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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95
  96 # URI of GIT logo (72x27 size)
  97 our $logo = "++GITWEB_LOGO++";
  98 # URI of GIT favicon, assumed to be image/png type
  99 our $favicon = "++GITWEB_FAVICON++";
 100 # URI of gitweb.js (JavaScript code for gitweb)
 101 our $javascript = "++GITWEB_JS++";
 102
 103 # URI and label (title) of GIT logo link
 104 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 105 #our $logo_label = "git documentation";
 106 our $logo_url = "http://git-scm.com/";
 107 our $logo_label = "git homepage";
 108
 109 # source of projects list
 110 our $projects_list = "++GITWEB_LIST++";
 111
 112 # the width (in characters) of the projects list "Description" column
 113 our $projects_list_description_width = 25;
 114
 115 # default order of projects list
 116 # valid values are none, project, descr, owner, and age
 117 our $default_projects_order = "project";
 118
 119 # show repository only if this file exists
 120 # (only effective if this variable evaluates to true)
 121 our $export_ok = "++GITWEB_EXPORT_OK++";
 122
 123 # show repository only if this subroutine returns true
 124 # when given the path to the project, for example:
 125 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 126 our $export_auth_hook = undef;
 127
 128 # only allow viewing of repositories also shown on the overview page
 129 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 130
 131 # list of git base URLs used for URL to where fetch project from,
 132 # i.e. full URL is "$git_base_url/$project"
 133 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 134
 135 # default blob_plain mimetype and default charset for text/plain blob
 136 our $default_blob_plain_mimetype = 'text/plain';
 137 our $default_text_plain_charset  = undef;
 138
 139 # file to use for guessing MIME types before trying /etc/mime.types
 140 # (relative to the current git repository)
 141 our $mimetypes_file = undef;
 142
 143 # assume this charset if line contains non-UTF-8 characters;
 144 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 145 # for which encoding all byte sequences are valid, for example
 146 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 147 # could be even 'utf-8' for the old behavior)
 148 our $fallback_encoding = 'latin1';
 149
 150 # rename detection options for git-diff and git-diff-tree
 151 # - default is '-M', with the cost proportional to
 152 #   (number of removed files) * (number of new files).
 153 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 154 #   (number of changed files + number of removed files) * (number of new files)
 155 # - even more costly is '-C', '--find-copies-harder' with cost
 156 #   (number of files in the original tree) * (number of new files)
 157 # - one might want to include '-B' option, e.g. '-B', '-M'
 158 our @diff_opts = ('-M'); # taken from git_commit
 159
 160 # Disables features that would allow repository owners to inject script into
 161 # the gitweb domain.
 162 our $prevent_xss = 0;
 163
 164 # information about snapshot formats that gitweb is capable of serving
 165 our %known_snapshot_formats = (
 166         # name => {
 167         #       'display' => display name,
 168         #       'type' => mime type,
 169         #       'suffix' => filename suffix,
 170         #       'format' => --format for git-archive,
 171         #       'compressor' => [compressor command and arguments]
 172         #                       (array reference, optional)
 173         #       'disabled' => boolean (optional)}
 174         #
 175         'tgz' => {
 176                 'display' => 'tar.gz',
 177                 'type' => 'application/x-gzip',
 178                 'suffix' => '.tar.gz',
 179                 'format' => 'tar',
 180                 'compressor' => ['gzip']},
 181
 182         'tbz2' => {
 183                 'display' => 'tar.bz2',
 184                 'type' => 'application/x-bzip2',
 185                 'suffix' => '.tar.bz2',
 186                 'format' => 'tar',
 187                 'compressor' => ['bzip2']},
 188
 189         'txz' => {
 190                 'display' => 'tar.xz',
 191                 'type' => 'application/x-xz',
 192                 'suffix' => '.tar.xz',
 193                 'format' => 'tar',
 194                 'compressor' => ['xz'],
 195                 'disabled' => 1},
 196
 197         'zip' => {
 198                 'display' => 'zip',
 199                 'type' => 'application/x-zip',
 200                 'suffix' => '.zip',
 201                 'format' => 'zip'},
 202 );
 203
 204 # Aliases so we understand old gitweb.snapshot values in repository
 205 # configuration.
 206 our %known_snapshot_format_aliases = (
 207         'gzip'  => 'tgz',
 208         'bzip2' => 'tbz2',
 209         'xz'    => 'txz',
 210
 211         # backward compatibility: legacy gitweb config support
 212         'x-gzip' => undef, 'gz' => undef,
 213         'x-bzip2' => undef, 'bz2' => undef,
 214         'x-zip' => undef, '' => undef,
 215 );
 216
 217 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 218 # are changed, it may be appropriate to change these values too via
 219 # $GITWEB_CONFIG.
 220 our %avatar_size = (
 221         'default' => 16,
 222         'double'  => 32
 223 );
 224
 225 # Used to set the maximum load that we will still respond to gitweb queries.
 226 # If server load exceed this value then return "503 server busy" error.
 227 # If gitweb cannot determined server load, it is taken to be 0.
 228 # Leave it undefined (or set to 'undef') to turn off load checking.
 229 our $maxload = 300;
 230
 231 # You define site-wide feature defaults here; override them with
 232 # $GITWEB_CONFIG as necessary.
 233 our %feature = (
 234         # feature => {
 235         #       'sub' => feature-sub (subroutine),
 236         #       'override' => allow-override (boolean),
 237         #       'default' => [ default options...] (array reference)}
 238         #
 239         # if feature is overridable (it means that allow-override has true value),
 240         # then feature-sub will be called with default options as parameters;
 241         # return value of feature-sub indicates if to enable specified feature
 242         #
 243         # if there is no 'sub' key (no feature-sub), then feature cannot be
 244         # overriden
 245         #
 246         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 247         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 248         # is enabled
 249
 250         # Enable the 'blame' blob view, showing the last commit that modified
 251         # each line in the file. This can be very CPU-intensive.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'blame'}{'default'} = [1];
 255         # To have project specific config enable override in $GITWEB_CONFIG
 256         # $feature{'blame'}{'override'} = 1;
 257         # and in project config gitweb.blame = 0|1;
 258         'blame' => {
 259                 'sub' => sub { feature_bool('blame', @_) },
 260                 'override' => 0,
 261                 'default' => [0]},
 262
 263         # Enable the 'snapshot' link, providing a compressed archive of any
 264         # tree. This can potentially generate high traffic if you have large
 265         # project.
 266
 267         # Value is a list of formats defined in %known_snapshot_formats that
 268         # you wish to offer.
 269         # To disable system wide have in $GITWEB_CONFIG
 270         # $feature{'snapshot'}{'default'} = [];
 271         # To have project specific config enable override in $GITWEB_CONFIG
 272         # $feature{'snapshot'}{'override'} = 1;
 273         # and in project config, a comma-separated list of formats or "none"
 274         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 275         'snapshot' => {
 276                 'sub' => \&feature_snapshot,
 277                 'override' => 0,
 278                 'default' => ['tgz']},
 279
 280         # Enable text search, which will list the commits which match author,
 281         # committer or commit text to a given string.  Enabled by default.
 282         # Project specific override is not supported.
 283         'search' => {
 284                 'override' => 0,
 285                 'default' => [1]},
 286
 287         # Enable grep search, which will list the files in currently selected
 288         # tree containing the given string. Enabled by default. This can be
 289         # potentially CPU-intensive, of course.
 290
 291         # To enable system wide have in $GITWEB_CONFIG
 292         # $feature{'grep'}{'default'} = [1];
 293         # To have project specific config enable override in $GITWEB_CONFIG
 294         # $feature{'grep'}{'override'} = 1;
 295         # and in project config gitweb.grep = 0|1;
 296         'grep' => {
 297                 'sub' => sub { feature_bool('grep', @_) },
 298                 'override' => 0,
 299                 'default' => [1]},
 300
 301         # Enable the pickaxe search, which will list the commits that modified
 302         # a given string in a file. This can be practical and quite faster
 303         # alternative to 'blame', but still potentially CPU-intensive.
 304
 305         # To enable system wide have in $GITWEB_CONFIG
 306         # $feature{'pickaxe'}{'default'} = [1];
 307         # To have project specific config enable override in $GITWEB_CONFIG
 308         # $feature{'pickaxe'}{'override'} = 1;
 309         # and in project config gitweb.pickaxe = 0|1;
 310         'pickaxe' => {
 311                 'sub' => sub { feature_bool('pickaxe', @_) },
 312                 'override' => 0,
 313                 'default' => [1]},
 314
 315         # Enable showing size of blobs in a 'tree' view, in a separate
 316         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 317
 318         # To disable system wide have in $GITWEB_CONFIG
 319         # $feature{'show-sizes'}{'default'} = [0];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'show-sizes'}{'override'} = 1;
 322         # and in project config gitweb.showsizes = 0|1;
 323         'show-sizes' => {
 324                 'sub' => sub { feature_bool('showsizes', @_) },
 325                 'override' => 0,
 326                 'default' => [1]},
 327
 328         # Make gitweb use an alternative format of the URLs which can be
 329         # more readable and natural-looking: project name is embedded
 330         # directly in the path and the query string contains other
 331         # auxiliary information. All gitweb installations recognize
 332         # URL in either format; this configures in which formats gitweb
 333         # generates links.
 334
 335         # To enable system wide have in $GITWEB_CONFIG
 336         # $feature{'pathinfo'}{'default'} = [1];
 337         # Project specific override is not supported.
 338
 339         # Note that you will need to change the default location of CSS,
 340         # favicon, logo and possibly other files to an absolute URL. Also,
 341         # if gitweb.cgi serves as your indexfile, you will need to force
 342         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 343         'pathinfo' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Make gitweb consider projects in project root subdirectories
 348         # to be forks of existing projects. Given project $projname.git,
 349         # projects matching $projname/*.git will not be shown in the main
 350         # projects list, instead a '+' mark will be added to $projname
 351         # there and a 'forks' view will be enabled for the project, listing
 352         # all the forks. If project list is taken from a file, forks have
 353         # to be listed after the main project.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'forks'}{'default'} = [1];
 357         # Project specific override is not supported.
 358         'forks' => {
 359                 'override' => 0,
 360                 'default' => [0]},
 361
 362         # Insert custom links to the action bar of all project pages.
 363         # This enables you mainly to link to third-party scripts integrating
 364         # into gitweb; e.g. git-browser for graphical history representation
 365         # or custom web-based repository administration interface.
 366
 367         # The 'default' value consists of a list of triplets in the form
 368         # (label, link, position) where position is the label after which
 369         # to insert the link and link is a format string where %n expands
 370         # to the project name, %f to the project path within the filesystem,
 371         # %h to the current hash (h gitweb parameter) and %b to the current
 372         # hash base (hb gitweb parameter); %% expands to %.
 373
 374         # To enable system wide have in $GITWEB_CONFIG e.g.
 375         # $feature{'actions'}{'default'} = [('graphiclog',
 376         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 377         # Project specific override is not supported.
 378         'actions' => {
 379                 'override' => 0,
 380                 'default' => []},
 381
 382         # Allow gitweb scan project content tags described in ctags/
 383         # of project repository, and display the popular Web 2.0-ish
 384         # "tag cloud" near the project list. Note that this is something
 385         # COMPLETELY different from the normal Git tags.
 386
 387         # gitweb by itself can show existing tags, but it does not handle
 388         # tagging itself; you need an external application for that.
 389         # For an example script, check Girocco's cgi/tagproj.cgi.
 390         # You may want to install the HTML::TagCloud Perl module to get
 391         # a pretty tag cloud instead of just a list of tags.
 392
 393         # To enable system wide have in $GITWEB_CONFIG
 394         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 395         # Project specific override is not supported.
 396         'ctags' => {
 397                 'override' => 0,
 398                 'default' => [0]},
 399
 400         # The maximum number of patches in a patchset generated in patch
 401         # view. Set this to 0 or undef to disable patch view, or to a
 402         # negative number to remove any limit.
 403
 404         # To disable system wide have in $GITWEB_CONFIG
 405         # $feature{'patches'}{'default'} = [0];
 406         # To have project specific config enable override in $GITWEB_CONFIG
 407         # $feature{'patches'}{'override'} = 1;
 408         # and in project config gitweb.patches = 0|n;
 409         # where n is the maximum number of patches allowed in a patchset.
 410         'patches' => {
 411                 'sub' => \&feature_patches,
 412                 'override' => 0,
 413                 'default' => [16]},
 414
 415         # Avatar support. When this feature is enabled, views such as
 416         # shortlog or commit will display an avatar associated with
 417         # the email of the committer(s) and/or author(s).
 418
 419         # Currently available providers are gravatar and picon.
 420         # If an unknown provider is specified, the feature is disabled.
 421
 422         # Gravatar depends on Digest::MD5.
 423         # Picon currently relies on the indiana.edu database.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'avatar'}{'default'} = ['<provider>'];
 427         # where <provider> is either gravatar or picon.
 428         # To have project specific config enable override in $GITWEB_CONFIG
 429         # $feature{'avatar'}{'override'} = 1;
 430         # and in project config gitweb.avatar = <provider>;
 431         'avatar' => {
 432                 'sub' => \&feature_avatar,
 433                 'override' => 0,
 434                 'default' => ['']},
 435
 436         # Enable displaying how much time and how many git commands
 437         # it took to generate and display page.  Disabled by default.
 438         # Project specific override is not supported.
 439         'timed' => {
 440                 'override' => 0,
 441                 'default' => [0]},
 442
 443         # Enable turning some links into links to actions which require
 444         # JavaScript to run (like 'blame_incremental').  Not enabled by
 445         # default.  Project specific override is currently not supported.
 446         'javascript-actions' => {
 447                 'override' => 0,
 448                 'default' => [0]},
 449 );
 450
 451 sub gitweb_get_feature {
 452         my ($name) = @_;
 453         return unless exists $feature{$name};
 454         my ($sub, $override, @defaults) = (
 455                 $feature{$name}{'sub'},
 456                 $feature{$name}{'override'},
 457                 @{$feature{$name}{'default'}});
 458         # project specific override is possible only if we have project
 459         our $git_dir; # global variable, declared later
 460         if (!$override || !defined $git_dir) {
 461                 return @defaults;
 462         }
 463         if (!defined $sub) {
 464                 warn "feature $name is not overridable";
 465                 return @defaults;
 466         }
 467         return $sub->(@defaults);
 468 }
 469
 470 # A wrapper to check if a given feature is enabled.
 471 # With this, you can say
 472 #
 473 #   my $bool_feat = gitweb_check_feature('bool_feat');
 474 #   gitweb_check_feature('bool_feat') or somecode;
 475 #
 476 # instead of
 477 #
 478 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 479 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 480 #
 481 sub gitweb_check_feature {
 482         return (gitweb_get_feature(@_))[0];
 483 }
 484
 485
 486 sub feature_bool {
 487         my $key = shift;
 488         my ($val) = git_get_project_config($key, '--bool');
 489
 490         if (!defined $val) {
 491                 return ($_[0]);
 492         } elsif ($val eq 'true') {
 493                 return (1);
 494         } elsif ($val eq 'false') {
 495                 return (0);
 496         }
 497 }
 498
 499 sub feature_snapshot {
 500         my (@fmts) = @_;
 501
 502         my ($val) = git_get_project_config('snapshot');
 503
 504         if ($val) {
 505                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 506         }
 507
 508         return @fmts;
 509 }
 510
 511 sub feature_patches {
 512         my @val = (git_get_project_config('patches', '--int'));
 513
 514         if (@val) {
 515                 return @val;
 516         }
 517
 518         return ($_[0]);
 519 }
 520
 521 sub feature_avatar {
 522         my @val = (git_get_project_config('avatar'));
 523
 524         return @val ? @val : @_;
 525 }
 526
 527 # checking HEAD file with -e is fragile if the repository was
 528 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 529 # and then pruned.
 530 sub check_head_link {
 531         my ($dir) = @_;
 532         my $headfile = "$dir/HEAD";
 533         return ((-e $headfile) ||
 534                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 535 }
 536
 537 sub check_export_ok {
 538         my ($dir) = @_;
 539         return (check_head_link($dir) &&
 540                 (!$export_ok || -e "$dir/$export_ok") &&
 541                 (!$export_auth_hook || $export_auth_hook->($dir)));
 542 }
 543
 544 # process alternate names for backward compatibility
 545 # filter out unsupported (unknown) snapshot formats
 546 sub filter_snapshot_fmts {
 547         my @fmts = @_;
 548
 549         @fmts = map {
 550                 exists $known_snapshot_format_aliases{$_} ?
 551                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 552         @fmts = grep {
 553                 exists $known_snapshot_formats{$_} &&
 554                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 555 }
 556
 557 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 558 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 559 # die if there are errors parsing config file
 560 if (-e $GITWEB_CONFIG) {
 561         do $GITWEB_CONFIG;
 562         die $@ if $@;
 563 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 564         do $GITWEB_CONFIG_SYSTEM;
 565         die $@ if $@;
 566 }
 567
 568 # Get loadavg of system, to compare against $maxload.
 569 # Currently it requires '/proc/loadavg' present to get loadavg;
 570 # if it is not present it returns 0, which means no load checking.
 571 sub get_loadavg {
 572         if( -e '/proc/loadavg' ){
 573                 open my $fd, '<', '/proc/loadavg'
 574                         or return 0;
 575                 my @load = split(/\s+/, scalar <$fd>);
 576                 close $fd;
 577
 578                 # The first three columns measure CPU and IO utilization of the last one,
 579                 # five, and 10 minute periods.  The fourth column shows the number of
 580                 # currently running processes and the total number of processes in the m/n
 581                 # format.  The last column displays the last process ID used.
 582                 return $load[0] || 0;
 583         }
 584         # additional checks for load average should go here for things that don't export
 585         # /proc/loadavg
 586
 587         return 0;
 588 }
 589
 590 # version of the core git binary
 591 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 592 $number_of_git_cmds++;
 593
 594 $projects_list ||= $projectroot;
 595
 596 if (defined $maxload && get_loadavg() > $maxload) {
 597         die_error(503, "The load average on the server is too high");
 598 }
 599
 600 # ======================================================================
 601 # input validation and dispatch
 602
 603 # input parameters can be collected from a variety of sources (presently, CGI
 604 # and PATH_INFO), so we define an %input_params hash that collects them all
 605 # together during validation: this allows subsequent uses (e.g. href()) to be
 606 # agnostic of the parameter origin
 607
 608 our %input_params = ();
 609
 610 # input parameters are stored with the long parameter name as key. This will
 611 # also be used in the href subroutine to convert parameters to their CGI
 612 # equivalent, and since the href() usage is the most frequent one, we store
 613 # the name -> CGI key mapping here, instead of the reverse.
 614 #
 615 # XXX: Warning: If you touch this, check the search form for updating,
 616 # too.
 617
 618 our @cgi_param_mapping = (
 619         project => "p",
 620         action => "a",
 621         file_name => "f",
 622         file_parent => "fp",
 623         hash => "h",
 624         hash_parent => "hp",
 625         hash_base => "hb",
 626         hash_parent_base => "hpb",
 627         page => "pg",
 628         order => "o",
 629         searchtext => "s",
 630         searchtype => "st",
 631         snapshot_format => "sf",
 632         extra_options => "opt",
 633         search_use_regexp => "sr",
 634         # this must be last entry (for manipulation from JavaScript)
 635         javascript => "js"
 636 );
 637 our %cgi_param_mapping = @cgi_param_mapping;
 638
 639 # we will also need to know the possible actions, for validation
 640 our %actions = (
 641         "blame" => \&git_blame,
 642         "blame_incremental" => \&git_blame_incremental,
 643         "blame_data" => \&git_blame_data,
 644         "blobdiff" => \&git_blobdiff,
 645         "blobdiff_plain" => \&git_blobdiff_plain,
 646         "blob" => \&git_blob,
 647         "blob_plain" => \&git_blob_plain,
 648         "commitdiff" => \&git_commitdiff,
 649         "commitdiff_plain" => \&git_commitdiff_plain,
 650         "commit" => \&git_commit,
 651         "forks" => \&git_forks,
 652         "heads" => \&git_heads,
 653         "history" => \&git_history,
 654         "log" => \&git_log,
 655         "patch" => \&git_patch,
 656         "patches" => \&git_patches,
 657         "rss" => \&git_rss,
 658         "atom" => \&git_atom,
 659         "search" => \&git_search,
 660         "search_help" => \&git_search_help,
 661         "shortlog" => \&git_shortlog,
 662         "summary" => \&git_summary,
 663         "tag" => \&git_tag,
 664         "tags" => \&git_tags,
 665         "tree" => \&git_tree,
 666         "snapshot" => \&git_snapshot,
 667         "object" => \&git_object,
 668         # those below don't need $project
 669         "opml" => \&git_opml,
 670         "project_list" => \&git_project_list,
 671         "project_index" => \&git_project_index,
 672 );
 673
 674 # finally, we have the hash of allowed extra_options for the commands that
 675 # allow them
 676 our %allowed_options = (
 677         "--no-merges" => [ qw(rss atom log shortlog history) ],
 678 );
 679
 680 # fill %input_params with the CGI parameters. All values except for 'opt'
 681 # should be single values, but opt can be an array. We should probably
 682 # build an array of parameters that can be multi-valued, but since for the time
 683 # being it's only this one, we just single it out
 684 while (my ($name, $symbol) = each %cgi_param_mapping) {
 685         if ($symbol eq 'opt') {
 686                 $input_params{$name} = [ $cgi->param($symbol) ];
 687         } else {
 688                 $input_params{$name} = $cgi->param($symbol);
 689         }
 690 }
 691
 692 # now read PATH_INFO and update the parameter list for missing parameters
 693 sub evaluate_path_info {
 694         return if defined $input_params{'project'};
 695         return if !$path_info;
 696         $path_info =~ s,^/+,,;
 697         return if !$path_info;
 698
 699         # find which part of PATH_INFO is project
 700         my $project = $path_info;
 701         $project =~ s,/+$,,;
 702         while ($project && !check_head_link("$projectroot/$project")) {
 703                 $project =~ s,/*[^/]*$,,;
 704         }
 705         return unless $project;
 706         $input_params{'project'} = $project;
 707
 708         # do not change any parameters if an action is given using the query string
 709         return if $input_params{'action'};
 710         $path_info =~ s,^\Q$project\E/*,,;
 711
 712         # next, check if we have an action
 713         my $action = $path_info;
 714         $action =~ s,/.*$,,;
 715         if (exists $actions{$action}) {
 716                 $path_info =~ s,^$action/*,,;
 717                 $input_params{'action'} = $action;
 718         }
 719
 720         # list of actions that want hash_base instead of hash, but can have no
 721         # pathname (f) parameter
 722         my @wants_base = (
 723                 'tree',
 724                 'history',
 725         );
 726
 727         # we want to catch
 728         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 729         my ($parentrefname, $parentpathname, $refname, $pathname) =
 730                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 731
 732         # first, analyze the 'current' part
 733         if (defined $pathname) {
 734                 # we got "branch:filename" or "branch:dir/"
 735                 # we could use git_get_type(branch:pathname), but:
 736                 # - it needs $git_dir
 737                 # - it does a git() call
 738                 # - the convention of terminating directories with a slash
 739                 #   makes it superfluous
 740                 # - embedding the action in the PATH_INFO would make it even
 741                 #   more superfluous
 742                 $pathname =~ s,^/+,,;
 743                 if (!$pathname || substr($pathname, -1) eq "/") {
 744                         $input_params{'action'} ||= "tree";
 745                         $pathname =~ s,/$,,;
 746                 } else {
 747                         # the default action depends on whether we had parent info
 748                         # or not
 749                         if ($parentrefname) {
 750                                 $input_params{'action'} ||= "blobdiff_plain";
 751                         } else {
 752                                 $input_params{'action'} ||= "blob_plain";
 753                         }
 754                 }
 755                 $input_params{'hash_base'} ||= $refname;
 756                 $input_params{'file_name'} ||= $pathname;
 757         } elsif (defined $refname) {
 758                 # we got "branch". In this case we have to choose if we have to
 759                 # set hash or hash_base.
 760                 #
 761                 # Most of the actions without a pathname only want hash to be
 762                 # set, except for the ones specified in @wants_base that want
 763                 # hash_base instead. It should also be noted that hand-crafted
 764                 # links having 'history' as an action and no pathname or hash
 765                 # set will fail, but that happens regardless of PATH_INFO.
 766                 $input_params{'action'} ||= "shortlog";
 767                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 768                         $input_params{'hash_base'} ||= $refname;
 769                 } else {
 770                         $input_params{'hash'} ||= $refname;
 771                 }
 772         }
 773
 774         # next, handle the 'parent' part, if present
 775         if (defined $parentrefname) {
 776                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 777                 # someproject/blobdiff/oldrev..newrev:/filename
 778                 if ($parentpathname) {
 779                         $parentpathname =~ s,^/+,,;
 780                         $parentpathname =~ s,/$,,;
 781                         $input_params{'file_parent'} ||= $parentpathname;
 782                 } else {
 783                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 784                 }
 785                 # we assume that hash_parent_base is wanted if a path was specified,
 786                 # or if the action wants hash_base instead of hash
 787                 if (defined $input_params{'file_parent'} ||
 788                         grep { $_ eq $input_params{'action'} } @wants_base) {
 789                         $input_params{'hash_parent_base'} ||= $parentrefname;
 790                 } else {
 791                         $input_params{'hash_parent'} ||= $parentrefname;
 792                 }
 793         }
 794
 795         # for the snapshot action, we allow URLs in the form
 796         # $project/snapshot/$hash.ext
 797         # where .ext determines the snapshot and gets removed from the
 798         # passed $refname to provide the $hash.
 799         #
 800         # To be able to tell that $refname includes the format extension, we
 801         # require the following two conditions to be satisfied:
 802         # - the hash input parameter MUST have been set from the $refname part
 803         #   of the URL (i.e. they must be equal)
 804         # - the snapshot format MUST NOT have been defined already (e.g. from
 805         #   CGI parameter sf)
 806         # It's also useless to try any matching unless $refname has a dot,
 807         # so we check for that too
 808         if (defined $input_params{'action'} &&
 809                 $input_params{'action'} eq 'snapshot' &&
 810                 defined $refname && index($refname, '.') != -1 &&
 811                 $refname eq $input_params{'hash'} &&
 812                 !defined $input_params{'snapshot_format'}) {
 813                 # We loop over the known snapshot formats, checking for
 814                 # extensions. Allowed extensions are both the defined suffix
 815                 # (which includes the initial dot already) and the snapshot
 816                 # format key itself, with a prepended dot
 817                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 818                         my $hash = $refname;
 819                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 820                                 next;
 821                         }
 822                         my $sfx = $1;
 823                         # a valid suffix was found, so set the snapshot format
 824                         # and reset the hash parameter
 825                         $input_params{'snapshot_format'} = $fmt;
 826                         $input_params{'hash'} = $hash;
 827                         # we also set the format suffix to the one requested
 828                         # in the URL: this way a request for e.g. .tgz returns
 829                         # a .tgz instead of a .tar.gz
 830                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 831                         last;
 832                 }
 833         }
 834 }
 835 evaluate_path_info();
 836
 837 our $action = $input_params{'action'};
 838 if (defined $action) {
 839         if (!validate_action($action)) {
 840                 die_error(400, "Invalid action parameter");
 841         }
 842 }
 843
 844 # parameters which are pathnames
 845 our $project = $input_params{'project'};
 846 if (defined $project) {
 847         if (!validate_project($project)) {
 848                 undef $project;
 849                 die_error(404, "No such project");
 850         }
 851 }
 852
 853 our $file_name = $input_params{'file_name'};
 854 if (defined $file_name) {
 855         if (!validate_pathname($file_name)) {
 856                 die_error(400, "Invalid file parameter");
 857         }
 858 }
 859
 860 our $file_parent = $input_params{'file_parent'};
 861 if (defined $file_parent) {
 862         if (!validate_pathname($file_parent)) {
 863                 die_error(400, "Invalid file parent parameter");
 864         }
 865 }
 866
 867 # parameters which are refnames
 868 our $hash = $input_params{'hash'};
 869 if (defined $hash) {
 870         if (!validate_refname($hash)) {
 871                 die_error(400, "Invalid hash parameter");
 872         }
 873 }
 874
 875 our $hash_parent = $input_params{'hash_parent'};
 876 if (defined $hash_parent) {
 877         if (!validate_refname($hash_parent)) {
 878                 die_error(400, "Invalid hash parent parameter");
 879         }
 880 }
 881
 882 our $hash_base = $input_params{'hash_base'};
 883 if (defined $hash_base) {
 884         if (!validate_refname($hash_base)) {
 885                 die_error(400, "Invalid hash base parameter");
 886         }
 887 }
 888
 889 our @extra_options = @{$input_params{'extra_options'}};
 890 # @extra_options is always defined, since it can only be (currently) set from
 891 # CGI, and $cgi->param() returns the empty array in array context if the param
 892 # is not set
 893 foreach my $opt (@extra_options) {
 894         if (not exists $allowed_options{$opt}) {
 895                 die_error(400, "Invalid option parameter");
 896         }
 897         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 898                 die_error(400, "Invalid option parameter for this action");
 899         }
 900 }
 901
 902 our $hash_parent_base = $input_params{'hash_parent_base'};
 903 if (defined $hash_parent_base) {
 904         if (!validate_refname($hash_parent_base)) {
 905                 die_error(400, "Invalid hash parent base parameter");
 906         }
 907 }
 908
 909 # other parameters
 910 our $page = $input_params{'page'};
 911 if (defined $page) {
 912         if ($page =~ m/[^0-9]/) {
 913                 die_error(400, "Invalid page parameter");
 914         }
 915 }
 916
 917 our $searchtype = $input_params{'searchtype'};
 918 if (defined $searchtype) {
 919         if ($searchtype =~ m/[^a-z]/) {
 920                 die_error(400, "Invalid searchtype parameter");
 921         }
 922 }
 923
 924 our $search_use_regexp = $input_params{'search_use_regexp'};
 925
 926 our $searchtext = $input_params{'searchtext'};
 927 our $search_regexp;
 928 if (defined $searchtext) {
 929         if (length($searchtext) < 2) {
 930                 die_error(403, "At least two characters are required for search parameter");
 931         }
 932         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 933 }
 934
 935 # path to the current git repository
 936 our $git_dir;
 937 $git_dir = "$projectroot/$project" if $project;
 938
 939 # list of supported snapshot formats
 940 our @snapshot_fmts = gitweb_get_feature('snapshot');
 941 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 942
 943 # check that the avatar feature is set to a known provider name,
 944 # and for each provider check if the dependencies are satisfied.
 945 # if the provider name is invalid or the dependencies are not met,
 946 # reset $git_avatar to the empty string.
 947 our ($git_avatar) = gitweb_get_feature('avatar');
 948 if ($git_avatar eq 'gravatar') {
 949         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 950 } elsif ($git_avatar eq 'picon') {
 951         # no dependencies
 952 } else {
 953         $git_avatar = '';
 954 }
 955
 956 # custom error handler: 'die <message>' is Internal Server Error
 957 sub handle_errors_html {
 958         my $msg = shift; # it is already HTML escaped
 959
 960         # to avoid infinite loop where error occurs in die_error,
 961         # change handler to default handler, disabling handle_errors_html
 962         set_message("Error occured when inside die_error:\n$msg");
 963
 964         # you cannot jump out of die_error when called as error handler;
 965         # the subroutine set via CGI::Carp::set_message is called _after_
 966         # HTTP headers are already written, so it cannot write them itself
 967         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
 968 }
 969 set_message(\&handle_errors_html);
 970
 971 # dispatch
 972 if (!defined $action) {
 973         if (defined $hash) {
 974                 $action = git_get_type($hash);
 975         } elsif (defined $hash_base && defined $file_name) {
 976                 $action = git_get_type("$hash_base:$file_name");
 977         } elsif (defined $project) {
 978                 $action = 'summary';
 979         } else {
 980                 $action = 'project_list';
 981         }
 982 }
 983 if (!defined($actions{$action})) {
 984         die_error(400, "Unknown action");
 985 }
 986 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 987     !$project) {
 988         die_error(400, "Project needed");
 989 }
 990 $actions{$action}->();
 991 DONE_GITWEB:
 992 1;
 993
 994 ## ======================================================================
 995 ## action links
 996
 997 # possible values of extra options
 998 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
 999 # -replay => 1      - start from a current view (replay with modifications)
1000 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1001 sub href {
1002         my %params = @_;
1003         # default is to use -absolute url() i.e. $my_uri
1004         my $href = $params{-full} ? $my_url : $my_uri;
1005
1006         $params{'project'} = $project unless exists $params{'project'};
1007
1008         if ($params{-replay}) {
1009                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1010                         if (!exists $params{$name}) {
1011                                 $params{$name} = $input_params{$name};
1012                         }
1013                 }
1014         }
1015
1016         my $use_pathinfo = gitweb_check_feature('pathinfo');
1017         if (defined $params{'project'} &&
1018             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1019                 # try to put as many parameters as possible in PATH_INFO:
1020                 #   - project name
1021                 #   - action
1022                 #   - hash_parent or hash_parent_base:/file_parent
1023                 #   - hash or hash_base:/filename
1024                 #   - the snapshot_format as an appropriate suffix
1025
1026                 # When the script is the root DirectoryIndex for the domain,
1027                 # $href here would be something like http://gitweb.example.com/
1028                 # Thus, we strip any trailing / from $href, to spare us double
1029                 # slashes in the final URL
1030                 $href =~ s,/$,,;
1031
1032                 # Then add the project name, if present
1033                 $href .= "/".esc_url($params{'project'});
1034                 delete $params{'project'};
1035
1036                 # since we destructively absorb parameters, we keep this
1037                 # boolean that remembers if we're handling a snapshot
1038                 my $is_snapshot = $params{'action'} eq 'snapshot';
1039
1040                 # Summary just uses the project path URL, any other action is
1041                 # added to the URL
1042                 if (defined $params{'action'}) {
1043                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1044                         delete $params{'action'};
1045                 }
1046
1047                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1048                 # stripping nonexistent or useless pieces
1049                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1050                         || $params{'hash_parent'} || $params{'hash'});
1051                 if (defined $params{'hash_base'}) {
1052                         if (defined $params{'hash_parent_base'}) {
1053                                 $href .= esc_url($params{'hash_parent_base'});
1054                                 # skip the file_parent if it's the same as the file_name
1055                                 if (defined $params{'file_parent'}) {
1056                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1057                                                 delete $params{'file_parent'};
1058                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1059                                                 $href .= ":/".esc_url($params{'file_parent'});
1060                                                 delete $params{'file_parent'};
1061                                         }
1062                                 }
1063                                 $href .= "..";
1064                                 delete $params{'hash_parent'};
1065                                 delete $params{'hash_parent_base'};
1066                         } elsif (defined $params{'hash_parent'}) {
1067                                 $href .= esc_url($params{'hash_parent'}). "..";
1068                                 delete $params{'hash_parent'};
1069                         }
1070
1071                         $href .= esc_url($params{'hash_base'});
1072                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1073                                 $href .= ":/".esc_url($params{'file_name'});
1074                                 delete $params{'file_name'};
1075                         }
1076                         delete $params{'hash'};
1077                         delete $params{'hash_base'};
1078                 } elsif (defined $params{'hash'}) {
1079                         $href .= esc_url($params{'hash'});
1080                         delete $params{'hash'};
1081                 }
1082
1083                 # If the action was a snapshot, we can absorb the
1084                 # snapshot_format parameter too
1085                 if ($is_snapshot) {
1086                         my $fmt = $params{'snapshot_format'};
1087                         # snapshot_format should always be defined when href()
1088                         # is called, but just in case some code forgets, we
1089                         # fall back to the default
1090                         $fmt ||= $snapshot_fmts[0];
1091                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1092                         delete $params{'snapshot_format'};
1093                 }
1094         }
1095
1096         # now encode the parameters explicitly
1097         my @result = ();
1098         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1099                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1100                 if (defined $params{$name}) {
1101                         if (ref($params{$name}) eq "ARRAY") {
1102                                 foreach my $par (@{$params{$name}}) {
1103                                         push @result, $symbol . "=" . esc_param($par);
1104                                 }
1105                         } else {
1106                                 push @result, $symbol . "=" . esc_param($params{$name});
1107                         }
1108                 }
1109         }
1110         $href .= "?" . join(';', @result) if scalar @result;
1111
1112         return $href;
1113 }
1114
1115
1116 ## ======================================================================
1117 ## validation, quoting/unquoting and escaping
1118
1119 sub validate_action {
1120         my $input = shift || return undef;
1121         return undef unless exists $actions{$input};
1122         return $input;
1123 }
1124
1125 sub validate_project {
1126         my $input = shift || return undef;
1127         if (!validate_pathname($input) ||
1128                 !(-d "$projectroot/$input") ||
1129                 !check_export_ok("$projectroot/$input") ||
1130                 ($strict_export && !project_in_list($input))) {
1131                 return undef;
1132         } else {
1133                 return $input;
1134         }
1135 }
1136
1137 sub validate_pathname {
1138         my $input = shift || return undef;
1139
1140         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1141         # at the beginning, at the end, and between slashes.
1142         # also this catches doubled slashes
1143         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1144                 return undef;
1145         }
1146         # no null characters
1147         if ($input =~ m!\0!) {
1148                 return undef;
1149         }
1150         return $input;
1151 }
1152
1153 sub validate_refname {
1154         my $input = shift || return undef;
1155
1156         # textual hashes are O.K.
1157         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1158                 return $input;
1159         }
1160         # it must be correct pathname
1161         $input = validate_pathname($input)
1162                 or return undef;
1163         # restrictions on ref name according to git-check-ref-format
1164         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1165                 return undef;
1166         }
1167         return $input;
1168 }
1169
1170 # decode sequences of octets in utf8 into Perl's internal form,
1171 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1172 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1173 sub to_utf8 {
1174         my $str = shift;
1175         return undef unless defined $str;
1176         if (utf8::valid($str)) {
1177                 utf8::decode($str);
1178                 return $str;
1179         } else {
1180                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1181         }
1182 }
1183
1184 # quote unsafe chars, but keep the slash, even when it's not
1185 # correct, but quoted slashes look too horrible in bookmarks
1186 sub esc_param {
1187         my $str = shift;
1188         return undef unless defined $str;
1189         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1190         $str =~ s/ /\+/g;
1191         return $str;
1192 }
1193
1194 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1195 sub esc_url {
1196         my $str = shift;
1197         return undef unless defined $str;
1198         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1199         $str =~ s/\+/%2B/g;
1200         $str =~ s/ /\+/g;
1201         return $str;
1202 }
1203
1204 # replace invalid utf8 character with SUBSTITUTION sequence
1205 sub esc_html {
1206         my $str = shift;
1207         my %opts = @_;
1208
1209         return undef unless defined $str;
1210
1211         $str = to_utf8($str);
1212         $str = $cgi->escapeHTML($str);
1213         if ($opts{'-nbsp'}) {
1214                 $str =~ s/ /&nbsp;/g;
1215         }
1216         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1217         return $str;
1218 }
1219
1220 # quote control characters and escape filename to HTML
1221 sub esc_path {
1222         my $str = shift;
1223         my %opts = @_;
1224
1225         return undef unless defined $str;
1226
1227         $str = to_utf8($str);
1228         $str = $cgi->escapeHTML($str);
1229         if ($opts{'-nbsp'}) {
1230                 $str =~ s/ /&nbsp;/g;
1231         }
1232         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1233         return $str;
1234 }
1235
1236 # Make control characters "printable", using character escape codes (CEC)
1237 sub quot_cec {
1238         my $cntrl = shift;
1239         my %opts = @_;
1240         my %es = ( # character escape codes, aka escape sequences
1241                 "\t" => '\t',   # tab            (HT)
1242                 "\n" => '\n',   # line feed      (LF)
1243                 "\r" => '\r',   # carrige return (CR)
1244                 "\f" => '\f',   # form feed      (FF)
1245                 "\b" => '\b',   # backspace      (BS)
1246                 "\a" => '\a',   # alarm (bell)   (BEL)
1247                 "\e" => '\e',   # escape         (ESC)
1248                 "\013" => '\v', # vertical tab   (VT)
1249                 "\000" => '\0', # nul character  (NUL)
1250         );
1251         my $chr = ( (exists $es{$cntrl})
1252                     ? $es{$cntrl}
1253                     : sprintf('\%2x', ord($cntrl)) );
1254         if ($opts{-nohtml}) {
1255                 return $chr;
1256         } else {
1257                 return "<span class=\"cntrl\">$chr</span>";
1258         }
1259 }
1260
1261 # Alternatively use unicode control pictures codepoints,
1262 # Unicode "printable representation" (PR)
1263 sub quot_upr {
1264         my $cntrl = shift;
1265         my %opts = @_;
1266
1267         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1268         if ($opts{-nohtml}) {
1269                 return $chr;
1270         } else {
1271                 return "<span class=\"cntrl\">$chr</span>";
1272         }
1273 }
1274
1275 # git may return quoted and escaped filenames
1276 sub unquote {
1277         my $str = shift;
1278
1279         sub unq {
1280                 my $seq = shift;
1281                 my %es = ( # character escape codes, aka escape sequences
1282                         't' => "\t",   # tab            (HT, TAB)
1283                         'n' => "\n",   # newline        (NL)
1284                         'r' => "\r",   # return         (CR)
1285                         'f' => "\f",   # form feed      (FF)
1286                         'b' => "\b",   # backspace      (BS)
1287                         'a' => "\a",   # alarm (bell)   (BEL)
1288                         'e' => "\e",   # escape         (ESC)
1289                         'v' => "\013", # vertical tab   (VT)
1290                 );
1291
1292                 if ($seq =~ m/^[0-7]{1,3}$/) {
1293                         # octal char sequence
1294                         return chr(oct($seq));
1295                 } elsif (exists $es{$seq}) {
1296                         # C escape sequence, aka character escape code
1297                         return $es{$seq};
1298                 }
1299                 # quoted ordinary character
1300                 return $seq;
1301         }
1302
1303         if ($str =~ m/^"(.*)"$/) {
1304                 # needs unquoting
1305                 $str = $1;
1306                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1307         }
1308         return $str;
1309 }
1310
1311 # escape tabs (convert tabs to spaces)
1312 sub untabify {
1313         my $line = shift;
1314
1315         while ((my $pos = index($line, "\t")) != -1) {
1316                 if (my $count = (8 - ($pos % 8))) {
1317                         my $spaces = ' ' x $count;
1318                         $line =~ s/\t/$spaces/;
1319                 }
1320         }
1321
1322         return $line;
1323 }
1324
1325 sub project_in_list {
1326         my $project = shift;
1327         my @list = git_get_projects_list();
1328         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1329 }
1330
1331 ## ----------------------------------------------------------------------
1332 ## HTML aware string manipulation
1333
1334 # Try to chop given string on a word boundary between position
1335 # $len and $len+$add_len. If there is no word boundary there,
1336 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1337 # (marking chopped part) would be longer than given string.
1338 sub chop_str {
1339         my $str = shift;
1340         my $len = shift;
1341         my $add_len = shift || 10;
1342         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1343
1344         # Make sure perl knows it is utf8 encoded so we don't
1345         # cut in the middle of a utf8 multibyte char.
1346         $str = to_utf8($str);
1347
1348         # allow only $len chars, but don't cut a word if it would fit in $add_len
1349         # if it doesn't fit, cut it if it's still longer than the dots we would add
1350         # remove chopped character entities entirely
1351
1352         # when chopping in the middle, distribute $len into left and right part
1353         # return early if chopping wouldn't make string shorter
1354         if ($where eq 'center') {
1355                 return $str if ($len + 5 >= length($str)); # filler is length 5
1356                 $len = int($len/2);
1357         } else {
1358                 return $str if ($len + 4 >= length($str)); # filler is length 4
1359         }
1360
1361         # regexps: ending and beginning with word part up to $add_len
1362         my $endre = qr/.{$len}\w{0,$add_len}/;
1363         my $begre = qr/\w{0,$add_len}.{$len}/;
1364
1365         if ($where eq 'left') {
1366                 $str =~ m/^(.*?)($begre)$/;
1367                 my ($lead, $body) = ($1, $2);
1368                 if (length($lead) > 4) {
1369                         $lead = " ...";
1370                 }
1371                 return "$lead$body";
1372
1373         } elsif ($where eq 'center') {
1374                 $str =~ m/^($endre)(.*)$/;
1375                 my ($left, $str)  = ($1, $2);
1376                 $str =~ m/^(.*?)($begre)$/;
1377                 my ($mid, $right) = ($1, $2);
1378                 if (length($mid) > 5) {
1379                         $mid = " ... ";
1380                 }
1381                 return "$left$mid$right";
1382
1383         } else {
1384                 $str =~ m/^($endre)(.*)$/;
1385                 my $body = $1;
1386                 my $tail = $2;
1387                 if (length($tail) > 4) {
1388                         $tail = "... ";
1389                 }
1390                 return "$body$tail";
1391         }
1392 }
1393
1394 # takes the same arguments as chop_str, but also wraps a <span> around the
1395 # result with a title attribute if it does get chopped. Additionally, the
1396 # string is HTML-escaped.
1397 sub chop_and_escape_str {
1398         my ($str) = @_;
1399
1400         my $chopped = chop_str(@_);
1401         if ($chopped eq $str) {
1402                 return esc_html($chopped);
1403         } else {
1404                 $str =~ s/[[:cntrl:]]/?/g;
1405                 return $cgi->span({-title=>$str}, esc_html($chopped));
1406         }
1407 }
1408
1409 ## ----------------------------------------------------------------------
1410 ## functions returning short strings
1411
1412 # CSS class for given age value (in seconds)
1413 sub age_class {
1414         my $age = shift;
1415
1416         if (!defined $age) {
1417                 return "noage";
1418         } elsif ($age < 60*60*2) {
1419                 return "age0";
1420         } elsif ($age < 60*60*24*2) {
1421                 return "age1";
1422         } else {
1423                 return "age2";
1424         }
1425 }
1426
1427 # convert age in seconds to "nn units ago" string
1428 sub age_string {
1429         my $age = shift;
1430         my $age_str;
1431
1432         if ($age > 60*60*24*365*2) {
1433                 $age_str = (int $age/60/60/24/365);
1434                 $age_str .= " years ago";
1435         } elsif ($age > 60*60*24*(365/12)*2) {
1436                 $age_str = int $age/60/60/24/(365/12);
1437                 $age_str .= " months ago";
1438         } elsif ($age > 60*60*24*7*2) {
1439                 $age_str = int $age/60/60/24/7;
1440                 $age_str .= " weeks ago";
1441         } elsif ($age > 60*60*24*2) {
1442                 $age_str = int $age/60/60/24;
1443                 $age_str .= " days ago";
1444         } elsif ($age > 60*60*2) {
1445                 $age_str = int $age/60/60;
1446                 $age_str .= " hours ago";
1447         } elsif ($age > 60*2) {
1448                 $age_str = int $age/60;
1449                 $age_str .= " min ago";
1450         } elsif ($age > 2) {
1451                 $age_str = int $age;
1452                 $age_str .= " sec ago";
1453         } else {
1454                 $age_str .= " right now";
1455         }
1456         return $age_str;
1457 }
1458
1459 use constant {
1460         S_IFINVALID => 0030000,
1461         S_IFGITLINK => 0160000,
1462 };
1463
1464 # submodule/subproject, a commit object reference
1465 sub S_ISGITLINK {
1466         my $mode = shift;
1467
1468         return (($mode & S_IFMT) == S_IFGITLINK)
1469 }
1470
1471 # convert file mode in octal to symbolic file mode string
1472 sub mode_str {
1473         my $mode = oct shift;
1474
1475         if (S_ISGITLINK($mode)) {
1476                 return 'm---------';
1477         } elsif (S_ISDIR($mode & S_IFMT)) {
1478                 return 'drwxr-xr-x';
1479         } elsif (S_ISLNK($mode)) {
1480                 return 'lrwxrwxrwx';
1481         } elsif (S_ISREG($mode)) {
1482                 # git cares only about the executable bit
1483                 if ($mode & S_IXUSR) {
1484                         return '-rwxr-xr-x';
1485                 } else {
1486                         return '-rw-r--r--';
1487                 };
1488         } else {
1489                 return '----------';
1490         }
1491 }
1492
1493 # convert file mode in octal to file type string
1494 sub file_type {
1495         my $mode = shift;
1496
1497         if ($mode !~ m/^[0-7]+$/) {
1498                 return $mode;
1499         } else {
1500                 $mode = oct $mode;
1501         }
1502
1503         if (S_ISGITLINK($mode)) {
1504                 return "submodule";
1505         } elsif (S_ISDIR($mode & S_IFMT)) {
1506                 return "directory";
1507         } elsif (S_ISLNK($mode)) {
1508                 return "symlink";
1509         } elsif (S_ISREG($mode)) {
1510                 return "file";
1511         } else {
1512                 return "unknown";
1513         }
1514 }
1515
1516 # convert file mode in octal to file type description string
1517 sub file_type_long {
1518         my $mode = shift;
1519
1520         if ($mode !~ m/^[0-7]+$/) {
1521                 return $mode;
1522         } else {
1523                 $mode = oct $mode;
1524         }
1525
1526         if (S_ISGITLINK($mode)) {
1527                 return "submodule";
1528         } elsif (S_ISDIR($mode & S_IFMT)) {
1529                 return "directory";
1530         } elsif (S_ISLNK($mode)) {
1531                 return "symlink";
1532         } elsif (S_ISREG($mode)) {
1533                 if ($mode & S_IXUSR) {
1534                         return "executable";
1535                 } else {
1536                         return "file";
1537                 };
1538         } else {
1539                 return "unknown";
1540         }
1541 }
1542
1543
1544 ## ----------------------------------------------------------------------
1545 ## functions returning short HTML fragments, or transforming HTML fragments
1546 ## which don't belong to other sections
1547
1548 # format line of commit message.
1549 sub format_log_line_html {
1550         my $line = shift;
1551
1552         $line = esc_html($line, -nbsp=>1);
1553         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1554                 $cgi->a({-href => href(action=>"object", hash=>$1),
1555                                         -class => "text"}, $1);
1556         }eg;
1557
1558         return $line;
1559 }
1560
1561 # format marker of refs pointing to given object
1562
1563 # the destination action is chosen based on object type and current context:
1564 # - for annotated tags, we choose the tag view unless it's the current view
1565 #   already, in which case we go to shortlog view
1566 # - for other refs, we keep the current view if we're in history, shortlog or
1567 #   log view, and select shortlog otherwise
1568 sub format_ref_marker {
1569         my ($refs, $id) = @_;
1570         my $markers = '';
1571
1572         if (defined $refs->{$id}) {
1573                 foreach my $ref (@{$refs->{$id}}) {
1574                         # this code exploits the fact that non-lightweight tags are the
1575                         # only indirect objects, and that they are the only objects for which
1576                         # we want to use tag instead of shortlog as action
1577                         my ($type, $name) = qw();
1578                         my $indirect = ($ref =~ s/\^\{\}$//);
1579                         # e.g. tags/v2.6.11 or heads/next
1580                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1581                                 $type = $1;
1582                                 $name = $2;
1583                         } else {
1584                                 $type = "ref";
1585                                 $name = $ref;
1586                         }
1587
1588                         my $class = $type;
1589                         $class .= " indirect" if $indirect;
1590
1591                         my $dest_action = "shortlog";
1592
1593                         if ($indirect) {
1594                                 $dest_action = "tag" unless $action eq "tag";
1595                         } elsif ($action =~ /^(history|(short)?log)$/) {
1596                                 $dest_action = $action;
1597                         }
1598
1599                         my $dest = "";
1600                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1601                         $dest .= $ref;
1602
1603                         my $link = $cgi->a({
1604                                 -href => href(
1605                                         action=>$dest_action,
1606                                         hash=>$dest
1607                                 )}, $name);
1608
1609                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1610                                 $link . "</span>";
1611                 }
1612         }
1613
1614         if ($markers) {
1615                 return ' <span class="refs">'. $markers . '</span>';
1616         } else {
1617                 return "";
1618         }
1619 }
1620
1621 # format, perhaps shortened and with markers, title line
1622 sub format_subject_html {
1623         my ($long, $short, $href, $extra) = @_;
1624         $extra = '' unless defined($extra);
1625
1626         if (length($short) < length($long)) {
1627                 $long =~ s/[[:cntrl:]]/?/g;
1628                 return $cgi->a({-href => $href, -class => "list subject",
1629                                 -title => to_utf8($long)},
1630                        esc_html($short)) . $extra;
1631         } else {
1632                 return $cgi->a({-href => $href, -class => "list subject"},
1633                        esc_html($long)) . $extra;
1634         }
1635 }
1636
1637 # Rather than recomputing the url for an email multiple times, we cache it
1638 # after the first hit. This gives a visible benefit in views where the avatar
1639 # for the same email is used repeatedly (e.g. shortlog).
1640 # The cache is shared by all avatar engines (currently gravatar only), which
1641 # are free to use it as preferred. Since only one avatar engine is used for any
1642 # given page, there's no risk for cache conflicts.
1643 our %avatar_cache = ();
1644
1645 # Compute the picon url for a given email, by using the picon search service over at
1646 # http://www.cs.indiana.edu/picons/search.html
1647 sub picon_url {
1648         my $email = lc shift;
1649         if (!$avatar_cache{$email}) {
1650                 my ($user, $domain) = split('@', $email);
1651                 $avatar_cache{$email} =
1652                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1653                         "$domain/$user/" .
1654                         "users+domains+unknown/up/single";
1655         }
1656         return $avatar_cache{$email};
1657 }
1658
1659 # Compute the gravatar url for a given email, if it's not in the cache already.
1660 # Gravatar stores only the part of the URL before the size, since that's the
1661 # one computationally more expensive. This also allows reuse of the cache for
1662 # different sizes (for this particular engine).
1663 sub gravatar_url {
1664         my $email = lc shift;
1665         my $size = shift;
1666         $avatar_cache{$email} ||=
1667                 "http://www.gravatar.com/avatar/" .
1668                         Digest::MD5::md5_hex($email) . "?s=";
1669         return $avatar_cache{$email} . $size;
1670 }
1671
1672 # Insert an avatar for the given $email at the given $size if the feature
1673 # is enabled.
1674 sub git_get_avatar {
1675         my ($email, %opts) = @_;
1676         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1677         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1678         $opts{-size} ||= 'default';
1679         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1680         my $url = "";
1681         if ($git_avatar eq 'gravatar') {
1682                 $url = gravatar_url($email, $size);
1683         } elsif ($git_avatar eq 'picon') {
1684                 $url = picon_url($email);
1685         }
1686         # Other providers can be added by extending the if chain, defining $url
1687         # as needed. If no variant puts something in $url, we assume avatars
1688         # are completely disabled/unavailable.
1689         if ($url) {
1690                 return $pre_white .
1691                        "<img width=\"$size\" " .
1692                             "class=\"avatar\" " .
1693                             "src=\"$url\" " .
1694                             "alt=\"\" " .
1695                        "/>" . $post_white;
1696         } else {
1697                 return "";
1698         }
1699 }
1700
1701 sub format_search_author {
1702         my ($author, $searchtype, $displaytext) = @_;
1703         my $have_search = gitweb_check_feature('search');
1704
1705         if ($have_search) {
1706                 my $performed = "";
1707                 if ($searchtype eq 'author') {
1708                         $performed = "authored";
1709                 } elsif ($searchtype eq 'committer') {
1710                         $performed = "committed";
1711                 }
1712
1713                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1714                                 searchtext=>$author,
1715                                 searchtype=>$searchtype), class=>"list",
1716                                 title=>"Search for commits $performed by $author"},
1717                                 $displaytext);
1718
1719         } else {
1720                 return $displaytext;
1721         }
1722 }
1723
1724 # format the author name of the given commit with the given tag
1725 # the author name is chopped and escaped according to the other
1726 # optional parameters (see chop_str).
1727 sub format_author_html {
1728         my $tag = shift;
1729         my $co = shift;
1730         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1731         return "<$tag class=\"author\">" .
1732                format_search_author($co->{'author_name'}, "author",
1733                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1734                        $author) .
1735                "</$tag>";
1736 }
1737
1738 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1739 sub format_git_diff_header_line {
1740         my $line = shift;
1741         my $diffinfo = shift;
1742         my ($from, $to) = @_;
1743
1744         if ($diffinfo->{'nparents'}) {
1745                 # combined diff
1746                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1747                 if ($to->{'href'}) {
1748                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1749                                          esc_path($to->{'file'}));
1750                 } else { # file was deleted (no href)
1751                         $line .= esc_path($to->{'file'});
1752                 }
1753         } else {
1754                 # "ordinary" diff
1755                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1756                 if ($from->{'href'}) {
1757                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1758                                          'a/' . esc_path($from->{'file'}));
1759                 } else { # file was added (no href)
1760                         $line .= 'a/' . esc_path($from->{'file'});
1761                 }
1762                 $line .= ' ';
1763                 if ($to->{'href'}) {
1764                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1765                                          'b/' . esc_path($to->{'file'}));
1766                 } else { # file was deleted
1767                         $line .= 'b/' . esc_path($to->{'file'});
1768                 }
1769         }
1770
1771         return "<div class=\"diff header\">$line</div>\n";
1772 }
1773
1774 # format extended diff header line, before patch itself
1775 sub format_extended_diff_header_line {
1776         my $line = shift;
1777         my $diffinfo = shift;
1778         my ($from, $to) = @_;
1779
1780         # match <path>
1781         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1782                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1783                                        esc_path($from->{'file'}));
1784         }
1785         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1786                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1787                                  esc_path($to->{'file'}));
1788         }
1789         # match single <mode>
1790         if ($line =~ m/\s(\d{6})$/) {
1791                 $line .= '<span class="info"> (' .
1792                          file_type_long($1) .
1793                          ')</span>';
1794         }
1795         # match <hash>
1796         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1797                 # can match only for combined diff
1798                 $line = 'index ';
1799                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1800                         if ($from->{'href'}[$i]) {
1801                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1802                                                   -class=>"hash"},
1803                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1804                         } else {
1805                                 $line .= '0' x 7;
1806                         }
1807                         # separator
1808                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1809                 }
1810                 $line .= '..';
1811                 if ($to->{'href'}) {
1812                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1813                                          substr($diffinfo->{'to_id'},0,7));
1814                 } else {
1815                         $line .= '0' x 7;
1816                 }
1817
1818         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1819                 # can match only for ordinary diff
1820                 my ($from_link, $to_link);
1821                 if ($from->{'href'}) {
1822                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1823                                              substr($diffinfo->{'from_id'},0,7));
1824                 } else {
1825                         $from_link = '0' x 7;
1826                 }
1827                 if ($to->{'href'}) {
1828                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1829                                            substr($diffinfo->{'to_id'},0,7));
1830                 } else {
1831                         $to_link = '0' x 7;
1832                 }
1833                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1834                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1835         }
1836
1837         return $line . "<br/>\n";
1838 }
1839
1840 # format from-file/to-file diff header
1841 sub format_diff_from_to_header {
1842         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1843         my $line;
1844         my $result = '';
1845
1846         $line = $from_line;
1847         #assert($line =~ m/^---/) if DEBUG;
1848         # no extra formatting for "^--- /dev/null"
1849         if (! $diffinfo->{'nparents'}) {
1850                 # ordinary (single parent) diff
1851                 if ($line =~ m!^--- "?a/!) {
1852                         if ($from->{'href'}) {
1853                                 $line = '--- a/' .
1854                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1855                                                 esc_path($from->{'file'}));
1856                         } else {
1857                                 $line = '--- a/' .
1858                                         esc_path($from->{'file'});
1859                         }
1860                 }
1861                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1862
1863         } else {
1864                 # combined diff (merge commit)
1865                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1866                         if ($from->{'href'}[$i]) {
1867                                 $line = '--- ' .
1868                                         $cgi->a({-href=>href(action=>"blobdiff",
1869                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1870                                                              hash_parent_base=>$parents[$i],
1871                                                              file_parent=>$from->{'file'}[$i],
1872                                                              hash=>$diffinfo->{'to_id'},
1873                                                              hash_base=>$hash,
1874                                                              file_name=>$to->{'file'}),
1875                                                  -class=>"path",
1876                                                  -title=>"diff" . ($i+1)},
1877                                                 $i+1) .
1878                                         '/' .
1879                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1880                                                 esc_path($from->{'file'}[$i]));
1881                         } else {
1882                                 $line = '--- /dev/null';
1883                         }
1884                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1885                 }
1886         }
1887
1888         $line = $to_line;
1889         #assert($line =~ m/^\+\+\+/) if DEBUG;
1890         # no extra formatting for "^+++ /dev/null"
1891         if ($line =~ m!^\+\+\+ "?b/!) {
1892                 if ($to->{'href'}) {
1893                         $line = '+++ b/' .
1894                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1895                                         esc_path($to->{'file'}));
1896                 } else {
1897                         $line = '+++ b/' .
1898                                 esc_path($to->{'file'});
1899                 }
1900         }
1901         $result .= qq!<div class="diff to_file">$line</div>\n!;
1902
1903         return $result;
1904 }
1905
1906 # create note for patch simplified by combined diff
1907 sub format_diff_cc_simplified {
1908         my ($diffinfo, @parents) = @_;
1909         my $result = '';
1910
1911         $result .= "<div class=\"diff header\">" .
1912                    "diff --cc ";
1913         if (!is_deleted($diffinfo)) {
1914                 $result .= $cgi->a({-href => href(action=>"blob",
1915                                                   hash_base=>$hash,
1916                                                   hash=>$diffinfo->{'to_id'},
1917                                                   file_name=>$diffinfo->{'to_file'}),
1918                                     -class => "path"},
1919                                    esc_path($diffinfo->{'to_file'}));
1920         } else {
1921                 $result .= esc_path($diffinfo->{'to_file'});
1922         }
1923         $result .= "</div>\n" . # class="diff header"
1924                    "<div class=\"diff nodifferences\">" .
1925                    "Simple merge" .
1926                    "</div>\n"; # class="diff nodifferences"
1927
1928         return $result;
1929 }
1930
1931 # format patch (diff) line (not to be used for diff headers)
1932 sub format_diff_line {
1933         my $line = shift;
1934         my ($from, $to) = @_;
1935         my $diff_class = "";
1936
1937         chomp $line;
1938
1939         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1940                 # combined diff
1941                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1942                 if ($line =~ m/^\@{3}/) {
1943                         $diff_class = " chunk_header";
1944                 } elsif ($line =~ m/^\\/) {
1945                         $diff_class = " incomplete";
1946                 } elsif ($prefix =~ tr/+/+/) {
1947                         $diff_class = " add";
1948                 } elsif ($prefix =~ tr/-/-/) {
1949                         $diff_class = " rem";
1950                 }
1951         } else {
1952                 # assume ordinary diff
1953                 my $char = substr($line, 0, 1);
1954                 if ($char eq '+') {
1955                         $diff_class = " add";
1956                 } elsif ($char eq '-') {
1957                         $diff_class = " rem";
1958                 } elsif ($char eq '@') {
1959                         $diff_class = " chunk_header";
1960                 } elsif ($char eq "\\") {
1961                         $diff_class = " incomplete";
1962                 }
1963         }
1964         $line = untabify($line);
1965         if ($from && $to && $line =~ m/^\@{2} /) {
1966                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1967                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1968
1969                 $from_lines = 0 unless defined $from_lines;
1970                 $to_lines   = 0 unless defined $to_lines;
1971
1972                 if ($from->{'href'}) {
1973                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1974                                              -class=>"list"}, $from_text);
1975                 }
1976                 if ($to->{'href'}) {
1977                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1978                                              -class=>"list"}, $to_text);
1979                 }
1980                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1981                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1982                 return "<div class=\"diff$diff_class\">$line</div>\n";
1983         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1984                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1985                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1986
1987                 @from_text = split(' ', $ranges);
1988                 for (my $i = 0; $i < @from_text; ++$i) {
1989                         ($from_start[$i], $from_nlines[$i]) =
1990                                 (split(',', substr($from_text[$i], 1)), 0);
1991                 }
1992
1993                 $to_text   = pop @from_text;
1994                 $to_start  = pop @from_start;
1995                 $to_nlines = pop @from_nlines;
1996
1997                 $line = "<span class=\"chunk_info\">$prefix ";
1998                 for (my $i = 0; $i < @from_text; ++$i) {
1999                         if ($from->{'href'}[$i]) {
2000                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2001                                                   -class=>"list"}, $from_text[$i]);
2002                         } else {
2003                                 $line .= $from_text[$i];
2004                         }
2005                         $line .= " ";
2006                 }
2007                 if ($to->{'href'}) {
2008                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2009                                           -class=>"list"}, $to_text);
2010                 } else {
2011                         $line .= $to_text;
2012                 }
2013                 $line .= " $prefix</span>" .
2014                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2015                 return "<div class=\"diff$diff_class\">$line</div>\n";
2016         }
2017         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2018 }
2019
2020 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2021 # linked.  Pass the hash of the tree/commit to snapshot.
2022 sub format_snapshot_links {
2023         my ($hash) = @_;
2024         my $num_fmts = @snapshot_fmts;
2025         if ($num_fmts > 1) {
2026                 # A parenthesized list of links bearing format names.
2027                 # e.g. "snapshot (_tar.gz_ _zip_)"
2028                 return "snapshot (" . join(' ', map
2029                         $cgi->a({
2030                                 -href => href(
2031                                         action=>"snapshot",
2032                                         hash=>$hash,
2033                                         snapshot_format=>$_
2034                                 )
2035                         }, $known_snapshot_formats{$_}{'display'})
2036                 , @snapshot_fmts) . ")";
2037         } elsif ($num_fmts == 1) {
2038                 # A single "snapshot" link whose tooltip bears the format name.
2039                 # i.e. "_snapshot_"
2040                 my ($fmt) = @snapshot_fmts;
2041                 return
2042                         $cgi->a({
2043                                 -href => href(
2044                                         action=>"snapshot",
2045                                         hash=>$hash,
2046                                         snapshot_format=>$fmt
2047                                 ),
2048                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2049                         }, "snapshot");
2050         } else { # $num_fmts == 0
2051                 return undef;
2052         }
2053 }
2054
2055 ## ......................................................................
2056 ## functions returning values to be passed, perhaps after some
2057 ## transformation, to other functions; e.g. returning arguments to href()
2058
2059 # returns hash to be passed to href to generate gitweb URL
2060 # in -title key it returns description of link
2061 sub get_feed_info {
2062         my $format = shift || 'Atom';
2063         my %res = (action => lc($format));
2064
2065         # feed links are possible only for project views
2066         return unless (defined $project);
2067         # some views should link to OPML, or to generic project feed,
2068         # or don't have specific feed yet (so they should use generic)
2069         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2070
2071         my $branch;
2072         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2073         # from tag links; this also makes possible to detect branch links
2074         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2075             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2076                 $branch = $1;
2077         }
2078         # find log type for feed description (title)
2079         my $type = 'log';
2080         if (defined $file_name) {
2081                 $type  = "history of $file_name";
2082                 $type .= "/" if ($action eq 'tree');
2083                 $type .= " on '$branch'" if (defined $branch);
2084         } else {
2085                 $type = "log of $branch" if (defined $branch);
2086         }
2087
2088         $res{-title} = $type;
2089         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2090         $res{'file_name'} = $file_name;
2091
2092         return %res;
2093 }
2094
2095 ## ----------------------------------------------------------------------
2096 ## git utility subroutines, invoking git commands
2097
2098 # returns path to the core git executable and the --git-dir parameter as list
2099 sub git_cmd {
2100         $number_of_git_cmds++;
2101         return $GIT, '--git-dir='.$git_dir;
2102 }
2103
2104 # quote the given arguments for passing them to the shell
2105 # quote_command("command", "arg 1", "arg with ' and ! characters")
2106 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2107 # Try to avoid using this function wherever possible.
2108 sub quote_command {
2109         return join(' ',
2110                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2111 }
2112
2113 # get HEAD ref of given project as hash
2114 sub git_get_head_hash {
2115         return git_get_full_hash(shift, 'HEAD');
2116 }
2117
2118 sub git_get_full_hash {
2119         return git_get_hash(@_);
2120 }
2121
2122 sub git_get_short_hash {
2123         return git_get_hash(@_, '--short=7');
2124 }
2125
2126 sub git_get_hash {
2127         my ($project, $hash, @options) = @_;
2128         my $o_git_dir = $git_dir;
2129         my $retval = undef;
2130         $git_dir = "$projectroot/$project";
2131         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2132             '--verify', '-q', @options, $hash) {
2133                 $retval = <$fd>;
2134                 chomp $retval if defined $retval;
2135                 close $fd;
2136         }
2137         if (defined $o_git_dir) {
2138                 $git_dir = $o_git_dir;
2139         }
2140         return $retval;
2141 }
2142
2143 # get type of given object
2144 sub git_get_type {
2145         my $hash = shift;
2146
2147         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2148         my $type = <$fd>;
2149         close $fd or return;
2150         chomp $type;
2151         return $type;
2152 }
2153
2154 # repository configuration
2155 our $config_file = '';
2156 our %config;
2157
2158 # store multiple values for single key as anonymous array reference
2159 # single values stored directly in the hash, not as [ <value> ]
2160 sub hash_set_multi {
2161         my ($hash, $key, $value) = @_;
2162
2163         if (!exists $hash->{$key}) {
2164                 $hash->{$key} = $value;
2165         } elsif (!ref $hash->{$key}) {
2166                 $hash->{$key} = [ $hash->{$key}, $value ];
2167         } else {
2168                 push @{$hash->{$key}}, $value;
2169         }
2170 }
2171
2172 # return hash of git project configuration
2173 # optionally limited to some section, e.g. 'gitweb'
2174 sub git_parse_project_config {
2175         my $section_regexp = shift;
2176         my %config;
2177
2178         local $/ = "\0";
2179
2180         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2181                 or return;
2182
2183         while (my $keyval = <$fh>) {
2184                 chomp $keyval;
2185                 my ($key, $value) = split(/\n/, $keyval, 2);
2186
2187                 hash_set_multi(\%config, $key, $value)
2188                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2189         }
2190         close $fh;
2191
2192         return %config;
2193 }
2194
2195 # convert config value to boolean: 'true' or 'false'
2196 # no value, number > 0, 'true' and 'yes' values are true
2197 # rest of values are treated as false (never as error)
2198 sub config_to_bool {
2199         my $val = shift;
2200
2201         return 1 if !defined $val;             # section.key
2202
2203         # strip leading and trailing whitespace
2204         $val =~ s/^\s+//;
2205         $val =~ s/\s+$//;
2206
2207         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2208                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2209 }
2210
2211 # convert config value to simple decimal number
2212 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2213 # to be multiplied by 1024, 1048576, or 1073741824
2214 sub config_to_int {
2215         my $val = shift;
2216
2217         # strip leading and trailing whitespace
2218         $val =~ s/^\s+//;
2219         $val =~ s/\s+$//;
2220
2221         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2222                 $unit = lc($unit);
2223                 # unknown unit is treated as 1
2224                 return $num * ($unit eq 'g' ? 1073741824 :
2225                                $unit eq 'm' ?    1048576 :
2226                                $unit eq 'k' ?       1024 : 1);
2227         }
2228         return $val;
2229 }
2230
2231 # convert config value to array reference, if needed
2232 sub config_to_multi {
2233         my $val = shift;
2234
2235         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2236 }
2237
2238 sub git_get_project_config {
2239         my ($key, $type) = @_;
2240
2241         return unless defined $git_dir;
2242
2243         # key sanity check
2244         return unless ($key);
2245         $key =~ s/^gitweb\.//;
2246         return if ($key =~ m/\W/);
2247
2248         # type sanity check
2249         if (defined $type) {
2250                 $type =~ s/^--//;
2251                 $type = undef
2252                         unless ($type eq 'bool' || $type eq 'int');
2253         }
2254
2255         # get config
2256         if (!defined $config_file ||
2257             $config_file ne "$git_dir/config") {
2258                 %config = git_parse_project_config('gitweb');
2259                 $config_file = "$git_dir/config";
2260         }
2261
2262         # check if config variable (key) exists
2263         return unless exists $config{"gitweb.$key"};
2264
2265         # ensure given type
2266         if (!defined $type) {
2267                 return $config{"gitweb.$key"};
2268         } elsif ($type eq 'bool') {
2269                 # backward compatibility: 'git config --bool' returns true/false
2270                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2271         } elsif ($type eq 'int') {
2272                 return config_to_int($config{"gitweb.$key"});
2273         }
2274         return $config{"gitweb.$key"};
2275 }
2276
2277 # get hash of given path at given ref
2278 sub git_get_hash_by_path {
2279         my $base = shift;
2280         my $path = shift || return undef;
2281         my $type = shift;
2282
2283         $path =~ s,/+$,,;
2284
2285         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2286                 or die_error(500, "Open git-ls-tree failed");
2287         my $line = <$fd>;
2288         close $fd or return undef;
2289
2290         if (!defined $line) {
2291                 # there is no tree or hash given by $path at $base
2292                 return undef;
2293         }
2294
2295         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2296         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2297         if (defined $type && $type ne $2) {
2298                 # type doesn't match
2299                 return undef;
2300         }
2301         return $3;
2302 }
2303
2304 # get path of entry with given hash at given tree-ish (ref)
2305 # used to get 'from' filename for combined diff (merge commit) for renames
2306 sub git_get_path_by_hash {
2307         my $base = shift || return;
2308         my $hash = shift || return;
2309
2310         local $/ = "\0";
2311
2312         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2313                 or return undef;
2314         while (my $line = <$fd>) {
2315                 chomp $line;
2316
2317                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2318                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2319                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2320                         close $fd;
2321                         return $1;
2322                 }
2323         }
2324         close $fd;
2325         return undef;
2326 }
2327
2328 ## ......................................................................
2329 ## git utility functions, directly accessing git repository
2330
2331 sub git_get_project_description {
2332         my $path = shift;
2333
2334         $git_dir = "$projectroot/$path";
2335         open my $fd, '<', "$git_dir/description"
2336                 or return git_get_project_config('description');
2337         my $descr = <$fd>;
2338         close $fd;
2339         if (defined $descr) {
2340                 chomp $descr;
2341         }
2342         return $descr;
2343 }
2344
2345 sub git_get_project_ctags {
2346         my $path = shift;
2347         my $ctags = {};
2348
2349         $git_dir = "$projectroot/$path";
2350         opendir my $dh, "$git_dir/ctags"
2351                 or return $ctags;
2352         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2353                 open my $ct, '<', $_ or next;
2354                 my $val = <$ct>;
2355                 chomp $val;
2356                 close $ct;
2357                 my $ctag = $_; $ctag =~ s#.*/##;
2358                 $ctags->{$ctag} = $val;
2359         }
2360         closedir $dh;
2361         $ctags;
2362 }
2363
2364 sub git_populate_project_tagcloud {
2365         my $ctags = shift;
2366
2367         # First, merge different-cased tags; tags vote on casing
2368         my %ctags_lc;
2369         foreach (keys %$ctags) {
2370                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2371                 if (not $ctags_lc{lc $_}->{topcount}
2372                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2373                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2374                         $ctags_lc{lc $_}->{topname} = $_;
2375                 }
2376         }
2377
2378         my $cloud;
2379         if (eval { require HTML::TagCloud; 1; }) {
2380                 $cloud = HTML::TagCloud->new;
2381                 foreach (sort keys %ctags_lc) {
2382                         # Pad the title with spaces so that the cloud looks
2383                         # less crammed.
2384                         my $title = $ctags_lc{$_}->{topname};
2385                         $title =~ s/ /&nbsp;/g;
2386                         $title =~ s/^/&nbsp;/g;
2387                         $title =~ s/$/&nbsp;/g;
2388                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2389                 }
2390         } else {
2391                 $cloud = \%ctags_lc;
2392         }
2393         $cloud;
2394 }
2395
2396 sub git_show_project_tagcloud {
2397         my ($cloud, $count) = @_;
2398         print STDERR ref($cloud)."..\n";
2399         if (ref $cloud eq 'HTML::TagCloud') {
2400                 return $cloud->html_and_css($count);
2401         } else {
2402                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2403                 return '<p align="center">' . join (', ', map {
2404                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2405                 } splice(@tags, 0, $count)) . '</p>';
2406         }
2407 }
2408
2409 sub git_get_project_url_list {
2410         my $path = shift;
2411
2412         $git_dir = "$projectroot/$path";
2413         open my $fd, '<', "$git_dir/cloneurl"
2414                 or return wantarray ?
2415                 @{ config_to_multi(git_get_project_config('url')) } :
2416                    config_to_multi(git_get_project_config('url'));
2417         my @git_project_url_list = map { chomp; $_ } <$fd>;
2418         close $fd;
2419
2420         return wantarray ? @git_project_url_list : \@git_project_url_list;
2421 }
2422
2423 sub git_get_projects_list {
2424         my ($filter) = @_;
2425         my @list;
2426
2427         $filter ||= '';
2428         $filter =~ s/\.git$//;
2429
2430         my $check_forks = gitweb_check_feature('forks');
2431
2432         if (-d $projects_list) {
2433                 # search in directory
2434                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2435                 # remove the trailing "/"
2436                 $dir =~ s!/+$!!;
2437                 my $pfxlen = length("$dir");
2438                 my $pfxdepth = ($dir =~ tr!/!!);
2439
2440                 File::Find::find({
2441                         follow_fast => 1, # follow symbolic links
2442                         follow_skip => 2, # ignore duplicates
2443                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2444                         wanted => sub {
2445                                 # skip project-list toplevel, if we get it.
2446                                 return if (m!^[/.]$!);
2447                                 # only directories can be git repositories
2448                                 return unless (-d $_);
2449                                 # don't traverse too deep (Find is super slow on os x)
2450                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2451                                         $File::Find::prune = 1;
2452                                         return;
2453                                 }
2454
2455                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2456                                 # we check related file in $projectroot
2457                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2458                                 if (check_export_ok("$projectroot/$path")) {
2459                                         push @list, { path => $path };
2460                                         $File::Find::prune = 1;
2461                                 }
2462                         },
2463                 }, "$dir");
2464
2465         } elsif (-f $projects_list) {
2466                 # read from file(url-encoded):
2467                 # 'git%2Fgit.git Linus+Torvalds'
2468                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2469                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2470                 my %paths;
2471                 open my $fd, '<', $projects_list or return;
2472         PROJECT:
2473                 while (my $line = <$fd>) {
2474                         chomp $line;
2475                         my ($path, $owner) = split ' ', $line;
2476                         $path = unescape($path);
2477                         $owner = unescape($owner);
2478                         if (!defined $path) {
2479                                 next;
2480                         }
2481                         if ($filter ne '') {
2482                                 # looking for forks;
2483                                 my $pfx = substr($path, 0, length($filter));
2484                                 if ($pfx ne $filter) {
2485                                         next PROJECT;
2486                                 }
2487                                 my $sfx = substr($path, length($filter));
2488                                 if ($sfx !~ /^\/.*\.git$/) {
2489                                         next PROJECT;
2490                                 }
2491                         } elsif ($check_forks) {
2492                         PATH:
2493                                 foreach my $filter (keys %paths) {
2494                                         # looking for forks;
2495                                         my $pfx = substr($path, 0, length($filter));
2496                                         if ($pfx ne $filter) {
2497                                                 next PATH;
2498                                         }
2499                                         my $sfx = substr($path, length($filter));
2500                                         if ($sfx !~ /^\/.*\.git$/) {
2501                                                 next PATH;
2502                                         }
2503                                         # is a fork, don't include it in
2504                                         # the list
2505                                         next PROJECT;
2506                                 }
2507                         }
2508                         if (check_export_ok("$projectroot/$path")) {
2509                                 my $pr = {
2510                                         path => $path,
2511                                         owner => to_utf8($owner),
2512                                 };
2513                                 push @list, $pr;
2514                                 (my $forks_path = $path) =~ s/\.git$//;
2515                                 $paths{$forks_path}++;
2516                         }
2517                 }
2518                 close $fd;
2519         }
2520         return @list;
2521 }
2522
2523 our $gitweb_project_owner = undef;
2524 sub git_get_project_list_from_file {
2525
2526         return if (defined $gitweb_project_owner);
2527
2528         $gitweb_project_owner = {};
2529         # read from file (url-encoded):
2530         # 'git%2Fgit.git Linus+Torvalds'
2531         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2532         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2533         if (-f $projects_list) {
2534                 open(my $fd, '<', $projects_list);
2535                 while (my $line = <$fd>) {
2536                         chomp $line;
2537                         my ($pr, $ow) = split ' ', $line;
2538                         $pr = unescape($pr);
2539                         $ow = unescape($ow);
2540                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2541                 }
2542                 close $fd;
2543         }
2544 }
2545
2546 sub git_get_project_owner {
2547         my $project = shift;
2548         my $owner;
2549
2550         return undef unless $project;
2551         $git_dir = "$projectroot/$project";
2552
2553         if (!defined $gitweb_project_owner) {
2554                 git_get_project_list_from_file();
2555         }
2556
2557         if (exists $gitweb_project_owner->{$project}) {
2558                 $owner = $gitweb_project_owner->{$project};
2559         }
2560         if (!defined $owner){
2561                 $owner = git_get_project_config('owner');
2562         }
2563         if (!defined $owner) {
2564                 $owner = get_file_owner("$git_dir");
2565         }
2566
2567         return $owner;
2568 }
2569
2570 sub git_get_last_activity {
2571         my ($path) = @_;
2572         my $fd;
2573
2574         $git_dir = "$projectroot/$path";
2575         open($fd, "-|", git_cmd(), 'for-each-ref',
2576              '--format=%(committer)',
2577              '--sort=-committerdate',
2578              '--count=1',
2579              'refs/heads') or return;
2580         my $most_recent = <$fd>;
2581         close $fd or return;
2582         if (defined $most_recent &&
2583             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2584                 my $timestamp = $1;
2585                 my $age = time - $timestamp;
2586                 return ($age, age_string($age));
2587         }
2588         return (undef, undef);
2589 }
2590
2591 sub git_get_references {
2592         my $type = shift || "";
2593         my %refs;
2594         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2595         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2596         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2597                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2598                 or return;
2599
2600         while (my $line = <$fd>) {
2601                 chomp $line;
2602                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2603                         if (defined $refs{$1}) {
2604                                 push @{$refs{$1}}, $2;
2605                         } else {
2606                                 $refs{$1} = [ $2 ];
2607                         }
2608                 }
2609         }
2610         close $fd or return;
2611         return \%refs;
2612 }
2613
2614 sub git_get_rev_name_tags {
2615         my $hash = shift || return undef;
2616
2617         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2618                 or return;
2619         my $name_rev = <$fd>;
2620         close $fd;
2621
2622         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2623                 return $1;
2624         } else {
2625                 # catches also '$hash undefined' output
2626                 return undef;
2627         }
2628 }
2629
2630 ## ----------------------------------------------------------------------
2631 ## parse to hash functions
2632
2633 sub parse_date {
2634         my $epoch = shift;
2635         my $tz = shift || "-0000";
2636
2637         my %date;
2638         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2639         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2640         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2641         $date{'hour'} = $hour;
2642         $date{'minute'} = $min;
2643         $date{'mday'} = $mday;
2644         $date{'day'} = $days[$wday];
2645         $date{'month'} = $months[$mon];
2646         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2647                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2648         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2649                              $mday, $months[$mon], $hour ,$min;
2650         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2651                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2652
2653         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2654         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2655         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2656         $date{'hour_local'} = $hour;
2657         $date{'minute_local'} = $min;
2658         $date{'tz_local'} = $tz;
2659         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2660                                   1900+$year, $mon+1, $mday,
2661                                   $hour, $min, $sec, $tz);
2662         return %date;
2663 }
2664
2665 sub parse_tag {
2666         my $tag_id = shift;
2667         my %tag;
2668         my @comment;
2669
2670         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2671         $tag{'id'} = $tag_id;
2672         while (my $line = <$fd>) {
2673                 chomp $line;
2674                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2675                         $tag{'object'} = $1;
2676                 } elsif ($line =~ m/^type (.+)$/) {
2677                         $tag{'type'} = $1;
2678                 } elsif ($line =~ m/^tag (.+)$/) {
2679                         $tag{'name'} = $1;
2680                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2681                         $tag{'author'} = $1;
2682                         $tag{'author_epoch'} = $2;
2683                         $tag{'author_tz'} = $3;
2684                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2685                                 $tag{'author_name'}  = $1;
2686                                 $tag{'author_email'} = $2;
2687                         } else {
2688                                 $tag{'author_name'} = $tag{'author'};
2689                         }
2690                 } elsif ($line =~ m/--BEGIN/) {
2691                         push @comment, $line;
2692                         last;
2693                 } elsif ($line eq "") {
2694                         last;
2695                 }
2696         }
2697         push @comment, <$fd>;
2698         $tag{'comment'} = \@comment;
2699         close $fd or return;
2700         if (!defined $tag{'name'}) {
2701                 return
2702         };
2703         return %tag
2704 }
2705
2706 sub parse_commit_text {
2707         my ($commit_text, $withparents) = @_;
2708         my @commit_lines = split '\n', $commit_text;
2709         my %co;
2710
2711         pop @commit_lines; # Remove '\0'
2712
2713         if (! @commit_lines) {
2714                 return;
2715         }
2716
2717         my $header = shift @commit_lines;
2718         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2719                 return;
2720         }
2721         ($co{'id'}, my @parents) = split ' ', $header;
2722         while (my $line = shift @commit_lines) {
2723                 last if $line eq "\n";
2724                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2725                         $co{'tree'} = $1;
2726                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2727                         push @parents, $1;
2728                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2729                         $co{'author'} = to_utf8($1);
2730                         $co{'author_epoch'} = $2;
2731                         $co{'author_tz'} = $3;
2732                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2733                                 $co{'author_name'}  = $1;
2734                                 $co{'author_email'} = $2;
2735                         } else {
2736                                 $co{'author_name'} = $co{'author'};
2737                         }
2738                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2739                         $co{'committer'} = to_utf8($1);
2740                         $co{'committer_epoch'} = $2;
2741                         $co{'committer_tz'} = $3;
2742                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2743                                 $co{'committer_name'}  = $1;
2744                                 $co{'committer_email'} = $2;
2745                         } else {
2746                                 $co{'committer_name'} = $co{'committer'};
2747                         }
2748                 }
2749         }
2750         if (!defined $co{'tree'}) {
2751                 return;
2752         };
2753         $co{'parents'} = \@parents;
2754         $co{'parent'} = $parents[0];
2755
2756         foreach my $title (@commit_lines) {
2757                 $title =~ s/^    //;
2758                 if ($title ne "") {
2759                         $co{'title'} = chop_str($title, 80, 5);
2760                         # remove leading stuff of merges to make the interesting part visible
2761                         if (length($title) > 50) {
2762                                 $title =~ s/^Automatic //;
2763                                 $title =~ s/^merge (of|with) /Merge ... /i;
2764                                 if (length($title) > 50) {
2765                                         $title =~ s/(http|rsync):\/\///;
2766                                 }
2767                                 if (length($title) > 50) {
2768                                         $title =~ s/(master|www|rsync)\.//;
2769                                 }
2770                                 if (length($title) > 50) {
2771                                         $title =~ s/kernel.org:?//;
2772                                 }
2773                                 if (length($title) > 50) {
2774                                         $title =~ s/\/pub\/scm//;
2775                                 }
2776                         }
2777                         $co{'title_short'} = chop_str($title, 50, 5);
2778                         last;
2779                 }
2780         }
2781         if (! defined $co{'title'} || $co{'title'} eq "") {
2782                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2783         }
2784         # remove added spaces
2785         foreach my $line (@commit_lines) {
2786                 $line =~ s/^    //;
2787         }
2788         $co{'comment'} = \@commit_lines;
2789
2790         my $age = time - $co{'committer_epoch'};
2791         $co{'age'} = $age;
2792         $co{'age_string'} = age_string($age);
2793         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2794         if ($age > 60*60*24*7*2) {
2795                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2796                 $co{'age_string_age'} = $co{'age_string'};
2797         } else {
2798                 $co{'age_string_date'} = $co{'age_string'};
2799                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2800         }
2801         return %co;
2802 }
2803
2804 sub parse_commit {
2805         my ($commit_id) = @_;
2806         my %co;
2807
2808         local $/ = "\0";
2809
2810         open my $fd, "-|", git_cmd(), "rev-list",
2811                 "--parents",
2812                 "--header",
2813                 "--max-count=1",
2814                 $commit_id,
2815                 "--",
2816                 or die_error(500, "Open git-rev-list failed");
2817         %co = parse_commit_text(<$fd>, 1);
2818         close $fd;
2819
2820         return %co;
2821 }
2822
2823 sub parse_commits {
2824         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2825         my @cos;
2826
2827         $maxcount ||= 1;
2828         $skip ||= 0;
2829
2830         local $/ = "\0";
2831
2832         open my $fd, "-|", git_cmd(), "rev-list",
2833                 "--header",
2834                 @args,
2835                 ("--max-count=" . $maxcount),
2836                 ("--skip=" . $skip),
2837                 @extra_options,
2838                 $commit_id,
2839                 "--",
2840                 ($filename ? ($filename) : ())
2841                 or die_error(500, "Open git-rev-list failed");
2842         while (my $line = <$fd>) {
2843                 my %co = parse_commit_text($line);
2844                 push @cos, \%co;
2845         }
2846         close $fd;
2847
2848         return wantarray ? @cos : \@cos;
2849 }
2850
2851 # parse line of git-diff-tree "raw" output
2852 sub parse_difftree_raw_line {
2853         my $line = shift;
2854         my %res;
2855
2856         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2857         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2858         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2859                 $res{'from_mode'} = $1;
2860                 $res{'to_mode'} = $2;
2861                 $res{'from_id'} = $3;
2862                 $res{'to_id'} = $4;
2863                 $res{'status'} = $5;
2864                 $res{'similarity'} = $6;
2865                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2866                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2867                 } else {
2868                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2869                 }
2870         }
2871         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2872         # combined diff (for merge commit)
2873         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2874                 $res{'nparents'}  = length($1);
2875                 $res{'from_mode'} = [ split(' ', $2) ];
2876                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2877                 $res{'from_id'} = [ split(' ', $3) ];
2878                 $res{'to_id'} = pop @{$res{'from_id'}};
2879                 $res{'status'} = [ split('', $4) ];
2880                 $res{'to_file'} = unquote($5);
2881         }
2882         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2883         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2884                 $res{'commit'} = $1;
2885         }
2886
2887         return wantarray ? %res : \%res;
2888 }
2889
2890 # wrapper: return parsed line of git-diff-tree "raw" output
2891 # (the argument might be raw line, or parsed info)
2892 sub parsed_difftree_line {
2893         my $line_or_ref = shift;
2894
2895         if (ref($line_or_ref) eq "HASH") {
2896                 # pre-parsed (or generated by hand)
2897                 return $line_or_ref;
2898         } else {
2899                 return parse_difftree_raw_line($line_or_ref);
2900         }
2901 }
2902
2903 # parse line of git-ls-tree output
2904 sub parse_ls_tree_line {
2905         my $line = shift;
2906         my %opts = @_;
2907         my %res;
2908
2909         if ($opts{'-l'}) {
2910                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2911                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2912
2913                 $res{'mode'} = $1;
2914                 $res{'type'} = $2;
2915                 $res{'hash'} = $3;
2916                 $res{'size'} = $4;
2917                 if ($opts{'-z'}) {
2918                         $res{'name'} = $5;
2919                 } else {
2920                         $res{'name'} = unquote($5);
2921                 }
2922         } else {
2923                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2924                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2925
2926                 $res{'mode'} = $1;
2927                 $res{'type'} = $2;
2928                 $res{'hash'} = $3;
2929                 if ($opts{'-z'}) {
2930                         $res{'name'} = $4;
2931                 } else {
2932                         $res{'name'} = unquote($4);
2933                 }
2934         }
2935
2936         return wantarray ? %res : \%res;
2937 }
2938
2939 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2940 sub parse_from_to_diffinfo {
2941         my ($diffinfo, $from, $to, @parents) = @_;
2942
2943         if ($diffinfo->{'nparents'}) {
2944                 # combined diff
2945                 $from->{'file'} = [];
2946                 $from->{'href'} = [];
2947                 fill_from_file_info($diffinfo, @parents)
2948                         unless exists $diffinfo->{'from_file'};
2949                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2950                         $from->{'file'}[$i] =
2951                                 defined $diffinfo->{'from_file'}[$i] ?
2952                                         $diffinfo->{'from_file'}[$i] :
2953                                         $diffinfo->{'to_file'};
2954                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2955                                 $from->{'href'}[$i] = href(action=>"blob",
2956                                                            hash_base=>$parents[$i],
2957                                                            hash=>$diffinfo->{'from_id'}[$i],
2958                                                            file_name=>$from->{'file'}[$i]);
2959                         } else {
2960                                 $from->{'href'}[$i] = undef;
2961                         }
2962                 }
2963         } else {
2964                 # ordinary (not combined) diff
2965                 $from->{'file'} = $diffinfo->{'from_file'};
2966                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2967                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2968                                                hash=>$diffinfo->{'from_id'},
2969                                                file_name=>$from->{'file'});
2970                 } else {
2971                         delete $from->{'href'};
2972                 }
2973         }
2974
2975         $to->{'file'} = $diffinfo->{'to_file'};
2976         if (!is_deleted($diffinfo)) { # file exists in result
2977                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2978                                      hash=>$diffinfo->{'to_id'},
2979                                      file_name=>$to->{'file'});
2980         } else {
2981                 delete $to->{'href'};
2982         }
2983 }
2984
2985 ## ......................................................................
2986 ## parse to array of hashes functions
2987
2988 sub git_get_heads_list {
2989         my $limit = shift;
2990         my @headslist;
2991
2992         open my $fd, '-|', git_cmd(), 'for-each-ref',
2993                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2994                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2995                 'refs/heads'
2996                 or return;
2997         while (my $line = <$fd>) {
2998                 my %ref_item;
2999
3000                 chomp $line;
3001                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3002                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3003                 my ($committer, $epoch, $tz) =
3004                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3005                 $ref_item{'fullname'}  = $name;
3006                 $name =~ s!^refs/heads/!!;
3007
3008                 $ref_item{'name'}  = $name;
3009                 $ref_item{'id'}    = $hash;
3010                 $ref_item{'title'} = $title || '(no commit message)';
3011                 $ref_item{'epoch'} = $epoch;
3012                 if ($epoch) {
3013                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3014                 } else {
3015                         $ref_item{'age'} = "unknown";
3016                 }
3017
3018                 push @headslist, \%ref_item;
3019         }
3020         close $fd;
3021
3022         return wantarray ? @headslist : \@headslist;
3023 }
3024
3025 sub git_get_tags_list {
3026         my $limit = shift;
3027         my @tagslist;
3028
3029         open my $fd, '-|', git_cmd(), 'for-each-ref',
3030                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3031                 '--format=%(objectname) %(objecttype) %(refname) '.
3032                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3033                 'refs/tags'
3034                 or return;
3035         while (my $line = <$fd>) {
3036                 my %ref_item;
3037
3038                 chomp $line;
3039                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3040                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3041                 my ($creator, $epoch, $tz) =
3042                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3043                 $ref_item{'fullname'} = $name;
3044                 $name =~ s!^refs/tags/!!;
3045
3046                 $ref_item{'type'} = $type;
3047                 $ref_item{'id'} = $id;
3048                 $ref_item{'name'} = $name;
3049                 if ($type eq "tag") {
3050                         $ref_item{'subject'} = $title;
3051                         $ref_item{'reftype'} = $reftype;
3052                         $ref_item{'refid'}   = $refid;
3053                 } else {
3054                         $ref_item{'reftype'} = $type;
3055                         $ref_item{'refid'}   = $id;
3056                 }
3057
3058                 if ($type eq "tag" || $type eq "commit") {
3059                         $ref_item{'epoch'} = $epoch;
3060                         if ($epoch) {
3061                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3062                         } else {
3063                                 $ref_item{'age'} = "unknown";
3064                         }
3065                 }
3066
3067                 push @tagslist, \%ref_item;
3068         }
3069         close $fd;
3070
3071         return wantarray ? @tagslist : \@tagslist;
3072 }
3073
3074 ## ----------------------------------------------------------------------
3075 ## filesystem-related functions
3076
3077 sub get_file_owner {
3078         my $path = shift;
3079
3080         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3081         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3082         if (!defined $gcos) {
3083                 return undef;
3084         }
3085         my $owner = $gcos;
3086         $owner =~ s/[,;].*$//;
3087         return to_utf8($owner);
3088 }
3089
3090 # assume that file exists
3091 sub insert_file {
3092         my $filename = shift;
3093
3094         open my $fd, '<', $filename;
3095         print map { to_utf8($_) } <$fd>;
3096         close $fd;
3097 }
3098
3099 ## ......................................................................
3100 ## mimetype related functions
3101
3102 sub mimetype_guess_file {
3103         my $filename = shift;
3104         my $mimemap = shift;
3105         -r $mimemap or return undef;
3106
3107         my %mimemap;
3108         open(my $mh, '<', $mimemap) or return undef;
3109         while (<$mh>) {
3110                 next if m/^#/; # skip comments
3111                 my ($mimetype, $exts) = split(/\t+/);
3112                 if (defined $exts) {
3113                         my @exts = split(/\s+/, $exts);
3114                         foreach my $ext (@exts) {
3115                                 $mimemap{$ext} = $mimetype;
3116                         }
3117                 }
3118         }
3119         close($mh);
3120
3121         $filename =~ /\.([^.]*)$/;
3122         return $mimemap{$1};
3123 }
3124
3125 sub mimetype_guess {
3126         my $filename = shift;
3127         my $mime;
3128         $filename =~ /\./ or return undef;
3129
3130         if ($mimetypes_file) {
3131                 my $file = $mimetypes_file;
3132                 if ($file !~ m!^/!) { # if it is relative path
3133                         # it is relative to project
3134                         $file = "$projectroot/$project/$file";
3135                 }
3136                 $mime = mimetype_guess_file($filename, $file);
3137         }
3138         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3139         return $mime;
3140 }
3141
3142 sub blob_mimetype {
3143         my $fd = shift;
3144         my $filename = shift;
3145
3146         if ($filename) {
3147                 my $mime = mimetype_guess($filename);
3148                 $mime and return $mime;
3149         }
3150
3151         # just in case
3152         return $default_blob_plain_mimetype unless $fd;
3153
3154         if (-T $fd) {
3155                 return 'text/plain';
3156         } elsif (! $filename) {
3157                 return 'application/octet-stream';
3158         } elsif ($filename =~ m/\.png$/i) {
3159                 return 'image/png';
3160         } elsif ($filename =~ m/\.gif$/i) {
3161                 return 'image/gif';
3162         } elsif ($filename =~ m/\.jpe?g$/i) {
3163                 return 'image/jpeg';
3164         } else {
3165                 return 'application/octet-stream';
3166         }
3167 }
3168
3169 sub blob_contenttype {
3170         my ($fd, $file_name, $type) = @_;
3171
3172         $type ||= blob_mimetype($fd, $file_name);
3173         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3174                 $type .= "; charset=$default_text_plain_charset";
3175         }
3176
3177         return $type;
3178 }
3179
3180 ## ======================================================================
3181 ## functions printing HTML: header, footer, error page
3182
3183 sub get_page_title {
3184         my $title = to_utf8($site_name);
3185
3186         return $title unless (defined $project);
3187         $title .= " - " . to_utf8($project);
3188
3189         return $title unless (defined $action);
3190         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3191
3192         return $title unless (defined $file_name);
3193         $title .= " - " . esc_path($file_name);
3194         if ($action eq "tree" && $file_name !~ m|/$|) {
3195                 $title .= "/";
3196         }
3197
3198         return $title;
3199 }
3200
3201 sub git_header_html {
3202         my $status = shift || "200 OK";
3203         my $expires = shift;
3204         my %opts = @_;
3205
3206         my $title = get_page_title();
3207         my $content_type;
3208         # require explicit support from the UA if we are to send the page as
3209         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3210         # we have to do this because MSIE sometimes globs '*/*', pretending to
3211         # support xhtml+xml but choking when it gets what it asked for.
3212         if (defined $cgi->http('HTTP_ACCEPT') &&
3213             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3214             $cgi->Accept('application/xhtml+xml') != 0) {
3215                 $content_type = 'application/xhtml+xml';
3216         } else {
3217                 $content_type = 'text/html';
3218         }
3219         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3220                            -status=> $status, -expires => $expires)
3221                 unless ($opts{'-no_http_headers'});
3222         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3223         print <<EOF;
3224 <?xml version="1.0" encoding="utf-8"?>
3225 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3226 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3227 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3228 <!-- git core binaries version $git_version -->
3229 <head>
3230 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3231 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3232 <meta name="robots" content="index, nofollow"/>
3233 <title>$title</title>
3234 EOF
3235         # the stylesheet, favicon etc urls won't work correctly with path_info
3236         # unless we set the appropriate base URL
3237         if ($ENV{'PATH_INFO'}) {
3238                 print "<base href=\"".esc_url($base_url)."\" />\n";
3239         }
3240         # print out each stylesheet that exist, providing backwards capability
3241         # for those people who defined $stylesheet in a config file
3242         if (defined $stylesheet) {
3243                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3244         } else {
3245                 foreach my $stylesheet (@stylesheets) {
3246                         next unless $stylesheet;
3247                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3248                 }
3249         }
3250         if (defined $project) {
3251                 my %href_params = get_feed_info();
3252                 if (!exists $href_params{'-title'}) {
3253                         $href_params{'-title'} = 'log';
3254                 }
3255
3256                 foreach my $format qw(RSS Atom) {
3257                         my $type = lc($format);
3258                         my %link_attr = (
3259                                 '-rel' => 'alternate',
3260                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3261                                 '-type' => "application/$type+xml"
3262                         );
3263
3264                         $href_params{'action'} = $type;
3265                         $link_attr{'-href'} = href(%href_params);
3266                         print "<link ".
3267                               "rel=\"$link_attr{'-rel'}\" ".
3268                               "title=\"$link_attr{'-title'}\" ".
3269                               "href=\"$link_attr{'-href'}\" ".
3270                               "type=\"$link_attr{'-type'}\" ".
3271                               "/>\n";
3272
3273                         $href_params{'extra_options'} = '--no-merges';
3274                         $link_attr{'-href'} = href(%href_params);
3275                         $link_attr{'-title'} .= ' (no merges)';
3276                         print "<link ".
3277                               "rel=\"$link_attr{'-rel'}\" ".
3278                               "title=\"$link_attr{'-title'}\" ".
3279                               "href=\"$link_attr{'-href'}\" ".
3280                               "type=\"$link_attr{'-type'}\" ".
3281                               "/>\n";
3282                 }
3283
3284         } else {
3285                 printf('<link rel="alternate" title="%s projects list" '.
3286                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3287                        $site_name, href(project=>undef, action=>"project_index"));
3288                 printf('<link rel="alternate" title="%s projects feeds" '.
3289                        'href="%s" type="text/x-opml" />'."\n",
3290                        $site_name, href(project=>undef, action=>"opml"));
3291         }
3292         if (defined $favicon) {
3293                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3294         }
3295
3296         print "</head>\n" .
3297               "<body>\n";
3298
3299         if (defined $site_header && -f $site_header) {
3300                 insert_file($site_header);
3301         }
3302
3303         print "<div class=\"page_header\">\n" .
3304               $cgi->a({-href => esc_url($logo_url),
3305                        -title => $logo_label},
3306                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3307         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3308         if (defined $project) {
3309                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3310                 if (defined $action) {
3311                         print " / $action";
3312                 }
3313                 print "\n";
3314         }
3315         print "</div>\n";
3316
3317         my $have_search = gitweb_check_feature('search');
3318         if (defined $project && $have_search) {
3319                 if (!defined $searchtext) {
3320                         $searchtext = "";
3321                 }
3322                 my $search_hash;
3323                 if (defined $hash_base) {
3324                         $search_hash = $hash_base;
3325                 } elsif (defined $hash) {
3326                         $search_hash = $hash;
3327                 } else {
3328                         $search_hash = "HEAD";
3329                 }
3330                 my $action = $my_uri;
3331                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3332                 if ($use_pathinfo) {
3333                         $action .= "/".esc_url($project);
3334                 }
3335                 print $cgi->startform(-method => "get", -action => $action) .
3336                       "<div class=\"search\">\n" .
3337                       (!$use_pathinfo &&
3338                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3339                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3340                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3341                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3342                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3343                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3344                       " search:\n",
3345                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3346                       "<span title=\"Extended regular expression\">" .
3347                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3348                                      -checked => $search_use_regexp) .
3349                       "</span>" .
3350                       "</div>" .
3351                       $cgi->end_form() . "\n";
3352         }
3353 }
3354
3355 sub git_footer_html {
3356         my $feed_class = 'rss_logo';
3357
3358         print "<div class=\"page_footer\">\n";
3359         if (defined $project) {
3360                 my $descr = git_get_project_description($project);
3361                 if (defined $descr) {
3362                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3363                 }
3364
3365                 my %href_params = get_feed_info();
3366                 if (!%href_params) {
3367                         $feed_class .= ' generic';
3368                 }
3369                 $href_params{'-title'} ||= 'log';
3370
3371                 foreach my $format qw(RSS Atom) {
3372                         $href_params{'action'} = lc($format);
3373                         print $cgi->a({-href => href(%href_params),
3374                                       -title => "$href_params{'-title'} $format feed",
3375                                       -class => $feed_class}, $format)."\n";
3376                 }
3377
3378         } else {
3379                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3380                               -class => $feed_class}, "OPML") . " ";
3381                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3382                               -class => $feed_class}, "TXT") . "\n";
3383         }
3384         print "</div>\n"; # class="page_footer"
3385
3386         if (defined $t0 && gitweb_check_feature('timed')) {
3387                 print "<div id=\"generating_info\">\n";
3388                 print 'This page took '.
3389                       '<span id="generating_time" class="time_span">'.
3390                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3391                       ' seconds </span>'.
3392                       ' and '.
3393                       '<span id="generating_cmd">'.
3394                       $number_of_git_cmds.
3395                       '</span> git commands '.
3396                       " to generate.\n";
3397                 print "</div>\n"; # class="page_footer"
3398         }
3399
3400         if (defined $site_footer && -f $site_footer) {
3401                 insert_file($site_footer);
3402         }
3403
3404         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3405         if (defined $action &&
3406             $action eq 'blame_incremental') {
3407                 print qq!<script type="text/javascript">\n!.
3408                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3409                       qq!           "!. href() .qq!");\n!.
3410                       qq!</script>\n!;
3411         } elsif (gitweb_check_feature('javascript-actions')) {
3412                 print qq!<script type="text/javascript">\n!.
3413                       qq!window.onload = fixLinks;\n!.
3414                       qq!</script>\n!;
3415         }
3416
3417         print "</body>\n" .
3418               "</html>";
3419 }
3420
3421 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3422 # Example: die_error(404, 'Hash not found')
3423 # By convention, use the following status codes (as defined in RFC 2616):
3424 # 400: Invalid or missing CGI parameters, or
3425 #      requested object exists but has wrong type.
3426 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3427 #      this server or project.
3428 # 404: Requested object/revision/project doesn't exist.
3429 # 500: The server isn't configured properly, or
3430 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3431 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3432 # 503: The server is currently unavailable (because it is overloaded,
3433 #      or down for maintenance).  Generally, this is a temporary state.
3434 sub die_error {
3435         my $status = shift || 500;
3436         my $error = esc_html(shift) || "Internal Server Error";
3437         my $extra = shift;
3438         my %opts = @_;
3439
3440         my %http_responses = (
3441                 400 => '400 Bad Request',
3442                 403 => '403 Forbidden',
3443                 404 => '404 Not Found',
3444                 500 => '500 Internal Server Error',
3445                 503 => '503 Service Unavailable',
3446         );
3447         git_header_html($http_responses{$status}, undef, %opts);
3448         print <<EOF;
3449 <div class="page_body">
3450 <br /><br />
3451 $status - $error
3452 <br />
3453 EOF
3454         if (defined $extra) {
3455                 print "<hr />\n" .
3456                       "$extra\n";
3457         }
3458         print "</div>\n";
3459
3460         git_footer_html();
3461         goto DONE_GITWEB
3462                 unless ($opts{'-error_handler'});
3463 }
3464
3465 ## ----------------------------------------------------------------------
3466 ## functions printing or outputting HTML: navigation
3467
3468 sub git_print_page_nav {
3469         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3470         $extra = '' if !defined $extra; # pager or formats
3471
3472         my @navs = qw(summary shortlog log commit commitdiff tree);
3473         if ($suppress) {
3474                 @navs = grep { $_ ne $suppress } @navs;
3475         }
3476
3477         my %arg = map { $_ => {action=>$_} } @navs;
3478         if (defined $head) {
3479                 for (qw(commit commitdiff)) {
3480                         $arg{$_}{'hash'} = $head;
3481                 }
3482                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3483                         for (qw(shortlog log)) {
3484                                 $arg{$_}{'hash'} = $head;
3485                         }
3486                 }
3487         }
3488
3489         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3490         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3491
3492         my @actions = gitweb_get_feature('actions');
3493         my %repl = (
3494                 '%' => '%',
3495                 'n' => $project,         # project name
3496                 'f' => $git_dir,         # project path within filesystem
3497                 'h' => $treehead || '',  # current hash ('h' parameter)
3498                 'b' => $treebase || '',  # hash base ('hb' parameter)
3499         );
3500         while (@actions) {
3501                 my ($label, $link, $pos) = splice(@actions,0,3);
3502                 # insert
3503                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3504                 # munch munch
3505                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3506                 $arg{$label}{'_href'} = $link;
3507         }
3508
3509         print "<div class=\"page_nav\">\n" .
3510                 (join " | ",
3511                  map { $_ eq $current ?
3512                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3513                  } @navs);
3514         print "<br/>\n$extra<br/>\n" .
3515               "</div>\n";
3516 }
3517
3518 sub format_paging_nav {
3519         my ($action, $page, $has_next_link) = @_;
3520         my $paging_nav;
3521
3522
3523         if ($page > 0) {
3524                 $paging_nav .=
3525                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3526                         " &sdot; " .
3527                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3528                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3529         } else {
3530                 $paging_nav .= "first &sdot; prev";
3531         }
3532
3533         if ($has_next_link) {
3534                 $paging_nav .= " &sdot; " .
3535                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3536                                  -accesskey => "n", -title => "Alt-n"}, "next");
3537         } else {
3538                 $paging_nav .= " &sdot; next";
3539         }
3540
3541         return $paging_nav;
3542 }
3543
3544 ## ......................................................................
3545 ## functions printing or outputting HTML: div
3546
3547 sub git_print_header_div {
3548         my ($action, $title, $hash, $hash_base) = @_;
3549         my %args = ();
3550
3551         $args{'action'} = $action;
3552         $args{'hash'} = $hash if $hash;
3553         $args{'hash_base'} = $hash_base if $hash_base;
3554
3555         print "<div class=\"header\">\n" .
3556               $cgi->a({-href => href(%args), -class => "title"},
3557               $title ? $title : $action) .
3558               "\n</div>\n";
3559 }
3560
3561 sub print_local_time {
3562         print format_local_time(@_);
3563 }
3564
3565 sub format_local_time {
3566         my $localtime = '';
3567         my %date = @_;
3568         if ($date{'hour_local'} < 6) {
3569                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3570                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3571         } else {
3572                 $localtime .= sprintf(" (%02d:%02d %s)",
3573                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3574         }
3575
3576         return $localtime;
3577 }
3578
3579 # Outputs the author name and date in long form
3580 sub git_print_authorship {
3581         my $co = shift;
3582         my %opts = @_;
3583         my $tag = $opts{-tag} || 'div';
3584         my $author = $co->{'author_name'};
3585
3586         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3587         print "<$tag class=\"author_date\">" .
3588               format_search_author($author, "author", esc_html($author)) .
3589               " [$ad{'rfc2822'}";
3590         print_local_time(%ad) if ($opts{-localtime});
3591         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3592                   . "</$tag>\n";
3593 }
3594
3595 # Outputs table rows containing the full author or committer information,
3596 # in the format expected for 'commit' view (& similia).
3597 # Parameters are a commit hash reference, followed by the list of people
3598 # to output information for. If the list is empty it defalts to both
3599 # author and committer.
3600 sub git_print_authorship_rows {
3601         my $co = shift;
3602         # too bad we can't use @people = @_ || ('author', 'committer')
3603         my @people = @_;
3604         @people = ('author', 'committer') unless @people;
3605         foreach my $who (@people) {
3606                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3607                 print "<tr><td>$who</td><td>" .
3608                       format_search_author($co->{"${who}_name"}, $who,
3609                                esc_html($co->{"${who}_name"})) . " " .
3610                       format_search_author($co->{"${who}_email"}, $who,
3611                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3612                       "</td><td rowspan=\"2\">" .
3613                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3614                       "</td></tr>\n" .
3615                       "<tr>" .
3616                       "<td></td><td> $wd{'rfc2822'}";
3617                 print_local_time(%wd);
3618                 print "</td>" .
3619                       "</tr>\n";
3620         }
3621 }
3622
3623 sub git_print_page_path {
3624         my $name = shift;
3625         my $type = shift;
3626         my $hb = shift;
3627
3628
3629         print "<div class=\"page_path\">";
3630         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3631                       -title => 'tree root'}, to_utf8("[$project]"));
3632         print " / ";
3633         if (defined $name) {
3634                 my @dirname = split '/', $name;
3635                 my $basename = pop @dirname;
3636                 my $fullname = '';
3637
3638                 foreach my $dir (@dirname) {
3639                         $fullname .= ($fullname ? '/' : '') . $dir;
3640                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3641                                                      hash_base=>$hb),
3642                                       -title => $fullname}, esc_path($dir));
3643                         print " / ";
3644                 }
3645                 if (defined $type && $type eq 'blob') {
3646                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3647                                                      hash_base=>$hb),
3648                                       -title => $name}, esc_path($basename));
3649                 } elsif (defined $type && $type eq 'tree') {
3650                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3651                                                      hash_base=>$hb),
3652                                       -title => $name}, esc_path($basename));
3653                         print " / ";
3654                 } else {
3655                         print esc_path($basename);
3656                 }
3657         }
3658         print "<br/></div>\n";
3659 }
3660
3661 sub git_print_log {
3662         my $log = shift;
3663         my %opts = @_;
3664
3665         if ($opts{'-remove_title'}) {
3666                 # remove title, i.e. first line of log
3667                 shift @$log;
3668         }
3669         # remove leading empty lines
3670         while (defined $log->[0] && $log->[0] eq "") {
3671                 shift @$log;
3672         }
3673
3674         # print log
3675         my $signoff = 0;
3676         my $empty = 0;
3677         foreach my $line (@$log) {
3678                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3679                         $signoff = 1;
3680                         $empty = 0;
3681                         if (! $opts{'-remove_signoff'}) {
3682                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3683                                 next;
3684                         } else {
3685                                 # remove signoff lines
3686                                 next;
3687                         }
3688                 } else {
3689                         $signoff = 0;
3690                 }
3691
3692                 # print only one empty line
3693                 # do not print empty line after signoff
3694                 if ($line eq "") {
3695                         next if ($empty || $signoff);
3696                         $empty = 1;
3697                 } else {
3698                         $empty = 0;
3699                 }
3700
3701                 print format_log_line_html($line) . "<br/>\n";
3702         }
3703
3704         if ($opts{'-final_empty_line'}) {
3705                 # end with single empty line
3706                 print "<br/>\n" unless $empty;
3707         }
3708 }
3709
3710 # return link target (what link points to)
3711 sub git_get_link_target {
3712         my $hash = shift;
3713         my $link_target;
3714
3715         # read link
3716         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3717                 or return;
3718         {
3719                 local $/ = undef;
3720                 $link_target = <$fd>;
3721         }
3722         close $fd
3723                 or return;
3724
3725         return $link_target;
3726 }
3727
3728 # given link target, and the directory (basedir) the link is in,
3729 # return target of link relative to top directory (top tree);
3730 # return undef if it is not possible (including absolute links).
3731 sub normalize_link_target {
3732         my ($link_target, $basedir) = @_;
3733
3734         # absolute symlinks (beginning with '/') cannot be normalized
3735         return if (substr($link_target, 0, 1) eq '/');
3736
3737         # normalize link target to path from top (root) tree (dir)
3738         my $path;
3739         if ($basedir) {
3740                 $path = $basedir . '/' . $link_target;
3741         } else {
3742                 # we are in top (root) tree (dir)
3743                 $path = $link_target;
3744         }
3745
3746         # remove //, /./, and /../
3747         my @path_parts;
3748         foreach my $part (split('/', $path)) {
3749                 # discard '.' and ''
3750                 next if (!$part || $part eq '.');
3751                 # handle '..'
3752                 if ($part eq '..') {
3753                         if (@path_parts) {
3754                                 pop @path_parts;
3755                         } else {
3756                                 # link leads outside repository (outside top dir)
3757                                 return;
3758                         }
3759                 } else {
3760                         push @path_parts, $part;
3761                 }
3762         }
3763         $path = join('/', @path_parts);
3764
3765         return $path;
3766 }
3767
3768 # print tree entry (row of git_tree), but without encompassing <tr> element
3769 sub git_print_tree_entry {
3770         my ($t, $basedir, $hash_base, $have_blame) = @_;
3771
3772         my %base_key = ();
3773         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3774
3775         # The format of a table row is: mode list link.  Where mode is
3776         # the mode of the entry, list is the name of the entry, an href,
3777         # and link is the action links of the entry.
3778
3779         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3780         if (exists $t->{'size'}) {
3781                 print "<td class=\"size\">$t->{'size'}</td>\n";
3782         }
3783         if ($t->{'type'} eq "blob") {
3784                 print "<td class=\"list\">" .
3785                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3786                                                file_name=>"$basedir$t->{'name'}", %base_key),
3787                                 -class => "list"}, esc_path($t->{'name'}));
3788                 if (S_ISLNK(oct $t->{'mode'})) {
3789                         my $link_target = git_get_link_target($t->{'hash'});
3790                         if ($link_target) {
3791                                 my $norm_target = normalize_link_target($link_target, $basedir);
3792                                 if (defined $norm_target) {
3793                                         print " -> " .
3794                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3795                                                                      file_name=>$norm_target),
3796                                                        -title => $norm_target}, esc_path($link_target));
3797                                 } else {
3798                                         print " -> " . esc_path($link_target);
3799                                 }
3800                         }
3801                 }
3802                 print "</td>\n";
3803                 print "<td class=\"link\">";
3804                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3805                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3806                               "blob");
3807                 if ($have_blame) {
3808                         print " | " .
3809                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3810                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3811                                       "blame");
3812                 }
3813                 if (defined $hash_base) {
3814                         print " | " .
3815                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3816                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3817                                       "history");
3818                 }
3819                 print " | " .
3820                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3821                                                file_name=>"$basedir$t->{'name'}")},
3822                                 "raw");
3823                 print "</td>\n";
3824
3825         } elsif ($t->{'type'} eq "tree") {
3826                 print "<td class=\"list\">";
3827                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3828                                              file_name=>"$basedir$t->{'name'}",
3829                                              %base_key)},
3830                               esc_path($t->{'name'}));
3831                 print "</td>\n";
3832                 print "<td class=\"link\">";
3833                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3834                                              file_name=>"$basedir$t->{'name'}",
3835                                              %base_key)},
3836                               "tree");
3837                 if (defined $hash_base) {
3838                         print " | " .
3839                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3840                                                      file_name=>"$basedir$t->{'name'}")},
3841                                       "history");
3842                 }
3843                 print "</td>\n";
3844         } else {
3845                 # unknown object: we can only present history for it
3846                 # (this includes 'commit' object, i.e. submodule support)
3847                 print "<td class=\"list\">" .
3848                       esc_path($t->{'name'}) .
3849                       "</td>\n";
3850                 print "<td class=\"link\">";
3851                 if (defined $hash_base) {
3852                         print $cgi->a({-href => href(action=>"history",
3853                                                      hash_base=>$hash_base,
3854                                                      file_name=>"$basedir$t->{'name'}")},
3855                                       "history");
3856                 }
3857                 print "</td>\n";
3858         }
3859 }
3860
3861 ## ......................................................................
3862 ## functions printing large fragments of HTML
3863
3864 # get pre-image filenames for merge (combined) diff
3865 sub fill_from_file_info {
3866         my ($diff, @parents) = @_;
3867
3868         $diff->{'from_file'} = [ ];
3869         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3870         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3871                 if ($diff->{'status'}[$i] eq 'R' ||
3872                     $diff->{'status'}[$i] eq 'C') {
3873                         $diff->{'from_file'}[$i] =
3874                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3875                 }
3876         }
3877
3878         return $diff;
3879 }
3880
3881 # is current raw difftree line of file deletion
3882 sub is_deleted {
3883         my $diffinfo = shift;
3884
3885         return $diffinfo->{'to_id'} eq ('0' x 40);
3886 }
3887
3888 # does patch correspond to [previous] difftree raw line
3889 # $diffinfo  - hashref of parsed raw diff format
3890 # $patchinfo - hashref of parsed patch diff format
3891 #              (the same keys as in $diffinfo)
3892 sub is_patch_split {
3893         my ($diffinfo, $patchinfo) = @_;
3894
3895         return defined $diffinfo && defined $patchinfo
3896                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3897 }
3898
3899
3900 sub git_difftree_body {
3901         my ($difftree, $hash, @parents) = @_;
3902         my ($parent) = $parents[0];
3903         my $have_blame = gitweb_check_feature('blame');
3904         print "<div class=\"list_head\">\n";
3905         if ($#{$difftree} > 10) {
3906                 print(($#{$difftree} + 1) . " files changed:\n");
3907         }
3908         print "</div>\n";
3909
3910         print "<table class=\"" .
3911               (@parents > 1 ? "combined " : "") .
3912               "diff_tree\">\n";
3913
3914         # header only for combined diff in 'commitdiff' view
3915         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3916         if ($has_header) {
3917                 # table header
3918                 print "<thead><tr>\n" .
3919                        "<th></th><th></th>\n"; # filename, patchN link
3920                 for (my $i = 0; $i < @parents; $i++) {
3921                         my $par = $parents[$i];
3922                         print "<th>" .
3923                               $cgi->a({-href => href(action=>"commitdiff",
3924                                                      hash=>$hash, hash_parent=>$par),
3925                                        -title => 'commitdiff to parent number ' .
3926                                                   ($i+1) . ': ' . substr($par,0,7)},
3927                                       $i+1) .
3928                               "&nbsp;</th>\n";
3929                 }
3930                 print "</tr></thead>\n<tbody>\n";
3931         }
3932
3933         my $alternate = 1;
3934         my $patchno = 0;
3935         foreach my $line (@{$difftree}) {
3936                 my $diff = parsed_difftree_line($line);
3937
3938                 if ($alternate) {
3939                         print "<tr class=\"dark\">\n";
3940                 } else {
3941                         print "<tr class=\"light\">\n";
3942                 }
3943                 $alternate ^= 1;
3944
3945                 if (exists $diff->{'nparents'}) { # combined diff
3946
3947                         fill_from_file_info($diff, @parents)
3948                                 unless exists $diff->{'from_file'};
3949
3950                         if (!is_deleted($diff)) {
3951                                 # file exists in the result (child) commit
3952                                 print "<td>" .
3953                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3954                                                              file_name=>$diff->{'to_file'},
3955                                                              hash_base=>$hash),
3956                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3957                                       "</td>\n";
3958                         } else {
3959                                 print "<td>" .
3960                                       esc_path($diff->{'to_file'}) .
3961                                       "</td>\n";
3962                         }
3963
3964                         if ($action eq 'commitdiff') {
3965                                 # link to patch
3966                                 $patchno++;
3967                                 print "<td class=\"link\">" .
3968                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3969                                       " | " .
3970                                       "</td>\n";
3971                         }
3972
3973                         my $has_history = 0;
3974                         my $not_deleted = 0;
3975                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3976                                 my $hash_parent = $parents[$i];
3977                                 my $from_hash = $diff->{'from_id'}[$i];
3978                                 my $from_path = $diff->{'from_file'}[$i];
3979                                 my $status = $diff->{'status'}[$i];
3980
3981                                 $has_history ||= ($status ne 'A');
3982                                 $not_deleted ||= ($status ne 'D');
3983
3984                                 if ($status eq 'A') {
3985                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3986                                 } elsif ($status eq 'D') {
3987                                         print "<td class=\"link\">" .
3988                                               $cgi->a({-href => href(action=>"blob",
3989                                                                      hash_base=>$hash,
3990                                                                      hash=>$from_hash,
3991                                                                      file_name=>$from_path)},
3992                                                       "blob" . ($i+1)) .
3993                                               " | </td>\n";
3994                                 } else {
3995                                         if ($diff->{'to_id'} eq $from_hash) {
3996                                                 print "<td class=\"link nochange\">";
3997                                         } else {
3998                                                 print "<td class=\"link\">";
3999                                         }
4000                                         print $cgi->a({-href => href(action=>"blobdiff",
4001                                                                      hash=>$diff->{'to_id'},
4002                                                                      hash_parent=>$from_hash,
4003                                                                      hash_base=>$hash,
4004                                                                      hash_parent_base=>$hash_parent,
4005                                                                      file_name=>$diff->{'to_file'},
4006                                                                      file_parent=>$from_path)},
4007                                                       "diff" . ($i+1)) .
4008                                               " | </td>\n";
4009                                 }
4010                         }
4011
4012                         print "<td class=\"link\">";
4013                         if ($not_deleted) {
4014                                 print $cgi->a({-href => href(action=>"blob",
4015                                                              hash=>$diff->{'to_id'},
4016                                                              file_name=>$diff->{'to_file'},
4017                                                              hash_base=>$hash)},
4018                                               "blob");
4019                                 print " | " if ($has_history);
4020                         }
4021                         if ($has_history) {
4022                                 print $cgi->a({-href => href(action=>"history",
4023                                                              file_name=>$diff->{'to_file'},
4024                                                              hash_base=>$hash)},
4025                                               "history");
4026                         }
4027                         print "</td>\n";
4028
4029                         print "</tr>\n";
4030                         next; # instead of 'else' clause, to avoid extra indent
4031                 }
4032                 # else ordinary diff
4033
4034                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4035                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4036                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4037                         $to_mode_oct = oct $diff->{'to_mode'};
4038                         if (S_ISREG($to_mode_oct)) { # only for regular file
4039                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4040                         }
4041                         $to_file_type = file_type($diff->{'to_mode'});
4042                 }
4043                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4044                         $from_mode_oct = oct $diff->{'from_mode'};
4045                         if (S_ISREG($to_mode_oct)) { # only for regular file
4046                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4047                         }
4048                         $from_file_type = file_type($diff->{'from_mode'});
4049                 }
4050
4051                 if ($diff->{'status'} eq "A") { # created
4052                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4053                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4054                         $mode_chng   .= "]</span>";
4055                         print "<td>";
4056                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4057                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4058                                       -class => "list"}, esc_path($diff->{'file'}));
4059                         print "</td>\n";
4060                         print "<td>$mode_chng</td>\n";
4061                         print "<td class=\"link\">";
4062                         if ($action eq 'commitdiff') {
4063                                 # link to patch
4064                                 $patchno++;
4065                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4066                                 print " | ";
4067                         }
4068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4069                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4070                                       "blob");
4071                         print "</td>\n";
4072
4073                 } elsif ($diff->{'status'} eq "D") { # deleted
4074                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4075                         print "<td>";
4076                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4077                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4078                                        -class => "list"}, esc_path($diff->{'file'}));
4079                         print "</td>\n";
4080                         print "<td>$mode_chng</td>\n";
4081                         print "<td class=\"link\">";
4082                         if ($action eq 'commitdiff') {
4083                                 # link to patch
4084                                 $patchno++;
4085                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4086                                 print " | ";
4087                         }
4088                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4089                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4090                                       "blob") . " | ";
4091                         if ($have_blame) {
4092                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4093                                                              file_name=>$diff->{'file'})},
4094                                               "blame") . " | ";
4095                         }
4096                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4097                                                      file_name=>$diff->{'file'})},
4098                                       "history");
4099                         print "</td>\n";
4100
4101                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4102                         my $mode_chnge = "";
4103                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4104                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4105                                 if ($from_file_type ne $to_file_type) {
4106                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4107                                 }
4108                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4109                                         if ($from_mode_str && $to_mode_str) {
4110                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4111                                         } elsif ($to_mode_str) {
4112                                                 $mode_chnge .= " mode: $to_mode_str";
4113                                         }
4114                                 }
4115                                 $mode_chnge .= "]</span>\n";
4116                         }
4117                         print "<td>";
4118                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4119                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4120                                       -class => "list"}, esc_path($diff->{'file'}));
4121                         print "</td>\n";
4122                         print "<td>$mode_chnge</td>\n";
4123                         print "<td class=\"link\">";
4124                         if ($action eq 'commitdiff') {
4125                                 # link to patch
4126                                 $patchno++;
4127                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4128                                       " | ";
4129                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4130                                 # "commit" view and modified file (not onlu mode changed)
4131                                 print $cgi->a({-href => href(action=>"blobdiff",
4132                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4133                                                              hash_base=>$hash, hash_parent_base=>$parent,
4134                                                              file_name=>$diff->{'file'})},
4135                                               "diff") .
4136                                       " | ";
4137                         }
4138                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4139                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4140                                        "blob") . " | ";
4141                         if ($have_blame) {
4142                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4143                                                              file_name=>$diff->{'file'})},
4144                                               "blame") . " | ";
4145                         }
4146                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4147                                                      file_name=>$diff->{'file'})},
4148                                       "history");
4149                         print "</td>\n";
4150
4151                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4152                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4153                         my $nstatus = $status_name{$diff->{'status'}};
4154                         my $mode_chng = "";
4155                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4156                                 # mode also for directories, so we cannot use $to_mode_str
4157                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4158                         }
4159                         print "<td>" .
4160                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4161                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4162                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4163                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4164                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4165                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4166                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4167                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4168                               "<td class=\"link\">";
4169                         if ($action eq 'commitdiff') {
4170                                 # link to patch
4171                                 $patchno++;
4172                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4173                                       " | ";
4174                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4175                                 # "commit" view and modified file (not only pure rename or copy)
4176                                 print $cgi->a({-href => href(action=>"blobdiff",
4177                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4178                                                              hash_base=>$hash, hash_parent_base=>$parent,
4179                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4180                                               "diff") .
4181                                       " | ";
4182                         }
4183                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4184                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4185                                       "blob") . " | ";
4186                         if ($have_blame) {
4187                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4188                                                              file_name=>$diff->{'to_file'})},
4189                                               "blame") . " | ";
4190                         }
4191                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4192                                                     file_name=>$diff->{'to_file'})},
4193                                       "history");
4194                         print "</td>\n";
4195
4196                 } # we should not encounter Unmerged (U) or Unknown (X) status
4197                 print "</tr>\n";
4198         }
4199         print "</tbody>" if $has_header;
4200         print "</table>\n";
4201 }
4202
4203 sub git_patchset_body {
4204         my ($fd, $difftree, $hash, @hash_parents) = @_;
4205         my ($hash_parent) = $hash_parents[0];
4206
4207         my $is_combined = (@hash_parents > 1);
4208         my $patch_idx = 0;
4209         my $patch_number = 0;
4210         my $patch_line;
4211         my $diffinfo;
4212         my $to_name;
4213         my (%from, %to);
4214
4215         print "<div class=\"patchset\">\n";
4216
4217         # skip to first patch
4218         while ($patch_line = <$fd>) {
4219                 chomp $patch_line;
4220
4221                 last if ($patch_line =~ m/^diff /);
4222         }
4223
4224  PATCH:
4225         while ($patch_line) {
4226
4227                 # parse "git diff" header line
4228                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4229                         # $1 is from_name, which we do not use
4230                         $to_name = unquote($2);
4231                         $to_name =~ s!^b/!!;
4232                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4233                         # $1 is 'cc' or 'combined', which we do not use
4234                         $to_name = unquote($2);
4235                 } else {
4236                         $to_name = undef;
4237                 }
4238
4239                 # check if current patch belong to current raw line
4240                 # and parse raw git-diff line if needed
4241                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4242                         # this is continuation of a split patch
4243                         print "<div class=\"patch cont\">\n";
4244                 } else {
4245                         # advance raw git-diff output if needed
4246                         $patch_idx++ if defined $diffinfo;
4247
4248                         # read and prepare patch information
4249                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4250
4251                         # compact combined diff output can have some patches skipped
4252                         # find which patch (using pathname of result) we are at now;
4253                         if ($is_combined) {
4254                                 while ($to_name ne $diffinfo->{'to_file'}) {
4255                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4256                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4257                                               "</div>\n";  # class="patch"
4258
4259                                         $patch_idx++;
4260                                         $patch_number++;
4261
4262                                         last if $patch_idx > $#$difftree;
4263                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4264                                 }
4265                         }
4266
4267                         # modifies %from, %to hashes
4268                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4269
4270                         # this is first patch for raw difftree line with $patch_idx index
4271                         # we index @$difftree array from 0, but number patches from 1
4272                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4273                 }
4274
4275                 # git diff header
4276                 #assert($patch_line =~ m/^diff /) if DEBUG;
4277                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4278                 $patch_number++;
4279                 # print "git diff" header
4280                 print format_git_diff_header_line($patch_line, $diffinfo,
4281                                                   \%from, \%to);
4282
4283                 # print extended diff header
4284                 print "<div class=\"diff extended_header\">\n";
4285         EXTENDED_HEADER:
4286                 while ($patch_line = <$fd>) {
4287                         chomp $patch_line;
4288
4289                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4290
4291                         print format_extended_diff_header_line($patch_line, $diffinfo,
4292                                                                \%from, \%to);
4293                 }
4294                 print "</div>\n"; # class="diff extended_header"
4295
4296                 # from-file/to-file diff header
4297                 if (! $patch_line) {
4298                         print "</div>\n"; # class="patch"
4299                         last PATCH;
4300                 }
4301                 next PATCH if ($patch_line =~ m/^diff /);
4302                 #assert($patch_line =~ m/^---/) if DEBUG;
4303
4304                 my $last_patch_line = $patch_line;
4305                 $patch_line = <$fd>;
4306                 chomp $patch_line;
4307                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4308
4309                 print format_diff_from_to_header($last_patch_line, $patch_line,
4310                                                  $diffinfo, \%from, \%to,
4311                                                  @hash_parents);
4312
4313                 # the patch itself
4314         LINE:
4315                 while ($patch_line = <$fd>) {
4316                         chomp $patch_line;
4317
4318                         next PATCH if ($patch_line =~ m/^diff /);
4319
4320                         print format_diff_line($patch_line, \%from, \%to);
4321                 }
4322
4323         } continue {
4324                 print "</div>\n"; # class="patch"
4325         }
4326
4327         # for compact combined (--cc) format, with chunk and patch simpliciaction
4328         # patchset might be empty, but there might be unprocessed raw lines
4329         for (++$patch_idx if $patch_number > 0;
4330              $patch_idx < @$difftree;
4331              ++$patch_idx) {
4332                 # read and prepare patch information
4333                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4334
4335                 # generate anchor for "patch" links in difftree / whatchanged part
4336                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4337                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4338                       "</div>\n";  # class="patch"
4339
4340                 $patch_number++;
4341         }
4342
4343         if ($patch_number == 0) {
4344                 if (@hash_parents > 1) {
4345                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4346                 } else {
4347                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4348                 }
4349         }
4350
4351         print "</div>\n"; # class="patchset"
4352 }
4353
4354 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4355
4356 # fills project list info (age, description, owner, forks) for each
4357 # project in the list, removing invalid projects from returned list
4358 # NOTE: modifies $projlist, but does not remove entries from it
4359 sub fill_project_list_info {
4360         my ($projlist, $check_forks) = @_;
4361         my @projects;
4362
4363         my $show_ctags = gitweb_check_feature('ctags');
4364  PROJECT:
4365         foreach my $pr (@$projlist) {
4366                 my (@activity) = git_get_last_activity($pr->{'path'});
4367                 unless (@activity) {
4368                         next PROJECT;
4369                 }
4370                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4371                 if (!defined $pr->{'descr'}) {
4372                         my $descr = git_get_project_description($pr->{'path'}) || "";
4373                         $descr = to_utf8($descr);
4374                         $pr->{'descr_long'} = $descr;
4375                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4376                 }
4377                 if (!defined $pr->{'owner'}) {
4378                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4379                 }
4380                 if ($check_forks) {
4381                         my $pname = $pr->{'path'};
4382                         if (($pname =~ s/\.git$//) &&
4383                             ($pname !~ /\/$/) &&
4384                             (-d "$projectroot/$pname")) {
4385                                 $pr->{'forks'} = "-d $projectroot/$pname";
4386                         } else {
4387                                 $pr->{'forks'} = 0;
4388                         }
4389                 }
4390                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4391                 push @projects, $pr;
4392         }
4393
4394         return @projects;
4395 }
4396
4397 # print 'sort by' <th> element, generating 'sort by $name' replay link
4398 # if that order is not selected
4399 sub print_sort_th {
4400         print format_sort_th(@_);
4401 }
4402
4403 sub format_sort_th {
4404         my ($name, $order, $header) = @_;
4405         my $sort_th = "";
4406         $header ||= ucfirst($name);
4407
4408         if ($order eq $name) {
4409                 $sort_th .= "<th>$header</th>\n";
4410         } else {
4411                 $sort_th .= "<th>" .
4412                             $cgi->a({-href => href(-replay=>1, order=>$name),
4413                                      -class => "header"}, $header) .
4414                             "</th>\n";
4415         }
4416
4417         return $sort_th;
4418 }
4419
4420 sub git_project_list_body {
4421         # actually uses global variable $project
4422         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4423
4424         my $check_forks = gitweb_check_feature('forks');
4425         my @projects = fill_project_list_info($projlist, $check_forks);
4426
4427         $order ||= $default_projects_order;
4428         $from = 0 unless defined $from;
4429         $to = $#projects if (!defined $to || $#projects < $to);
4430
4431         my %order_info = (
4432                 project => { key => 'path', type => 'str' },
4433                 descr => { key => 'descr_long', type => 'str' },
4434                 owner => { key => 'owner', type => 'str' },
4435                 age => { key => 'age', type => 'num' }
4436         );
4437         my $oi = $order_info{$order};
4438         if ($oi->{'type'} eq 'str') {
4439                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4440         } else {
4441                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4442         }
4443
4444         my $show_ctags = gitweb_check_feature('ctags');
4445         if ($show_ctags) {
4446                 my %ctags;
4447                 foreach my $p (@projects) {
4448                         foreach my $ct (keys %{$p->{'ctags'}}) {
4449                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4450                         }
4451                 }
4452                 my $cloud = git_populate_project_tagcloud(\%ctags);
4453                 print git_show_project_tagcloud($cloud, 64);
4454         }
4455
4456         print "<table class=\"project_list\">\n";
4457         unless ($no_header) {
4458                 print "<tr>\n";
4459                 if ($check_forks) {
4460                         print "<th></th>\n";
4461                 }
4462                 print_sort_th('project', $order, 'Project');
4463                 print_sort_th('descr', $order, 'Description');
4464                 print_sort_th('owner', $order, 'Owner');
4465                 print_sort_th('age', $order, 'Last Change');
4466                 print "<th></th>\n" . # for links
4467                       "</tr>\n";
4468         }
4469         my $alternate = 1;
4470         my $tagfilter = $cgi->param('by_tag');
4471         for (my $i = $from; $i <= $to; $i++) {
4472                 my $pr = $projects[$i];
4473
4474                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4475                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4476                         and not $pr->{'descr_long'} =~ /$searchtext/;
4477                 # Weed out forks or non-matching entries of search
4478                 if ($check_forks) {
4479                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4480                         $forkbase="^$forkbase" if $forkbase;
4481                         next if not $searchtext and not $tagfilter and $show_ctags
4482                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4483                 }
4484
4485                 if ($alternate) {
4486                         print "<tr class=\"dark\">\n";
4487                 } else {
4488                         print "<tr class=\"light\">\n";
4489                 }
4490                 $alternate ^= 1;
4491                 if ($check_forks) {
4492                         print "<td>";
4493                         if ($pr->{'forks'}) {
4494                                 print "<!-- $pr->{'forks'} -->\n";
4495                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4496                         }
4497                         print "</td>\n";
4498                 }
4499                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4500                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4501                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4502                                         -class => "list", -title => $pr->{'descr_long'}},
4503                                         esc_html($pr->{'descr'})) . "</td>\n" .
4504                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4505                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4506                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4507                       "<td class=\"link\">" .
4508                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4509                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4510                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4511                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4512                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4513                       "</td>\n" .
4514                       "</tr>\n";
4515         }
4516         if (defined $extra) {
4517                 print "<tr>\n";
4518                 if ($check_forks) {
4519                         print "<td></td>\n";
4520                 }
4521                 print "<td colspan=\"5\">$extra</td>\n" .
4522                       "</tr>\n";
4523         }
4524         print "</table>\n";
4525 }
4526
4527 sub git_log_body {
4528         # uses global variable $project
4529         my ($commitlist, $from, $to, $refs, $extra) = @_;
4530
4531         $from = 0 unless defined $from;
4532         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4533
4534         for (my $i = 0; $i <= $to; $i++) {
4535                 my %co = %{$commitlist->[$i]};
4536                 next if !%co;
4537                 my $commit = $co{'id'};
4538                 my $ref = format_ref_marker($refs, $commit);
4539                 my %ad = parse_date($co{'author_epoch'});
4540                 git_print_header_div('commit',
4541                                "<span class=\"age\">$co{'age_string'}</span>" .
4542                                esc_html($co{'title'}) . $ref,
4543                                $commit);
4544                 print "<div class=\"title_text\">\n" .
4545                       "<div class=\"log_link\">\n" .
4546                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4547                       " | " .
4548                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4549                       " | " .
4550                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4551                       "<br/>\n" .
4552                       "</div>\n";
4553                       git_print_authorship(\%co, -tag => 'span');
4554                       print "<br/>\n</div>\n";
4555
4556                 print "<div class=\"log_body\">\n";
4557                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4558                 print "</div>\n";
4559         }
4560         if ($extra) {
4561                 print "<div class=\"page_nav\">\n";
4562                 print "$extra\n";
4563                 print "</div>\n";
4564         }
4565 }
4566
4567 sub git_shortlog_body {
4568         # uses global variable $project
4569         my ($commitlist, $from, $to, $refs, $extra) = @_;
4570
4571         $from = 0 unless defined $from;
4572         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4573
4574         print "<table class=\"shortlog\">\n";
4575         my $alternate = 1;
4576         for (my $i = $from; $i <= $to; $i++) {
4577                 my %co = %{$commitlist->[$i]};
4578                 my $commit = $co{'id'};
4579                 my $ref = format_ref_marker($refs, $commit);
4580                 if ($alternate) {
4581                         print "<tr class=\"dark\">\n";
4582                 } else {
4583                         print "<tr class=\"light\">\n";
4584                 }
4585                 $alternate ^= 1;
4586                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4587                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4588                       format_author_html('td', \%co, 10) . "<td>";
4589                 print format_subject_html($co{'title'}, $co{'title_short'},
4590                                           href(action=>"commit", hash=>$commit), $ref);
4591                 print "</td>\n" .
4592                       "<td class=\"link\">" .
4593                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4594                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4595                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4596                 my $snapshot_links = format_snapshot_links($commit);
4597                 if (defined $snapshot_links) {
4598                         print " | " . $snapshot_links;
4599                 }
4600                 print "</td>\n" .
4601                       "</tr>\n";
4602         }
4603         if (defined $extra) {
4604                 print "<tr>\n" .
4605                       "<td colspan=\"4\">$extra</td>\n" .
4606                       "</tr>\n";
4607         }
4608         print "</table>\n";
4609 }
4610
4611 sub git_history_body {
4612         # Warning: assumes constant type (blob or tree) during history
4613         my ($commitlist, $from, $to, $refs, $extra,
4614             $file_name, $file_hash, $ftype) = @_;
4615
4616         $from = 0 unless defined $from;
4617         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4618
4619         print "<table class=\"history\">\n";
4620         my $alternate = 1;
4621         for (my $i = $from; $i <= $to; $i++) {
4622                 my %co = %{$commitlist->[$i]};
4623                 if (!%co) {
4624                         next;
4625                 }
4626                 my $commit = $co{'id'};
4627
4628                 my $ref = format_ref_marker($refs, $commit);
4629
4630                 if ($alternate) {
4631                         print "<tr class=\"dark\">\n";
4632                 } else {
4633                         print "<tr class=\"light\">\n";
4634                 }
4635                 $alternate ^= 1;
4636                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4637         # shortlog:   format_author_html('td', \%co, 10)
4638                       format_author_html('td', \%co, 15, 3) . "<td>";
4639                 # originally git_history used chop_str($co{'title'}, 50)
4640                 print format_subject_html($co{'title'}, $co{'title_short'},
4641                                           href(action=>"commit", hash=>$commit), $ref);
4642                 print "</td>\n" .
4643                       "<td class=\"link\">" .
4644                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4645                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4646
4647                 if ($ftype eq 'blob') {
4648                         my $blob_current = $file_hash;
4649                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4650                         if (defined $blob_current && defined $blob_parent &&
4651                                         $blob_current ne $blob_parent) {
4652                                 print " | " .
4653                                         $cgi->a({-href => href(action=>"blobdiff",
4654                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4655                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4656                                                                file_name=>$file_name)},
4657                                                 "diff to current");
4658                         }
4659                 }
4660                 print "</td>\n" .
4661                       "</tr>\n";
4662         }
4663         if (defined $extra) {
4664                 print "<tr>\n" .
4665                       "<td colspan=\"4\">$extra</td>\n" .
4666                       "</tr>\n";
4667         }
4668         print "</table>\n";
4669 }
4670
4671 sub git_tags_body {
4672         # uses global variable $project
4673         my ($taglist, $from, $to, $extra) = @_;
4674         $from = 0 unless defined $from;
4675         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4676
4677         print "<table class=\"tags\">\n";
4678         my $alternate = 1;
4679         for (my $i = $from; $i <= $to; $i++) {
4680                 my $entry = $taglist->[$i];
4681                 my %tag = %$entry;
4682                 my $comment = $tag{'subject'};
4683                 my $comment_short;
4684                 if (defined $comment) {
4685                         $comment_short = chop_str($comment, 30, 5);
4686                 }
4687                 if ($alternate) {
4688                         print "<tr class=\"dark\">\n";
4689                 } else {
4690                         print "<tr class=\"light\">\n";
4691                 }
4692                 $alternate ^= 1;
4693                 if (defined $tag{'age'}) {
4694                         print "<td><i>$tag{'age'}</i></td>\n";
4695                 } else {
4696                         print "<td></td>\n";
4697                 }
4698                 print "<td>" .
4699                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4700                                -class => "list name"}, esc_html($tag{'name'})) .
4701                       "</td>\n" .
4702                       "<td>";
4703                 if (defined $comment) {
4704                         print format_subject_html($comment, $comment_short,
4705                                                   href(action=>"tag", hash=>$tag{'id'}));
4706                 }
4707                 print "</td>\n" .
4708                       "<td class=\"selflink\">";
4709                 if ($tag{'type'} eq "tag") {
4710                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4711                 } else {
4712                         print "&nbsp;";
4713                 }
4714                 print "</td>\n" .
4715                       "<td class=\"link\">" . " | " .
4716                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4717                 if ($tag{'reftype'} eq "commit") {
4718                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4719                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4720                 } elsif ($tag{'reftype'} eq "blob") {
4721                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4722                 }
4723                 print "</td>\n" .
4724                       "</tr>";
4725         }
4726         if (defined $extra) {
4727                 print "<tr>\n" .
4728                       "<td colspan=\"5\">$extra</td>\n" .
4729                       "</tr>\n";
4730         }
4731         print "</table>\n";
4732 }
4733
4734 sub git_heads_body {
4735         # uses global variable $project
4736         my ($headlist, $head, $from, $to, $extra) = @_;
4737         $from = 0 unless defined $from;
4738         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4739
4740         print "<table class=\"heads\">\n";
4741         my $alternate = 1;
4742         for (my $i = $from; $i <= $to; $i++) {
4743                 my $entry = $headlist->[$i];
4744                 my %ref = %$entry;
4745                 my $curr = $ref{'id'} eq $head;
4746                 if ($alternate) {
4747                         print "<tr class=\"dark\">\n";
4748                 } else {
4749                         print "<tr class=\"light\">\n";
4750                 }
4751                 $alternate ^= 1;
4752                 print "<td><i>$ref{'age'}</i></td>\n" .
4753                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4754                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4755                                -class => "list name"},esc_html($ref{'name'})) .
4756                       "</td>\n" .
4757                       "<td class=\"link\">" .
4758                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4759                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4760                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4761                       "</td>\n" .
4762                       "</tr>";
4763         }
4764         if (defined $extra) {
4765                 print "<tr>\n" .
4766                       "<td colspan=\"3\">$extra</td>\n" .
4767                       "</tr>\n";
4768         }
4769         print "</table>\n";
4770 }
4771
4772 sub git_search_grep_body {
4773         my ($commitlist, $from, $to, $extra) = @_;
4774         $from = 0 unless defined $from;
4775         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4776
4777         print "<table class=\"commit_search\">\n";
4778         my $alternate = 1;
4779         for (my $i = $from; $i <= $to; $i++) {
4780                 my %co = %{$commitlist->[$i]};
4781                 if (!%co) {
4782                         next;
4783                 }
4784                 my $commit = $co{'id'};
4785                 if ($alternate) {
4786                         print "<tr class=\"dark\">\n";
4787                 } else {
4788                         print "<tr class=\"light\">\n";
4789                 }
4790                 $alternate ^= 1;
4791                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4792                       format_author_html('td', \%co, 15, 5) .
4793                       "<td>" .
4794                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4795                                -class => "list subject"},
4796                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4797                 my $comment = $co{'comment'};
4798                 foreach my $line (@$comment) {
4799                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4800                                 my ($lead, $match, $trail) = ($1, $2, $3);
4801                                 $match = chop_str($match, 70, 5, 'center');
4802                                 my $contextlen = int((80 - length($match))/2);
4803                                 $contextlen = 30 if ($contextlen > 30);
4804                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4805                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4806
4807                                 $lead  = esc_html($lead);
4808                                 $match = esc_html($match);
4809                                 $trail = esc_html($trail);
4810
4811                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4812                         }
4813                 }
4814                 print "</td>\n" .
4815                       "<td class=\"link\">" .
4816                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4817                       " | " .
4818                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4819                       " | " .
4820                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4821                 print "</td>\n" .
4822                       "</tr>\n";
4823         }
4824         if (defined $extra) {
4825                 print "<tr>\n" .
4826                       "<td colspan=\"3\">$extra</td>\n" .
4827                       "</tr>\n";
4828         }
4829         print "</table>\n";
4830 }
4831
4832 ## ======================================================================
4833 ## ======================================================================
4834 ## actions
4835
4836 sub git_project_list {
4837         my $order = $input_params{'order'};
4838         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4839                 die_error(400, "Unknown order parameter");
4840         }
4841
4842         my @list = git_get_projects_list();
4843         if (!@list) {
4844                 die_error(404, "No projects found");
4845         }
4846
4847         git_header_html();
4848         if (defined $home_text && -f $home_text) {
4849                 print "<div class=\"index_include\">\n";
4850                 insert_file($home_text);
4851                 print "</div>\n";
4852         }
4853         print $cgi->startform(-method => "get") .
4854               "<p class=\"projsearch\">Search:\n" .
4855               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4856               "</p>" .
4857               $cgi->end_form() . "\n";
4858         git_project_list_body(\@list, $order);
4859         git_footer_html();
4860 }
4861
4862 sub git_forks {
4863         my $order = $input_params{'order'};
4864         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4865                 die_error(400, "Unknown order parameter");
4866         }
4867
4868         my @list = git_get_projects_list($project);
4869         if (!@list) {
4870                 die_error(404, "No forks found");
4871         }
4872
4873         git_header_html();
4874         git_print_page_nav('','');
4875         git_print_header_div('summary', "$project forks");
4876         git_project_list_body(\@list, $order);
4877         git_footer_html();
4878 }
4879
4880 sub git_project_index {
4881         my @projects = git_get_projects_list($project);
4882
4883         print $cgi->header(
4884                 -type => 'text/plain',
4885                 -charset => 'utf-8',
4886                 -content_disposition => 'inline; filename="index.aux"');
4887
4888         foreach my $pr (@projects) {
4889                 if (!exists $pr->{'owner'}) {
4890                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4891                 }
4892
4893                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4894                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4895                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4896                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4897                 $path  =~ s/ /\+/g;
4898                 $owner =~ s/ /\+/g;
4899
4900                 print "$path $owner\n";
4901         }
4902 }
4903
4904 sub git_summary {
4905         my $descr = git_get_project_description($project) || "none";
4906         my %co = parse_commit("HEAD");
4907         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4908         my $head = $co{'id'};
4909
4910         my $owner = git_get_project_owner($project);
4911
4912         my $refs = git_get_references();
4913         # These get_*_list functions return one more to allow us to see if
4914         # there are more ...
4915         my @taglist  = git_get_tags_list(16);
4916         my @headlist = git_get_heads_list(16);
4917         my @forklist;
4918         my $check_forks = gitweb_check_feature('forks');
4919
4920         if ($check_forks) {
4921                 @forklist = git_get_projects_list($project);
4922         }
4923
4924         git_header_html();
4925         git_print_page_nav('summary','', $head);
4926
4927         print "<div class=\"title\">&nbsp;</div>\n";
4928         print "<table class=\"projects_list\">\n" .
4929               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4930               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4931         if (defined $cd{'rfc2822'}) {
4932                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4933         }
4934
4935         # use per project git URL list in $projectroot/$project/cloneurl
4936         # or make project git URL from git base URL and project name
4937         my $url_tag = "URL";
4938         my @url_list = git_get_project_url_list($project);
4939         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4940         foreach my $git_url (@url_list) {
4941                 next unless $git_url;
4942                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4943                 $url_tag = "";
4944         }
4945
4946         # Tag cloud
4947         my $show_ctags = gitweb_check_feature('ctags');
4948         if ($show_ctags) {
4949                 my $ctags = git_get_project_ctags($project);
4950                 my $cloud = git_populate_project_tagcloud($ctags);
4951                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4952                 print "</td>\n<td>" unless %$ctags;
4953                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4954                 print "</td>\n<td>" if %$ctags;
4955                 print git_show_project_tagcloud($cloud, 48);
4956                 print "</td></tr>";
4957         }
4958
4959         print "</table>\n";
4960
4961         # If XSS prevention is on, we don't include README.html.
4962         # TODO: Allow a readme in some safe format.
4963         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4964                 print "<div class=\"title\">readme</div>\n" .
4965                       "<div class=\"readme\">\n";
4966                 insert_file("$projectroot/$project/README.html");
4967                 print "\n</div>\n"; # class="readme"
4968         }
4969
4970         # we need to request one more than 16 (0..15) to check if
4971         # those 16 are all
4972         my @commitlist = $head ? parse_commits($head, 17) : ();
4973         if (@commitlist) {
4974                 git_print_header_div('shortlog');
4975                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4976                                   $#commitlist <=  15 ? undef :
4977                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4978         }
4979
4980         if (@taglist) {
4981                 git_print_header_div('tags');
4982                 git_tags_body(\@taglist, 0, 15,
4983                               $#taglist <=  15 ? undef :
4984                               $cgi->a({-href => href(action=>"tags")}, "..."));
4985         }
4986
4987         if (@headlist) {
4988                 git_print_header_div('heads');
4989                 git_heads_body(\@headlist, $head, 0, 15,
4990                                $#headlist <= 15 ? undef :
4991                                $cgi->a({-href => href(action=>"heads")}, "..."));
4992         }
4993
4994         if (@forklist) {
4995                 git_print_header_div('forks');
4996                 git_project_list_body(\@forklist, 'age', 0, 15,
4997                                       $#forklist <= 15 ? undef :
4998                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4999                                       'no_header');
5000         }
5001
5002         git_footer_html();
5003 }
5004
5005 sub git_tag {
5006         my $head = git_get_head_hash($project);
5007         git_header_html();
5008         git_print_page_nav('','', $head,undef,$head);
5009         my %tag = parse_tag($hash);
5010
5011         if (! %tag) {
5012                 die_error(404, "Unknown tag object");
5013         }
5014
5015         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5016         print "<div class=\"title_text\">\n" .
5017               "<table class=\"object_header\">\n" .
5018               "<tr>\n" .
5019               "<td>object</td>\n" .
5020               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5021                                $tag{'object'}) . "</td>\n" .
5022               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5023                                               $tag{'type'}) . "</td>\n" .
5024               "</tr>\n";
5025         if (defined($tag{'author'})) {
5026                 git_print_authorship_rows(\%tag, 'author');
5027         }
5028         print "</table>\n\n" .
5029               "</div>\n";
5030         print "<div class=\"page_body\">";
5031         my $comment = $tag{'comment'};
5032         foreach my $line (@$comment) {
5033                 chomp $line;
5034                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5035         }
5036         print "</div>\n";
5037         git_footer_html();
5038 }
5039
5040 sub git_blame_common {
5041         my $format = shift || 'porcelain';
5042         if ($format eq 'porcelain' && $cgi->param('js')) {
5043                 $format = 'incremental';
5044                 $action = 'blame_incremental'; # for page title etc
5045         }
5046
5047         # permissions
5048         gitweb_check_feature('blame')
5049                 or die_error(403, "Blame view not allowed");
5050
5051         # error checking
5052         die_error(400, "No file name given") unless $file_name;
5053         $hash_base ||= git_get_head_hash($project);
5054         die_error(404, "Couldn't find base commit") unless $hash_base;
5055         my %co = parse_commit($hash_base)
5056                 or die_error(404, "Commit not found");
5057         my $ftype = "blob";
5058         if (!defined $hash) {
5059                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5060                         or die_error(404, "Error looking up file");
5061         } else {
5062                 $ftype = git_get_type($hash);
5063                 if ($ftype !~ "blob") {
5064                         die_error(400, "Object is not a blob");
5065                 }
5066         }
5067
5068         my $fd;
5069         if ($format eq 'incremental') {
5070                 # get file contents (as base)
5071                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5072                         or die_error(500, "Open git-cat-file failed");
5073         } elsif ($format eq 'data') {
5074                 # run git-blame --incremental
5075                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5076                         $hash_base, "--", $file_name
5077                         or die_error(500, "Open git-blame --incremental failed");
5078         } else {
5079                 # run git-blame --porcelain
5080                 open $fd, "-|", git_cmd(), "blame", '-p',
5081                         $hash_base, '--', $file_name
5082                         or die_error(500, "Open git-blame --porcelain failed");
5083         }
5084
5085         # incremental blame data returns early
5086         if ($format eq 'data') {
5087                 print $cgi->header(
5088                         -type=>"text/plain", -charset => "utf-8",
5089                         -status=> "200 OK");
5090                 local $| = 1; # output autoflush
5091                 print while <$fd>;
5092                 close $fd
5093                         or print "ERROR $!\n";
5094
5095                 print 'END';
5096                 if (defined $t0 && gitweb_check_feature('timed')) {
5097                         print ' '.
5098                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5099                               ' '.$number_of_git_cmds;
5100                 }
5101                 print "\n";
5102
5103                 return;
5104         }
5105
5106         # page header
5107         git_header_html();
5108         my $formats_nav =
5109                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5110                         "blob") .
5111                 " | ";
5112         if ($format eq 'incremental') {
5113                 $formats_nav .=
5114                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5115                                 "blame") . " (non-incremental)";
5116         } else {
5117                 $formats_nav .=
5118                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5119                                 "blame") . " (incremental)";
5120         }
5121         $formats_nav .=
5122                 " | " .
5123                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5124                         "history") .
5125                 " | " .
5126                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5127                         "HEAD");
5128         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5129         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5130         git_print_page_path($file_name, $ftype, $hash_base);
5131
5132         # page body
5133         if ($format eq 'incremental') {
5134                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5135                       "This page requires JavaScript to run.\n Use ".
5136                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5137                               'this page').
5138                       " instead.\n".
5139                       "</b></center></div>\n</noscript>\n";
5140
5141                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5142         }
5143
5144         print qq!<div class="page_body">\n!;
5145         print qq!<div id="progress_info">... / ...</div>\n!
5146                 if ($format eq 'incremental');
5147         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5148               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5149               qq!<thead>\n!.
5150               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5151               qq!</thead>\n!.
5152               qq!<tbody>\n!;
5153
5154         my @rev_color = qw(light dark);
5155         my $num_colors = scalar(@rev_color);
5156         my $current_color = 0;
5157
5158         if ($format eq 'incremental') {
5159                 my $color_class = $rev_color[$current_color];
5160
5161                 #contents of a file
5162                 my $linenr = 0;
5163         LINE:
5164                 while (my $line = <$fd>) {
5165                         chomp $line;
5166                         $linenr++;
5167
5168                         print qq!<tr id="l$linenr" class="$color_class">!.
5169                               qq!<td class="sha1"><a href=""> </a></td>!.
5170                               qq!<td class="linenr">!.
5171                               qq!<a class="linenr" href="">$linenr</a></td>!;
5172                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5173                         print qq!</tr>\n!;
5174                 }
5175
5176         } else { # porcelain, i.e. ordinary blame
5177                 my %metainfo = (); # saves information about commits
5178
5179                 # blame data
5180         LINE:
5181                 while (my $line = <$fd>) {
5182                         chomp $line;
5183                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5184                         # no <lines in group> for subsequent lines in group of lines
5185                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5186                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5187                         if (!exists $metainfo{$full_rev}) {
5188                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5189                         }
5190                         my $meta = $metainfo{$full_rev};
5191                         my $data;
5192                         while ($data = <$fd>) {
5193                                 chomp $data;
5194                                 last if ($data =~ s/^\t//); # contents of line
5195                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5196                                         $meta->{$1} = $2 unless exists $meta->{$1};
5197                                 }
5198                                 if ($data =~ /^previous /) {
5199                                         $meta->{'nprevious'}++;
5200                                 }
5201                         }
5202                         my $short_rev = substr($full_rev, 0, 8);
5203                         my $author = $meta->{'author'};
5204                         my %date =
5205                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5206                         my $date = $date{'iso-tz'};
5207                         if ($group_size) {
5208                                 $current_color = ($current_color + 1) % $num_colors;
5209                         }
5210                         my $tr_class = $rev_color[$current_color];
5211                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5212                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5213                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5214                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5215                         if ($group_size) {
5216                                 print "<td class=\"sha1\"";
5217                                 print " title=\"". esc_html($author) . ", $date\"";
5218                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5219                                 print ">";
5220                                 print $cgi->a({-href => href(action=>"commit",
5221                                                              hash=>$full_rev,
5222                                                              file_name=>$file_name)},
5223                                               esc_html($short_rev));
5224                                 if ($group_size >= 2) {
5225                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5226                                         if (@author_initials) {
5227                                                 print "<br />" .
5228                                                       esc_html(join('', @author_initials));
5229                                                 #           or join('.', ...)
5230                                         }
5231                                 }
5232                                 print "</td>\n";
5233                         }
5234                         # 'previous' <sha1 of parent commit> <filename at commit>
5235                         if (exists $meta->{'previous'} &&
5236                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5237                                 $meta->{'parent'} = $1;
5238                                 $meta->{'file_parent'} = unquote($2);
5239                         }
5240                         my $linenr_commit =
5241                                 exists($meta->{'parent'}) ?
5242                                 $meta->{'parent'} : $full_rev;
5243                         my $linenr_filename =
5244                                 exists($meta->{'file_parent'}) ?
5245                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5246                         my $blamed = href(action => 'blame',
5247                                           file_name => $linenr_filename,
5248                                           hash_base => $linenr_commit);
5249                         print "<td class=\"linenr\">";
5250                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5251                                         -class => "linenr" },
5252                                       esc_html($lineno));
5253                         print "</td>";
5254                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5255                         print "</tr>\n";
5256                 } # end while
5257
5258         }
5259
5260         # footer
5261         print "</tbody>\n".
5262               "</table>\n"; # class="blame"
5263         print "</div>\n";   # class="blame_body"
5264         close $fd
5265                 or print "Reading blob failed\n";
5266
5267         git_footer_html();
5268 }
5269
5270 sub git_blame {
5271         git_blame_common();
5272 }
5273
5274 sub git_blame_incremental {
5275         git_blame_common('incremental');
5276 }
5277
5278 sub git_blame_data {
5279         git_blame_common('data');
5280 }
5281
5282 sub git_tags {
5283         my $head = git_get_head_hash($project);
5284         git_header_html();
5285         git_print_page_nav('','', $head,undef,$head);
5286         git_print_header_div('summary', $project);
5287
5288         my @tagslist = git_get_tags_list();
5289         if (@tagslist) {
5290                 git_tags_body(\@tagslist);
5291         }
5292         git_footer_html();
5293 }
5294
5295 sub git_heads {
5296         my $head = git_get_head_hash($project);
5297         git_header_html();
5298         git_print_page_nav('','', $head,undef,$head);
5299         git_print_header_div('summary', $project);
5300
5301         my @headslist = git_get_heads_list();
5302         if (@headslist) {
5303                 git_heads_body(\@headslist, $head);
5304         }
5305         git_footer_html();
5306 }
5307
5308 sub git_blob_plain {
5309         my $type = shift;
5310         my $expires;
5311
5312         if (!defined $hash) {
5313                 if (defined $file_name) {
5314                         my $base = $hash_base || git_get_head_hash($project);
5315                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5316                                 or die_error(404, "Cannot find file");
5317                 } else {
5318                         die_error(400, "No file name defined");
5319                 }
5320         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5321                 # blobs defined by non-textual hash id's can be cached
5322                 $expires = "+1d";
5323         }
5324
5325         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5326                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5327
5328         # content-type (can include charset)
5329         $type = blob_contenttype($fd, $file_name, $type);
5330
5331         # "save as" filename, even when no $file_name is given
5332         my $save_as = "$hash";
5333         if (defined $file_name) {
5334                 $save_as = $file_name;
5335         } elsif ($type =~ m/^text\//) {
5336                 $save_as .= '.txt';
5337         }
5338
5339         # With XSS prevention on, blobs of all types except a few known safe
5340         # ones are served with "Content-Disposition: attachment" to make sure
5341         # they don't run in our security domain.  For certain image types,
5342         # blob view writes an <img> tag referring to blob_plain view, and we
5343         # want to be sure not to break that by serving the image as an
5344         # attachment (though Firefox 3 doesn't seem to care).
5345         my $sandbox = $prevent_xss &&
5346                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5347
5348         print $cgi->header(
5349                 -type => $type,
5350                 -expires => $expires,
5351                 -content_disposition =>
5352                         ($sandbox ? 'attachment' : 'inline')
5353                         . '; filename="' . $save_as . '"');
5354         local $/ = undef;
5355         binmode STDOUT, ':raw';
5356         print <$fd>;
5357         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5358         close $fd;
5359 }
5360
5361 sub git_blob {
5362         my $expires;
5363
5364         if (!defined $hash) {
5365                 if (defined $file_name) {
5366                         my $base = $hash_base || git_get_head_hash($project);
5367                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5368                                 or die_error(404, "Cannot find file");
5369                 } else {
5370                         die_error(400, "No file name defined");
5371                 }
5372         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5373                 # blobs defined by non-textual hash id's can be cached
5374                 $expires = "+1d";
5375         }
5376
5377         my $have_blame = gitweb_check_feature('blame');
5378         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5379                 or die_error(500, "Couldn't cat $file_name, $hash");
5380         my $mimetype = blob_mimetype($fd, $file_name);
5381         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5382                 close $fd;
5383                 return git_blob_plain($mimetype);
5384         }
5385         # we can have blame only for text/* mimetype
5386         $have_blame &&= ($mimetype =~ m!^text/!);
5387
5388         git_header_html(undef, $expires);
5389         my $formats_nav = '';
5390         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5391                 if (defined $file_name) {
5392                         if ($have_blame) {
5393                                 $formats_nav .=
5394                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5395                                                 "blame") .
5396                                         " | ";
5397                         }
5398                         $formats_nav .=
5399                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5400                                         "history") .
5401                                 " | " .
5402                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5403                                         "raw") .
5404                                 " | " .
5405                                 $cgi->a({-href => href(action=>"blob",
5406                                                        hash_base=>"HEAD", file_name=>$file_name)},
5407                                         "HEAD");
5408                 } else {
5409                         $formats_nav .=
5410                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5411                                         "raw");
5412                 }
5413                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5414                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5415         } else {
5416                 print "<div class=\"page_nav\">\n" .
5417                       "<br/><br/></div>\n" .
5418                       "<div class=\"title\">$hash</div>\n";
5419         }
5420         git_print_page_path($file_name, "blob", $hash_base);
5421         print "<div class=\"page_body\">\n";
5422         if ($mimetype =~ m!^image/!) {
5423                 print qq!<img type="$mimetype"!;
5424                 if ($file_name) {
5425                         print qq! alt="$file_name" title="$file_name"!;
5426                 }
5427                 print qq! src="! .
5428                       href(action=>"blob_plain", hash=>$hash,
5429                            hash_base=>$hash_base, file_name=>$file_name) .
5430                       qq!" />\n!;
5431         } else {
5432                 my $nr;
5433                 while (my $line = <$fd>) {
5434                         chomp $line;
5435                         $nr++;
5436                         $line = untabify($line);
5437                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5438                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5439                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5440                 }
5441         }
5442         close $fd
5443                 or print "Reading blob failed.\n";
5444         print "</div>";
5445         git_footer_html();
5446 }
5447
5448 sub git_tree {
5449         if (!defined $hash_base) {
5450                 $hash_base = "HEAD";
5451         }
5452         if (!defined $hash) {
5453                 if (defined $file_name) {
5454                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5455                 } else {
5456                         $hash = $hash_base;
5457                 }
5458         }
5459         die_error(404, "No such tree") unless defined($hash);
5460
5461         my $show_sizes = gitweb_check_feature('show-sizes');
5462         my $have_blame = gitweb_check_feature('blame');
5463
5464         my @entries = ();
5465         {
5466                 local $/ = "\0";
5467                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5468                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5469                         or die_error(500, "Open git-ls-tree failed");
5470                 @entries = map { chomp; $_ } <$fd>;
5471                 close $fd
5472                         or die_error(404, "Reading tree failed");
5473         }
5474
5475         my $refs = git_get_references();
5476         my $ref = format_ref_marker($refs, $hash_base);
5477         git_header_html();
5478         my $basedir = '';
5479         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5480                 my @views_nav = ();
5481                 if (defined $file_name) {
5482                         push @views_nav,
5483                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5484                                         "history"),
5485                                 $cgi->a({-href => href(action=>"tree",
5486                                                        hash_base=>"HEAD", file_name=>$file_name)},
5487                                         "HEAD"),
5488                 }
5489                 my $snapshot_links = format_snapshot_links($hash);
5490                 if (defined $snapshot_links) {
5491                         # FIXME: Should be available when we have no hash base as well.
5492                         push @views_nav, $snapshot_links;
5493                 }
5494                 git_print_page_nav('tree','', $hash_base, undef, undef,
5495                                    join(' | ', @views_nav));
5496                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5497         } else {
5498                 undef $hash_base;
5499                 print "<div class=\"page_nav\">\n";
5500                 print "<br/><br/></div>\n";
5501                 print "<div class=\"title\">$hash</div>\n";
5502         }
5503         if (defined $file_name) {
5504                 $basedir = $file_name;
5505                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5506                         $basedir .= '/';
5507                 }
5508                 git_print_page_path($file_name, 'tree', $hash_base);
5509         }
5510         print "<div class=\"page_body\">\n";
5511         print "<table class=\"tree\">\n";
5512         my $alternate = 1;
5513         # '..' (top directory) link if possible
5514         if (defined $hash_base &&
5515             defined $file_name && $file_name =~ m![^/]+$!) {
5516                 if ($alternate) {
5517                         print "<tr class=\"dark\">\n";
5518                 } else {
5519                         print "<tr class=\"light\">\n";
5520                 }
5521                 $alternate ^= 1;
5522
5523                 my $up = $file_name;
5524                 $up =~ s!/?[^/]+$!!;
5525                 undef $up unless $up;
5526                 # based on git_print_tree_entry
5527                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5528                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5529                 print '<td class="list">';
5530                 print $cgi->a({-href => href(action=>"tree",
5531                                              hash_base=>$hash_base,
5532                                              file_name=>$up)},
5533                               "..");
5534                 print "</td>\n";
5535                 print "<td class=\"link\"></td>\n";
5536
5537                 print "</tr>\n";
5538         }
5539         foreach my $line (@entries) {
5540                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5541
5542                 if ($alternate) {
5543                         print "<tr class=\"dark\">\n";
5544                 } else {
5545                         print "<tr class=\"light\">\n";
5546                 }
5547                 $alternate ^= 1;
5548
5549                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5550
5551                 print "</tr>\n";
5552         }
5553         print "</table>\n" .
5554               "</div>";
5555         git_footer_html();
5556 }
5557
5558 sub snapshot_name {
5559         my ($project, $hash) = @_;
5560
5561         # path/to/project.git  -> project
5562         # path/to/project/.git -> project
5563         my $name = to_utf8($project);
5564         $name =~ s,([^/])/*\.git$,$1,;
5565         $name = basename($name);
5566         # sanitize name
5567         $name =~ s/[[:cntrl:]]/?/g;
5568
5569         my $ver = $hash;
5570         if ($hash =~ /^[0-9a-fA-F]+$/) {
5571                 # shorten SHA-1 hash
5572                 my $full_hash = git_get_full_hash($project, $hash);
5573                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5574                         $ver = git_get_short_hash($project, $hash);
5575                 }
5576         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5577                 # tags don't need shortened SHA-1 hash
5578                 $ver = $1;
5579         } else {
5580                 # branches and other need shortened SHA-1 hash
5581                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5582                         $ver = $1;
5583                 }
5584                 $ver .= '-' . git_get_short_hash($project, $hash);
5585         }
5586         # in case of hierarchical branch names
5587         $ver =~ s!/!.!g;
5588
5589         # name = project-version_string
5590         $name = "$name-$ver";
5591
5592         return wantarray ? ($name, $name) : $name;
5593 }
5594
5595 sub git_snapshot {
5596         my $format = $input_params{'snapshot_format'};
5597         if (!@snapshot_fmts) {
5598                 die_error(403, "Snapshots not allowed");
5599         }
5600         # default to first supported snapshot format
5601         $format ||= $snapshot_fmts[0];
5602         if ($format !~ m/^[a-z0-9]+$/) {
5603                 die_error(400, "Invalid snapshot format parameter");
5604         } elsif (!exists($known_snapshot_formats{$format})) {
5605                 die_error(400, "Unknown snapshot format");
5606         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5607                 die_error(403, "Snapshot format not allowed");
5608         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5609                 die_error(403, "Unsupported snapshot format");
5610         }
5611
5612         my $type = git_get_type("$hash^{}");
5613         if (!$type) {
5614                 die_error(404, 'Object does not exist');
5615         }  elsif ($type eq 'blob') {
5616                 die_error(400, 'Object is not a tree-ish');
5617         }
5618
5619         my ($name, $prefix) = snapshot_name($project, $hash);
5620         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5621         my $cmd = quote_command(
5622                 git_cmd(), 'archive',
5623                 "--format=$known_snapshot_formats{$format}{'format'}",
5624                 "--prefix=$prefix/", $hash);
5625         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5626                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5627         }
5628
5629         $filename =~ s/(["\\])/\\$1/g;
5630         print $cgi->header(
5631                 -type => $known_snapshot_formats{$format}{'type'},
5632                 -content_disposition => 'inline; filename="' . $filename . '"',
5633                 -status => '200 OK');
5634
5635         open my $fd, "-|", $cmd
5636                 or die_error(500, "Execute git-archive failed");
5637         binmode STDOUT, ':raw';
5638         print <$fd>;
5639         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5640         close $fd;
5641 }
5642
5643 sub git_log_generic {
5644         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5645
5646         my $head = git_get_head_hash($project);
5647         if (!defined $base) {
5648                 $base = $head;
5649         }
5650         if (!defined $page) {
5651                 $page = 0;
5652         }
5653         my $refs = git_get_references();
5654
5655         my $commit_hash = $base;
5656         if (defined $parent) {
5657                 $commit_hash = "$parent..$base";
5658         }
5659         my @commitlist =
5660                 parse_commits($commit_hash, 101, (100 * $page),
5661                               defined $file_name ? ($file_name, "--full-history") : ());
5662
5663         my $ftype;
5664         if (!defined $file_hash && defined $file_name) {
5665                 # some commits could have deleted file in question,
5666                 # and not have it in tree, but one of them has to have it
5667                 for (my $i = 0; $i < @commitlist; $i++) {
5668                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5669                         last if defined $file_hash;
5670                 }
5671         }
5672         if (defined $file_hash) {
5673                 $ftype = git_get_type($file_hash);
5674         }
5675         if (defined $file_name && !defined $ftype) {
5676                 die_error(500, "Unknown type of object");
5677         }
5678         my %co;
5679         if (defined $file_name) {
5680                 %co = parse_commit($base)
5681                         or die_error(404, "Unknown commit object");
5682         }
5683
5684
5685         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5686         my $next_link = '';
5687         if ($#commitlist >= 100) {
5688                 $next_link =
5689                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5690                                  -accesskey => "n", -title => "Alt-n"}, "next");
5691         }
5692         my $patch_max = gitweb_get_feature('patches');
5693         if ($patch_max && !defined $file_name) {
5694                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5695                         $paging_nav .= " &sdot; " .
5696                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5697                                         "patches");
5698                 }
5699         }
5700
5701         git_header_html();
5702         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5703         if (defined $file_name) {
5704                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5705         } else {
5706                 git_print_header_div('summary', $project)
5707         }
5708         git_print_page_path($file_name, $ftype, $hash_base)
5709                 if (defined $file_name);
5710
5711         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5712                      $file_name, $file_hash, $ftype);
5713
5714         git_footer_html();
5715 }
5716
5717 sub git_log {
5718         git_log_generic('log', \&git_log_body,
5719                         $hash, $hash_parent);
5720 }
5721
5722 sub git_commit {
5723         $hash ||= $hash_base || "HEAD";
5724         my %co = parse_commit($hash)
5725             or die_error(404, "Unknown commit object");
5726
5727         my $parent  = $co{'parent'};
5728         my $parents = $co{'parents'}; # listref
5729
5730         # we need to prepare $formats_nav before any parameter munging
5731         my $formats_nav;
5732         if (!defined $parent) {
5733                 # --root commitdiff
5734                 $formats_nav .= '(initial)';
5735         } elsif (@$parents == 1) {
5736                 # single parent commit
5737                 $formats_nav .=
5738                         '(parent: ' .
5739                         $cgi->a({-href => href(action=>"commit",
5740                                                hash=>$parent)},
5741                                 esc_html(substr($parent, 0, 7))) .
5742                         ')';
5743         } else {
5744                 # merge commit
5745                 $formats_nav .=
5746                         '(merge: ' .
5747                         join(' ', map {
5748                                 $cgi->a({-href => href(action=>"commit",
5749                                                        hash=>$_)},
5750                                         esc_html(substr($_, 0, 7)));
5751                         } @$parents ) .
5752                         ')';
5753         }
5754         if (gitweb_check_feature('patches') && @$parents <= 1) {
5755                 $formats_nav .= " | " .
5756                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5757                                 "patch");
5758         }
5759
5760         if (!defined $parent) {
5761                 $parent = "--root";
5762         }
5763         my @difftree;
5764         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5765                 @diff_opts,
5766                 (@$parents <= 1 ? $parent : '-c'),
5767                 $hash, "--"
5768                 or die_error(500, "Open git-diff-tree failed");
5769         @difftree = map { chomp; $_ } <$fd>;
5770         close $fd or die_error(404, "Reading git-diff-tree failed");
5771
5772         # non-textual hash id's can be cached
5773         my $expires;
5774         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5775                 $expires = "+1d";
5776         }
5777         my $refs = git_get_references();
5778         my $ref = format_ref_marker($refs, $co{'id'});
5779
5780         git_header_html(undef, $expires);
5781         git_print_page_nav('commit', '',
5782                            $hash, $co{'tree'}, $hash,
5783                            $formats_nav);
5784
5785         if (defined $co{'parent'}) {
5786                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5787         } else {
5788                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5789         }
5790         print "<div class=\"title_text\">\n" .
5791               "<table class=\"object_header\">\n";
5792         git_print_authorship_rows(\%co);
5793         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5794         print "<tr>" .
5795               "<td>tree</td>" .
5796               "<td class=\"sha1\">" .
5797               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5798                        class => "list"}, $co{'tree'}) .
5799               "</td>" .
5800               "<td class=\"link\">" .
5801               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5802                       "tree");
5803         my $snapshot_links = format_snapshot_links($hash);
5804         if (defined $snapshot_links) {
5805                 print " | " . $snapshot_links;
5806         }
5807         print "</td>" .
5808               "</tr>\n";
5809
5810         foreach my $par (@$parents) {
5811                 print "<tr>" .
5812                       "<td>parent</td>" .
5813                       "<td class=\"sha1\">" .
5814                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5815                                class => "list"}, $par) .
5816                       "</td>" .
5817                       "<td class=\"link\">" .
5818                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5819                       " | " .
5820                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5821                       "</td>" .
5822                       "</tr>\n";
5823         }
5824         print "</table>".
5825               "</div>\n";
5826
5827         print "<div class=\"page_body\">\n";
5828         git_print_log($co{'comment'});
5829         print "</div>\n";
5830
5831         git_difftree_body(\@difftree, $hash, @$parents);
5832
5833         git_footer_html();
5834 }
5835
5836 sub git_object {
5837         # object is defined by:
5838         # - hash or hash_base alone
5839         # - hash_base and file_name
5840         my $type;
5841
5842         # - hash or hash_base alone
5843         if ($hash || ($hash_base && !defined $file_name)) {
5844                 my $object_id = $hash || $hash_base;
5845
5846                 open my $fd, "-|", quote_command(
5847                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5848                         or die_error(404, "Object does not exist");
5849                 $type = <$fd>;
5850                 chomp $type;
5851                 close $fd
5852                         or die_error(404, "Object does not exist");
5853
5854         # - hash_base and file_name
5855         } elsif ($hash_base && defined $file_name) {
5856                 $file_name =~ s,/+$,,;
5857
5858                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5859                         or die_error(404, "Base object does not exist");
5860
5861                 # here errors should not hapen
5862                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5863                         or die_error(500, "Open git-ls-tree failed");
5864                 my $line = <$fd>;
5865                 close $fd;
5866
5867                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5868                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5869                         die_error(404, "File or directory for given base does not exist");
5870                 }
5871                 $type = $2;
5872                 $hash = $3;
5873         } else {
5874                 die_error(400, "Not enough information to find object");
5875         }
5876
5877         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5878                                           hash=>$hash, hash_base=>$hash_base,
5879                                           file_name=>$file_name),
5880                              -status => '302 Found');
5881 }
5882
5883 sub git_blobdiff {
5884         my $format = shift || 'html';
5885
5886         my $fd;
5887         my @difftree;
5888         my %diffinfo;
5889         my $expires;
5890
5891         # preparing $fd and %diffinfo for git_patchset_body
5892         # new style URI
5893         if (defined $hash_base && defined $hash_parent_base) {
5894                 if (defined $file_name) {
5895                         # read raw output
5896                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5897                                 $hash_parent_base, $hash_base,
5898                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5899                                 or die_error(500, "Open git-diff-tree failed");
5900                         @difftree = map { chomp; $_ } <$fd>;
5901                         close $fd
5902                                 or die_error(404, "Reading git-diff-tree failed");
5903                         @difftree
5904                                 or die_error(404, "Blob diff not found");
5905
5906                 } elsif (defined $hash &&
5907                          $hash =~ /[0-9a-fA-F]{40}/) {
5908                         # try to find filename from $hash
5909
5910                         # read filtered raw output
5911                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5912                                 $hash_parent_base, $hash_base, "--"
5913                                 or die_error(500, "Open git-diff-tree failed");
5914                         @difftree =
5915                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5916                                 # $hash == to_id
5917                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5918                                 map { chomp; $_ } <$fd>;
5919                         close $fd
5920                                 or die_error(404, "Reading git-diff-tree failed");
5921                         @difftree
5922                                 or die_error(404, "Blob diff not found");
5923
5924                 } else {
5925                         die_error(400, "Missing one of the blob diff parameters");
5926                 }
5927
5928                 if (@difftree > 1) {
5929                         die_error(400, "Ambiguous blob diff specification");
5930                 }
5931
5932                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5933                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5934                 $file_name   ||= $diffinfo{'to_file'};
5935
5936                 $hash_parent ||= $diffinfo{'from_id'};
5937                 $hash        ||= $diffinfo{'to_id'};
5938
5939                 # non-textual hash id's can be cached
5940                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5941                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5942                         $expires = '+1d';
5943                 }
5944
5945                 # open patch output
5946                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5947                         '-p', ($format eq 'html' ? "--full-index" : ()),
5948                         $hash_parent_base, $hash_base,
5949                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5950                         or die_error(500, "Open git-diff-tree failed");
5951         }
5952
5953         # old/legacy style URI -- not generated anymore since 1.4.3.
5954         if (!%diffinfo) {
5955                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5956         }
5957
5958         # header
5959         if ($format eq 'html') {
5960                 my $formats_nav =
5961                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5962                                 "raw");
5963                 git_header_html(undef, $expires);
5964                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5965                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5966                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5967                 } else {
5968                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5969                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5970                 }
5971                 if (defined $file_name) {
5972                         git_print_page_path($file_name, "blob", $hash_base);
5973                 } else {
5974                         print "<div class=\"page_path\"></div>\n";
5975                 }
5976
5977         } elsif ($format eq 'plain') {
5978                 print $cgi->header(
5979                         -type => 'text/plain',
5980                         -charset => 'utf-8',
5981                         -expires => $expires,
5982                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5983
5984                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5985
5986         } else {
5987                 die_error(400, "Unknown blobdiff format");
5988         }
5989
5990         # patch
5991         if ($format eq 'html') {
5992                 print "<div class=\"page_body\">\n";
5993
5994                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5995                 close $fd;
5996
5997                 print "</div>\n"; # class="page_body"
5998                 git_footer_html();
5999
6000         } else {
6001                 while (my $line = <$fd>) {
6002                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6003                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6004
6005                         print $line;
6006
6007                         last if $line =~ m!^\+\+\+!;
6008                 }
6009                 local $/ = undef;
6010                 print <$fd>;
6011                 close $fd;
6012         }
6013 }
6014
6015 sub git_blobdiff_plain {
6016         git_blobdiff('plain');
6017 }
6018
6019 sub git_commitdiff {
6020         my %params = @_;
6021         my $format = $params{-format} || 'html';
6022
6023         my ($patch_max) = gitweb_get_feature('patches');
6024         if ($format eq 'patch') {
6025                 die_error(403, "Patch view not allowed") unless $patch_max;
6026         }
6027
6028         $hash ||= $hash_base || "HEAD";
6029         my %co = parse_commit($hash)
6030             or die_error(404, "Unknown commit object");
6031
6032         # choose format for commitdiff for merge
6033         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6034                 $hash_parent = '--cc';
6035         }
6036         # we need to prepare $formats_nav before almost any parameter munging
6037         my $formats_nav;
6038         if ($format eq 'html') {
6039                 $formats_nav =
6040                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6041                                 "raw");
6042                 if ($patch_max && @{$co{'parents'}} <= 1) {
6043                         $formats_nav .= " | " .
6044                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6045                                         "patch");
6046                 }
6047
6048                 if (defined $hash_parent &&
6049                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6050                         # commitdiff with two commits given
6051                         my $hash_parent_short = $hash_parent;
6052                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6053                                 $hash_parent_short = substr($hash_parent, 0, 7);
6054                         }
6055                         $formats_nav .=
6056                                 ' (from';
6057                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6058                                 if ($co{'parents'}[$i] eq $hash_parent) {
6059                                         $formats_nav .= ' parent ' . ($i+1);
6060                                         last;
6061                                 }
6062                         }
6063                         $formats_nav .= ': ' .
6064                                 $cgi->a({-href => href(action=>"commitdiff",
6065                                                        hash=>$hash_parent)},
6066                                         esc_html($hash_parent_short)) .
6067                                 ')';
6068                 } elsif (!$co{'parent'}) {
6069                         # --root commitdiff
6070                         $formats_nav .= ' (initial)';
6071                 } elsif (scalar @{$co{'parents'}} == 1) {
6072                         # single parent commit
6073                         $formats_nav .=
6074                                 ' (parent: ' .
6075                                 $cgi->a({-href => href(action=>"commitdiff",
6076                                                        hash=>$co{'parent'})},
6077                                         esc_html(substr($co{'parent'}, 0, 7))) .
6078                                 ')';
6079                 } else {
6080                         # merge commit
6081                         if ($hash_parent eq '--cc') {
6082                                 $formats_nav .= ' | ' .
6083                                         $cgi->a({-href => href(action=>"commitdiff",
6084                                                                hash=>$hash, hash_parent=>'-c')},
6085                                                 'combined');
6086                         } else { # $hash_parent eq '-c'
6087                                 $formats_nav .= ' | ' .
6088                                         $cgi->a({-href => href(action=>"commitdiff",
6089                                                                hash=>$hash, hash_parent=>'--cc')},
6090                                                 'compact');
6091                         }
6092                         $formats_nav .=
6093                                 ' (merge: ' .
6094                                 join(' ', map {
6095                                         $cgi->a({-href => href(action=>"commitdiff",
6096                                                                hash=>$_)},
6097                                                 esc_html(substr($_, 0, 7)));
6098                                 } @{$co{'parents'}} ) .
6099                                 ')';
6100                 }
6101         }
6102
6103         my $hash_parent_param = $hash_parent;
6104         if (!defined $hash_parent_param) {
6105                 # --cc for multiple parents, --root for parentless
6106                 $hash_parent_param =
6107                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6108         }
6109
6110         # read commitdiff
6111         my $fd;
6112         my @difftree;
6113         if ($format eq 'html') {
6114                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6115                         "--no-commit-id", "--patch-with-raw", "--full-index",
6116                         $hash_parent_param, $hash, "--"
6117                         or die_error(500, "Open git-diff-tree failed");
6118
6119                 while (my $line = <$fd>) {
6120                         chomp $line;
6121                         # empty line ends raw part of diff-tree output
6122                         last unless $line;
6123                         push @difftree, scalar parse_difftree_raw_line($line);
6124                 }
6125
6126         } elsif ($format eq 'plain') {
6127                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6128                         '-p', $hash_parent_param, $hash, "--"
6129                         or die_error(500, "Open git-diff-tree failed");
6130         } elsif ($format eq 'patch') {
6131                 # For commit ranges, we limit the output to the number of
6132                 # patches specified in the 'patches' feature.
6133                 # For single commits, we limit the output to a single patch,
6134                 # diverging from the git-format-patch default.
6135                 my @commit_spec = ();
6136                 if ($hash_parent) {
6137                         if ($patch_max > 0) {
6138                                 push @commit_spec, "-$patch_max";
6139                         }
6140                         push @commit_spec, '-n', "$hash_parent..$hash";
6141                 } else {
6142                         if ($params{-single}) {
6143                                 push @commit_spec, '-1';
6144                         } else {
6145                                 if ($patch_max > 0) {
6146                                         push @commit_spec, "-$patch_max";
6147                                 }
6148                                 push @commit_spec, "-n";
6149                         }
6150                         push @commit_spec, '--root', $hash;
6151                 }
6152                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6153                         '--stdout', @commit_spec
6154                         or die_error(500, "Open git-format-patch failed");
6155         } else {
6156                 die_error(400, "Unknown commitdiff format");
6157         }
6158
6159         # non-textual hash id's can be cached
6160         my $expires;
6161         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6162                 $expires = "+1d";
6163         }
6164
6165         # write commit message
6166         if ($format eq 'html') {
6167                 my $refs = git_get_references();
6168                 my $ref = format_ref_marker($refs, $co{'id'});
6169
6170                 git_header_html(undef, $expires);
6171                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6172                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6173                 print "<div class=\"title_text\">\n" .
6174                       "<table class=\"object_header\">\n";
6175                 git_print_authorship_rows(\%co);
6176                 print "</table>".
6177                       "</div>\n";
6178                 print "<div class=\"page_body\">\n";
6179                 if (@{$co{'comment'}} > 1) {
6180                         print "<div class=\"log\">\n";
6181                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6182                         print "</div>\n"; # class="log"
6183                 }
6184
6185         } elsif ($format eq 'plain') {
6186                 my $refs = git_get_references("tags");
6187                 my $tagname = git_get_rev_name_tags($hash);
6188                 my $filename = basename($project) . "-$hash.patch";
6189
6190                 print $cgi->header(
6191                         -type => 'text/plain',
6192                         -charset => 'utf-8',
6193                         -expires => $expires,
6194                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6195                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6196                 print "From: " . to_utf8($co{'author'}) . "\n";
6197                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6198                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6199
6200                 print "X-Git-Tag: $tagname\n" if $tagname;
6201                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6202
6203                 foreach my $line (@{$co{'comment'}}) {
6204                         print to_utf8($line) . "\n";
6205                 }
6206                 print "---\n\n";
6207         } elsif ($format eq 'patch') {
6208                 my $filename = basename($project) . "-$hash.patch";
6209
6210                 print $cgi->header(
6211                         -type => 'text/plain',
6212                         -charset => 'utf-8',
6213                         -expires => $expires,
6214                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6215         }
6216
6217         # write patch
6218         if ($format eq 'html') {
6219                 my $use_parents = !defined $hash_parent ||
6220                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6221                 git_difftree_body(\@difftree, $hash,
6222                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6223                 print "<br/>\n";
6224
6225                 git_patchset_body($fd, \@difftree, $hash,
6226                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6227                 close $fd;
6228                 print "</div>\n"; # class="page_body"
6229                 git_footer_html();
6230
6231         } elsif ($format eq 'plain') {
6232                 local $/ = undef;
6233                 print <$fd>;
6234                 close $fd
6235                         or print "Reading git-diff-tree failed\n";
6236         } elsif ($format eq 'patch') {
6237                 local $/ = undef;
6238                 print <$fd>;
6239                 close $fd
6240                         or print "Reading git-format-patch failed\n";
6241         }
6242 }
6243
6244 sub git_commitdiff_plain {
6245         git_commitdiff(-format => 'plain');
6246 }
6247
6248 # format-patch-style patches
6249 sub git_patch {
6250         git_commitdiff(-format => 'patch', -single => 1);
6251 }
6252
6253 sub git_patches {
6254         git_commitdiff(-format => 'patch');
6255 }
6256
6257 sub git_history {
6258         git_log_generic('history', \&git_history_body,
6259                         $hash_base, $hash_parent_base,
6260                         $file_name, $hash);
6261 }
6262
6263 sub git_search {
6264         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6265         if (!defined $searchtext) {
6266                 die_error(400, "Text field is empty");
6267         }
6268         if (!defined $hash) {
6269                 $hash = git_get_head_hash($project);
6270         }
6271         my %co = parse_commit($hash);
6272         if (!%co) {
6273                 die_error(404, "Unknown commit object");
6274         }
6275         if (!defined $page) {
6276                 $page = 0;
6277         }
6278
6279         $searchtype ||= 'commit';
6280         if ($searchtype eq 'pickaxe') {
6281                 # pickaxe may take all resources of your box and run for several minutes
6282                 # with every query - so decide by yourself how public you make this feature
6283                 gitweb_check_feature('pickaxe')
6284                     or die_error(403, "Pickaxe is disabled");
6285         }
6286         if ($searchtype eq 'grep') {
6287                 gitweb_check_feature('grep')[0]
6288                     or die_error(403, "Grep is disabled");
6289         }
6290
6291         git_header_html();
6292
6293         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6294                 my $greptype;
6295                 if ($searchtype eq 'commit') {
6296                         $greptype = "--grep=";
6297                 } elsif ($searchtype eq 'author') {
6298                         $greptype = "--author=";
6299                 } elsif ($searchtype eq 'committer') {
6300                         $greptype = "--committer=";
6301                 }
6302                 $greptype .= $searchtext;
6303                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6304                                                $greptype, '--regexp-ignore-case',
6305                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6306
6307                 my $paging_nav = '';
6308                 if ($page > 0) {
6309                         $paging_nav .=
6310                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6311                                                        searchtext=>$searchtext,
6312                                                        searchtype=>$searchtype)},
6313                                         "first");
6314                         $paging_nav .= " &sdot; " .
6315                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6316                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6317                 } else {
6318                         $paging_nav .= "first";
6319                         $paging_nav .= " &sdot; prev";
6320                 }
6321                 my $next_link = '';
6322                 if ($#commitlist >= 100) {
6323                         $next_link =
6324                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6325                                          -accesskey => "n", -title => "Alt-n"}, "next");
6326                         $paging_nav .= " &sdot; $next_link";
6327                 } else {
6328                         $paging_nav .= " &sdot; next";
6329                 }
6330
6331                 if ($#commitlist >= 100) {
6332                 }
6333
6334                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6335                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6336                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6337         }
6338
6339         if ($searchtype eq 'pickaxe') {
6340                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6341                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6342
6343                 print "<table class=\"pickaxe search\">\n";
6344                 my $alternate = 1;
6345                 local $/ = "\n";
6346                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6347                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6348                         ($search_use_regexp ? '--pickaxe-regex' : ());
6349                 undef %co;
6350                 my @files;
6351                 while (my $line = <$fd>) {
6352                         chomp $line;
6353                         next unless $line;
6354
6355                         my %set = parse_difftree_raw_line($line);
6356                         if (defined $set{'commit'}) {
6357                                 # finish previous commit
6358                                 if (%co) {
6359                                         print "</td>\n" .
6360                                               "<td class=\"link\">" .
6361                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6362                                               " | " .
6363                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6364                                         print "</td>\n" .
6365                                               "</tr>\n";
6366                                 }
6367
6368                                 if ($alternate) {
6369                                         print "<tr class=\"dark\">\n";
6370                                 } else {
6371                                         print "<tr class=\"light\">\n";
6372                                 }
6373                                 $alternate ^= 1;
6374                                 %co = parse_commit($set{'commit'});
6375                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6376                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6377                                       "<td><i>$author</i></td>\n" .
6378                                       "<td>" .
6379                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6380                                               -class => "list subject"},
6381                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6382                         } elsif (defined $set{'to_id'}) {
6383                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6384
6385                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6386                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6387                                               -class => "list"},
6388                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6389                                       "<br/>\n";
6390                         }
6391                 }
6392                 close $fd;
6393
6394                 # finish last commit (warning: repetition!)
6395                 if (%co) {
6396                         print "</td>\n" .
6397                               "<td class=\"link\">" .
6398                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6399                               " | " .
6400                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6401                         print "</td>\n" .
6402                               "</tr>\n";
6403                 }
6404
6405                 print "</table>\n";
6406         }
6407
6408         if ($searchtype eq 'grep') {
6409                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6410                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6411
6412                 print "<table class=\"grep_search\">\n";
6413                 my $alternate = 1;
6414                 my $matches = 0;
6415                 local $/ = "\n";
6416                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6417                         $search_use_regexp ? ('-E', '-i') : '-F',
6418                         $searchtext, $co{'tree'};
6419                 my $lastfile = '';
6420                 while (my $line = <$fd>) {
6421                         chomp $line;
6422                         my ($file, $lno, $ltext, $binary);
6423                         last if ($matches++ > 1000);
6424                         if ($line =~ /^Binary file (.+) matches$/) {
6425                                 $file = $1;
6426                                 $binary = 1;
6427                         } else {
6428                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6429                         }
6430                         if ($file ne $lastfile) {
6431                                 $lastfile and print "</td></tr>\n";
6432                                 if ($alternate++) {
6433                                         print "<tr class=\"dark\">\n";
6434                                 } else {
6435                                         print "<tr class=\"light\">\n";
6436                                 }
6437                                 print "<td class=\"list\">".
6438                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6439                                                                file_name=>"$file"),
6440                                                 -class => "list"}, esc_path($file));
6441                                 print "</td><td>\n";
6442                                 $lastfile = $file;
6443                         }
6444                         if ($binary) {
6445                                 print "<div class=\"binary\">Binary file</div>\n";
6446                         } else {
6447                                 $ltext = untabify($ltext);
6448                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6449                                         $ltext = esc_html($1, -nbsp=>1);
6450                                         $ltext .= '<span class="match">';
6451                                         $ltext .= esc_html($2, -nbsp=>1);
6452                                         $ltext .= '</span>';
6453                                         $ltext .= esc_html($3, -nbsp=>1);
6454                                 } else {
6455                                         $ltext = esc_html($ltext, -nbsp=>1);
6456                                 }
6457                                 print "<div class=\"pre\">" .
6458                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6459                                                                file_name=>"$file").'#l'.$lno,
6460                                                 -class => "linenr"}, sprintf('%4i', $lno))
6461                                         . ' ' .  $ltext . "</div>\n";
6462                         }
6463                 }
6464                 if ($lastfile) {
6465                         print "</td></tr>\n";
6466                         if ($matches > 1000) {
6467                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6468                         }
6469                 } else {
6470                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6471                 }
6472                 close $fd;
6473
6474                 print "</table>\n";
6475         }
6476         git_footer_html();
6477 }
6478
6479 sub git_search_help {
6480         git_header_html();
6481         git_print_page_nav('','', $hash,$hash,$hash);
6482         print <<EOT;
6483 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6484 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6485 the pattern entered is recognized as the POSIX extended
6486 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6487 insensitive).</p>
6488 <dl>
6489 <dt><b>commit</b></dt>
6490 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6491 EOT
6492         my $have_grep = gitweb_check_feature('grep');
6493         if ($have_grep) {
6494                 print <<EOT;
6495 <dt><b>grep</b></dt>
6496 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6497     a different one) are searched for the given pattern. On large trees, this search can take
6498 a while and put some strain on the server, so please use it with some consideration. Note that
6499 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6500 case-sensitive.</dd>
6501 EOT
6502         }
6503         print <<EOT;
6504 <dt><b>author</b></dt>
6505 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6506 <dt><b>committer</b></dt>
6507 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6508 EOT
6509         my $have_pickaxe = gitweb_check_feature('pickaxe');
6510         if ($have_pickaxe) {
6511                 print <<EOT;
6512 <dt><b>pickaxe</b></dt>
6513 <dd>All commits that caused the string to appear or disappear from any file (changes that
6514 added, removed or "modified" the string) will be listed. This search can take a while and
6515 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6516 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6517 EOT
6518         }
6519         print "</dl>\n";
6520         git_footer_html();
6521 }
6522
6523 sub git_shortlog {
6524         git_log_generic('shortlog', \&git_shortlog_body,
6525                         $hash, $hash_parent);
6526 }
6527
6528 ## ......................................................................
6529 ## feeds (RSS, Atom; OPML)
6530
6531 sub git_feed {
6532         my $format = shift || 'atom';
6533         my $have_blame = gitweb_check_feature('blame');
6534
6535         # Atom: http://www.atomenabled.org/developers/syndication/
6536         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6537         if ($format ne 'rss' && $format ne 'atom') {
6538                 die_error(400, "Unknown web feed format");
6539         }
6540
6541         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6542         my $head = $hash || 'HEAD';
6543         my @commitlist = parse_commits($head, 150, 0, $file_name);
6544
6545         my %latest_commit;
6546         my %latest_date;
6547         my $content_type = "application/$format+xml";
6548         if (defined $cgi->http('HTTP_ACCEPT') &&
6549                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6550                 # browser (feed reader) prefers text/xml
6551                 $content_type = 'text/xml';
6552         }
6553         if (defined($commitlist[0])) {
6554                 %latest_commit = %{$commitlist[0]};
6555                 my $latest_epoch = $latest_commit{'committer_epoch'};
6556                 %latest_date   = parse_date($latest_epoch);
6557                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6558                 if (defined $if_modified) {
6559                         my $since;
6560                         if (eval { require HTTP::Date; 1; }) {
6561                                 $since = HTTP::Date::str2time($if_modified);
6562                         } elsif (eval { require Time::ParseDate; 1; }) {
6563                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6564                         }
6565                         if (defined $since && $latest_epoch <= $since) {
6566                                 print $cgi->header(
6567                                         -type => $content_type,
6568                                         -charset => 'utf-8',
6569                                         -last_modified => $latest_date{'rfc2822'},
6570                                         -status => '304 Not Modified');
6571                                 return;
6572                         }
6573                 }
6574                 print $cgi->header(
6575                         -type => $content_type,
6576                         -charset => 'utf-8',
6577                         -last_modified => $latest_date{'rfc2822'});
6578         } else {
6579                 print $cgi->header(
6580                         -type => $content_type,
6581                         -charset => 'utf-8');
6582         }
6583
6584         # Optimization: skip generating the body if client asks only
6585         # for Last-Modified date.
6586         return if ($cgi->request_method() eq 'HEAD');
6587
6588         # header variables
6589         my $title = "$site_name - $project/$action";
6590         my $feed_type = 'log';
6591         if (defined $hash) {
6592                 $title .= " - '$hash'";
6593                 $feed_type = 'branch log';
6594                 if (defined $file_name) {
6595                         $title .= " :: $file_name";
6596                         $feed_type = 'history';
6597                 }
6598         } elsif (defined $file_name) {
6599                 $title .= " - $file_name";
6600                 $feed_type = 'history';
6601         }
6602         $title .= " $feed_type";
6603         my $descr = git_get_project_description($project);
6604         if (defined $descr) {
6605                 $descr = esc_html($descr);
6606         } else {
6607                 $descr = "$project " .
6608                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6609                          " feed";
6610         }
6611         my $owner = git_get_project_owner($project);
6612         $owner = esc_html($owner);
6613
6614         #header
6615         my $alt_url;
6616         if (defined $file_name) {
6617                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6618         } elsif (defined $hash) {
6619                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6620         } else {
6621                 $alt_url = href(-full=>1, action=>"summary");
6622         }
6623         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6624         if ($format eq 'rss') {
6625                 print <<XML;
6626 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6627 <channel>
6628 XML
6629                 print "<title>$title</title>\n" .
6630                       "<link>$alt_url</link>\n" .
6631                       "<description>$descr</description>\n" .
6632                       "<language>en</language>\n" .
6633                       # project owner is responsible for 'editorial' content
6634                       "<managingEditor>$owner</managingEditor>\n";
6635                 if (defined $logo || defined $favicon) {
6636                         # prefer the logo to the favicon, since RSS
6637                         # doesn't allow both
6638                         my $img = esc_url($logo || $favicon);
6639                         print "<image>\n" .
6640                               "<url>$img</url>\n" .
6641                               "<title>$title</title>\n" .
6642                               "<link>$alt_url</link>\n" .
6643                               "</image>\n";
6644                 }
6645                 if (%latest_date) {
6646                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6647                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6648                 }
6649                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6650         } elsif ($format eq 'atom') {
6651                 print <<XML;
6652 <feed xmlns="http://www.w3.org/2005/Atom">
6653 XML
6654                 print "<title>$title</title>\n" .
6655                       "<subtitle>$descr</subtitle>\n" .
6656                       '<link rel="alternate" type="text/html" href="' .
6657                       $alt_url . '" />' . "\n" .
6658                       '<link rel="self" type="' . $content_type . '" href="' .
6659                       $cgi->self_url() . '" />' . "\n" .
6660                       "<id>" . href(-full=>1) . "</id>\n" .
6661                       # use project owner for feed author
6662                       "<author><name>$owner</name></author>\n";
6663                 if (defined $favicon) {
6664                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6665                 }
6666                 if (defined $logo_url) {
6667                         # not twice as wide as tall: 72 x 27 pixels
6668                         print "<logo>" . esc_url($logo) . "</logo>\n";
6669                 }
6670                 if (! %latest_date) {
6671                         # dummy date to keep the feed valid until commits trickle in:
6672                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6673                 } else {
6674                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6675                 }
6676                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6677         }
6678
6679         # contents
6680         for (my $i = 0; $i <= $#commitlist; $i++) {
6681                 my %co = %{$commitlist[$i]};
6682                 my $commit = $co{'id'};
6683                 # we read 150, we always show 30 and the ones more recent than 48 hours
6684                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6685                         last;
6686                 }
6687                 my %cd = parse_date($co{'author_epoch'});
6688
6689                 # get list of changed files
6690                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6691                         $co{'parent'} || "--root",
6692                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6693                         or next;
6694                 my @difftree = map { chomp; $_ } <$fd>;
6695                 close $fd
6696                         or next;
6697
6698                 # print element (entry, item)
6699                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6700                 if ($format eq 'rss') {
6701                         print "<item>\n" .
6702                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6703                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6704                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6705                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6706                               "<link>$co_url</link>\n" .
6707                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6708                               "<content:encoded>" .
6709                               "<![CDATA[\n";
6710                 } elsif ($format eq 'atom') {
6711                         print "<entry>\n" .
6712                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6713                               "<updated>$cd{'iso-8601'}</updated>\n" .
6714                               "<author>\n" .
6715                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6716                         if ($co{'author_email'}) {
6717                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6718                         }
6719                         print "</author>\n" .
6720                               # use committer for contributor
6721                               "<contributor>\n" .
6722                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6723                         if ($co{'committer_email'}) {
6724                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6725                         }
6726                         print "</contributor>\n" .
6727                               "<published>$cd{'iso-8601'}</published>\n" .
6728                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6729                               "<id>$co_url</id>\n" .
6730                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6731                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6732                 }
6733                 my $comment = $co{'comment'};
6734                 print "<pre>\n";
6735                 foreach my $line (@$comment) {
6736                         $line = esc_html($line);
6737                         print "$line\n";
6738                 }
6739                 print "</pre><ul>\n";
6740                 foreach my $difftree_line (@difftree) {
6741                         my %difftree = parse_difftree_raw_line($difftree_line);
6742                         next if !$difftree{'from_id'};
6743
6744                         my $file = $difftree{'file'} || $difftree{'to_file'};
6745
6746                         print "<li>" .
6747                               "[" .
6748                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6749                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6750                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6751                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6752                                       -title => "diff"}, 'D');
6753                         if ($have_blame) {
6754                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6755                                                              file_name=>$file, hash_base=>$commit),
6756                                               -title => "blame"}, 'B');
6757                         }
6758                         # if this is not a feed of a file history
6759                         if (!defined $file_name || $file_name ne $file) {
6760                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6761                                                              file_name=>$file, hash=>$commit),
6762                                               -title => "history"}, 'H');
6763                         }
6764                         $file = esc_path($file);
6765                         print "] ".
6766                               "$file</li>\n";
6767                 }
6768                 if ($format eq 'rss') {
6769                         print "</ul>]]>\n" .
6770                               "</content:encoded>\n" .
6771                               "</item>\n";
6772                 } elsif ($format eq 'atom') {
6773                         print "</ul>\n</div>\n" .
6774                               "</content>\n" .
6775                               "</entry>\n";
6776                 }
6777         }
6778
6779         # end of feed
6780         if ($format eq 'rss') {
6781                 print "</channel>\n</rss>\n";
6782         } elsif ($format eq 'atom') {
6783                 print "</feed>\n";
6784         }
6785 }
6786
6787 sub git_rss {
6788         git_feed('rss');
6789 }
6790
6791 sub git_atom {
6792         git_feed('atom');
6793 }
6794
6795 sub git_opml {
6796         my @list = git_get_projects_list();
6797
6798         print $cgi->header(
6799                 -type => 'text/xml',
6800                 -charset => 'utf-8',
6801                 -content_disposition => 'inline; filename="opml.xml"');
6802
6803         print <<XML;
6804 <?xml version="1.0" encoding="utf-8"?>
6805 <opml version="1.0">
6806 <head>
6807   <title>$site_name OPML Export</title>
6808 </head>
6809 <body>
6810 <outline text="git RSS feeds">
6811 XML
6812
6813         foreach my $pr (@list) {
6814                 my %proj = %$pr;
6815                 my $head = git_get_head_hash($proj{'path'});
6816                 if (!defined $head) {
6817                         next;
6818                 }
6819                 $git_dir = "$projectroot/$proj{'path'}";
6820                 my %co = parse_commit($head);
6821                 if (!%co) {
6822                         next;
6823                 }
6824
6825                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6826                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6827                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6828                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6829         }
6830         print <<XML;
6831 </outline>
6832 </body>
6833 </opml>
6834 XML
6835 }