ /&nbsp;/g;
1195         }
1196         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1197         return $str;
1198 }
1199
1200 # quote control characters and escape filename to HTML
1201 sub esc_path {
1202         my $str = shift;
1203         my %opts = @_;
1204
1205         $str = to_utf8($str);
1206         $str = $cgi->escapeHTML($str);
1207         if ($opts{'-nbsp'}) {
1208                 $str =~ s/ /&nbsp;/g;
1209         }
1210         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1211         return $str;
1212 }
1213
1214 # Make control characters "printable", using character escape codes (CEC)
1215 sub quot_cec {
1216         my $cntrl = shift;
1217         my %opts = @_;
1218         my %es = ( # character escape codes, aka escape sequences
1219                 "\t" => '\t',   # tab            (HT)
1220                 "\n" => '\n',   # line feed      (LF)
1221                 "\r" => '\r',   # carrige return (CR)
1222                 "\f" => '\f',   # form feed      (FF)
1223                 "\b" => '\b',   # backspace      (BS)
1224                 "\a" => '\a',   # alarm (bell)   (BEL)
1225                 "\e" => '\e',   # escape         (ESC)
1226                 "\013" => '\v', # vertical tab   (VT)
1227                 "\000" => '\0', # nul character  (NUL)
1228         );
1229         my $chr = ( (exists $es{$cntrl})
1230                     ? $es{$cntrl}
1231                     : sprintf('\%2x', ord($cntrl)) );
1232         if ($opts{-nohtml}) {
1233                 return $chr;
1234         } else {
1235                 return "<span class=\"cntrl\">$chr</span>";
1236         }
1237 }
1238
1239 # Alternatively use unicode control pictures codepoints,
1240 # Unicode "printable representation" (PR)
1241 sub quot_upr {
1242         my $cntrl = shift;
1243         my %opts = @_;
1244
1245         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1246         if ($opts{-nohtml}) {
1247                 return $chr;
1248         } else {
1249                 return "<span class=\"cntrl\">$chr</span>";
1250         }
1251 }
1252
1253 # git may return quoted and escaped filenames
1254 sub unquote {
1255         my $str = shift;
1256
1257         sub unq {
1258                 my $seq = shift;
1259                 my %es = ( # character escape codes, aka escape sequences
1260                         't' => "\t",   # tab            (HT, TAB)
1261                         'n' => "\n",   # newline        (NL)
1262                         'r' => "\r",   # return         (CR)
1263                         'f' => "\f",   # form feed      (FF)
1264                         'b' => "\b",   # backspace      (BS)
1265                         'a' => "\a",   # alarm (bell)   (BEL)
1266                         'e' => "\e",   # escape         (ESC)
1267                         'v' => "\013", # vertical tab   (VT)
1268                 );
1269
1270                 if ($seq =~ m/^[0-7]{1,3}$/) {
1271                         # octal char sequence
1272                         return chr(oct($seq));
1273                 } elsif (exists $es{$seq}) {
1274                         # C escape sequence, aka character escape code
1275                         return $es{$seq};
1276                 }
1277                 # quoted ordinary character
1278                 return $seq;
1279         }
1280
1281         if ($str =~ m/^"(.*)"$/) {
1282                 # needs unquoting
1283                 $str = $1;
1284                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1285         }
1286         return $str;
1287 }
1288
1289 # escape tabs (convert tabs to spaces)
1290 sub untabify {
1291         my $line = shift;
1292
1293         while ((my $pos = index($line, "\t")) != -1) {
1294                 if (my $count = (8 - ($pos % 8))) {
1295                         my $spaces = ' ' x $count;
1296                         $line =~ s/\t/$spaces/;
1297                 }
1298         }
1299
1300         return $line;
1301 }
1302
1303 sub project_in_list {
1304         my $project = shift;
1305         my @list = git_get_projects_list();
1306         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1307 }
1308
1309 ## ----------------------------------------------------------------------
1310 ## HTML aware string manipulation
1311
1312 # Try to chop given string on a word boundary between position
1313 # $len and $len+$add_len. If there is no word boundary there,
1314 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1315 # (marking chopped part) would be longer than given string.
1316 sub chop_str {
1317         my $str = shift;
1318         my $len = shift;
1319         my $add_len = shift || 10;
1320         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1321
1322         # Make sure perl knows it is utf8 encoded so we don't
1323         # cut in the middle of a utf8 multibyte char.
1324         $str = to_utf8($str);
1325
1326         # allow only $len chars, but don't cut a word if it would fit in $add_len
1327         # if it doesn't fit, cut it if it's still longer than the dots we would add
1328         # remove chopped character entities entirely
1329
1330         # when chopping in the middle, distribute $len into left and right part
1331         # return early if chopping wouldn't make string shorter
1332         if ($where eq 'center') {
1333                 return $str if ($len + 5 >= length($str)); # filler is length 5
1334                 $len = int($len/2);
1335         } else {
1336                 return $str if ($len + 4 >= length($str)); # filler is length 4
1337         }
1338
1339         # regexps: ending and beginning with word part up to $add_len
1340         my $endre = qr/.{$len}\w{0,$add_len}/;
1341         my $begre = qr/\w{0,$add_len}.{$len}/;
1342
1343         if ($where eq 'left') {
1344                 $str =~ m/^(.*?)($begre)$/;
1345                 my ($lead, $body) = ($1, $2);
1346                 if (length($lead) > 4) {
1347                         $lead = " ...";
1348                 }
1349                 return "$lead$body";
1350
1351         } elsif ($where eq 'center') {
1352                 $str =~ m/^($endre)(.*)$/;
1353                 my ($left, $str)  = ($1, $2);
1354                 $str =~ m/^(.*?)($begre)$/;
1355                 my ($mid, $right) = ($1, $2);
1356                 if (length($mid) > 5) {
1357                         $mid = " ... ";
1358                 }
1359                 return "$left$mid$right";
1360
1361         } else {
1362                 $str =~ m/^($endre)(.*)$/;
1363                 my $body = $1;
1364                 my $tail = $2;
1365                 if (length($tail) > 4) {
1366                         $tail = "... ";
1367                 }
1368                 return "$body$tail";
1369         }
1370 }
1371
1372 # takes the same arguments as chop_str, but also wraps a <span> around the
1373 # result with a title attribute if it does get chopped. Additionally, the
1374 # string is HTML-escaped.
1375 sub chop_and_escape_str {
1376         my ($str) = @_;
1377
1378         my $chopped = chop_str(@_);
1379         if ($chopped eq $str) {
1380                 return esc_html($chopped);
1381         } else {
1382                 $str =~ s/[[:cntrl:]]/?/g;
1383                 return $cgi->span({-title=>$str}, esc_html($chopped));
1384         }
1385 }
1386
1387 ## ----------------------------------------------------------------------
1388 ## functions returning short strings
1389
1390 # CSS class for given age value (in seconds)
1391 sub age_class {
1392         my $age = shift;
1393
1394         if (!defined $age) {
1395                 return "noage";
1396         } elsif ($age < 60*60*2) {
1397                 return "age0";
1398         } elsif ($age < 60*60*24*2) {
1399                 return "age1";
1400         } else {
1401                 return "age2";
1402         }
1403 }
1404
1405 # convert age in seconds to "nn units ago" string
1406 sub age_string {
1407         my $age = shift;
1408         my $age_str;
1409
1410         if ($age > 60*60*24*365*2) {
1411                 $age_str = (int $age/60/60/24/365);
1412                 $age_str .= " years ago";
1413         } elsif ($age > 60*60*24*(365/12)*2) {
1414                 $age_str = int $age/60/60/24/(365/12);
1415                 $age_str .= " months ago";
1416         } elsif ($age > 60*60*24*7*2) {
1417                 $age_str = int $age/60/60/24/7;
1418                 $age_str .= " weeks ago";
1419         } elsif ($age > 60*60*24*2) {
1420                 $age_str = int $age/60/60/24;
1421                 $age_str .= " days ago";
1422         } elsif ($age > 60*60*2) {
1423                 $age_str = int $age/60/60;
1424                 $age_str .= " hours ago";
1425         } elsif ($age > 60*2) {
1426                 $age_str = int $age/60;
1427                 $age_str .= " min ago";
1428         } elsif ($age > 2) {
1429                 $age_str = int $age;
1430                 $age_str .= " sec ago";
1431         } else {
1432                 $age_str .= " right now";
1433         }
1434         return $age_str;
1435 }
1436
1437 use constant {
1438         S_IFINVALID => 0030000,
1439         S_IFGITLINK => 0160000,
1440 };
1441
1442 # submodule/subproject, a commit object reference
1443 sub S_ISGITLINK {
1444         my $mode = shift;
1445
1446         return (($mode & S_IFMT) == S_IFGITLINK)
1447 }
1448
1449 # convert file mode in octal to symbolic file mode string
1450 sub mode_str {
1451         my $mode = oct shift;
1452
1453         if (S_ISGITLINK($mode)) {
1454                 return 'm---------';
1455         } elsif (S_ISDIR($mode & S_IFMT)) {
1456                 return 'drwxr-xr-x';
1457         } elsif (S_ISLNK($mode)) {
1458                 return 'lrwxrwxrwx';
1459         } elsif (S_ISREG($mode)) {
1460                 # git cares only about the executable bit
1461                 if ($mode & S_IXUSR) {
1462                         return '-rwxr-xr-x';
1463                 } else {
1464                         return '-rw-r--r--';
1465                 };
1466         } else {
1467                 return '----------';
1468         }
1469 }
1470
1471 # convert file mode in octal to file type string
1472 sub file_type {
1473         my $mode = shift;
1474
1475         if ($mode !~ m/^[0-7]+$/) {
1476                 return $mode;
1477         } else {
1478                 $mode = oct $mode;
1479         }
1480
1481         if (S_ISGITLINK($mode)) {
1482                 return "submodule";
1483         } elsif (S_ISDIR($mode & S_IFMT)) {
1484                 return "directory";
1485         } elsif (S_ISLNK($mode)) {
1486                 return "symlink";
1487         } elsif (S_ISREG($mode)) {
1488                 return "file";
1489         } else {
1490                 return "unknown";
1491         }
1492 }
1493
1494 # convert file mode in octal to file type description string
1495 sub file_type_long {
1496         my $mode = shift;
1497
1498         if ($mode !~ m/^[0-7]+$/) {
1499                 return $mode;
1500         } else {
1501                 $mode = oct $mode;
1502         }
1503
1504         if (S_ISGITLINK($mode)) {
1505                 return "submodule";
1506         } elsif (S_ISDIR($mode & S_IFMT)) {
1507                 return "directory";
1508         } elsif (S_ISLNK($mode)) {
1509                 return "symlink";
1510         } elsif (S_ISREG($mode)) {
1511                 if ($mode & S_IXUSR) {
1512                         return "executable";
1513                 } else {
1514                         return "file";
1515                 };
1516         } else {
1517                 return "unknown";
1518         }
1519 }
1520
1521
1522 ## ----------------------------------------------------------------------
1523 ## functions returning short HTML fragments, or transforming HTML fragments
1524 ## which don't belong to other sections
1525
1526 # format line of commit message.
1527 sub format_log_line_html {
1528         my $line = shift;
1529
1530         $line = esc_html($line, -nbsp=>1);
1531         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1532                 $cgi->a({-href => href(action=>"object", hash=>$1),
1533                                         -class => "text"}, $1);
1534         }eg;
1535
1536         return $line;
1537 }
1538
1539 # format marker of refs pointing to given object
1540
1541 # the destination action is chosen based on object type and current context:
1542 # - for annotated tags, we choose the tag view unless it's the current view
1543 #   already, in which case we go to shortlog view
1544 # - for other refs, we keep the current view if we're in history, shortlog or
1545 #   log view, and select shortlog otherwise
1546 sub format_ref_marker {
1547         my ($refs, $id) = @_;
1548         my $markers = '';
1549
1550         if (defined $refs->{$id}) {
1551                 foreach my $ref (@{$refs->{$id}}) {
1552                         # this code exploits the fact that non-lightweight tags are the
1553                         # only indirect objects, and that they are the only objects for which
1554                         # we want to use tag instead of shortlog as action
1555                         my ($type, $name) = qw();
1556                         my $indirect = ($ref =~ s/\^\{\}$//);
1557                         # e.g. tags/v2.6.11 or heads/next
1558                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1559                                 $type = $1;
1560                                 $name = $2;
1561                         } else {
1562                                 $type = "ref";
1563                                 $name = $ref;
1564                         }
1565
1566                         my $class = $type;
1567                         $class .= " indirect" if $indirect;
1568
1569                         my $dest_action = "shortlog";
1570
1571                         if ($indirect) {
1572                                 $dest_action = "tag" unless $action eq "tag";
1573                         } elsif ($action =~ /^(history|(short)?log)$/) {
1574                                 $dest_action = $action;
1575                         }
1576
1577                         my $dest = "";
1578                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1579                         $dest .= $ref;
1580
1581                         my $link = $cgi->a({
1582                                 -href => href(
1583                                         action=>$dest_action,
1584                                         hash=>$dest
1585                                 )}, $name);
1586
1587                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1588                                 $link . "</span>";
1589                 }
1590         }
1591
1592         if ($markers) {
1593                 return ' <span class="refs">'. $markers . '</span>';
1594         } else {
1595                 return "";
1596         }
1597 }
1598
1599 # format, perhaps shortened and with markers, title line
1600 sub format_subject_html {
1601         my ($long, $short, $href, $extra) = @_;
1602         $extra = '' unless defined($extra);
1603
1604         if (length($short) < length($long)) {
1605                 $long =~ s/[[:cntrl:]]/?/g;
1606                 return $cgi->a({-href => $href, -class => "list subject",
1607                                 -title => to_utf8($long)},
1608                        esc_html($short)) . $extra;
1609         } else {
1610                 return $cgi->a({-href => $href, -class => "list subject"},
1611                        esc_html($long)) . $extra;
1612         }
1613 }
1614
1615 # Rather than recomputing the url for an email multiple times, we cache it
1616 # after the first hit. This gives a visible benefit in views where the avatar
1617 # for the same email is used repeatedly (e.g. shortlog).
1618 # The cache is shared by all avatar engines (currently gravatar only), which
1619 # are free to use it as preferred. Since only one avatar engine is used for any
1620 # given page, there's no risk for cache conflicts.
1621 our %avatar_cache = ();
1622
1623 # Compute the picon url for a given email, by using the picon search service over at
1624 # http://www.cs.indiana.edu/picons/search.html
1625 sub picon_url {
1626         my $email = lc shift;
1627         if (!$avatar_cache{$email}) {
1628                 my ($user, $domain) = split('@', $email);
1629                 $avatar_cache{$email} =
1630                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1631                         "$domain/$user/" .
1632                         "users+domains+unknown/up/single";
1633         }
1634         return $avatar_cache{$email};
1635 }
1636
1637 # Compute the gravatar url for a given email, if it's not in the cache already.
1638 # Gravatar stores only the part of the URL before the size, since that's the
1639 # one computationally more expensive. This also allows reuse of the cache for
1640 # different sizes (for this particular engine).
1641 sub gravatar_url {
1642         my $email = lc shift;
1643         my $size = shift;
1644         $avatar_cache{$email} ||=
1645                 "http://www.gravatar.com/avatar/" .
1646                         Digest::MD5::md5_hex($email) . "?s=";
1647         return $avatar_cache{$email} . $size;
1648 }
1649
1650 # Insert an avatar for the given $email at the given $size if the feature
1651 # is enabled.
1652 sub git_get_avatar {
1653         my ($email, %opts) = @_;
1654         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1655         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1656         $opts{-size} ||= 'default';
1657         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1658         my $url = "";
1659         if ($git_avatar eq 'gravatar') {
1660                 $url = gravatar_url($email, $size);
1661         } elsif ($git_avatar eq 'picon') {
1662                 $url = picon_url($email);
1663         }
1664         # Other providers can be added by extending the if chain, defining $url
1665         # as needed. If no variant puts something in $url, we assume avatars
1666         # are completely disabled/unavailable.
1667         if ($url) {
1668                 return $pre_white .
1669                        "<img width=\"$size\" " .
1670                             "class=\"avatar\" " .
1671                             "src=\"".esc_url($url)."\" " .
1672                             "alt=\"\" " .
1673                        "/>" . $post_white;
1674         } else {
1675                 return "";
1676         }
1677 }
1678
1679 sub format_search_author {
1680         my ($author, $searchtype, $displaytext) = @_;
1681         my $have_search = gitweb_check_feature('search');
1682
1683         if ($have_search) {
1684                 my $performed = "";
1685                 if ($searchtype eq 'author') {
1686                         $performed = "authored";
1687                 } elsif ($searchtype eq 'committer') {
1688                         $performed = "committed";
1689                 }
1690
1691                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1692                                 searchtext=>$author,
1693                                 searchtype=>$searchtype), class=>"list",
1694                                 title=>"Search for commits $performed by $author"},
1695                                 $displaytext);
1696
1697         } else {
1698                 return $displaytext;
1699         }
1700 }
1701
1702 # format the author name of the given commit with the given tag
1703 # the author name is chopped and escaped according to the other
1704 # optional parameters (see chop_str).
1705 sub format_author_html {
1706         my $tag = shift;
1707         my $co = shift;
1708         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1709         return "<$tag class=\"author\">" .
1710                format_search_author($co->{'author_name'}, "author",
1711                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1712                        $author) .
1713                "</$tag>";
1714 }
1715
1716 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1717 sub format_git_diff_header_line {
1718         my $line = shift;
1719         my $diffinfo = shift;
1720         my ($from, $to) = @_;
1721
1722         if ($diffinfo->{'nparents'}) {
1723                 # combined diff
1724                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1725                 if ($to->{'href'}) {
1726                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1727                                          esc_path($to->{'file'}));
1728                 } else { # file was deleted (no href)
1729                         $line .= esc_path($to->{'file'});
1730                 }
1731         } else {
1732                 # "ordinary" diff
1733                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1734                 if ($from->{'href'}) {
1735                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1736                                          'a/' . esc_path($from->{'file'}));
1737                 } else { # file was added (no href)
1738                         $line .= 'a/' . esc_path($from->{'file'});
1739                 }
1740                 $line .= ' ';
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1743                                          'b/' . esc_path($to->{'file'}));
1744                 } else { # file was deleted
1745                         $line .= 'b/' . esc_path($to->{'file'});
1746                 }
1747         }
1748
1749         return "<div class=\"diff header\">$line</div>\n";
1750 }
1751
1752 # format extended diff header line, before patch itself
1753 sub format_extended_diff_header_line {
1754         my $line = shift;
1755         my $diffinfo = shift;
1756         my ($from, $to) = @_;
1757
1758         # match <path>
1759         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1760                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1761                                        esc_path($from->{'file'}));
1762         }
1763         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1764                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1765                                  esc_path($to->{'file'}));
1766         }
1767         # match single <mode>
1768         if ($line =~ m/\s(\d{6})$/) {
1769                 $line .= '<span class="info"> (' .
1770                          file_type_long($1) .
1771                          ')</span>';
1772         }
1773         # match <hash>
1774         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1775                 # can match only for combined diff
1776                 $line = 'index ';
1777                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1778                         if ($from->{'href'}[$i]) {
1779                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1780                                                   -class=>"hash"},
1781                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1782                         } else {
1783                                 $line .= '0' x 7;
1784                         }
1785                         # separator
1786                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1787                 }
1788                 $line .= '..';
1789                 if ($to->{'href'}) {
1790                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1791                                          substr($diffinfo->{'to_id'},0,7));
1792                 } else {
1793                         $line .= '0' x 7;
1794                 }
1795
1796         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1797                 # can match only for ordinary diff
1798                 my ($from_link, $to_link);
1799                 if ($from->{'href'}) {
1800                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1801                                              substr($diffinfo->{'from_id'},0,7));
1802                 } else {
1803                         $from_link = '0' x 7;
1804                 }
1805                 if ($to->{'href'}) {
1806                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1807                                            substr($diffinfo->{'to_id'},0,7));
1808                 } else {
1809                         $to_link = '0' x 7;
1810                 }
1811                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1812                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1813         }
1814
1815         return $line . "<br/>\n";
1816 }
1817
1818 # format from-file/to-file diff header
1819 sub format_diff_from_to_header {
1820         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1821         my $line;
1822         my $result = '';
1823
1824         $line = $from_line;
1825         #assert($line =~ m/^---/) if DEBUG;
1826         # no extra formatting for "^--- /dev/null"
1827         if (! $diffinfo->{'nparents'}) {
1828                 # ordinary (single parent) diff
1829                 if ($line =~ m!^--- "?a/!) {
1830                         if ($from->{'href'}) {
1831                                 $line = '--- a/' .
1832                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1833                                                 esc_path($from->{'file'}));
1834                         } else {
1835                                 $line = '--- a/' .
1836                                         esc_path($from->{'file'});
1837                         }
1838                 }
1839                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1840
1841         } else {
1842                 # combined diff (merge commit)
1843                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1844                         if ($from->{'href'}[$i]) {
1845                                 $line = '--- ' .
1846                                         $cgi->a({-href=>href(action=>"blobdiff",
1847                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1848                                                              hash_parent_base=>$parents[$i],
1849                                                              file_parent=>$from->{'file'}[$i],
1850                                                              hash=>$diffinfo->{'to_id'},
1851                                                              hash_base=>$hash,
1852                                                              file_name=>$to->{'file'}),
1853                                                  -class=>"path",
1854                                                  -title=>"diff" . ($i+1)},
1855                                                 $i+1) .
1856                                         '/' .
1857                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1858                                                 esc_path($from->{'file'}[$i]));
1859                         } else {
1860                                 $line = '--- /dev/null';
1861                         }
1862                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1863                 }
1864         }
1865
1866         $line = $to_line;
1867         #assert($line =~ m/^\+\+\+/) if DEBUG;
1868         # no extra formatting for "^+++ /dev/null"
1869         if ($line =~ m!^\+\+\+ "?b/!) {
1870                 if ($to->{'href'}) {
1871                         $line = '+++ b/' .
1872                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1873                                         esc_path($to->{'file'}));
1874                 } else {
1875                         $line = '+++ b/' .
1876                                 esc_path($to->{'file'});
1877                 }
1878         }
1879         $result .= qq!<div class="diff to_file">$line</div>\n!;
1880
1881         return $result;
1882 }
1883
1884 # create note for patch simplified by combined diff
1885 sub format_diff_cc_simplified {
1886         my ($diffinfo, @parents) = @_;
1887         my $result = '';
1888
1889         $result .= "<div class=\"diff header\">" .
1890                    "diff --cc ";
1891         if (!is_deleted($diffinfo)) {
1892                 $result .= $cgi->a({-href => href(action=>"blob",
1893                                                   hash_base=>$hash,
1894                                                   hash=>$diffinfo->{'to_id'},
1895                                                   file_name=>$diffinfo->{'to_file'}),
1896                                     -class => "path"},
1897                                    esc_path($diffinfo->{'to_file'}));
1898         } else {
1899                 $result .= esc_path($diffinfo->{'to_file'});
1900         }
1901         $result .= "</div>\n" . # class="diff header"
1902                    "<div class=\"diff nodifferences\">" .
1903                    "Simple merge" .
1904                    "</div>\n"; # class="diff nodifferences"
1905
1906         return $result;
1907 }
1908
1909 # format patch (diff) line (not to be used for diff headers)
1910 sub format_diff_line {
1911         my $line = shift;
1912         my ($from, $to) = @_;
1913         my $diff_class = "";
1914
1915         chomp $line;
1916
1917         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1918                 # combined diff
1919                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1920                 if ($line =~ m/^\@{3}/) {
1921                         $diff_class = " chunk_header";
1922                 } elsif ($line =~ m/^\\/) {
1923                         $diff_class = " incomplete";
1924                 } elsif ($prefix =~ tr/+/+/) {
1925                         $diff_class = " add";
1926                 } elsif ($prefix =~ tr/-/-/) {
1927                         $diff_class = " rem";
1928                 }
1929         } else {
1930                 # assume ordinary diff
1931                 my $char = substr($line, 0, 1);
1932                 if ($char eq '+') {
1933                         $diff_class = " add";
1934                 } elsif ($char eq '-') {
1935                         $diff_class = " rem";
1936                 } elsif ($char eq '@') {
1937                         $diff_class = " chunk_header";
1938                 } elsif ($char eq "\\") {
1939                         $diff_class = " incomplete";
1940                 }
1941         }
1942         $line = untabify($line);
1943         if ($from && $to && $line =~ m/^\@{2} /) {
1944                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1945                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1946
1947                 $from_lines = 0 unless defined $from_lines;
1948                 $to_lines   = 0 unless defined $to_lines;
1949
1950                 if ($from->{'href'}) {
1951                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1952                                              -class=>"list"}, $from_text);
1953                 }
1954                 if ($to->{'href'}) {
1955                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1956                                              -class=>"list"}, $to_text);
1957                 }
1958                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1959                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1960                 return "<div class=\"diff$diff_class\">$line</div>\n";
1961         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1962                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1963                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1964
1965                 @from_text = split(' ', $ranges);
1966                 for (my $i = 0; $i < @from_text; ++$i) {
1967                         ($from_start[$i], $from_nlines[$i]) =
1968                                 (split(',', substr($from_text[$i], 1)), 0);
1969                 }
1970
1971                 $to_text   = pop @from_text;
1972                 $to_start  = pop @from_start;
1973                 $to_nlines = pop @from_nlines;
1974
1975                 $line = "<span class=\"chunk_info\">$prefix ";
1976                 for (my $i = 0; $i < @from_text; ++$i) {
1977                         if ($from->{'href'}[$i]) {
1978                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1979                                                   -class=>"list"}, $from_text[$i]);
1980                         } else {
1981                                 $line .= $from_text[$i];
1982                         }
1983                         $line .= " ";
1984                 }
1985                 if ($to->{'href'}) {
1986                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1987                                           -class=>"list"}, $to_text);
1988                 } else {
1989                         $line .= $to_text;
1990                 }
1991                 $line .= " $prefix</span>" .
1992                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1993                 return "<div class=\"diff$diff_class\">$line</div>\n";
1994         }
1995         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1996 }
1997
1998 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1999 # linked.  Pass the hash of the tree/commit to snapshot.
2000 sub format_snapshot_links {
2001         my ($hash) = @_;
2002         my $num_fmts = @snapshot_fmts;
2003         if ($num_fmts > 1) {
2004                 # A parenthesized list of links bearing format names.
2005                 # e.g. "snapshot (_tar.gz_ _zip_)"
2006                 return "snapshot (" . join(' ', map
2007                         $cgi->a({
2008                                 -href => href(
2009                                         action=>"snapshot",
2010                                         hash=>$hash,
2011                                         snapshot_format=>$_
2012                                 )
2013                         }, $known_snapshot_formats{$_}{'display'})
2014                 , @snapshot_fmts) . ")";
2015         } elsif ($num_fmts == 1) {
2016                 # A single "snapshot" link whose tooltip bears the format name.
2017                 # i.e. "_snapshot_"
2018                 my ($fmt) = @snapshot_fmts;
2019                 return
2020                         $cgi->a({
2021                                 -href => href(
2022                                         action=>"snapshot",
2023                                         hash=>$hash,
2024                                         snapshot_format=>$fmt
2025                                 ),
2026                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2027                         }, "snapshot");
2028         } else { # $num_fmts == 0
2029                 return undef;
2030         }
2031 }
2032
2033 ## ......................................................................
2034 ## functions returning values to be passed, perhaps after some
2035 ## transformation, to other functions; e.g. returning arguments to href()
2036
2037 # returns hash to be passed to href to generate gitweb URL
2038 # in -title key it returns description of link
2039 sub get_feed_info {
2040         my $format = shift || 'Atom';
2041         my %res = (action => lc($format));
2042
2043         # feed links are possible only for project views
2044         return unless (defined $project);
2045         # some views should link to OPML, or to generic project feed,
2046         # or don't have specific feed yet (so they should use generic)
2047         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2048
2049         my $branch;
2050         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2051         # from tag links; this also makes possible to detect branch links
2052         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2053             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2054                 $branch = $1;
2055         }
2056         # find log type for feed description (title)
2057         my $type = 'log';
2058         if (defined $file_name) {
2059                 $type  = "history of $file_name";
2060                 $type .= "/" if ($action eq 'tree');
2061                 $type .= " on '$branch'" if (defined $branch);
2062         } else {
2063                 $type = "log of $branch" if (defined $branch);
2064         }
2065
2066         $res{-title} = $type;
2067         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2068         $res{'file_name'} = $file_name;
2069
2070         return %res;
2071 }
2072
2073 ## ----------------------------------------------------------------------
2074 ## git utility subroutines, invoking git commands
2075
2076 # returns path to the core git executable and the --git-dir parameter as list
2077 sub git_cmd {
2078         $number_of_git_cmds++;
2079         return $GIT, '--git-dir='.$git_dir;
2080 }
2081
2082 # quote the given arguments for passing them to the shell
2083 # quote_command("command", "arg 1", "arg with ' and ! characters")
2084 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2085 # Try to avoid using this function wherever possible.
2086 sub quote_command {
2087         return join(' ',
2088                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2089 }
2090
2091 # get HEAD ref of given project as hash
2092 sub git_get_head_hash {
2093         return git_get_full_hash(shift, 'HEAD');
2094 }
2095
2096 sub git_get_full_hash {
2097         return git_get_hash(@_);
2098 }
2099
2100 sub git_get_short_hash {
2101         return git_get_hash(@_, '--short=7');
2102 }
2103
2104 sub git_get_hash {
2105         my ($project, $hash, @options) = @_;
2106         my $o_git_dir = $git_dir;
2107         my $retval = undef;
2108         $git_dir = "$projectroot/$project";
2109         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2110             '--verify', '-q', @options, $hash) {
2111                 $retval = <$fd>;
2112                 chomp $retval if defined $retval;
2113                 close $fd;
2114         }
2115         if (defined $o_git_dir) {
2116                 $git_dir = $o_git_dir;
2117         }
2118         return $retval;
2119 }
2120
2121 # get type of given object
2122 sub git_get_type {
2123         my $hash = shift;
2124
2125         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2126         my $type = <$fd>;
2127         close $fd or return;
2128         chomp $type;
2129         return $type;
2130 }
2131
2132 # repository configuration
2133 our $config_file = '';
2134 our %config;
2135
2136 # store multiple values for single key as anonymous array reference
2137 # single values stored directly in the hash, not as [ <value> ]
2138 sub hash_set_multi {
2139         my ($hash, $key, $value) = @_;
2140
2141         if (!exists $hash->{$key}) {
2142                 $hash->{$key} = $value;
2143         } elsif (!ref $hash->{$key}) {
2144                 $hash->{$key} = [ $hash->{$key}, $value ];
2145         } else {
2146                 push @{$hash->{$key}}, $value;
2147         }
2148 }
2149
2150 # return hash of git project configuration
2151 # optionally limited to some section, e.g. 'gitweb'
2152 sub git_parse_project_config {
2153         my $section_regexp = shift;
2154         my %config;
2155
2156         local $/ = "\0";
2157
2158         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2159                 or return;
2160
2161         while (my $keyval = <$fh>) {
2162                 chomp $keyval;
2163                 my ($key, $value) = split(/\n/, $keyval, 2);
2164
2165                 hash_set_multi(\%config, $key, $value)
2166                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2167         }
2168         close $fh;
2169
2170         return %config;
2171 }
2172
2173 # convert config value to boolean: 'true' or 'false'
2174 # no value, number > 0, 'true' and 'yes' values are true
2175 # rest of values are treated as false (never as error)
2176 sub config_to_bool {
2177         my $val = shift;
2178
2179         return 1 if !defined $val;             # section.key
2180
2181         # strip leading and trailing whitespace
2182         $val =~ s/^\s+//;
2183         $val =~ s/\s+$//;
2184
2185         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2186                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2187 }
2188
2189 # convert config value to simple decimal number
2190 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2191 # to be multiplied by 1024, 1048576, or 1073741824
2192 sub config_to_int {
2193         my $val = shift;
2194
2195         # strip leading and trailing whitespace
2196         $val =~ s/^\s+//;
2197         $val =~ s/\s+$//;
2198
2199         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2200                 $unit = lc($unit);
2201                 # unknown unit is treated as 1
2202                 return $num * ($unit eq 'g' ? 1073741824 :
2203                                $unit eq 'm' ?    1048576 :
2204                                $unit eq 'k' ?       1024 : 1);
2205         }
2206         return $val;
2207 }
2208
2209 # convert config value to array reference, if needed
2210 sub config_to_multi {
2211         my $val = shift;
2212
2213         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2214 }
2215
2216 sub git_get_project_config {
2217         my ($key, $type) = @_;
2218
2219         return unless defined $git_dir;
2220
2221         # key sanity check
2222         return unless ($key);
2223         $key =~ s/^gitweb\.//;
2224         return if ($key =~ m/\W/);
2225
2226         # type sanity check
2227         if (defined $type) {
2228                 $type =~ s/^--//;
2229                 $type = undef
2230                         unless ($type eq 'bool' || $type eq 'int');
2231         }
2232
2233         # get config
2234         if (!defined $config_file ||
2235             $config_file ne "$git_dir/config") {
2236                 %config = git_parse_project_config('gitweb');
2237                 $config_file = "$git_dir/config";
2238         }
2239
2240         # check if config variable (key) exists
2241         return unless exists $config{"gitweb.$key"};
2242
2243         # ensure given type
2244         if (!defined $type) {
2245                 return $config{"gitweb.$key"};
2246         } elsif ($type eq 'bool') {
2247                 # backward compatibility: 'git config --bool' returns true/false
2248                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2249         } elsif ($type eq 'int') {
2250                 return config_to_int($config{"gitweb.$key"});
2251         }
2252         return $config{"gitweb.$key"};
2253 }
2254
2255 # get hash of given path at given ref
2256 sub git_get_hash_by_path {
2257         my $base = shift;
2258         my $path = shift || return undef;
2259         my $type = shift;
2260
2261         $path =~ s,/+$,,;
2262
2263         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2264                 or die_error(500, "Open git-ls-tree failed");
2265         my $line = <$fd>;
2266         close $fd or return undef;
2267
2268         if (!defined $line) {
2269                 # there is no tree or hash given by $path at $base
2270                 return undef;
2271         }
2272
2273         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2274         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2275         if (defined $type && $type ne $2) {
2276                 # type doesn't match
2277                 return undef;
2278         }
2279         return $3;
2280 }
2281
2282 # get path of entry with given hash at given tree-ish (ref)
2283 # used to get 'from' filename for combined diff (merge commit) for renames
2284 sub git_get_path_by_hash {
2285         my $base = shift || return;
2286         my $hash = shift || return;
2287
2288         local $/ = "\0";
2289
2290         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2291                 or return undef;
2292         while (my $line = <$fd>) {
2293                 chomp $line;
2294
2295                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2296                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2297                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2298                         close $fd;
2299                         return $1;
2300                 }
2301         }
2302         close $fd;
2303         return undef;
2304 }
2305
2306 ## ......................................................................
2307 ## git utility functions, directly accessing git repository
2308
2309 sub git_get_project_description {
2310         my $path = shift;
2311
2312         $git_dir = "$projectroot/$path";
2313         open my $fd, '<', "$git_dir/description"
2314                 or return git_get_project_config('description');
2315         my $descr = <$fd>;
2316         close $fd;
2317         if (defined $descr) {
2318                 chomp $descr;
2319         }
2320         return $descr;
2321 }
2322
2323 sub git_get_project_ctags {
2324         my $path = shift;
2325         my $ctags = {};
2326
2327         $git_dir = "$projectroot/$path";
2328         opendir my $dh, "$git_dir/ctags"
2329                 or return $ctags;
2330         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2331                 open my $ct, '<', $_ or next;
2332                 my $val = <$ct>;
2333                 chomp $val;
2334                 close $ct;
2335                 my $ctag = $_; $ctag =~ s#.*/##;
2336                 $ctags->{$ctag} = $val;
2337         }
2338         closedir $dh;
2339         $ctags;
2340 }
2341
2342 sub git_populate_project_tagcloud {
2343         my $ctags = shift;
2344
2345         # First, merge different-cased tags; tags vote on casing
2346         my %ctags_lc;
2347         foreach (keys %$ctags) {
2348                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2349                 if (not $ctags_lc{lc $_}->{topcount}
2350                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2351                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2352                         $ctags_lc{lc $_}->{topname} = $_;
2353                 }
2354         }
2355
2356         my $cloud;
2357         if (eval { require HTML::TagCloud; 1; }) {
2358                 $cloud = HTML::TagCloud->new;
2359                 foreach (sort keys %ctags_lc) {
2360                         # Pad the title with spaces so that the cloud looks
2361                         # less crammed.
2362                         my $title = $ctags_lc{$_}->{topname};
2363                         $title =~ s/ /&nbsp;/g;
2364                         $title =~ s/^/&nbsp;/g;
2365                         $title =~ s/$/&nbsp;/g;
2366                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2367                 }
2368         } else {
2369                 $cloud = \%ctags_lc;
2370         }
2371         $cloud;
2372 }
2373
2374 sub git_show_project_tagcloud {
2375         my ($cloud, $count) = @_;
2376         print STDERR ref($cloud)."..\n";
2377         if (ref $cloud eq 'HTML::TagCloud') {
2378                 return $cloud->html_and_css($count);
2379         } else {
2380                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2381                 return '<p align="center">' . join (', ', map {
2382                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2383                 } splice(@tags, 0, $count)) . '</p>';
2384         }
2385 }
2386
2387 sub git_get_project_url_list {
2388         my $path = shift;
2389
2390         $git_dir = "$projectroot/$path";
2391         open my $fd, '<', "$git_dir/cloneurl"
2392                 or return wantarray ?
2393                 @{ config_to_multi(git_get_project_config('url')) } :
2394                    config_to_multi(git_get_project_config('url'));
2395         my @git_project_url_list = map { chomp; $_ } <$fd>;
2396         close $fd;
2397
2398         return wantarray ? @git_project_url_list : \@git_project_url_list;
2399 }
2400
2401 sub git_get_projects_list {
2402         my ($filter) = @_;
2403         my @list;
2404
2405         $filter ||= '';
2406         $filter =~ s/\.git$//;
2407
2408         my $check_forks = gitweb_check_feature('forks');
2409
2410         if (-d $projects_list) {
2411                 # search in directory
2412                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2413                 # remove the trailing "/"
2414                 $dir =~ s!/+$!!;
2415                 my $pfxlen = length("$dir");
2416                 my $pfxdepth = ($dir =~ tr!/!!);
2417
2418                 File::Find::find({
2419                         follow_fast => 1, # follow symbolic links
2420                         follow_skip => 2, # ignore duplicates
2421                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2422                         wanted => sub {
2423                                 # skip project-list toplevel, if we get it.
2424                                 return if (m!^[/.]$!);
2425                                 # only directories can be git repositories
2426                                 return unless (-d $_);
2427                                 # don't traverse too deep (Find is super slow on os x)
2428                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2429                                         $File::Find::prune = 1;
2430                                         return;
2431                                 }
2432
2433                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2434                                 # we check related file in $projectroot
2435                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2436                                 if (check_export_ok("$projectroot/$path")) {
2437                                         push @list, { path => $path };
2438                                         $File::Find::prune = 1;
2439                                 }
2440                         },
2441                 }, "$dir");
2442
2443         } elsif (-f $projects_list) {
2444                 # read from file(url-encoded):
2445                 # 'git%2Fgit.git Linus+Torvalds'
2446                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2447                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2448                 my %paths;
2449                 open my $fd, '<', $projects_list or return;
2450         PROJECT:
2451                 while (my $line = <$fd>) {
2452                         chomp $line;
2453                         my ($path, $owner) = split ' ', $line;
2454                         $path = unescape($path);
2455                         $owner = unescape($owner);
2456                         if (!defined $path) {
2457                                 next;
2458                         }
2459                         if ($filter ne '') {
2460                                 # looking for forks;
2461                                 my $pfx = substr($path, 0, length($filter));
2462                                 if ($pfx ne $filter) {
2463                                         next PROJECT;
2464                                 }
2465                                 my $sfx = substr($path, length($filter));
2466                                 if ($sfx !~ /^\/.*\.git$/) {
2467                                         next PROJECT;
2468                                 }
2469                         } elsif ($check_forks) {
2470                         PATH:
2471                                 foreach my $filter (keys %paths) {
2472                                         # looking for forks;
2473                                         my $pfx = substr($path, 0, length($filter));
2474                                         if ($pfx ne $filter) {
2475                                                 next PATH;
2476                                         }
2477                                         my $sfx = substr($path, length($filter));
2478                                         if ($sfx !~ /^\/.*\.git$/) {
2479                                                 next PATH;
2480                                         }
2481                                         # is a fork, don't include it in
2482                                         # the list
2483                                         next PROJECT;
2484                                 }
2485                         }
2486                         if (check_export_ok("$projectroot/$path")) {
2487                                 my $pr = {
2488                                         path => $path,
2489                                         owner => to_utf8($owner),
2490                                 };
2491                                 push @list, $pr;
2492                                 (my $forks_path = $path) =~ s/\.git$//;
2493                                 $paths{$forks_path}++;
2494                         }
2495                 }
2496                 close $fd;
2497         }
2498         return @list;
2499 }
2500
2501 our $gitweb_project_owner = undef;
2502 sub git_get_project_list_from_file {
2503
2504         return if (defined $gitweb_project_owner);
2505
2506         $gitweb_project_owner = {};
2507         # read from file (url-encoded):
2508         # 'git%2Fgit.git Linus+Torvalds'
2509         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2510         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2511         if (-f $projects_list) {
2512                 open(my $fd, '<', $projects_list);
2513                 while (my $line = <$fd>) {
2514                         chomp $line;
2515                         my ($pr, $ow) = split ' ', $line;
2516                         $pr = unescape($pr);
2517                         $ow = unescape($ow);
2518                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2519                 }
2520                 close $fd;
2521         }
2522 }
2523
2524 sub git_get_project_owner {
2525         my $project = shift;
2526         my $owner;
2527
2528         return undef unless $project;
2529         $git_dir = "$projectroot/$project";
2530
2531         if (!defined $gitweb_project_owner) {
2532                 git_get_project_list_from_file();
2533         }
2534
2535         if (exists $gitweb_project_owner->{$project}) {
2536                 $owner = $gitweb_project_owner->{$project};
2537         }
2538         if (!defined $owner){
2539                 $owner = git_get_project_config('owner');
2540         }
2541         if (!defined $owner) {
2542                 $owner = get_file_owner("$git_dir");
2543         }
2544
2545         return $owner;
2546 }
2547
2548 sub git_get_last_activity {
2549         my ($path) = @_;
2550         my $fd;
2551
2552         $git_dir = "$projectroot/$path";
2553         open($fd, "-|", git_cmd(), 'for-each-ref',
2554              '--format=%(committer)',
2555              '--sort=-committerdate',
2556              '--count=1',
2557              'refs/heads') or return;
2558         my $most_recent = <$fd>;
2559         close $fd or return;
2560         if (defined $most_recent &&
2561             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2562                 my $timestamp = $1;
2563                 my $age = time - $timestamp;
2564                 return ($age, age_string($age));
2565         }
2566         return (undef, undef);
2567 }
2568
2569 sub git_get_references {
2570         my $type = shift || "";
2571         my %refs;
2572         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2573         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2574         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2575                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2576                 or return;
2577
2578         while (my $line = <$fd>) {
2579                 chomp $line;
2580                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2581                         if (defined $refs{$1}) {
2582                                 push @{$refs{$1}}, $2;
2583                         } else {
2584                                 $refs{$1} = [ $2 ];
2585                         }
2586                 }
2587         }
2588         close $fd or return;
2589         return \%refs;
2590 }
2591
2592 sub git_get_rev_name_tags {
2593         my $hash = shift || return undef;
2594
2595         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2596                 or return;
2597         my $name_rev = <$fd>;
2598         close $fd;
2599
2600         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2601                 return $1;
2602         } else {
2603                 # catches also '$hash undefined' output
2604                 return undef;
2605         }
2606 }
2607
2608 ## ----------------------------------------------------------------------
2609 ## parse to hash functions
2610
2611 sub parse_date {
2612         my $epoch = shift;
2613         my $tz = shift || "-0000";
2614
2615         my %date;
2616         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2617         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2618         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2619         $date{'hour'} = $hour;
2620         $date{'minute'} = $min;
2621         $date{'mday'} = $mday;
2622         $date{'day'} = $days[$wday];
2623         $date{'month'} = $months[$mon];
2624         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2625                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2626         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2627                              $mday, $months[$mon], $hour ,$min;
2628         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2629                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2630
2631         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2632         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2633         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2634         $date{'hour_local'} = $hour;
2635         $date{'minute_local'} = $min;
2636         $date{'tz_local'} = $tz;
2637         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2638                                   1900+$year, $mon+1, $mday,
2639                                   $hour, $min, $sec, $tz);
2640         return %date;
2641 }
2642
2643 sub parse_tag {
2644         my $tag_id = shift;
2645         my %tag;
2646         my @comment;
2647
2648         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2649         $tag{'id'} = $tag_id;
2650         while (my $line = <$fd>) {
2651                 chomp $line;
2652                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2653                         $tag{'object'} = $1;
2654                 } elsif ($line =~ m/^type (.+)$/) {
2655                         $tag{'type'} = $1;
2656                 } elsif ($line =~ m/^tag (.+)$/) {
2657                         $tag{'name'} = $1;
2658                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2659                         $tag{'author'} = $1;
2660                         $tag{'author_epoch'} = $2;
2661                         $tag{'author_tz'} = $3;
2662                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2663                                 $tag{'author_name'}  = $1;
2664                                 $tag{'author_email'} = $2;
2665                         } else {
2666                                 $tag{'author_name'} = $tag{'author'};
2667                         }
2668                 } elsif ($line =~ m/--BEGIN/) {
2669                         push @comment, $line;
2670                         last;
2671                 } elsif ($line eq "") {
2672                         last;
2673                 }
2674         }
2675         push @comment, <$fd>;
2676         $tag{'comment'} = \@comment;
2677         close $fd or return;
2678         if (!defined $tag{'name'}) {
2679                 return
2680         };
2681         return %tag
2682 }
2683
2684 sub parse_commit_text {
2685         my ($commit_text, $withparents) = @_;
2686         my @commit_lines = split '\n', $commit_text;
2687         my %co;
2688
2689         pop @commit_lines; # Remove '\0'
2690
2691         if (! @commit_lines) {
2692                 return;
2693         }
2694
2695         my $header = shift @commit_lines;
2696         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2697                 return;
2698         }
2699         ($co{'id'}, my @parents) = split ' ', $header;
2700         while (my $line = shift @commit_lines) {
2701                 last if $line eq "\n";
2702                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2703                         $co{'tree'} = $1;
2704                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2705                         push @parents, $1;
2706                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2707                         $co{'author'} = to_utf8($1);
2708                         $co{'author_epoch'} = $2;
2709                         $co{'author_tz'} = $3;
2710                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2711                                 $co{'author_name'}  = $1;
2712                                 $co{'author_email'} = $2;
2713                         } else {
2714                                 $co{'author_name'} = $co{'author'};
2715                         }
2716                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2717                         $co{'committer'} = to_utf8($1);
2718                         $co{'committer_epoch'} = $2;
2719                         $co{'committer_tz'} = $3;
2720                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2721                                 $co{'committer_name'}  = $1;
2722                                 $co{'committer_email'} = $2;
2723                         } else {
2724                                 $co{'committer_name'} = $co{'committer'};
2725                         }
2726                 }
2727         }
2728         if (!defined $co{'tree'}) {
2729                 return;
2730         };
2731         $co{'parents'} = \@parents;
2732         $co{'parent'} = $parents[0];
2733
2734         foreach my $title (@commit_lines) {
2735                 $title =~ s/^    //;
2736                 if ($title ne "") {
2737                         $co{'title'} = chop_str($title, 80, 5);
2738                         # remove leading stuff of merges to make the interesting part visible
2739                         if (length($title) > 50) {
2740                                 $title =~ s/^Automatic //;
2741                                 $title =~ s/^merge (of|with) /Merge ... /i;
2742                                 if (length($title) > 50) {
2743                                         $title =~ s/(http|rsync):\/\///;
2744                                 }
2745                                 if (length($title) > 50) {
2746                                         $title =~ s/(master|www|rsync)\.//;
2747                                 }
2748                                 if (length($title) > 50) {
2749                                         $title =~ s/kernel.org:?//;
2750                                 }
2751                                 if (length($title) > 50) {
2752                                         $title =~ s/\/pub\/scm//;
2753                                 }
2754                         }
2755                         $co{'title_short'} = chop_str($title, 50, 5);
2756                         last;
2757                 }
2758         }
2759         if (! defined $co{'title'} || $co{'title'} eq "") {
2760                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2761         }
2762         # remove added spaces
2763         foreach my $line (@commit_lines) {
2764                 $line =~ s/^    //;
2765         }
2766         $co{'comment'} = \@commit_lines;
2767
2768         my $age = time - $co{'committer_epoch'};
2769         $co{'age'} = $age;
2770         $co{'age_string'} = age_string($age);
2771         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2772         if ($age > 60*60*24*7*2) {
2773                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2774                 $co{'age_string_age'} = $co{'age_string'};
2775         } else {
2776                 $co{'age_string_date'} = $co{'age_string'};
2777                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2778         }
2779         return %co;
2780 }
2781
2782 sub parse_commit {
2783         my ($commit_id) = @_;
2784         my %co;
2785
2786         local $/ = "\0";
2787
2788         open my $fd, "-|", git_cmd(), "rev-list",
2789                 "--parents",
2790                 "--header",
2791                 "--max-count=1",
2792                 $commit_id,
2793                 "--",
2794                 or die_error(500, "Open git-rev-list failed");
2795         %co = parse_commit_text(<$fd>, 1);
2796         close $fd;
2797
2798         return %co;
2799 }
2800
2801 sub parse_commits {
2802         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2803         my @cos;
2804
2805         $maxcount ||= 1;
2806         $skip ||= 0;
2807
2808         local $/ = "\0";
2809
2810         open my $fd, "-|", git_cmd(), "rev-list",
2811                 "--header",
2812                 @args,
2813                 ("--max-count=" . $maxcount),
2814                 ("--skip=" . $skip),
2815                 @extra_options,
2816                 $commit_id,
2817                 "--",
2818                 ($filename ? ($filename) : ())
2819                 or die_error(500, "Open git-rev-list failed");
2820         while (my $line = <$fd>) {
2821                 my %co = parse_commit_text($line);
2822                 push @cos, \%co;
2823         }
2824         close $fd;
2825
2826         return wantarray ? @cos : \@cos;
2827 }
2828
2829 # parse line of git-diff-tree "raw" output
2830 sub parse_difftree_raw_line {
2831         my $line = shift;
2832         my %res;
2833
2834         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2835         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2836         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2837                 $res{'from_mode'} = $1;
2838                 $res{'to_mode'} = $2;
2839                 $res{'from_id'} = $3;
2840                 $res{'to_id'} = $4;
2841                 $res{'status'} = $5;
2842                 $res{'similarity'} = $6;
2843                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2844                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2845                 } else {
2846                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2847                 }
2848         }
2849         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2850         # combined diff (for merge commit)
2851         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2852                 $res{'nparents'}  = length($1);
2853                 $res{'from_mode'} = [ split(' ', $2) ];
2854                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2855                 $res{'from_id'} = [ split(' ', $3) ];
2856                 $res{'to_id'} = pop @{$res{'from_id'}};
2857                 $res{'status'} = [ split('', $4) ];
2858                 $res{'to_file'} = unquote($5);
2859         }
2860         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2861         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2862                 $res{'commit'} = $1;
2863         }
2864
2865         return wantarray ? %res : \%res;
2866 }
2867
2868 # wrapper: return parsed line of git-diff-tree "raw" output
2869 # (the argument might be raw line, or parsed info)
2870 sub parsed_difftree_line {
2871         my $line_or_ref = shift;
2872
2873         if (ref($line_or_ref) eq "HASH") {
2874                 # pre-parsed (or generated by hand)
2875                 return $line_or_ref;
2876         } else {
2877                 return parse_difftree_raw_line($line_or_ref);
2878         }
2879 }
2880
2881 # parse line of git-ls-tree output
2882 sub parse_ls_tree_line {
2883         my $line = shift;
2884         my %opts = @_;
2885         my %res;
2886
2887         if ($opts{'-l'}) {
2888                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2889                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2890
2891                 $res{'mode'} = $1;
2892                 $res{'type'} = $2;
2893                 $res{'hash'} = $3;
2894                 $res{'size'} = $4;
2895                 if ($opts{'-z'}) {
2896                         $res{'name'} = $5;
2897                 } else {
2898                         $res{'name'} = unquote($5);
2899                 }
2900         } else {
2901                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2902                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2903
2904                 $res{'mode'} = $1;
2905                 $res{'type'} = $2;
2906                 $res{'hash'} = $3;
2907                 if ($opts{'-z'}) {
2908                         $res{'name'} = $4;
2909                 } else {
2910                         $res{'name'} = unquote($4);
2911                 }
2912         }
2913
2914         return wantarray ? %res : \%res;
2915 }
2916
2917 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2918 sub parse_from_to_diffinfo {
2919         my ($diffinfo, $from, $to, @parents) = @_;
2920
2921         if ($diffinfo->{'nparents'}) {
2922                 # combined diff
2923                 $from->{'file'} = [];
2924                 $from->{'href'} = [];
2925                 fill_from_file_info($diffinfo, @parents)
2926                         unless exists $diffinfo->{'from_file'};
2927                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2928                         $from->{'file'}[$i] =
2929                                 defined $diffinfo->{'from_file'}[$i] ?
2930                                         $diffinfo->{'from_file'}[$i] :
2931                                         $diffinfo->{'to_file'};
2932                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2933                                 $from->{'href'}[$i] = href(action=>"blob",
2934                                                            hash_base=>$parents[$i],
2935                                                            hash=>$diffinfo->{'from_id'}[$i],
2936                                                            file_name=>$from->{'file'}[$i]);
2937                         } else {
2938                                 $from->{'href'}[$i] = undef;
2939                         }
2940                 }
2941         } else {
2942                 # ordinary (not combined) diff
2943                 $from->{'file'} = $diffinfo->{'from_file'};
2944                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2945                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2946                                                hash=>$diffinfo->{'from_id'},
2947                                                file_name=>$from->{'file'});
2948                 } else {
2949                         delete $from->{'href'};
2950                 }
2951         }
2952
2953         $to->{'file'} = $diffinfo->{'to_file'};
2954         if (!is_deleted($diffinfo)) { # file exists in result
2955                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2956                                      hash=>$diffinfo->{'to_id'},
2957                                      file_name=>$to->{'file'});
2958         } else {
2959                 delete $to->{'href'};
2960         }
2961 }
2962
2963 ## ......................................................................
2964 ## parse to array of hashes functions
2965
2966 sub git_get_heads_list {
2967         my $limit = shift;
2968         my @headslist;
2969
2970         open my $fd, '-|', git_cmd(), 'for-each-ref',
2971                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2972                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2973                 'refs/heads'
2974                 or return;
2975         while (my $line = <$fd>) {
2976                 my %ref_item;
2977
2978                 chomp $line;
2979                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2980                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2981                 my ($committer, $epoch, $tz) =
2982                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2983                 $ref_item{'fullname'}  = $name;
2984                 $name =~ s!^refs/heads/!!;
2985
2986                 $ref_item{'name'}  = $name;
2987                 $ref_item{'id'}    = $hash;
2988                 $ref_item{'title'} = $title || '(no commit message)';
2989                 $ref_item{'epoch'} = $epoch;
2990                 if ($epoch) {
2991                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2992                 } else {
2993                         $ref_item{'age'} = "unknown";
2994                 }
2995
2996                 push @headslist, \%ref_item;
2997         }
2998         close $fd;
2999
3000         return wantarray ? @headslist : \@headslist;
3001 }
3002
3003 sub git_get_tags_list {
3004         my $limit = shift;
3005         my @tagslist;
3006
3007         open my $fd, '-|', git_cmd(), 'for-each-ref',
3008                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3009                 '--format=%(objectname) %(objecttype) %(refname) '.
3010                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3011                 'refs/tags'
3012                 or return;
3013         while (my $line = <$fd>) {
3014                 my %ref_item;
3015
3016                 chomp $line;
3017                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3018                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3019                 my ($creator, $epoch, $tz) =
3020                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3021                 $ref_item{'fullname'} = $name;
3022                 $name =~ s!^refs/tags/!!;
3023
3024                 $ref_item{'type'} = $type;
3025                 $ref_item{'id'} = $id;
3026                 $ref_item{'name'} = $name;
3027                 if ($type eq "tag") {
3028                         $ref_item{'subject'} = $title;
3029                         $ref_item{'reftype'} = $reftype;
3030                         $ref_item{'refid'}   = $refid;
3031                 } else {
3032                         $ref_item{'reftype'} = $type;
3033                         $ref_item{'refid'}   = $id;
3034                 }
3035
3036                 if ($type eq "tag" || $type eq "commit") {
3037                         $ref_item{'epoch'} = $epoch;
3038                         if ($epoch) {
3039                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3040                         } else {
3041                                 $ref_item{'age'} = "unknown";
3042                         }
3043                 }
3044
3045                 push @tagslist, \%ref_item;
3046         }
3047         close $fd;
3048
3049         return wantarray ? @tagslist : \@tagslist;
3050 }
3051
3052 ## ----------------------------------------------------------------------
3053 ## filesystem-related functions
3054
3055 sub get_file_owner {
3056         my $path = shift;
3057
3058         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3059         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3060         if (!defined $gcos) {
3061                 return undef;
3062         }
3063         my $owner = $gcos;
3064         $owner =~ s/[,;].*$//;
3065         return to_utf8($owner);
3066 }
3067
3068 # assume that file exists
3069 sub insert_file {
3070         my $filename = shift;
3071
3072         open my $fd, '<', $filename;
3073         print map { to_utf8($_) } <$fd>;
3074         close $fd;
3075 }
3076
3077 ## ......................................................................
3078 ## mimetype related functions
3079
3080 sub mimetype_guess_file {
3081         my $filename = shift;
3082         my $mimemap = shift;
3083         -r $mimemap or return undef;
3084
3085         my %mimemap;
3086         open(my $mh, '<', $mimemap) or return undef;
3087         while (<$mh>) {
3088                 next if m/^#/; # skip comments
3089                 my ($mimetype, $exts) = split(/\t+/);
3090                 if (defined $exts) {
3091                         my @exts = split(/\s+/, $exts);
3092                         foreach my $ext (@exts) {
3093                                 $mimemap{$ext} = $mimetype;
3094                         }
3095                 }
3096         }
3097         close($mh);
3098
3099         $filename =~ /\.([^.]*)$/;
3100         return $mimemap{$1};
3101 }
3102
3103 sub mimetype_guess {
3104         my $filename = shift;
3105         my $mime;
3106         $filename =~ /\./ or return undef;
3107
3108         if ($mimetypes_file) {
3109                 my $file = $mimetypes_file;
3110                 if ($file !~ m!^/!) { # if it is relative path
3111                         # it is relative to project
3112                         $file = "$projectroot/$project/$file";
3113                 }
3114                 $mime = mimetype_guess_file($filename, $file);
3115         }
3116         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3117         return $mime;
3118 }
3119
3120 sub blob_mimetype {
3121         my $fd = shift;
3122         my $filename = shift;
3123
3124         if ($filename) {
3125                 my $mime = mimetype_guess($filename);
3126                 $mime and return $mime;
3127         }
3128
3129         # just in case
3130         return $default_blob_plain_mimetype unless $fd;
3131
3132         if (-T $fd) {
3133                 return 'text/plain';
3134         } elsif (! $filename) {
3135                 return 'application/octet-stream';
3136         } elsif ($filename =~ m/\.png$/i) {
3137                 return 'image/png';
3138         } elsif ($filename =~ m/\.gif$/i) {
3139                 return 'image/gif';
3140         } elsif ($filename =~ m/\.jpe?g$/i) {
3141                 return 'image/jpeg';
3142         } else {
3143                 return 'application/octet-stream';
3144         }
3145 }
3146
3147 sub blob_contenttype {
3148         my ($fd, $file_name, $type) = @_;
3149
3150         $type ||= blob_mimetype($fd, $file_name);
3151         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3152                 $type .= "; charset=$default_text_plain_charset";
3153         }
3154
3155         return $type;
3156 }
3157
3158 ## ======================================================================
3159 ## functions printing HTML: header, footer, error page
3160
3161 sub git_header_html {
3162         my $status = shift || "200 OK";
3163         my $expires = shift;
3164
3165         my $title = "$site_name";
3166         if (defined $project) {
3167                 $title .= " - " . to_utf8($project);
3168                 if (defined $action) {
3169                         $title .= "/$action";
3170                         if (defined $file_name) {
3171                                 $title .= " - " . esc_path($file_name);
3172                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3173                                         $title .= "/";
3174                                 }
3175                         }
3176                 }
3177         }
3178         my $content_type;
3179         # require explicit support from the UA if we are to send the page as
3180         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3181         # we have to do this because MSIE sometimes globs '*/*', pretending to
3182         # support xhtml+xml but choking when it gets what it asked for.
3183         if (defined $cgi->http('HTTP_ACCEPT') &&
3184             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3185             $cgi->Accept('application/xhtml+xml') != 0) {
3186                 $content_type = 'application/xhtml+xml';
3187         } else {
3188                 $content_type = 'text/html';
3189         }
3190         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3191                            -status=> $status, -expires => $expires);
3192         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3193         print <<EOF;
3194 <?xml version="1.0" encoding="utf-8"?>
3195 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3196 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3197 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3198 <!-- git core binaries version $git_version -->
3199 <head>
3200 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3201 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3202 <meta name="robots" content="index, nofollow"/>
3203 <title>$title</title>
3204 EOF
3205         # the stylesheet, favicon etc urls won't work correctly with path_info
3206         # unless we set the appropriate base URL
3207         if ($ENV{'PATH_INFO'}) {
3208                 print "<base href=\"".esc_url($base_url)."\" />\n";
3209         }
3210         # print out each stylesheet that exist, providing backwards capability
3211         # for those people who defined $stylesheet in a config file
3212         if (defined $stylesheet) {
3213                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3214         } else {
3215                 foreach my $stylesheet (@stylesheets) {
3216                         next unless $stylesheet;
3217                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3218                 }
3219         }
3220         if (defined $project) {
3221                 my %href_params = get_feed_info();
3222                 if (!exists $href_params{'-title'}) {
3223                         $href_params{'-title'} = 'log';
3224                 }
3225
3226                 foreach my $format qw(RSS Atom) {
3227                         my $type = lc($format);
3228                         my %link_attr = (
3229                                 '-rel' => 'alternate',
3230                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3231                                 '-type' => "application/$type+xml"
3232                         );
3233
3234                         $href_params{'action'} = $type;
3235                         $link_attr{'-href'} = href(%href_params);
3236                         print "<link ".
3237                               "rel=\"$link_attr{'-rel'}\" ".
3238                               "title=\"$link_attr{'-title'}\" ".
3239                               "href=\"$link_attr{'-href'}\" ".
3240                               "type=\"$link_attr{'-type'}\" ".
3241                               "/>\n";
3242
3243                         $href_params{'extra_options'} = '--no-merges';
3244                         $link_attr{'-href'} = href(%href_params);
3245                         $link_attr{'-title'} .= ' (no merges)';
3246                         print "<link ".
3247                               "rel=\"$link_attr{'-rel'}\" ".
3248                               "title=\"$link_attr{'-title'}\" ".
3249                               "href=\"$link_attr{'-href'}\" ".
3250                               "type=\"$link_attr{'-type'}\" ".
3251                               "/>\n";
3252                 }
3253
3254         } else {
3255                 printf('<link rel="alternate" title="%s projects list" '.
3256                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3257                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3258                 printf('<link rel="alternate" title="%s projects feeds" '.
3259                        'href="%s" type="text/x-opml" />'."\n",
3260                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3261         }
3262         if (defined $favicon) {
3263                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3264         }
3265
3266         print "</head>\n" .
3267               "<body>\n";
3268
3269         if (defined $site_header && -f $site_header) {
3270                 insert_file($site_header);
3271         }
3272
3273         print "<div class=\"page_header\">\n" .
3274               $cgi->a({-href => esc_url($logo_url),
3275                        -title => $logo_label},
3276                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3277         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3278         if (defined $project) {
3279                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3280                 if (defined $action) {
3281                         print " / $action";
3282                 }
3283                 print "\n";
3284         }
3285         print "</div>\n";
3286
3287         my $have_search = gitweb_check_feature('search');
3288         if (defined $project && $have_search) {
3289                 if (!defined $searchtext) {
3290                         $searchtext = "";
3291                 }
3292                 my $search_hash;
3293                 if (defined $hash_base) {
3294                         $search_hash = $hash_base;
3295                 } elsif (defined $hash) {
3296                         $search_hash = $hash;
3297                 } else {
3298                         $search_hash = "HEAD";
3299                 }
3300                 my $action = $my_uri;
3301                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3302                 if ($use_pathinfo) {
3303                         $action .= "/".esc_url($project);
3304                 }
3305                 print $cgi->startform(-method => "get", -action => $action) .
3306                       "<div class=\"search\">\n" .
3307                       (!$use_pathinfo &&
3308                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3309                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3310                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3311                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3312                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3313                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3314                       " search:\n",
3315                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3316                       "<span title=\"Extended regular expression\">" .
3317                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3318                                      -checked => $search_use_regexp) .
3319                       "</span>" .
3320                       "</div>" .
3321                       $cgi->end_form() . "\n";
3322         }
3323 }
3324
3325 sub git_footer_html {
3326         my $feed_class = 'rss_logo';
3327
3328         print "<div class=\"page_footer\">\n";
3329         if (defined $project) {
3330                 my $descr = git_get_project_description($project);
3331                 if (defined $descr) {
3332                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3333                 }
3334
3335                 my %href_params = get_feed_info();
3336                 if (!%href_params) {
3337                         $feed_class .= ' generic';
3338                 }
3339                 $href_params{'-title'} ||= 'log';
3340
3341                 foreach my $format qw(RSS Atom) {
3342                         $href_params{'action'} = lc($format);
3343                         print $cgi->a({-href => href(%href_params),
3344                                       -title => "$href_params{'-title'} $format feed",
3345                                       -class => $feed_class}, $format)."\n";
3346                 }
3347
3348         } else {
3349                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3350                               -class => $feed_class}, "OPML") . " ";
3351                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3352                               -class => $feed_class}, "TXT") . "\n";
3353         }
3354         print "</div>\n"; # class="page_footer"
3355
3356         if (defined $t0 && gitweb_check_feature('timed')) {
3357                 print "<div id=\"generating_info\">\n";
3358                 print 'This page took '.
3359                       '<span id="generating_time" class="time_span">'.
3360                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3361                       ' seconds </span>'.
3362                       ' and '.
3363                       '<span id="generating_cmd">'.
3364                       $number_of_git_cmds.
3365                       '</span> git commands '.
3366                       " to generate.\n";
3367                 print "</div>\n"; # class="page_footer"
3368         }
3369
3370         if (defined $site_footer && -f $site_footer) {
3371                 insert_file($site_footer);
3372         }
3373
3374         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3375         if (defined $action &&
3376             $action eq 'blame_incremental') {
3377                 print qq!<script type="text/javascript">\n!.
3378                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3379                       qq!           "!. href() .qq!");\n!.
3380                       qq!</script>\n!;
3381         } elsif (gitweb_check_feature('javascript-actions')) {
3382                 print qq!<script type="text/javascript">\n!.
3383                       qq!window.onload = fixLinks;\n!.
3384                       qq!</script>\n!;
3385         }
3386
3387         print "</body>\n" .
3388               "</html>";
3389 }
3390
3391 # die_error(<http_status_code>, <error_message>)
3392 # Example: die_error(404, 'Hash not found')
3393 # By convention, use the following status codes (as defined in RFC 2616):
3394 # 400: Invalid or missing CGI parameters, or
3395 #      requested object exists but has wrong type.
3396 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3397 #      this server or project.
3398 # 404: Requested object/revision/project doesn't exist.
3399 # 500: The server isn't configured properly, or
3400 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3401 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3402 # 503: The server is currently unavailable (because it is overloaded,
3403 #      or down for maintenance).  Generally, this is a temporary state.
3404 sub die_error {
3405         my $status = shift || 500;
3406         my $error = shift || "Internal server error";
3407         my $extra = shift;
3408
3409         my %http_responses = (
3410                 400 => '400 Bad Request',
3411                 403 => '403 Forbidden',
3412                 404 => '404 Not Found',
3413                 500 => '500 Internal Server Error',
3414                 503 => '503 Service Unavailable',
3415         );
3416         git_header_html($http_responses{$status});
3417         print <<EOF;
3418 <div class="page_body">
3419 <br /><br />
3420 $status - $error
3421 <br />
3422 EOF
3423         if (defined $extra) {
3424                 print "<hr />\n" .
3425                       "$extra\n";
3426         }
3427         print "</div>\n";
3428
3429         git_footer_html();
3430         exit;
3431 }
3432
3433 ## ----------------------------------------------------------------------
3434 ## functions printing or outputting HTML: navigation
3435
3436 sub git_print_page_nav {
3437         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3438         $extra = '' if !defined $extra; # pager or formats
3439
3440         my @navs = qw(summary shortlog log commit commitdiff tree);
3441         if ($suppress) {
3442                 @navs = grep { $_ ne $suppress } @navs;
3443         }
3444
3445         my %arg = map { $_ => {action=>$_} } @navs;
3446         if (defined $head) {
3447                 for (qw(commit commitdiff)) {
3448                         $arg{$_}{'hash'} = $head;
3449                 }
3450                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3451                         for (qw(shortlog log)) {
3452                                 $arg{$_}{'hash'} = $head;
3453                         }
3454                 }
3455         }
3456
3457         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3458         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3459
3460         my @actions = gitweb_get_feature('actions');
3461         my %repl = (
3462                 '%' => '%',
3463                 'n' => $project,         # project name
3464                 'f' => $git_dir,         # project path within filesystem
3465                 'h' => $treehead || '',  # current hash ('h' parameter)
3466                 'b' => $treebase || '',  # hash base ('hb' parameter)
3467         );
3468         while (@actions) {
3469                 my ($label, $link, $pos) = splice(@actions,0,3);
3470                 # insert
3471                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3472                 # munch munch
3473                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3474                 $arg{$label}{'_href'} = $link;
3475         }
3476
3477         print "<div class=\"page_nav\">\n" .
3478                 (join " | ",
3479                  map { $_ eq $current ?
3480                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3481                  } @navs);
3482         print "<br/>\n$extra<br/>\n" .
3483               "</div>\n";
3484 }
3485
3486 sub format_paging_nav {
3487         my ($action, $page, $has_next_link) = @_;
3488         my $paging_nav;
3489
3490
3491         if ($page > 0) {
3492                 $paging_nav .=
3493                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3494                         " &sdot; " .
3495                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3496                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3497         } else {
3498                 $paging_nav .= "first &sdot; prev";
3499         }
3500
3501         if ($has_next_link) {
3502                 $paging_nav .= " &sdot; " .
3503                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3504                                  -accesskey => "n", -title => "Alt-n"}, "next");
3505         } else {
3506                 $paging_nav .= " &sdot; next";
3507         }
3508
3509         return $paging_nav;
3510 }
3511
3512 ## ......................................................................
3513 ## functions printing or outputting HTML: div
3514
3515 sub git_print_header_div {
3516         my ($action, $title, $hash, $hash_base) = @_;
3517         my %args = ();
3518
3519         $args{'action'} = $action;
3520         $args{'hash'} = $hash if $hash;
3521         $args{'hash_base'} = $hash_base if $hash_base;
3522
3523         print "<div class=\"header\">\n" .
3524               $cgi->a({-href => href(%args), -class => "title"},
3525               $title ? $title : $action) .
3526               "\n</div>\n";
3527 }
3528
3529 sub print_local_time {
3530         print format_local_time(@_);
3531 }
3532
3533 sub format_local_time {
3534         my $localtime = '';
3535         my %date = @_;
3536         if ($date{'hour_local'} < 6) {
3537                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3538                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3539         } else {
3540                 $localtime .= sprintf(" (%02d:%02d %s)",
3541                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3542         }
3543
3544         return $localtime;
3545 }
3546
3547 # Outputs the author name and date in long form
3548 sub git_print_authorship {
3549         my $co = shift;
3550         my %opts = @_;
3551         my $tag = $opts{-tag} || 'div';
3552         my $author = $co->{'author_name'};
3553
3554         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3555         print "<$tag class=\"author_date\">" .
3556               format_search_author($author, "author", esc_html($author)) .
3557               " [$ad{'rfc2822'}";
3558         print_local_time(%ad) if ($opts{-localtime});
3559         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3560                   . "</$tag>\n";
3561 }
3562
3563 # Outputs table rows containing the full author or committer information,
3564 # in the format expected for 'commit' view (& similia).
3565 # Parameters are a commit hash reference, followed by the list of people
3566 # to output information for. If the list is empty it defalts to both
3567 # author and committer.
3568 sub git_print_authorship_rows {
3569         my $co = shift;
3570         # too bad we can't use @people = @_ || ('author', 'committer')
3571         my @people = @_;
3572         @people = ('author', 'committer') unless @people;
3573         foreach my $who (@people) {
3574                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3575                 print "<tr><td>$who</td><td>" .
3576                       format_search_author($co->{"${who}_name"}, $who,
3577                                esc_html($co->{"${who}_name"})) . " " .
3578                       format_search_author($co->{"${who}_email"}, $who,
3579                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3580                       "</td><td rowspan=\"2\">" .
3581                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3582                       "</td></tr>\n" .
3583                       "<tr>" .
3584                       "<td></td><td> $wd{'rfc2822'}";
3585                 print_local_time(%wd);
3586                 print "</td>" .
3587                       "</tr>\n";
3588         }
3589 }
3590
3591 sub git_print_page_path {
3592         my $name = shift;
3593         my $type = shift;
3594         my $hb = shift;
3595
3596
3597         print "<div class=\"page_path\">";
3598         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3599                       -title => 'tree root'}, to_utf8("[$project]"));
3600         print " / ";
3601         if (defined $name) {
3602                 my @dirname = split '/', $name;
3603                 my $basename = pop @dirname;
3604                 my $fullname = '';
3605
3606                 foreach my $dir (@dirname) {
3607                         $fullname .= ($fullname ? '/' : '') . $dir;
3608                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3609                                                      hash_base=>$hb),
3610                                       -title => $fullname}, esc_path($dir));
3611                         print " / ";
3612                 }
3613                 if (defined $type && $type eq 'blob') {
3614                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3615                                                      hash_base=>$hb),
3616                                       -title => $name}, esc_path($basename));
3617                 } elsif (defined $type && $type eq 'tree') {
3618                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3619                                                      hash_base=>$hb),
3620                                       -title => $name}, esc_path($basename));
3621                         print " / ";
3622                 } else {
3623                         print esc_path($basename);
3624                 }
3625         }
3626         print "<br/></div>\n";
3627 }
3628
3629 sub git_print_log {
3630         my $log = shift;
3631         my %opts = @_;
3632
3633         if ($opts{'-remove_title'}) {
3634                 # remove title, i.e. first line of log
3635                 shift @$log;
3636         }
3637         # remove leading empty lines
3638         while (defined $log->[0] && $log->[0] eq "") {
3639                 shift @$log;
3640         }
3641
3642         # print log
3643         my $signoff = 0;
3644         my $empty = 0;
3645         foreach my $line (@$log) {
3646                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3647                         $signoff = 1;
3648                         $empty = 0;
3649                         if (! $opts{'-remove_signoff'}) {
3650                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3651                                 next;
3652                         } else {
3653                                 # remove signoff lines
3654                                 next;
3655                         }
3656                 } else {
3657                         $signoff = 0;
3658                 }
3659
3660                 # print only one empty line
3661                 # do not print empty line after signoff
3662                 if ($line eq "") {
3663                         next if ($empty || $signoff);
3664                         $empty = 1;
3665                 } else {
3666                         $empty = 0;
3667                 }
3668
3669                 print format_log_line_html($line) . "<br/>\n";
3670         }
3671
3672         if ($opts{'-final_empty_line'}) {
3673                 # end with single empty line
3674                 print "<br/>\n" unless $empty;
3675         }
3676 }
3677
3678 # return link target (what link points to)
3679 sub git_get_link_target {
3680         my $hash = shift;
3681         my $link_target;
3682
3683         # read link
3684         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3685                 or return;
3686         {
3687                 local $/ = undef;
3688                 $link_target = <$fd>;
3689         }
3690         close $fd
3691                 or return;
3692
3693         return $link_target;
3694 }
3695
3696 # given link target, and the directory (basedir) the link is in,
3697 # return target of link relative to top directory (top tree);
3698 # return undef if it is not possible (including absolute links).
3699 sub normalize_link_target {
3700         my ($link_target, $basedir) = @_;
3701
3702         # absolute symlinks (beginning with '/') cannot be normalized
3703         return if (substr($link_target, 0, 1) eq '/');
3704
3705         # normalize link target to path from top (root) tree (dir)
3706         my $path;
3707         if ($basedir) {
3708                 $path = $basedir . '/' . $link_target;
3709         } else {
3710                 # we are in top (root) tree (dir)
3711                 $path = $link_target;
3712         }
3713
3714         # remove //, /./, and /../
3715         my @path_parts;
3716         foreach my $part (split('/', $path)) {
3717                 # discard '.' and ''
3718                 next if (!$part || $part eq '.');
3719                 # handle '..'
3720                 if ($part eq '..') {
3721                         if (@path_parts) {
3722                                 pop @path_parts;
3723                         } else {
3724                                 # link leads outside repository (outside top dir)
3725                                 return;
3726                         }
3727                 } else {
3728                         push @path_parts, $part;
3729                 }
3730         }
3731         $path = join('/', @path_parts);
3732
3733         return $path;
3734 }
3735
3736 # print tree entry (row of git_tree), but without encompassing <tr> element
3737 sub git_print_tree_entry {
3738         my ($t, $basedir, $hash_base, $have_blame) = @_;
3739
3740         my %base_key = ();
3741         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3742
3743         # The format of a table row is: mode list link.  Where mode is
3744         # the mode of the entry, list is the name of the entry, an href,
3745         # and link is the action links of the entry.
3746
3747         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3748         if (exists $t->{'size'}) {
3749                 print "<td class=\"size\">$t->{'size'}</td>\n";
3750         }
3751         if ($t->{'type'} eq "blob") {
3752                 print "<td class=\"list\">" .
3753                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3754                                                file_name=>"$basedir$t->{'name'}", %base_key),
3755                                 -class => "list"}, esc_path($t->{'name'}));
3756                 if (S_ISLNK(oct $t->{'mode'})) {
3757                         my $link_target = git_get_link_target($t->{'hash'});
3758                         if ($link_target) {
3759                                 my $norm_target = normalize_link_target($link_target, $basedir);
3760                                 if (defined $norm_target) {
3761                                         print " -> " .
3762                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3763                                                                      file_name=>$norm_target),
3764                                                        -title => $norm_target}, esc_path($link_target));
3765                                 } else {
3766                                         print " -> " . esc_path($link_target);
3767                                 }
3768                         }
3769                 }
3770                 print "</td>\n";
3771                 print "<td class=\"link\">";
3772                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3773                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3774                               "blob");
3775                 if ($have_blame) {
3776                         print " | " .
3777                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3778                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3779                                       "blame");
3780                 }
3781                 if (defined $hash_base) {
3782                         print " | " .
3783                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3784                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3785                                       "history");
3786                 }
3787                 print " | " .
3788                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3789                                                file_name=>"$basedir$t->{'name'}")},
3790                                 "raw");
3791                 print "</td>\n";
3792
3793         } elsif ($t->{'type'} eq "tree") {
3794                 print "<td class=\"list\">";
3795                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3796                                              file_name=>"$basedir$t->{'name'}",
3797                                              %base_key)},
3798                               esc_path($t->{'name'}));
3799                 print "</td>\n";
3800                 print "<td class=\"link\">";
3801                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3802                                              file_name=>"$basedir$t->{'name'}",
3803                                              %base_key)},
3804                               "tree");
3805                 if (defined $hash_base) {
3806                         print " | " .
3807                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3808                                                      file_name=>"$basedir$t->{'name'}")},
3809                                       "history");
3810                 }
3811                 print "</td>\n";
3812         } else {
3813                 # unknown object: we can only present history for it
3814                 # (this includes 'commit' object, i.e. submodule support)
3815                 print "<td class=\"list\">" .
3816                       esc_path($t->{'name'}) .
3817                       "</td>\n";
3818                 print "<td class=\"link\">";
3819                 if (defined $hash_base) {
3820                         print $cgi->a({-href => href(action=>"history",
3821                                                      hash_base=>$hash_base,
3822                                                      file_name=>"$basedir$t->{'name'}")},
3823                                       "history");
3824                 }
3825                 print "</td>\n";
3826         }
3827 }
3828
3829 ## ......................................................................
3830 ## functions printing large fragments of HTML
3831
3832 # get pre-image filenames for merge (combined) diff
3833 sub fill_from_file_info {
3834         my ($diff, @parents) = @_;
3835
3836         $diff->{'from_file'} = [ ];
3837         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3838         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3839                 if ($diff->{'status'}[$i] eq 'R' ||
3840                     $diff->{'status'}[$i] eq 'C') {
3841                         $diff->{'from_file'}[$i] =
3842                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3843                 }
3844         }
3845
3846         return $diff;
3847 }
3848
3849 # is current raw difftree line of file deletion
3850 sub is_deleted {
3851         my $diffinfo = shift;
3852
3853         return $diffinfo->{'to_id'} eq ('0' x 40);
3854 }
3855
3856 # does patch correspond to [previous] difftree raw line
3857 # $diffinfo  - hashref of parsed raw diff format
3858 # $patchinfo - hashref of parsed patch diff format
3859 #              (the same keys as in $diffinfo)
3860 sub is_patch_split {
3861         my ($diffinfo, $patchinfo) = @_;
3862
3863         return defined $diffinfo && defined $patchinfo
3864                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3865 }
3866
3867
3868 sub git_difftree_body {
3869         my ($difftree, $hash, @parents) = @_;
3870         my ($parent) = $parents[0];
3871         my $have_blame = gitweb_check_feature('blame');
3872         print "<div class=\"list_head\">\n";
3873         if ($#{$difftree} > 10) {
3874                 print(($#{$difftree} + 1) . " files changed:\n");
3875         }
3876         print "</div>\n";
3877
3878         print "<table class=\"" .
3879               (@parents > 1 ? "combined " : "") .
3880               "diff_tree\">\n";
3881
3882         # header only for combined diff in 'commitdiff' view
3883         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3884         if ($has_header) {
3885                 # table header
3886                 print "<thead><tr>\n" .
3887                        "<th></th><th></th>\n"; # filename, patchN link
3888                 for (my $i = 0; $i < @parents; $i++) {
3889                         my $par = $parents[$i];
3890                         print "<th>" .
3891                               $cgi->a({-href => href(action=>"commitdiff",
3892                                                      hash=>$hash, hash_parent=>$par),
3893                                        -title => 'commitdiff to parent number ' .
3894                                                   ($i+1) . ': ' . substr($par,0,7)},
3895                                       $i+1) .
3896                               "&nbsp;</th>\n";
3897                 }
3898                 print "</tr></thead>\n<tbody>\n";
3899         }
3900
3901         my $alternate = 1;
3902         my $patchno = 0;
3903         foreach my $line (@{$difftree}) {
3904                 my $diff = parsed_difftree_line($line);
3905
3906                 if ($alternate) {
3907                         print "<tr class=\"dark\">\n";
3908                 } else {
3909                         print "<tr class=\"light\">\n";
3910                 }
3911                 $alternate ^= 1;
3912
3913                 if (exists $diff->{'nparents'}) { # combined diff
3914
3915                         fill_from_file_info($diff, @parents)
3916                                 unless exists $diff->{'from_file'};
3917
3918                         if (!is_deleted($diff)) {
3919                                 # file exists in the result (child) commit
3920                                 print "<td>" .
3921                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3922                                                              file_name=>$diff->{'to_file'},
3923                                                              hash_base=>$hash),
3924                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3925                                       "</td>\n";
3926                         } else {
3927                                 print "<td>" .
3928                                       esc_path($diff->{'to_file'}) .
3929                                       "</td>\n";
3930                         }
3931
3932                         if ($action eq 'commitdiff') {
3933                                 # link to patch
3934                                 $patchno++;
3935                                 print "<td class=\"link\">" .
3936                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3937                                       " | " .
3938                                       "</td>\n";
3939                         }
3940
3941                         my $has_history = 0;
3942                         my $not_deleted = 0;
3943                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3944                                 my $hash_parent = $parents[$i];
3945                                 my $from_hash = $diff->{'from_id'}[$i];
3946                                 my $from_path = $diff->{'from_file'}[$i];
3947                                 my $status = $diff->{'status'}[$i];
3948
3949                                 $has_history ||= ($status ne 'A');
3950                                 $not_deleted ||= ($status ne 'D');
3951
3952                                 if ($status eq 'A') {
3953                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3954                                 } elsif ($status eq 'D') {
3955                                         print "<td class=\"link\">" .
3956                                               $cgi->a({-href => href(action=>"blob",
3957                                                                      hash_base=>$hash,
3958                                                                      hash=>$from_hash,
3959                                                                      file_name=>$from_path)},
3960                                                       "blob" . ($i+1)) .
3961                                               " | </td>\n";
3962                                 } else {
3963                                         if ($diff->{'to_id'} eq $from_hash) {
3964                                                 print "<td class=\"link nochange\">";
3965                                         } else {
3966                                                 print "<td class=\"link\">";
3967                                         }
3968                                         print $cgi->a({-href => href(action=>"blobdiff",
3969                                                                      hash=>$diff->{'to_id'},
3970                                                                      hash_parent=>$from_hash,
3971                                                                      hash_base=>$hash,
3972                                                                      hash_parent_base=>$hash_parent,
3973                                                                      file_name=>$diff->{'to_file'},
3974                                                                      file_parent=>$from_path)},
3975                                                       "diff" . ($i+1)) .
3976                                               " | </td>\n";
3977                                 }
3978                         }
3979
3980                         print "<td class=\"link\">";
3981                         if ($not_deleted) {
3982                                 print $cgi->a({-href => href(action=>"blob",
3983                                                              hash=>$diff->{'to_id'},
3984                                                              file_name=>$diff->{'to_file'},
3985                                                              hash_base=>$hash)},
3986                                               "blob");
3987                                 print " | " if ($has_history);
3988                         }
3989                         if ($has_history) {
3990                                 print $cgi->a({-href => href(action=>"history",
3991                                                              file_name=>$diff->{'to_file'},
3992                                                              hash_base=>$hash)},
3993                                               "history");
3994                         }
3995                         print "</td>\n";
3996
3997                         print "</tr>\n";
3998                         next; # instead of 'else' clause, to avoid extra indent
3999                 }
4000                 # else ordinary diff
4001
4002                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4003                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4004                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4005                         $to_mode_oct = oct $diff->{'to_mode'};
4006                         if (S_ISREG($to_mode_oct)) { # only for regular file
4007                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4008                         }
4009                         $to_file_type = file_type($diff->{'to_mode'});
4010                 }
4011                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4012                         $from_mode_oct = oct $diff->{'from_mode'};
4013                         if (S_ISREG($to_mode_oct)) { # only for regular file
4014                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4015                         }
4016                         $from_file_type = file_type($diff->{'from_mode'});
4017                 }
4018
4019                 if ($diff->{'status'} eq "A") { # created
4020                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4021                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4022                         $mode_chng   .= "]</span>";
4023                         print "<td>";
4024                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4025                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4026                                       -class => "list"}, esc_path($diff->{'file'}));
4027                         print "</td>\n";
4028                         print "<td>$mode_chng</td>\n";
4029                         print "<td class=\"link\">";
4030                         if ($action eq 'commitdiff') {
4031                                 # link to patch
4032                                 $patchno++;
4033                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4034                                 print " | ";
4035                         }
4036                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4037                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4038                                       "blob");
4039                         print "</td>\n";
4040
4041                 } elsif ($diff->{'status'} eq "D") { # deleted
4042                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4043                         print "<td>";
4044                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4045                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4046                                        -class => "list"}, esc_path($diff->{'file'}));
4047                         print "</td>\n";
4048                         print "<td>$mode_chng</td>\n";
4049                         print "<td class=\"link\">";
4050                         if ($action eq 'commitdiff') {
4051                                 # link to patch
4052                                 $patchno++;
4053                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4054                                 print " | ";
4055                         }
4056                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4057                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4058                                       "blob") . " | ";
4059                         if ($have_blame) {
4060                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4061                                                              file_name=>$diff->{'file'})},
4062                                               "blame") . " | ";
4063                         }
4064                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4065                                                      file_name=>$diff->{'file'})},
4066                                       "history");
4067                         print "</td>\n";
4068
4069                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4070                         my $mode_chnge = "";
4071                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4072                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4073                                 if ($from_file_type ne $to_file_type) {
4074                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4075                                 }
4076                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4077                                         if ($from_mode_str && $to_mode_str) {
4078                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4079                                         } elsif ($to_mode_str) {
4080                                                 $mode_chnge .= " mode: $to_mode_str";
4081                                         }
4082                                 }
4083                                 $mode_chnge .= "]</span>\n";
4084                         }
4085                         print "<td>";
4086                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4087                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4088                                       -class => "list"}, esc_path($diff->{'file'}));
4089                         print "</td>\n";
4090                         print "<td>$mode_chnge</td>\n";
4091                         print "<td class=\"link\">";
4092                         if ($action eq 'commitdiff') {
4093                                 # link to patch
4094                                 $patchno++;
4095                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4096                                       " | ";
4097                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4098                                 # "commit" view and modified file (not onlu mode changed)
4099                                 print $cgi->a({-href => href(action=>"blobdiff",
4100                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4101                                                              hash_base=>$hash, hash_parent_base=>$parent,
4102                                                              file_name=>$diff->{'file'})},
4103                                               "diff") .
4104                                       " | ";
4105                         }
4106                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4107                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4108                                        "blob") . " | ";
4109                         if ($have_blame) {
4110                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4111                                                              file_name=>$diff->{'file'})},
4112                                               "blame") . " | ";
4113                         }
4114                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4115                                                      file_name=>$diff->{'file'})},
4116                                       "history");
4117                         print "</td>\n";
4118
4119                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4120                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4121                         my $nstatus = $status_name{$diff->{'status'}};
4122                         my $mode_chng = "";
4123                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4124                                 # mode also for directories, so we cannot use $to_mode_str
4125                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4126                         }
4127                         print "<td>" .
4128                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4129                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4130                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4131                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4132                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4133                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4134                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4135                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4136                               "<td class=\"link\">";
4137                         if ($action eq 'commitdiff') {
4138                                 # link to patch
4139                                 $patchno++;
4140                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4141                                       " | ";
4142                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4143                                 # "commit" view and modified file (not only pure rename or copy)
4144                                 print $cgi->a({-href => href(action=>"blobdiff",
4145                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4146                                                              hash_base=>$hash, hash_parent_base=>$parent,
4147                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4148                                               "diff") .
4149                                       " | ";
4150                         }
4151                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4152                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4153                                       "blob") . " | ";
4154                         if ($have_blame) {
4155                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4156                                                              file_name=>$diff->{'to_file'})},
4157                                               "blame") . " | ";
4158                         }
4159                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4160                                                     file_name=>$diff->{'to_file'})},
4161                                       "history");
4162                         print "</td>\n";
4163
4164                 } # we should not encounter Unmerged (U) or Unknown (X) status
4165                 print "</tr>\n";
4166         }
4167         print "</tbody>" if $has_header;
4168         print "</table>\n";
4169 }
4170
4171 sub git_patchset_body {
4172         my ($fd, $difftree, $hash, @hash_parents) = @_;
4173         my ($hash_parent) = $hash_parents[0];
4174
4175         my $is_combined = (@hash_parents > 1);
4176         my $patch_idx = 0;
4177         my $patch_number = 0;
4178         my $patch_line;
4179         my $diffinfo;
4180         my $to_name;
4181         my (%from, %to);
4182
4183         print "<div class=\"patchset\">\n";
4184
4185         # skip to first patch
4186         while ($patch_line = <$fd>) {
4187                 chomp $patch_line;
4188
4189                 last if ($patch_line =~ m/^diff /);
4190         }
4191
4192  PATCH:
4193         while ($patch_line) {
4194
4195                 # parse "git diff" header line
4196                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4197                         # $1 is from_name, which we do not use
4198                         $to_name = unquote($2);
4199                         $to_name =~ s!^b/!!;
4200                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4201                         # $1 is 'cc' or 'combined', which we do not use
4202                         $to_name = unquote($2);
4203                 } else {
4204                         $to_name = undef;
4205                 }
4206
4207                 # check if current patch belong to current raw line
4208                 # and parse raw git-diff line if needed
4209                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4210                         # this is continuation of a split patch
4211                         print "<div class=\"patch cont\">\n";
4212                 } else {
4213                         # advance raw git-diff output if needed
4214                         $patch_idx++ if defined $diffinfo;
4215
4216                         # read and prepare patch information
4217                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4218
4219                         # compact combined diff output can have some patches skipped
4220                         # find which patch (using pathname of result) we are at now;
4221                         if ($is_combined) {
4222                                 while ($to_name ne $diffinfo->{'to_file'}) {
4223                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4224                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4225                                               "</div>\n";  # class="patch"
4226
4227                                         $patch_idx++;
4228                                         $patch_number++;
4229
4230                                         last if $patch_idx > $#$difftree;
4231                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4232                                 }
4233                         }
4234
4235                         # modifies %from, %to hashes
4236                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4237
4238                         # this is first patch for raw difftree line with $patch_idx index
4239                         # we index @$difftree array from 0, but number patches from 1
4240                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4241                 }
4242
4243                 # git diff header
4244                 #assert($patch_line =~ m/^diff /) if DEBUG;
4245                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4246                 $patch_number++;
4247                 # print "git diff" header
4248                 print format_git_diff_header_line($patch_line, $diffinfo,
4249                                                   \%from, \%to);
4250
4251                 # print extended diff header
4252                 print "<div class=\"diff extended_header\">\n";
4253         EXTENDED_HEADER:
4254                 while ($patch_line = <$fd>) {
4255                         chomp $patch_line;
4256
4257                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4258
4259                         print format_extended_diff_header_line($patch_line, $diffinfo,
4260                                                                \%from, \%to);
4261                 }
4262                 print "</div>\n"; # class="diff extended_header"
4263
4264                 # from-file/to-file diff header
4265                 if (! $patch_line) {
4266                         print "</div>\n"; # class="patch"
4267                         last PATCH;
4268                 }
4269                 next PATCH if ($patch_line =~ m/^diff /);
4270                 #assert($patch_line =~ m/^---/) if DEBUG;
4271
4272                 my $last_patch_line = $patch_line;
4273                 $patch_line = <$fd>;
4274                 chomp $patch_line;
4275                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4276
4277                 print format_diff_from_to_header($last_patch_line, $patch_line,
4278                                                  $diffinfo, \%from, \%to,
4279                                                  @hash_parents);
4280
4281                 # the patch itself
4282         LINE:
4283                 while ($patch_line = <$fd>) {
4284                         chomp $patch_line;
4285
4286                         next PATCH if ($patch_line =~ m/^diff /);
4287
4288                         print format_diff_line($patch_line, \%from, \%to);
4289                 }
4290
4291         } continue {
4292                 print "</div>\n"; # class="patch"
4293         }
4294
4295         # for compact combined (--cc) format, with chunk and patch simpliciaction
4296         # patchset might be empty, but there might be unprocessed raw lines
4297         for (++$patch_idx if $patch_number > 0;
4298              $patch_idx < @$difftree;
4299              ++$patch_idx) {
4300                 # read and prepare patch information
4301                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4302
4303                 # generate anchor for "patch" links in difftree / whatchanged part
4304                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4305                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4306                       "</div>\n";  # class="patch"
4307
4308                 $patch_number++;
4309         }
4310
4311         if ($patch_number == 0) {
4312                 if (@hash_parents > 1) {
4313                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4314                 } else {
4315                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4316                 }
4317         }
4318
4319         print "</div>\n"; # class="patchset"
4320 }
4321
4322 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4323
4324 # fills project list info (age, description, owner, forks) for each
4325 # project in the list, removing invalid projects from returned list
4326 # NOTE: modifies $projlist, but does not remove entries from it
4327 sub fill_project_list_info {
4328         my ($projlist, $check_forks) = @_;
4329         my @projects;
4330
4331         my $show_ctags = gitweb_check_feature('ctags');
4332  PROJECT:
4333         foreach my $pr (@$projlist) {
4334                 my (@activity) = git_get_last_activity($pr->{'path'});
4335                 unless (@activity) {
4336                         next PROJECT;
4337                 }
4338                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4339                 if (!defined $pr->{'descr'}) {
4340                         my $descr = git_get_project_description($pr->{'path'}) || "";
4341                         $descr = to_utf8($descr);
4342                         $pr->{'descr_long'} = $descr;
4343                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4344                 }
4345                 if (!defined $pr->{'owner'}) {
4346                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4347                 }
4348                 if ($check_forks) {
4349                         my $pname = $pr->{'path'};
4350                         if (($pname =~ s/\.git$//) &&
4351                             ($pname !~ /\/$/) &&
4352                             (-d "$projectroot/$pname")) {
4353                                 $pr->{'forks'} = "-d $projectroot/$pname";
4354                         } else {
4355                                 $pr->{'forks'} = 0;
4356                         }
4357                 }
4358                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4359                 push @projects, $pr;
4360         }
4361
4362         return @projects;
4363 }
4364
4365 # print 'sort by' <th> element, generating 'sort by $name' replay link
4366 # if that order is not selected
4367 sub print_sort_th {
4368         print format_sort_th(@_);
4369 }
4370
4371 sub format_sort_th {
4372         my ($name, $order, $header) = @_;
4373         my $sort_th = "";
4374         $header ||= ucfirst($name);
4375
4376         if ($order eq $name) {
4377                 $sort_th .= "<th>$header</th>\n";
4378         } else {
4379                 $sort_th .= "<th>" .
4380                             $cgi->a({-href => href(-replay=>1, order=>$name),
4381                                      -class => "header"}, $header) .
4382                             "</th>\n";
4383         }
4384
4385         return $sort_th;
4386 }
4387
4388 sub git_project_list_body {
4389         # actually uses global variable $project
4390         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4391
4392         my $check_forks = gitweb_check_feature('forks');
4393         my @projects = fill_project_list_info($projlist, $check_forks);
4394
4395         $order ||= $default_projects_order;
4396         $from = 0 unless defined $from;
4397         $to = $#projects if (!defined $to || $#projects < $to);
4398
4399         my %order_info = (
4400                 project => { key => 'path', type => 'str' },
4401                 descr => { key => 'descr_long', type => 'str' },
4402                 owner => { key => 'owner', type => 'str' },
4403                 age => { key => 'age', type => 'num' }
4404         );
4405         my $oi = $order_info{$order};
4406         if ($oi->{'type'} eq 'str') {
4407                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4408         } else {
4409                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4410         }
4411
4412         my $show_ctags = gitweb_check_feature('ctags');
4413         if ($show_ctags) {
4414                 my %ctags;
4415                 foreach my $p (@projects) {
4416                         foreach my $ct (keys %{$p->{'ctags'}}) {
4417                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4418                         }
4419                 }
4420                 my $cloud = git_populate_project_tagcloud(\%ctags);
4421                 print git_show_project_tagcloud($cloud, 64);
4422         }
4423
4424         print "<table class=\"project_list\">\n";
4425         unless ($no_header) {
4426                 print "<tr>\n";
4427                 if ($check_forks) {
4428                         print "<th></th>\n";
4429                 }
4430                 print_sort_th('project', $order, 'Project');
4431                 print_sort_th('descr', $order, 'Description');
4432                 print_sort_th('owner', $order, 'Owner');
4433                 print_sort_th('age', $order, 'Last Change');
4434                 print "<th></th>\n" . # for links
4435                       "</tr>\n";
4436         }
4437         my $alternate = 1;
4438         my $tagfilter = $cgi->param('by_tag');
4439         for (my $i = $from; $i <= $to; $i++) {
4440                 my $pr = $projects[$i];
4441
4442                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4443                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4444                         and not $pr->{'descr_long'} =~ /$searchtext/;
4445                 # Weed out forks or non-matching entries of search
4446                 if ($check_forks) {
4447                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4448                         $forkbase="^$forkbase" if $forkbase;
4449                         next if not $searchtext and not $tagfilter and $show_ctags
4450                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4451                 }
4452
4453                 if ($alternate) {
4454                         print "<tr class=\"dark\">\n";
4455                 } else {
4456                         print "<tr class=\"light\">\n";
4457                 }
4458                 $alternate ^= 1;
4459                 if ($check_forks) {
4460                         print "<td>";
4461                         if ($pr->{'forks'}) {
4462                                 print "<!-- $pr->{'forks'} -->\n";
4463                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4464                         }
4465                         print "</td>\n";
4466                 }
4467                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4468                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4469                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4470                                         -class => "list", -title => $pr->{'descr_long'}},
4471                                         esc_html($pr->{'descr'})) . "</td>\n" .
4472                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4473                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4474                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4475                       "<td class=\"link\">" .
4476                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4477                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4478                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4479                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4480                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4481                       "</td>\n" .
4482                       "</tr>\n";
4483         }
4484         if (defined $extra) {
4485                 print "<tr>\n";
4486                 if ($check_forks) {
4487                         print "<td></td>\n";
4488                 }
4489                 print "<td colspan=\"5\">$extra</td>\n" .
4490                       "</tr>\n";
4491         }
4492         print "</table>\n";
4493 }
4494
4495 sub git_log_body {
4496         # uses global variable $project
4497         my ($commitlist, $from, $to, $refs, $extra) = @_;
4498
4499         $from = 0 unless defined $from;
4500         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4501
4502         for (my $i = 0; $i <= $to; $i++) {
4503                 my %co = %{$commitlist->[$i]};
4504                 next if !%co;
4505                 my $commit = $co{'id'};
4506                 my $ref = format_ref_marker($refs, $commit);
4507                 my %ad = parse_date($co{'author_epoch'});
4508                 git_print_header_div('commit',
4509                                "<span class=\"age\">$co{'age_string'}</span>" .
4510                                esc_html($co{'title'}) . $ref,
4511                                $commit);
4512                 print "<div class=\"title_text\">\n" .
4513                       "<div class=\"log_link\">\n" .
4514                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4515                       " | " .
4516                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4517                       " | " .
4518                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4519                       "<br/>\n" .
4520                       "</div>\n";
4521                       git_print_authorship(\%co, -tag => 'span');
4522                       print "<br/>\n</div>\n";
4523
4524                 print "<div class=\"log_body\">\n";
4525                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4526                 print "</div>\n";
4527         }
4528         if ($extra) {
4529                 print "<div class=\"page_nav\">\n";
4530                 print "$extra\n";
4531                 print "</div>\n";
4532         }
4533 }
4534
4535 sub git_shortlog_body {
4536         # uses global variable $project
4537         my ($commitlist, $from, $to, $refs, $extra) = @_;
4538
4539         $from = 0 unless defined $from;
4540         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4541
4542         print "<table class=\"shortlog\">\n";
4543         my $alternate = 1;
4544         for (my $i = $from; $i <= $to; $i++) {
4545                 my %co = %{$commitlist->[$i]};
4546                 my $commit = $co{'id'};
4547                 my $ref = format_ref_marker($refs, $commit);
4548                 if ($alternate) {
4549                         print "<tr class=\"dark\">\n";
4550                 } else {
4551                         print "<tr class=\"light\">\n";
4552                 }
4553                 $alternate ^= 1;
4554                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4555                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4556                       format_author_html('td', \%co, 10) . "<td>";
4557                 print format_subject_html($co{'title'}, $co{'title_short'},
4558                                           href(action=>"commit", hash=>$commit), $ref);
4559                 print "</td>\n" .
4560                       "<td class=\"link\">" .
4561                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4562                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4563                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4564                 my $snapshot_links = format_snapshot_links($commit);
4565                 if (defined $snapshot_links) {
4566                         print " | " . $snapshot_links;
4567                 }
4568                 print "</td>\n" .
4569                       "</tr>\n";
4570         }
4571         if (defined $extra) {
4572                 print "<tr>\n" .
4573                       "<td colspan=\"4\">$extra</td>\n" .
4574                       "</tr>\n";
4575         }
4576         print "</table>\n";
4577 }
4578
4579 sub git_history_body {
4580         # Warning: assumes constant type (blob or tree) during history
4581         my ($commitlist, $from, $to, $refs, $extra,
4582             $file_name, $file_hash, $ftype) = @_;
4583
4584         $from = 0 unless defined $from;
4585         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4586
4587         print "<table class=\"history\">\n";
4588         my $alternate = 1;
4589         for (my $i = $from; $i <= $to; $i++) {
4590                 my %co = %{$commitlist->[$i]};
4591                 if (!%co) {
4592                         next;
4593                 }
4594                 my $commit = $co{'id'};
4595
4596                 my $ref = format_ref_marker($refs, $commit);
4597
4598                 if ($alternate) {
4599                         print "<tr class=\"dark\">\n";
4600                 } else {
4601                         print "<tr class=\"light\">\n";
4602                 }
4603                 $alternate ^= 1;
4604                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4605         # shortlog:   format_author_html('td', \%co, 10)
4606                       format_author_html('td', \%co, 15, 3) . "<td>";
4607                 # originally git_history used chop_str($co{'title'}, 50)
4608                 print format_subject_html($co{'title'}, $co{'title_short'},
4609                                           href(action=>"commit", hash=>$commit), $ref);
4610                 print "</td>\n" .
4611                       "<td class=\"link\">" .
4612                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4613                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4614
4615                 if ($ftype eq 'blob') {
4616                         my $blob_current = $file_hash;
4617                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4618                         if (defined $blob_current && defined $blob_parent &&
4619                                         $blob_current ne $blob_parent) {
4620                                 print " | " .
4621                                         $cgi->a({-href => href(action=>"blobdiff",
4622                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4623                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4624                                                                file_name=>$file_name)},
4625                                                 "diff to current");
4626                         }
4627                 }
4628                 print "</td>\n" .
4629                       "</tr>\n";
4630         }
4631         if (defined $extra) {
4632                 print "<tr>\n" .
4633                       "<td colspan=\"4\">$extra</td>\n" .
4634                       "</tr>\n";
4635         }
4636         print "</table>\n";
4637 }
4638
4639 sub git_tags_body {
4640         # uses global variable $project
4641         my ($taglist, $from, $to, $extra) = @_;
4642         $from = 0 unless defined $from;
4643         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4644
4645         print "<table class=\"tags\">\n";
4646         my $alternate = 1;
4647         for (my $i = $from; $i <= $to; $i++) {
4648                 my $entry = $taglist->[$i];
4649                 my %tag = %$entry;
4650                 my $comment = $tag{'subject'};
4651                 my $comment_short;
4652                 if (defined $comment) {
4653                         $comment_short = chop_str($comment, 30, 5);
4654                 }
4655                 if ($alternate) {
4656                         print "<tr class=\"dark\">\n";
4657                 } else {
4658                         print "<tr class=\"light\">\n";
4659                 }
4660                 $alternate ^= 1;
4661                 if (defined $tag{'age'}) {
4662                         print "<td><i>$tag{'age'}</i></td>\n";
4663                 } else {
4664                         print "<td></td>\n";
4665                 }
4666                 print "<td>" .
4667                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4668                                -class => "list name"}, esc_html($tag{'name'})) .
4669                       "</td>\n" .
4670                       "<td>";
4671                 if (defined $comment) {
4672                         print format_subject_html($comment, $comment_short,
4673                                                   href(action=>"tag", hash=>$tag{'id'}));
4674                 }
4675                 print "</td>\n" .
4676                       "<td class=\"selflink\">";
4677                 if ($tag{'type'} eq "tag") {
4678                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4679                 } else {
4680                         print "&nbsp;";
4681                 }
4682                 print "</td>\n" .
4683                       "<td class=\"link\">" . " | " .
4684                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4685                 if ($tag{'reftype'} eq "commit") {
4686                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4687                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4688                 } elsif ($tag{'reftype'} eq "blob") {
4689                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4690                 }
4691                 print "</td>\n" .
4692                       "</tr>";
4693         }
4694         if (defined $extra) {
4695                 print "<tr>\n" .
4696                       "<td colspan=\"5\">$extra</td>\n" .
4697                       "</tr>\n";
4698         }
4699         print "</table>\n";
4700 }
4701
4702 sub git_heads_body {
4703         # uses global variable $project
4704         my ($headlist, $head, $from, $to, $extra) = @_;
4705         $from = 0 unless defined $from;
4706         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4707
4708         print "<table class=\"heads\">\n";
4709         my $alternate = 1;
4710         for (my $i = $from; $i <= $to; $i++) {
4711                 my $entry = $headlist->[$i];
4712                 my %ref = %$entry;
4713                 my $curr = $ref{'id'} eq $head;
4714                 if ($alternate) {
4715                         print "<tr class=\"dark\">\n";
4716                 } else {
4717                         print "<tr class=\"light\">\n";
4718                 }
4719                 $alternate ^= 1;
4720                 print "<td><i>$ref{'age'}</i></td>\n" .
4721                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4722                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4723                                -class => "list name"},esc_html($ref{'name'})) .
4724                       "</td>\n" .
4725                       "<td class=\"link\">" .
4726                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4727                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4728                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4729                       "</td>\n" .
4730                       "</tr>";
4731         }
4732         if (defined $extra) {
4733                 print "<tr>\n" .
4734                       "<td colspan=\"3\">$extra</td>\n" .
4735                       "</tr>\n";
4736         }
4737         print "</table>\n";
4738 }
4739
4740 sub git_search_grep_body {
4741         my ($commitlist, $from, $to, $extra) = @_;
4742         $from = 0 unless defined $from;
4743         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4744
4745         print "<table class=\"commit_search\">\n";
4746         my $alternate = 1;
4747         for (my $i = $from; $i <= $to; $i++) {
4748                 my %co = %{$commitlist->[$i]};
4749                 if (!%co) {
4750                         next;
4751                 }
4752                 my $commit = $co{'id'};
4753                 if ($alternate) {
4754                         print "<tr class=\"dark\">\n";
4755                 } else {
4756                         print "<tr class=\"light\">\n";
4757                 }
4758                 $alternate ^= 1;
4759                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4760                       format_author_html('td', \%co, 15, 5) .
4761                       "<td>" .
4762                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4763                                -class => "list subject"},
4764                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4765                 my $comment = $co{'comment'};
4766                 foreach my $line (@$comment) {
4767                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4768                                 my ($lead, $match, $trail) = ($1, $2, $3);
4769                                 $match = chop_str($match, 70, 5, 'center');
4770                                 my $contextlen = int((80 - length($match))/2);
4771                                 $contextlen = 30 if ($contextlen > 30);
4772                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4773                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4774
4775                                 $lead  = esc_html($lead);
4776                                 $match = esc_html($match);
4777                                 $trail = esc_html($trail);
4778
4779                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4780                         }
4781                 }
4782                 print "</td>\n" .
4783                       "<td class=\"link\">" .
4784                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4785                       " | " .
4786                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4787                       " | " .
4788                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4789                 print "</td>\n" .
4790                       "</tr>\n";
4791         }
4792         if (defined $extra) {
4793                 print "<tr>\n" .
4794                       "<td colspan=\"3\">$extra</td>\n" .
4795                       "</tr>\n";
4796         }
4797         print "</table>\n";
4798 }
4799
4800 ## ======================================================================
4801 ## ======================================================================
4802 ## actions
4803
4804 sub git_project_list {
4805         my $order = $input_params{'order'};
4806         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4807                 die_error(400, "Unknown order parameter");
4808         }
4809
4810         my @list = git_get_projects_list();
4811         if (!@list) {
4812                 die_error(404, "No projects found");
4813         }
4814
4815         git_header_html();
4816         if (defined $home_text && -f $home_text) {
4817                 print "<div class=\"index_include\">\n";
4818                 insert_file($home_text);
4819                 print "</div>\n";
4820         }
4821         print $cgi->startform(-method => "get") .
4822               "<p class=\"projsearch\">Search:\n" .
4823               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4824               "</p>" .
4825               $cgi->end_form() . "\n";
4826         git_project_list_body(\@list, $order);
4827         git_footer_html();
4828 }
4829
4830 sub git_forks {
4831         my $order = $input_params{'order'};
4832         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4833                 die_error(400, "Unknown order parameter");
4834         }
4835
4836         my @list = git_get_projects_list($project);
4837         if (!@list) {
4838                 die_error(404, "No forks found");
4839         }
4840
4841         git_header_html();
4842         git_print_page_nav('','');
4843         git_print_header_div('summary', "$project forks");
4844         git_project_list_body(\@list, $order);
4845         git_footer_html();
4846 }
4847
4848 sub git_project_index {
4849         my @projects = git_get_projects_list($project);
4850
4851         print $cgi->header(
4852                 -type => 'text/plain',
4853                 -charset => 'utf-8',
4854                 -content_disposition => 'inline; filename="index.aux"');
4855
4856         foreach my $pr (@projects) {
4857                 if (!exists $pr->{'owner'}) {
4858                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4859                 }
4860
4861                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4862                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4863                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4864                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4865                 $path  =~ s/ /\+/g;
4866                 $owner =~ s/ /\+/g;
4867
4868                 print "$path $owner\n";
4869         }
4870 }
4871
4872 sub git_summary {
4873         my $descr = git_get_project_description($project) || "none";
4874         my %co = parse_commit("HEAD");
4875         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4876         my $head = $co{'id'};
4877
4878         my $owner = git_get_project_owner($project);
4879
4880         my $refs = git_get_references();
4881         # These get_*_list functions return one more to allow us to see if
4882         # there are more ...
4883         my @taglist  = git_get_tags_list(16);
4884         my @headlist = git_get_heads_list(16);
4885         my @forklist;
4886         my $check_forks = gitweb_check_feature('forks');
4887
4888         if ($check_forks) {
4889                 @forklist = git_get_projects_list($project);
4890         }
4891
4892         git_header_html();
4893         git_print_page_nav('summary','', $head);
4894
4895         print "<div class=\"title\">&nbsp;</div>\n";
4896         print "<table class=\"projects_list\">\n" .
4897               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4898               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4899         if (defined $cd{'rfc2822'}) {
4900                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4901         }
4902
4903         # use per project git URL list in $projectroot/$project/cloneurl
4904         # or make project git URL from git base URL and project name
4905         my $url_tag = "URL";
4906         my @url_list = git_get_project_url_list($project);
4907         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4908         foreach my $git_url (@url_list) {
4909                 next unless $git_url;
4910                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4911                 $url_tag = "";
4912         }
4913
4914         # Tag cloud
4915         my $show_ctags = gitweb_check_feature('ctags');
4916         if ($show_ctags) {
4917                 my $ctags = git_get_project_ctags($project);
4918                 my $cloud = git_populate_project_tagcloud($ctags);
4919                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4920                 print "</td>\n<td>" unless %$ctags;
4921                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4922                 print "</td>\n<td>" if %$ctags;
4923                 print git_show_project_tagcloud($cloud, 48);
4924                 print "</td></tr>";
4925         }
4926
4927         print "</table>\n";
4928
4929         # If XSS prevention is on, we don't include README.html.
4930         # TODO: Allow a readme in some safe format.
4931         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4932                 print "<div class=\"title\">readme</div>\n" .
4933                       "<div class=\"readme\">\n";
4934                 insert_file("$projectroot/$project/README.html");
4935                 print "\n</div>\n"; # class="readme"
4936         }
4937
4938         # we need to request one more than 16 (0..15) to check if
4939         # those 16 are all
4940         my @commitlist = $head ? parse_commits($head, 17) : ();
4941         if (@commitlist) {
4942                 git_print_header_div('shortlog');
4943                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4944                                   $#commitlist <=  15 ? undef :
4945                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4946         }
4947
4948         if (@taglist) {
4949                 git_print_header_div('tags');
4950                 git_tags_body(\@taglist, 0, 15,
4951                               $#taglist <=  15 ? undef :
4952                               $cgi->a({-href => href(action=>"tags")}, "..."));
4953         }
4954
4955         if (@headlist) {
4956                 git_print_header_div('heads');
4957                 git_heads_body(\@headlist, $head, 0, 15,
4958                                $#headlist <= 15 ? undef :
4959                                $cgi->a({-href => href(action=>"heads")}, "..."));
4960         }
4961
4962         if (@forklist) {
4963                 git_print_header_div('forks');
4964                 git_project_list_body(\@forklist, 'age', 0, 15,
4965                                       $#forklist <= 15 ? undef :
4966                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4967                                       'no_header');
4968         }
4969
4970         git_footer_html();
4971 }
4972
4973 sub git_tag {
4974         my $head = git_get_head_hash($project);
4975         git_header_html();
4976         git_print_page_nav('','', $head,undef,$head);
4977         my %tag = parse_tag($hash);
4978
4979         if (! %tag) {
4980                 die_error(404, "Unknown tag object");
4981         }
4982
4983         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4984         print "<div class=\"title_text\">\n" .
4985               "<table class=\"object_header\">\n" .
4986               "<tr>\n" .
4987               "<td>object</td>\n" .
4988               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4989                                $tag{'object'}) . "</td>\n" .
4990               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4991                                               $tag{'type'}) . "</td>\n" .
4992               "</tr>\n";
4993         if (defined($tag{'author'})) {
4994                 git_print_authorship_rows(\%tag, 'author');
4995         }
4996         print "</table>\n\n" .
4997               "</div>\n";
4998         print "<div class=\"page_body\">";
4999         my $comment = $tag{'comment'};
5000         foreach my $line (@$comment) {
5001                 chomp $line;
5002                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5003         }
5004         print "</div>\n";
5005         git_footer_html();
5006 }
5007
5008 sub git_blame_common {
5009         my $format = shift || 'porcelain';
5010         if ($format eq 'porcelain' && $cgi->param('js')) {
5011                 $format = 'incremental';
5012                 $action = 'blame_incremental'; # for page title etc
5013         }
5014
5015         # permissions
5016         gitweb_check_feature('blame')
5017                 or die_error(403, "Blame view not allowed");
5018
5019         # error checking
5020         die_error(400, "No file name given") unless $file_name;
5021         $hash_base ||= git_get_head_hash($project);
5022         die_error(404, "Couldn't find base commit") unless $hash_base;
5023         my %co = parse_commit($hash_base)
5024                 or die_error(404, "Commit not found");
5025         my $ftype = "blob";
5026         if (!defined $hash) {
5027                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5028                         or die_error(404, "Error looking up file");
5029         } else {
5030                 $ftype = git_get_type($hash);
5031                 if ($ftype !~ "blob") {
5032                         die_error(400, "Object is not a blob");
5033                 }
5034         }
5035
5036         my $fd;
5037         if ($format eq 'incremental') {
5038                 # get file contents (as base)
5039                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5040                         or die_error(500, "Open git-cat-file failed");
5041         } elsif ($format eq 'data') {
5042                 # run git-blame --incremental
5043                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5044                         $hash_base, "--", $file_name
5045                         or die_error(500, "Open git-blame --incremental failed");
5046         } else {
5047                 # run git-blame --porcelain
5048                 open $fd, "-|", git_cmd(), "blame", '-p',
5049                         $hash_base, '--', $file_name
5050                         or die_error(500, "Open git-blame --porcelain failed");
5051         }
5052
5053         # incremental blame data returns early
5054         if ($format eq 'data') {
5055                 print $cgi->header(
5056                         -type=>"text/plain", -charset => "utf-8",
5057                         -status=> "200 OK");
5058                 local $| = 1; # output autoflush
5059                 print while <$fd>;
5060                 close $fd
5061                         or print "ERROR $!\n";
5062
5063                 print 'END';
5064                 if (defined $t0 && gitweb_check_feature('timed')) {
5065                         print ' '.
5066                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5067                               ' '.$number_of_git_cmds;
5068                 }
5069                 print "\n";
5070
5071                 return;
5072         }
5073
5074         # page header
5075         git_header_html();
5076         my $formats_nav =
5077                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5078                         "blob") .
5079                 " | ";
5080         if ($format eq 'incremental') {
5081                 $formats_nav .=
5082                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5083                                 "blame") . " (non-incremental)";
5084         } else {
5085                 $formats_nav .=
5086                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5087                                 "blame") . " (incremental)";
5088         }
5089         $formats_nav .=
5090                 " | " .
5091                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5092                         "history") .
5093                 " | " .
5094                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5095                         "HEAD");
5096         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5097         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5098         git_print_page_path($file_name, $ftype, $hash_base);
5099
5100         # page body
5101         if ($format eq 'incremental') {
5102                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5103                       "This page requires JavaScript to run.\n Use ".
5104                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5105                               'this page').
5106                       " instead.\n".
5107                       "</b></center></div>\n</noscript>\n";
5108
5109                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5110         }
5111
5112         print qq!<div class="page_body">\n!;
5113         print qq!<div id="progress_info">... / ...</div>\n!
5114                 if ($format eq 'incremental');
5115         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5116               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5117               qq!<thead>\n!.
5118               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5119               qq!</thead>\n!.
5120               qq!<tbody>\n!;
5121
5122         my @rev_color = qw(light dark);
5123         my $num_colors = scalar(@rev_color);
5124         my $current_color = 0;
5125
5126         if ($format eq 'incremental') {
5127                 my $color_class = $rev_color[$current_color];
5128
5129                 #contents of a file
5130                 my $linenr = 0;
5131         LINE:
5132                 while (my $line = <$fd>) {
5133                         chomp $line;
5134                         $linenr++;
5135
5136                         print qq!<tr id="l$linenr" class="$color_class">!.
5137                               qq!<td class="sha1"><a href=""> </a></td>!.
5138                               qq!<td class="linenr">!.
5139                               qq!<a class="linenr" href="">$linenr</a></td>!;
5140                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5141                         print qq!</tr>\n!;
5142                 }
5143
5144         } else { # porcelain, i.e. ordinary blame
5145                 my %metainfo = (); # saves information about commits
5146
5147                 # blame data
5148         LINE:
5149                 while (my $line = <$fd>) {
5150                         chomp $line;
5151                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5152                         # no <lines in group> for subsequent lines in group of lines
5153                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5154                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5155                         if (!exists $metainfo{$full_rev}) {
5156                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5157                         }
5158                         my $meta = $metainfo{$full_rev};
5159                         my $data;
5160                         while ($data = <$fd>) {
5161                                 chomp $data;
5162                                 last if ($data =~ s/^\t//); # contents of line
5163                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5164                                         $meta->{$1} = $2 unless exists $meta->{$1};
5165                                 }
5166                                 if ($data =~ /^previous /) {
5167                                         $meta->{'nprevious'}++;
5168                                 }
5169                         }
5170                         my $short_rev = substr($full_rev, 0, 8);
5171                         my $author = $meta->{'author'};
5172                         my %date =
5173                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5174                         my $date = $date{'iso-tz'};
5175                         if ($group_size) {
5176                                 $current_color = ($current_color + 1) % $num_colors;
5177                         }
5178                         my $tr_class = $rev_color[$current_color];
5179                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5180                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5181                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5182                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5183                         if ($group_size) {
5184                                 print "<td class=\"sha1\"";
5185                                 print " title=\"". esc_html($author) . ", $date\"";
5186                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5187                                 print ">";
5188                                 print $cgi->a({-href => href(action=>"commit",
5189                                                              hash=>$full_rev,
5190                                                              file_name=>$file_name)},
5191                                               esc_html($short_rev));
5192                                 if ($group_size >= 2) {
5193                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5194                                         if (@author_initials) {
5195                                                 print "<br />" .
5196                                                       esc_html(join('', @author_initials));
5197                                                 #           or join('.', ...)
5198                                         }
5199                                 }
5200                                 print "</td>\n";
5201                         }
5202                         # 'previous' <sha1 of parent commit> <filename at commit>
5203                         if (exists $meta->{'previous'} &&
5204                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5205                                 $meta->{'parent'} = $1;
5206                                 $meta->{'file_parent'} = unquote($2);
5207                         }
5208                         my $linenr_commit =
5209                                 exists($meta->{'parent'}) ?
5210                                 $meta->{'parent'} : $full_rev;
5211                         my $linenr_filename =
5212                                 exists($meta->{'file_parent'}) ?
5213                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5214                         my $blamed = href(action => 'blame',
5215                                           file_name => $linenr_filename,
5216                                           hash_base => $linenr_commit);
5217                         print "<td class=\"linenr\">";
5218                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5219                                         -class => "linenr" },
5220                                       esc_html($lineno));
5221                         print "</td>";
5222                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5223                         print "</tr>\n";
5224                 } # end while
5225
5226         }
5227
5228         # footer
5229         print "</tbody>\n".
5230               "</table>\n"; # class="blame"
5231         print "</div>\n";   # class="blame_body"
5232         close $fd
5233                 or print "Reading blob failed\n";
5234
5235         git_footer_html();
5236 }
5237
5238 sub git_blame {
5239         git_blame_common();
5240 }
5241
5242 sub git_blame_incremental {
5243         git_blame_common('incremental');
5244 }
5245
5246 sub git_blame_data {
5247         git_blame_common('data');
5248 }
5249
5250 sub git_tags {
5251         my $head = git_get_head_hash($project);
5252         git_header_html();
5253         git_print_page_nav('','', $head,undef,$head);
5254         git_print_header_div('summary', $project);
5255
5256         my @tagslist = git_get_tags_list();
5257         if (@tagslist) {
5258                 git_tags_body(\@tagslist);
5259         }
5260         git_footer_html();
5261 }
5262
5263 sub git_heads {
5264         my $head = git_get_head_hash($project);
5265         git_header_html();
5266         git_print_page_nav('','', $head,undef,$head);
5267         git_print_header_div('summary', $project);
5268
5269         my @headslist = git_get_heads_list();
5270         if (@headslist) {
5271                 git_heads_body(\@headslist, $head);
5272         }
5273         git_footer_html();
5274 }
5275
5276 sub git_blob_plain {
5277         my $type = shift;
5278         my $expires;
5279
5280         if (!defined $hash) {
5281                 if (defined $file_name) {
5282                         my $base = $hash_base || git_get_head_hash($project);
5283                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5284                                 or die_error(404, "Cannot find file");
5285                 } else {
5286                         die_error(400, "No file name defined");
5287                 }
5288         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5289                 # blobs defined by non-textual hash id's can be cached
5290                 $expires = "+1d";
5291         }
5292
5293         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5294                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5295
5296         # content-type (can include charset)
5297         $type = blob_contenttype($fd, $file_name, $type);
5298
5299         # "save as" filename, even when no $file_name is given
5300         my $save_as = "$hash";
5301         if (defined $file_name) {
5302                 $save_as = $file_name;
5303         } elsif ($type =~ m/^text\//) {
5304                 $save_as .= '.txt';
5305         }
5306
5307         # With XSS prevention on, blobs of all types except a few known safe
5308         # ones are served with "Content-Disposition: attachment" to make sure
5309         # they don't run in our security domain.  For certain image types,
5310         # blob view writes an <img> tag referring to blob_plain view, and we
5311         # want to be sure not to break that by serving the image as an
5312         # attachment (though Firefox 3 doesn't seem to care).
5313         my $sandbox = $prevent_xss &&
5314                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5315
5316         print $cgi->header(
5317                 -type => $type,
5318                 -expires => $expires,
5319                 -content_disposition =>
5320                         ($sandbox ? 'attachment' : 'inline')
5321                         . '; filename="' . $save_as . '"');
5322         local $/ = undef;
5323         binmode STDOUT, ':raw';
5324         print <$fd>;
5325         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5326         close $fd;
5327 }
5328
5329 sub git_blob {
5330         my $expires;
5331
5332         if (!defined $hash) {
5333                 if (defined $file_name) {
5334                         my $base = $hash_base || git_get_head_hash($project);
5335                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5336                                 or die_error(404, "Cannot find file");
5337                 } else {
5338                         die_error(400, "No file name defined");
5339                 }
5340         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5341                 # blobs defined by non-textual hash id's can be cached
5342                 $expires = "+1d";
5343         }
5344
5345         my $have_blame = gitweb_check_feature('blame');
5346         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5347                 or die_error(500, "Couldn't cat $file_name, $hash");
5348         my $mimetype = blob_mimetype($fd, $file_name);
5349         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5350                 close $fd;
5351                 return git_blob_plain($mimetype);
5352         }
5353         # we can have blame only for text/* mimetype
5354         $have_blame &&= ($mimetype =~ m!^text/!);
5355
5356         git_header_html(undef, $expires);
5357         my $formats_nav = '';
5358         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5359                 if (defined $file_name) {
5360                         if ($have_blame) {
5361                                 $formats_nav .=
5362                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5363                                                 "blame") .
5364                                         " | ";
5365                         }
5366                         $formats_nav .=
5367                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5368                                         "history") .
5369                                 " | " .
5370                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5371                                         "raw") .
5372                                 " | " .
5373                                 $cgi->a({-href => href(action=>"blob",
5374                                                        hash_base=>"HEAD", file_name=>$file_name)},
5375                                         "HEAD");
5376                 } else {
5377                         $formats_nav .=
5378                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5379                                         "raw");
5380                 }
5381                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5382                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5383         } else {
5384                 print "<div class=\"page_nav\">\n" .
5385                       "<br/><br/></div>\n" .
5386                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5387         }
5388         git_print_page_path($file_name, "blob", $hash_base);
5389         print "<div class=\"page_body\">\n";
5390         if ($mimetype =~ m!^image/!) {
5391                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5392                 if ($file_name) {
5393                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5394                 }
5395                 print qq! src="! .
5396                       href(action=>"blob_plain", hash=>$hash,
5397                            hash_base=>$hash_base, file_name=>$file_name) .
5398                       qq!" />\n!;
5399         } else {
5400                 my $nr;
5401                 while (my $line = <$fd>) {
5402                         chomp $line;
5403                         $nr++;
5404                         $line = untabify($line);
5405                         printf "<div class=\"pre\"><a id=\"l%i\" href=\""
5406                                 . esc_attr(href(-replay => 1))
5407                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5408                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5409                 }
5410         }
5411         close $fd
5412                 or print "Reading blob failed.\n";
5413         print "</div>";
5414         git_footer_html();
5415 }
5416
5417 sub git_tree {
5418         if (!defined $hash_base) {
5419                 $hash_base = "HEAD";
5420         }
5421         if (!defined $hash) {
5422                 if (defined $file_name) {
5423                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5424                 } else {
5425                         $hash = $hash_base;
5426                 }
5427         }
5428         die_error(404, "No such tree") unless defined($hash);
5429
5430         my $show_sizes = gitweb_check_feature('show-sizes');
5431         my $have_blame = gitweb_check_feature('blame');
5432
5433         my @entries = ();
5434         {
5435                 local $/ = "\0";
5436                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5437                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5438                         or die_error(500, "Open git-ls-tree failed");
5439                 @entries = map { chomp; $_ } <$fd>;
5440                 close $fd
5441                         or die_error(404, "Reading tree failed");
5442         }
5443
5444         my $refs = git_get_references();
5445         my $ref = format_ref_marker($refs, $hash_base);
5446         git_header_html();
5447         my $basedir = '';
5448         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5449                 my @views_nav = ();
5450                 if (defined $file_name) {
5451                         push @views_nav,
5452                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5453                                         "history"),
5454                                 $cgi->a({-href => href(action=>"tree",
5455                                                        hash_base=>"HEAD", file_name=>$file_name)},
5456                                         "HEAD"),
5457                 }
5458                 my $snapshot_links = format_snapshot_links($hash);
5459                 if (defined $snapshot_links) {
5460                         # FIXME: Should be available when we have no hash base as well.
5461                         push @views_nav, $snapshot_links;
5462                 }
5463                 git_print_page_nav('tree','', $hash_base, undef, undef,
5464                                    join(' | ', @views_nav));
5465                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5466         } else {
5467                 undef $hash_base;
5468                 print "<div class=\"page_nav\">\n";
5469                 print "<br/><br/></div>\n";
5470                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5471         }
5472         if (defined $file_name) {
5473                 $basedir = $file_name;
5474                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5475                         $basedir .= '/';
5476                 }
5477                 git_print_page_path($file_name, 'tree', $hash_base);
5478         }
5479         print "<div class=\"page_body\">\n";
5480         print "<table class=\"tree\">\n";
5481         my $alternate = 1;
5482         # '..' (top directory) link if possible
5483         if (defined $hash_base &&
5484             defined $file_name && $file_name =~ m![^/]+$!) {
5485                 if ($alternate) {
5486                         print "<tr class=\"dark\">\n";
5487                 } else {
5488                         print "<tr class=\"light\">\n";
5489                 }
5490                 $alternate ^= 1;
5491
5492                 my $up = $file_name;
5493                 $up =~ s!/?[^/]+$!!;
5494                 undef $up unless $up;
5495                 # based on git_print_tree_entry
5496                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5497                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5498                 print '<td class="list">';
5499                 print $cgi->a({-href => href(action=>"tree",
5500                                              hash_base=>$hash_base,
5501                                              file_name=>$up)},
5502                               "..");
5503                 print "</td>\n";
5504                 print "<td class=\"link\"></td>\n";
5505
5506                 print "</tr>\n";
5507         }
5508         foreach my $line (@entries) {
5509                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5510
5511                 if ($alternate) {
5512                         print "<tr class=\"dark\">\n";
5513                 } else {
5514                         print "<tr class=\"light\">\n";
5515                 }
5516                 $alternate ^= 1;
5517
5518                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5519
5520                 print "</tr>\n";
5521         }
5522         print "</table>\n" .
5523               "</div>";
5524         git_footer_html();
5525 }
5526
5527 sub snapshot_name {
5528         my ($project, $hash) = @_;
5529
5530         # path/to/project.git  -> project
5531         # path/to/project/.git -> project
5532         my $name = to_utf8($project);
5533         $name =~ s,([^/])/*\.git$,$1,;
5534         $name = basename($name);
5535         # sanitize name
5536         $name =~ s/[[:cntrl:]]/?/g;
5537
5538         my $ver = $hash;
5539         if ($hash =~ /^[0-9a-fA-F]+$/) {
5540                 # shorten SHA-1 hash
5541                 my $full_hash = git_get_full_hash($project, $hash);
5542                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5543                         $ver = git_get_short_hash($project, $hash);
5544                 }
5545         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5546                 # tags don't need shortened SHA-1 hash
5547                 $ver = $1;
5548         } else {
5549                 # branches and other need shortened SHA-1 hash
5550                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5551                         $ver = $1;
5552                 }
5553                 $ver .= '-' . git_get_short_hash($project, $hash);
5554         }
5555         # in case of hierarchical branch names
5556         $ver =~ s!/!.!g;
5557
5558         # name = project-version_string
5559         $name = "$name-$ver";
5560
5561         return wantarray ? ($name, $name) : $name;
5562 }
5563
5564 sub git_snapshot {
5565         my $format = $input_params{'snapshot_format'};
5566         if (!@snapshot_fmts) {
5567                 die_error(403, "Snapshots not allowed");
5568         }
5569         # default to first supported snapshot format
5570         $format ||= $snapshot_fmts[0];
5571         if ($format !~ m/^[a-z0-9]+$/) {
5572                 die_error(400, "Invalid snapshot format parameter");
5573         } elsif (!exists($known_snapshot_formats{$format})) {
5574                 die_error(400, "Unknown snapshot format");
5575         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5576                 die_error(403, "Snapshot format not allowed");
5577         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5578                 die_error(403, "Unsupported snapshot format");
5579         }
5580
5581         my $type = git_get_type("$hash^{}");
5582         if (!$type) {
5583                 die_error(404, 'Object does not exist');
5584         }  elsif ($type eq 'blob') {
5585                 die_error(400, 'Object is not a tree-ish');
5586         }
5587
5588         my ($name, $prefix) = snapshot_name($project, $hash);
5589         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5590         my $cmd = quote_command(
5591                 git_cmd(), 'archive',
5592                 "--format=$known_snapshot_formats{$format}{'format'}",
5593                 "--prefix=$prefix/", $hash);
5594         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5595                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5596         }
5597
5598         $filename =~ s/(["\\])/\\$1/g;
5599         print $cgi->header(
5600                 -type => $known_snapshot_formats{$format}{'type'},
5601                 -content_disposition => 'inline; filename="' . $filename . '"',
5602                 -status => '200 OK');
5603
5604         open my $fd, "-|", $cmd
5605                 or die_error(500, "Execute git-archive failed");
5606         binmode STDOUT, ':raw';
5607         print <$fd>;
5608         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5609         close $fd;
5610 }
5611
5612 sub git_log_generic {
5613         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5614
5615         my $head = git_get_head_hash($project);
5616         if (!defined $base) {
5617                 $base = $head;
5618         }
5619         if (!defined $page) {
5620                 $page = 0;
5621         }
5622         my $refs = git_get_references();
5623
5624         my $commit_hash = $base;
5625         if (defined $parent) {
5626                 $commit_hash = "$parent..$base";
5627         }
5628         my @commitlist =
5629                 parse_commits($commit_hash, 101, (100 * $page),
5630                               defined $file_name ? ($file_name, "--full-history") : ());
5631
5632         my $ftype;
5633         if (!defined $file_hash && defined $file_name) {
5634                 # some commits could have deleted file in question,
5635                 # and not have it in tree, but one of them has to have it
5636                 for (my $i = 0; $i < @commitlist; $i++) {
5637                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5638                         last if defined $file_hash;
5639                 }
5640         }
5641         if (defined $file_hash) {
5642                 $ftype = git_get_type($file_hash);
5643         }
5644         if (defined $file_name && !defined $ftype) {
5645                 die_error(500, "Unknown type of object");
5646         }
5647         my %co;
5648         if (defined $file_name) {
5649                 %co = parse_commit($base)
5650                         or die_error(404, "Unknown commit object");
5651         }
5652
5653
5654         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5655         my $next_link = '';
5656         if ($#commitlist >= 100) {
5657                 $next_link =
5658                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5659                                  -accesskey => "n", -title => "Alt-n"}, "next");
5660         }
5661         my $patch_max = gitweb_get_feature('patches');
5662         if ($patch_max && !defined $file_name) {
5663                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5664                         $paging_nav .= " &sdot; " .
5665                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5666                                         "patches");
5667                 }
5668         }
5669
5670         git_header_html();
5671         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5672         if (defined $file_name) {
5673                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5674         } else {
5675                 git_print_header_div('summary', $project)
5676         }
5677         git_print_page_path($file_name, $ftype, $hash_base)
5678                 if (defined $file_name);
5679
5680         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5681                      $file_name, $file_hash, $ftype);
5682
5683         git_footer_html();
5684 }
5685
5686 sub git_log {
5687         git_log_generic('log', \&git_log_body,
5688                         $hash, $hash_parent);
5689 }
5690
5691 sub git_commit {
5692         $hash ||= $hash_base || "HEAD";
5693         my %co = parse_commit($hash)
5694             or die_error(404, "Unknown commit object");
5695
5696         my $parent  = $co{'parent'};
5697         my $parents = $co{'parents'}; # listref
5698
5699         # we need to prepare $formats_nav before any parameter munging
5700         my $formats_nav;
5701         if (!defined $parent) {
5702                 # --root commitdiff
5703                 $formats_nav .= '(initial)';
5704         } elsif (@$parents == 1) {
5705                 # single parent commit
5706                 $formats_nav .=
5707                         '(parent: ' .
5708                         $cgi->a({-href => href(action=>"commit",
5709                                                hash=>$parent)},
5710                                 esc_html(substr($parent, 0, 7))) .
5711                         ')';
5712         } else {
5713                 # merge commit
5714                 $formats_nav .=
5715                         '(merge: ' .
5716                         join(' ', map {
5717                                 $cgi->a({-href => href(action=>"commit",
5718                                                        hash=>$_)},
5719                                         esc_html(substr($_, 0, 7)));
5720                         } @$parents ) .
5721                         ')';
5722         }
5723         if (gitweb_check_feature('patches') && @$parents <= 1) {
5724                 $formats_nav .= " | " .
5725                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5726                                 "patch");
5727         }
5728
5729         if (!defined $parent) {
5730                 $parent = "--root";
5731         }
5732         my @difftree;
5733         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5734                 @diff_opts,
5735                 (@$parents <= 1 ? $parent : '-c'),
5736                 $hash, "--"
5737                 or die_error(500, "Open git-diff-tree failed");
5738         @difftree = map { chomp; $_ } <$fd>;
5739         close $fd or die_error(404, "Reading git-diff-tree failed");
5740
5741         # non-textual hash id's can be cached
5742         my $expires;
5743         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5744                 $expires = "+1d";
5745         }
5746         my $refs = git_get_references();
5747         my $ref = format_ref_marker($refs, $co{'id'});
5748
5749         git_header_html(undef, $expires);
5750         git_print_page_nav('commit', '',
5751                            $hash, $co{'tree'}, $hash,
5752                            $formats_nav);
5753
5754         if (defined $co{'parent'}) {
5755                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5756         } else {
5757                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5758         }
5759         print "<div class=\"title_text\">\n" .
5760               "<table class=\"object_header\">\n";
5761         git_print_authorship_rows(\%co);
5762         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5763         print "<tr>" .
5764               "<td>tree</td>" .
5765               "<td class=\"sha1\">" .
5766               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5767                        class => "list"}, $co{'tree'}) .
5768               "</td>" .
5769               "<td class=\"link\">" .
5770               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5771                       "tree");
5772         my $snapshot_links = format_snapshot_links($hash);
5773         if (defined $snapshot_links) {
5774                 print " | " . $snapshot_links;
5775         }
5776         print "</td>" .
5777               "</tr>\n";
5778
5779         foreach my $par (@$parents) {
5780                 print "<tr>" .
5781                       "<td>parent</td>" .
5782                       "<td class=\"sha1\">" .
5783                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5784                                class => "list"}, $par) .
5785                       "</td>" .
5786                       "<td class=\"link\">" .
5787                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5788                       " | " .
5789                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5790                       "</td>" .
5791                       "</tr>\n";
5792         }
5793         print "</table>".
5794               "</div>\n";
5795
5796         print "<div class=\"page_body\">\n";
5797         git_print_log($co{'comment'});
5798         print "</div>\n";
5799
5800         git_difftree_body(\@difftree, $hash, @$parents);
5801
5802         git_footer_html();
5803 }
5804
5805 sub git_object {
5806         # object is defined by:
5807         # - hash or hash_base alone
5808         # - hash_base and file_name
5809         my $type;
5810
5811         # - hash or hash_base alone
5812         if ($hash || ($hash_base && !defined $file_name)) {
5813                 my $object_id = $hash || $hash_base;
5814
5815                 open my $fd, "-|", quote_command(
5816                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5817                         or die_error(404, "Object does not exist");
5818                 $type = <$fd>;
5819                 chomp $type;
5820                 close $fd
5821                         or die_error(404, "Object does not exist");
5822
5823         # - hash_base and file_name
5824         } elsif ($hash_base && defined $file_name) {
5825                 $file_name =~ s,/+$,,;
5826
5827                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5828                         or die_error(404, "Base object does not exist");
5829
5830                 # here errors should not hapen
5831                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5832                         or die_error(500, "Open git-ls-tree failed");
5833                 my $line = <$fd>;
5834                 close $fd;
5835
5836                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5837                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5838                         die_error(404, "File or directory for given base does not exist");
5839                 }
5840                 $type = $2;
5841                 $hash = $3;
5842         } else {
5843                 die_error(400, "Not enough information to find object");
5844         }
5845
5846         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5847                                           hash=>$hash, hash_base=>$hash_base,
5848                                           file_name=>$file_name),
5849                              -status => '302 Found');
5850 }
5851
5852 sub git_blobdiff {
5853         my $format = shift || 'html';
5854
5855         my $fd;
5856         my @difftree;
5857         my %diffinfo;
5858         my $expires;
5859
5860         # preparing $fd and %diffinfo for git_patchset_body
5861         # new style URI
5862         if (defined $hash_base && defined $hash_parent_base) {
5863                 if (defined $file_name) {
5864                         # read raw output
5865                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5866                                 $hash_parent_base, $hash_base,
5867                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5868                                 or die_error(500, "Open git-diff-tree failed");
5869                         @difftree = map { chomp; $_ } <$fd>;
5870                         close $fd
5871                                 or die_error(404, "Reading git-diff-tree failed");
5872                         @difftree
5873                                 or die_error(404, "Blob diff not found");
5874
5875                 } elsif (defined $hash &&
5876                          $hash =~ /[0-9a-fA-F]{40}/) {
5877                         # try to find filename from $hash
5878
5879                         # read filtered raw output
5880                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5881                                 $hash_parent_base, $hash_base, "--"
5882                                 or die_error(500, "Open git-diff-tree failed");
5883                         @difftree =
5884                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5885                                 # $hash == to_id
5886                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5887                                 map { chomp; $_ } <$fd>;
5888                         close $fd
5889                                 or die_error(404, "Reading git-diff-tree failed");
5890                         @difftree
5891                                 or die_error(404, "Blob diff not found");
5892
5893                 } else {
5894                         die_error(400, "Missing one of the blob diff parameters");
5895                 }
5896
5897                 if (@difftree > 1) {
5898                         die_error(400, "Ambiguous blob diff specification");
5899                 }
5900
5901                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5902                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5903                 $file_name   ||= $diffinfo{'to_file'};
5904
5905                 $hash_parent ||= $diffinfo{'from_id'};
5906                 $hash        ||= $diffinfo{'to_id'};
5907
5908                 # non-textual hash id's can be cached
5909                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5910                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5911                         $expires = '+1d';
5912                 }
5913
5914                 # open patch output
5915                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5916                         '-p', ($format eq 'html' ? "--full-index" : ()),
5917                         $hash_parent_base, $hash_base,
5918                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5919                         or die_error(500, "Open git-diff-tree failed");
5920         }
5921
5922         # old/legacy style URI -- not generated anymore since 1.4.3.
5923         if (!%diffinfo) {
5924                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5925         }
5926
5927         # header
5928         if ($format eq 'html') {
5929                 my $formats_nav =
5930                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5931                                 "raw");
5932                 git_header_html(undef, $expires);
5933                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5934                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5935                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5936                 } else {
5937                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5938                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
5939                 }
5940                 if (defined $file_name) {
5941                         git_print_page_path($file_name, "blob", $hash_base);
5942                 } else {
5943                         print "<div class=\"page_path\"></div>\n";
5944                 }
5945
5946         } elsif ($format eq 'plain') {
5947                 print $cgi->header(
5948                         -type => 'text/plain',
5949                         -charset => 'utf-8',
5950                         -expires => $expires,
5951                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5952
5953                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5954
5955         } else {
5956                 die_error(400, "Unknown blobdiff format");
5957         }
5958
5959         # patch
5960         if ($format eq 'html') {
5961                 print "<div class=\"page_body\">\n";
5962
5963                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5964                 close $fd;
5965
5966                 print "</div>\n"; # class="page_body"
5967                 git_footer_html();
5968
5969         } else {
5970                 while (my $line = <$fd>) {
5971                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5972                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5973
5974                         print $line;
5975
5976                         last if $line =~ m!^\+\+\+!;
5977                 }
5978                 local $/ = undef;
5979                 print <$fd>;
5980                 close $fd;
5981         }
5982 }
5983
5984 sub git_blobdiff_plain {
5985         git_blobdiff('plain');
5986 }
5987
5988 sub git_commitdiff {
5989         my %params = @_;
5990         my $format = $params{-format} || 'html';
5991
5992         my ($patch_max) = gitweb_get_feature('patches');
5993         if ($format eq 'patch') {
5994                 die_error(403, "Patch view not allowed") unless $patch_max;
5995         }
5996
5997         $hash ||= $hash_base || "HEAD";
5998         my %co = parse_commit($hash)
5999             or die_error(404, "Unknown commit object");
6000
6001         # choose format for commitdiff for merge
6002         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6003                 $hash_parent = '--cc';
6004         }
6005         # we need to prepare $formats_nav before almost any parameter munging
6006         my $formats_nav;
6007         if ($format eq 'html') {
6008                 $formats_nav =
6009                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6010                                 "raw");
6011                 if ($patch_max && @{$co{'parents'}} <= 1) {
6012                         $formats_nav .= " | " .
6013                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6014                                         "patch");
6015                 }
6016
6017                 if (defined $hash_parent &&
6018                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6019                         # commitdiff with two commits given
6020                         my $hash_parent_short = $hash_parent;
6021                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6022                                 $hash_parent_short = substr($hash_parent, 0, 7);
6023                         }
6024                         $formats_nav .=
6025                                 ' (from';
6026                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6027                                 if ($co{'parents'}[$i] eq $hash_parent) {
6028                                         $formats_nav .= ' parent ' . ($i+1);
6029                                         last;
6030                                 }
6031                         }
6032                         $formats_nav .= ': ' .
6033                                 $cgi->a({-href => href(action=>"commitdiff",
6034                                                        hash=>$hash_parent)},
6035                                         esc_html($hash_parent_short)) .
6036                                 ')';
6037                 } elsif (!$co{'parent'}) {
6038                         # --root commitdiff
6039                         $formats_nav .= ' (initial)';
6040                 } elsif (scalar @{$co{'parents'}} == 1) {
6041                         # single parent commit
6042                         $formats_nav .=
6043                                 ' (parent: ' .
6044                                 $cgi->a({-href => href(action=>"commitdiff",
6045                                                        hash=>$co{'parent'})},
6046                                         esc_html(substr($co{'parent'}, 0, 7))) .
6047                                 ')';
6048                 } else {
6049                         # merge commit
6050                         if ($hash_parent eq '--cc') {
6051                                 $formats_nav .= ' | ' .
6052                                         $cgi->a({-href => href(action=>"commitdiff",
6053                                                                hash=>$hash, hash_parent=>'-c')},
6054                                                 'combined');
6055                         } else { # $hash_parent eq '-c'
6056                                 $formats_nav .= ' | ' .
6057                                         $cgi->a({-href => href(action=>"commitdiff",
6058                                                                hash=>$hash, hash_parent=>'--cc')},
6059                                                 'compact');
6060                         }
6061                         $formats_nav .=
6062                                 ' (merge: ' .
6063                                 join(' ', map {
6064                                         $cgi->a({-href => href(action=>"commitdiff",
6065                                                                hash=>$_)},
6066                                                 esc_html(substr($_, 0, 7)));
6067                                 } @{$co{'parents'}} ) .
6068                                 ')';
6069                 }
6070         }
6071
6072         my $hash_parent_param = $hash_parent;
6073         if (!defined $hash_parent_param) {
6074                 # --cc for multiple parents, --root for parentless
6075                 $hash_parent_param =
6076                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6077         }
6078
6079         # read commitdiff
6080         my $fd;
6081         my @difftree;
6082         if ($format eq 'html') {
6083                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6084                         "--no-commit-id", "--patch-with-raw", "--full-index",
6085                         $hash_parent_param, $hash, "--"
6086                         or die_error(500, "Open git-diff-tree failed");
6087
6088                 while (my $line = <$fd>) {
6089                         chomp $line;
6090                         # empty line ends raw part of diff-tree output
6091                         last unless $line;
6092                         push @difftree, scalar parse_difftree_raw_line($line);
6093                 }
6094
6095         } elsif ($format eq 'plain') {
6096                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6097                         '-p', $hash_parent_param, $hash, "--"
6098                         or die_error(500, "Open git-diff-tree failed");
6099         } elsif ($format eq 'patch') {
6100                 # For commit ranges, we limit the output to the number of
6101                 # patches specified in the 'patches' feature.
6102                 # For single commits, we limit the output to a single patch,
6103                 # diverging from the git-format-patch default.
6104                 my @commit_spec = ();
6105                 if ($hash_parent) {
6106                         if ($patch_max > 0) {
6107                                 push @commit_spec, "-$patch_max";
6108                         }
6109                         push @commit_spec, '-n', "$hash_parent..$hash";
6110                 } else {
6111                         if ($params{-single}) {
6112                                 push @commit_spec, '-1';
6113                         } else {
6114                                 if ($patch_max > 0) {
6115                                         push @commit_spec, "-$patch_max";
6116                                 }
6117                                 push @commit_spec, "-n";
6118                         }
6119                         push @commit_spec, '--root', $hash;
6120                 }
6121                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6122                         '--stdout', @commit_spec
6123                         or die_error(500, "Open git-format-patch failed");
6124         } else {
6125                 die_error(400, "Unknown commitdiff format");
6126         }
6127
6128         # non-textual hash id's can be cached
6129         my $expires;
6130         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6131                 $expires = "+1d";
6132         }
6133
6134         # write commit message
6135         if ($format eq 'html') {
6136                 my $refs = git_get_references();
6137                 my $ref = format_ref_marker($refs, $co{'id'});
6138
6139                 git_header_html(undef, $expires);
6140                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6141                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6142                 print "<div class=\"title_text\">\n" .
6143                       "<table class=\"object_header\">\n";
6144                 git_print_authorship_rows(\%co);
6145                 print "</table>".
6146                       "</div>\n";
6147                 print "<div class=\"page_body\">\n";
6148                 if (@{$co{'comment'}} > 1) {
6149                         print "<div class=\"log\">\n";
6150                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6151                         print "</div>\n"; # class="log"
6152                 }
6153
6154         } elsif ($format eq 'plain') {
6155                 my $refs = git_get_references("tags");
6156                 my $tagname = git_get_rev_name_tags($hash);
6157                 my $filename = basename($project) . "-$hash.patch";
6158
6159                 print $cgi->header(
6160                         -type => 'text/plain',
6161                         -charset => 'utf-8',
6162                         -expires => $expires,
6163                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6164                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6165                 print "From: " . to_utf8($co{'author'}) . "\n";
6166                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6167                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6168
6169                 print "X-Git-Tag: $tagname\n" if $tagname;
6170                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6171
6172                 foreach my $line (@{$co{'comment'}}) {
6173                         print to_utf8($line) . "\n";
6174                 }
6175                 print "---\n\n";
6176         } elsif ($format eq 'patch') {
6177                 my $filename = basename($project) . "-$hash.patch";
6178
6179                 print $cgi->header(
6180                         -type => 'text/plain',
6181                         -charset => 'utf-8',
6182                         -expires => $expires,
6183                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6184         }
6185
6186         # write patch
6187         if ($format eq 'html') {
6188                 my $use_parents = !defined $hash_parent ||
6189                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6190                 git_difftree_body(\@difftree, $hash,
6191                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6192                 print "<br/>\n";
6193
6194                 git_patchset_body($fd, \@difftree, $hash,
6195                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6196                 close $fd;
6197                 print "</div>\n"; # class="page_body"
6198                 git_footer_html();
6199
6200         } elsif ($format eq 'plain') {
6201                 local $/ = undef;
6202                 print <$fd>;
6203                 close $fd
6204                         or print "Reading git-diff-tree failed\n";
6205         } elsif ($format eq 'patch') {
6206                 local $/ = undef;
6207                 print <$fd>;
6208                 close $fd
6209                         or print "Reading git-format-patch failed\n";
6210         }
6211 }
6212
6213 sub git_commitdiff_plain {
6214         git_commitdiff(-format => 'plain');
6215 }
6216
6217 # format-patch-style patches
6218 sub git_patch {
6219         git_commitdiff(-format => 'patch', -single => 1);
6220 }
6221
6222 sub git_patches {
6223         git_commitdiff(-format => 'patch');
6224 }
6225
6226 sub git_history {
6227         git_log_generic('history', \&git_history_body,
6228                         $hash_base, $hash_parent_base,
6229                         $file_name, $hash);
6230 }
6231
6232 sub git_search {
6233         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6234         if (!defined $searchtext) {
6235                 die_error(400, "Text field is empty");
6236         }
6237         if (!defined $hash) {
6238                 $hash = git_get_head_hash($project);
6239         }
6240         my %co = parse_commit($hash);
6241         if (!%co) {
6242                 die_error(404, "Unknown commit object");
6243         }
6244         if (!defined $page) {
6245                 $page = 0;
6246         }
6247
6248         $searchtype ||= 'commit';
6249         if ($searchtype eq 'pickaxe') {
6250                 # pickaxe may take all resources of your box and run for several minutes
6251                 # with every query - so decide by yourself how public you make this feature
6252                 gitweb_check_feature('pickaxe')
6253                     or die_error(403, "Pickaxe is disabled");
6254         }
6255         if ($searchtype eq 'grep') {
6256                 gitweb_check_feature('grep')
6257                     or die_error(403, "Grep is disabled");
6258         }
6259
6260         git_header_html();
6261
6262         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6263                 my $greptype;
6264                 if ($searchtype eq 'commit') {
6265                         $greptype = "--grep=";
6266                 } elsif ($searchtype eq 'author') {
6267                         $greptype = "--author=";
6268                 } elsif ($searchtype eq 'committer') {
6269                         $greptype = "--committer=";
6270                 }
6271                 $greptype .= $searchtext;
6272                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6273                                                $greptype, '--regexp-ignore-case',
6274                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6275
6276                 my $paging_nav = '';
6277                 if ($page > 0) {
6278                         $paging_nav .=
6279                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6280                                                        searchtext=>$searchtext,
6281                                                        searchtype=>$searchtype)},
6282                                         "first");
6283                         $paging_nav .= " &sdot; " .
6284                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6285                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6286                 } else {
6287                         $paging_nav .= "first";
6288                         $paging_nav .= " &sdot; prev";
6289                 }
6290                 my $next_link = '';
6291                 if ($#commitlist >= 100) {
6292                         $next_link =
6293                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6294                                          -accesskey => "n", -title => "Alt-n"}, "next");
6295                         $paging_nav .= " &sdot; $next_link";
6296                 } else {
6297                         $paging_nav .= " &sdot; next";
6298                 }
6299
6300                 if ($#commitlist >= 100) {
6301                 }
6302
6303                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6304                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6305                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6306         }
6307
6308         if ($searchtype eq 'pickaxe') {
6309                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6310                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6311
6312                 print "<table class=\"pickaxe search\">\n";
6313                 my $alternate = 1;
6314                 local $/ = "\n";
6315                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6316                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6317                         ($search_use_regexp ? '--pickaxe-regex' : ());
6318                 undef %co;
6319                 my @files;
6320                 while (my $line = <$fd>) {
6321                         chomp $line;
6322                         next unless $line;
6323
6324                         my %set = parse_difftree_raw_line($line);
6325                         if (defined $set{'commit'}) {
6326                                 # finish previous commit
6327                                 if (%co) {
6328                                         print "</td>\n" .
6329                                               "<td class=\"link\">" .
6330                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6331                                               " | " .
6332                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6333                                         print "</td>\n" .
6334                                               "</tr>\n";
6335                                 }
6336
6337                                 if ($alternate) {
6338                                         print "<tr class=\"dark\">\n";
6339                                 } else {
6340                                         print "<tr class=\"light\">\n";
6341                                 }
6342                                 $alternate ^= 1;
6343                                 %co = parse_commit($set{'commit'});
6344                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6345                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6346                                       "<td><i>$author</i></td>\n" .
6347                                       "<td>" .
6348                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6349                                               -class => "list subject"},
6350                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6351                         } elsif (defined $set{'to_id'}) {
6352                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6353
6354                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6355                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6356                                               -class => "list"},
6357                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6358                                       "<br/>\n";
6359                         }
6360                 }
6361                 close $fd;
6362
6363                 # finish last commit (warning: repetition!)
6364                 if (%co) {
6365                         print "</td>\n" .
6366                               "<td class=\"link\">" .
6367                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6368                               " | " .
6369                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6370                         print "</td>\n" .
6371                               "</tr>\n";
6372                 }
6373
6374                 print "</table>\n";
6375         }
6376
6377         if ($searchtype eq 'grep') {
6378                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6379                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6380
6381                 print "<table class=\"grep_search\">\n";
6382                 my $alternate = 1;
6383                 my $matches = 0;
6384                 local $/ = "\n";
6385                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6386                         $search_use_regexp ? ('-E', '-i') : '-F',
6387                         $searchtext, $co{'tree'};
6388                 my $lastfile = '';
6389                 while (my $line = <$fd>) {
6390                         chomp $line;
6391                         my ($file, $lno, $ltext, $binary);
6392                         last if ($matches++ > 1000);
6393                         if ($line =~ /^Binary file (.+) matches$/) {
6394                                 $file = $1;
6395                                 $binary = 1;
6396                         } else {
6397                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6398                         }
6399                         if ($file ne $lastfile) {
6400                                 $lastfile and print "</td></tr>\n";
6401                                 if ($alternate++) {
6402                                         print "<tr class=\"dark\">\n";
6403                                 } else {
6404                                         print "<tr class=\"light\">\n";
6405                                 }
6406                                 print "<td class=\"list\">".
6407                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6408                                                                file_name=>"$file"),
6409                                                 -class => "list"}, esc_path($file));
6410                                 print "</td><td>\n";
6411                                 $lastfile = $file;
6412                         }
6413                         if ($binary) {
6414                                 print "<div class=\"binary\">Binary file</div>\n";
6415                         } else {
6416                                 $ltext = untabify($ltext);
6417                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6418                                         $ltext = esc_html($1, -nbsp=>1);
6419                                         $ltext .= '<span class="match">';
6420                                         $ltext .= esc_html($2, -nbsp=>1);
6421                                         $ltext .= '</span>';
6422                                         $ltext .= esc_html($3, -nbsp=>1);
6423                                 } else {
6424                                         $ltext = esc_html($ltext, -nbsp=>1);
6425                                 }
6426                                 print "<div class=\"pre\">" .
6427                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6428                                                                file_name=>"$file").'#l'.$lno,
6429                                                 -class => "linenr"}, sprintf('%4i', $lno))
6430                                         . ' ' .  $ltext . "</div>\n";
6431                         }
6432                 }
6433                 if ($lastfile) {
6434                         print "</td></tr>\n";
6435                         if ($matches > 1000) {
6436                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6437                         }
6438                 } else {
6439                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6440                 }
6441                 close $fd;
6442
6443                 print "</table>\n";
6444         }
6445         git_footer_html();
6446 }
6447
6448 sub git_search_help {
6449         git_header_html();
6450         git_print_page_nav('','', $hash,$hash,$hash);
6451         print <<EOT;
6452 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6453 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6454 the pattern entered is recognized as the POSIX extended
6455 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6456 insensitive).</p>
6457 <dl>
6458 <dt><b>commit</b></dt>
6459 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6460 EOT
6461         my $have_grep = gitweb_check_feature('grep');
6462         if ($have_grep) {
6463                 print <<EOT;
6464 <dt><b>grep</b></dt>
6465 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6466     a different one) are searched for the given pattern. On large trees, this search can take
6467 a while and put some strain on the server, so please use it with some consideration. Note that
6468 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6469 case-sensitive.</dd>
6470 EOT
6471         }
6472         print <<EOT;
6473 <dt><b>author</b></dt>
6474 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6475 <dt><b>committer</b></dt>
6476 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6477 EOT
6478         my $have_pickaxe = gitweb_check_feature('pickaxe');
6479         if ($have_pickaxe) {
6480                 print <<EOT;
6481 <dt><b>pickaxe</b></dt>
6482 <dd>All commits that caused the string to appear or disappear from any file (changes that
6483 added, removed or "modified" the string) will be listed. This search can take a while and
6484 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6485 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6486 EOT
6487         }
6488         print "</dl>\n";
6489         git_footer_html();
6490 }
6491
6492 sub git_shortlog {
6493         git_log_generic('shortlog', \&git_shortlog_body,
6494                         $hash, $hash_parent);
6495 }
6496
6497 ## ......................................................................
6498 ## feeds (RSS, Atom; OPML)
6499
6500 sub git_feed {
6501         my $format = shift || 'atom';
6502         my $have_blame = gitweb_check_feature('blame');
6503
6504         # Atom: http://www.atomenabled.org/developers/syndication/
6505         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6506         if ($format ne 'rss' && $format ne 'atom') {
6507                 die_error(400, "Unknown web feed format");
6508         }
6509
6510         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6511         my $head = $hash || 'HEAD';
6512         my @commitlist = parse_commits($head, 150, 0, $file_name);
6513
6514         my %latest_commit;
6515         my %latest_date;
6516         my $content_type = "application/$format+xml";
6517         if (defined $cgi->http('HTTP_ACCEPT') &&
6518                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6519                 # browser (feed reader) prefers text/xml
6520                 $content_type = 'text/xml';
6521         }
6522         if (defined($commitlist[0])) {
6523                 %latest_commit = %{$commitlist[0]};
6524                 my $latest_epoch = $latest_commit{'committer_epoch'};
6525                 %latest_date   = parse_date($latest_epoch);
6526                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6527                 if (defined $if_modified) {
6528                         my $since;
6529                         if (eval { require HTTP::Date; 1; }) {
6530                                 $since = HTTP::Date::str2time($if_modified);
6531                         } elsif (eval { require Time::ParseDate; 1; }) {
6532                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6533                         }
6534                         if (defined $since && $latest_epoch <= $since) {
6535                                 print $cgi->header(
6536                                         -type => $content_type,
6537                                         -charset => 'utf-8',
6538                                         -last_modified => $latest_date{'rfc2822'},
6539                                         -status => '304 Not Modified');
6540                                 return;
6541                         }
6542                 }
6543                 print $cgi->header(
6544                         -type => $content_type,
6545                         -charset => 'utf-8',
6546                         -last_modified => $latest_date{'rfc2822'});
6547         } else {
6548                 print $cgi->header(
6549                         -type => $content_type,
6550                         -charset => 'utf-8');
6551         }
6552
6553         # Optimization: skip generating the body if client asks only
6554         # for Last-Modified date.
6555         return if ($cgi->request_method() eq 'HEAD');
6556
6557         # header variables
6558         my $title = "$site_name - $project/$action";
6559         my $feed_type = 'log';
6560         if (defined $hash) {
6561                 $title .= " - '$hash'";
6562                 $feed_type = 'branch log';
6563                 if (defined $file_name) {
6564                         $title .= " :: $file_name";
6565                         $feed_type = 'history';
6566                 }
6567         } elsif (defined $file_name) {
6568                 $title .= " - $file_name";
6569                 $feed_type = 'history';
6570         }
6571         $title .= " $feed_type";
6572         my $descr = git_get_project_description($project);
6573         if (defined $descr) {
6574                 $descr = esc_html($descr);
6575         } else {
6576                 $descr = "$project " .
6577                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6578                          " feed";
6579         }
6580         my $owner = git_get_project_owner($project);
6581         $owner = esc_html($owner);
6582
6583         #header
6584         my $alt_url;
6585         if (defined $file_name) {
6586                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6587         } elsif (defined $hash) {
6588                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6589         } else {
6590                 $alt_url = href(-full=>1, action=>"summary");
6591         }
6592         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6593         if ($format eq 'rss') {
6594                 print <<XML;
6595 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6596 <channel>
6597 XML
6598                 print "<title>$title</title>\n" .
6599                       "<link>$alt_url</link>\n" .
6600                       "<description>$descr</description>\n" .
6601                       "<language>en</language>\n" .
6602                       # project owner is responsible for 'editorial' content
6603                       "<managingEditor>$owner</managingEditor>\n";
6604                 if (defined $logo || defined $favicon) {
6605                         # prefer the logo to the favicon, since RSS
6606                         # doesn't allow both
6607                         my $img = esc_url($logo || $favicon);
6608                         print "<image>\n" .
6609                               "<url>$img</url>\n" .
6610                               "<title>$title</title>\n" .
6611                               "<link>$alt_url</link>\n" .
6612                               "</image>\n";
6613                 }
6614                 if (%latest_date) {
6615                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6616                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6617                 }
6618                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6619         } elsif ($format eq 'atom') {
6620                 print <<XML;
6621 <feed xmlns="http://www.w3.org/2005/Atom">
6622 XML
6623                 print "<title>$title</title>\n" .
6624                       "<subtitle>$descr</subtitle>\n" .
6625                       '<link rel="alternate" type="text/html" href="' .
6626                       $alt_url . '" />' . "\n" .
6627                       '<link rel="self" type="' . $content_type . '" href="' .
6628                       $cgi->self_url() . '" />' . "\n" .
6629                       "<id>" . href(-full=>1) . "</id>\n" .
6630                       # use project owner for feed author
6631                       "<author><name>$owner</name></author>\n";
6632                 if (defined $favicon) {
6633                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6634                 }
6635                 if (defined $logo_url) {
6636                         # not twice as wide as tall: 72 x 27 pixels
6637                         print "<logo>" . esc_url($logo) . "</logo>\n";
6638                 }
6639                 if (! %latest_date) {
6640                         # dummy date to keep the feed valid until commits trickle in:
6641                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6642                 } else {
6643                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6644                 }
6645                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6646         }
6647
6648         # contents
6649         for (my $i = 0; $i <= $#commitlist; $i++) {
6650                 my %co = %{$commitlist[$i]};
6651                 my $commit = $co{'id'};
6652                 # we read 150, we always show 30 and the ones more recent than 48 hours
6653                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6654                         last;
6655                 }
6656                 my %cd = parse_date($co{'author_epoch'});
6657
6658                 # get list of changed files
6659                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6660                         $co{'parent'} || "--root",
6661                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6662                         or next;
6663                 my @difftree = map { chomp; $_ } <$fd>;
6664                 close $fd
6665                         or next;
6666
6667                 # print element (entry, item)
6668                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6669                 if ($format eq 'rss') {
6670                         print "<item>\n" .
6671                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6672                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6673                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6674                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6675                               "<link>$co_url</link>\n" .
6676                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6677                               "<content:encoded>" .
6678                               "<![CDATA[\n";
6679                 } elsif ($format eq 'atom') {
6680                         print "<entry>\n" .
6681                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6682                               "<updated>$cd{'iso-8601'}</updated>\n" .
6683                               "<author>\n" .
6684                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6685                         if ($co{'author_email'}) {
6686                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6687                         }
6688                         print "</author>\n" .
6689                               # use committer for contributor
6690                               "<contributor>\n" .
6691                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6692                         if ($co{'committer_email'}) {
6693                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6694                         }
6695                         print "</contributor>\n" .
6696                               "<published>$cd{'iso-8601'}</published>\n" .
6697                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6698                               "<id>$co_url</id>\n" .
6699                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6700                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6701                 }
6702                 my $comment = $co{'comment'};
6703                 print "<pre>\n";
6704                 foreach my $line (@$comment) {
6705                         $line = esc_html($line);
6706                         print "$line\n";
6707                 }
6708                 print "</pre><ul>\n";
6709                 foreach my $difftree_line (@difftree) {
6710                         my %difftree = parse_difftree_raw_line($difftree_line);
6711                         next if !$difftree{'from_id'};
6712
6713                         my $file = $difftree{'file'} || $difftree{'to_file'};
6714
6715                         print "<li>" .
6716                               "[" .
6717                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6718                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6719                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6720                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6721                                       -title => "diff"}, 'D');
6722                         if ($have_blame) {
6723                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6724                                                              file_name=>$file, hash_base=>$commit),
6725                                               -title => "blame"}, 'B');
6726                         }
6727                         # if this is not a feed of a file history
6728                         if (!defined $file_name || $file_name ne $file) {
6729                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6730                                                              file_name=>$file, hash=>$commit),
6731                                               -title => "history"}, 'H');
6732                         }
6733                         $file = esc_path($file);
6734                         print "] ".
6735                               "$file</li>\n";
6736                 }
6737                 if ($format eq 'rss') {
6738                         print "</ul>]]>\n" .
6739                               "</content:encoded>\n" .
6740                               "</item>\n";
6741                 } elsif ($format eq 'atom') {
6742                         print "</ul>\n</div>\n" .
6743                               "</content>\n" .
6744                               "</entry>\n";
6745                 }
6746         }
6747
6748         # end of feed
6749         if ($format eq 'rss') {
6750                 print "</channel>\n</rss>\n";
6751         } elsif ($format eq 'atom') {
6752                 print "</feed>\n";
6753         }
6754 }
6755
6756 sub git_rss {
6757         git_feed('rss');
6758 }
6759
6760 sub git_atom {
6761         git_feed('atom');
6762 }
6763
6764 sub git_opml {
6765         my @list = git_get_projects_list();
6766
6767         print $cgi->header(
6768                 -type => 'text/xml',
6769                 -charset => 'utf-8',
6770                 -content_disposition => 'inline; filename="opml.xml"');
6771
6772         print <<XML;
6773 <?xml version="1.0" encoding="utf-8"?>
6774 <opml version="1.0">
6775 <head>
6776   <title>$site_name OPML Export</title>
6777 </head>
6778 <body>
6779 <outline text="git RSS feeds">
6780 XML
6781
6782         foreach my $pr (@list) {
6783                 my %proj = %$pr;
6784                 my $head = git_get_head_hash($proj{'path'});
6785                 if (!defined $head) {
6786                         next;
6787                 }
6788                 $git_dir = "$projectroot/$proj{'path'}";
6789                 my %co = parse_commit($head);
6790                 if (!%co) {
6791                         next;
6792                 }
6793
6794                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6795                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6796                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6797                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6798         }
6799         print <<XML;
6800 </outline>
6801 </body>
6802 </opml>
6803 XML
6804 }