Lady’s Gitweb - Gitweb/blob - gitweb.perl

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