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