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 $version = "++GIT_VERSION++";
  32
  33 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  34 sub evaluate_uri {
  35         our $cgi;
  36
  37         our $my_url = $cgi->url();
  38         our $my_uri = $cgi->url(-absolute => 1);
  39
  40         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  41         # needed and used only for URLs with nonempty PATH_INFO
  42         our $base_url = $my_url;
  43
  44         # When the script is used as DirectoryIndex, the URL does not contain the name
  45         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  46         # have to do it ourselves. We make $path_info global because it's also used
  47         # later on.
  48         #
  49         # Another issue with the script being the DirectoryIndex is that the resulting
  50         # $my_url data is not the full script URL: this is good, because we want
  51         # generated links to keep implying the script name if it wasn't explicitly
  52         # indicated in the URL we're handling, but it means that $my_url cannot be used
  53         # as base URL.
  54         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  55         # to build the base URL ourselves:
  56         our $path_info = $ENV{"PATH_INFO"};
  57         if ($path_info) {
  58                 if ($my_url =~ s,\Q$path_info\E$,, &&
  59                     $my_uri =~ s,\Q$path_info\E$,, &&
  60                     defined $ENV{'SCRIPT_NAME'}) {
  61                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  62                 }
  63         }
  64
  65         # target of the home link on top of all pages
  66         our $home_link = $my_uri || "/";
  67 }
  68
  69 # core git executable to use
  70 # this can just be "git" if your webserver has a sensible PATH
  71 our $GIT = "++GIT_BINDIR++/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "++GITWEB_PROJECTROOT++";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  83
  84 # name of your site or organization to appear in page titles
  85 # replace this with something more descriptive for clearer bookmarks
  86 our $site_name = "++GITWEB_SITENAME++"
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "++GITWEB_SITE_HEADER++";
  91 # html text to include at home page
  92 our $home_text = "++GITWEB_HOMETEXT++";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "++GITWEB_SITE_FOOTER++";
  95
  96 # URI of stylesheets
  97 our @stylesheets = ("++GITWEB_CSS++");
  98 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  99 our $stylesheet = undef;
 100
 101 # URI of GIT logo (72x27 size)
 102 our $logo = "++GITWEB_LOGO++";
 103 # URI of GIT favicon, assumed to be image/png type
 104 our $favicon = "++GITWEB_FAVICON++";
 105 # URI of gitweb.js (JavaScript code for gitweb)
 106 our $javascript = "++GITWEB_JS++";
 107
 108 # URI and label (title) of GIT logo link
 109 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110 #our $logo_label = "git documentation";
 111 our $logo_url = "http://git-scm.com/";
 112 our $logo_label = "git homepage";
 113
 114 # source of projects list
 115 our $projects_list = "++GITWEB_LIST++";
 116
 117 # the width (in characters) of the projects list "Description" column
 118 our $projects_list_description_width = 25;
 119
 120 # default order of projects list
 121 # valid values are none, project, descr, owner, and age
 122 our $default_projects_order = "project";
 123
 124 # show repository only if this file exists
 125 # (only effective if this variable evaluates to true)
 126 our $export_ok = "++GITWEB_EXPORT_OK++";
 127
 128 # show repository only if this subroutine returns true
 129 # when given the path to the project, for example:
 130 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 131 our $export_auth_hook = undef;
 132
 133 # only allow viewing of repositories also shown on the overview page
 134 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 135
 136 # list of git base URLs used for URL to where fetch project from,
 137 # i.e. full URL is "$git_base_url/$project"
 138 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 139
 140 # default blob_plain mimetype and default charset for text/plain blob
 141 our $default_blob_plain_mimetype = 'text/plain';
 142 our $default_text_plain_charset  = undef;
 143
 144 # file to use for guessing MIME types before trying /etc/mime.types
 145 # (relative to the current git repository)
 146 our $mimetypes_file = undef;
 147
 148 # assume this charset if line contains non-UTF-8 characters;
 149 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 150 # for which encoding all byte sequences are valid, for example
 151 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 152 # could be even 'utf-8' for the old behavior)
 153 our $fallback_encoding = 'latin1';
 154
 155 # rename detection options for git-diff and git-diff-tree
 156 # - default is '-M', with the cost proportional to
 157 #   (number of removed files) * (number of new files).
 158 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 159 #   (number of changed files + number of removed files) * (number of new files)
 160 # - even more costly is '-C', '--find-copies-harder' with cost
 161 #   (number of files in the original tree) * (number of new files)
 162 # - one might want to include '-B' option, e.g. '-B', '-M'
 163 our @diff_opts = ('-M'); # taken from git_commit
 164
 165 # Disables features that would allow repository owners to inject script into
 166 # the gitweb domain.
 167 our $prevent_xss = 0;
 168
 169 # information about snapshot formats that gitweb is capable of serving
 170 our %known_snapshot_formats = (
 171         # name => {
 172         #       'display' => display name,
 173         #       'type' => mime type,
 174         #       'suffix' => filename suffix,
 175         #       'format' => --format for git-archive,
 176         #       'compressor' => [compressor command and arguments]
 177         #                       (array reference, optional)
 178         #       'disabled' => boolean (optional)}
 179         #
 180         'tgz' => {
 181                 'display' => 'tar.gz',
 182                 'type' => 'application/x-gzip',
 183                 'suffix' => '.tar.gz',
 184                 'format' => 'tar',
 185                 'compressor' => ['gzip']},
 186
 187         'tbz2' => {
 188                 'display' => 'tar.bz2',
 189                 'type' => 'application/x-bzip2',
 190                 'suffix' => '.tar.bz2',
 191                 'format' => 'tar',
 192                 'compressor' => ['bzip2']},
 193
 194         'txz' => {
 195                 'display' => 'tar.xz',
 196                 'type' => 'application/x-xz',
 197                 'suffix' => '.tar.xz',
 198                 'format' => 'tar',
 199                 'compressor' => ['xz'],
 200                 'disabled' => 1},
 201
 202         'zip' => {
 203                 'display' => 'zip',
 204                 'type' => 'application/x-zip',
 205                 'suffix' => '.zip',
 206                 'format' => 'zip'},
 207 );
 208
 209 # Aliases so we understand old gitweb.snapshot values in repository
 210 # configuration.
 211 our %known_snapshot_format_aliases = (
 212         'gzip'  => 'tgz',
 213         'bzip2' => 'tbz2',
 214         'xz'    => 'txz',
 215
 216         # backward compatibility: legacy gitweb config support
 217         'x-gzip' => undef, 'gz' => undef,
 218         'x-bzip2' => undef, 'bz2' => undef,
 219         'x-zip' => undef, '' => undef,
 220 );
 221
 222 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 223 # are changed, it may be appropriate to change these values too via
 224 # $GITWEB_CONFIG.
 225 our %avatar_size = (
 226         'default' => 16,
 227         'double'  => 32
 228 );
 229
 230 # Used to set the maximum load that we will still respond to gitweb queries.
 231 # If server load exceed this value then return "503 server busy" error.
 232 # If gitweb cannot determined server load, it is taken to be 0.
 233 # Leave it undefined (or set to 'undef') to turn off load checking.
 234 our $maxload = 300;
 235
 236 # You define site-wide feature defaults here; override them with
 237 # $GITWEB_CONFIG as necessary.
 238 our %feature = (
 239         # feature => {
 240         #       'sub' => feature-sub (subroutine),
 241         #       'override' => allow-override (boolean),
 242         #       'default' => [ default options...] (array reference)}
 243         #
 244         # if feature is overridable (it means that allow-override has true value),
 245         # then feature-sub will be called with default options as parameters;
 246         # return value of feature-sub indicates if to enable specified feature
 247         #
 248         # if there is no 'sub' key (no feature-sub), then feature cannot be
 249         # overriden
 250         #
 251         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 252         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 253         # is enabled
 254
 255         # Enable the 'blame' blob view, showing the last commit that modified
 256         # each line in the file. This can be very CPU-intensive.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'blame'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'blame'}{'override'} = 1;
 262         # and in project config gitweb.blame = 0|1;
 263         'blame' => {
 264                 'sub' => sub { feature_bool('blame', @_) },
 265                 'override' => 0,
 266                 'default' => [0]},
 267
 268         # Enable the 'snapshot' link, providing a compressed archive of any
 269         # tree. This can potentially generate high traffic if you have large
 270         # project.
 271
 272         # Value is a list of formats defined in %known_snapshot_formats that
 273         # you wish to offer.
 274         # To disable system wide have in $GITWEB_CONFIG
 275         # $feature{'snapshot'}{'default'} = [];
 276         # To have project specific config enable override in $GITWEB_CONFIG
 277         # $feature{'snapshot'}{'override'} = 1;
 278         # and in project config, a comma-separated list of formats or "none"
 279         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 280         'snapshot' => {
 281                 'sub' => \&feature_snapshot,
 282                 'override' => 0,
 283                 'default' => ['tgz']},
 284
 285         # Enable text search, which will list the commits which match author,
 286         # committer or commit text to a given string.  Enabled by default.
 287         # Project specific override is not supported.
 288         'search' => {
 289                 'override' => 0,
 290                 'default' => [1]},
 291
 292         # Enable grep search, which will list the files in currently selected
 293         # tree containing the given string. Enabled by default. This can be
 294         # potentially CPU-intensive, of course.
 295
 296         # To enable system wide have in $GITWEB_CONFIG
 297         # $feature{'grep'}{'default'} = [1];
 298         # To have project specific config enable override in $GITWEB_CONFIG
 299         # $feature{'grep'}{'override'} = 1;
 300         # and in project config gitweb.grep = 0|1;
 301         'grep' => {
 302                 'sub' => sub { feature_bool('grep', @_) },
 303                 'override' => 0,
 304                 'default' => [1]},
 305
 306         # Enable the pickaxe search, which will list the commits that modified
 307         # a given string in a file. This can be practical and quite faster
 308         # alternative to 'blame', but still potentially CPU-intensive.
 309
 310         # To enable system wide have in $GITWEB_CONFIG
 311         # $feature{'pickaxe'}{'default'} = [1];
 312         # To have project specific config enable override in $GITWEB_CONFIG
 313         # $feature{'pickaxe'}{'override'} = 1;
 314         # and in project config gitweb.pickaxe = 0|1;
 315         'pickaxe' => {
 316                 'sub' => sub { feature_bool('pickaxe', @_) },
 317                 'override' => 0,
 318                 'default' => [1]},
 319
 320         # Enable showing size of blobs in a 'tree' view, in a separate
 321         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 322
 323         # To disable system wide have in $GITWEB_CONFIG
 324         # $feature{'show-sizes'}{'default'} = [0];
 325         # To have project specific config enable override in $GITWEB_CONFIG
 326         # $feature{'show-sizes'}{'override'} = 1;
 327         # and in project config gitweb.showsizes = 0|1;
 328         'show-sizes' => {
 329                 'sub' => sub { feature_bool('showsizes', @_) },
 330                 'override' => 0,
 331                 'default' => [1]},
 332
 333         # Make gitweb use an alternative format of the URLs which can be
 334         # more readable and natural-looking: project name is embedded
 335         # directly in the path and the query string contains other
 336         # auxiliary information. All gitweb installations recognize
 337         # URL in either format; this configures in which formats gitweb
 338         # generates links.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'pathinfo'}{'default'} = [1];
 342         # Project specific override is not supported.
 343
 344         # Note that you will need to change the default location of CSS,
 345         # favicon, logo and possibly other files to an absolute URL. Also,
 346         # if gitweb.cgi serves as your indexfile, you will need to force
 347         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 348         'pathinfo' => {
 349                 'override' => 0,
 350                 'default' => [0]},
 351
 352         # Make gitweb consider projects in project root subdirectories
 353         # to be forks of existing projects. Given project $projname.git,
 354         # projects matching $projname/*.git will not be shown in the main
 355         # projects list, instead a '+' mark will be added to $projname
 356         # there and a 'forks' view will be enabled for the project, listing
 357         # all the forks. If project list is taken from a file, forks have
 358         # to be listed after the main project.
 359
 360         # To enable system wide have in $GITWEB_CONFIG
 361         # $feature{'forks'}{'default'} = [1];
 362         # Project specific override is not supported.
 363         'forks' => {
 364                 'override' => 0,
 365                 'default' => [0]},
 366
 367         # Insert custom links to the action bar of all project pages.
 368         # This enables you mainly to link to third-party scripts integrating
 369         # into gitweb; e.g. git-browser for graphical history representation
 370         # or custom web-based repository administration interface.
 371
 372         # The 'default' value consists of a list of triplets in the form
 373         # (label, link, position) where position is the label after which
 374         # to insert the link and link is a format string where %n expands
 375         # to the project name, %f to the project path within the filesystem,
 376         # %h to the current hash (h gitweb parameter) and %b to the current
 377         # hash base (hb gitweb parameter); %% expands to %.
 378
 379         # To enable system wide have in $GITWEB_CONFIG e.g.
 380         # $feature{'actions'}{'default'} = [('graphiclog',
 381         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 382         # Project specific override is not supported.
 383         'actions' => {
 384                 'override' => 0,
 385                 'default' => []},
 386
 387         # Allow gitweb scan project content tags described in ctags/
 388         # of project repository, and display the popular Web 2.0-ish
 389         # "tag cloud" near the project list. Note that this is something
 390         # COMPLETELY different from the normal Git tags.
 391
 392         # gitweb by itself can show existing tags, but it does not handle
 393         # tagging itself; you need an external application for that.
 394         # For an example script, check Girocco's cgi/tagproj.cgi.
 395         # You may want to install the HTML::TagCloud Perl module to get
 396         # a pretty tag cloud instead of just a list of tags.
 397
 398         # To enable system wide have in $GITWEB_CONFIG
 399         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 400         # Project specific override is not supported.
 401         'ctags' => {
 402                 'override' => 0,
 403                 'default' => [0]},
 404
 405         # The maximum number of patches in a patchset generated in patch
 406         # view. Set this to 0 or undef to disable patch view, or to a
 407         # negative number to remove any limit.
 408
 409         # To disable system wide have in $GITWEB_CONFIG
 410         # $feature{'patches'}{'default'} = [0];
 411         # To have project specific config enable override in $GITWEB_CONFIG
 412         # $feature{'patches'}{'override'} = 1;
 413         # and in project config gitweb.patches = 0|n;
 414         # where n is the maximum number of patches allowed in a patchset.
 415         'patches' => {
 416                 'sub' => \&feature_patches,
 417                 'override' => 0,
 418                 'default' => [16]},
 419
 420         # Avatar support. When this feature is enabled, views such as
 421         # shortlog or commit will display an avatar associated with
 422         # the email of the committer(s) and/or author(s).
 423
 424         # Currently available providers are gravatar and picon.
 425         # If an unknown provider is specified, the feature is disabled.
 426
 427         # Gravatar depends on Digest::MD5.
 428         # Picon currently relies on the indiana.edu database.
 429
 430         # To enable system wide have in $GITWEB_CONFIG
 431         # $feature{'avatar'}{'default'} = ['<provider>'];
 432         # where <provider> is either gravatar or picon.
 433         # To have project specific config enable override in $GITWEB_CONFIG
 434         # $feature{'avatar'}{'override'} = 1;
 435         # and in project config gitweb.avatar = <provider>;
 436         'avatar' => {
 437                 'sub' => \&feature_avatar,
 438                 'override' => 0,
 439                 'default' => ['']},
 440
 441         # Enable displaying how much time and how many git commands
 442         # it took to generate and display page.  Disabled by default.
 443         # Project specific override is not supported.
 444         'timed' => {
 445                 'override' => 0,
 446                 'default' => [0]},
 447
 448         # Enable turning some links into links to actions which require
 449         # JavaScript to run (like 'blame_incremental').  Not enabled by
 450         # default.  Project specific override is currently not supported.
 451         'javascript-actions' => {
 452                 'override' => 0,
 453                 'default' => [0]},
 454
 455         # Syntax highlighting support. This is based on Daniel Svensson's
 456         # and Sham Chukoury's work in gitweb-xmms2.git.
 457         # It requires the 'highlight' program present in $PATH,
 458         # and therefore is disabled by default.
 459
 460         # To enable system wide have in $GITWEB_CONFIG
 461         # $feature{'highlight'}{'default'} = [1];
 462
 463         'highlight' => {
 464                 'sub' => sub { feature_bool('highlight', @_) },
 465                 'override' => 0,
 466                 'default' => [0]},
 467 );
 468
 469 sub gitweb_get_feature {
 470         my ($name) = @_;
 471         return unless exists $feature{$name};
 472         my ($sub, $override, @defaults) = (
 473                 $feature{$name}{'sub'},
 474                 $feature{$name}{'override'},
 475                 @{$feature{$name}{'default'}});
 476         # project specific override is possible only if we have project
 477         our $git_dir; # global variable, declared later
 478         if (!$override || !defined $git_dir) {
 479                 return @defaults;
 480         }
 481         if (!defined $sub) {
 482                 warn "feature $name is not overridable";
 483                 return @defaults;
 484         }
 485         return $sub->(@defaults);
 486 }
 487
 488 # A wrapper to check if a given feature is enabled.
 489 # With this, you can say
 490 #
 491 #   my $bool_feat = gitweb_check_feature('bool_feat');
 492 #   gitweb_check_feature('bool_feat') or somecode;
 493 #
 494 # instead of
 495 #
 496 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 497 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 498 #
 499 sub gitweb_check_feature {
 500         return (gitweb_get_feature(@_))[0];
 501 }
 502
 503
 504 sub feature_bool {
 505         my $key = shift;
 506         my ($val) = git_get_project_config($key, '--bool');
 507
 508         if (!defined $val) {
 509                 return ($_[0]);
 510         } elsif ($val eq 'true') {
 511                 return (1);
 512         } elsif ($val eq 'false') {
 513                 return (0);
 514         }
 515 }
 516
 517 sub feature_snapshot {
 518         my (@fmts) = @_;
 519
 520         my ($val) = git_get_project_config('snapshot');
 521
 522         if ($val) {
 523                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 524         }
 525
 526         return @fmts;
 527 }
 528
 529 sub feature_patches {
 530         my @val = (git_get_project_config('patches', '--int'));
 531
 532         if (@val) {
 533                 return @val;
 534         }
 535
 536         return ($_[0]);
 537 }
 538
 539 sub feature_avatar {
 540         my @val = (git_get_project_config('avatar'));
 541
 542         return @val ? @val : @_;
 543 }
 544
 545 # checking HEAD file with -e is fragile if the repository was
 546 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 547 # and then pruned.
 548 sub check_head_link {
 549         my ($dir) = @_;
 550         my $headfile = "$dir/HEAD";
 551         return ((-e $headfile) ||
 552                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 553 }
 554
 555 sub check_export_ok {
 556         my ($dir) = @_;
 557         return (check_head_link($dir) &&
 558                 (!$export_ok || -e "$dir/$export_ok") &&
 559                 (!$export_auth_hook || $export_auth_hook->($dir)));
 560 }
 561
 562 # process alternate names for backward compatibility
 563 # filter out unsupported (unknown) snapshot formats
 564 sub filter_snapshot_fmts {
 565         my @fmts = @_;
 566
 567         @fmts = map {
 568                 exists $known_snapshot_format_aliases{$_} ?
 569                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 570         @fmts = grep {
 571                 exists $known_snapshot_formats{$_} &&
 572                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 573 }
 574
 575 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 576 sub evaluate_gitweb_config {
 577         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 578         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 579         # die if there are errors parsing config file
 580         if (-e $GITWEB_CONFIG) {
 581                 do $GITWEB_CONFIG;
 582                 die $@ if $@;
 583         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 584                 do $GITWEB_CONFIG_SYSTEM;
 585                 die $@ if $@;
 586         }
 587 }
 588
 589 # Get loadavg of system, to compare against $maxload.
 590 # Currently it requires '/proc/loadavg' present to get loadavg;
 591 # if it is not present it returns 0, which means no load checking.
 592 sub get_loadavg {
 593         if( -e '/proc/loadavg' ){
 594                 open my $fd, '<', '/proc/loadavg'
 595                         or return 0;
 596                 my @load = split(/\s+/, scalar <$fd>);
 597                 close $fd;
 598
 599                 # The first three columns measure CPU and IO utilization of the last one,
 600                 # five, and 10 minute periods.  The fourth column shows the number of
 601                 # currently running processes and the total number of processes in the m/n
 602                 # format.  The last column displays the last process ID used.
 603                 return $load[0] || 0;
 604         }
 605         # additional checks for load average should go here for things that don't export
 606         # /proc/loadavg
 607
 608         return 0;
 609 }
 610
 611 # version of the core git binary
 612 our $git_version;
 613 sub evaluate_git_version {
 614         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 615         $number_of_git_cmds++;
 616 }
 617
 618 sub check_loadavg {
 619         if (defined $maxload && get_loadavg() > $maxload) {
 620                 die_error(503, "The load average on the server is too high");
 621         }
 622 }
 623
 624 # ======================================================================
 625 # input validation and dispatch
 626
 627 # input parameters can be collected from a variety of sources (presently, CGI
 628 # and PATH_INFO), so we define an %input_params hash that collects them all
 629 # together during validation: this allows subsequent uses (e.g. href()) to be
 630 # agnostic of the parameter origin
 631
 632 our %input_params = ();
 633
 634 # input parameters are stored with the long parameter name as key. This will
 635 # also be used in the href subroutine to convert parameters to their CGI
 636 # equivalent, and since the href() usage is the most frequent one, we store
 637 # the name -> CGI key mapping here, instead of the reverse.
 638 #
 639 # XXX: Warning: If you touch this, check the search form for updating,
 640 # too.
 641
 642 our @cgi_param_mapping = (
 643         project => "p",
 644         action => "a",
 645         file_name => "f",
 646         file_parent => "fp",
 647         hash => "h",
 648         hash_parent => "hp",
 649         hash_base => "hb",
 650         hash_parent_base => "hpb",
 651         page => "pg",
 652         order => "o",
 653         searchtext => "s",
 654         searchtype => "st",
 655         snapshot_format => "sf",
 656         extra_options => "opt",
 657         search_use_regexp => "sr",
 658         # this must be last entry (for manipulation from JavaScript)
 659         javascript => "js"
 660 );
 661 our %cgi_param_mapping = @cgi_param_mapping;
 662
 663 # we will also need to know the possible actions, for validation
 664 our %actions = (
 665         "blame" => \&git_blame,
 666         "blame_incremental" => \&git_blame_incremental,
 667         "blame_data" => \&git_blame_data,
 668         "blobdiff" => \&git_blobdiff,
 669         "blobdiff_plain" => \&git_blobdiff_plain,
 670         "blob" => \&git_blob,
 671         "blob_plain" => \&git_blob_plain,
 672         "commitdiff" => \&git_commitdiff,
 673         "commitdiff_plain" => \&git_commitdiff_plain,
 674         "commit" => \&git_commit,
 675         "forks" => \&git_forks,
 676         "heads" => \&git_heads,
 677         "history" => \&git_history,
 678         "log" => \&git_log,
 679         "patch" => \&git_patch,
 680         "patches" => \&git_patches,
 681         "rss" => \&git_rss,
 682         "atom" => \&git_atom,
 683         "search" => \&git_search,
 684         "search_help" => \&git_search_help,
 685         "shortlog" => \&git_shortlog,
 686         "summary" => \&git_summary,
 687         "tag" => \&git_tag,
 688         "tags" => \&git_tags,
 689         "tree" => \&git_tree,
 690         "snapshot" => \&git_snapshot,
 691         "object" => \&git_object,
 692         # those below don't need $project
 693         "opml" => \&git_opml,
 694         "project_list" => \&git_project_list,
 695         "project_index" => \&git_project_index,
 696 );
 697
 698 # finally, we have the hash of allowed extra_options for the commands that
 699 # allow them
 700 our %allowed_options = (
 701         "--no-merges" => [ qw(rss atom log shortlog history) ],
 702 );
 703
 704 # fill %input_params with the CGI parameters. All values except for 'opt'
 705 # should be single values, but opt can be an array. We should probably
 706 # build an array of parameters that can be multi-valued, but since for the time
 707 # being it's only this one, we just single it out
 708 sub evaluate_query_params {
 709         our $cgi;
 710
 711         while (my ($name, $symbol) = each %cgi_param_mapping) {
 712                 if ($symbol eq 'opt') {
 713                         $input_params{$name} = [ $cgi->param($symbol) ];
 714                 } else {
 715                         $input_params{$name} = $cgi->param($symbol);
 716                 }
 717         }
 718 }
 719
 720 # now read PATH_INFO and update the parameter list for missing parameters
 721 sub evaluate_path_info {
 722         return if defined $input_params{'project'};
 723         return if !$path_info;
 724         $path_info =~ s,^/+,,;
 725         return if !$path_info;
 726
 727         # find which part of PATH_INFO is project
 728         my $project = $path_info;
 729         $project =~ s,/+$,,;
 730         while ($project && !check_head_link("$projectroot/$project")) {
 731                 $project =~ s,/*[^/]*$,,;
 732         }
 733         return unless $project;
 734         $input_params{'project'} = $project;
 735
 736         # do not change any parameters if an action is given using the query string
 737         return if $input_params{'action'};
 738         $path_info =~ s,^\Q$project\E/*,,;
 739
 740         # next, check if we have an action
 741         my $action = $path_info;
 742         $action =~ s,/.*$,,;
 743         if (exists $actions{$action}) {
 744                 $path_info =~ s,^$action/*,,;
 745                 $input_params{'action'} = $action;
 746         }
 747
 748         # list of actions that want hash_base instead of hash, but can have no
 749         # pathname (f) parameter
 750         my @wants_base = (
 751                 'tree',
 752                 'history',
 753         );
 754
 755         # we want to catch
 756         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 757         my ($parentrefname, $parentpathname, $refname, $pathname) =
 758                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 759
 760         # first, analyze the 'current' part
 761         if (defined $pathname) {
 762                 # we got "branch:filename" or "branch:dir/"
 763                 # we could use git_get_type(branch:pathname), but:
 764                 # - it needs $git_dir
 765                 # - it does a git() call
 766                 # - the convention of terminating directories with a slash
 767                 #   makes it superfluous
 768                 # - embedding the action in the PATH_INFO would make it even
 769                 #   more superfluous
 770                 $pathname =~ s,^/+,,;
 771                 if (!$pathname || substr($pathname, -1) eq "/") {
 772                         $input_params{'action'} ||= "tree";
 773                         $pathname =~ s,/$,,;
 774                 } else {
 775                         # the default action depends on whether we had parent info
 776                         # or not
 777                         if ($parentrefname) {
 778                                 $input_params{'action'} ||= "blobdiff_plain";
 779                         } else {
 780                                 $input_params{'action'} ||= "blob_plain";
 781                         }
 782                 }
 783                 $input_params{'hash_base'} ||= $refname;
 784                 $input_params{'file_name'} ||= $pathname;
 785         } elsif (defined $refname) {
 786                 # we got "branch". In this case we have to choose if we have to
 787                 # set hash or hash_base.
 788                 #
 789                 # Most of the actions without a pathname only want hash to be
 790                 # set, except for the ones specified in @wants_base that want
 791                 # hash_base instead. It should also be noted that hand-crafted
 792                 # links having 'history' as an action and no pathname or hash
 793                 # set will fail, but that happens regardless of PATH_INFO.
 794                 $input_params{'action'} ||= "shortlog";
 795                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 796                         $input_params{'hash_base'} ||= $refname;
 797                 } else {
 798                         $input_params{'hash'} ||= $refname;
 799                 }
 800         }
 801
 802         # next, handle the 'parent' part, if present
 803         if (defined $parentrefname) {
 804                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 805                 # someproject/blobdiff/oldrev..newrev:/filename
 806                 if ($parentpathname) {
 807                         $parentpathname =~ s,^/+,,;
 808                         $parentpathname =~ s,/$,,;
 809                         $input_params{'file_parent'} ||= $parentpathname;
 810                 } else {
 811                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 812                 }
 813                 # we assume that hash_parent_base is wanted if a path was specified,
 814                 # or if the action wants hash_base instead of hash
 815                 if (defined $input_params{'file_parent'} ||
 816                         grep { $_ eq $input_params{'action'} } @wants_base) {
 817                         $input_params{'hash_parent_base'} ||= $parentrefname;
 818                 } else {
 819                         $input_params{'hash_parent'} ||= $parentrefname;
 820                 }
 821         }
 822
 823         # for the snapshot action, we allow URLs in the form
 824         # $project/snapshot/$hash.ext
 825         # where .ext determines the snapshot and gets removed from the
 826         # passed $refname to provide the $hash.
 827         #
 828         # To be able to tell that $refname includes the format extension, we
 829         # require the following two conditions to be satisfied:
 830         # - the hash input parameter MUST have been set from the $refname part
 831         #   of the URL (i.e. they must be equal)
 832         # - the snapshot format MUST NOT have been defined already (e.g. from
 833         #   CGI parameter sf)
 834         # It's also useless to try any matching unless $refname has a dot,
 835         # so we check for that too
 836         if (defined $input_params{'action'} &&
 837                 $input_params{'action'} eq 'snapshot' &&
 838                 defined $refname && index($refname, '.') != -1 &&
 839                 $refname eq $input_params{'hash'} &&
 840                 !defined $input_params{'snapshot_format'}) {
 841                 # We loop over the known snapshot formats, checking for
 842                 # extensions. Allowed extensions are both the defined suffix
 843                 # (which includes the initial dot already) and the snapshot
 844                 # format key itself, with a prepended dot
 845                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 846                         my $hash = $refname;
 847                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 848                                 next;
 849                         }
 850                         my $sfx = $1;
 851                         # a valid suffix was found, so set the snapshot format
 852                         # and reset the hash parameter
 853                         $input_params{'snapshot_format'} = $fmt;
 854                         $input_params{'hash'} = $hash;
 855                         # we also set the format suffix to the one requested
 856                         # in the URL: this way a request for e.g. .tgz returns
 857                         # a .tgz instead of a .tar.gz
 858                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 859                         last;
 860                 }
 861         }
 862 }
 863
 864 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 865      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 866      $searchtext, $search_regexp);
 867 sub evaluate_and_validate_params {
 868         our $action = $input_params{'action'};
 869         if (defined $action) {
 870                 if (!validate_action($action)) {
 871                         die_error(400, "Invalid action parameter");
 872                 }
 873         }
 874
 875         # parameters which are pathnames
 876         our $project = $input_params{'project'};
 877         if (defined $project) {
 878                 if (!validate_project($project)) {
 879                         undef $project;
 880                         die_error(404, "No such project");
 881                 }
 882         }
 883
 884         our $file_name = $input_params{'file_name'};
 885         if (defined $file_name) {
 886                 if (!validate_pathname($file_name)) {
 887                         die_error(400, "Invalid file parameter");
 888                 }
 889         }
 890
 891         our $file_parent = $input_params{'file_parent'};
 892         if (defined $file_parent) {
 893                 if (!validate_pathname($file_parent)) {
 894                         die_error(400, "Invalid file parent parameter");
 895                 }
 896         }
 897
 898         # parameters which are refnames
 899         our $hash = $input_params{'hash'};
 900         if (defined $hash) {
 901                 if (!validate_refname($hash)) {
 902                         die_error(400, "Invalid hash parameter");
 903                 }
 904         }
 905
 906         our $hash_parent = $input_params{'hash_parent'};
 907         if (defined $hash_parent) {
 908                 if (!validate_refname($hash_parent)) {
 909                         die_error(400, "Invalid hash parent parameter");
 910                 }
 911         }
 912
 913         our $hash_base = $input_params{'hash_base'};
 914         if (defined $hash_base) {
 915                 if (!validate_refname($hash_base)) {
 916                         die_error(400, "Invalid hash base parameter");
 917                 }
 918         }
 919
 920         our @extra_options = @{$input_params{'extra_options'}};
 921         # @extra_options is always defined, since it can only be (currently) set from
 922         # CGI, and $cgi->param() returns the empty array in array context if the param
 923         # is not set
 924         foreach my $opt (@extra_options) {
 925                 if (not exists $allowed_options{$opt}) {
 926                         die_error(400, "Invalid option parameter");
 927                 }
 928                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 929                         die_error(400, "Invalid option parameter for this action");
 930                 }
 931         }
 932
 933         our $hash_parent_base = $input_params{'hash_parent_base'};
 934         if (defined $hash_parent_base) {
 935                 if (!validate_refname($hash_parent_base)) {
 936                         die_error(400, "Invalid hash parent base parameter");
 937                 }
 938         }
 939
 940         # other parameters
 941         our $page = $input_params{'page'};
 942         if (defined $page) {
 943                 if ($page =~ m/[^0-9]/) {
 944                         die_error(400, "Invalid page parameter");
 945                 }
 946         }
 947
 948         our $searchtype = $input_params{'searchtype'};
 949         if (defined $searchtype) {
 950                 if ($searchtype =~ m/[^a-z]/) {
 951                         die_error(400, "Invalid searchtype parameter");
 952                 }
 953         }
 954
 955         our $search_use_regexp = $input_params{'search_use_regexp'};
 956
 957         our $searchtext = $input_params{'searchtext'};
 958         our $search_regexp;
 959         if (defined $searchtext) {
 960                 if (length($searchtext) < 2) {
 961                         die_error(403, "At least two characters are required for search parameter");
 962                 }
 963                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 964         }
 965 }
 966
 967 # path to the current git repository
 968 our $git_dir;
 969 sub evaluate_git_dir {
 970         our $git_dir = "$projectroot/$project" if $project;
 971 }
 972
 973 our (@snapshot_fmts, $git_avatar);
 974 sub configure_gitweb_features {
 975         # list of supported snapshot formats
 976         our @snapshot_fmts = gitweb_get_feature('snapshot');
 977         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 978
 979         # check that the avatar feature is set to a known provider name,
 980         # and for each provider check if the dependencies are satisfied.
 981         # if the provider name is invalid or the dependencies are not met,
 982         # reset $git_avatar to the empty string.
 983         our ($git_avatar) = gitweb_get_feature('avatar');
 984         if ($git_avatar eq 'gravatar') {
 985                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 986         } elsif ($git_avatar eq 'picon') {
 987                 # no dependencies
 988         } else {
 989                 $git_avatar = '';
 990         }
 991 }
 992
 993 # custom error handler: 'die <message>' is Internal Server Error
 994 sub handle_errors_html {
 995         my $msg = shift; # it is already HTML escaped
 996
 997         # to avoid infinite loop where error occurs in die_error,
 998         # change handler to default handler, disabling handle_errors_html
 999         set_message("Error occured when inside die_error:\n$msg");
1000
1001         # you cannot jump out of die_error when called as error handler;
1002         # the subroutine set via CGI::Carp::set_message is called _after_
1003         # HTTP headers are already written, so it cannot write them itself
1004         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1005 }
1006 set_message(\&handle_errors_html);
1007
1008 # dispatch
1009 sub dispatch {
1010         if (!defined $action) {
1011                 if (defined $hash) {
1012                         $action = git_get_type($hash);
1013                 } elsif (defined $hash_base && defined $file_name) {
1014                         $action = git_get_type("$hash_base:$file_name");
1015                 } elsif (defined $project) {
1016                         $action = 'summary';
1017                 } else {
1018                         $action = 'project_list';
1019                 }
1020         }
1021         if (!defined($actions{$action})) {
1022                 die_error(400, "Unknown action");
1023         }
1024         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1025             !$project) {
1026                 die_error(400, "Project needed");
1027         }
1028         $actions{$action}->();
1029 }
1030
1031 sub run {
1032         our $t0 = [Time::HiRes::gettimeofday()]
1033                 if defined $t0;
1034
1035         evaluate_uri();
1036         evaluate_gitweb_config();
1037         evaluate_git_version();
1038         check_loadavg();
1039
1040         # $projectroot and $projects_list might be set in gitweb config file
1041         $projects_list ||= $projectroot;
1042
1043         evaluate_query_params();
1044         evaluate_path_info();
1045         evaluate_and_validate_params();
1046         evaluate_git_dir();
1047
1048         configure_gitweb_features();
1049
1050         dispatch();
1051
1052  DONE_GITWEB:
1053         1;
1054 }
1055 our $cgi = CGI->new();
1056 run();
1057
1058 ## ======================================================================
1059 ## action links
1060
1061 # possible values of extra options
1062 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1063 # -replay => 1      - start from a current view (replay with modifications)
1064 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1065 sub href {
1066         my %params = @_;
1067         # default is to use -absolute url() i.e. $my_uri
1068         my $href = $params{-full} ? $my_url : $my_uri;
1069
1070         $params{'project'} = $project unless exists $params{'project'};
1071
1072         if ($params{-replay}) {
1073                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1074                         if (!exists $params{$name}) {
1075                                 $params{$name} = $input_params{$name};
1076                         }
1077                 }
1078         }
1079
1080         my $use_pathinfo = gitweb_check_feature('pathinfo');
1081         if (defined $params{'project'} &&
1082             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1083                 # try to put as many parameters as possible in PATH_INFO:
1084                 #   - project name
1085                 #   - action
1086                 #   - hash_parent or hash_parent_base:/file_parent
1087                 #   - hash or hash_base:/filename
1088                 #   - the snapshot_format as an appropriate suffix
1089
1090                 # When the script is the root DirectoryIndex for the domain,
1091                 # $href here would be something like http://gitweb.example.com/
1092                 # Thus, we strip any trailing / from $href, to spare us double
1093                 # slashes in the final URL
1094                 $href =~ s,/$,,;
1095
1096                 # Then add the project name, if present
1097                 $href .= "/".esc_url($params{'project'});
1098                 delete $params{'project'};
1099
1100                 # since we destructively absorb parameters, we keep this
1101                 # boolean that remembers if we're handling a snapshot
1102                 my $is_snapshot = $params{'action'} eq 'snapshot';
1103
1104                 # Summary just uses the project path URL, any other action is
1105                 # added to the URL
1106                 if (defined $params{'action'}) {
1107                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1108                         delete $params{'action'};
1109                 }
1110
1111                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1112                 # stripping nonexistent or useless pieces
1113                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1114                         || $params{'hash_parent'} || $params{'hash'});
1115                 if (defined $params{'hash_base'}) {
1116                         if (defined $params{'hash_parent_base'}) {
1117                                 $href .= esc_url($params{'hash_parent_base'});
1118                                 # skip the file_parent if it's the same as the file_name
1119                                 if (defined $params{'file_parent'}) {
1120                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1121                                                 delete $params{'file_parent'};
1122                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1123                                                 $href .= ":/".esc_url($params{'file_parent'});
1124                                                 delete $params{'file_parent'};
1125                                         }
1126                                 }
1127                                 $href .= "..";
1128                                 delete $params{'hash_parent'};
1129                                 delete $params{'hash_parent_base'};
1130                         } elsif (defined $params{'hash_parent'}) {
1131                                 $href .= esc_url($params{'hash_parent'}). "..";
1132                                 delete $params{'hash_parent'};
1133                         }
1134
1135                         $href .= esc_url($params{'hash_base'});
1136                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1137                                 $href .= ":/".esc_url($params{'file_name'});
1138                                 delete $params{'file_name'};
1139                         }
1140                         delete $params{'hash'};
1141                         delete $params{'hash_base'};
1142                 } elsif (defined $params{'hash'}) {
1143                         $href .= esc_url($params{'hash'});
1144                         delete $params{'hash'};
1145                 }
1146
1147                 # If the action was a snapshot, we can absorb the
1148                 # snapshot_format parameter too
1149                 if ($is_snapshot) {
1150                         my $fmt = $params{'snapshot_format'};
1151                         # snapshot_format should always be defined when href()
1152                         # is called, but just in case some code forgets, we
1153                         # fall back to the default
1154                         $fmt ||= $snapshot_fmts[0];
1155                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1156                         delete $params{'snapshot_format'};
1157                 }
1158         }
1159
1160         # now encode the parameters explicitly
1161         my @result = ();
1162         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1163                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1164                 if (defined $params{$name}) {
1165                         if (ref($params{$name}) eq "ARRAY") {
1166                                 foreach my $par (@{$params{$name}}) {
1167                                         push @result, $symbol . "=" . esc_param($par);
1168                                 }
1169                         } else {
1170                                 push @result, $symbol . "=" . esc_param($params{$name});
1171                         }
1172                 }
1173         }
1174         $href .= "?" . join(';', @result) if scalar @result;
1175
1176         return $href;
1177 }
1178
1179
1180 ## ======================================================================
1181 ## validation, quoting/unquoting and escaping
1182
1183 sub validate_action {
1184         my $input = shift || return undef;
1185         return undef unless exists $actions{$input};
1186         return $input;
1187 }
1188
1189 sub validate_project {
1190         my $input = shift || return undef;
1191         if (!validate_pathname($input) ||
1192                 !(-d "$projectroot/$input") ||
1193                 !check_export_ok("$projectroot/$input") ||
1194                 ($strict_export && !project_in_list($input))) {
1195                 return undef;
1196         } else {
1197                 return $input;
1198         }
1199 }
1200
1201 sub validate_pathname {
1202         my $input = shift || return undef;
1203
1204         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1205         # at the beginning, at the end, and between slashes.
1206         # also this catches doubled slashes
1207         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1208                 return undef;
1209         }
1210         # no null characters
1211         if ($input =~ m!\0!) {
1212                 return undef;
1213         }
1214         return $input;
1215 }
1216
1217 sub validate_refname {
1218         my $input = shift || return undef;
1219
1220         # textual hashes are O.K.
1221         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1222                 return $input;
1223         }
1224         # it must be correct pathname
1225         $input = validate_pathname($input)
1226                 or return undef;
1227         # restrictions on ref name according to git-check-ref-format
1228         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1229                 return undef;
1230         }
1231         return $input;
1232 }
1233
1234 # decode sequences of octets in utf8 into Perl's internal form,
1235 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1236 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1237 sub to_utf8 {
1238         my $str = shift;
1239         return undef unless defined $str;
1240         if (utf8::valid($str)) {
1241                 utf8::decode($str);
1242                 return $str;
1243         } else {
1244                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1245         }
1246 }
1247
1248 # quote unsafe chars, but keep the slash, even when it's not
1249 # correct, but quoted slashes look too horrible in bookmarks
1250 sub esc_param {
1251         my $str = shift;
1252         return undef unless defined $str;
1253         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1254         $str =~ s/ /\+/g;
1255         return $str;
1256 }
1257
1258 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1259 sub esc_url {
1260         my $str = shift;
1261         return undef unless defined $str;
1262         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1263         $str =~ s/\+/%2B/g;
1264         $str =~ s/ /\+/g;
1265         return $str;
1266 }
1267
1268 # replace invalid utf8 character with SUBSTITUTION sequence
1269 sub esc_html {
1270         my $str = shift;
1271         my %opts = @_;
1272
1273         return undef unless defined $str;
1274
1275         $str = to_utf8($str);
1276         $str = $cgi->escapeHTML($str);
1277         if ($opts{'-nbsp'}) {
1278                 $str =~ s/ /&nbsp;/g;
1279         }
1280         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1281         return $str;
1282 }
1283
1284 # quote control characters and escape filename to HTML
1285 sub esc_path {
1286         my $str = shift;
1287         my %opts = @_;
1288
1289         return undef unless defined $str;
1290
1291         $str = to_utf8($str);
1292         $str = $cgi->escapeHTML($str);
1293         if ($opts{'-nbsp'}) {
1294                 $str =~ s/ /&nbsp;/g;
1295         }
1296         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1297         return $str;
1298 }
1299
1300 # Make control characters "printable", using character escape codes (CEC)
1301 sub quot_cec {
1302         my $cntrl = shift;
1303         my %opts = @_;
1304         my %es = ( # character escape codes, aka escape sequences
1305                 "\t" => '\t',   # tab            (HT)
1306                 "\n" => '\n',   # line feed      (LF)
1307                 "\r" => '\r',   # carrige return (CR)
1308                 "\f" => '\f',   # form feed      (FF)
1309                 "\b" => '\b',   # backspace      (BS)
1310                 "\a" => '\a',   # alarm (bell)   (BEL)
1311                 "\e" => '\e',   # escape         (ESC)
1312                 "\013" => '\v', # vertical tab   (VT)
1313                 "\000" => '\0', # nul character  (NUL)
1314         );
1315         my $chr = ( (exists $es{$cntrl})
1316                     ? $es{$cntrl}
1317                     : sprintf('\%2x', ord($cntrl)) );
1318         if ($opts{-nohtml}) {
1319                 return $chr;
1320         } else {
1321                 return "<span class=\"cntrl\">$chr</span>";
1322         }
1323 }
1324
1325 # Alternatively use unicode control pictures codepoints,
1326 # Unicode "printable representation" (PR)
1327 sub quot_upr {
1328         my $cntrl = shift;
1329         my %opts = @_;
1330
1331         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1332         if ($opts{-nohtml}) {
1333                 return $chr;
1334         } else {
1335                 return "<span class=\"cntrl\">$chr</span>";
1336         }
1337 }
1338
1339 # git may return quoted and escaped filenames
1340 sub unquote {
1341         my $str = shift;
1342
1343         sub unq {
1344                 my $seq = shift;
1345                 my %es = ( # character escape codes, aka escape sequences
1346                         't' => "\t",   # tab            (HT, TAB)
1347                         'n' => "\n",   # newline        (NL)
1348                         'r' => "\r",   # return         (CR)
1349                         'f' => "\f",   # form feed      (FF)
1350                         'b' => "\b",   # backspace      (BS)
1351                         'a' => "\a",   # alarm (bell)   (BEL)
1352                         'e' => "\e",   # escape         (ESC)
1353                         'v' => "\013", # vertical tab   (VT)
1354                 );
1355
1356                 if ($seq =~ m/^[0-7]{1,3}$/) {
1357                         # octal char sequence
1358                         return chr(oct($seq));
1359                 } elsif (exists $es{$seq}) {
1360                         # C escape sequence, aka character escape code
1361                         return $es{$seq};
1362                 }
1363                 # quoted ordinary character
1364                 return $seq;
1365         }
1366
1367         if ($str =~ m/^"(.*)"$/) {
1368                 # needs unquoting
1369                 $str = $1;
1370                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1371         }
1372         return $str;
1373 }
1374
1375 # escape tabs (convert tabs to spaces)
1376 sub untabify {
1377         my $line = shift;
1378
1379         while ((my $pos = index($line, "\t")) != -1) {
1380                 if (my $count = (8 - ($pos % 8))) {
1381                         my $spaces = ' ' x $count;
1382                         $line =~ s/\t/$spaces/;
1383                 }
1384         }
1385
1386         return $line;
1387 }
1388
1389 sub project_in_list {
1390         my $project = shift;
1391         my @list = git_get_projects_list();
1392         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1393 }
1394
1395 ## ----------------------------------------------------------------------
1396 ## HTML aware string manipulation
1397
1398 # Try to chop given string on a word boundary between position
1399 # $len and $len+$add_len. If there is no word boundary there,
1400 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1401 # (marking chopped part) would be longer than given string.
1402 sub chop_str {
1403         my $str = shift;
1404         my $len = shift;
1405         my $add_len = shift || 10;
1406         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1407
1408         # Make sure perl knows it is utf8 encoded so we don't
1409         # cut in the middle of a utf8 multibyte char.
1410         $str = to_utf8($str);
1411
1412         # allow only $len chars, but don't cut a word if it would fit in $add_len
1413         # if it doesn't fit, cut it if it's still longer than the dots we would add
1414         # remove chopped character entities entirely
1415
1416         # when chopping in the middle, distribute $len into left and right part
1417         # return early if chopping wouldn't make string shorter
1418         if ($where eq 'center') {
1419                 return $str if ($len + 5 >= length($str)); # filler is length 5
1420                 $len = int($len/2);
1421         } else {
1422                 return $str if ($len + 4 >= length($str)); # filler is length 4
1423         }
1424
1425         # regexps: ending and beginning with word part up to $add_len
1426         my $endre = qr/.{$len}\w{0,$add_len}/;
1427         my $begre = qr/\w{0,$add_len}.{$len}/;
1428
1429         if ($where eq 'left') {
1430                 $str =~ m/^(.*?)($begre)$/;
1431                 my ($lead, $body) = ($1, $2);
1432                 if (length($lead) > 4) {
1433                         $lead = " ...";
1434                 }
1435                 return "$lead$body";
1436
1437         } elsif ($where eq 'center') {
1438                 $str =~ m/^($endre)(.*)$/;
1439                 my ($left, $str)  = ($1, $2);
1440                 $str =~ m/^(.*?)($begre)$/;
1441                 my ($mid, $right) = ($1, $2);
1442                 if (length($mid) > 5) {
1443                         $mid = " ... ";
1444                 }
1445                 return "$left$mid$right";
1446
1447         } else {
1448                 $str =~ m/^($endre)(.*)$/;
1449                 my $body = $1;
1450                 my $tail = $2;
1451                 if (length($tail) > 4) {
1452                         $tail = "... ";
1453                 }
1454                 return "$body$tail";
1455         }
1456 }
1457
1458 # takes the same arguments as chop_str, but also wraps a <span> around the
1459 # result with a title attribute if it does get chopped. Additionally, the
1460 # string is HTML-escaped.
1461 sub chop_and_escape_str {
1462         my ($str) = @_;
1463
1464         my $chopped = chop_str(@_);
1465         if ($chopped eq $str) {
1466                 return esc_html($chopped);
1467         } else {
1468                 $str =~ s/[[:cntrl:]]/?/g;
1469                 return $cgi->span({-title=>$str}, esc_html($chopped));
1470         }
1471 }
1472
1473 ## ----------------------------------------------------------------------
1474 ## functions returning short strings
1475
1476 # CSS class for given age value (in seconds)
1477 sub age_class {
1478         my $age = shift;
1479
1480         if (!defined $age) {
1481                 return "noage";
1482         } elsif ($age < 60*60*2) {
1483                 return "age0";
1484         } elsif ($age < 60*60*24*2) {
1485                 return "age1";
1486         } else {
1487                 return "age2";
1488         }
1489 }
1490
1491 # convert age in seconds to "nn units ago" string
1492 sub age_string {
1493         my $age = shift;
1494         my $age_str;
1495
1496         if ($age > 60*60*24*365*2) {
1497                 $age_str = (int $age/60/60/24/365);
1498                 $age_str .= " years ago";
1499         } elsif ($age > 60*60*24*(365/12)*2) {
1500                 $age_str = int $age/60/60/24/(365/12);
1501                 $age_str .= " months ago";
1502         } elsif ($age > 60*60*24*7*2) {
1503                 $age_str = int $age/60/60/24/7;
1504                 $age_str .= " weeks ago";
1505         } elsif ($age > 60*60*24*2) {
1506                 $age_str = int $age/60/60/24;
1507                 $age_str .= " days ago";
1508         } elsif ($age > 60*60*2) {
1509                 $age_str = int $age/60/60;
1510                 $age_str .= " hours ago";
1511         } elsif ($age > 60*2) {
1512                 $age_str = int $age/60;
1513                 $age_str .= " min ago";
1514         } elsif ($age > 2) {
1515                 $age_str = int $age;
1516                 $age_str .= " sec ago";
1517         } else {
1518                 $age_str .= " right now";
1519         }
1520         return $age_str;
1521 }
1522
1523 use constant {
1524         S_IFINVALID => 0030000,
1525         S_IFGITLINK => 0160000,
1526 };
1527
1528 # submodule/subproject, a commit object reference
1529 sub S_ISGITLINK {
1530         my $mode = shift;
1531
1532         return (($mode & S_IFMT) == S_IFGITLINK)
1533 }
1534
1535 # convert file mode in octal to symbolic file mode string
1536 sub mode_str {
1537         my $mode = oct shift;
1538
1539         if (S_ISGITLINK($mode)) {
1540                 return 'm---------';
1541         } elsif (S_ISDIR($mode & S_IFMT)) {
1542                 return 'drwxr-xr-x';
1543         } elsif (S_ISLNK($mode)) {
1544                 return 'lrwxrwxrwx';
1545         } elsif (S_ISREG($mode)) {
1546                 # git cares only about the executable bit
1547                 if ($mode & S_IXUSR) {
1548                         return '-rwxr-xr-x';
1549                 } else {
1550                         return '-rw-r--r--';
1551                 };
1552         } else {
1553                 return '----------';
1554         }
1555 }
1556
1557 # convert file mode in octal to file type string
1558 sub file_type {
1559         my $mode = shift;
1560
1561         if ($mode !~ m/^[0-7]+$/) {
1562                 return $mode;
1563         } else {
1564                 $mode = oct $mode;
1565         }
1566
1567         if (S_ISGITLINK($mode)) {
1568                 return "submodule";
1569         } elsif (S_ISDIR($mode & S_IFMT)) {
1570                 return "directory";
1571         } elsif (S_ISLNK($mode)) {
1572                 return "symlink";
1573         } elsif (S_ISREG($mode)) {
1574                 return "file";
1575         } else {
1576                 return "unknown";
1577         }
1578 }
1579
1580 # convert file mode in octal to file type description string
1581 sub file_type_long {
1582         my $mode = shift;
1583
1584         if ($mode !~ m/^[0-7]+$/) {
1585                 return $mode;
1586         } else {
1587                 $mode = oct $mode;
1588         }
1589
1590         if (S_ISGITLINK($mode)) {
1591                 return "submodule";
1592         } elsif (S_ISDIR($mode & S_IFMT)) {
1593                 return "directory";
1594         } elsif (S_ISLNK($mode)) {
1595                 return "symlink";
1596         } elsif (S_ISREG($mode)) {
1597                 if ($mode & S_IXUSR) {
1598                         return "executable";
1599                 } else {
1600                         return "file";
1601                 };
1602         } else {
1603                 return "unknown";
1604         }
1605 }
1606
1607
1608 ## ----------------------------------------------------------------------
1609 ## functions returning short HTML fragments, or transforming HTML fragments
1610 ## which don't belong to other sections
1611
1612 # format line of commit message.
1613 sub format_log_line_html {
1614         my $line = shift;
1615
1616         $line = esc_html($line, -nbsp=>1);
1617         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1618                 $cgi->a({-href => href(action=>"object", hash=>$1),
1619                                         -class => "text"}, $1);
1620         }eg;
1621
1622         return $line;
1623 }
1624
1625 # format marker of refs pointing to given object
1626
1627 # the destination action is chosen based on object type and current context:
1628 # - for annotated tags, we choose the tag view unless it's the current view
1629 #   already, in which case we go to shortlog view
1630 # - for other refs, we keep the current view if we're in history, shortlog or
1631 #   log view, and select shortlog otherwise
1632 sub format_ref_marker {
1633         my ($refs, $id) = @_;
1634         my $markers = '';
1635
1636         if (defined $refs->{$id}) {
1637                 foreach my $ref (@{$refs->{$id}}) {
1638                         # this code exploits the fact that non-lightweight tags are the
1639                         # only indirect objects, and that they are the only objects for which
1640                         # we want to use tag instead of shortlog as action
1641                         my ($type, $name) = qw();
1642                         my $indirect = ($ref =~ s/\^\{\}$//);
1643                         # e.g. tags/v2.6.11 or heads/next
1644                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1645                                 $type = $1;
1646                                 $name = $2;
1647                         } else {
1648                                 $type = "ref";
1649                                 $name = $ref;
1650                         }
1651
1652                         my $class = $type;
1653                         $class .= " indirect" if $indirect;
1654
1655                         my $dest_action = "shortlog";
1656
1657                         if ($indirect) {
1658                                 $dest_action = "tag" unless $action eq "tag";
1659                         } elsif ($action =~ /^(history|(short)?log)$/) {
1660                                 $dest_action = $action;
1661                         }
1662
1663                         my $dest = "";
1664                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1665                         $dest .= $ref;
1666
1667                         my $link = $cgi->a({
1668                                 -href => href(
1669                                         action=>$dest_action,
1670                                         hash=>$dest
1671                                 )}, $name);
1672
1673                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1674                                 $link . "</span>";
1675                 }
1676         }
1677
1678         if ($markers) {
1679                 return ' <span class="refs">'. $markers . '</span>';
1680         } else {
1681                 return "";
1682         }
1683 }
1684
1685 # format, perhaps shortened and with markers, title line
1686 sub format_subject_html {
1687         my ($long, $short, $href, $extra) = @_;
1688         $extra = '' unless defined($extra);
1689
1690         if (length($short) < length($long)) {
1691                 $long =~ s/[[:cntrl:]]/?/g;
1692                 return $cgi->a({-href => $href, -class => "list subject",
1693                                 -title => to_utf8($long)},
1694                        esc_html($short)) . $extra;
1695         } else {
1696                 return $cgi->a({-href => $href, -class => "list subject"},
1697                        esc_html($long)) . $extra;
1698         }
1699 }
1700
1701 # Rather than recomputing the url for an email multiple times, we cache it
1702 # after the first hit. This gives a visible benefit in views where the avatar
1703 # for the same email is used repeatedly (e.g. shortlog).
1704 # The cache is shared by all avatar engines (currently gravatar only), which
1705 # are free to use it as preferred. Since only one avatar engine is used for any
1706 # given page, there's no risk for cache conflicts.
1707 our %avatar_cache = ();
1708
1709 # Compute the picon url for a given email, by using the picon search service over at
1710 # http://www.cs.indiana.edu/picons/search.html
1711 sub picon_url {
1712         my $email = lc shift;
1713         if (!$avatar_cache{$email}) {
1714                 my ($user, $domain) = split('@', $email);
1715                 $avatar_cache{$email} =
1716                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1717                         "$domain/$user/" .
1718                         "users+domains+unknown/up/single";
1719         }
1720         return $avatar_cache{$email};
1721 }
1722
1723 # Compute the gravatar url for a given email, if it's not in the cache already.
1724 # Gravatar stores only the part of the URL before the size, since that's the
1725 # one computationally more expensive. This also allows reuse of the cache for
1726 # different sizes (for this particular engine).
1727 sub gravatar_url {
1728         my $email = lc shift;
1729         my $size = shift;
1730         $avatar_cache{$email} ||=
1731                 "http://www.gravatar.com/avatar/" .
1732                         Digest::MD5::md5_hex($email) . "?s=";
1733         return $avatar_cache{$email} . $size;
1734 }
1735
1736 # Insert an avatar for the given $email at the given $size if the feature
1737 # is enabled.
1738 sub git_get_avatar {
1739         my ($email, %opts) = @_;
1740         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1741         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1742         $opts{-size} ||= 'default';
1743         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1744         my $url = "";
1745         if ($git_avatar eq 'gravatar') {
1746                 $url = gravatar_url($email, $size);
1747         } elsif ($git_avatar eq 'picon') {
1748                 $url = picon_url($email);
1749         }
1750         # Other providers can be added by extending the if chain, defining $url
1751         # as needed. If no variant puts something in $url, we assume avatars
1752         # are completely disabled/unavailable.
1753         if ($url) {
1754                 return $pre_white .
1755                        "<img width=\"$size\" " .
1756                             "class=\"avatar\" " .
1757                             "src=\"$url\" " .
1758                             "alt=\"\" " .
1759                        "/>" . $post_white;
1760         } else {
1761                 return "";
1762         }
1763 }
1764
1765 sub format_search_author {
1766         my ($author, $searchtype, $displaytext) = @_;
1767         my $have_search = gitweb_check_feature('search');
1768
1769         if ($have_search) {
1770                 my $performed = "";
1771                 if ($searchtype eq 'author') {
1772                         $performed = "authored";
1773                 } elsif ($searchtype eq 'committer') {
1774                         $performed = "committed";
1775                 }
1776
1777                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1778                                 searchtext=>$author,
1779                                 searchtype=>$searchtype), class=>"list",
1780                                 title=>"Search for commits $performed by $author"},
1781                                 $displaytext);
1782
1783         } else {
1784                 return $displaytext;
1785         }
1786 }
1787
1788 # format the author name of the given commit with the given tag
1789 # the author name is chopped and escaped according to the other
1790 # optional parameters (see chop_str).
1791 sub format_author_html {
1792         my $tag = shift;
1793         my $co = shift;
1794         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1795         return "<$tag class=\"author\">" .
1796                format_search_author($co->{'author_name'}, "author",
1797                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1798                        $author) .
1799                "</$tag>";
1800 }
1801
1802 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1803 sub format_git_diff_header_line {
1804         my $line = shift;
1805         my $diffinfo = shift;
1806         my ($from, $to) = @_;
1807
1808         if ($diffinfo->{'nparents'}) {
1809                 # combined diff
1810                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1811                 if ($to->{'href'}) {
1812                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1813                                          esc_path($to->{'file'}));
1814                 } else { # file was deleted (no href)
1815                         $line .= esc_path($to->{'file'});
1816                 }
1817         } else {
1818                 # "ordinary" diff
1819                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1820                 if ($from->{'href'}) {
1821                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1822                                          'a/' . esc_path($from->{'file'}));
1823                 } else { # file was added (no href)
1824                         $line .= 'a/' . esc_path($from->{'file'});
1825                 }
1826                 $line .= ' ';
1827                 if ($to->{'href'}) {
1828                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1829                                          'b/' . esc_path($to->{'file'}));
1830                 } else { # file was deleted
1831                         $line .= 'b/' . esc_path($to->{'file'});
1832                 }
1833         }
1834
1835         return "<div class=\"diff header\">$line</div>\n";
1836 }
1837
1838 # format extended diff header line, before patch itself
1839 sub format_extended_diff_header_line {
1840         my $line = shift;
1841         my $diffinfo = shift;
1842         my ($from, $to) = @_;
1843
1844         # match <path>
1845         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1846                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1847                                        esc_path($from->{'file'}));
1848         }
1849         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1850                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1851                                  esc_path($to->{'file'}));
1852         }
1853         # match single <mode>
1854         if ($line =~ m/\s(\d{6})$/) {
1855                 $line .= '<span class="info"> (' .
1856                          file_type_long($1) .
1857                          ')</span>';
1858         }
1859         # match <hash>
1860         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1861                 # can match only for combined diff
1862                 $line = 'index ';
1863                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1864                         if ($from->{'href'}[$i]) {
1865                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1866                                                   -class=>"hash"},
1867                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1868                         } else {
1869                                 $line .= '0' x 7;
1870                         }
1871                         # separator
1872                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1873                 }
1874                 $line .= '..';
1875                 if ($to->{'href'}) {
1876                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1877                                          substr($diffinfo->{'to_id'},0,7));
1878                 } else {
1879                         $line .= '0' x 7;
1880                 }
1881
1882         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1883                 # can match only for ordinary diff
1884                 my ($from_link, $to_link);
1885                 if ($from->{'href'}) {
1886                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1887                                              substr($diffinfo->{'from_id'},0,7));
1888                 } else {
1889                         $from_link = '0' x 7;
1890                 }
1891                 if ($to->{'href'}) {
1892                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1893                                            substr($diffinfo->{'to_id'},0,7));
1894                 } else {
1895                         $to_link = '0' x 7;
1896                 }
1897                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1898                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1899         }
1900
1901         return $line . "<br/>\n";
1902 }
1903
1904 # format from-file/to-file diff header
1905 sub format_diff_from_to_header {
1906         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1907         my $line;
1908         my $result = '';
1909
1910         $line = $from_line;
1911         #assert($line =~ m/^---/) if DEBUG;
1912         # no extra formatting for "^--- /dev/null"
1913         if (! $diffinfo->{'nparents'}) {
1914                 # ordinary (single parent) diff
1915                 if ($line =~ m!^--- "?a/!) {
1916                         if ($from->{'href'}) {
1917                                 $line = '--- a/' .
1918                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1919                                                 esc_path($from->{'file'}));
1920                         } else {
1921                                 $line = '--- a/' .
1922                                         esc_path($from->{'file'});
1923                         }
1924                 }
1925                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1926
1927         } else {
1928                 # combined diff (merge commit)
1929                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1930                         if ($from->{'href'}[$i]) {
1931                                 $line = '--- ' .
1932                                         $cgi->a({-href=>href(action=>"blobdiff",
1933                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1934                                                              hash_parent_base=>$parents[$i],
1935                                                              file_parent=>$from->{'file'}[$i],
1936                                                              hash=>$diffinfo->{'to_id'},
1937                                                              hash_base=>$hash,
1938                                                              file_name=>$to->{'file'}),
1939                                                  -class=>"path",
1940                                                  -title=>"diff" . ($i+1)},
1941                                                 $i+1) .
1942                                         '/' .
1943                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1944                                                 esc_path($from->{'file'}[$i]));
1945                         } else {
1946                                 $line = '--- /dev/null';
1947                         }
1948                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1949                 }
1950         }
1951
1952         $line = $to_line;
1953         #assert($line =~ m/^\+\+\+/) if DEBUG;
1954         # no extra formatting for "^+++ /dev/null"
1955         if ($line =~ m!^\+\+\+ "?b/!) {
1956                 if ($to->{'href'}) {
1957                         $line = '+++ b/' .
1958                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1959                                         esc_path($to->{'file'}));
1960                 } else {
1961                         $line = '+++ b/' .
1962                                 esc_path($to->{'file'});
1963                 }
1964         }
1965         $result .= qq!<div class="diff to_file">$line</div>\n!;
1966
1967         return $result;
1968 }
1969
1970 # create note for patch simplified by combined diff
1971 sub format_diff_cc_simplified {
1972         my ($diffinfo, @parents) = @_;
1973         my $result = '';
1974
1975         $result .= "<div class=\"diff header\">" .
1976                    "diff --cc ";
1977         if (!is_deleted($diffinfo)) {
1978                 $result .= $cgi->a({-href => href(action=>"blob",
1979                                                   hash_base=>$hash,
1980                                                   hash=>$diffinfo->{'to_id'},
1981                                                   file_name=>$diffinfo->{'to_file'}),
1982                                     -class => "path"},
1983                                    esc_path($diffinfo->{'to_file'}));
1984         } else {
1985                 $result .= esc_path($diffinfo->{'to_file'});
1986         }
1987         $result .= "</div>\n" . # class="diff header"
1988                    "<div class=\"diff nodifferences\">" .
1989                    "Simple merge" .
1990                    "</div>\n"; # class="diff nodifferences"
1991
1992         return $result;
1993 }
1994
1995 # format patch (diff) line (not to be used for diff headers)
1996 sub format_diff_line {
1997         my $line = shift;
1998         my ($from, $to) = @_;
1999         my $diff_class = "";
2000
2001         chomp $line;
2002
2003         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2004                 # combined diff
2005                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2006                 if ($line =~ m/^\@{3}/) {
2007                         $diff_class = " chunk_header";
2008                 } elsif ($line =~ m/^\\/) {
2009                         $diff_class = " incomplete";
2010                 } elsif ($prefix =~ tr/+/+/) {
2011                         $diff_class = " add";
2012                 } elsif ($prefix =~ tr/-/-/) {
2013                         $diff_class = " rem";
2014                 }
2015         } else {
2016                 # assume ordinary diff
2017                 my $char = substr($line, 0, 1);
2018                 if ($char eq '+') {
2019                         $diff_class = " add";
2020                 } elsif ($char eq '-') {
2021                         $diff_class = " rem";
2022                 } elsif ($char eq '@') {
2023                         $diff_class = " chunk_header";
2024                 } elsif ($char eq "\\") {
2025                         $diff_class = " incomplete";
2026                 }
2027         }
2028         $line = untabify($line);
2029         if ($from && $to && $line =~ m/^\@{2} /) {
2030                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2031                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2032
2033                 $from_lines = 0 unless defined $from_lines;
2034                 $to_lines   = 0 unless defined $to_lines;
2035
2036                 if ($from->{'href'}) {
2037                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2038                                              -class=>"list"}, $from_text);
2039                 }
2040                 if ($to->{'href'}) {
2041                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2042                                              -class=>"list"}, $to_text);
2043                 }
2044                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2045                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2046                 return "<div class=\"diff$diff_class\">$line</div>\n";
2047         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2048                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2049                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2050
2051                 @from_text = split(' ', $ranges);
2052                 for (my $i = 0; $i < @from_text; ++$i) {
2053                         ($from_start[$i], $from_nlines[$i]) =
2054                                 (split(',', substr($from_text[$i], 1)), 0);
2055                 }
2056
2057                 $to_text   = pop @from_text;
2058                 $to_start  = pop @from_start;
2059                 $to_nlines = pop @from_nlines;
2060
2061                 $line = "<span class=\"chunk_info\">$prefix ";
2062                 for (my $i = 0; $i < @from_text; ++$i) {
2063                         if ($from->{'href'}[$i]) {
2064                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2065                                                   -class=>"list"}, $from_text[$i]);
2066                         } else {
2067                                 $line .= $from_text[$i];
2068                         }
2069                         $line .= " ";
2070                 }
2071                 if ($to->{'href'}) {
2072                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2073                                           -class=>"list"}, $to_text);
2074                 } else {
2075                         $line .= $to_text;
2076                 }
2077                 $line .= " $prefix</span>" .
2078                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2079                 return "<div class=\"diff$diff_class\">$line</div>\n";
2080         }
2081         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2082 }
2083
2084 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2085 # linked.  Pass the hash of the tree/commit to snapshot.
2086 sub format_snapshot_links {
2087         my ($hash) = @_;
2088         my $num_fmts = @snapshot_fmts;
2089         if ($num_fmts > 1) {
2090                 # A parenthesized list of links bearing format names.
2091                 # e.g. "snapshot (_tar.gz_ _zip_)"
2092                 return "snapshot (" . join(' ', map
2093                         $cgi->a({
2094                                 -href => href(
2095                                         action=>"snapshot",
2096                                         hash=>$hash,
2097                                         snapshot_format=>$_
2098                                 )
2099                         }, $known_snapshot_formats{$_}{'display'})
2100                 , @snapshot_fmts) . ")";
2101         } elsif ($num_fmts == 1) {
2102                 # A single "snapshot" link whose tooltip bears the format name.
2103                 # i.e. "_snapshot_"
2104                 my ($fmt) = @snapshot_fmts;
2105                 return
2106                         $cgi->a({
2107                                 -href => href(
2108                                         action=>"snapshot",
2109                                         hash=>$hash,
2110                                         snapshot_format=>$fmt
2111                                 ),
2112                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2113                         }, "snapshot");
2114         } else { # $num_fmts == 0
2115                 return undef;
2116         }
2117 }
2118
2119 ## ......................................................................
2120 ## functions returning values to be passed, perhaps after some
2121 ## transformation, to other functions; e.g. returning arguments to href()
2122
2123 # returns hash to be passed to href to generate gitweb URL
2124 # in -title key it returns description of link
2125 sub get_feed_info {
2126         my $format = shift || 'Atom';
2127         my %res = (action => lc($format));
2128
2129         # feed links are possible only for project views
2130         return unless (defined $project);
2131         # some views should link to OPML, or to generic project feed,
2132         # or don't have specific feed yet (so they should use generic)
2133         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2134
2135         my $branch;
2136         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2137         # from tag links; this also makes possible to detect branch links
2138         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2139             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2140                 $branch = $1;
2141         }
2142         # find log type for feed description (title)
2143         my $type = 'log';
2144         if (defined $file_name) {
2145                 $type  = "history of $file_name";
2146                 $type .= "/" if ($action eq 'tree');
2147                 $type .= " on '$branch'" if (defined $branch);
2148         } else {
2149                 $type = "log of $branch" if (defined $branch);
2150         }
2151
2152         $res{-title} = $type;
2153         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2154         $res{'file_name'} = $file_name;
2155
2156         return %res;
2157 }
2158
2159 ## ----------------------------------------------------------------------
2160 ## git utility subroutines, invoking git commands
2161
2162 # returns path to the core git executable and the --git-dir parameter as list
2163 sub git_cmd {
2164         $number_of_git_cmds++;
2165         return $GIT, '--git-dir='.$git_dir;
2166 }
2167
2168 # quote the given arguments for passing them to the shell
2169 # quote_command("command", "arg 1", "arg with ' and ! characters")
2170 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2171 # Try to avoid using this function wherever possible.
2172 sub quote_command {
2173         return join(' ',
2174                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2175 }
2176
2177 # get HEAD ref of given project as hash
2178 sub git_get_head_hash {
2179         return git_get_full_hash(shift, 'HEAD');
2180 }
2181
2182 sub git_get_full_hash {
2183         return git_get_hash(@_);
2184 }
2185
2186 sub git_get_short_hash {
2187         return git_get_hash(@_, '--short=7');
2188 }
2189
2190 sub git_get_hash {
2191         my ($project, $hash, @options) = @_;
2192         my $o_git_dir = $git_dir;
2193         my $retval = undef;
2194         $git_dir = "$projectroot/$project";
2195         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2196             '--verify', '-q', @options, $hash) {
2197                 $retval = <$fd>;
2198                 chomp $retval if defined $retval;
2199                 close $fd;
2200         }
2201         if (defined $o_git_dir) {
2202                 $git_dir = $o_git_dir;
2203         }
2204         return $retval;
2205 }
2206
2207 # get type of given object
2208 sub git_get_type {
2209         my $hash = shift;
2210
2211         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2212         my $type = <$fd>;
2213         close $fd or return;
2214         chomp $type;
2215         return $type;
2216 }
2217
2218 # repository configuration
2219 our $config_file = '';
2220 our %config;
2221
2222 # store multiple values for single key as anonymous array reference
2223 # single values stored directly in the hash, not as [ <value> ]
2224 sub hash_set_multi {
2225         my ($hash, $key, $value) = @_;
2226
2227         if (!exists $hash->{$key}) {
2228                 $hash->{$key} = $value;
2229         } elsif (!ref $hash->{$key}) {
2230                 $hash->{$key} = [ $hash->{$key}, $value ];
2231         } else {
2232                 push @{$hash->{$key}}, $value;
2233         }
2234 }
2235
2236 # return hash of git project configuration
2237 # optionally limited to some section, e.g. 'gitweb'
2238 sub git_parse_project_config {
2239         my $section_regexp = shift;
2240         my %config;
2241
2242         local $/ = "\0";
2243
2244         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2245                 or return;
2246
2247         while (my $keyval = <$fh>) {
2248                 chomp $keyval;
2249                 my ($key, $value) = split(/\n/, $keyval, 2);
2250
2251                 hash_set_multi(\%config, $key, $value)
2252                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2253         }
2254         close $fh;
2255
2256         return %config;
2257 }
2258
2259 # convert config value to boolean: 'true' or 'false'
2260 # no value, number > 0, 'true' and 'yes' values are true
2261 # rest of values are treated as false (never as error)
2262 sub config_to_bool {
2263         my $val = shift;
2264
2265         return 1 if !defined $val;             # section.key
2266
2267         # strip leading and trailing whitespace
2268         $val =~ s/^\s+//;
2269         $val =~ s/\s+$//;
2270
2271         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2272                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2273 }
2274
2275 # convert config value to simple decimal number
2276 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2277 # to be multiplied by 1024, 1048576, or 1073741824
2278 sub config_to_int {
2279         my $val = shift;
2280
2281         # strip leading and trailing whitespace
2282         $val =~ s/^\s+//;
2283         $val =~ s/\s+$//;
2284
2285         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2286                 $unit = lc($unit);
2287                 # unknown unit is treated as 1
2288                 return $num * ($unit eq 'g' ? 1073741824 :
2289                                $unit eq 'm' ?    1048576 :
2290                                $unit eq 'k' ?       1024 : 1);
2291         }
2292         return $val;
2293 }
2294
2295 # convert config value to array reference, if needed
2296 sub config_to_multi {
2297         my $val = shift;
2298
2299         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2300 }
2301
2302 sub git_get_project_config {
2303         my ($key, $type) = @_;
2304
2305         return unless defined $git_dir;
2306
2307         # key sanity check
2308         return unless ($key);
2309         $key =~ s/^gitweb\.//;
2310         return if ($key =~ m/\W/);
2311
2312         # type sanity check
2313         if (defined $type) {
2314                 $type =~ s/^--//;
2315                 $type = undef
2316                         unless ($type eq 'bool' || $type eq 'int');
2317         }
2318
2319         # get config
2320         if (!defined $config_file ||
2321             $config_file ne "$git_dir/config") {
2322                 %config = git_parse_project_config('gitweb');
2323                 $config_file = "$git_dir/config";
2324         }
2325
2326         # check if config variable (key) exists
2327         return unless exists $config{"gitweb.$key"};
2328
2329         # ensure given type
2330         if (!defined $type) {
2331                 return $config{"gitweb.$key"};
2332         } elsif ($type eq 'bool') {
2333                 # backward compatibility: 'git config --bool' returns true/false
2334                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2335         } elsif ($type eq 'int') {
2336                 return config_to_int($config{"gitweb.$key"});
2337         }
2338         return $config{"gitweb.$key"};
2339 }
2340
2341 # get hash of given path at given ref
2342 sub git_get_hash_by_path {
2343         my $base = shift;
2344         my $path = shift || return undef;
2345         my $type = shift;
2346
2347         $path =~ s,/+$,,;
2348
2349         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2350                 or die_error(500, "Open git-ls-tree failed");
2351         my $line = <$fd>;
2352         close $fd or return undef;
2353
2354         if (!defined $line) {
2355                 # there is no tree or hash given by $path at $base
2356                 return undef;
2357         }
2358
2359         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2360         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2361         if (defined $type && $type ne $2) {
2362                 # type doesn't match
2363                 return undef;
2364         }
2365         return $3;
2366 }
2367
2368 # get path of entry with given hash at given tree-ish (ref)
2369 # used to get 'from' filename for combined diff (merge commit) for renames
2370 sub git_get_path_by_hash {
2371         my $base = shift || return;
2372         my $hash = shift || return;
2373
2374         local $/ = "\0";
2375
2376         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2377                 or return undef;
2378         while (my $line = <$fd>) {
2379                 chomp $line;
2380
2381                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2382                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2383                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2384                         close $fd;
2385                         return $1;
2386                 }
2387         }
2388         close $fd;
2389         return undef;
2390 }
2391
2392 ## ......................................................................
2393 ## git utility functions, directly accessing git repository
2394
2395 sub git_get_project_description {
2396         my $path = shift;
2397
2398         $git_dir = "$projectroot/$path";
2399         open my $fd, '<', "$git_dir/description"
2400                 or return git_get_project_config('description');
2401         my $descr = <$fd>;
2402         close $fd;
2403         if (defined $descr) {
2404                 chomp $descr;
2405         }
2406         return $descr;
2407 }
2408
2409 sub git_get_project_ctags {
2410         my $path = shift;
2411         my $ctags = {};
2412
2413         $git_dir = "$projectroot/$path";
2414         opendir my $dh, "$git_dir/ctags"
2415                 or return $ctags;
2416         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2417                 open my $ct, '<', $_ or next;
2418                 my $val = <$ct>;
2419                 chomp $val;
2420                 close $ct;
2421                 my $ctag = $_; $ctag =~ s#.*/##;
2422                 $ctags->{$ctag} = $val;
2423         }
2424         closedir $dh;
2425         $ctags;
2426 }
2427
2428 sub git_populate_project_tagcloud {
2429         my $ctags = shift;
2430
2431         # First, merge different-cased tags; tags vote on casing
2432         my %ctags_lc;
2433         foreach (keys %$ctags) {
2434                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2435                 if (not $ctags_lc{lc $_}->{topcount}
2436                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2437                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2438                         $ctags_lc{lc $_}->{topname} = $_;
2439                 }
2440         }
2441
2442         my $cloud;
2443         if (eval { require HTML::TagCloud; 1; }) {
2444                 $cloud = HTML::TagCloud->new;
2445                 foreach (sort keys %ctags_lc) {
2446                         # Pad the title with spaces so that the cloud looks
2447                         # less crammed.
2448                         my $title = $ctags_lc{$_}->{topname};
2449                         $title =~ s/ /&nbsp;/g;
2450                         $title =~ s/^/&nbsp;/g;
2451                         $title =~ s/$/&nbsp;/g;
2452                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2453                 }
2454         } else {
2455                 $cloud = \%ctags_lc;
2456         }
2457         $cloud;
2458 }
2459
2460 sub git_show_project_tagcloud {
2461         my ($cloud, $count) = @_;
2462         print STDERR ref($cloud)."..\n";
2463         if (ref $cloud eq 'HTML::TagCloud') {
2464                 return $cloud->html_and_css($count);
2465         } else {
2466                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2467                 return '<p align="center">' . join (', ', map {
2468                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2469                 } splice(@tags, 0, $count)) . '</p>';
2470         }
2471 }
2472
2473 sub git_get_project_url_list {
2474         my $path = shift;
2475
2476         $git_dir = "$projectroot/$path";
2477         open my $fd, '<', "$git_dir/cloneurl"
2478                 or return wantarray ?
2479                 @{ config_to_multi(git_get_project_config('url')) } :
2480                    config_to_multi(git_get_project_config('url'));
2481         my @git_project_url_list = map { chomp; $_ } <$fd>;
2482         close $fd;
2483
2484         return wantarray ? @git_project_url_list : \@git_project_url_list;
2485 }
2486
2487 sub git_get_projects_list {
2488         my ($filter) = @_;
2489         my @list;
2490
2491         $filter ||= '';
2492         $filter =~ s/\.git$//;
2493
2494         my $check_forks = gitweb_check_feature('forks');
2495
2496         if (-d $projects_list) {
2497                 # search in directory
2498                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2499                 # remove the trailing "/"
2500                 $dir =~ s!/+$!!;
2501                 my $pfxlen = length("$dir");
2502                 my $pfxdepth = ($dir =~ tr!/!!);
2503
2504                 File::Find::find({
2505                         follow_fast => 1, # follow symbolic links
2506                         follow_skip => 2, # ignore duplicates
2507                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2508                         wanted => sub {
2509                                 # global variables
2510                                 our $project_maxdepth;
2511                                 our $projectroot;
2512                                 # skip project-list toplevel, if we get it.
2513                                 return if (m!^[/.]$!);
2514                                 # only directories can be git repositories
2515                                 return unless (-d $_);
2516                                 # don't traverse too deep (Find is super slow on os x)
2517                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2518                                         $File::Find::prune = 1;
2519                                         return;
2520                                 }
2521
2522                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2523                                 # we check related file in $projectroot
2524                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2525                                 if (check_export_ok("$projectroot/$path")) {
2526                                         push @list, { path => $path };
2527                                         $File::Find::prune = 1;
2528                                 }
2529                         },
2530                 }, "$dir");
2531
2532         } elsif (-f $projects_list) {
2533                 # read from file(url-encoded):
2534                 # 'git%2Fgit.git Linus+Torvalds'
2535                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2536                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2537                 my %paths;
2538                 open my $fd, '<', $projects_list or return;
2539         PROJECT:
2540                 while (my $line = <$fd>) {
2541                         chomp $line;
2542                         my ($path, $owner) = split ' ', $line;
2543                         $path = unescape($path);
2544                         $owner = unescape($owner);
2545                         if (!defined $path) {
2546                                 next;
2547                         }
2548                         if ($filter ne '') {
2549                                 # looking for forks;
2550                                 my $pfx = substr($path, 0, length($filter));
2551                                 if ($pfx ne $filter) {
2552                                         next PROJECT;
2553                                 }
2554                                 my $sfx = substr($path, length($filter));
2555                                 if ($sfx !~ /^\/.*\.git$/) {
2556                                         next PROJECT;
2557                                 }
2558                         } elsif ($check_forks) {
2559                         PATH:
2560                                 foreach my $filter (keys %paths) {
2561                                         # looking for forks;
2562                                         my $pfx = substr($path, 0, length($filter));
2563                                         if ($pfx ne $filter) {
2564                                                 next PATH;
2565                                         }
2566                                         my $sfx = substr($path, length($filter));
2567                                         if ($sfx !~ /^\/.*\.git$/) {
2568                                                 next PATH;
2569                                         }
2570                                         # is a fork, don't include it in
2571                                         # the list
2572                                         next PROJECT;
2573                                 }
2574                         }
2575                         if (check_export_ok("$projectroot/$path")) {
2576                                 my $pr = {
2577                                         path => $path,
2578                                         owner => to_utf8($owner),
2579                                 };
2580                                 push @list, $pr;
2581                                 (my $forks_path = $path) =~ s/\.git$//;
2582                                 $paths{$forks_path}++;
2583                         }
2584                 }
2585                 close $fd;
2586         }
2587         return @list;
2588 }
2589
2590 our $gitweb_project_owner = undef;
2591 sub git_get_project_list_from_file {
2592
2593         return if (defined $gitweb_project_owner);
2594
2595         $gitweb_project_owner = {};
2596         # read from file (url-encoded):
2597         # 'git%2Fgit.git Linus+Torvalds'
2598         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2599         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2600         if (-f $projects_list) {
2601                 open(my $fd, '<', $projects_list);
2602                 while (my $line = <$fd>) {
2603                         chomp $line;
2604                         my ($pr, $ow) = split ' ', $line;
2605                         $pr = unescape($pr);
2606                         $ow = unescape($ow);
2607                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2608                 }
2609                 close $fd;
2610         }
2611 }
2612
2613 sub git_get_project_owner {
2614         my $project = shift;
2615         my $owner;
2616
2617         return undef unless $project;
2618         $git_dir = "$projectroot/$project";
2619
2620         if (!defined $gitweb_project_owner) {
2621                 git_get_project_list_from_file();
2622         }
2623
2624         if (exists $gitweb_project_owner->{$project}) {
2625                 $owner = $gitweb_project_owner->{$project};
2626         }
2627         if (!defined $owner){
2628                 $owner = git_get_project_config('owner');
2629         }
2630         if (!defined $owner) {
2631                 $owner = get_file_owner("$git_dir");
2632         }
2633
2634         return $owner;
2635 }
2636
2637 sub git_get_last_activity {
2638         my ($path) = @_;
2639         my $fd;
2640
2641         $git_dir = "$projectroot/$path";
2642         open($fd, "-|", git_cmd(), 'for-each-ref',
2643              '--format=%(committer)',
2644              '--sort=-committerdate',
2645              '--count=1',
2646              'refs/heads') or return;
2647         my $most_recent = <$fd>;
2648         close $fd or return;
2649         if (defined $most_recent &&
2650             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2651                 my $timestamp = $1;
2652                 my $age = time - $timestamp;
2653                 return ($age, age_string($age));
2654         }
2655         return (undef, undef);
2656 }
2657
2658 sub git_get_references {
2659         my $type = shift || "";
2660         my %refs;
2661         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2662         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2663         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2664                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2665                 or return;
2666
2667         while (my $line = <$fd>) {
2668                 chomp $line;
2669                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2670                         if (defined $refs{$1}) {
2671                                 push @{$refs{$1}}, $2;
2672                         } else {
2673                                 $refs{$1} = [ $2 ];
2674                         }
2675                 }
2676         }
2677         close $fd or return;
2678         return \%refs;
2679 }
2680
2681 sub git_get_rev_name_tags {
2682         my $hash = shift || return undef;
2683
2684         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2685                 or return;
2686         my $name_rev = <$fd>;
2687         close $fd;
2688
2689         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2690                 return $1;
2691         } else {
2692                 # catches also '$hash undefined' output
2693                 return undef;
2694         }
2695 }
2696
2697 ## ----------------------------------------------------------------------
2698 ## parse to hash functions
2699
2700 sub parse_date {
2701         my $epoch = shift;
2702         my $tz = shift || "-0000";
2703
2704         my %date;
2705         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2706         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2707         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2708         $date{'hour'} = $hour;
2709         $date{'minute'} = $min;
2710         $date{'mday'} = $mday;
2711         $date{'day'} = $days[$wday];
2712         $date{'month'} = $months[$mon];
2713         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2714                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2715         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2716                              $mday, $months[$mon], $hour ,$min;
2717         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2718                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2719
2720         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2721         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2722         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2723         $date{'hour_local'} = $hour;
2724         $date{'minute_local'} = $min;
2725         $date{'tz_local'} = $tz;
2726         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2727                                   1900+$year, $mon+1, $mday,
2728                                   $hour, $min, $sec, $tz);
2729         return %date;
2730 }
2731
2732 sub parse_tag {
2733         my $tag_id = shift;
2734         my %tag;
2735         my @comment;
2736
2737         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2738         $tag{'id'} = $tag_id;
2739         while (my $line = <$fd>) {
2740                 chomp $line;
2741                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2742                         $tag{'object'} = $1;
2743                 } elsif ($line =~ m/^type (.+)$/) {
2744                         $tag{'type'} = $1;
2745                 } elsif ($line =~ m/^tag (.+)$/) {
2746                         $tag{'name'} = $1;
2747                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2748                         $tag{'author'} = $1;
2749                         $tag{'author_epoch'} = $2;
2750                         $tag{'author_tz'} = $3;
2751                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2752                                 $tag{'author_name'}  = $1;
2753                                 $tag{'author_email'} = $2;
2754                         } else {
2755                                 $tag{'author_name'} = $tag{'author'};
2756                         }
2757                 } elsif ($line =~ m/--BEGIN/) {
2758                         push @comment, $line;
2759                         last;
2760                 } elsif ($line eq "") {
2761                         last;
2762                 }
2763         }
2764         push @comment, <$fd>;
2765         $tag{'comment'} = \@comment;
2766         close $fd or return;
2767         if (!defined $tag{'name'}) {
2768                 return
2769         };
2770         return %tag
2771 }
2772
2773 sub parse_commit_text {
2774         my ($commit_text, $withparents) = @_;
2775         my @commit_lines = split '\n', $commit_text;
2776         my %co;
2777
2778         pop @commit_lines; # Remove '\0'
2779
2780         if (! @commit_lines) {
2781                 return;
2782         }
2783
2784         my $header = shift @commit_lines;
2785         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2786                 return;
2787         }
2788         ($co{'id'}, my @parents) = split ' ', $header;
2789         while (my $line = shift @commit_lines) {
2790                 last if $line eq "\n";
2791                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2792                         $co{'tree'} = $1;
2793                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2794                         push @parents, $1;
2795                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2796                         $co{'author'} = to_utf8($1);
2797                         $co{'author_epoch'} = $2;
2798                         $co{'author_tz'} = $3;
2799                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2800                                 $co{'author_name'}  = $1;
2801                                 $co{'author_email'} = $2;
2802                         } else {
2803                                 $co{'author_name'} = $co{'author'};
2804                         }
2805                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2806                         $co{'committer'} = to_utf8($1);
2807                         $co{'committer_epoch'} = $2;
2808                         $co{'committer_tz'} = $3;
2809                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2810                                 $co{'committer_name'}  = $1;
2811                                 $co{'committer_email'} = $2;
2812                         } else {
2813                                 $co{'committer_name'} = $co{'committer'};
2814                         }
2815                 }
2816         }
2817         if (!defined $co{'tree'}) {
2818                 return;
2819         };
2820         $co{'parents'} = \@parents;
2821         $co{'parent'} = $parents[0];
2822
2823         foreach my $title (@commit_lines) {
2824                 $title =~ s/^    //;
2825                 if ($title ne "") {
2826                         $co{'title'} = chop_str($title, 80, 5);
2827                         # remove leading stuff of merges to make the interesting part visible
2828                         if (length($title) > 50) {
2829                                 $title =~ s/^Automatic //;
2830                                 $title =~ s/^merge (of|with) /Merge ... /i;
2831                                 if (length($title) > 50) {
2832                                         $title =~ s/(http|rsync):\/\///;
2833                                 }
2834                                 if (length($title) > 50) {
2835                                         $title =~ s/(master|www|rsync)\.//;
2836                                 }
2837                                 if (length($title) > 50) {
2838                                         $title =~ s/kernel.org:?//;
2839                                 }
2840                                 if (length($title) > 50) {
2841                                         $title =~ s/\/pub\/scm//;
2842                                 }
2843                         }
2844                         $co{'title_short'} = chop_str($title, 50, 5);
2845                         last;
2846                 }
2847         }
2848         if (! defined $co{'title'} || $co{'title'} eq "") {
2849                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2850         }
2851         # remove added spaces
2852         foreach my $line (@commit_lines) {
2853                 $line =~ s/^    //;
2854         }
2855         $co{'comment'} = \@commit_lines;
2856
2857         my $age = time - $co{'committer_epoch'};
2858         $co{'age'} = $age;
2859         $co{'age_string'} = age_string($age);
2860         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2861         if ($age > 60*60*24*7*2) {
2862                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2863                 $co{'age_string_age'} = $co{'age_string'};
2864         } else {
2865                 $co{'age_string_date'} = $co{'age_string'};
2866                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2867         }
2868         return %co;
2869 }
2870
2871 sub parse_commit {
2872         my ($commit_id) = @_;
2873         my %co;
2874
2875         local $/ = "\0";
2876
2877         open my $fd, "-|", git_cmd(), "rev-list",
2878                 "--parents",
2879                 "--header",
2880                 "--max-count=1",
2881                 $commit_id,
2882                 "--",
2883                 or die_error(500, "Open git-rev-list failed");
2884         %co = parse_commit_text(<$fd>, 1);
2885         close $fd;
2886
2887         return %co;
2888 }
2889
2890 sub parse_commits {
2891         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2892         my @cos;
2893
2894         $maxcount ||= 1;
2895         $skip ||= 0;
2896
2897         local $/ = "\0";
2898
2899         open my $fd, "-|", git_cmd(), "rev-list",
2900                 "--header",
2901                 @args,
2902                 ("--max-count=" . $maxcount),
2903                 ("--skip=" . $skip),
2904                 @extra_options,
2905                 $commit_id,
2906                 "--",
2907                 ($filename ? ($filename) : ())
2908                 or die_error(500, "Open git-rev-list failed");
2909         while (my $line = <$fd>) {
2910                 my %co = parse_commit_text($line);
2911                 push @cos, \%co;
2912         }
2913         close $fd;
2914
2915         return wantarray ? @cos : \@cos;
2916 }
2917
2918 # parse line of git-diff-tree "raw" output
2919 sub parse_difftree_raw_line {
2920         my $line = shift;
2921         my %res;
2922
2923         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2924         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2925         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2926                 $res{'from_mode'} = $1;
2927                 $res{'to_mode'} = $2;
2928                 $res{'from_id'} = $3;
2929                 $res{'to_id'} = $4;
2930                 $res{'status'} = $5;
2931                 $res{'similarity'} = $6;
2932                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2933                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2934                 } else {
2935                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2936                 }
2937         }
2938         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2939         # combined diff (for merge commit)
2940         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2941                 $res{'nparents'}  = length($1);
2942                 $res{'from_mode'} = [ split(' ', $2) ];
2943                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2944                 $res{'from_id'} = [ split(' ', $3) ];
2945                 $res{'to_id'} = pop @{$res{'from_id'}};
2946                 $res{'status'} = [ split('', $4) ];
2947                 $res{'to_file'} = unquote($5);
2948         }
2949         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2950         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2951                 $res{'commit'} = $1;
2952         }
2953
2954         return wantarray ? %res : \%res;
2955 }
2956
2957 # wrapper: return parsed line of git-diff-tree "raw" output
2958 # (the argument might be raw line, or parsed info)
2959 sub parsed_difftree_line {
2960         my $line_or_ref = shift;
2961
2962         if (ref($line_or_ref) eq "HASH") {
2963                 # pre-parsed (or generated by hand)
2964                 return $line_or_ref;
2965         } else {
2966                 return parse_difftree_raw_line($line_or_ref);
2967         }
2968 }
2969
2970 # parse line of git-ls-tree output
2971 sub parse_ls_tree_line {
2972         my $line = shift;
2973         my %opts = @_;
2974         my %res;
2975
2976         if ($opts{'-l'}) {
2977                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2978                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2979
2980                 $res{'mode'} = $1;
2981                 $res{'type'} = $2;
2982                 $res{'hash'} = $3;
2983                 $res{'size'} = $4;
2984                 if ($opts{'-z'}) {
2985                         $res{'name'} = $5;
2986                 } else {
2987                         $res{'name'} = unquote($5);
2988                 }
2989         } else {
2990                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2991                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2992
2993                 $res{'mode'} = $1;
2994                 $res{'type'} = $2;
2995                 $res{'hash'} = $3;
2996                 if ($opts{'-z'}) {
2997                         $res{'name'} = $4;
2998                 } else {
2999                         $res{'name'} = unquote($4);
3000                 }
3001         }
3002
3003         return wantarray ? %res : \%res;
3004 }
3005
3006 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3007 sub parse_from_to_diffinfo {
3008         my ($diffinfo, $from, $to, @parents) = @_;
3009
3010         if ($diffinfo->{'nparents'}) {
3011                 # combined diff
3012                 $from->{'file'} = [];
3013                 $from->{'href'} = [];
3014                 fill_from_file_info($diffinfo, @parents)
3015                         unless exists $diffinfo->{'from_file'};
3016                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3017                         $from->{'file'}[$i] =
3018                                 defined $diffinfo->{'from_file'}[$i] ?
3019                                         $diffinfo->{'from_file'}[$i] :
3020                                         $diffinfo->{'to_file'};
3021                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3022                                 $from->{'href'}[$i] = href(action=>"blob",
3023                                                            hash_base=>$parents[$i],
3024                                                            hash=>$diffinfo->{'from_id'}[$i],
3025                                                            file_name=>$from->{'file'}[$i]);
3026                         } else {
3027                                 $from->{'href'}[$i] = undef;
3028                         }
3029                 }
3030         } else {
3031                 # ordinary (not combined) diff
3032                 $from->{'file'} = $diffinfo->{'from_file'};
3033                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3034                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3035                                                hash=>$diffinfo->{'from_id'},
3036                                                file_name=>$from->{'file'});
3037                 } else {
3038                         delete $from->{'href'};
3039                 }
3040         }
3041
3042         $to->{'file'} = $diffinfo->{'to_file'};
3043         if (!is_deleted($diffinfo)) { # file exists in result
3044                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3045                                      hash=>$diffinfo->{'to_id'},
3046                                      file_name=>$to->{'file'});
3047         } else {
3048                 delete $to->{'href'};
3049         }
3050 }
3051
3052 ## ......................................................................
3053 ## parse to array of hashes functions
3054
3055 sub git_get_heads_list {
3056         my $limit = shift;
3057         my @headslist;
3058
3059         open my $fd, '-|', git_cmd(), 'for-each-ref',
3060                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3061                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3062                 'refs/heads'
3063                 or return;
3064         while (my $line = <$fd>) {
3065                 my %ref_item;
3066
3067                 chomp $line;
3068                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3069                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3070                 my ($committer, $epoch, $tz) =
3071                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3072                 $ref_item{'fullname'}  = $name;
3073                 $name =~ s!^refs/heads/!!;
3074
3075                 $ref_item{'name'}  = $name;
3076                 $ref_item{'id'}    = $hash;
3077                 $ref_item{'title'} = $title || '(no commit message)';
3078                 $ref_item{'epoch'} = $epoch;
3079                 if ($epoch) {
3080                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3081                 } else {
3082                         $ref_item{'age'} = "unknown";
3083                 }
3084
3085                 push @headslist, \%ref_item;
3086         }
3087         close $fd;
3088
3089         return wantarray ? @headslist : \@headslist;
3090 }
3091
3092 sub git_get_tags_list {
3093         my $limit = shift;
3094         my @tagslist;
3095
3096         open my $fd, '-|', git_cmd(), 'for-each-ref',
3097                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3098                 '--format=%(objectname) %(objecttype) %(refname) '.
3099                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3100                 'refs/tags'
3101                 or return;
3102         while (my $line = <$fd>) {
3103                 my %ref_item;
3104
3105                 chomp $line;
3106                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3107                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3108                 my ($creator, $epoch, $tz) =
3109                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3110                 $ref_item{'fullname'} = $name;
3111                 $name =~ s!^refs/tags/!!;
3112
3113                 $ref_item{'type'} = $type;
3114                 $ref_item{'id'} = $id;
3115                 $ref_item{'name'} = $name;
3116                 if ($type eq "tag") {
3117                         $ref_item{'subject'} = $title;
3118                         $ref_item{'reftype'} = $reftype;
3119                         $ref_item{'refid'}   = $refid;
3120                 } else {
3121                         $ref_item{'reftype'} = $type;
3122                         $ref_item{'refid'}   = $id;
3123                 }
3124
3125                 if ($type eq "tag" || $type eq "commit") {
3126                         $ref_item{'epoch'} = $epoch;
3127                         if ($epoch) {
3128                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3129                         } else {
3130                                 $ref_item{'age'} = "unknown";
3131                         }
3132                 }
3133
3134                 push @tagslist, \%ref_item;
3135         }
3136         close $fd;
3137
3138         return wantarray ? @tagslist : \@tagslist;
3139 }
3140
3141 ## ----------------------------------------------------------------------
3142 ## filesystem-related functions
3143
3144 sub get_file_owner {
3145         my $path = shift;
3146
3147         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3148         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3149         if (!defined $gcos) {
3150                 return undef;
3151         }
3152         my $owner = $gcos;
3153         $owner =~ s/[,;].*$//;
3154         return to_utf8($owner);
3155 }
3156
3157 # assume that file exists
3158 sub insert_file {
3159         my $filename = shift;
3160
3161         open my $fd, '<', $filename;
3162         print map { to_utf8($_) } <$fd>;
3163         close $fd;
3164 }
3165
3166 ## ......................................................................
3167 ## mimetype related functions
3168
3169 sub mimetype_guess_file {
3170         my $filename = shift;
3171         my $mimemap = shift;
3172         -r $mimemap or return undef;
3173
3174         my %mimemap;
3175         open(my $mh, '<', $mimemap) or return undef;
3176         while (<$mh>) {
3177                 next if m/^#/; # skip comments
3178                 my ($mimetype, $exts) = split(/\t+/);
3179                 if (defined $exts) {
3180                         my @exts = split(/\s+/, $exts);
3181                         foreach my $ext (@exts) {
3182                                 $mimemap{$ext} = $mimetype;
3183                         }
3184                 }
3185         }
3186         close($mh);
3187
3188         $filename =~ /\.([^.]*)$/;
3189         return $mimemap{$1};
3190 }
3191
3192 sub mimetype_guess {
3193         my $filename = shift;
3194         my $mime;
3195         $filename =~ /\./ or return undef;
3196
3197         if ($mimetypes_file) {
3198                 my $file = $mimetypes_file;
3199                 if ($file !~ m!^/!) { # if it is relative path
3200                         # it is relative to project
3201                         $file = "$projectroot/$project/$file";
3202                 }
3203                 $mime = mimetype_guess_file($filename, $file);
3204         }
3205         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3206         return $mime;
3207 }
3208
3209 sub blob_mimetype {
3210         my $fd = shift;
3211         my $filename = shift;
3212
3213         if ($filename) {
3214                 my $mime = mimetype_guess($filename);
3215                 $mime and return $mime;
3216         }
3217
3218         # just in case
3219         return $default_blob_plain_mimetype unless $fd;
3220
3221         if (-T $fd) {
3222                 return 'text/plain';
3223         } elsif (! $filename) {
3224                 return 'application/octet-stream';
3225         } elsif ($filename =~ m/\.png$/i) {
3226                 return 'image/png';
3227         } elsif ($filename =~ m/\.gif$/i) {
3228                 return 'image/gif';
3229         } elsif ($filename =~ m/\.jpe?g$/i) {
3230                 return 'image/jpeg';
3231         } else {
3232                 return 'application/octet-stream';
3233         }
3234 }
3235
3236 sub blob_contenttype {
3237         my ($fd, $file_name, $type) = @_;
3238
3239         $type ||= blob_mimetype($fd, $file_name);
3240         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3241                 $type .= "; charset=$default_text_plain_charset";
3242         }
3243
3244         return $type;
3245 }
3246
3247 # guess file syntax for syntax highlighting; return undef if no highlighting
3248 # the name of syntax can (in the future) depend on syntax highlighter used
3249 sub guess_file_syntax {
3250         my ($highlight, $mimetype, $file_name) = @_;
3251         return undef unless ($highlight && defined $file_name);
3252
3253         # configuration for 'highlight' (http://www.andre-simon.de/)
3254         # match by basename
3255         my %highlight_basename = (
3256                 #'Program' => 'py',
3257                 #'Library' => 'py',
3258                 'SConstruct' => 'py', # SCons equivalent of Makefile
3259                 'Makefile' => 'make',
3260         );
3261         # match by extension
3262         my %highlight_ext = (
3263                 # main extensions, defining name of syntax;
3264                 # see files in /usr/share/highlight/langDefs/ directory
3265                 map { $_ => $_ }
3266                         qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
3267                 # alternate extensions, see /etc/highlight/filetypes.conf
3268                 'h' => 'c',
3269                 map { $_ => 'cpp' } qw(cxx c++ cc),
3270                 map { $_ => 'php' } qw(php3 php4),
3271                 map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
3272                 'mak' => 'make',
3273                 map { $_ => 'xml' } qw(xhtml html htm),
3274         );
3275
3276         my $basename = basename($file_name, '.in');
3277         return $highlight_basename{$basename}
3278                 if exists $highlight_basename{$basename};
3279
3280         $basename =~ /\.([^.]*)$/;
3281         my $ext = $1 or return undef;
3282         return $highlight_ext{$ext}
3283                 if exists $highlight_ext{$ext};
3284
3285         return undef;
3286 }
3287
3288 # run highlighter and return FD of its output,
3289 # or return original FD if no highlighting
3290 sub run_highlighter {
3291         my ($fd, $highlight, $syntax) = @_;
3292         return $fd unless ($highlight && defined $syntax);
3293
3294         close $fd
3295                 or die_error(404, "Reading blob failed");
3296         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3297                   "highlight --xhtml --fragment --syntax $syntax |"
3298                 or die_error(500, "Couldn't open file or run syntax highlighter");
3299         return $fd;
3300 }
3301
3302 ## ======================================================================
3303 ## functions printing HTML: header, footer, error page
3304
3305 sub get_page_title {
3306         my $title = to_utf8($site_name);
3307
3308         return $title unless (defined $project);
3309         $title .= " - " . to_utf8($project);
3310
3311         return $title unless (defined $action);
3312         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3313
3314         return $title unless (defined $file_name);
3315         $title .= " - " . esc_path($file_name);
3316         if ($action eq "tree" && $file_name !~ m|/$|) {
3317                 $title .= "/";
3318         }
3319
3320         return $title;
3321 }
3322
3323 sub git_header_html {
3324         my $status = shift || "200 OK";
3325         my $expires = shift;
3326         my %opts = @_;
3327
3328         my $title = get_page_title();
3329         my $content_type;
3330         # require explicit support from the UA if we are to send the page as
3331         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3332         # we have to do this because MSIE sometimes globs '*/*', pretending to
3333         # support xhtml+xml but choking when it gets what it asked for.
3334         if (defined $cgi->http('HTTP_ACCEPT') &&
3335             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3336             $cgi->Accept('application/xhtml+xml') != 0) {
3337                 $content_type = 'application/xhtml+xml';
3338         } else {
3339                 $content_type = 'text/html';
3340         }
3341         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3342                            -status=> $status, -expires => $expires)
3343                 unless ($opts{'-no_http_headers'});
3344         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3345         print <<EOF;
3346 <?xml version="1.0" encoding="utf-8"?>
3347 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3348 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3349 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3350 <!-- git core binaries version $git_version -->
3351 <head>
3352 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3353 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3354 <meta name="robots" content="index, nofollow"/>
3355 <title>$title</title>
3356 EOF
3357         # the stylesheet, favicon etc urls won't work correctly with path_info
3358         # unless we set the appropriate base URL
3359         if ($ENV{'PATH_INFO'}) {
3360                 print "<base href=\"".esc_url($base_url)."\" />\n";
3361         }
3362         # print out each stylesheet that exist, providing backwards capability
3363         # for those people who defined $stylesheet in a config file
3364         if (defined $stylesheet) {
3365                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3366         } else {
3367                 foreach my $stylesheet (@stylesheets) {
3368                         next unless $stylesheet;
3369                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3370                 }
3371         }
3372         if (defined $project) {
3373                 my %href_params = get_feed_info();
3374                 if (!exists $href_params{'-title'}) {
3375                         $href_params{'-title'} = 'log';
3376                 }
3377
3378                 foreach my $format qw(RSS Atom) {
3379                         my $type = lc($format);
3380                         my %link_attr = (
3381                                 '-rel' => 'alternate',
3382                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3383                                 '-type' => "application/$type+xml"
3384                         );
3385
3386                         $href_params{'action'} = $type;
3387                         $link_attr{'-href'} = href(%href_params);
3388                         print "<link ".
3389                               "rel=\"$link_attr{'-rel'}\" ".
3390                               "title=\"$link_attr{'-title'}\" ".
3391                               "href=\"$link_attr{'-href'}\" ".
3392                               "type=\"$link_attr{'-type'}\" ".
3393                               "/>\n";
3394
3395                         $href_params{'extra_options'} = '--no-merges';
3396                         $link_attr{'-href'} = href(%href_params);
3397                         $link_attr{'-title'} .= ' (no merges)';
3398                         print "<link ".
3399                               "rel=\"$link_attr{'-rel'}\" ".
3400                               "title=\"$link_attr{'-title'}\" ".
3401                               "href=\"$link_attr{'-href'}\" ".
3402                               "type=\"$link_attr{'-type'}\" ".
3403                               "/>\n";
3404                 }
3405
3406         } else {
3407                 printf('<link rel="alternate" title="%s projects list" '.
3408                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3409                        $site_name, href(project=>undef, action=>"project_index"));
3410                 printf('<link rel="alternate" title="%s projects feeds" '.
3411                        'href="%s" type="text/x-opml" />'."\n",
3412                        $site_name, href(project=>undef, action=>"opml"));
3413         }
3414         if (defined $favicon) {
3415                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3416         }
3417
3418         print "</head>\n" .
3419               "<body>\n";
3420
3421         if (defined $site_header && -f $site_header) {
3422                 insert_file($site_header);
3423         }
3424
3425         print "<div class=\"page_header\">\n" .
3426               $cgi->a({-href => esc_url($logo_url),
3427                        -title => $logo_label},
3428                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3429         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3430         if (defined $project) {
3431                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3432                 if (defined $action) {
3433                         print " / $action";
3434                 }
3435                 print "\n";
3436         }
3437         print "</div>\n";
3438
3439         my $have_search = gitweb_check_feature('search');
3440         if (defined $project && $have_search) {
3441                 if (!defined $searchtext) {
3442                         $searchtext = "";
3443                 }
3444                 my $search_hash;
3445                 if (defined $hash_base) {
3446                         $search_hash = $hash_base;
3447                 } elsif (defined $hash) {
3448                         $search_hash = $hash;
3449                 } else {
3450                         $search_hash = "HEAD";
3451                 }
3452                 my $action = $my_uri;
3453                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3454                 if ($use_pathinfo) {
3455                         $action .= "/".esc_url($project);
3456                 }
3457                 print $cgi->startform(-method => "get", -action => $action) .
3458                       "<div class=\"search\">\n" .
3459                       (!$use_pathinfo &&
3460                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3461                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3462                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3463                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3464                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3465                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3466                       " search:\n",
3467                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3468                       "<span title=\"Extended regular expression\">" .
3469                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3470                                      -checked => $search_use_regexp) .
3471                       "</span>" .
3472                       "</div>" .
3473                       $cgi->end_form() . "\n";
3474         }
3475 }
3476
3477 sub git_footer_html {
3478         my $feed_class = 'rss_logo';
3479
3480         print "<div class=\"page_footer\">\n";
3481         if (defined $project) {
3482                 my $descr = git_get_project_description($project);
3483                 if (defined $descr) {
3484                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3485                 }
3486
3487                 my %href_params = get_feed_info();
3488                 if (!%href_params) {
3489                         $feed_class .= ' generic';
3490                 }
3491                 $href_params{'-title'} ||= 'log';
3492
3493                 foreach my $format qw(RSS Atom) {
3494                         $href_params{'action'} = lc($format);
3495                         print $cgi->a({-href => href(%href_params),
3496                                       -title => "$href_params{'-title'} $format feed",
3497                                       -class => $feed_class}, $format)."\n";
3498                 }
3499
3500         } else {
3501                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3502                               -class => $feed_class}, "OPML") . " ";
3503                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3504                               -class => $feed_class}, "TXT") . "\n";
3505         }
3506         print "</div>\n"; # class="page_footer"
3507
3508         if (defined $t0 && gitweb_check_feature('timed')) {
3509                 print "<div id=\"generating_info\">\n";
3510                 print 'This page took '.
3511                       '<span id="generating_time" class="time_span">'.
3512                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3513                       ' seconds </span>'.
3514                       ' and '.
3515                       '<span id="generating_cmd">'.
3516                       $number_of_git_cmds.
3517                       '</span> git commands '.
3518                       " to generate.\n";
3519                 print "</div>\n"; # class="page_footer"
3520         }
3521
3522         if (defined $site_footer && -f $site_footer) {
3523                 insert_file($site_footer);
3524         }
3525
3526         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3527         if (defined $action &&
3528             $action eq 'blame_incremental') {
3529                 print qq!<script type="text/javascript">\n!.
3530                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3531                       qq!           "!. href() .qq!");\n!.
3532                       qq!</script>\n!;
3533         } elsif (gitweb_check_feature('javascript-actions')) {
3534                 print qq!<script type="text/javascript">\n!.
3535                       qq!window.onload = fixLinks;\n!.
3536                       qq!</script>\n!;
3537         }
3538
3539         print "</body>\n" .
3540               "</html>";
3541 }
3542
3543 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3544 # Example: die_error(404, 'Hash not found')
3545 # By convention, use the following status codes (as defined in RFC 2616):
3546 # 400: Invalid or missing CGI parameters, or
3547 #      requested object exists but has wrong type.
3548 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3549 #      this server or project.
3550 # 404: Requested object/revision/project doesn't exist.
3551 # 500: The server isn't configured properly, or
3552 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3553 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3554 # 503: The server is currently unavailable (because it is overloaded,
3555 #      or down for maintenance).  Generally, this is a temporary state.
3556 sub die_error {
3557         my $status = shift || 500;
3558         my $error = esc_html(shift) || "Internal Server Error";
3559         my $extra = shift;
3560         my %opts = @_;
3561
3562         my %http_responses = (
3563                 400 => '400 Bad Request',
3564                 403 => '403 Forbidden',
3565                 404 => '404 Not Found',
3566                 500 => '500 Internal Server Error',
3567                 503 => '503 Service Unavailable',
3568         );
3569         git_header_html($http_responses{$status}, undef, %opts);
3570         print <<EOF;
3571 <div class="page_body">
3572 <br /><br />
3573 $status - $error
3574 <br />
3575 EOF
3576         if (defined $extra) {
3577                 print "<hr />\n" .
3578                       "$extra\n";
3579         }
3580         print "</div>\n";
3581
3582         git_footer_html();
3583         goto DONE_GITWEB
3584                 unless ($opts{'-error_handler'});
3585 }
3586
3587 ## ----------------------------------------------------------------------
3588 ## functions printing or outputting HTML: navigation
3589
3590 sub git_print_page_nav {
3591         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3592         $extra = '' if !defined $extra; # pager or formats
3593
3594         my @navs = qw(summary shortlog log commit commitdiff tree);
3595         if ($suppress) {
3596                 @navs = grep { $_ ne $suppress } @navs;
3597         }
3598
3599         my %arg = map { $_ => {action=>$_} } @navs;
3600         if (defined $head) {
3601                 for (qw(commit commitdiff)) {
3602                         $arg{$_}{'hash'} = $head;
3603                 }
3604                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3605                         for (qw(shortlog log)) {
3606                                 $arg{$_}{'hash'} = $head;
3607                         }
3608                 }
3609         }
3610
3611         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3612         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3613
3614         my @actions = gitweb_get_feature('actions');
3615         my %repl = (
3616                 '%' => '%',
3617                 'n' => $project,         # project name
3618                 'f' => $git_dir,         # project path within filesystem
3619                 'h' => $treehead || '',  # current hash ('h' parameter)
3620                 'b' => $treebase || '',  # hash base ('hb' parameter)
3621         );
3622         while (@actions) {
3623                 my ($label, $link, $pos) = splice(@actions,0,3);
3624                 # insert
3625                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3626                 # munch munch
3627                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3628                 $arg{$label}{'_href'} = $link;
3629         }
3630
3631         print "<div class=\"page_nav\">\n" .
3632                 (join " | ",
3633                  map { $_ eq $current ?
3634                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3635                  } @navs);
3636         print "<br/>\n$extra<br/>\n" .
3637               "</div>\n";
3638 }
3639
3640 sub format_paging_nav {
3641         my ($action, $page, $has_next_link) = @_;
3642         my $paging_nav;
3643
3644
3645         if ($page > 0) {
3646                 $paging_nav .=
3647                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3648                         " &sdot; " .
3649                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3650                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3651         } else {
3652                 $paging_nav .= "first &sdot; prev";
3653         }
3654
3655         if ($has_next_link) {
3656                 $paging_nav .= " &sdot; " .
3657                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3658                                  -accesskey => "n", -title => "Alt-n"}, "next");
3659         } else {
3660                 $paging_nav .= " &sdot; next";
3661         }
3662
3663         return $paging_nav;
3664 }
3665
3666 ## ......................................................................
3667 ## functions printing or outputting HTML: div
3668
3669 sub git_print_header_div {
3670         my ($action, $title, $hash, $hash_base) = @_;
3671         my %args = ();
3672
3673         $args{'action'} = $action;
3674         $args{'hash'} = $hash if $hash;
3675         $args{'hash_base'} = $hash_base if $hash_base;
3676
3677         print "<div class=\"header\">\n" .
3678               $cgi->a({-href => href(%args), -class => "title"},
3679               $title ? $title : $action) .
3680               "\n</div>\n";
3681 }
3682
3683 sub print_local_time {
3684         print format_local_time(@_);
3685 }
3686
3687 sub format_local_time {
3688         my $localtime = '';
3689         my %date = @_;
3690         if ($date{'hour_local'} < 6) {
3691                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3692                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3693         } else {
3694                 $localtime .= sprintf(" (%02d:%02d %s)",
3695                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3696         }
3697
3698         return $localtime;
3699 }
3700
3701 # Outputs the author name and date in long form
3702 sub git_print_authorship {
3703         my $co = shift;
3704         my %opts = @_;
3705         my $tag = $opts{-tag} || 'div';
3706         my $author = $co->{'author_name'};
3707
3708         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3709         print "<$tag class=\"author_date\">" .
3710               format_search_author($author, "author", esc_html($author)) .
3711               " [$ad{'rfc2822'}";
3712         print_local_time(%ad) if ($opts{-localtime});
3713         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3714                   . "</$tag>\n";
3715 }
3716
3717 # Outputs table rows containing the full author or committer information,
3718 # in the format expected for 'commit' view (& similia).
3719 # Parameters are a commit hash reference, followed by the list of people
3720 # to output information for. If the list is empty it defalts to both
3721 # author and committer.
3722 sub git_print_authorship_rows {
3723         my $co = shift;
3724         # too bad we can't use @people = @_ || ('author', 'committer')
3725         my @people = @_;
3726         @people = ('author', 'committer') unless @people;
3727         foreach my $who (@people) {
3728                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3729                 print "<tr><td>$who</td><td>" .
3730                       format_search_author($co->{"${who}_name"}, $who,
3731                                esc_html($co->{"${who}_name"})) . " " .
3732                       format_search_author($co->{"${who}_email"}, $who,
3733                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3734                       "</td><td rowspan=\"2\">" .
3735                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3736                       "</td></tr>\n" .
3737                       "<tr>" .
3738                       "<td></td><td> $wd{'rfc2822'}";
3739                 print_local_time(%wd);
3740                 print "</td>" .
3741                       "</tr>\n";
3742         }
3743 }
3744
3745 sub git_print_page_path {
3746         my $name = shift;
3747         my $type = shift;
3748         my $hb = shift;
3749
3750
3751         print "<div class=\"page_path\">";
3752         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3753                       -title => 'tree root'}, to_utf8("[$project]"));
3754         print " / ";
3755         if (defined $name) {
3756                 my @dirname = split '/', $name;
3757                 my $basename = pop @dirname;
3758                 my $fullname = '';
3759
3760                 foreach my $dir (@dirname) {
3761                         $fullname .= ($fullname ? '/' : '') . $dir;
3762                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3763                                                      hash_base=>$hb),
3764                                       -title => $fullname}, esc_path($dir));
3765                         print " / ";
3766                 }
3767                 if (defined $type && $type eq 'blob') {
3768                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3769                                                      hash_base=>$hb),
3770                                       -title => $name}, esc_path($basename));
3771                 } elsif (defined $type && $type eq 'tree') {
3772                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3773                                                      hash_base=>$hb),
3774                                       -title => $name}, esc_path($basename));
3775                         print " / ";
3776                 } else {
3777                         print esc_path($basename);
3778                 }
3779         }
3780         print "<br/></div>\n";
3781 }
3782
3783 sub git_print_log {
3784         my $log = shift;
3785         my %opts = @_;
3786
3787         if ($opts{'-remove_title'}) {
3788                 # remove title, i.e. first line of log
3789                 shift @$log;
3790         }
3791         # remove leading empty lines
3792         while (defined $log->[0] && $log->[0] eq "") {
3793                 shift @$log;
3794         }
3795
3796         # print log
3797         my $signoff = 0;
3798         my $empty = 0;
3799         foreach my $line (@$log) {
3800                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3801                         $signoff = 1;
3802                         $empty = 0;
3803                         if (! $opts{'-remove_signoff'}) {
3804                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3805                                 next;
3806                         } else {
3807                                 # remove signoff lines
3808                                 next;
3809                         }
3810                 } else {
3811                         $signoff = 0;
3812                 }
3813
3814                 # print only one empty line
3815                 # do not print empty line after signoff
3816                 if ($line eq "") {
3817                         next if ($empty || $signoff);
3818                         $empty = 1;
3819                 } else {
3820                         $empty = 0;
3821                 }
3822
3823                 print format_log_line_html($line) . "<br/>\n";
3824         }
3825
3826         if ($opts{'-final_empty_line'}) {
3827                 # end with single empty line
3828                 print "<br/>\n" unless $empty;
3829         }
3830 }
3831
3832 # return link target (what link points to)
3833 sub git_get_link_target {
3834         my $hash = shift;
3835         my $link_target;
3836
3837         # read link
3838         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3839                 or return;
3840         {
3841                 local $/ = undef;
3842                 $link_target = <$fd>;
3843         }
3844         close $fd
3845                 or return;
3846
3847         return $link_target;
3848 }
3849
3850 # given link target, and the directory (basedir) the link is in,
3851 # return target of link relative to top directory (top tree);
3852 # return undef if it is not possible (including absolute links).
3853 sub normalize_link_target {
3854         my ($link_target, $basedir) = @_;
3855
3856         # absolute symlinks (beginning with '/') cannot be normalized
3857         return if (substr($link_target, 0, 1) eq '/');
3858
3859         # normalize link target to path from top (root) tree (dir)
3860         my $path;
3861         if ($basedir) {
3862                 $path = $basedir . '/' . $link_target;
3863         } else {
3864                 # we are in top (root) tree (dir)
3865                 $path = $link_target;
3866         }
3867
3868         # remove //, /./, and /../
3869         my @path_parts;
3870         foreach my $part (split('/', $path)) {
3871                 # discard '.' and ''
3872                 next if (!$part || $part eq '.');
3873                 # handle '..'
3874                 if ($part eq '..') {
3875                         if (@path_parts) {
3876                                 pop @path_parts;
3877                         } else {
3878                                 # link leads outside repository (outside top dir)
3879                                 return;
3880                         }
3881                 } else {
3882                         push @path_parts, $part;
3883                 }
3884         }
3885         $path = join('/', @path_parts);
3886
3887         return $path;
3888 }
3889
3890 # print tree entry (row of git_tree), but without encompassing <tr> element
3891 sub git_print_tree_entry {
3892         my ($t, $basedir, $hash_base, $have_blame) = @_;
3893
3894         my %base_key = ();
3895         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3896
3897         # The format of a table row is: mode list link.  Where mode is
3898         # the mode of the entry, list is the name of the entry, an href,
3899         # and link is the action links of the entry.
3900
3901         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3902         if (exists $t->{'size'}) {
3903                 print "<td class=\"size\">$t->{'size'}</td>\n";
3904         }
3905         if ($t->{'type'} eq "blob") {
3906                 print "<td class=\"list\">" .
3907                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3908                                                file_name=>"$basedir$t->{'name'}", %base_key),
3909                                 -class => "list"}, esc_path($t->{'name'}));
3910                 if (S_ISLNK(oct $t->{'mode'})) {
3911                         my $link_target = git_get_link_target($t->{'hash'});
3912                         if ($link_target) {
3913                                 my $norm_target = normalize_link_target($link_target, $basedir);
3914                                 if (defined $norm_target) {
3915                                         print " -> " .
3916                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3917                                                                      file_name=>$norm_target),
3918                                                        -title => $norm_target}, esc_path($link_target));
3919                                 } else {
3920                                         print " -> " . esc_path($link_target);
3921                                 }
3922                         }
3923                 }
3924                 print "</td>\n";
3925                 print "<td class=\"link\">";
3926                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3927                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3928                               "blob");
3929                 if ($have_blame) {
3930                         print " | " .
3931                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3932                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3933                                       "blame");
3934                 }
3935                 if (defined $hash_base) {
3936                         print " | " .
3937                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3938                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3939                                       "history");
3940                 }
3941                 print " | " .
3942                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3943                                                file_name=>"$basedir$t->{'name'}")},
3944                                 "raw");
3945                 print "</td>\n";
3946
3947         } elsif ($t->{'type'} eq "tree") {
3948                 print "<td class=\"list\">";
3949                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3950                                              file_name=>"$basedir$t->{'name'}",
3951                                              %base_key)},
3952                               esc_path($t->{'name'}));
3953                 print "</td>\n";
3954                 print "<td class=\"link\">";
3955                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3956                                              file_name=>"$basedir$t->{'name'}",
3957                                              %base_key)},
3958                               "tree");
3959                 if (defined $hash_base) {
3960                         print " | " .
3961                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3962                                                      file_name=>"$basedir$t->{'name'}")},
3963                                       "history");
3964                 }
3965                 print "</td>\n";
3966         } else {
3967                 # unknown object: we can only present history for it
3968                 # (this includes 'commit' object, i.e. submodule support)
3969                 print "<td class=\"list\">" .
3970                       esc_path($t->{'name'}) .
3971                       "</td>\n";
3972                 print "<td class=\"link\">";
3973                 if (defined $hash_base) {
3974                         print $cgi->a({-href => href(action=>"history",
3975                                                      hash_base=>$hash_base,
3976                                                      file_name=>"$basedir$t->{'name'}")},
3977                                       "history");
3978                 }
3979                 print "</td>\n";
3980         }
3981 }
3982
3983 ## ......................................................................
3984 ## functions printing large fragments of HTML
3985
3986 # get pre-image filenames for merge (combined) diff
3987 sub fill_from_file_info {
3988         my ($diff, @parents) = @_;
3989
3990         $diff->{'from_file'} = [ ];
3991         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3992         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3993                 if ($diff->{'status'}[$i] eq 'R' ||
3994                     $diff->{'status'}[$i] eq 'C') {
3995                         $diff->{'from_file'}[$i] =
3996                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3997                 }
3998         }
3999
4000         return $diff;
4001 }
4002
4003 # is current raw difftree line of file deletion
4004 sub is_deleted {
4005         my $diffinfo = shift;
4006
4007         return $diffinfo->{'to_id'} eq ('0' x 40);
4008 }
4009
4010 # does patch correspond to [previous] difftree raw line
4011 # $diffinfo  - hashref of parsed raw diff format
4012 # $patchinfo - hashref of parsed patch diff format
4013 #              (the same keys as in $diffinfo)
4014 sub is_patch_split {
4015         my ($diffinfo, $patchinfo) = @_;
4016
4017         return defined $diffinfo && defined $patchinfo
4018                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4019 }
4020
4021
4022 sub git_difftree_body {
4023         my ($difftree, $hash, @parents) = @_;
4024         my ($parent) = $parents[0];
4025         my $have_blame = gitweb_check_feature('blame');
4026         print "<div class=\"list_head\">\n";
4027         if ($#{$difftree} > 10) {
4028                 print(($#{$difftree} + 1) . " files changed:\n");
4029         }
4030         print "</div>\n";
4031
4032         print "<table class=\"" .
4033               (@parents > 1 ? "combined " : "") .
4034               "diff_tree\">\n";
4035
4036         # header only for combined diff in 'commitdiff' view
4037         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4038         if ($has_header) {
4039                 # table header
4040                 print "<thead><tr>\n" .
4041                        "<th></th><th></th>\n"; # filename, patchN link
4042                 for (my $i = 0; $i < @parents; $i++) {
4043                         my $par = $parents[$i];
4044                         print "<th>" .
4045                               $cgi->a({-href => href(action=>"commitdiff",
4046                                                      hash=>$hash, hash_parent=>$par),
4047                                        -title => 'commitdiff to parent number ' .
4048                                                   ($i+1) . ': ' . substr($par,0,7)},
4049                                       $i+1) .
4050                               "&nbsp;</th>\n";
4051                 }
4052                 print "</tr></thead>\n<tbody>\n";
4053         }
4054
4055         my $alternate = 1;
4056         my $patchno = 0;
4057         foreach my $line (@{$difftree}) {
4058                 my $diff = parsed_difftree_line($line);
4059
4060                 if ($alternate) {
4061                         print "<tr class=\"dark\">\n";
4062                 } else {
4063                         print "<tr class=\"light\">\n";
4064                 }
4065                 $alternate ^= 1;
4066
4067                 if (exists $diff->{'nparents'}) { # combined diff
4068
4069                         fill_from_file_info($diff, @parents)
4070                                 unless exists $diff->{'from_file'};
4071
4072                         if (!is_deleted($diff)) {
4073                                 # file exists in the result (child) commit
4074                                 print "<td>" .
4075                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4076                                                              file_name=>$diff->{'to_file'},
4077                                                              hash_base=>$hash),
4078                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4079                                       "</td>\n";
4080                         } else {
4081                                 print "<td>" .
4082                                       esc_path($diff->{'to_file'}) .
4083                                       "</td>\n";
4084                         }
4085
4086                         if ($action eq 'commitdiff') {
4087                                 # link to patch
4088                                 $patchno++;
4089                                 print "<td class=\"link\">" .
4090                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4091                                       " | " .
4092                                       "</td>\n";
4093                         }
4094
4095                         my $has_history = 0;
4096                         my $not_deleted = 0;
4097                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4098                                 my $hash_parent = $parents[$i];
4099                                 my $from_hash = $diff->{'from_id'}[$i];
4100                                 my $from_path = $diff->{'from_file'}[$i];
4101                                 my $status = $diff->{'status'}[$i];
4102
4103                                 $has_history ||= ($status ne 'A');
4104                                 $not_deleted ||= ($status ne 'D');
4105
4106                                 if ($status eq 'A') {
4107                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4108                                 } elsif ($status eq 'D') {
4109                                         print "<td class=\"link\">" .
4110                                               $cgi->a({-href => href(action=>"blob",
4111                                                                      hash_base=>$hash,
4112                                                                      hash=>$from_hash,
4113                                                                      file_name=>$from_path)},
4114                                                       "blob" . ($i+1)) .
4115                                               " | </td>\n";
4116                                 } else {
4117                                         if ($diff->{'to_id'} eq $from_hash) {
4118                                                 print "<td class=\"link nochange\">";
4119                                         } else {
4120                                                 print "<td class=\"link\">";
4121                                         }
4122                                         print $cgi->a({-href => href(action=>"blobdiff",
4123                                                                      hash=>$diff->{'to_id'},
4124                                                                      hash_parent=>$from_hash,
4125                                                                      hash_base=>$hash,
4126                                                                      hash_parent_base=>$hash_parent,
4127                                                                      file_name=>$diff->{'to_file'},
4128                                                                      file_parent=>$from_path)},
4129                                                       "diff" . ($i+1)) .
4130                                               " | </td>\n";
4131                                 }
4132                         }
4133
4134                         print "<td class=\"link\">";
4135                         if ($not_deleted) {
4136                                 print $cgi->a({-href => href(action=>"blob",
4137                                                              hash=>$diff->{'to_id'},
4138                                                              file_name=>$diff->{'to_file'},
4139                                                              hash_base=>$hash)},
4140                                               "blob");
4141                                 print " | " if ($has_history);
4142                         }
4143                         if ($has_history) {
4144                                 print $cgi->a({-href => href(action=>"history",
4145                                                              file_name=>$diff->{'to_file'},
4146                                                              hash_base=>$hash)},
4147                                               "history");
4148                         }
4149                         print "</td>\n";
4150
4151                         print "</tr>\n";
4152                         next; # instead of 'else' clause, to avoid extra indent
4153                 }
4154                 # else ordinary diff
4155
4156                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4157                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4158                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4159                         $to_mode_oct = oct $diff->{'to_mode'};
4160                         if (S_ISREG($to_mode_oct)) { # only for regular file
4161                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4162                         }
4163                         $to_file_type = file_type($diff->{'to_mode'});
4164                 }
4165                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4166                         $from_mode_oct = oct $diff->{'from_mode'};
4167                         if (S_ISREG($to_mode_oct)) { # only for regular file
4168                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4169                         }
4170                         $from_file_type = file_type($diff->{'from_mode'});
4171                 }
4172
4173                 if ($diff->{'status'} eq "A") { # created
4174                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4175                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4176                         $mode_chng   .= "]</span>";
4177                         print "<td>";
4178                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4179                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4180                                       -class => "list"}, esc_path($diff->{'file'}));
4181                         print "</td>\n";
4182                         print "<td>$mode_chng</td>\n";
4183                         print "<td class=\"link\">";
4184                         if ($action eq 'commitdiff') {
4185                                 # link to patch
4186                                 $patchno++;
4187                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4188                                 print " | ";
4189                         }
4190                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4191                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4192                                       "blob");
4193                         print "</td>\n";
4194
4195                 } elsif ($diff->{'status'} eq "D") { # deleted
4196                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4197                         print "<td>";
4198                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4199                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4200                                        -class => "list"}, esc_path($diff->{'file'}));
4201                         print "</td>\n";
4202                         print "<td>$mode_chng</td>\n";
4203                         print "<td class=\"link\">";
4204                         if ($action eq 'commitdiff') {
4205                                 # link to patch
4206                                 $patchno++;
4207                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4208                                 print " | ";
4209                         }
4210                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4211                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4212                                       "blob") . " | ";
4213                         if ($have_blame) {
4214                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4215                                                              file_name=>$diff->{'file'})},
4216                                               "blame") . " | ";
4217                         }
4218                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4219                                                      file_name=>$diff->{'file'})},
4220                                       "history");
4221                         print "</td>\n";
4222
4223                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4224                         my $mode_chnge = "";
4225                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4226                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4227                                 if ($from_file_type ne $to_file_type) {
4228                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4229                                 }
4230                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4231                                         if ($from_mode_str && $to_mode_str) {
4232                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4233                                         } elsif ($to_mode_str) {
4234                                                 $mode_chnge .= " mode: $to_mode_str";
4235                                         }
4236                                 }
4237                                 $mode_chnge .= "]</span>\n";
4238                         }
4239                         print "<td>";
4240                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4241                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4242                                       -class => "list"}, esc_path($diff->{'file'}));
4243                         print "</td>\n";
4244                         print "<td>$mode_chnge</td>\n";
4245                         print "<td class=\"link\">";
4246                         if ($action eq 'commitdiff') {
4247                                 # link to patch
4248                                 $patchno++;
4249                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4250                                       " | ";
4251                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4252                                 # "commit" view and modified file (not onlu mode changed)
4253                                 print $cgi->a({-href => href(action=>"blobdiff",
4254                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4255                                                              hash_base=>$hash, hash_parent_base=>$parent,
4256                                                              file_name=>$diff->{'file'})},
4257                                               "diff") .
4258                                       " | ";
4259                         }
4260                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4261                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4262                                        "blob") . " | ";
4263                         if ($have_blame) {
4264                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4265                                                              file_name=>$diff->{'file'})},
4266                                               "blame") . " | ";
4267                         }
4268                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4269                                                      file_name=>$diff->{'file'})},
4270                                       "history");
4271                         print "</td>\n";
4272
4273                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4274                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4275                         my $nstatus = $status_name{$diff->{'status'}};
4276                         my $mode_chng = "";
4277                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4278                                 # mode also for directories, so we cannot use $to_mode_str
4279                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4280                         }
4281                         print "<td>" .
4282                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4283                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4284                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4285                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4286                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4287                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4288                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4289                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4290                               "<td class=\"link\">";
4291                         if ($action eq 'commitdiff') {
4292                                 # link to patch
4293                                 $patchno++;
4294                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4295                                       " | ";
4296                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4297                                 # "commit" view and modified file (not only pure rename or copy)
4298                                 print $cgi->a({-href => href(action=>"blobdiff",
4299                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4300                                                              hash_base=>$hash, hash_parent_base=>$parent,
4301                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4302                                               "diff") .
4303                                       " | ";
4304                         }
4305                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4306                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4307                                       "blob") . " | ";
4308                         if ($have_blame) {
4309                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4310                                                              file_name=>$diff->{'to_file'})},
4311                                               "blame") . " | ";
4312                         }
4313                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4314                                                     file_name=>$diff->{'to_file'})},
4315                                       "history");
4316                         print "</td>\n";
4317
4318                 } # we should not encounter Unmerged (U) or Unknown (X) status
4319                 print "</tr>\n";
4320         }
4321         print "</tbody>" if $has_header;
4322         print "</table>\n";
4323 }
4324
4325 sub git_patchset_body {
4326         my ($fd, $difftree, $hash, @hash_parents) = @_;
4327         my ($hash_parent) = $hash_parents[0];
4328
4329         my $is_combined = (@hash_parents > 1);
4330         my $patch_idx = 0;
4331         my $patch_number = 0;
4332         my $patch_line;
4333         my $diffinfo;
4334         my $to_name;
4335         my (%from, %to);
4336
4337         print "<div class=\"patchset\">\n";
4338
4339         # skip to first patch
4340         while ($patch_line = <$fd>) {
4341                 chomp $patch_line;
4342
4343                 last if ($patch_line =~ m/^diff /);
4344         }
4345
4346  PATCH:
4347         while ($patch_line) {
4348
4349                 # parse "git diff" header line
4350                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4351                         # $1 is from_name, which we do not use
4352                         $to_name = unquote($2);
4353                         $to_name =~ s!^b/!!;
4354                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4355                         # $1 is 'cc' or 'combined', which we do not use
4356                         $to_name = unquote($2);
4357                 } else {
4358                         $to_name = undef;
4359                 }
4360
4361                 # check if current patch belong to current raw line
4362                 # and parse raw git-diff line if needed
4363                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4364                         # this is continuation of a split patch
4365                         print "<div class=\"patch cont\">\n";
4366                 } else {
4367                         # advance raw git-diff output if needed
4368                         $patch_idx++ if defined $diffinfo;
4369
4370                         # read and prepare patch information
4371                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4372
4373                         # compact combined diff output can have some patches skipped
4374                         # find which patch (using pathname of result) we are at now;
4375                         if ($is_combined) {
4376                                 while ($to_name ne $diffinfo->{'to_file'}) {
4377                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4378                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4379                                               "</div>\n";  # class="patch"
4380
4381                                         $patch_idx++;
4382                                         $patch_number++;
4383
4384                                         last if $patch_idx > $#$difftree;
4385                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4386                                 }
4387                         }
4388
4389                         # modifies %from, %to hashes
4390                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4391
4392                         # this is first patch for raw difftree line with $patch_idx index
4393                         # we index @$difftree array from 0, but number patches from 1
4394                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4395                 }
4396
4397                 # git diff header
4398                 #assert($patch_line =~ m/^diff /) if DEBUG;
4399                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4400                 $patch_number++;
4401                 # print "git diff" header
4402                 print format_git_diff_header_line($patch_line, $diffinfo,
4403                                                   \%from, \%to);
4404
4405                 # print extended diff header
4406                 print "<div class=\"diff extended_header\">\n";
4407         EXTENDED_HEADER:
4408                 while ($patch_line = <$fd>) {
4409                         chomp $patch_line;
4410
4411                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4412
4413                         print format_extended_diff_header_line($patch_line, $diffinfo,
4414                                                                \%from, \%to);
4415                 }
4416                 print "</div>\n"; # class="diff extended_header"
4417
4418                 # from-file/to-file diff header
4419                 if (! $patch_line) {
4420                         print "</div>\n"; # class="patch"
4421                         last PATCH;
4422                 }
4423                 next PATCH if ($patch_line =~ m/^diff /);
4424                 #assert($patch_line =~ m/^---/) if DEBUG;
4425
4426                 my $last_patch_line = $patch_line;
4427                 $patch_line = <$fd>;
4428                 chomp $patch_line;
4429                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4430
4431                 print format_diff_from_to_header($last_patch_line, $patch_line,
4432                                                  $diffinfo, \%from, \%to,
4433                                                  @hash_parents);
4434
4435                 # the patch itself
4436         LINE:
4437                 while ($patch_line = <$fd>) {
4438                         chomp $patch_line;
4439
4440                         next PATCH if ($patch_line =~ m/^diff /);
4441
4442                         print format_diff_line($patch_line, \%from, \%to);
4443                 }
4444
4445         } continue {
4446                 print "</div>\n"; # class="patch"
4447         }
4448
4449         # for compact combined (--cc) format, with chunk and patch simpliciaction
4450         # patchset might be empty, but there might be unprocessed raw lines
4451         for (++$patch_idx if $patch_number > 0;
4452              $patch_idx < @$difftree;
4453              ++$patch_idx) {
4454                 # read and prepare patch information
4455                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4456
4457                 # generate anchor for "patch" links in difftree / whatchanged part
4458                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4459                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4460                       "</div>\n";  # class="patch"
4461
4462                 $patch_number++;
4463         }
4464
4465         if ($patch_number == 0) {
4466                 if (@hash_parents > 1) {
4467                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4468                 } else {
4469                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4470                 }
4471         }
4472
4473         print "</div>\n"; # class="patchset"
4474 }
4475
4476 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4477
4478 # fills project list info (age, description, owner, forks) for each
4479 # project in the list, removing invalid projects from returned list
4480 # NOTE: modifies $projlist, but does not remove entries from it
4481 sub fill_project_list_info {
4482         my ($projlist, $check_forks) = @_;
4483         my @projects;
4484
4485         my $show_ctags = gitweb_check_feature('ctags');
4486  PROJECT:
4487         foreach my $pr (@$projlist) {
4488                 my (@activity) = git_get_last_activity($pr->{'path'});
4489                 unless (@activity) {
4490                         next PROJECT;
4491                 }
4492                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4493                 if (!defined $pr->{'descr'}) {
4494                         my $descr = git_get_project_description($pr->{'path'}) || "";
4495                         $descr = to_utf8($descr);
4496                         $pr->{'descr_long'} = $descr;
4497                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4498                 }
4499                 if (!defined $pr->{'owner'}) {
4500                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4501                 }
4502                 if ($check_forks) {
4503                         my $pname = $pr->{'path'};
4504                         if (($pname =~ s/\.git$//) &&
4505                             ($pname !~ /\/$/) &&
4506                             (-d "$projectroot/$pname")) {
4507                                 $pr->{'forks'} = "-d $projectroot/$pname";
4508                         } else {
4509                                 $pr->{'forks'} = 0;
4510                         }
4511                 }
4512                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4513                 push @projects, $pr;
4514         }
4515
4516         return @projects;
4517 }
4518
4519 # print 'sort by' <th> element, generating 'sort by $name' replay link
4520 # if that order is not selected
4521 sub print_sort_th {
4522         print format_sort_th(@_);
4523 }
4524
4525 sub format_sort_th {
4526         my ($name, $order, $header) = @_;
4527         my $sort_th = "";
4528         $header ||= ucfirst($name);
4529
4530         if ($order eq $name) {
4531                 $sort_th .= "<th>$header</th>\n";
4532         } else {
4533                 $sort_th .= "<th>" .
4534                             $cgi->a({-href => href(-replay=>1, order=>$name),
4535                                      -class => "header"}, $header) .
4536                             "</th>\n";
4537         }
4538
4539         return $sort_th;
4540 }
4541
4542 sub git_project_list_body {
4543         # actually uses global variable $project
4544         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4545
4546         my $check_forks = gitweb_check_feature('forks');
4547         my @projects = fill_project_list_info($projlist, $check_forks);
4548
4549         $order ||= $default_projects_order;
4550         $from = 0 unless defined $from;
4551         $to = $#projects if (!defined $to || $#projects < $to);
4552
4553         my %order_info = (
4554                 project => { key => 'path', type => 'str' },
4555                 descr => { key => 'descr_long', type => 'str' },
4556                 owner => { key => 'owner', type => 'str' },
4557                 age => { key => 'age', type => 'num' }
4558         );
4559         my $oi = $order_info{$order};
4560         if ($oi->{'type'} eq 'str') {
4561                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4562         } else {
4563                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4564         }
4565
4566         my $show_ctags = gitweb_check_feature('ctags');
4567         if ($show_ctags) {
4568                 my %ctags;
4569                 foreach my $p (@projects) {
4570                         foreach my $ct (keys %{$p->{'ctags'}}) {
4571                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4572                         }
4573                 }
4574                 my $cloud = git_populate_project_tagcloud(\%ctags);
4575                 print git_show_project_tagcloud($cloud, 64);
4576         }
4577
4578         print "<table class=\"project_list\">\n";
4579         unless ($no_header) {
4580                 print "<tr>\n";
4581                 if ($check_forks) {
4582                         print "<th></th>\n";
4583                 }
4584                 print_sort_th('project', $order, 'Project');
4585                 print_sort_th('descr', $order, 'Description');
4586                 print_sort_th('owner', $order, 'Owner');
4587                 print_sort_th('age', $order, 'Last Change');
4588                 print "<th></th>\n" . # for links
4589                       "</tr>\n";
4590         }
4591         my $alternate = 1;
4592         my $tagfilter = $cgi->param('by_tag');
4593         for (my $i = $from; $i <= $to; $i++) {
4594                 my $pr = $projects[$i];
4595
4596                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4597                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4598                         and not $pr->{'descr_long'} =~ /$searchtext/;
4599                 # Weed out forks or non-matching entries of search
4600                 if ($check_forks) {
4601                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4602                         $forkbase="^$forkbase" if $forkbase;
4603                         next if not $searchtext and not $tagfilter and $show_ctags
4604                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4605                 }
4606
4607                 if ($alternate) {
4608                         print "<tr class=\"dark\">\n";
4609                 } else {
4610                         print "<tr class=\"light\">\n";
4611                 }
4612                 $alternate ^= 1;
4613                 if ($check_forks) {
4614                         print "<td>";
4615                         if ($pr->{'forks'}) {
4616                                 print "<!-- $pr->{'forks'} -->\n";
4617                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4618                         }
4619                         print "</td>\n";
4620                 }
4621                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4622                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4623                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4624                                         -class => "list", -title => $pr->{'descr_long'}},
4625                                         esc_html($pr->{'descr'})) . "</td>\n" .
4626                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4627                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4628                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4629                       "<td class=\"link\">" .
4630                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4631                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4632                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4633                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4634                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4635                       "</td>\n" .
4636                       "</tr>\n";
4637         }
4638         if (defined $extra) {
4639                 print "<tr>\n";
4640                 if ($check_forks) {
4641                         print "<td></td>\n";
4642                 }
4643                 print "<td colspan=\"5\">$extra</td>\n" .
4644                       "</tr>\n";
4645         }
4646         print "</table>\n";
4647 }
4648
4649 sub git_log_body {
4650         # uses global variable $project
4651         my ($commitlist, $from, $to, $refs, $extra) = @_;
4652
4653         $from = 0 unless defined $from;
4654         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4655
4656         for (my $i = 0; $i <= $to; $i++) {
4657                 my %co = %{$commitlist->[$i]};
4658                 next if !%co;
4659                 my $commit = $co{'id'};
4660                 my $ref = format_ref_marker($refs, $commit);
4661                 my %ad = parse_date($co{'author_epoch'});
4662                 git_print_header_div('commit',
4663                                "<span class=\"age\">$co{'age_string'}</span>" .
4664                                esc_html($co{'title'}) . $ref,
4665                                $commit);
4666                 print "<div class=\"title_text\">\n" .
4667                       "<div class=\"log_link\">\n" .
4668                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4669                       " | " .
4670                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4671                       " | " .
4672                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4673                       "<br/>\n" .
4674                       "</div>\n";
4675                       git_print_authorship(\%co, -tag => 'span');
4676                       print "<br/>\n</div>\n";
4677
4678                 print "<div class=\"log_body\">\n";
4679                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4680                 print "</div>\n";
4681         }
4682         if ($extra) {
4683                 print "<div class=\"page_nav\">\n";
4684                 print "$extra\n";
4685                 print "</div>\n";
4686         }
4687 }
4688
4689 sub git_shortlog_body {
4690         # uses global variable $project
4691         my ($commitlist, $from, $to, $refs, $extra) = @_;
4692
4693         $from = 0 unless defined $from;
4694         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4695
4696         print "<table class=\"shortlog\">\n";
4697         my $alternate = 1;
4698         for (my $i = $from; $i <= $to; $i++) {
4699                 my %co = %{$commitlist->[$i]};
4700                 my $commit = $co{'id'};
4701                 my $ref = format_ref_marker($refs, $commit);
4702                 if ($alternate) {
4703                         print "<tr class=\"dark\">\n";
4704                 } else {
4705                         print "<tr class=\"light\">\n";
4706                 }
4707                 $alternate ^= 1;
4708                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4709                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4710                       format_author_html('td', \%co, 10) . "<td>";
4711                 print format_subject_html($co{'title'}, $co{'title_short'},
4712                                           href(action=>"commit", hash=>$commit), $ref);
4713                 print "</td>\n" .
4714                       "<td class=\"link\">" .
4715                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4716                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4717                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4718                 my $snapshot_links = format_snapshot_links($commit);
4719                 if (defined $snapshot_links) {
4720                         print " | " . $snapshot_links;
4721                 }
4722                 print "</td>\n" .
4723                       "</tr>\n";
4724         }
4725         if (defined $extra) {
4726                 print "<tr>\n" .
4727                       "<td colspan=\"4\">$extra</td>\n" .
4728                       "</tr>\n";
4729         }
4730         print "</table>\n";
4731 }
4732
4733 sub git_history_body {
4734         # Warning: assumes constant type (blob or tree) during history
4735         my ($commitlist, $from, $to, $refs, $extra,
4736             $file_name, $file_hash, $ftype) = @_;
4737
4738         $from = 0 unless defined $from;
4739         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4740
4741         print "<table class=\"history\">\n";
4742         my $alternate = 1;
4743         for (my $i = $from; $i <= $to; $i++) {
4744                 my %co = %{$commitlist->[$i]};
4745                 if (!%co) {
4746                         next;
4747                 }
4748                 my $commit = $co{'id'};
4749
4750                 my $ref = format_ref_marker($refs, $commit);
4751
4752                 if ($alternate) {
4753                         print "<tr class=\"dark\">\n";
4754                 } else {
4755                         print "<tr class=\"light\">\n";
4756                 }
4757                 $alternate ^= 1;
4758                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4759         # shortlog:   format_author_html('td', \%co, 10)
4760                       format_author_html('td', \%co, 15, 3) . "<td>";
4761                 # originally git_history used chop_str($co{'title'}, 50)
4762                 print format_subject_html($co{'title'}, $co{'title_short'},
4763                                           href(action=>"commit", hash=>$commit), $ref);
4764                 print "</td>\n" .
4765                       "<td class=\"link\">" .
4766                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4767                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4768
4769                 if ($ftype eq 'blob') {
4770                         my $blob_current = $file_hash;
4771                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4772                         if (defined $blob_current && defined $blob_parent &&
4773                                         $blob_current ne $blob_parent) {
4774                                 print " | " .
4775                                         $cgi->a({-href => href(action=>"blobdiff",
4776                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4777                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4778                                                                file_name=>$file_name)},
4779                                                 "diff to current");
4780                         }
4781                 }
4782                 print "</td>\n" .
4783                       "</tr>\n";
4784         }
4785         if (defined $extra) {
4786                 print "<tr>\n" .
4787                       "<td colspan=\"4\">$extra</td>\n" .
4788                       "</tr>\n";
4789         }
4790         print "</table>\n";
4791 }
4792
4793 sub git_tags_body {
4794         # uses global variable $project
4795         my ($taglist, $from, $to, $extra) = @_;
4796         $from = 0 unless defined $from;
4797         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4798
4799         print "<table class=\"tags\">\n";
4800         my $alternate = 1;
4801         for (my $i = $from; $i <= $to; $i++) {
4802                 my $entry = $taglist->[$i];
4803                 my %tag = %$entry;
4804                 my $comment = $tag{'subject'};
4805                 my $comment_short;
4806                 if (defined $comment) {
4807                         $comment_short = chop_str($comment, 30, 5);
4808                 }
4809                 if ($alternate) {
4810                         print "<tr class=\"dark\">\n";
4811                 } else {
4812                         print "<tr class=\"light\">\n";
4813                 }
4814                 $alternate ^= 1;
4815                 if (defined $tag{'age'}) {
4816                         print "<td><i>$tag{'age'}</i></td>\n";
4817                 } else {
4818                         print "<td></td>\n";
4819                 }
4820                 print "<td>" .
4821                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4822                                -class => "list name"}, esc_html($tag{'name'})) .
4823                       "</td>\n" .
4824                       "<td>";
4825                 if (defined $comment) {
4826                         print format_subject_html($comment, $comment_short,
4827                                                   href(action=>"tag", hash=>$tag{'id'}));
4828                 }
4829                 print "</td>\n" .
4830                       "<td class=\"selflink\">";
4831                 if ($tag{'type'} eq "tag") {
4832                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4833                 } else {
4834                         print "&nbsp;";
4835                 }
4836                 print "</td>\n" .
4837                       "<td class=\"link\">" . " | " .
4838                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4839                 if ($tag{'reftype'} eq "commit") {
4840                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4841                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4842                 } elsif ($tag{'reftype'} eq "blob") {
4843                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4844                 }
4845                 print "</td>\n" .
4846                       "</tr>";
4847         }
4848         if (defined $extra) {
4849                 print "<tr>\n" .
4850                       "<td colspan=\"5\">$extra</td>\n" .
4851                       "</tr>\n";
4852         }
4853         print "</table>\n";
4854 }
4855
4856 sub git_heads_body {
4857         # uses global variable $project
4858         my ($headlist, $head, $from, $to, $extra) = @_;
4859         $from = 0 unless defined $from;
4860         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4861
4862         print "<table class=\"heads\">\n";
4863         my $alternate = 1;
4864         for (my $i = $from; $i <= $to; $i++) {
4865                 my $entry = $headlist->[$i];
4866                 my %ref = %$entry;
4867                 my $curr = $ref{'id'} eq $head;
4868                 if ($alternate) {
4869                         print "<tr class=\"dark\">\n";
4870                 } else {
4871                         print "<tr class=\"light\">\n";
4872                 }
4873                 $alternate ^= 1;
4874                 print "<td><i>$ref{'age'}</i></td>\n" .
4875                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4876                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4877                                -class => "list name"},esc_html($ref{'name'})) .
4878                       "</td>\n" .
4879                       "<td class=\"link\">" .
4880                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4881                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4882                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4883                       "</td>\n" .
4884                       "</tr>";
4885         }
4886         if (defined $extra) {
4887                 print "<tr>\n" .
4888                       "<td colspan=\"3\">$extra</td>\n" .
4889                       "</tr>\n";
4890         }
4891         print "</table>\n";
4892 }
4893
4894 sub git_search_grep_body {
4895         my ($commitlist, $from, $to, $extra) = @_;
4896         $from = 0 unless defined $from;
4897         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4898
4899         print "<table class=\"commit_search\">\n";
4900         my $alternate = 1;
4901         for (my $i = $from; $i <= $to; $i++) {
4902                 my %co = %{$commitlist->[$i]};
4903                 if (!%co) {
4904                         next;
4905                 }
4906                 my $commit = $co{'id'};
4907                 if ($alternate) {
4908                         print "<tr class=\"dark\">\n";
4909                 } else {
4910                         print "<tr class=\"light\">\n";
4911                 }
4912                 $alternate ^= 1;
4913                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4914                       format_author_html('td', \%co, 15, 5) .
4915                       "<td>" .
4916                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4917                                -class => "list subject"},
4918                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4919                 my $comment = $co{'comment'};
4920                 foreach my $line (@$comment) {
4921                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4922                                 my ($lead, $match, $trail) = ($1, $2, $3);
4923                                 $match = chop_str($match, 70, 5, 'center');
4924                                 my $contextlen = int((80 - length($match))/2);
4925                                 $contextlen = 30 if ($contextlen > 30);
4926                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4927                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4928
4929                                 $lead  = esc_html($lead);
4930                                 $match = esc_html($match);
4931                                 $trail = esc_html($trail);
4932
4933                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4934                         }
4935                 }
4936                 print "</td>\n" .
4937                       "<td class=\"link\">" .
4938                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4939                       " | " .
4940                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4941                       " | " .
4942                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4943                 print "</td>\n" .
4944                       "</tr>\n";
4945         }
4946         if (defined $extra) {
4947                 print "<tr>\n" .
4948                       "<td colspan=\"3\">$extra</td>\n" .
4949                       "</tr>\n";
4950         }
4951         print "</table>\n";
4952 }
4953
4954 ## ======================================================================
4955 ## ======================================================================
4956 ## actions
4957
4958 sub git_project_list {
4959         my $order = $input_params{'order'};
4960         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4961                 die_error(400, "Unknown order parameter");
4962         }
4963
4964         my @list = git_get_projects_list();
4965         if (!@list) {
4966                 die_error(404, "No projects found");
4967         }
4968
4969         git_header_html();
4970         if (defined $home_text && -f $home_text) {
4971                 print "<div class=\"index_include\">\n";
4972                 insert_file($home_text);
4973                 print "</div>\n";
4974         }
4975         print $cgi->startform(-method => "get") .
4976               "<p class=\"projsearch\">Search:\n" .
4977               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4978               "</p>" .
4979               $cgi->end_form() . "\n";
4980         git_project_list_body(\@list, $order);
4981         git_footer_html();
4982 }
4983
4984 sub git_forks {
4985         my $order = $input_params{'order'};
4986         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4987                 die_error(400, "Unknown order parameter");
4988         }
4989
4990         my @list = git_get_projects_list($project);
4991         if (!@list) {
4992                 die_error(404, "No forks found");
4993         }
4994
4995         git_header_html();
4996         git_print_page_nav('','');
4997         git_print_header_div('summary', "$project forks");
4998         git_project_list_body(\@list, $order);
4999         git_footer_html();
5000 }
5001
5002 sub git_project_index {
5003         my @projects = git_get_projects_list($project);
5004
5005         print $cgi->header(
5006                 -type => 'text/plain',
5007                 -charset => 'utf-8',
5008                 -content_disposition => 'inline; filename="index.aux"');
5009
5010         foreach my $pr (@projects) {
5011                 if (!exists $pr->{'owner'}) {
5012                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5013                 }
5014
5015                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5016                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5017                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5018                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5019                 $path  =~ s/ /\+/g;
5020                 $owner =~ s/ /\+/g;
5021
5022                 print "$path $owner\n";
5023         }
5024 }
5025
5026 sub git_summary {
5027         my $descr = git_get_project_description($project) || "none";
5028         my %co = parse_commit("HEAD");
5029         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5030         my $head = $co{'id'};
5031
5032         my $owner = git_get_project_owner($project);
5033
5034         my $refs = git_get_references();
5035         # These get_*_list functions return one more to allow us to see if
5036         # there are more ...
5037         my @taglist  = git_get_tags_list(16);
5038         my @headlist = git_get_heads_list(16);
5039         my @forklist;
5040         my $check_forks = gitweb_check_feature('forks');
5041
5042         if ($check_forks) {
5043                 @forklist = git_get_projects_list($project);
5044         }
5045
5046         git_header_html();
5047         git_print_page_nav('summary','', $head);
5048
5049         print "<div class=\"title\">&nbsp;</div>\n";
5050         print "<table class=\"projects_list\">\n" .
5051               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5052               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5053         if (defined $cd{'rfc2822'}) {
5054                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5055         }
5056
5057         # use per project git URL list in $projectroot/$project/cloneurl
5058         # or make project git URL from git base URL and project name
5059         my $url_tag = "URL";
5060         my @url_list = git_get_project_url_list($project);
5061         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5062         foreach my $git_url (@url_list) {
5063                 next unless $git_url;
5064                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5065                 $url_tag = "";
5066         }
5067
5068         # Tag cloud
5069         my $show_ctags = gitweb_check_feature('ctags');
5070         if ($show_ctags) {
5071                 my $ctags = git_get_project_ctags($project);
5072                 my $cloud = git_populate_project_tagcloud($ctags);
5073                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5074                 print "</td>\n<td>" unless %$ctags;
5075                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5076                 print "</td>\n<td>" if %$ctags;
5077                 print git_show_project_tagcloud($cloud, 48);
5078                 print "</td></tr>";
5079         }
5080
5081         print "</table>\n";
5082
5083         # If XSS prevention is on, we don't include README.html.
5084         # TODO: Allow a readme in some safe format.
5085         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5086                 print "<div class=\"title\">readme</div>\n" .
5087                       "<div class=\"readme\">\n";
5088                 insert_file("$projectroot/$project/README.html");
5089                 print "\n</div>\n"; # class="readme"
5090         }
5091
5092         # we need to request one more than 16 (0..15) to check if
5093         # those 16 are all
5094         my @commitlist = $head ? parse_commits($head, 17) : ();
5095         if (@commitlist) {
5096                 git_print_header_div('shortlog');
5097                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5098                                   $#commitlist <=  15 ? undef :
5099                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5100         }
5101
5102         if (@taglist) {
5103                 git_print_header_div('tags');
5104                 git_tags_body(\@taglist, 0, 15,
5105                               $#taglist <=  15 ? undef :
5106                               $cgi->a({-href => href(action=>"tags")}, "..."));
5107         }
5108
5109         if (@headlist) {
5110                 git_print_header_div('heads');
5111                 git_heads_body(\@headlist, $head, 0, 15,
5112                                $#headlist <= 15 ? undef :
5113                                $cgi->a({-href => href(action=>"heads")}, "..."));
5114         }
5115
5116         if (@forklist) {
5117                 git_print_header_div('forks');
5118                 git_project_list_body(\@forklist, 'age', 0, 15,
5119                                       $#forklist <= 15 ? undef :
5120                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5121                                       'no_header');
5122         }
5123
5124         git_footer_html();
5125 }
5126
5127 sub git_tag {
5128         my $head = git_get_head_hash($project);
5129         git_header_html();
5130         git_print_page_nav('','', $head,undef,$head);
5131         my %tag = parse_tag($hash);
5132
5133         if (! %tag) {
5134                 die_error(404, "Unknown tag object");
5135         }
5136
5137         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5138         print "<div class=\"title_text\">\n" .
5139               "<table class=\"object_header\">\n" .
5140               "<tr>\n" .
5141               "<td>object</td>\n" .
5142               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5143                                $tag{'object'}) . "</td>\n" .
5144               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5145                                               $tag{'type'}) . "</td>\n" .
5146               "</tr>\n";
5147         if (defined($tag{'author'})) {
5148                 git_print_authorship_rows(\%tag, 'author');
5149         }
5150         print "</table>\n\n" .
5151               "</div>\n";
5152         print "<div class=\"page_body\">";
5153         my $comment = $tag{'comment'};
5154         foreach my $line (@$comment) {
5155                 chomp $line;
5156                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5157         }
5158         print "</div>\n";
5159         git_footer_html();
5160 }
5161
5162 sub git_blame_common {
5163         my $format = shift || 'porcelain';
5164         if ($format eq 'porcelain' && $cgi->param('js')) {
5165                 $format = 'incremental';
5166                 $action = 'blame_incremental'; # for page title etc
5167         }
5168
5169         # permissions
5170         gitweb_check_feature('blame')
5171                 or die_error(403, "Blame view not allowed");
5172
5173         # error checking
5174         die_error(400, "No file name given") unless $file_name;
5175         $hash_base ||= git_get_head_hash($project);
5176         die_error(404, "Couldn't find base commit") unless $hash_base;
5177         my %co = parse_commit($hash_base)
5178                 or die_error(404, "Commit not found");
5179         my $ftype = "blob";
5180         if (!defined $hash) {
5181                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5182                         or die_error(404, "Error looking up file");
5183         } else {
5184                 $ftype = git_get_type($hash);
5185                 if ($ftype !~ "blob") {
5186                         die_error(400, "Object is not a blob");
5187                 }
5188         }
5189
5190         my $fd;
5191         if ($format eq 'incremental') {
5192                 # get file contents (as base)
5193                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5194                         or die_error(500, "Open git-cat-file failed");
5195         } elsif ($format eq 'data') {
5196                 # run git-blame --incremental
5197                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5198                         $hash_base, "--", $file_name
5199                         or die_error(500, "Open git-blame --incremental failed");
5200         } else {
5201                 # run git-blame --porcelain
5202                 open $fd, "-|", git_cmd(), "blame", '-p',
5203                         $hash_base, '--', $file_name
5204                         or die_error(500, "Open git-blame --porcelain failed");
5205         }
5206
5207         # incremental blame data returns early
5208         if ($format eq 'data') {
5209                 print $cgi->header(
5210                         -type=>"text/plain", -charset => "utf-8",
5211                         -status=> "200 OK");
5212                 local $| = 1; # output autoflush
5213                 print while <$fd>;
5214                 close $fd
5215                         or print "ERROR $!\n";
5216
5217                 print 'END';
5218                 if (defined $t0 && gitweb_check_feature('timed')) {
5219                         print ' '.
5220                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5221                               ' '.$number_of_git_cmds;
5222                 }
5223                 print "\n";
5224
5225                 return;
5226         }
5227
5228         # page header
5229         git_header_html();
5230         my $formats_nav =
5231                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5232                         "blob") .
5233                 " | ";
5234         if ($format eq 'incremental') {
5235                 $formats_nav .=
5236                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5237                                 "blame") . " (non-incremental)";
5238         } else {
5239                 $formats_nav .=
5240                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5241                                 "blame") . " (incremental)";
5242         }
5243         $formats_nav .=
5244                 " | " .
5245                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5246                         "history") .
5247                 " | " .
5248                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5249                         "HEAD");
5250         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5251         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5252         git_print_page_path($file_name, $ftype, $hash_base);
5253
5254         # page body
5255         if ($format eq 'incremental') {
5256                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5257                       "This page requires JavaScript to run.\n Use ".
5258                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5259                               'this page').
5260                       " instead.\n".
5261                       "</b></center></div>\n</noscript>\n";
5262
5263                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5264         }
5265
5266         print qq!<div class="page_body">\n!;
5267         print qq!<div id="progress_info">... / ...</div>\n!
5268                 if ($format eq 'incremental');
5269         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5270               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5271               qq!<thead>\n!.
5272               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5273               qq!</thead>\n!.
5274               qq!<tbody>\n!;
5275
5276         my @rev_color = qw(light dark);
5277         my $num_colors = scalar(@rev_color);
5278         my $current_color = 0;
5279
5280         if ($format eq 'incremental') {
5281                 my $color_class = $rev_color[$current_color];
5282
5283                 #contents of a file
5284                 my $linenr = 0;
5285         LINE:
5286                 while (my $line = <$fd>) {
5287                         chomp $line;
5288                         $linenr++;
5289
5290                         print qq!<tr id="l$linenr" class="$color_class">!.
5291                               qq!<td class="sha1"><a href=""> </a></td>!.
5292                               qq!<td class="linenr">!.
5293                               qq!<a class="linenr" href="">$linenr</a></td>!;
5294                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5295                         print qq!</tr>\n!;
5296                 }
5297
5298         } else { # porcelain, i.e. ordinary blame
5299                 my %metainfo = (); # saves information about commits
5300
5301                 # blame data
5302         LINE:
5303                 while (my $line = <$fd>) {
5304                         chomp $line;
5305                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5306                         # no <lines in group> for subsequent lines in group of lines
5307                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5308                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5309                         if (!exists $metainfo{$full_rev}) {
5310                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5311                         }
5312                         my $meta = $metainfo{$full_rev};
5313                         my $data;
5314                         while ($data = <$fd>) {
5315                                 chomp $data;
5316                                 last if ($data =~ s/^\t//); # contents of line
5317                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5318                                         $meta->{$1} = $2 unless exists $meta->{$1};
5319                                 }
5320                                 if ($data =~ /^previous /) {
5321                                         $meta->{'nprevious'}++;
5322                                 }
5323                         }
5324                         my $short_rev = substr($full_rev, 0, 8);
5325                         my $author = $meta->{'author'};
5326                         my %date =
5327                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5328                         my $date = $date{'iso-tz'};
5329                         if ($group_size) {
5330                                 $current_color = ($current_color + 1) % $num_colors;
5331                         }
5332                         my $tr_class = $rev_color[$current_color];
5333                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5334                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5335                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5336                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5337                         if ($group_size) {
5338                                 print "<td class=\"sha1\"";
5339                                 print " title=\"". esc_html($author) . ", $date\"";
5340                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5341                                 print ">";
5342                                 print $cgi->a({-href => href(action=>"commit",
5343                                                              hash=>$full_rev,
5344                                                              file_name=>$file_name)},
5345                                               esc_html($short_rev));
5346                                 if ($group_size >= 2) {
5347                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5348                                         if (@author_initials) {
5349                                                 print "<br />" .
5350                                                       esc_html(join('', @author_initials));
5351                                                 #           or join('.', ...)
5352                                         }
5353                                 }
5354                                 print "</td>\n";
5355                         }
5356                         # 'previous' <sha1 of parent commit> <filename at commit>
5357                         if (exists $meta->{'previous'} &&
5358                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5359                                 $meta->{'parent'} = $1;
5360                                 $meta->{'file_parent'} = unquote($2);
5361                         }
5362                         my $linenr_commit =
5363                                 exists($meta->{'parent'}) ?
5364                                 $meta->{'parent'} : $full_rev;
5365                         my $linenr_filename =
5366                                 exists($meta->{'file_parent'}) ?
5367                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5368                         my $blamed = href(action => 'blame',
5369                                           file_name => $linenr_filename,
5370                                           hash_base => $linenr_commit);
5371                         print "<td class=\"linenr\">";
5372                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5373                                         -class => "linenr" },
5374                                       esc_html($lineno));
5375                         print "</td>";
5376                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5377                         print "</tr>\n";
5378                 } # end while
5379
5380         }
5381
5382         # footer
5383         print "</tbody>\n".
5384               "</table>\n"; # class="blame"
5385         print "</div>\n";   # class="blame_body"
5386         close $fd
5387                 or print "Reading blob failed\n";
5388
5389         git_footer_html();
5390 }
5391
5392 sub git_blame {
5393         git_blame_common();
5394 }
5395
5396 sub git_blame_incremental {
5397         git_blame_common('incremental');
5398 }
5399
5400 sub git_blame_data {
5401         git_blame_common('data');
5402 }
5403
5404 sub git_tags {
5405         my $head = git_get_head_hash($project);
5406         git_header_html();
5407         git_print_page_nav('','', $head,undef,$head);
5408         git_print_header_div('summary', $project);
5409
5410         my @tagslist = git_get_tags_list();
5411         if (@tagslist) {
5412                 git_tags_body(\@tagslist);
5413         }
5414         git_footer_html();
5415 }
5416
5417 sub git_heads {
5418         my $head = git_get_head_hash($project);
5419         git_header_html();
5420         git_print_page_nav('','', $head,undef,$head);
5421         git_print_header_div('summary', $project);
5422
5423         my @headslist = git_get_heads_list();
5424         if (@headslist) {
5425                 git_heads_body(\@headslist, $head);
5426         }
5427         git_footer_html();
5428 }
5429
5430 sub git_blob_plain {
5431         my $type = shift;
5432         my $expires;
5433
5434         if (!defined $hash) {
5435                 if (defined $file_name) {
5436                         my $base = $hash_base || git_get_head_hash($project);
5437                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5438                                 or die_error(404, "Cannot find file");
5439                 } else {
5440                         die_error(400, "No file name defined");
5441                 }
5442         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5443                 # blobs defined by non-textual hash id's can be cached
5444                 $expires = "+1d";
5445         }
5446
5447         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5448                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5449
5450         # content-type (can include charset)
5451         $type = blob_contenttype($fd, $file_name, $type);
5452
5453         # "save as" filename, even when no $file_name is given
5454         my $save_as = "$hash";
5455         if (defined $file_name) {
5456                 $save_as = $file_name;
5457         } elsif ($type =~ m/^text\//) {
5458                 $save_as .= '.txt';
5459         }
5460
5461         # With XSS prevention on, blobs of all types except a few known safe
5462         # ones are served with "Content-Disposition: attachment" to make sure
5463         # they don't run in our security domain.  For certain image types,
5464         # blob view writes an <img> tag referring to blob_plain view, and we
5465         # want to be sure not to break that by serving the image as an
5466         # attachment (though Firefox 3 doesn't seem to care).
5467         my $sandbox = $prevent_xss &&
5468                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5469
5470         print $cgi->header(
5471                 -type => $type,
5472                 -expires => $expires,
5473                 -content_disposition =>
5474                         ($sandbox ? 'attachment' : 'inline')
5475                         . '; filename="' . $save_as . '"');
5476         local $/ = undef;
5477         binmode STDOUT, ':raw';
5478         print <$fd>;
5479         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5480         close $fd;
5481 }
5482
5483 sub git_blob {
5484         my $expires;
5485
5486         if (!defined $hash) {
5487                 if (defined $file_name) {
5488                         my $base = $hash_base || git_get_head_hash($project);
5489                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5490                                 or die_error(404, "Cannot find file");
5491                 } else {
5492                         die_error(400, "No file name defined");
5493                 }
5494         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5495                 # blobs defined by non-textual hash id's can be cached
5496                 $expires = "+1d";
5497         }
5498
5499         my $have_blame = gitweb_check_feature('blame');
5500         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5501                 or die_error(500, "Couldn't cat $file_name, $hash");
5502         my $mimetype = blob_mimetype($fd, $file_name);
5503         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5504         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5505                 close $fd;
5506                 return git_blob_plain($mimetype);
5507         }
5508         # we can have blame only for text/* mimetype
5509         $have_blame &&= ($mimetype =~ m!^text/!);
5510
5511         my $highlight = gitweb_check_feature('highlight');
5512         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5513         $fd = run_highlighter($fd, $highlight, $syntax)
5514                 if $syntax;
5515
5516         git_header_html(undef, $expires);
5517         my $formats_nav = '';
5518         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5519                 if (defined $file_name) {
5520                         if ($have_blame) {
5521                                 $formats_nav .=
5522                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5523                                                 "blame") .
5524                                         " | ";
5525                         }
5526                         $formats_nav .=
5527                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5528                                         "history") .
5529                                 " | " .
5530                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5531                                         "raw") .
5532                                 " | " .
5533                                 $cgi->a({-href => href(action=>"blob",
5534                                                        hash_base=>"HEAD", file_name=>$file_name)},
5535                                         "HEAD");
5536                 } else {
5537                         $formats_nav .=
5538                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5539                                         "raw");
5540                 }
5541                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5542                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5543         } else {
5544                 print "<div class=\"page_nav\">\n" .
5545                       "<br/><br/></div>\n" .
5546                       "<div class=\"title\">$hash</div>\n";
5547         }
5548         git_print_page_path($file_name, "blob", $hash_base);
5549         print "<div class=\"page_body\">\n";
5550         if ($mimetype =~ m!^image/!) {
5551                 print qq!<img type="$mimetype"!;
5552                 if ($file_name) {
5553                         print qq! alt="$file_name" title="$file_name"!;
5554                 }
5555                 print qq! src="! .
5556                       href(action=>"blob_plain", hash=>$hash,
5557                            hash_base=>$hash_base, file_name=>$file_name) .
5558                       qq!" />\n!;
5559         } else {
5560                 my $nr;
5561                 while (my $line = <$fd>) {
5562                         chomp $line;
5563                         $nr++;
5564                         $line = untabify($line);
5565                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5566                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5567                 }
5568         }
5569         close $fd
5570                 or print "Reading blob failed.\n";
5571         print "</div>";
5572         git_footer_html();
5573 }
5574
5575 sub git_tree {
5576         if (!defined $hash_base) {
5577                 $hash_base = "HEAD";
5578         }
5579         if (!defined $hash) {
5580                 if (defined $file_name) {
5581                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5582                 } else {
5583                         $hash = $hash_base;
5584                 }
5585         }
5586         die_error(404, "No such tree") unless defined($hash);
5587
5588         my $show_sizes = gitweb_check_feature('show-sizes');
5589         my $have_blame = gitweb_check_feature('blame');
5590
5591         my @entries = ();
5592         {
5593                 local $/ = "\0";
5594                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5595                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5596                         or die_error(500, "Open git-ls-tree failed");
5597                 @entries = map { chomp; $_ } <$fd>;
5598                 close $fd
5599                         or die_error(404, "Reading tree failed");
5600         }
5601
5602         my $refs = git_get_references();
5603         my $ref = format_ref_marker($refs, $hash_base);
5604         git_header_html();
5605         my $basedir = '';
5606         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5607                 my @views_nav = ();
5608                 if (defined $file_name) {
5609                         push @views_nav,
5610                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5611                                         "history"),
5612                                 $cgi->a({-href => href(action=>"tree",
5613                                                        hash_base=>"HEAD", file_name=>$file_name)},
5614                                         "HEAD"),
5615                 }
5616                 my $snapshot_links = format_snapshot_links($hash);
5617                 if (defined $snapshot_links) {
5618                         # FIXME: Should be available when we have no hash base as well.
5619                         push @views_nav, $snapshot_links;
5620                 }
5621                 git_print_page_nav('tree','', $hash_base, undef, undef,
5622                                    join(' | ', @views_nav));
5623                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5624         } else {
5625                 undef $hash_base;
5626                 print "<div class=\"page_nav\">\n";
5627                 print "<br/><br/></div>\n";
5628                 print "<div class=\"title\">$hash</div>\n";
5629         }
5630         if (defined $file_name) {
5631                 $basedir = $file_name;
5632                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5633                         $basedir .= '/';
5634                 }
5635                 git_print_page_path($file_name, 'tree', $hash_base);
5636         }
5637         print "<div class=\"page_body\">\n";
5638         print "<table class=\"tree\">\n";
5639         my $alternate = 1;
5640         # '..' (top directory) link if possible
5641         if (defined $hash_base &&
5642             defined $file_name && $file_name =~ m![^/]+$!) {
5643                 if ($alternate) {
5644                         print "<tr class=\"dark\">\n";
5645                 } else {
5646                         print "<tr class=\"light\">\n";
5647                 }
5648                 $alternate ^= 1;
5649
5650                 my $up = $file_name;
5651                 $up =~ s!/?[^/]+$!!;
5652                 undef $up unless $up;
5653                 # based on git_print_tree_entry
5654                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5655                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5656                 print '<td class="list">';
5657                 print $cgi->a({-href => href(action=>"tree",
5658                                              hash_base=>$hash_base,
5659                                              file_name=>$up)},
5660                               "..");
5661                 print "</td>\n";
5662                 print "<td class=\"link\"></td>\n";
5663
5664                 print "</tr>\n";
5665         }
5666         foreach my $line (@entries) {
5667                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5668
5669                 if ($alternate) {
5670                         print "<tr class=\"dark\">\n";
5671                 } else {
5672                         print "<tr class=\"light\">\n";
5673                 }
5674                 $alternate ^= 1;
5675
5676                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5677
5678                 print "</tr>\n";
5679         }
5680         print "</table>\n" .
5681               "</div>";
5682         git_footer_html();
5683 }
5684
5685 sub snapshot_name {
5686         my ($project, $hash) = @_;
5687
5688         # path/to/project.git  -> project
5689         # path/to/project/.git -> project
5690         my $name = to_utf8($project);
5691         $name =~ s,([^/])/*\.git$,$1,;
5692         $name = basename($name);
5693         # sanitize name
5694         $name =~ s/[[:cntrl:]]/?/g;
5695
5696         my $ver = $hash;
5697         if ($hash =~ /^[0-9a-fA-F]+$/) {
5698                 # shorten SHA-1 hash
5699                 my $full_hash = git_get_full_hash($project, $hash);
5700                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5701                         $ver = git_get_short_hash($project, $hash);
5702                 }
5703         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5704                 # tags don't need shortened SHA-1 hash
5705                 $ver = $1;
5706         } else {
5707                 # branches and other need shortened SHA-1 hash
5708                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5709                         $ver = $1;
5710                 }
5711                 $ver .= '-' . git_get_short_hash($project, $hash);
5712         }
5713         # in case of hierarchical branch names
5714         $ver =~ s!/!.!g;
5715
5716         # name = project-version_string
5717         $name = "$name-$ver";
5718
5719         return wantarray ? ($name, $name) : $name;
5720 }
5721
5722 sub git_snapshot {
5723         my $format = $input_params{'snapshot_format'};
5724         if (!@snapshot_fmts) {
5725                 die_error(403, "Snapshots not allowed");
5726         }
5727         # default to first supported snapshot format
5728         $format ||= $snapshot_fmts[0];
5729         if ($format !~ m/^[a-z0-9]+$/) {
5730                 die_error(400, "Invalid snapshot format parameter");
5731         } elsif (!exists($known_snapshot_formats{$format})) {
5732                 die_error(400, "Unknown snapshot format");
5733         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5734                 die_error(403, "Snapshot format not allowed");
5735         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5736                 die_error(403, "Unsupported snapshot format");
5737         }
5738
5739         my $type = git_get_type("$hash^{}");
5740         if (!$type) {
5741                 die_error(404, 'Object does not exist');
5742         }  elsif ($type eq 'blob') {
5743                 die_error(400, 'Object is not a tree-ish');
5744         }
5745
5746         my ($name, $prefix) = snapshot_name($project, $hash);
5747         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5748         my $cmd = quote_command(
5749                 git_cmd(), 'archive',
5750                 "--format=$known_snapshot_formats{$format}{'format'}",
5751                 "--prefix=$prefix/", $hash);
5752         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5753                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5754         }
5755
5756         $filename =~ s/(["\\])/\\$1/g;
5757         print $cgi->header(
5758                 -type => $known_snapshot_formats{$format}{'type'},
5759                 -content_disposition => 'inline; filename="' . $filename . '"',
5760                 -status => '200 OK');
5761
5762         open my $fd, "-|", $cmd
5763                 or die_error(500, "Execute git-archive failed");
5764         binmode STDOUT, ':raw';
5765         print <$fd>;
5766         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5767         close $fd;
5768 }
5769
5770 sub git_log_generic {
5771         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5772
5773         my $head = git_get_head_hash($project);
5774         if (!defined $base) {
5775                 $base = $head;
5776         }
5777         if (!defined $page) {
5778                 $page = 0;
5779         }
5780         my $refs = git_get_references();
5781
5782         my $commit_hash = $base;
5783         if (defined $parent) {
5784                 $commit_hash = "$parent..$base";
5785         }
5786         my @commitlist =
5787                 parse_commits($commit_hash, 101, (100 * $page),
5788                               defined $file_name ? ($file_name, "--full-history") : ());
5789
5790         my $ftype;
5791         if (!defined $file_hash && defined $file_name) {
5792                 # some commits could have deleted file in question,
5793                 # and not have it in tree, but one of them has to have it
5794                 for (my $i = 0; $i < @commitlist; $i++) {
5795                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5796                         last if defined $file_hash;
5797                 }
5798         }
5799         if (defined $file_hash) {
5800                 $ftype = git_get_type($file_hash);
5801         }
5802         if (defined $file_name && !defined $ftype) {
5803                 die_error(500, "Unknown type of object");
5804         }
5805         my %co;
5806         if (defined $file_name) {
5807                 %co = parse_commit($base)
5808                         or die_error(404, "Unknown commit object");
5809         }
5810
5811
5812         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5813         my $next_link = '';
5814         if ($#commitlist >= 100) {
5815                 $next_link =
5816                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5817                                  -accesskey => "n", -title => "Alt-n"}, "next");
5818         }
5819         my $patch_max = gitweb_get_feature('patches');
5820         if ($patch_max && !defined $file_name) {
5821                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5822                         $paging_nav .= " &sdot; " .
5823                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5824                                         "patches");
5825                 }
5826         }
5827
5828         git_header_html();
5829         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5830         if (defined $file_name) {
5831                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5832         } else {
5833                 git_print_header_div('summary', $project)
5834         }
5835         git_print_page_path($file_name, $ftype, $hash_base)
5836                 if (defined $file_name);
5837
5838         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5839                      $file_name, $file_hash, $ftype);
5840
5841         git_footer_html();
5842 }
5843
5844 sub git_log {
5845         git_log_generic('log', \&git_log_body,
5846                         $hash, $hash_parent);
5847 }
5848
5849 sub git_commit {
5850         $hash ||= $hash_base || "HEAD";
5851         my %co = parse_commit($hash)
5852             or die_error(404, "Unknown commit object");
5853
5854         my $parent  = $co{'parent'};
5855         my $parents = $co{'parents'}; # listref
5856
5857         # we need to prepare $formats_nav before any parameter munging
5858         my $formats_nav;
5859         if (!defined $parent) {
5860                 # --root commitdiff
5861                 $formats_nav .= '(initial)';
5862         } elsif (@$parents == 1) {
5863                 # single parent commit
5864                 $formats_nav .=
5865                         '(parent: ' .
5866                         $cgi->a({-href => href(action=>"commit",
5867                                                hash=>$parent)},
5868                                 esc_html(substr($parent, 0, 7))) .
5869                         ')';
5870         } else {
5871                 # merge commit
5872                 $formats_nav .=
5873                         '(merge: ' .
5874                         join(' ', map {
5875                                 $cgi->a({-href => href(action=>"commit",
5876                                                        hash=>$_)},
5877                                         esc_html(substr($_, 0, 7)));
5878                         } @$parents ) .
5879                         ')';
5880         }
5881         if (gitweb_check_feature('patches') && @$parents <= 1) {
5882                 $formats_nav .= " | " .
5883                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5884                                 "patch");
5885         }
5886
5887         if (!defined $parent) {
5888                 $parent = "--root";
5889         }
5890         my @difftree;
5891         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5892                 @diff_opts,
5893                 (@$parents <= 1 ? $parent : '-c'),
5894                 $hash, "--"
5895                 or die_error(500, "Open git-diff-tree failed");
5896         @difftree = map { chomp; $_ } <$fd>;
5897         close $fd or die_error(404, "Reading git-diff-tree failed");
5898
5899         # non-textual hash id's can be cached
5900         my $expires;
5901         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5902                 $expires = "+1d";
5903         }
5904         my $refs = git_get_references();
5905         my $ref = format_ref_marker($refs, $co{'id'});
5906
5907         git_header_html(undef, $expires);
5908         git_print_page_nav('commit', '',
5909                            $hash, $co{'tree'}, $hash,
5910                            $formats_nav);
5911
5912         if (defined $co{'parent'}) {
5913                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5914         } else {
5915                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5916         }
5917         print "<div class=\"title_text\">\n" .
5918               "<table class=\"object_header\">\n";
5919         git_print_authorship_rows(\%co);
5920         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5921         print "<tr>" .
5922               "<td>tree</td>" .
5923               "<td class=\"sha1\">" .
5924               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5925                        class => "list"}, $co{'tree'}) .
5926               "</td>" .
5927               "<td class=\"link\">" .
5928               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5929                       "tree");
5930         my $snapshot_links = format_snapshot_links($hash);
5931         if (defined $snapshot_links) {
5932                 print " | " . $snapshot_links;
5933         }
5934         print "</td>" .
5935               "</tr>\n";
5936
5937         foreach my $par (@$parents) {
5938                 print "<tr>" .
5939                       "<td>parent</td>" .
5940                       "<td class=\"sha1\">" .
5941                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5942                                class => "list"}, $par) .
5943                       "</td>" .
5944                       "<td class=\"link\">" .
5945                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5946                       " | " .
5947                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5948                       "</td>" .
5949                       "</tr>\n";
5950         }
5951         print "</table>".
5952               "</div>\n";
5953
5954         print "<div class=\"page_body\">\n";
5955         git_print_log($co{'comment'});
5956         print "</div>\n";
5957
5958         git_difftree_body(\@difftree, $hash, @$parents);
5959
5960         git_footer_html();
5961 }
5962
5963 sub git_object {
5964         # object is defined by:
5965         # - hash or hash_base alone
5966         # - hash_base and file_name
5967         my $type;
5968
5969         # - hash or hash_base alone
5970         if ($hash || ($hash_base && !defined $file_name)) {
5971                 my $object_id = $hash || $hash_base;
5972
5973                 open my $fd, "-|", quote_command(
5974                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5975                         or die_error(404, "Object does not exist");
5976                 $type = <$fd>;
5977                 chomp $type;
5978                 close $fd
5979                         or die_error(404, "Object does not exist");
5980
5981         # - hash_base and file_name
5982         } elsif ($hash_base && defined $file_name) {
5983                 $file_name =~ s,/+$,,;
5984
5985                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5986                         or die_error(404, "Base object does not exist");
5987
5988                 # here errors should not hapen
5989                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5990                         or die_error(500, "Open git-ls-tree failed");
5991                 my $line = <$fd>;
5992                 close $fd;
5993
5994                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5995                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5996                         die_error(404, "File or directory for given base does not exist");
5997                 }
5998                 $type = $2;
5999                 $hash = $3;
6000         } else {
6001                 die_error(400, "Not enough information to find object");
6002         }
6003
6004         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6005                                           hash=>$hash, hash_base=>$hash_base,
6006                                           file_name=>$file_name),
6007                              -status => '302 Found');
6008 }
6009
6010 sub git_blobdiff {
6011         my $format = shift || 'html';
6012
6013         my $fd;
6014         my @difftree;
6015         my %diffinfo;
6016         my $expires;
6017
6018         # preparing $fd and %diffinfo for git_patchset_body
6019         # new style URI
6020         if (defined $hash_base && defined $hash_parent_base) {
6021                 if (defined $file_name) {
6022                         # read raw output
6023                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6024                                 $hash_parent_base, $hash_base,
6025                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6026                                 or die_error(500, "Open git-diff-tree failed");
6027                         @difftree = map { chomp; $_ } <$fd>;
6028                         close $fd
6029                                 or die_error(404, "Reading git-diff-tree failed");
6030                         @difftree
6031                                 or die_error(404, "Blob diff not found");
6032
6033                 } elsif (defined $hash &&
6034                          $hash =~ /[0-9a-fA-F]{40}/) {
6035                         # try to find filename from $hash
6036
6037                         # read filtered raw output
6038                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6039                                 $hash_parent_base, $hash_base, "--"
6040                                 or die_error(500, "Open git-diff-tree failed");
6041                         @difftree =
6042                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6043                                 # $hash == to_id
6044                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6045                                 map { chomp; $_ } <$fd>;
6046                         close $fd
6047                                 or die_error(404, "Reading git-diff-tree failed");
6048                         @difftree
6049                                 or die_error(404, "Blob diff not found");
6050
6051                 } else {
6052                         die_error(400, "Missing one of the blob diff parameters");
6053                 }
6054
6055                 if (@difftree > 1) {
6056                         die_error(400, "Ambiguous blob diff specification");
6057                 }
6058
6059                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6060                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6061                 $file_name   ||= $diffinfo{'to_file'};
6062
6063                 $hash_parent ||= $diffinfo{'from_id'};
6064                 $hash        ||= $diffinfo{'to_id'};
6065
6066                 # non-textual hash id's can be cached
6067                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6068                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6069                         $expires = '+1d';
6070                 }
6071
6072                 # open patch output
6073                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6074                         '-p', ($format eq 'html' ? "--full-index" : ()),
6075                         $hash_parent_base, $hash_base,
6076                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6077                         or die_error(500, "Open git-diff-tree failed");
6078         }
6079
6080         # old/legacy style URI -- not generated anymore since 1.4.3.
6081         if (!%diffinfo) {
6082                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6083         }
6084
6085         # header
6086         if ($format eq 'html') {
6087                 my $formats_nav =
6088                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6089                                 "raw");
6090                 git_header_html(undef, $expires);
6091                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6092                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6093                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6094                 } else {
6095                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6096                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6097                 }
6098                 if (defined $file_name) {
6099                         git_print_page_path($file_name, "blob", $hash_base);
6100                 } else {
6101                         print "<div class=\"page_path\"></div>\n";
6102                 }
6103
6104         } elsif ($format eq 'plain') {
6105                 print $cgi->header(
6106                         -type => 'text/plain',
6107                         -charset => 'utf-8',
6108                         -expires => $expires,
6109                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6110
6111                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6112
6113         } else {
6114                 die_error(400, "Unknown blobdiff format");
6115         }
6116
6117         # patch
6118         if ($format eq 'html') {
6119                 print "<div class=\"page_body\">\n";
6120
6121                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6122                 close $fd;
6123
6124                 print "</div>\n"; # class="page_body"
6125                 git_footer_html();
6126
6127         } else {
6128                 while (my $line = <$fd>) {
6129                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6130                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6131
6132                         print $line;
6133
6134                         last if $line =~ m!^\+\+\+!;
6135                 }
6136                 local $/ = undef;
6137                 print <$fd>;
6138                 close $fd;
6139         }
6140 }
6141
6142 sub git_blobdiff_plain {
6143         git_blobdiff('plain');
6144 }
6145
6146 sub git_commitdiff {
6147         my %params = @_;
6148         my $format = $params{-format} || 'html';
6149
6150         my ($patch_max) = gitweb_get_feature('patches');
6151         if ($format eq 'patch') {
6152                 die_error(403, "Patch view not allowed") unless $patch_max;
6153         }
6154
6155         $hash ||= $hash_base || "HEAD";
6156         my %co = parse_commit($hash)
6157             or die_error(404, "Unknown commit object");
6158
6159         # choose format for commitdiff for merge
6160         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6161                 $hash_parent = '--cc';
6162         }
6163         # we need to prepare $formats_nav before almost any parameter munging
6164         my $formats_nav;
6165         if ($format eq 'html') {
6166                 $formats_nav =
6167                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6168                                 "raw");
6169                 if ($patch_max && @{$co{'parents'}} <= 1) {
6170                         $formats_nav .= " | " .
6171                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6172                                         "patch");
6173                 }
6174
6175                 if (defined $hash_parent &&
6176                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6177                         # commitdiff with two commits given
6178                         my $hash_parent_short = $hash_parent;
6179                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6180                                 $hash_parent_short = substr($hash_parent, 0, 7);
6181                         }
6182                         $formats_nav .=
6183                                 ' (from';
6184                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6185                                 if ($co{'parents'}[$i] eq $hash_parent) {
6186                                         $formats_nav .= ' parent ' . ($i+1);
6187                                         last;
6188                                 }
6189                         }
6190                         $formats_nav .= ': ' .
6191                                 $cgi->a({-href => href(action=>"commitdiff",
6192                                                        hash=>$hash_parent)},
6193                                         esc_html($hash_parent_short)) .
6194                                 ')';
6195                 } elsif (!$co{'parent'}) {
6196                         # --root commitdiff
6197                         $formats_nav .= ' (initial)';
6198                 } elsif (scalar @{$co{'parents'}} == 1) {
6199                         # single parent commit
6200                         $formats_nav .=
6201                                 ' (parent: ' .
6202                                 $cgi->a({-href => href(action=>"commitdiff",
6203                                                        hash=>$co{'parent'})},
6204                                         esc_html(substr($co{'parent'}, 0, 7))) .
6205                                 ')';
6206                 } else {
6207                         # merge commit
6208                         if ($hash_parent eq '--cc') {
6209                                 $formats_nav .= ' | ' .
6210                                         $cgi->a({-href => href(action=>"commitdiff",
6211                                                                hash=>$hash, hash_parent=>'-c')},
6212                                                 'combined');
6213                         } else { # $hash_parent eq '-c'
6214                                 $formats_nav .= ' | ' .
6215                                         $cgi->a({-href => href(action=>"commitdiff",
6216                                                                hash=>$hash, hash_parent=>'--cc')},
6217                                                 'compact');
6218                         }
6219                         $formats_nav .=
6220                                 ' (merge: ' .
6221                                 join(' ', map {
6222                                         $cgi->a({-href => href(action=>"commitdiff",
6223                                                                hash=>$_)},
6224                                                 esc_html(substr($_, 0, 7)));
6225                                 } @{$co{'parents'}} ) .
6226                                 ')';
6227                 }
6228         }
6229
6230         my $hash_parent_param = $hash_parent;
6231         if (!defined $hash_parent_param) {
6232                 # --cc for multiple parents, --root for parentless
6233                 $hash_parent_param =
6234                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6235         }
6236
6237         # read commitdiff
6238         my $fd;
6239         my @difftree;
6240         if ($format eq 'html') {
6241                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6242                         "--no-commit-id", "--patch-with-raw", "--full-index",
6243                         $hash_parent_param, $hash, "--"
6244                         or die_error(500, "Open git-diff-tree failed");
6245
6246                 while (my $line = <$fd>) {
6247                         chomp $line;
6248                         # empty line ends raw part of diff-tree output
6249                         last unless $line;
6250                         push @difftree, scalar parse_difftree_raw_line($line);
6251                 }
6252
6253         } elsif ($format eq 'plain') {
6254                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6255                         '-p', $hash_parent_param, $hash, "--"
6256                         or die_error(500, "Open git-diff-tree failed");
6257         } elsif ($format eq 'patch') {
6258                 # For commit ranges, we limit the output to the number of
6259                 # patches specified in the 'patches' feature.
6260                 # For single commits, we limit the output to a single patch,
6261                 # diverging from the git-format-patch default.
6262                 my @commit_spec = ();
6263                 if ($hash_parent) {
6264                         if ($patch_max > 0) {
6265                                 push @commit_spec, "-$patch_max";
6266                         }
6267                         push @commit_spec, '-n', "$hash_parent..$hash";
6268                 } else {
6269                         if ($params{-single}) {
6270                                 push @commit_spec, '-1';
6271                         } else {
6272                                 if ($patch_max > 0) {
6273                                         push @commit_spec, "-$patch_max";
6274                                 }
6275                                 push @commit_spec, "-n";
6276                         }
6277                         push @commit_spec, '--root', $hash;
6278                 }
6279                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6280                         '--stdout', @commit_spec
6281                         or die_error(500, "Open git-format-patch failed");
6282         } else {
6283                 die_error(400, "Unknown commitdiff format");
6284         }
6285
6286         # non-textual hash id's can be cached
6287         my $expires;
6288         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6289                 $expires = "+1d";
6290         }
6291
6292         # write commit message
6293         if ($format eq 'html') {
6294                 my $refs = git_get_references();
6295                 my $ref = format_ref_marker($refs, $co{'id'});
6296
6297                 git_header_html(undef, $expires);
6298                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6299                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6300                 print "<div class=\"title_text\">\n" .
6301                       "<table class=\"object_header\">\n";
6302                 git_print_authorship_rows(\%co);
6303                 print "</table>".
6304                       "</div>\n";
6305                 print "<div class=\"page_body\">\n";
6306                 if (@{$co{'comment'}} > 1) {
6307                         print "<div class=\"log\">\n";
6308                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6309                         print "</div>\n"; # class="log"
6310                 }
6311
6312         } elsif ($format eq 'plain') {
6313                 my $refs = git_get_references("tags");
6314                 my $tagname = git_get_rev_name_tags($hash);
6315                 my $filename = basename($project) . "-$hash.patch";
6316
6317                 print $cgi->header(
6318                         -type => 'text/plain',
6319                         -charset => 'utf-8',
6320                         -expires => $expires,
6321                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6322                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6323                 print "From: " . to_utf8($co{'author'}) . "\n";
6324                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6325                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6326
6327                 print "X-Git-Tag: $tagname\n" if $tagname;
6328                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6329
6330                 foreach my $line (@{$co{'comment'}}) {
6331                         print to_utf8($line) . "\n";
6332                 }
6333                 print "---\n\n";
6334         } elsif ($format eq 'patch') {
6335                 my $filename = basename($project) . "-$hash.patch";
6336
6337                 print $cgi->header(
6338                         -type => 'text/plain',
6339                         -charset => 'utf-8',
6340                         -expires => $expires,
6341                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6342         }
6343
6344         # write patch
6345         if ($format eq 'html') {
6346                 my $use_parents = !defined $hash_parent ||
6347                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6348                 git_difftree_body(\@difftree, $hash,
6349                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6350                 print "<br/>\n";
6351
6352                 git_patchset_body($fd, \@difftree, $hash,
6353                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6354                 close $fd;
6355                 print "</div>\n"; # class="page_body"
6356                 git_footer_html();
6357
6358         } elsif ($format eq 'plain') {
6359                 local $/ = undef;
6360                 print <$fd>;
6361                 close $fd
6362                         or print "Reading git-diff-tree failed\n";
6363         } elsif ($format eq 'patch') {
6364                 local $/ = undef;
6365                 print <$fd>;
6366                 close $fd
6367                         or print "Reading git-format-patch failed\n";
6368         }
6369 }
6370
6371 sub git_commitdiff_plain {
6372         git_commitdiff(-format => 'plain');
6373 }
6374
6375 # format-patch-style patches
6376 sub git_patch {
6377         git_commitdiff(-format => 'patch', -single => 1);
6378 }
6379
6380 sub git_patches {
6381         git_commitdiff(-format => 'patch');
6382 }
6383
6384 sub git_history {
6385         git_log_generic('history', \&git_history_body,
6386                         $hash_base, $hash_parent_base,
6387                         $file_name, $hash);
6388 }
6389
6390 sub git_search {
6391         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6392         if (!defined $searchtext) {
6393                 die_error(400, "Text field is empty");
6394         }
6395         if (!defined $hash) {
6396                 $hash = git_get_head_hash($project);
6397         }
6398         my %co = parse_commit($hash);
6399         if (!%co) {
6400                 die_error(404, "Unknown commit object");
6401         }
6402         if (!defined $page) {
6403                 $page = 0;
6404         }
6405
6406         $searchtype ||= 'commit';
6407         if ($searchtype eq 'pickaxe') {
6408                 # pickaxe may take all resources of your box and run for several minutes
6409                 # with every query - so decide by yourself how public you make this feature
6410                 gitweb_check_feature('pickaxe')
6411                     or die_error(403, "Pickaxe is disabled");
6412         }
6413         if ($searchtype eq 'grep') {
6414                 gitweb_check_feature('grep')[0]
6415                     or die_error(403, "Grep is disabled");
6416         }
6417
6418         git_header_html();
6419
6420         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6421                 my $greptype;
6422                 if ($searchtype eq 'commit') {
6423                         $greptype = "--grep=";
6424                 } elsif ($searchtype eq 'author') {
6425                         $greptype = "--author=";
6426                 } elsif ($searchtype eq 'committer') {
6427                         $greptype = "--committer=";
6428                 }
6429                 $greptype .= $searchtext;
6430                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6431                                                $greptype, '--regexp-ignore-case',
6432                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6433
6434                 my $paging_nav = '';
6435                 if ($page > 0) {
6436                         $paging_nav .=
6437                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6438                                                        searchtext=>$searchtext,
6439                                                        searchtype=>$searchtype)},
6440                                         "first");
6441                         $paging_nav .= " &sdot; " .
6442                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6443                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6444                 } else {
6445                         $paging_nav .= "first";
6446                         $paging_nav .= " &sdot; prev";
6447                 }
6448                 my $next_link = '';
6449                 if ($#commitlist >= 100) {
6450                         $next_link =
6451                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6452                                          -accesskey => "n", -title => "Alt-n"}, "next");
6453                         $paging_nav .= " &sdot; $next_link";
6454                 } else {
6455                         $paging_nav .= " &sdot; next";
6456                 }
6457
6458                 if ($#commitlist >= 100) {
6459                 }
6460
6461                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6462                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6463                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6464         }
6465
6466         if ($searchtype eq 'pickaxe') {
6467                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6468                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6469
6470                 print "<table class=\"pickaxe search\">\n";
6471                 my $alternate = 1;
6472                 local $/ = "\n";
6473                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6474                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6475                         ($search_use_regexp ? '--pickaxe-regex' : ());
6476                 undef %co;
6477                 my @files;
6478                 while (my $line = <$fd>) {
6479                         chomp $line;
6480                         next unless $line;
6481
6482                         my %set = parse_difftree_raw_line($line);
6483                         if (defined $set{'commit'}) {
6484                                 # finish previous commit
6485                                 if (%co) {
6486                                         print "</td>\n" .
6487                                               "<td class=\"link\">" .
6488                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6489                                               " | " .
6490                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6491                                         print "</td>\n" .
6492                                               "</tr>\n";
6493                                 }
6494
6495                                 if ($alternate) {
6496                                         print "<tr class=\"dark\">\n";
6497                                 } else {
6498                                         print "<tr class=\"light\">\n";
6499                                 }
6500                                 $alternate ^= 1;
6501                                 %co = parse_commit($set{'commit'});
6502                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6503                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6504                                       "<td><i>$author</i></td>\n" .
6505                                       "<td>" .
6506                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6507                                               -class => "list subject"},
6508                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6509                         } elsif (defined $set{'to_id'}) {
6510                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6511
6512                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6513                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6514                                               -class => "list"},
6515                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6516                                       "<br/>\n";
6517                         }
6518                 }
6519                 close $fd;
6520
6521                 # finish last commit (warning: repetition!)
6522                 if (%co) {
6523                         print "</td>\n" .
6524                               "<td class=\"link\">" .
6525                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6526                               " | " .
6527                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6528                         print "</td>\n" .
6529                               "</tr>\n";
6530                 }
6531
6532                 print "</table>\n";
6533         }
6534
6535         if ($searchtype eq 'grep') {
6536                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6537                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6538
6539                 print "<table class=\"grep_search\">\n";
6540                 my $alternate = 1;
6541                 my $matches = 0;
6542                 local $/ = "\n";
6543                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6544                         $search_use_regexp ? ('-E', '-i') : '-F',
6545                         $searchtext, $co{'tree'};
6546                 my $lastfile = '';
6547                 while (my $line = <$fd>) {
6548                         chomp $line;
6549                         my ($file, $lno, $ltext, $binary);
6550                         last if ($matches++ > 1000);
6551                         if ($line =~ /^Binary file (.+) matches$/) {
6552                                 $file = $1;
6553                                 $binary = 1;
6554                         } else {
6555                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6556                         }
6557                         if ($file ne $lastfile) {
6558                                 $lastfile and print "</td></tr>\n";
6559                                 if ($alternate++) {
6560                                         print "<tr class=\"dark\">\n";
6561                                 } else {
6562                                         print "<tr class=\"light\">\n";
6563                                 }
6564                                 print "<td class=\"list\">".
6565                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6566                                                                file_name=>"$file"),
6567                                                 -class => "list"}, esc_path($file));
6568                                 print "</td><td>\n";
6569                                 $lastfile = $file;
6570                         }
6571                         if ($binary) {
6572                                 print "<div class=\"binary\">Binary file</div>\n";
6573                         } else {
6574                                 $ltext = untabify($ltext);
6575                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6576                                         $ltext = esc_html($1, -nbsp=>1);
6577                                         $ltext .= '<span class="match">';
6578                                         $ltext .= esc_html($2, -nbsp=>1);
6579                                         $ltext .= '</span>';
6580                                         $ltext .= esc_html($3, -nbsp=>1);
6581                                 } else {
6582                                         $ltext = esc_html($ltext, -nbsp=>1);
6583                                 }
6584                                 print "<div class=\"pre\">" .
6585                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6586                                                                file_name=>"$file").'#l'.$lno,
6587                                                 -class => "linenr"}, sprintf('%4i', $lno))
6588                                         . ' ' .  $ltext . "</div>\n";
6589                         }
6590                 }
6591                 if ($lastfile) {
6592                         print "</td></tr>\n";
6593                         if ($matches > 1000) {
6594                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6595                         }
6596                 } else {
6597                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6598                 }
6599                 close $fd;
6600
6601                 print "</table>\n";
6602         }
6603         git_footer_html();
6604 }
6605
6606 sub git_search_help {
6607         git_header_html();
6608         git_print_page_nav('','', $hash,$hash,$hash);
6609         print <<EOT;
6610 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6611 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6612 the pattern entered is recognized as the POSIX extended
6613 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6614 insensitive).</p>
6615 <dl>
6616 <dt><b>commit</b></dt>
6617 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6618 EOT
6619         my $have_grep = gitweb_check_feature('grep');
6620         if ($have_grep) {
6621                 print <<EOT;
6622 <dt><b>grep</b></dt>
6623 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6624     a different one) are searched for the given pattern. On large trees, this search can take
6625 a while and put some strain on the server, so please use it with some consideration. Note that
6626 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6627 case-sensitive.</dd>
6628 EOT
6629         }
6630         print <<EOT;
6631 <dt><b>author</b></dt>
6632 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6633 <dt><b>committer</b></dt>
6634 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6635 EOT
6636         my $have_pickaxe = gitweb_check_feature('pickaxe');
6637         if ($have_pickaxe) {
6638                 print <<EOT;
6639 <dt><b>pickaxe</b></dt>
6640 <dd>All commits that caused the string to appear or disappear from any file (changes that
6641 added, removed or "modified" the string) will be listed. This search can take a while and
6642 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6643 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6644 EOT
6645         }
6646         print "</dl>\n";
6647         git_footer_html();
6648 }
6649
6650 sub git_shortlog {
6651         git_log_generic('shortlog', \&git_shortlog_body,
6652                         $hash, $hash_parent);
6653 }
6654
6655 ## ......................................................................
6656 ## feeds (RSS, Atom; OPML)
6657
6658 sub git_feed {
6659         my $format = shift || 'atom';
6660         my $have_blame = gitweb_check_feature('blame');
6661
6662         # Atom: http://www.atomenabled.org/developers/syndication/
6663         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6664         if ($format ne 'rss' && $format ne 'atom') {
6665                 die_error(400, "Unknown web feed format");
6666         }
6667
6668         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6669         my $head = $hash || 'HEAD';
6670         my @commitlist = parse_commits($head, 150, 0, $file_name);
6671
6672         my %latest_commit;
6673         my %latest_date;
6674         my $content_type = "application/$format+xml";
6675         if (defined $cgi->http('HTTP_ACCEPT') &&
6676                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6677                 # browser (feed reader) prefers text/xml
6678                 $content_type = 'text/xml';
6679         }
6680         if (defined($commitlist[0])) {
6681                 %latest_commit = %{$commitlist[0]};
6682                 my $latest_epoch = $latest_commit{'committer_epoch'};
6683                 %latest_date   = parse_date($latest_epoch);
6684                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6685                 if (defined $if_modified) {
6686                         my $since;
6687                         if (eval { require HTTP::Date; 1; }) {
6688                                 $since = HTTP::Date::str2time($if_modified);
6689                         } elsif (eval { require Time::ParseDate; 1; }) {
6690                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6691                         }
6692                         if (defined $since && $latest_epoch <= $since) {
6693                                 print $cgi->header(
6694                                         -type => $content_type,
6695                                         -charset => 'utf-8',
6696                                         -last_modified => $latest_date{'rfc2822'},
6697                                         -status => '304 Not Modified');
6698                                 return;
6699                         }
6700                 }
6701                 print $cgi->header(
6702                         -type => $content_type,
6703                         -charset => 'utf-8',
6704                         -last_modified => $latest_date{'rfc2822'});
6705         } else {
6706                 print $cgi->header(
6707                         -type => $content_type,
6708                         -charset => 'utf-8');
6709         }
6710
6711         # Optimization: skip generating the body if client asks only
6712         # for Last-Modified date.
6713         return if ($cgi->request_method() eq 'HEAD');
6714
6715         # header variables
6716         my $title = "$site_name - $project/$action";
6717         my $feed_type = 'log';
6718         if (defined $hash) {
6719                 $title .= " - '$hash'";
6720                 $feed_type = 'branch log';
6721                 if (defined $file_name) {
6722                         $title .= " :: $file_name";
6723                         $feed_type = 'history';
6724                 }
6725         } elsif (defined $file_name) {
6726                 $title .= " - $file_name";
6727                 $feed_type = 'history';
6728         }
6729         $title .= " $feed_type";
6730         my $descr = git_get_project_description($project);
6731         if (defined $descr) {
6732                 $descr = esc_html($descr);
6733         } else {
6734                 $descr = "$project " .
6735                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6736                          " feed";
6737         }
6738         my $owner = git_get_project_owner($project);
6739         $owner = esc_html($owner);
6740
6741         #header
6742         my $alt_url;
6743         if (defined $file_name) {
6744                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6745         } elsif (defined $hash) {
6746                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6747         } else {
6748                 $alt_url = href(-full=>1, action=>"summary");
6749         }
6750         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6751         if ($format eq 'rss') {
6752                 print <<XML;
6753 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6754 <channel>
6755 XML
6756                 print "<title>$title</title>\n" .
6757                       "<link>$alt_url</link>\n" .
6758                       "<description>$descr</description>\n" .
6759                       "<language>en</language>\n" .
6760                       # project owner is responsible for 'editorial' content
6761                       "<managingEditor>$owner</managingEditor>\n";
6762                 if (defined $logo || defined $favicon) {
6763                         # prefer the logo to the favicon, since RSS
6764                         # doesn't allow both
6765                         my $img = esc_url($logo || $favicon);
6766                         print "<image>\n" .
6767                               "<url>$img</url>\n" .
6768                               "<title>$title</title>\n" .
6769                               "<link>$alt_url</link>\n" .
6770                               "</image>\n";
6771                 }
6772                 if (%latest_date) {
6773                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6774                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6775                 }
6776                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6777         } elsif ($format eq 'atom') {
6778                 print <<XML;
6779 <feed xmlns="http://www.w3.org/2005/Atom">
6780 XML
6781                 print "<title>$title</title>\n" .
6782                       "<subtitle>$descr</subtitle>\n" .
6783                       '<link rel="alternate" type="text/html" href="' .
6784                       $alt_url . '" />' . "\n" .
6785                       '<link rel="self" type="' . $content_type . '" href="' .
6786                       $cgi->self_url() . '" />' . "\n" .
6787                       "<id>" . href(-full=>1) . "</id>\n" .
6788                       # use project owner for feed author
6789                       "<author><name>$owner</name></author>\n";
6790                 if (defined $favicon) {
6791                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6792                 }
6793                 if (defined $logo_url) {
6794                         # not twice as wide as tall: 72 x 27 pixels
6795                         print "<logo>" . esc_url($logo) . "</logo>\n";
6796                 }
6797                 if (! %latest_date) {
6798                         # dummy date to keep the feed valid until commits trickle in:
6799                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6800                 } else {
6801                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6802                 }
6803                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6804         }
6805
6806         # contents
6807         for (my $i = 0; $i <= $#commitlist; $i++) {
6808                 my %co = %{$commitlist[$i]};
6809                 my $commit = $co{'id'};
6810                 # we read 150, we always show 30 and the ones more recent than 48 hours
6811                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6812                         last;
6813                 }
6814                 my %cd = parse_date($co{'author_epoch'});
6815
6816                 # get list of changed files
6817                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6818                         $co{'parent'} || "--root",
6819                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6820                         or next;
6821                 my @difftree = map { chomp; $_ } <$fd>;
6822                 close $fd
6823                         or next;
6824
6825                 # print element (entry, item)
6826                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6827                 if ($format eq 'rss') {
6828                         print "<item>\n" .
6829                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6830                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6831                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6832                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6833                               "<link>$co_url</link>\n" .
6834                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6835                               "<content:encoded>" .
6836                               "<![CDATA[\n";
6837                 } elsif ($format eq 'atom') {
6838                         print "<entry>\n" .
6839                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6840                               "<updated>$cd{'iso-8601'}</updated>\n" .
6841                               "<author>\n" .
6842                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6843                         if ($co{'author_email'}) {
6844                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6845                         }
6846                         print "</author>\n" .
6847                               # use committer for contributor
6848                               "<contributor>\n" .
6849                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6850                         if ($co{'committer_email'}) {
6851                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6852                         }
6853                         print "</contributor>\n" .
6854                               "<published>$cd{'iso-8601'}</published>\n" .
6855                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6856                               "<id>$co_url</id>\n" .
6857                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6858                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6859                 }
6860                 my $comment = $co{'comment'};
6861                 print "<pre>\n";
6862                 foreach my $line (@$comment) {
6863                         $line = esc_html($line);
6864                         print "$line\n";
6865                 }
6866                 print "</pre><ul>\n";
6867                 foreach my $difftree_line (@difftree) {
6868                         my %difftree = parse_difftree_raw_line($difftree_line);
6869                         next if !$difftree{'from_id'};
6870
6871                         my $file = $difftree{'file'} || $difftree{'to_file'};
6872
6873                         print "<li>" .
6874                               "[" .
6875                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6876                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6877                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6878                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6879                                       -title => "diff"}, 'D');
6880                         if ($have_blame) {
6881                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6882                                                              file_name=>$file, hash_base=>$commit),
6883                                               -title => "blame"}, 'B');
6884                         }
6885                         # if this is not a feed of a file history
6886                         if (!defined $file_name || $file_name ne $file) {
6887                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6888                                                              file_name=>$file, hash=>$commit),
6889                                               -title => "history"}, 'H');
6890                         }
6891                         $file = esc_path($file);
6892                         print "] ".
6893                               "$file</li>\n";
6894                 }
6895                 if ($format eq 'rss') {
6896                         print "</ul>]]>\n" .
6897                               "</content:encoded>\n" .
6898                               "</item>\n";
6899                 } elsif ($format eq 'atom') {
6900                         print "</ul>\n</div>\n" .
6901                               "</content>\n" .
6902                               "</entry>\n";
6903                 }
6904         }
6905
6906         # end of feed
6907         if ($format eq 'rss') {
6908                 print "</channel>\n</rss>\n";
6909         } elsif ($format eq 'atom') {
6910                 print "</feed>\n";
6911         }
6912 }
6913
6914 sub git_rss {
6915         git_feed('rss');
6916 }
6917
6918 sub git_atom {
6919         git_feed('atom');
6920 }
6921
6922 sub git_opml {
6923         my @list = git_get_projects_list();
6924
6925         print $cgi->header(
6926                 -type => 'text/xml',
6927                 -charset => 'utf-8',
6928                 -content_disposition => 'inline; filename="opml.xml"');
6929
6930         print <<XML;
6931 <?xml version="1.0" encoding="utf-8"?>
6932 <opml version="1.0">
6933 <head>
6934   <title>$site_name OPML Export</title>
6935 </head>
6936 <body>
6937 <outline text="git RSS feeds">
6938 XML
6939
6940         foreach my $pr (@list) {
6941                 my %proj = %$pr;
6942                 my $head = git_get_head_hash($proj{'path'});
6943                 if (!defined $head) {
6944                         next;
6945                 }
6946                 $git_dir = "$projectroot/$proj{'path'}";
6947                 my %co = parse_commit($head);
6948                 if (!%co) {
6949                         next;
6950                 }
6951
6952                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6953                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6954                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6955                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6956         }
6957         print <<XML;
6958 </outline>
6959 </body>
6960 </opml>
6961 XML
6962 }