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_request {
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
1053 our $is_last_request = sub { 1 };
1054 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1055 our $CGI = 'CGI';
1056 our $cgi;
1057 sub configure_as_fcgi {
1058         require CGI::Fast;
1059         our $CGI = 'CGI::Fast';
1060
1061         my $request_number = 0;
1062         # let each child service 100 requests
1063         our $is_last_request = sub { ++$request_number > 100 };
1064 }
1065 sub evaluate_argv {
1066         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1067         configure_as_fcgi()
1068                 if $script_name =~ /\.fcgi$/;
1069
1070         return unless (@ARGV);
1071
1072         require Getopt::Long;
1073         Getopt::Long::GetOptions(
1074                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1075                 'nproc|n=i' => sub {
1076                         my ($arg, $val) = @_;
1077                         return unless eval { require FCGI::ProcManager; 1; };
1078                         my $proc_manager = FCGI::ProcManager->new({
1079                                 n_processes => $val,
1080                         });
1081                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1082                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1083                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1084                 },
1085         );
1086 }
1087
1088 sub run {
1089         evaluate_argv();
1090
1091         $pre_listen_hook->()
1092                 if $pre_listen_hook;
1093
1094  REQUEST:
1095         while ($cgi = $CGI->new()) {
1096                 $pre_dispatch_hook->()
1097                         if $pre_dispatch_hook;
1098
1099                 run_request();
1100
1101                 $pre_dispatch_hook->()
1102                         if $post_dispatch_hook;
1103
1104                 last REQUEST if ($is_last_request->());
1105         }
1106
1107  DONE_GITWEB:
1108         1;
1109 }
1110
1111 run();
1112
1113 if (defined caller) {
1114         # wrapped in a subroutine processing requests,
1115         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1116         return;
1117 } else {
1118         # pure CGI script, serving single request
1119         exit;
1120 }
1121
1122 ## ======================================================================
1123 ## action links
1124
1125 # possible values of extra options
1126 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1127 # -replay => 1      - start from a current view (replay with modifications)
1128 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1129 sub href {
1130         my %params = @_;
1131         # default is to use -absolute url() i.e. $my_uri
1132         my $href = $params{-full} ? $my_url : $my_uri;
1133
1134         $params{'project'} = $project unless exists $params{'project'};
1135
1136         if ($params{-replay}) {
1137                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1138                         if (!exists $params{$name}) {
1139                                 $params{$name} = $input_params{$name};
1140                         }
1141                 }
1142         }
1143
1144         my $use_pathinfo = gitweb_check_feature('pathinfo');
1145         if (defined $params{'project'} &&
1146             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1147                 # try to put as many parameters as possible in PATH_INFO:
1148                 #   - project name
1149                 #   - action
1150                 #   - hash_parent or hash_parent_base:/file_parent
1151                 #   - hash or hash_base:/filename
1152                 #   - the snapshot_format as an appropriate suffix
1153
1154                 # When the script is the root DirectoryIndex for the domain,
1155                 # $href here would be something like http://gitweb.example.com/
1156                 # Thus, we strip any trailing / from $href, to spare us double
1157                 # slashes in the final URL
1158                 $href =~ s,/$,,;
1159
1160                 # Then add the project name, if present
1161                 $href .= "/".esc_url($params{'project'});
1162                 delete $params{'project'};
1163
1164                 # since we destructively absorb parameters, we keep this
1165                 # boolean that remembers if we're handling a snapshot
1166                 my $is_snapshot = $params{'action'} eq 'snapshot';
1167
1168                 # Summary just uses the project path URL, any other action is
1169                 # added to the URL
1170                 if (defined $params{'action'}) {
1171                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1172                         delete $params{'action'};
1173                 }
1174
1175                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1176                 # stripping nonexistent or useless pieces
1177                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1178                         || $params{'hash_parent'} || $params{'hash'});
1179                 if (defined $params{'hash_base'}) {
1180                         if (defined $params{'hash_parent_base'}) {
1181                                 $href .= esc_url($params{'hash_parent_base'});
1182                                 # skip the file_parent if it's the same as the file_name
1183                                 if (defined $params{'file_parent'}) {
1184                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1185                                                 delete $params{'file_parent'};
1186                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1187                                                 $href .= ":/".esc_url($params{'file_parent'});
1188                                                 delete $params{'file_parent'};
1189                                         }
1190                                 }
1191                                 $href .= "..";
1192                                 delete $params{'hash_parent'};
1193                                 delete $params{'hash_parent_base'};
1194                         } elsif (defined $params{'hash_parent'}) {
1195                                 $href .= esc_url($params{'hash_parent'}). "..";
1196                                 delete $params{'hash_parent'};
1197                         }
1198
1199                         $href .= esc_url($params{'hash_base'});
1200                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1201                                 $href .= ":/".esc_url($params{'file_name'});
1202                                 delete $params{'file_name'};
1203                         }
1204                         delete $params{'hash'};
1205                         delete $params{'hash_base'};
1206                 } elsif (defined $params{'hash'}) {
1207                         $href .= esc_url($params{'hash'});
1208                         delete $params{'hash'};
1209                 }
1210
1211                 # If the action was a snapshot, we can absorb the
1212                 # snapshot_format parameter too
1213                 if ($is_snapshot) {
1214                         my $fmt = $params{'snapshot_format'};
1215                         # snapshot_format should always be defined when href()
1216                         # is called, but just in case some code forgets, we
1217                         # fall back to the default
1218                         $fmt ||= $snapshot_fmts[0];
1219                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1220                         delete $params{'snapshot_format'};
1221                 }
1222         }
1223
1224         # now encode the parameters explicitly
1225         my @result = ();
1226         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1227                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1228                 if (defined $params{$name}) {
1229                         if (ref($params{$name}) eq "ARRAY") {
1230                                 foreach my $par (@{$params{$name}}) {
1231                                         push @result, $symbol . "=" . esc_param($par);
1232                                 }
1233                         } else {
1234                                 push @result, $symbol . "=" . esc_param($params{$name});
1235                         }
1236                 }
1237         }
1238         $href .= "?" . join(';', @result) if scalar @result;
1239
1240         return $href;
1241 }
1242
1243
1244 ## ======================================================================
1245 ## validation, quoting/unquoting and escaping
1246
1247 sub validate_action {
1248         my $input = shift || return undef;
1249         return undef unless exists $actions{$input};
1250         return $input;
1251 }
1252
1253 sub validate_project {
1254         my $input = shift || return undef;
1255         if (!validate_pathname($input) ||
1256                 !(-d "$projectroot/$input") ||
1257                 !check_export_ok("$projectroot/$input") ||
1258                 ($strict_export && !project_in_list($input))) {
1259                 return undef;
1260         } else {
1261                 return $input;
1262         }
1263 }
1264
1265 sub validate_pathname {
1266         my $input = shift || return undef;
1267
1268         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1269         # at the beginning, at the end, and between slashes.
1270         # also this catches doubled slashes
1271         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1272                 return undef;
1273         }
1274         # no null characters
1275         if ($input =~ m!\0!) {
1276                 return undef;
1277         }
1278         return $input;
1279 }
1280
1281 sub validate_refname {
1282         my $input = shift || return undef;
1283
1284         # textual hashes are O.K.
1285         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1286                 return $input;
1287         }
1288         # it must be correct pathname
1289         $input = validate_pathname($input)
1290                 or return undef;
1291         # restrictions on ref name according to git-check-ref-format
1292         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1293                 return undef;
1294         }
1295         return $input;
1296 }
1297
1298 # decode sequences of octets in utf8 into Perl's internal form,
1299 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1300 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1301 sub to_utf8 {
1302         my $str = shift;
1303         return undef unless defined $str;
1304         if (utf8::valid($str)) {
1305                 utf8::decode($str);
1306                 return $str;
1307         } else {
1308                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1309         }
1310 }
1311
1312 # quote unsafe chars, but keep the slash, even when it's not
1313 # correct, but quoted slashes look too horrible in bookmarks
1314 sub esc_param {
1315         my $str = shift;
1316         return undef unless defined $str;
1317         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1318         $str =~ s/ /\+/g;
1319         return $str;
1320 }
1321
1322 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1323 sub esc_url {
1324         my $str = shift;
1325         return undef unless defined $str;
1326         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1327         $str =~ s/\+/%2B/g;
1328         $str =~ s/ /\+/g;
1329         return $str;
1330 }
1331
1332 # replace invalid utf8 character with SUBSTITUTION sequence
1333 sub esc_html {
1334         my $str = shift;
1335         my %opts = @_;
1336
1337         return undef unless defined $str;
1338
1339         $str = to_utf8($str);
1340         $str = $cgi->escapeHTML($str);
1341         if ($opts{'-nbsp'}) {
1342                 $str =~ s/ /&nbsp;/g;
1343         }
1344         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1345         return $str;
1346 }
1347
1348 # quote control characters and escape filename to HTML
1349 sub esc_path {
1350         my $str = shift;
1351         my %opts = @_;
1352
1353         return undef unless defined $str;
1354
1355         $str = to_utf8($str);
1356         $str = $cgi->escapeHTML($str);
1357         if ($opts{'-nbsp'}) {
1358                 $str =~ s/ /&nbsp;/g;
1359         }
1360         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1361         return $str;
1362 }
1363
1364 # Make control characters "printable", using character escape codes (CEC)
1365 sub quot_cec {
1366         my $cntrl = shift;
1367         my %opts = @_;
1368         my %es = ( # character escape codes, aka escape sequences
1369                 "\t" => '\t',   # tab            (HT)
1370                 "\n" => '\n',   # line feed      (LF)
1371                 "\r" => '\r',   # carrige return (CR)
1372                 "\f" => '\f',   # form feed      (FF)
1373                 "\b" => '\b',   # backspace      (BS)
1374                 "\a" => '\a',   # alarm (bell)   (BEL)
1375                 "\e" => '\e',   # escape         (ESC)
1376                 "\013" => '\v', # vertical tab   (VT)
1377                 "\000" => '\0', # nul character  (NUL)
1378         );
1379         my $chr = ( (exists $es{$cntrl})
1380                     ? $es{$cntrl}
1381                     : sprintf('\%2x', ord($cntrl)) );
1382         if ($opts{-nohtml}) {
1383                 return $chr;
1384         } else {
1385                 return "<span class=\"cntrl\">$chr</span>";
1386         }
1387 }
1388
1389 # Alternatively use unicode control pictures codepoints,
1390 # Unicode "printable representation" (PR)
1391 sub quot_upr {
1392         my $cntrl = shift;
1393         my %opts = @_;
1394
1395         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1396         if ($opts{-nohtml}) {
1397                 return $chr;
1398         } else {
1399                 return "<span class=\"cntrl\">$chr</span>";
1400         }
1401 }
1402
1403 # git may return quoted and escaped filenames
1404 sub unquote {
1405         my $str = shift;
1406
1407         sub unq {
1408                 my $seq = shift;
1409                 my %es = ( # character escape codes, aka escape sequences
1410                         't' => "\t",   # tab            (HT, TAB)
1411                         'n' => "\n",   # newline        (NL)
1412                         'r' => "\r",   # return         (CR)
1413                         'f' => "\f",   # form feed      (FF)
1414                         'b' => "\b",   # backspace      (BS)
1415                         'a' => "\a",   # alarm (bell)   (BEL)
1416                         'e' => "\e",   # escape         (ESC)
1417                         'v' => "\013", # vertical tab   (VT)
1418                 );
1419
1420                 if ($seq =~ m/^[0-7]{1,3}$/) {
1421                         # octal char sequence
1422                         return chr(oct($seq));
1423                 } elsif (exists $es{$seq}) {
1424                         # C escape sequence, aka character escape code
1425                         return $es{$seq};
1426                 }
1427                 # quoted ordinary character
1428                 return $seq;
1429         }
1430
1431         if ($str =~ m/^"(.*)"$/) {
1432                 # needs unquoting
1433                 $str = $1;
1434                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1435         }
1436         return $str;
1437 }
1438
1439 # escape tabs (convert tabs to spaces)
1440 sub untabify {
1441         my $line = shift;
1442
1443         while ((my $pos = index($line, "\t")) != -1) {
1444                 if (my $count = (8 - ($pos % 8))) {
1445                         my $spaces = ' ' x $count;
1446                         $line =~ s/\t/$spaces/;
1447                 }
1448         }
1449
1450         return $line;
1451 }
1452
1453 sub project_in_list {
1454         my $project = shift;
1455         my @list = git_get_projects_list();
1456         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1457 }
1458
1459 ## ----------------------------------------------------------------------
1460 ## HTML aware string manipulation
1461
1462 # Try to chop given string on a word boundary between position
1463 # $len and $len+$add_len. If there is no word boundary there,
1464 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1465 # (marking chopped part) would be longer than given string.
1466 sub chop_str {
1467         my $str = shift;
1468         my $len = shift;
1469         my $add_len = shift || 10;
1470         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1471
1472         # Make sure perl knows it is utf8 encoded so we don't
1473         # cut in the middle of a utf8 multibyte char.
1474         $str = to_utf8($str);
1475
1476         # allow only $len chars, but don't cut a word if it would fit in $add_len
1477         # if it doesn't fit, cut it if it's still longer than the dots we would add
1478         # remove chopped character entities entirely
1479
1480         # when chopping in the middle, distribute $len into left and right part
1481         # return early if chopping wouldn't make string shorter
1482         if ($where eq 'center') {
1483                 return $str if ($len + 5 >= length($str)); # filler is length 5
1484                 $len = int($len/2);
1485         } else {
1486                 return $str if ($len + 4 >= length($str)); # filler is length 4
1487         }
1488
1489         # regexps: ending and beginning with word part up to $add_len
1490         my $endre = qr/.{$len}\w{0,$add_len}/;
1491         my $begre = qr/\w{0,$add_len}.{$len}/;
1492
1493         if ($where eq 'left') {
1494                 $str =~ m/^(.*?)($begre)$/;
1495                 my ($lead, $body) = ($1, $2);
1496                 if (length($lead) > 4) {
1497                         $lead = " ...";
1498                 }
1499                 return "$lead$body";
1500
1501         } elsif ($where eq 'center') {
1502                 $str =~ m/^($endre)(.*)$/;
1503                 my ($left, $str)  = ($1, $2);
1504                 $str =~ m/^(.*?)($begre)$/;
1505                 my ($mid, $right) = ($1, $2);
1506                 if (length($mid) > 5) {
1507                         $mid = " ... ";
1508                 }
1509                 return "$left$mid$right";
1510
1511         } else {
1512                 $str =~ m/^($endre)(.*)$/;
1513                 my $body = $1;
1514                 my $tail = $2;
1515                 if (length($tail) > 4) {
1516                         $tail = "... ";
1517                 }
1518                 return "$body$tail";
1519         }
1520 }
1521
1522 # takes the same arguments as chop_str, but also wraps a <span> around the
1523 # result with a title attribute if it does get chopped. Additionally, the
1524 # string is HTML-escaped.
1525 sub chop_and_escape_str {
1526         my ($str) = @_;
1527
1528         my $chopped = chop_str(@_);
1529         if ($chopped eq $str) {
1530                 return esc_html($chopped);
1531         } else {
1532                 $str =~ s/[[:cntrl:]]/?/g;
1533                 return $cgi->span({-title=>$str}, esc_html($chopped));
1534         }
1535 }
1536
1537 ## ----------------------------------------------------------------------
1538 ## functions returning short strings
1539
1540 # CSS class for given age value (in seconds)
1541 sub age_class {
1542         my $age = shift;
1543
1544         if (!defined $age) {
1545                 return "noage";
1546         } elsif ($age < 60*60*2) {
1547                 return "age0";
1548         } elsif ($age < 60*60*24*2) {
1549                 return "age1";
1550         } else {
1551                 return "age2";
1552         }
1553 }
1554
1555 # convert age in seconds to "nn units ago" string
1556 sub age_string {
1557         my $age = shift;
1558         my $age_str;
1559
1560         if ($age > 60*60*24*365*2) {
1561                 $age_str = (int $age/60/60/24/365);
1562                 $age_str .= " years ago";
1563         } elsif ($age > 60*60*24*(365/12)*2) {
1564                 $age_str = int $age/60/60/24/(365/12);
1565                 $age_str .= " months ago";
1566         } elsif ($age > 60*60*24*7*2) {
1567                 $age_str = int $age/60/60/24/7;
1568                 $age_str .= " weeks ago";
1569         } elsif ($age > 60*60*24*2) {
1570                 $age_str = int $age/60/60/24;
1571                 $age_str .= " days ago";
1572         } elsif ($age > 60*60*2) {
1573                 $age_str = int $age/60/60;
1574                 $age_str .= " hours ago";
1575         } elsif ($age > 60*2) {
1576                 $age_str = int $age/60;
1577                 $age_str .= " min ago";
1578         } elsif ($age > 2) {
1579                 $age_str = int $age;
1580                 $age_str .= " sec ago";
1581         } else {
1582                 $age_str .= " right now";
1583         }
1584         return $age_str;
1585 }
1586
1587 use constant {
1588         S_IFINVALID => 0030000,
1589         S_IFGITLINK => 0160000,
1590 };
1591
1592 # submodule/subproject, a commit object reference
1593 sub S_ISGITLINK {
1594         my $mode = shift;
1595
1596         return (($mode & S_IFMT) == S_IFGITLINK)
1597 }
1598
1599 # convert file mode in octal to symbolic file mode string
1600 sub mode_str {
1601         my $mode = oct shift;
1602
1603         if (S_ISGITLINK($mode)) {
1604                 return 'm---------';
1605         } elsif (S_ISDIR($mode & S_IFMT)) {
1606                 return 'drwxr-xr-x';
1607         } elsif (S_ISLNK($mode)) {
1608                 return 'lrwxrwxrwx';
1609         } elsif (S_ISREG($mode)) {
1610                 # git cares only about the executable bit
1611                 if ($mode & S_IXUSR) {
1612                         return '-rwxr-xr-x';
1613                 } else {
1614                         return '-rw-r--r--';
1615                 };
1616         } else {
1617                 return '----------';
1618         }
1619 }
1620
1621 # convert file mode in octal to file type string
1622 sub file_type {
1623         my $mode = shift;
1624
1625         if ($mode !~ m/^[0-7]+$/) {
1626                 return $mode;
1627         } else {
1628                 $mode = oct $mode;
1629         }
1630
1631         if (S_ISGITLINK($mode)) {
1632                 return "submodule";
1633         } elsif (S_ISDIR($mode & S_IFMT)) {
1634                 return "directory";
1635         } elsif (S_ISLNK($mode)) {
1636                 return "symlink";
1637         } elsif (S_ISREG($mode)) {
1638                 return "file";
1639         } else {
1640                 return "unknown";
1641         }
1642 }
1643
1644 # convert file mode in octal to file type description string
1645 sub file_type_long {
1646         my $mode = shift;
1647
1648         if ($mode !~ m/^[0-7]+$/) {
1649                 return $mode;
1650         } else {
1651                 $mode = oct $mode;
1652         }
1653
1654         if (S_ISGITLINK($mode)) {
1655                 return "submodule";
1656         } elsif (S_ISDIR($mode & S_IFMT)) {
1657                 return "directory";
1658         } elsif (S_ISLNK($mode)) {
1659                 return "symlink";
1660         } elsif (S_ISREG($mode)) {
1661                 if ($mode & S_IXUSR) {
1662                         return "executable";
1663                 } else {
1664                         return "file";
1665                 };
1666         } else {
1667                 return "unknown";
1668         }
1669 }
1670
1671
1672 ## ----------------------------------------------------------------------
1673 ## functions returning short HTML fragments, or transforming HTML fragments
1674 ## which don't belong to other sections
1675
1676 # format line of commit message.
1677 sub format_log_line_html {
1678         my $line = shift;
1679
1680         $line = esc_html($line, -nbsp=>1);
1681         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1682                 $cgi->a({-href => href(action=>"object", hash=>$1),
1683                                         -class => "text"}, $1);
1684         }eg;
1685
1686         return $line;
1687 }
1688
1689 # format marker of refs pointing to given object
1690
1691 # the destination action is chosen based on object type and current context:
1692 # - for annotated tags, we choose the tag view unless it's the current view
1693 #   already, in which case we go to shortlog view
1694 # - for other refs, we keep the current view if we're in history, shortlog or
1695 #   log view, and select shortlog otherwise
1696 sub format_ref_marker {
1697         my ($refs, $id) = @_;
1698         my $markers = '';
1699
1700         if (defined $refs->{$id}) {
1701                 foreach my $ref (@{$refs->{$id}}) {
1702                         # this code exploits the fact that non-lightweight tags are the
1703                         # only indirect objects, and that they are the only objects for which
1704                         # we want to use tag instead of shortlog as action
1705                         my ($type, $name) = qw();
1706                         my $indirect = ($ref =~ s/\^\{\}$//);
1707                         # e.g. tags/v2.6.11 or heads/next
1708                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1709                                 $type = $1;
1710                                 $name = $2;
1711                         } else {
1712                                 $type = "ref";
1713                                 $name = $ref;
1714                         }
1715
1716                         my $class = $type;
1717                         $class .= " indirect" if $indirect;
1718
1719                         my $dest_action = "shortlog";
1720
1721                         if ($indirect) {
1722                                 $dest_action = "tag" unless $action eq "tag";
1723                         } elsif ($action =~ /^(history|(short)?log)$/) {
1724                                 $dest_action = $action;
1725                         }
1726
1727                         my $dest = "";
1728                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1729                         $dest .= $ref;
1730
1731                         my $link = $cgi->a({
1732                                 -href => href(
1733                                         action=>$dest_action,
1734                                         hash=>$dest
1735                                 )}, $name);
1736
1737                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1738                                 $link . "</span>";
1739                 }
1740         }
1741
1742         if ($markers) {
1743                 return ' <span class="refs">'. $markers . '</span>';
1744         } else {
1745                 return "";
1746         }
1747 }
1748
1749 # format, perhaps shortened and with markers, title line
1750 sub format_subject_html {
1751         my ($long, $short, $href, $extra) = @_;
1752         $extra = '' unless defined($extra);
1753
1754         if (length($short) < length($long)) {
1755                 $long =~ s/[[:cntrl:]]/?/g;
1756                 return $cgi->a({-href => $href, -class => "list subject",
1757                                 -title => to_utf8($long)},
1758                        esc_html($short)) . $extra;
1759         } else {
1760                 return $cgi->a({-href => $href, -class => "list subject"},
1761                        esc_html($long)) . $extra;
1762         }
1763 }
1764
1765 # Rather than recomputing the url for an email multiple times, we cache it
1766 # after the first hit. This gives a visible benefit in views where the avatar
1767 # for the same email is used repeatedly (e.g. shortlog).
1768 # The cache is shared by all avatar engines (currently gravatar only), which
1769 # are free to use it as preferred. Since only one avatar engine is used for any
1770 # given page, there's no risk for cache conflicts.
1771 our %avatar_cache = ();
1772
1773 # Compute the picon url for a given email, by using the picon search service over at
1774 # http://www.cs.indiana.edu/picons/search.html
1775 sub picon_url {
1776         my $email = lc shift;
1777         if (!$avatar_cache{$email}) {
1778                 my ($user, $domain) = split('@', $email);
1779                 $avatar_cache{$email} =
1780                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1781                         "$domain/$user/" .
1782                         "users+domains+unknown/up/single";
1783         }
1784         return $avatar_cache{$email};
1785 }
1786
1787 # Compute the gravatar url for a given email, if it's not in the cache already.
1788 # Gravatar stores only the part of the URL before the size, since that's the
1789 # one computationally more expensive. This also allows reuse of the cache for
1790 # different sizes (for this particular engine).
1791 sub gravatar_url {
1792         my $email = lc shift;
1793         my $size = shift;
1794         $avatar_cache{$email} ||=
1795                 "http://www.gravatar.com/avatar/" .
1796                         Digest::MD5::md5_hex($email) . "?s=";
1797         return $avatar_cache{$email} . $size;
1798 }
1799
1800 # Insert an avatar for the given $email at the given $size if the feature
1801 # is enabled.
1802 sub git_get_avatar {
1803         my ($email, %opts) = @_;
1804         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1805         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1806         $opts{-size} ||= 'default';
1807         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1808         my $url = "";
1809         if ($git_avatar eq 'gravatar') {
1810                 $url = gravatar_url($email, $size);
1811         } elsif ($git_avatar eq 'picon') {
1812                 $url = picon_url($email);
1813         }
1814         # Other providers can be added by extending the if chain, defining $url
1815         # as needed. If no variant puts something in $url, we assume avatars
1816         # are completely disabled/unavailable.
1817         if ($url) {
1818                 return $pre_white .
1819                        "<img width=\"$size\" " .
1820                             "class=\"avatar\" " .
1821                             "src=\"$url\" " .
1822                             "alt=\"\" " .
1823                        "/>" . $post_white;
1824         } else {
1825                 return "";
1826         }
1827 }
1828
1829 sub format_search_author {
1830         my ($author, $searchtype, $displaytext) = @_;
1831         my $have_search = gitweb_check_feature('search');
1832
1833         if ($have_search) {
1834                 my $performed = "";
1835                 if ($searchtype eq 'author') {
1836                         $performed = "authored";
1837                 } elsif ($searchtype eq 'committer') {
1838                         $performed = "committed";
1839                 }
1840
1841                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1842                                 searchtext=>$author,
1843                                 searchtype=>$searchtype), class=>"list",
1844                                 title=>"Search for commits $performed by $author"},
1845                                 $displaytext);
1846
1847         } else {
1848                 return $displaytext;
1849         }
1850 }
1851
1852 # format the author name of the given commit with the given tag
1853 # the author name is chopped and escaped according to the other
1854 # optional parameters (see chop_str).
1855 sub format_author_html {
1856         my $tag = shift;
1857         my $co = shift;
1858         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1859         return "<$tag class=\"author\">" .
1860                format_search_author($co->{'author_name'}, "author",
1861                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1862                        $author) .
1863                "</$tag>";
1864 }
1865
1866 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1867 sub format_git_diff_header_line {
1868         my $line = shift;
1869         my $diffinfo = shift;
1870         my ($from, $to) = @_;
1871
1872         if ($diffinfo->{'nparents'}) {
1873                 # combined diff
1874                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1875                 if ($to->{'href'}) {
1876                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1877                                          esc_path($to->{'file'}));
1878                 } else { # file was deleted (no href)
1879                         $line .= esc_path($to->{'file'});
1880                 }
1881         } else {
1882                 # "ordinary" diff
1883                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1884                 if ($from->{'href'}) {
1885                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1886                                          'a/' . esc_path($from->{'file'}));
1887                 } else { # file was added (no href)
1888                         $line .= 'a/' . esc_path($from->{'file'});
1889                 }
1890                 $line .= ' ';
1891                 if ($to->{'href'}) {
1892                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1893                                          'b/' . esc_path($to->{'file'}));
1894                 } else { # file was deleted
1895                         $line .= 'b/' . esc_path($to->{'file'});
1896                 }
1897         }
1898
1899         return "<div class=\"diff header\">$line</div>\n";
1900 }
1901
1902 # format extended diff header line, before patch itself
1903 sub format_extended_diff_header_line {
1904         my $line = shift;
1905         my $diffinfo = shift;
1906         my ($from, $to) = @_;
1907
1908         # match <path>
1909         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1910                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1911                                        esc_path($from->{'file'}));
1912         }
1913         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1914                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1915                                  esc_path($to->{'file'}));
1916         }
1917         # match single <mode>
1918         if ($line =~ m/\s(\d{6})$/) {
1919                 $line .= '<span class="info"> (' .
1920                          file_type_long($1) .
1921                          ')</span>';
1922         }
1923         # match <hash>
1924         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1925                 # can match only for combined diff
1926                 $line = 'index ';
1927                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1928                         if ($from->{'href'}[$i]) {
1929                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1930                                                   -class=>"hash"},
1931                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1932                         } else {
1933                                 $line .= '0' x 7;
1934                         }
1935                         # separator
1936                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1937                 }
1938                 $line .= '..';
1939                 if ($to->{'href'}) {
1940                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1941                                          substr($diffinfo->{'to_id'},0,7));
1942                 } else {
1943                         $line .= '0' x 7;
1944                 }
1945
1946         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1947                 # can match only for ordinary diff
1948                 my ($from_link, $to_link);
1949                 if ($from->{'href'}) {
1950                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1951                                              substr($diffinfo->{'from_id'},0,7));
1952                 } else {
1953                         $from_link = '0' x 7;
1954                 }
1955                 if ($to->{'href'}) {
1956                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1957                                            substr($diffinfo->{'to_id'},0,7));
1958                 } else {
1959                         $to_link = '0' x 7;
1960                 }
1961                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1962                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1963         }
1964
1965         return $line . "<br/>\n";
1966 }
1967
1968 # format from-file/to-file diff header
1969 sub format_diff_from_to_header {
1970         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1971         my $line;
1972         my $result = '';
1973
1974         $line = $from_line;
1975         #assert($line =~ m/^---/) if DEBUG;
1976         # no extra formatting for "^--- /dev/null"
1977         if (! $diffinfo->{'nparents'}) {
1978                 # ordinary (single parent) diff
1979                 if ($line =~ m!^--- "?a/!) {
1980                         if ($from->{'href'}) {
1981                                 $line = '--- a/' .
1982                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1983                                                 esc_path($from->{'file'}));
1984                         } else {
1985                                 $line = '--- a/' .
1986                                         esc_path($from->{'file'});
1987                         }
1988                 }
1989                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1990
1991         } else {
1992                 # combined diff (merge commit)
1993                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1994                         if ($from->{'href'}[$i]) {
1995                                 $line = '--- ' .
1996                                         $cgi->a({-href=>href(action=>"blobdiff",
1997                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1998                                                              hash_parent_base=>$parents[$i],
1999                                                              file_parent=>$from->{'file'}[$i],
2000                                                              hash=>$diffinfo->{'to_id'},
2001                                                              hash_base=>$hash,
2002                                                              file_name=>$to->{'file'}),
2003                                                  -class=>"path",
2004                                                  -title=>"diff" . ($i+1)},
2005                                                 $i+1) .
2006                                         '/' .
2007                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2008                                                 esc_path($from->{'file'}[$i]));
2009                         } else {
2010                                 $line = '--- /dev/null';
2011                         }
2012                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2013                 }
2014         }
2015
2016         $line = $to_line;
2017         #assert($line =~ m/^\+\+\+/) if DEBUG;
2018         # no extra formatting for "^+++ /dev/null"
2019         if ($line =~ m!^\+\+\+ "?b/!) {
2020                 if ($to->{'href'}) {
2021                         $line = '+++ b/' .
2022                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2023                                         esc_path($to->{'file'}));
2024                 } else {
2025                         $line = '+++ b/' .
2026                                 esc_path($to->{'file'});
2027                 }
2028         }
2029         $result .= qq!<div class="diff to_file">$line</div>\n!;
2030
2031         return $result;
2032 }
2033
2034 # create note for patch simplified by combined diff
2035 sub format_diff_cc_simplified {
2036         my ($diffinfo, @parents) = @_;
2037         my $result = '';
2038
2039         $result .= "<div class=\"diff header\">" .
2040                    "diff --cc ";
2041         if (!is_deleted($diffinfo)) {
2042                 $result .= $cgi->a({-href => href(action=>"blob",
2043                                                   hash_base=>$hash,
2044                                                   hash=>$diffinfo->{'to_id'},
2045                                                   file_name=>$diffinfo->{'to_file'}),
2046                                     -class => "path"},
2047                                    esc_path($diffinfo->{'to_file'}));
2048         } else {
2049                 $result .= esc_path($diffinfo->{'to_file'});
2050         }
2051         $result .= "</div>\n" . # class="diff header"
2052                    "<div class=\"diff nodifferences\">" .
2053                    "Simple merge" .
2054                    "</div>\n"; # class="diff nodifferences"
2055
2056         return $result;
2057 }
2058
2059 # format patch (diff) line (not to be used for diff headers)
2060 sub format_diff_line {
2061         my $line = shift;
2062         my ($from, $to) = @_;
2063         my $diff_class = "";
2064
2065         chomp $line;
2066
2067         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2068                 # combined diff
2069                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2070                 if ($line =~ m/^\@{3}/) {
2071                         $diff_class = " chunk_header";
2072                 } elsif ($line =~ m/^\\/) {
2073                         $diff_class = " incomplete";
2074                 } elsif ($prefix =~ tr/+/+/) {
2075                         $diff_class = " add";
2076                 } elsif ($prefix =~ tr/-/-/) {
2077                         $diff_class = " rem";
2078                 }
2079         } else {
2080                 # assume ordinary diff
2081                 my $char = substr($line, 0, 1);
2082                 if ($char eq '+') {
2083                         $diff_class = " add";
2084                 } elsif ($char eq '-') {
2085                         $diff_class = " rem";
2086                 } elsif ($char eq '@') {
2087                         $diff_class = " chunk_header";
2088                 } elsif ($char eq "\\") {
2089                         $diff_class = " incomplete";
2090                 }
2091         }
2092         $line = untabify($line);
2093         if ($from && $to && $line =~ m/^\@{2} /) {
2094                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2095                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2096
2097                 $from_lines = 0 unless defined $from_lines;
2098                 $to_lines   = 0 unless defined $to_lines;
2099
2100                 if ($from->{'href'}) {
2101                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2102                                              -class=>"list"}, $from_text);
2103                 }
2104                 if ($to->{'href'}) {
2105                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2106                                              -class=>"list"}, $to_text);
2107                 }
2108                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2109                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2110                 return "<div class=\"diff$diff_class\">$line</div>\n";
2111         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2112                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2113                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2114
2115                 @from_text = split(' ', $ranges);
2116                 for (my $i = 0; $i < @from_text; ++$i) {
2117                         ($from_start[$i], $from_nlines[$i]) =
2118                                 (split(',', substr($from_text[$i], 1)), 0);
2119                 }
2120
2121                 $to_text   = pop @from_text;
2122                 $to_start  = pop @from_start;
2123                 $to_nlines = pop @from_nlines;
2124
2125                 $line = "<span class=\"chunk_info\">$prefix ";
2126                 for (my $i = 0; $i < @from_text; ++$i) {
2127                         if ($from->{'href'}[$i]) {
2128                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2129                                                   -class=>"list"}, $from_text[$i]);
2130                         } else {
2131                                 $line .= $from_text[$i];
2132                         }
2133                         $line .= " ";
2134                 }
2135                 if ($to->{'href'}) {
2136                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2137                                           -class=>"list"}, $to_text);
2138                 } else {
2139                         $line .= $to_text;
2140                 }
2141                 $line .= " $prefix</span>" .
2142                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2143                 return "<div class=\"diff$diff_class\">$line</div>\n";
2144         }
2145         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2146 }
2147
2148 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2149 # linked.  Pass the hash of the tree/commit to snapshot.
2150 sub format_snapshot_links {
2151         my ($hash) = @_;
2152         my $num_fmts = @snapshot_fmts;
2153         if ($num_fmts > 1) {
2154                 # A parenthesized list of links bearing format names.
2155                 # e.g. "snapshot (_tar.gz_ _zip_)"
2156                 return "snapshot (" . join(' ', map
2157                         $cgi->a({
2158                                 -href => href(
2159                                         action=>"snapshot",
2160                                         hash=>$hash,
2161                                         snapshot_format=>$_
2162                                 )
2163                         }, $known_snapshot_formats{$_}{'display'})
2164                 , @snapshot_fmts) . ")";
2165         } elsif ($num_fmts == 1) {
2166                 # A single "snapshot" link whose tooltip bears the format name.
2167                 # i.e. "_snapshot_"
2168                 my ($fmt) = @snapshot_fmts;
2169                 return
2170                         $cgi->a({
2171                                 -href => href(
2172                                         action=>"snapshot",
2173                                         hash=>$hash,
2174                                         snapshot_format=>$fmt
2175                                 ),
2176                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2177                         }, "snapshot");
2178         } else { # $num_fmts == 0
2179                 return undef;
2180         }
2181 }
2182
2183 ## ......................................................................
2184 ## functions returning values to be passed, perhaps after some
2185 ## transformation, to other functions; e.g. returning arguments to href()
2186
2187 # returns hash to be passed to href to generate gitweb URL
2188 # in -title key it returns description of link
2189 sub get_feed_info {
2190         my $format = shift || 'Atom';
2191         my %res = (action => lc($format));
2192
2193         # feed links are possible only for project views
2194         return unless (defined $project);
2195         # some views should link to OPML, or to generic project feed,
2196         # or don't have specific feed yet (so they should use generic)
2197         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2198
2199         my $branch;
2200         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2201         # from tag links; this also makes possible to detect branch links
2202         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2203             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2204                 $branch = $1;
2205         }
2206         # find log type for feed description (title)
2207         my $type = 'log';
2208         if (defined $file_name) {
2209                 $type  = "history of $file_name";
2210                 $type .= "/" if ($action eq 'tree');
2211                 $type .= " on '$branch'" if (defined $branch);
2212         } else {
2213                 $type = "log of $branch" if (defined $branch);
2214         }
2215
2216         $res{-title} = $type;
2217         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2218         $res{'file_name'} = $file_name;
2219
2220         return %res;
2221 }
2222
2223 ## ----------------------------------------------------------------------
2224 ## git utility subroutines, invoking git commands
2225
2226 # returns path to the core git executable and the --git-dir parameter as list
2227 sub git_cmd {
2228         $number_of_git_cmds++;
2229         return $GIT, '--git-dir='.$git_dir;
2230 }
2231
2232 # quote the given arguments for passing them to the shell
2233 # quote_command("command", "arg 1", "arg with ' and ! characters")
2234 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2235 # Try to avoid using this function wherever possible.
2236 sub quote_command {
2237         return join(' ',
2238                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2239 }
2240
2241 # get HEAD ref of given project as hash
2242 sub git_get_head_hash {
2243         return git_get_full_hash(shift, 'HEAD');
2244 }
2245
2246 sub git_get_full_hash {
2247         return git_get_hash(@_);
2248 }
2249
2250 sub git_get_short_hash {
2251         return git_get_hash(@_, '--short=7');
2252 }
2253
2254 sub git_get_hash {
2255         my ($project, $hash, @options) = @_;
2256         my $o_git_dir = $git_dir;
2257         my $retval = undef;
2258         $git_dir = "$projectroot/$project";
2259         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2260             '--verify', '-q', @options, $hash) {
2261                 $retval = <$fd>;
2262                 chomp $retval if defined $retval;
2263                 close $fd;
2264         }
2265         if (defined $o_git_dir) {
2266                 $git_dir = $o_git_dir;
2267         }
2268         return $retval;
2269 }
2270
2271 # get type of given object
2272 sub git_get_type {
2273         my $hash = shift;
2274
2275         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2276         my $type = <$fd>;
2277         close $fd or return;
2278         chomp $type;
2279         return $type;
2280 }
2281
2282 # repository configuration
2283 our $config_file = '';
2284 our %config;
2285
2286 # store multiple values for single key as anonymous array reference
2287 # single values stored directly in the hash, not as [ <value> ]
2288 sub hash_set_multi {
2289         my ($hash, $key, $value) = @_;
2290
2291         if (!exists $hash->{$key}) {
2292                 $hash->{$key} = $value;
2293         } elsif (!ref $hash->{$key}) {
2294                 $hash->{$key} = [ $hash->{$key}, $value ];
2295         } else {
2296                 push @{$hash->{$key}}, $value;
2297         }
2298 }
2299
2300 # return hash of git project configuration
2301 # optionally limited to some section, e.g. 'gitweb'
2302 sub git_parse_project_config {
2303         my $section_regexp = shift;
2304         my %config;
2305
2306         local $/ = "\0";
2307
2308         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2309                 or return;
2310
2311         while (my $keyval = <$fh>) {
2312                 chomp $keyval;
2313                 my ($key, $value) = split(/\n/, $keyval, 2);
2314
2315                 hash_set_multi(\%config, $key, $value)
2316                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2317         }
2318         close $fh;
2319
2320         return %config;
2321 }
2322
2323 # convert config value to boolean: 'true' or 'false'
2324 # no value, number > 0, 'true' and 'yes' values are true
2325 # rest of values are treated as false (never as error)
2326 sub config_to_bool {
2327         my $val = shift;
2328
2329         return 1 if !defined $val;             # section.key
2330
2331         # strip leading and trailing whitespace
2332         $val =~ s/^\s+//;
2333         $val =~ s/\s+$//;
2334
2335         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2336                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2337 }
2338
2339 # convert config value to simple decimal number
2340 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2341 # to be multiplied by 1024, 1048576, or 1073741824
2342 sub config_to_int {
2343         my $val = shift;
2344
2345         # strip leading and trailing whitespace
2346         $val =~ s/^\s+//;
2347         $val =~ s/\s+$//;
2348
2349         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2350                 $unit = lc($unit);
2351                 # unknown unit is treated as 1
2352                 return $num * ($unit eq 'g' ? 1073741824 :
2353                                $unit eq 'm' ?    1048576 :
2354                                $unit eq 'k' ?       1024 : 1);
2355         }
2356         return $val;
2357 }
2358
2359 # convert config value to array reference, if needed
2360 sub config_to_multi {
2361         my $val = shift;
2362
2363         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2364 }
2365
2366 sub git_get_project_config {
2367         my ($key, $type) = @_;
2368
2369         return unless defined $git_dir;
2370
2371         # key sanity check
2372         return unless ($key);
2373         $key =~ s/^gitweb\.//;
2374         return if ($key =~ m/\W/);
2375
2376         # type sanity check
2377         if (defined $type) {
2378                 $type =~ s/^--//;
2379                 $type = undef
2380                         unless ($type eq 'bool' || $type eq 'int');
2381         }
2382
2383         # get config
2384         if (!defined $config_file ||
2385             $config_file ne "$git_dir/config") {
2386                 %config = git_parse_project_config('gitweb');
2387                 $config_file = "$git_dir/config";
2388         }
2389
2390         # check if config variable (key) exists
2391         return unless exists $config{"gitweb.$key"};
2392
2393         # ensure given type
2394         if (!defined $type) {
2395                 return $config{"gitweb.$key"};
2396         } elsif ($type eq 'bool') {
2397                 # backward compatibility: 'git config --bool' returns true/false
2398                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2399         } elsif ($type eq 'int') {
2400                 return config_to_int($config{"gitweb.$key"});
2401         }
2402         return $config{"gitweb.$key"};
2403 }
2404
2405 # get hash of given path at given ref
2406 sub git_get_hash_by_path {
2407         my $base = shift;
2408         my $path = shift || return undef;
2409         my $type = shift;
2410
2411         $path =~ s,/+$,,;
2412
2413         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2414                 or die_error(500, "Open git-ls-tree failed");
2415         my $line = <$fd>;
2416         close $fd or return undef;
2417
2418         if (!defined $line) {
2419                 # there is no tree or hash given by $path at $base
2420                 return undef;
2421         }
2422
2423         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2424         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2425         if (defined $type && $type ne $2) {
2426                 # type doesn't match
2427                 return undef;
2428         }
2429         return $3;
2430 }
2431
2432 # get path of entry with given hash at given tree-ish (ref)
2433 # used to get 'from' filename for combined diff (merge commit) for renames
2434 sub git_get_path_by_hash {
2435         my $base = shift || return;
2436         my $hash = shift || return;
2437
2438         local $/ = "\0";
2439
2440         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2441                 or return undef;
2442         while (my $line = <$fd>) {
2443                 chomp $line;
2444
2445                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2446                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2447                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2448                         close $fd;
2449                         return $1;
2450                 }
2451         }
2452         close $fd;
2453         return undef;
2454 }
2455
2456 ## ......................................................................
2457 ## git utility functions, directly accessing git repository
2458
2459 sub git_get_project_description {
2460         my $path = shift;
2461
2462         $git_dir = "$projectroot/$path";
2463         open my $fd, '<', "$git_dir/description"
2464                 or return git_get_project_config('description');
2465         my $descr = <$fd>;
2466         close $fd;
2467         if (defined $descr) {
2468                 chomp $descr;
2469         }
2470         return $descr;
2471 }
2472
2473 sub git_get_project_ctags {
2474         my $path = shift;
2475         my $ctags = {};
2476
2477         $git_dir = "$projectroot/$path";
2478         opendir my $dh, "$git_dir/ctags"
2479                 or return $ctags;
2480         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2481                 open my $ct, '<', $_ or next;
2482                 my $val = <$ct>;
2483                 chomp $val;
2484                 close $ct;
2485                 my $ctag = $_; $ctag =~ s#.*/##;
2486                 $ctags->{$ctag} = $val;
2487         }
2488         closedir $dh;
2489         $ctags;
2490 }
2491
2492 sub git_populate_project_tagcloud {
2493         my $ctags = shift;
2494
2495         # First, merge different-cased tags; tags vote on casing
2496         my %ctags_lc;
2497         foreach (keys %$ctags) {
2498                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2499                 if (not $ctags_lc{lc $_}->{topcount}
2500                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2501                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2502                         $ctags_lc{lc $_}->{topname} = $_;
2503                 }
2504         }
2505
2506         my $cloud;
2507         if (eval { require HTML::TagCloud; 1; }) {
2508                 $cloud = HTML::TagCloud->new;
2509                 foreach (sort keys %ctags_lc) {
2510                         # Pad the title with spaces so that the cloud looks
2511                         # less crammed.
2512                         my $title = $ctags_lc{$_}->{topname};
2513                         $title =~ s/ /&nbsp;/g;
2514                         $title =~ s/^/&nbsp;/g;
2515                         $title =~ s/$/&nbsp;/g;
2516                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2517                 }
2518         } else {
2519                 $cloud = \%ctags_lc;
2520         }
2521         $cloud;
2522 }
2523
2524 sub git_show_project_tagcloud {
2525         my ($cloud, $count) = @_;
2526         print STDERR ref($cloud)."..\n";
2527         if (ref $cloud eq 'HTML::TagCloud') {
2528                 return $cloud->html_and_css($count);
2529         } else {
2530                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2531                 return '<p align="center">' . join (', ', map {
2532                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2533                 } splice(@tags, 0, $count)) . '</p>';
2534         }
2535 }
2536
2537 sub git_get_project_url_list {
2538         my $path = shift;
2539
2540         $git_dir = "$projectroot/$path";
2541         open my $fd, '<', "$git_dir/cloneurl"
2542                 or return wantarray ?
2543                 @{ config_to_multi(git_get_project_config('url')) } :
2544                    config_to_multi(git_get_project_config('url'));
2545         my @git_project_url_list = map { chomp; $_ } <$fd>;
2546         close $fd;
2547
2548         return wantarray ? @git_project_url_list : \@git_project_url_list;
2549 }
2550
2551 sub git_get_projects_list {
2552         my ($filter) = @_;
2553         my @list;
2554
2555         $filter ||= '';
2556         $filter =~ s/\.git$//;
2557
2558         my $check_forks = gitweb_check_feature('forks');
2559
2560         if (-d $projects_list) {
2561                 # search in directory
2562                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2563                 # remove the trailing "/"
2564                 $dir =~ s!/+$!!;
2565                 my $pfxlen = length("$dir");
2566                 my $pfxdepth = ($dir =~ tr!/!!);
2567
2568                 File::Find::find({
2569                         follow_fast => 1, # follow symbolic links
2570                         follow_skip => 2, # ignore duplicates
2571                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2572                         wanted => sub {
2573                                 # global variables
2574                                 our $project_maxdepth;
2575                                 our $projectroot;
2576                                 # skip project-list toplevel, if we get it.
2577                                 return if (m!^[/.]$!);
2578                                 # only directories can be git repositories
2579                                 return unless (-d $_);
2580                                 # don't traverse too deep (Find is super slow on os x)
2581                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2582                                         $File::Find::prune = 1;
2583                                         return;
2584                                 }
2585
2586                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2587                                 # we check related file in $projectroot
2588                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2589                                 if (check_export_ok("$projectroot/$path")) {
2590                                         push @list, { path => $path };
2591                                         $File::Find::prune = 1;
2592                                 }
2593                         },
2594                 }, "$dir");
2595
2596         } elsif (-f $projects_list) {
2597                 # read from file(url-encoded):
2598                 # 'git%2Fgit.git Linus+Torvalds'
2599                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2600                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2601                 my %paths;
2602                 open my $fd, '<', $projects_list or return;
2603         PROJECT:
2604                 while (my $line = <$fd>) {
2605                         chomp $line;
2606                         my ($path, $owner) = split ' ', $line;
2607                         $path = unescape($path);
2608                         $owner = unescape($owner);
2609                         if (!defined $path) {
2610                                 next;
2611                         }
2612                         if ($filter ne '') {
2613                                 # looking for forks;
2614                                 my $pfx = substr($path, 0, length($filter));
2615                                 if ($pfx ne $filter) {
2616                                         next PROJECT;
2617                                 }
2618                                 my $sfx = substr($path, length($filter));
2619                                 if ($sfx !~ /^\/.*\.git$/) {
2620                                         next PROJECT;
2621                                 }
2622                         } elsif ($check_forks) {
2623                         PATH:
2624                                 foreach my $filter (keys %paths) {
2625                                         # looking for forks;
2626                                         my $pfx = substr($path, 0, length($filter));
2627                                         if ($pfx ne $filter) {
2628                                                 next PATH;
2629                                         }
2630                                         my $sfx = substr($path, length($filter));
2631                                         if ($sfx !~ /^\/.*\.git$/) {
2632                                                 next PATH;
2633                                         }
2634                                         # is a fork, don't include it in
2635                                         # the list
2636                                         next PROJECT;
2637                                 }
2638                         }
2639                         if (check_export_ok("$projectroot/$path")) {
2640                                 my $pr = {
2641                                         path => $path,
2642                                         owner => to_utf8($owner),
2643                                 };
2644                                 push @list, $pr;
2645                                 (my $forks_path = $path) =~ s/\.git$//;
2646                                 $paths{$forks_path}++;
2647                         }
2648                 }
2649                 close $fd;
2650         }
2651         return @list;
2652 }
2653
2654 our $gitweb_project_owner = undef;
2655 sub git_get_project_list_from_file {
2656
2657         return if (defined $gitweb_project_owner);
2658
2659         $gitweb_project_owner = {};
2660         # read from file (url-encoded):
2661         # 'git%2Fgit.git Linus+Torvalds'
2662         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2663         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2664         if (-f $projects_list) {
2665                 open(my $fd, '<', $projects_list);
2666                 while (my $line = <$fd>) {
2667                         chomp $line;
2668                         my ($pr, $ow) = split ' ', $line;
2669                         $pr = unescape($pr);
2670                         $ow = unescape($ow);
2671                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2672                 }
2673                 close $fd;
2674         }
2675 }
2676
2677 sub git_get_project_owner {
2678         my $project = shift;
2679         my $owner;
2680
2681         return undef unless $project;
2682         $git_dir = "$projectroot/$project";
2683
2684         if (!defined $gitweb_project_owner) {
2685                 git_get_project_list_from_file();
2686         }
2687
2688         if (exists $gitweb_project_owner->{$project}) {
2689                 $owner = $gitweb_project_owner->{$project};
2690         }
2691         if (!defined $owner){
2692                 $owner = git_get_project_config('owner');
2693         }
2694         if (!defined $owner) {
2695                 $owner = get_file_owner("$git_dir");
2696         }
2697
2698         return $owner;
2699 }
2700
2701 sub git_get_last_activity {
2702         my ($path) = @_;
2703         my $fd;
2704
2705         $git_dir = "$projectroot/$path";
2706         open($fd, "-|", git_cmd(), 'for-each-ref',
2707              '--format=%(committer)',
2708              '--sort=-committerdate',
2709              '--count=1',
2710              'refs/heads') or return;
2711         my $most_recent = <$fd>;
2712         close $fd or return;
2713         if (defined $most_recent &&
2714             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2715                 my $timestamp = $1;
2716                 my $age = time - $timestamp;
2717                 return ($age, age_string($age));
2718         }
2719         return (undef, undef);
2720 }
2721
2722 sub git_get_references {
2723         my $type = shift || "";
2724         my %refs;
2725         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2726         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2727         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2728                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2729                 or return;
2730
2731         while (my $line = <$fd>) {
2732                 chomp $line;
2733                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2734                         if (defined $refs{$1}) {
2735                                 push @{$refs{$1}}, $2;
2736                         } else {
2737                                 $refs{$1} = [ $2 ];
2738                         }
2739                 }
2740         }
2741         close $fd or return;
2742         return \%refs;
2743 }
2744
2745 sub git_get_rev_name_tags {
2746         my $hash = shift || return undef;
2747
2748         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2749                 or return;
2750         my $name_rev = <$fd>;
2751         close $fd;
2752
2753         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2754                 return $1;
2755         } else {
2756                 # catches also '$hash undefined' output
2757                 return undef;
2758         }
2759 }
2760
2761 ## ----------------------------------------------------------------------
2762 ## parse to hash functions
2763
2764 sub parse_date {
2765         my $epoch = shift;
2766         my $tz = shift || "-0000";
2767
2768         my %date;
2769         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2770         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2771         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2772         $date{'hour'} = $hour;
2773         $date{'minute'} = $min;
2774         $date{'mday'} = $mday;
2775         $date{'day'} = $days[$wday];
2776         $date{'month'} = $months[$mon];
2777         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2778                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2779         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2780                              $mday, $months[$mon], $hour ,$min;
2781         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2782                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2783
2784         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2785         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2786         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2787         $date{'hour_local'} = $hour;
2788         $date{'minute_local'} = $min;
2789         $date{'tz_local'} = $tz;
2790         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2791                                   1900+$year, $mon+1, $mday,
2792                                   $hour, $min, $sec, $tz);
2793         return %date;
2794 }
2795
2796 sub parse_tag {
2797         my $tag_id = shift;
2798         my %tag;
2799         my @comment;
2800
2801         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2802         $tag{'id'} = $tag_id;
2803         while (my $line = <$fd>) {
2804                 chomp $line;
2805                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2806                         $tag{'object'} = $1;
2807                 } elsif ($line =~ m/^type (.+)$/) {
2808                         $tag{'type'} = $1;
2809                 } elsif ($line =~ m/^tag (.+)$/) {
2810                         $tag{'name'} = $1;
2811                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2812                         $tag{'author'} = $1;
2813                         $tag{'author_epoch'} = $2;
2814                         $tag{'author_tz'} = $3;
2815                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2816                                 $tag{'author_name'}  = $1;
2817                                 $tag{'author_email'} = $2;
2818                         } else {
2819                                 $tag{'author_name'} = $tag{'author'};
2820                         }
2821                 } elsif ($line =~ m/--BEGIN/) {
2822                         push @comment, $line;
2823                         last;
2824                 } elsif ($line eq "") {
2825                         last;
2826                 }
2827         }
2828         push @comment, <$fd>;
2829         $tag{'comment'} = \@comment;
2830         close $fd or return;
2831         if (!defined $tag{'name'}) {
2832                 return
2833         };
2834         return %tag
2835 }
2836
2837 sub parse_commit_text {
2838         my ($commit_text, $withparents) = @_;
2839         my @commit_lines = split '\n', $commit_text;
2840         my %co;
2841
2842         pop @commit_lines; # Remove '\0'
2843
2844         if (! @commit_lines) {
2845                 return;
2846         }
2847
2848         my $header = shift @commit_lines;
2849         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2850                 return;
2851         }
2852         ($co{'id'}, my @parents) = split ' ', $header;
2853         while (my $line = shift @commit_lines) {
2854                 last if $line eq "\n";
2855                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2856                         $co{'tree'} = $1;
2857                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2858                         push @parents, $1;
2859                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2860                         $co{'author'} = to_utf8($1);
2861                         $co{'author_epoch'} = $2;
2862                         $co{'author_tz'} = $3;
2863                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2864                                 $co{'author_name'}  = $1;
2865                                 $co{'author_email'} = $2;
2866                         } else {
2867                                 $co{'author_name'} = $co{'author'};
2868                         }
2869                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2870                         $co{'committer'} = to_utf8($1);
2871                         $co{'committer_epoch'} = $2;
2872                         $co{'committer_tz'} = $3;
2873                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2874                                 $co{'committer_name'}  = $1;
2875                                 $co{'committer_email'} = $2;
2876                         } else {
2877                                 $co{'committer_name'} = $co{'committer'};
2878                         }
2879                 }
2880         }
2881         if (!defined $co{'tree'}) {
2882                 return;
2883         };
2884         $co{'parents'} = \@parents;
2885         $co{'parent'} = $parents[0];
2886
2887         foreach my $title (@commit_lines) {
2888                 $title =~ s/^    //;
2889                 if ($title ne "") {
2890                         $co{'title'} = chop_str($title, 80, 5);
2891                         # remove leading stuff of merges to make the interesting part visible
2892                         if (length($title) > 50) {
2893                                 $title =~ s/^Automatic //;
2894                                 $title =~ s/^merge (of|with) /Merge ... /i;
2895                                 if (length($title) > 50) {
2896                                         $title =~ s/(http|rsync):\/\///;
2897                                 }
2898                                 if (length($title) > 50) {
2899                                         $title =~ s/(master|www|rsync)\.//;
2900                                 }
2901                                 if (length($title) > 50) {
2902                                         $title =~ s/kernel.org:?//;
2903                                 }
2904                                 if (length($title) > 50) {
2905                                         $title =~ s/\/pub\/scm//;
2906                                 }
2907                         }
2908                         $co{'title_short'} = chop_str($title, 50, 5);
2909                         last;
2910                 }
2911         }
2912         if (! defined $co{'title'} || $co{'title'} eq "") {
2913                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2914         }
2915         # remove added spaces
2916         foreach my $line (@commit_lines) {
2917                 $line =~ s/^    //;
2918         }
2919         $co{'comment'} = \@commit_lines;
2920
2921         my $age = time - $co{'committer_epoch'};
2922         $co{'age'} = $age;
2923         $co{'age_string'} = age_string($age);
2924         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2925         if ($age > 60*60*24*7*2) {
2926                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2927                 $co{'age_string_age'} = $co{'age_string'};
2928         } else {
2929                 $co{'age_string_date'} = $co{'age_string'};
2930                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2931         }
2932         return %co;
2933 }
2934
2935 sub parse_commit {
2936         my ($commit_id) = @_;
2937         my %co;
2938
2939         local $/ = "\0";
2940
2941         open my $fd, "-|", git_cmd(), "rev-list",
2942                 "--parents",
2943                 "--header",
2944                 "--max-count=1",
2945                 $commit_id,
2946                 "--",
2947                 or die_error(500, "Open git-rev-list failed");
2948         %co = parse_commit_text(<$fd>, 1);
2949         close $fd;
2950
2951         return %co;
2952 }
2953
2954 sub parse_commits {
2955         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2956         my @cos;
2957
2958         $maxcount ||= 1;
2959         $skip ||= 0;
2960
2961         local $/ = "\0";
2962
2963         open my $fd, "-|", git_cmd(), "rev-list",
2964                 "--header",
2965                 @args,
2966                 ("--max-count=" . $maxcount),
2967                 ("--skip=" . $skip),
2968                 @extra_options,
2969                 $commit_id,
2970                 "--",
2971                 ($filename ? ($filename) : ())
2972                 or die_error(500, "Open git-rev-list failed");
2973         while (my $line = <$fd>) {
2974                 my %co = parse_commit_text($line);
2975                 push @cos, \%co;
2976         }
2977         close $fd;
2978
2979         return wantarray ? @cos : \@cos;
2980 }
2981
2982 # parse line of git-diff-tree "raw" output
2983 sub parse_difftree_raw_line {
2984         my $line = shift;
2985         my %res;
2986
2987         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2988         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2989         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2990                 $res{'from_mode'} = $1;
2991                 $res{'to_mode'} = $2;
2992                 $res{'from_id'} = $3;
2993                 $res{'to_id'} = $4;
2994                 $res{'status'} = $5;
2995                 $res{'similarity'} = $6;
2996                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2997                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2998                 } else {
2999                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3000                 }
3001         }
3002         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3003         # combined diff (for merge commit)
3004         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3005                 $res{'nparents'}  = length($1);
3006                 $res{'from_mode'} = [ split(' ', $2) ];
3007                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3008                 $res{'from_id'} = [ split(' ', $3) ];
3009                 $res{'to_id'} = pop @{$res{'from_id'}};
3010                 $res{'status'} = [ split('', $4) ];
3011                 $res{'to_file'} = unquote($5);
3012         }
3013         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3014         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3015                 $res{'commit'} = $1;
3016         }
3017
3018         return wantarray ? %res : \%res;
3019 }
3020
3021 # wrapper: return parsed line of git-diff-tree "raw" output
3022 # (the argument might be raw line, or parsed info)
3023 sub parsed_difftree_line {
3024         my $line_or_ref = shift;
3025
3026         if (ref($line_or_ref) eq "HASH") {
3027                 # pre-parsed (or generated by hand)
3028                 return $line_or_ref;
3029         } else {
3030                 return parse_difftree_raw_line($line_or_ref);
3031         }
3032 }
3033
3034 # parse line of git-ls-tree output
3035 sub parse_ls_tree_line {
3036         my $line = shift;
3037         my %opts = @_;
3038         my %res;
3039
3040         if ($opts{'-l'}) {
3041                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3042                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3043
3044                 $res{'mode'} = $1;
3045                 $res{'type'} = $2;
3046                 $res{'hash'} = $3;
3047                 $res{'size'} = $4;
3048                 if ($opts{'-z'}) {
3049                         $res{'name'} = $5;
3050                 } else {
3051                         $res{'name'} = unquote($5);
3052                 }
3053         } else {
3054                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3055                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3056
3057                 $res{'mode'} = $1;
3058                 $res{'type'} = $2;
3059                 $res{'hash'} = $3;
3060                 if ($opts{'-z'}) {
3061                         $res{'name'} = $4;
3062                 } else {
3063                         $res{'name'} = unquote($4);
3064                 }
3065         }
3066
3067         return wantarray ? %res : \%res;
3068 }
3069
3070 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3071 sub parse_from_to_diffinfo {
3072         my ($diffinfo, $from, $to, @parents) = @_;
3073
3074         if ($diffinfo->{'nparents'}) {
3075                 # combined diff
3076                 $from->{'file'} = [];
3077                 $from->{'href'} = [];
3078                 fill_from_file_info($diffinfo, @parents)
3079                         unless exists $diffinfo->{'from_file'};
3080                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3081                         $from->{'file'}[$i] =
3082                                 defined $diffinfo->{'from_file'}[$i] ?
3083                                         $diffinfo->{'from_file'}[$i] :
3084                                         $diffinfo->{'to_file'};
3085                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3086                                 $from->{'href'}[$i] = href(action=>"blob",
3087                                                            hash_base=>$parents[$i],
3088                                                            hash=>$diffinfo->{'from_id'}[$i],
3089                                                            file_name=>$from->{'file'}[$i]);
3090                         } else {
3091                                 $from->{'href'}[$i] = undef;
3092                         }
3093                 }
3094         } else {
3095                 # ordinary (not combined) diff
3096                 $from->{'file'} = $diffinfo->{'from_file'};
3097                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3098                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3099                                                hash=>$diffinfo->{'from_id'},
3100                                                file_name=>$from->{'file'});
3101                 } else {
3102                         delete $from->{'href'};
3103                 }
3104         }
3105
3106         $to->{'file'} = $diffinfo->{'to_file'};
3107         if (!is_deleted($diffinfo)) { # file exists in result
3108                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3109                                      hash=>$diffinfo->{'to_id'},
3110                                      file_name=>$to->{'file'});
3111         } else {
3112                 delete $to->{'href'};
3113         }
3114 }
3115
3116 ## ......................................................................
3117 ## parse to array of hashes functions
3118
3119 sub git_get_heads_list {
3120         my $limit = shift;
3121         my @headslist;
3122
3123         open my $fd, '-|', git_cmd(), 'for-each-ref',
3124                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3125                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3126                 'refs/heads'
3127                 or return;
3128         while (my $line = <$fd>) {
3129                 my %ref_item;
3130
3131                 chomp $line;
3132                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3133                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3134                 my ($committer, $epoch, $tz) =
3135                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3136                 $ref_item{'fullname'}  = $name;
3137                 $name =~ s!^refs/heads/!!;
3138
3139                 $ref_item{'name'}  = $name;
3140                 $ref_item{'id'}    = $hash;
3141                 $ref_item{'title'} = $title || '(no commit message)';
3142                 $ref_item{'epoch'} = $epoch;
3143                 if ($epoch) {
3144                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3145                 } else {
3146                         $ref_item{'age'} = "unknown";
3147                 }
3148
3149                 push @headslist, \%ref_item;
3150         }
3151         close $fd;
3152
3153         return wantarray ? @headslist : \@headslist;
3154 }
3155
3156 sub git_get_tags_list {
3157         my $limit = shift;
3158         my @tagslist;
3159
3160         open my $fd, '-|', git_cmd(), 'for-each-ref',
3161                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3162                 '--format=%(objectname) %(objecttype) %(refname) '.
3163                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3164                 'refs/tags'
3165                 or return;
3166         while (my $line = <$fd>) {
3167                 my %ref_item;
3168
3169                 chomp $line;
3170                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3171                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3172                 my ($creator, $epoch, $tz) =
3173                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3174                 $ref_item{'fullname'} = $name;
3175                 $name =~ s!^refs/tags/!!;
3176
3177                 $ref_item{'type'} = $type;
3178                 $ref_item{'id'} = $id;
3179                 $ref_item{'name'} = $name;
3180                 if ($type eq "tag") {
3181                         $ref_item{'subject'} = $title;
3182                         $ref_item{'reftype'} = $reftype;
3183                         $ref_item{'refid'}   = $refid;
3184                 } else {
3185                         $ref_item{'reftype'} = $type;
3186                         $ref_item{'refid'}   = $id;
3187                 }
3188
3189                 if ($type eq "tag" || $type eq "commit") {
3190                         $ref_item{'epoch'} = $epoch;
3191                         if ($epoch) {
3192                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3193                         } else {
3194                                 $ref_item{'age'} = "unknown";
3195                         }
3196                 }
3197
3198                 push @tagslist, \%ref_item;
3199         }
3200         close $fd;
3201
3202         return wantarray ? @tagslist : \@tagslist;
3203 }
3204
3205 ## ----------------------------------------------------------------------
3206 ## filesystem-related functions
3207
3208 sub get_file_owner {
3209         my $path = shift;
3210
3211         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3212         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3213         if (!defined $gcos) {
3214                 return undef;
3215         }
3216         my $owner = $gcos;
3217         $owner =~ s/[,;].*$//;
3218         return to_utf8($owner);
3219 }
3220
3221 # assume that file exists
3222 sub insert_file {
3223         my $filename = shift;
3224
3225         open my $fd, '<', $filename;
3226         print map { to_utf8($_) } <$fd>;
3227         close $fd;
3228 }
3229
3230 ## ......................................................................
3231 ## mimetype related functions
3232
3233 sub mimetype_guess_file {
3234         my $filename = shift;
3235         my $mimemap = shift;
3236         -r $mimemap or return undef;
3237
3238         my %mimemap;
3239         open(my $mh, '<', $mimemap) or return undef;
3240         while (<$mh>) {
3241                 next if m/^#/; # skip comments
3242                 my ($mimetype, $exts) = split(/\t+/);
3243                 if (defined $exts) {
3244                         my @exts = split(/\s+/, $exts);
3245                         foreach my $ext (@exts) {
3246                                 $mimemap{$ext} = $mimetype;
3247                         }
3248                 }
3249         }
3250         close($mh);
3251
3252         $filename =~ /\.([^.]*)$/;
3253         return $mimemap{$1};
3254 }
3255
3256 sub mimetype_guess {
3257         my $filename = shift;
3258         my $mime;
3259         $filename =~ /\./ or return undef;
3260
3261         if ($mimetypes_file) {
3262                 my $file = $mimetypes_file;
3263                 if ($file !~ m!^/!) { # if it is relative path
3264                         # it is relative to project
3265                         $file = "$projectroot/$project/$file";
3266                 }
3267                 $mime = mimetype_guess_file($filename, $file);
3268         }
3269         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3270         return $mime;
3271 }
3272
3273 sub blob_mimetype {
3274         my $fd = shift;
3275         my $filename = shift;
3276
3277         if ($filename) {
3278                 my $mime = mimetype_guess($filename);
3279                 $mime and return $mime;
3280         }
3281
3282         # just in case
3283         return $default_blob_plain_mimetype unless $fd;
3284
3285         if (-T $fd) {
3286                 return 'text/plain';
3287         } elsif (! $filename) {
3288                 return 'application/octet-stream';
3289         } elsif ($filename =~ m/\.png$/i) {
3290                 return 'image/png';
3291         } elsif ($filename =~ m/\.gif$/i) {
3292                 return 'image/gif';
3293         } elsif ($filename =~ m/\.jpe?g$/i) {
3294                 return 'image/jpeg';
3295         } else {
3296                 return 'application/octet-stream';
3297         }
3298 }
3299
3300 sub blob_contenttype {
3301         my ($fd, $file_name, $type) = @_;
3302
3303         $type ||= blob_mimetype($fd, $file_name);
3304         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3305                 $type .= "; charset=$default_text_plain_charset";
3306         }
3307
3308         return $type;
3309 }
3310
3311 # guess file syntax for syntax highlighting; return undef if no highlighting
3312 # the name of syntax can (in the future) depend on syntax highlighter used
3313 sub guess_file_syntax {
3314         my ($highlight, $mimetype, $file_name) = @_;
3315         return undef unless ($highlight && defined $file_name);
3316
3317         # configuration for 'highlight' (http://www.andre-simon.de/)
3318         # match by basename
3319         my %highlight_basename = (
3320                 #'Program' => 'py',
3321                 #'Library' => 'py',
3322                 'SConstruct' => 'py', # SCons equivalent of Makefile
3323                 'Makefile' => 'make',
3324         );
3325         # match by extension
3326         my %highlight_ext = (
3327                 # main extensions, defining name of syntax;
3328                 # see files in /usr/share/highlight/langDefs/ directory
3329                 map { $_ => $_ }
3330                         qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
3331                 # alternate extensions, see /etc/highlight/filetypes.conf
3332                 'h' => 'c',
3333                 map { $_ => 'cpp' } qw(cxx c++ cc),
3334                 map { $_ => 'php' } qw(php3 php4),
3335                 map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
3336                 'mak' => 'make',
3337                 map { $_ => 'xml' } qw(xhtml html htm),
3338         );
3339
3340         my $basename = basename($file_name, '.in');
3341         return $highlight_basename{$basename}
3342                 if exists $highlight_basename{$basename};
3343
3344         $basename =~ /\.([^.]*)$/;
3345         my $ext = $1 or return undef;
3346         return $highlight_ext{$ext}
3347                 if exists $highlight_ext{$ext};
3348
3349         return undef;
3350 }
3351
3352 # run highlighter and return FD of its output,
3353 # or return original FD if no highlighting
3354 sub run_highlighter {
3355         my ($fd, $highlight, $syntax) = @_;
3356         return $fd unless ($highlight && defined $syntax);
3357
3358         close $fd
3359                 or die_error(404, "Reading blob failed");
3360         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3361                   "highlight --xhtml --fragment --syntax $syntax |"
3362                 or die_error(500, "Couldn't open file or run syntax highlighter");
3363         return $fd;
3364 }
3365
3366 ## ======================================================================
3367 ## functions printing HTML: header, footer, error page
3368
3369 sub get_page_title {
3370         my $title = to_utf8($site_name);
3371
3372         return $title unless (defined $project);
3373         $title .= " - " . to_utf8($project);
3374
3375         return $title unless (defined $action);
3376         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3377
3378         return $title unless (defined $file_name);
3379         $title .= " - " . esc_path($file_name);
3380         if ($action eq "tree" && $file_name !~ m|/$|) {
3381                 $title .= "/";
3382         }
3383
3384         return $title;
3385 }
3386
3387 sub git_header_html {
3388         my $status = shift || "200 OK";
3389         my $expires = shift;
3390         my %opts = @_;
3391
3392         my $title = get_page_title();
3393         my $content_type;
3394         # require explicit support from the UA if we are to send the page as
3395         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3396         # we have to do this because MSIE sometimes globs '*/*', pretending to
3397         # support xhtml+xml but choking when it gets what it asked for.
3398         if (defined $cgi->http('HTTP_ACCEPT') &&
3399             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3400             $cgi->Accept('application/xhtml+xml') != 0) {
3401                 $content_type = 'application/xhtml+xml';
3402         } else {
3403                 $content_type = 'text/html';
3404         }
3405         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3406                            -status=> $status, -expires => $expires)
3407                 unless ($opts{'-no_http_header'});
3408         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3409         print <<EOF;
3410 <?xml version="1.0" encoding="utf-8"?>
3411 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3412 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3413 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3414 <!-- git core binaries version $git_version -->
3415 <head>
3416 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3417 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3418 <meta name="robots" content="index, nofollow"/>
3419 <title>$title</title>
3420 EOF
3421         # the stylesheet, favicon etc urls won't work correctly with path_info
3422         # unless we set the appropriate base URL
3423         if ($ENV{'PATH_INFO'}) {
3424                 print "<base href=\"".esc_url($base_url)."\" />\n";
3425         }
3426         # print out each stylesheet that exist, providing backwards capability
3427         # for those people who defined $stylesheet in a config file
3428         if (defined $stylesheet) {
3429                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3430         } else {
3431                 foreach my $stylesheet (@stylesheets) {
3432                         next unless $stylesheet;
3433                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3434                 }
3435         }
3436         if (defined $project) {
3437                 my %href_params = get_feed_info();
3438                 if (!exists $href_params{'-title'}) {
3439                         $href_params{'-title'} = 'log';
3440                 }
3441
3442                 foreach my $format qw(RSS Atom) {
3443                         my $type = lc($format);
3444                         my %link_attr = (
3445                                 '-rel' => 'alternate',
3446                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3447                                 '-type' => "application/$type+xml"
3448                         );
3449
3450                         $href_params{'action'} = $type;
3451                         $link_attr{'-href'} = href(%href_params);
3452                         print "<link ".
3453                               "rel=\"$link_attr{'-rel'}\" ".
3454                               "title=\"$link_attr{'-title'}\" ".
3455                               "href=\"$link_attr{'-href'}\" ".
3456                               "type=\"$link_attr{'-type'}\" ".
3457                               "/>\n";
3458
3459                         $href_params{'extra_options'} = '--no-merges';
3460                         $link_attr{'-href'} = href(%href_params);
3461                         $link_attr{'-title'} .= ' (no merges)';
3462                         print "<link ".
3463                               "rel=\"$link_attr{'-rel'}\" ".
3464                               "title=\"$link_attr{'-title'}\" ".
3465                               "href=\"$link_attr{'-href'}\" ".
3466                               "type=\"$link_attr{'-type'}\" ".
3467                               "/>\n";
3468                 }
3469
3470         } else {
3471                 printf('<link rel="alternate" title="%s projects list" '.
3472                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3473                        $site_name, href(project=>undef, action=>"project_index"));
3474                 printf('<link rel="alternate" title="%s projects feeds" '.
3475                        'href="%s" type="text/x-opml" />'."\n",
3476                        $site_name, href(project=>undef, action=>"opml"));
3477         }
3478         if (defined $favicon) {
3479                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3480         }
3481
3482         print "</head>\n" .
3483               "<body>\n";
3484
3485         if (defined $site_header && -f $site_header) {
3486                 insert_file($site_header);
3487         }
3488
3489         print "<div class=\"page_header\">\n" .
3490               $cgi->a({-href => esc_url($logo_url),
3491                        -title => $logo_label},
3492                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3493         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3494         if (defined $project) {
3495                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3496                 if (defined $action) {
3497                         print " / $action";
3498                 }
3499                 print "\n";
3500         }
3501         print "</div>\n";
3502
3503         my $have_search = gitweb_check_feature('search');
3504         if (defined $project && $have_search) {
3505                 if (!defined $searchtext) {
3506                         $searchtext = "";
3507                 }
3508                 my $search_hash;
3509                 if (defined $hash_base) {
3510                         $search_hash = $hash_base;
3511                 } elsif (defined $hash) {
3512                         $search_hash = $hash;
3513                 } else {
3514                         $search_hash = "HEAD";
3515                 }
3516                 my $action = $my_uri;
3517                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3518                 if ($use_pathinfo) {
3519                         $action .= "/".esc_url($project);
3520                 }
3521                 print $cgi->startform(-method => "get", -action => $action) .
3522                       "<div class=\"search\">\n" .
3523                       (!$use_pathinfo &&
3524                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3525                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3526                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3527                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3528                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3529                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3530                       " search:\n",
3531                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3532                       "<span title=\"Extended regular expression\">" .
3533                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3534                                      -checked => $search_use_regexp) .
3535                       "</span>" .
3536                       "</div>" .
3537                       $cgi->end_form() . "\n";
3538         }
3539 }
3540
3541 sub git_footer_html {
3542         my $feed_class = 'rss_logo';
3543
3544         print "<div class=\"page_footer\">\n";
3545         if (defined $project) {
3546                 my $descr = git_get_project_description($project);
3547                 if (defined $descr) {
3548                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3549                 }
3550
3551                 my %href_params = get_feed_info();
3552                 if (!%href_params) {
3553                         $feed_class .= ' generic';
3554                 }
3555                 $href_params{'-title'} ||= 'log';
3556
3557                 foreach my $format qw(RSS Atom) {
3558                         $href_params{'action'} = lc($format);
3559                         print $cgi->a({-href => href(%href_params),
3560                                       -title => "$href_params{'-title'} $format feed",
3561                                       -class => $feed_class}, $format)."\n";
3562                 }
3563
3564         } else {
3565                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3566                               -class => $feed_class}, "OPML") . " ";
3567                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3568                               -class => $feed_class}, "TXT") . "\n";
3569         }
3570         print "</div>\n"; # class="page_footer"
3571
3572         if (defined $t0 && gitweb_check_feature('timed')) {
3573                 print "<div id=\"generating_info\">\n";
3574                 print 'This page took '.
3575                       '<span id="generating_time" class="time_span">'.
3576                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3577                       ' seconds </span>'.
3578                       ' and '.
3579                       '<span id="generating_cmd">'.
3580                       $number_of_git_cmds.
3581                       '</span> git commands '.
3582                       " to generate.\n";
3583                 print "</div>\n"; # class="page_footer"
3584         }
3585
3586         if (defined $site_footer && -f $site_footer) {
3587                 insert_file($site_footer);
3588         }
3589
3590         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3591         if (defined $action &&
3592             $action eq 'blame_incremental') {
3593                 print qq!<script type="text/javascript">\n!.
3594                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3595                       qq!           "!. href() .qq!");\n!.
3596                       qq!</script>\n!;
3597         } elsif (gitweb_check_feature('javascript-actions')) {
3598                 print qq!<script type="text/javascript">\n!.
3599                       qq!window.onload = fixLinks;\n!.
3600                       qq!</script>\n!;
3601         }
3602
3603         print "</body>\n" .
3604               "</html>";
3605 }
3606
3607 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3608 # Example: die_error(404, 'Hash not found')
3609 # By convention, use the following status codes (as defined in RFC 2616):
3610 # 400: Invalid or missing CGI parameters, or
3611 #      requested object exists but has wrong type.
3612 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3613 #      this server or project.
3614 # 404: Requested object/revision/project doesn't exist.
3615 # 500: The server isn't configured properly, or
3616 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3617 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3618 # 503: The server is currently unavailable (because it is overloaded,
3619 #      or down for maintenance).  Generally, this is a temporary state.
3620 sub die_error {
3621         my $status = shift || 500;
3622         my $error = esc_html(shift) || "Internal Server Error";
3623         my $extra = shift;
3624         my %opts = @_;
3625
3626         my %http_responses = (
3627                 400 => '400 Bad Request',
3628                 403 => '403 Forbidden',
3629                 404 => '404 Not Found',
3630                 500 => '500 Internal Server Error',
3631                 503 => '503 Service Unavailable',
3632         );
3633         git_header_html($http_responses{$status}, undef, %opts);
3634         print <<EOF;
3635 <div class="page_body">
3636 <br /><br />
3637 $status - $error
3638 <br />
3639 EOF
3640         if (defined $extra) {
3641                 print "<hr />\n" .
3642                       "$extra\n";
3643         }
3644         print "</div>\n";
3645
3646         git_footer_html();
3647         goto DONE_GITWEB
3648                 unless ($opts{'-error_handler'});
3649 }
3650
3651 ## ----------------------------------------------------------------------
3652 ## functions printing or outputting HTML: navigation
3653
3654 sub git_print_page_nav {
3655         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3656         $extra = '' if !defined $extra; # pager or formats
3657
3658         my @navs = qw(summary shortlog log commit commitdiff tree);
3659         if ($suppress) {
3660                 @navs = grep { $_ ne $suppress } @navs;
3661         }
3662
3663         my %arg = map { $_ => {action=>$_} } @navs;
3664         if (defined $head) {
3665                 for (qw(commit commitdiff)) {
3666                         $arg{$_}{'hash'} = $head;
3667                 }
3668                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3669                         for (qw(shortlog log)) {
3670                                 $arg{$_}{'hash'} = $head;
3671                         }
3672                 }
3673         }
3674
3675         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3676         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3677
3678         my @actions = gitweb_get_feature('actions');
3679         my %repl = (
3680                 '%' => '%',
3681                 'n' => $project,         # project name
3682                 'f' => $git_dir,         # project path within filesystem
3683                 'h' => $treehead || '',  # current hash ('h' parameter)
3684                 'b' => $treebase || '',  # hash base ('hb' parameter)
3685         );
3686         while (@actions) {
3687                 my ($label, $link, $pos) = splice(@actions,0,3);
3688                 # insert
3689                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3690                 # munch munch
3691                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3692                 $arg{$label}{'_href'} = $link;
3693         }
3694
3695         print "<div class=\"page_nav\">\n" .
3696                 (join " | ",
3697                  map { $_ eq $current ?
3698                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3699                  } @navs);
3700         print "<br/>\n$extra<br/>\n" .
3701               "</div>\n";
3702 }
3703
3704 sub format_paging_nav {
3705         my ($action, $page, $has_next_link) = @_;
3706         my $paging_nav;
3707
3708
3709         if ($page > 0) {
3710                 $paging_nav .=
3711                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3712                         " &sdot; " .
3713                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3714                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3715         } else {
3716                 $paging_nav .= "first &sdot; prev";
3717         }
3718
3719         if ($has_next_link) {
3720                 $paging_nav .= " &sdot; " .
3721                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3722                                  -accesskey => "n", -title => "Alt-n"}, "next");
3723         } else {
3724                 $paging_nav .= " &sdot; next";
3725         }
3726
3727         return $paging_nav;
3728 }
3729
3730 ## ......................................................................
3731 ## functions printing or outputting HTML: div
3732
3733 sub git_print_header_div {
3734         my ($action, $title, $hash, $hash_base) = @_;
3735         my %args = ();
3736
3737         $args{'action'} = $action;
3738         $args{'hash'} = $hash if $hash;
3739         $args{'hash_base'} = $hash_base if $hash_base;
3740
3741         print "<div class=\"header\">\n" .
3742               $cgi->a({-href => href(%args), -class => "title"},
3743               $title ? $title : $action) .
3744               "\n</div>\n";
3745 }
3746
3747 sub print_local_time {
3748         print format_local_time(@_);
3749 }
3750
3751 sub format_local_time {
3752         my $localtime = '';
3753         my %date = @_;
3754         if ($date{'hour_local'} < 6) {
3755                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3756                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3757         } else {
3758                 $localtime .= sprintf(" (%02d:%02d %s)",
3759                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3760         }
3761
3762         return $localtime;
3763 }
3764
3765 # Outputs the author name and date in long form
3766 sub git_print_authorship {
3767         my $co = shift;
3768         my %opts = @_;
3769         my $tag = $opts{-tag} || 'div';
3770         my $author = $co->{'author_name'};
3771
3772         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3773         print "<$tag class=\"author_date\">" .
3774               format_search_author($author, "author", esc_html($author)) .
3775               " [$ad{'rfc2822'}";
3776         print_local_time(%ad) if ($opts{-localtime});
3777         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3778                   . "</$tag>\n";
3779 }
3780
3781 # Outputs table rows containing the full author or committer information,
3782 # in the format expected for 'commit' view (& similia).
3783 # Parameters are a commit hash reference, followed by the list of people
3784 # to output information for. If the list is empty it defalts to both
3785 # author and committer.
3786 sub git_print_authorship_rows {
3787         my $co = shift;
3788         # too bad we can't use @people = @_ || ('author', 'committer')
3789         my @people = @_;
3790         @people = ('author', 'committer') unless @people;
3791         foreach my $who (@people) {
3792                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3793                 print "<tr><td>$who</td><td>" .
3794                       format_search_author($co->{"${who}_name"}, $who,
3795                                esc_html($co->{"${who}_name"})) . " " .
3796                       format_search_author($co->{"${who}_email"}, $who,
3797                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3798                       "</td><td rowspan=\"2\">" .
3799                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3800                       "</td></tr>\n" .
3801                       "<tr>" .
3802                       "<td></td><td> $wd{'rfc2822'}";
3803                 print_local_time(%wd);
3804                 print "</td>" .
3805                       "</tr>\n";
3806         }
3807 }
3808
3809 sub git_print_page_path {
3810         my $name = shift;
3811         my $type = shift;
3812         my $hb = shift;
3813
3814
3815         print "<div class=\"page_path\">";
3816         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3817                       -title => 'tree root'}, to_utf8("[$project]"));
3818         print " / ";
3819         if (defined $name) {
3820                 my @dirname = split '/', $name;
3821                 my $basename = pop @dirname;
3822                 my $fullname = '';
3823
3824                 foreach my $dir (@dirname) {
3825                         $fullname .= ($fullname ? '/' : '') . $dir;
3826                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3827                                                      hash_base=>$hb),
3828                                       -title => $fullname}, esc_path($dir));
3829                         print " / ";
3830                 }
3831                 if (defined $type && $type eq 'blob') {
3832                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3833                                                      hash_base=>$hb),
3834                                       -title => $name}, esc_path($basename));
3835                 } elsif (defined $type && $type eq 'tree') {
3836                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3837                                                      hash_base=>$hb),
3838                                       -title => $name}, esc_path($basename));
3839                         print " / ";
3840                 } else {
3841                         print esc_path($basename);
3842                 }
3843         }
3844         print "<br/></div>\n";
3845 }
3846
3847 sub git_print_log {
3848         my $log = shift;
3849         my %opts = @_;
3850
3851         if ($opts{'-remove_title'}) {
3852                 # remove title, i.e. first line of log
3853                 shift @$log;
3854         }
3855         # remove leading empty lines
3856         while (defined $log->[0] && $log->[0] eq "") {
3857                 shift @$log;
3858         }
3859
3860         # print log
3861         my $signoff = 0;
3862         my $empty = 0;
3863         foreach my $line (@$log) {
3864                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3865                         $signoff = 1;
3866                         $empty = 0;
3867                         if (! $opts{'-remove_signoff'}) {
3868                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3869                                 next;
3870                         } else {
3871                                 # remove signoff lines
3872                                 next;
3873                         }
3874                 } else {
3875                         $signoff = 0;
3876                 }
3877
3878                 # print only one empty line
3879                 # do not print empty line after signoff
3880                 if ($line eq "") {
3881                         next if ($empty || $signoff);
3882                         $empty = 1;
3883                 } else {
3884                         $empty = 0;
3885                 }
3886
3887                 print format_log_line_html($line) . "<br/>\n";
3888         }
3889
3890         if ($opts{'-final_empty_line'}) {
3891                 # end with single empty line
3892                 print "<br/>\n" unless $empty;
3893         }
3894 }
3895
3896 # return link target (what link points to)
3897 sub git_get_link_target {
3898         my $hash = shift;
3899         my $link_target;
3900
3901         # read link
3902         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3903                 or return;
3904         {
3905                 local $/ = undef;
3906                 $link_target = <$fd>;
3907         }
3908         close $fd
3909                 or return;
3910
3911         return $link_target;
3912 }
3913
3914 # given link target, and the directory (basedir) the link is in,
3915 # return target of link relative to top directory (top tree);
3916 # return undef if it is not possible (including absolute links).
3917 sub normalize_link_target {
3918         my ($link_target, $basedir) = @_;
3919
3920         # absolute symlinks (beginning with '/') cannot be normalized
3921         return if (substr($link_target, 0, 1) eq '/');
3922
3923         # normalize link target to path from top (root) tree (dir)
3924         my $path;
3925         if ($basedir) {
3926                 $path = $basedir . '/' . $link_target;
3927         } else {
3928                 # we are in top (root) tree (dir)
3929                 $path = $link_target;
3930         }
3931
3932         # remove //, /./, and /../
3933         my @path_parts;
3934         foreach my $part (split('/', $path)) {
3935                 # discard '.' and ''
3936                 next if (!$part || $part eq '.');
3937                 # handle '..'
3938                 if ($part eq '..') {
3939                         if (@path_parts) {
3940                                 pop @path_parts;
3941                         } else {
3942                                 # link leads outside repository (outside top dir)
3943                                 return;
3944                         }
3945                 } else {
3946                         push @path_parts, $part;
3947                 }
3948         }
3949         $path = join('/', @path_parts);
3950
3951         return $path;
3952 }
3953
3954 # print tree entry (row of git_tree), but without encompassing <tr> element
3955 sub git_print_tree_entry {
3956         my ($t, $basedir, $hash_base, $have_blame) = @_;
3957
3958         my %base_key = ();
3959         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3960
3961         # The format of a table row is: mode list link.  Where mode is
3962         # the mode of the entry, list is the name of the entry, an href,
3963         # and link is the action links of the entry.
3964
3965         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3966         if (exists $t->{'size'}) {
3967                 print "<td class=\"size\">$t->{'size'}</td>\n";
3968         }
3969         if ($t->{'type'} eq "blob") {
3970                 print "<td class=\"list\">" .
3971                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3972                                                file_name=>"$basedir$t->{'name'}", %base_key),
3973                                 -class => "list"}, esc_path($t->{'name'}));
3974                 if (S_ISLNK(oct $t->{'mode'})) {
3975                         my $link_target = git_get_link_target($t->{'hash'});
3976                         if ($link_target) {
3977                                 my $norm_target = normalize_link_target($link_target, $basedir);
3978                                 if (defined $norm_target) {
3979                                         print " -> " .
3980                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3981                                                                      file_name=>$norm_target),
3982                                                        -title => $norm_target}, esc_path($link_target));
3983                                 } else {
3984                                         print " -> " . esc_path($link_target);
3985                                 }
3986                         }
3987                 }
3988                 print "</td>\n";
3989                 print "<td class=\"link\">";
3990                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3991                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3992                               "blob");
3993                 if ($have_blame) {
3994                         print " | " .
3995                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3996                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3997                                       "blame");
3998                 }
3999                 if (defined $hash_base) {
4000                         print " | " .
4001                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4002                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4003                                       "history");
4004                 }
4005                 print " | " .
4006                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4007                                                file_name=>"$basedir$t->{'name'}")},
4008                                 "raw");
4009                 print "</td>\n";
4010
4011         } elsif ($t->{'type'} eq "tree") {
4012                 print "<td class=\"list\">";
4013                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4014                                              file_name=>"$basedir$t->{'name'}",
4015                                              %base_key)},
4016                               esc_path($t->{'name'}));
4017                 print "</td>\n";
4018                 print "<td class=\"link\">";
4019                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4020                                              file_name=>"$basedir$t->{'name'}",
4021                                              %base_key)},
4022                               "tree");
4023                 if (defined $hash_base) {
4024                         print " | " .
4025                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4026                                                      file_name=>"$basedir$t->{'name'}")},
4027                                       "history");
4028                 }
4029                 print "</td>\n";
4030         } else {
4031                 # unknown object: we can only present history for it
4032                 # (this includes 'commit' object, i.e. submodule support)
4033                 print "<td class=\"list\">" .
4034                       esc_path($t->{'name'}) .
4035                       "</td>\n";
4036                 print "<td class=\"link\">";
4037                 if (defined $hash_base) {
4038                         print $cgi->a({-href => href(action=>"history",
4039                                                      hash_base=>$hash_base,
4040                                                      file_name=>"$basedir$t->{'name'}")},
4041                                       "history");
4042                 }
4043                 print "</td>\n";
4044         }
4045 }
4046
4047 ## ......................................................................
4048 ## functions printing large fragments of HTML
4049
4050 # get pre-image filenames for merge (combined) diff
4051 sub fill_from_file_info {
4052         my ($diff, @parents) = @_;
4053
4054         $diff->{'from_file'} = [ ];
4055         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4056         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4057                 if ($diff->{'status'}[$i] eq 'R' ||
4058                     $diff->{'status'}[$i] eq 'C') {
4059                         $diff->{'from_file'}[$i] =
4060                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4061                 }
4062         }
4063
4064         return $diff;
4065 }
4066
4067 # is current raw difftree line of file deletion
4068 sub is_deleted {
4069         my $diffinfo = shift;
4070
4071         return $diffinfo->{'to_id'} eq ('0' x 40);
4072 }
4073
4074 # does patch correspond to [previous] difftree raw line
4075 # $diffinfo  - hashref of parsed raw diff format
4076 # $patchinfo - hashref of parsed patch diff format
4077 #              (the same keys as in $diffinfo)
4078 sub is_patch_split {
4079         my ($diffinfo, $patchinfo) = @_;
4080
4081         return defined $diffinfo && defined $patchinfo
4082                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4083 }
4084
4085
4086 sub git_difftree_body {
4087         my ($difftree, $hash, @parents) = @_;
4088         my ($parent) = $parents[0];
4089         my $have_blame = gitweb_check_feature('blame');
4090         print "<div class=\"list_head\">\n";
4091         if ($#{$difftree} > 10) {
4092                 print(($#{$difftree} + 1) . " files changed:\n");
4093         }
4094         print "</div>\n";
4095
4096         print "<table class=\"" .
4097               (@parents > 1 ? "combined " : "") .
4098               "diff_tree\">\n";
4099
4100         # header only for combined diff in 'commitdiff' view
4101         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4102         if ($has_header) {
4103                 # table header
4104                 print "<thead><tr>\n" .
4105                        "<th></th><th></th>\n"; # filename, patchN link
4106                 for (my $i = 0; $i < @parents; $i++) {
4107                         my $par = $parents[$i];
4108                         print "<th>" .
4109                               $cgi->a({-href => href(action=>"commitdiff",
4110                                                      hash=>$hash, hash_parent=>$par),
4111                                        -title => 'commitdiff to parent number ' .
4112                                                   ($i+1) . ': ' . substr($par,0,7)},
4113                                       $i+1) .
4114                               "&nbsp;</th>\n";
4115                 }
4116                 print "</tr></thead>\n<tbody>\n";
4117         }
4118
4119         my $alternate = 1;
4120         my $patchno = 0;
4121         foreach my $line (@{$difftree}) {
4122                 my $diff = parsed_difftree_line($line);
4123
4124                 if ($alternate) {
4125                         print "<tr class=\"dark\">\n";
4126                 } else {
4127                         print "<tr class=\"light\">\n";
4128                 }
4129                 $alternate ^= 1;
4130
4131                 if (exists $diff->{'nparents'}) { # combined diff
4132
4133                         fill_from_file_info($diff, @parents)
4134                                 unless exists $diff->{'from_file'};
4135
4136                         if (!is_deleted($diff)) {
4137                                 # file exists in the result (child) commit
4138                                 print "<td>" .
4139                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4140                                                              file_name=>$diff->{'to_file'},
4141                                                              hash_base=>$hash),
4142                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4143                                       "</td>\n";
4144                         } else {
4145                                 print "<td>" .
4146                                       esc_path($diff->{'to_file'}) .
4147                                       "</td>\n";
4148                         }
4149
4150                         if ($action eq 'commitdiff') {
4151                                 # link to patch
4152                                 $patchno++;
4153                                 print "<td class=\"link\">" .
4154                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4155                                       " | " .
4156                                       "</td>\n";
4157                         }
4158
4159                         my $has_history = 0;
4160                         my $not_deleted = 0;
4161                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4162                                 my $hash_parent = $parents[$i];
4163                                 my $from_hash = $diff->{'from_id'}[$i];
4164                                 my $from_path = $diff->{'from_file'}[$i];
4165                                 my $status = $diff->{'status'}[$i];
4166
4167                                 $has_history ||= ($status ne 'A');
4168                                 $not_deleted ||= ($status ne 'D');
4169
4170                                 if ($status eq 'A') {
4171                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4172                                 } elsif ($status eq 'D') {
4173                                         print "<td class=\"link\">" .
4174                                               $cgi->a({-href => href(action=>"blob",
4175                                                                      hash_base=>$hash,
4176                                                                      hash=>$from_hash,
4177                                                                      file_name=>$from_path)},
4178                                                       "blob" . ($i+1)) .
4179                                               " | </td>\n";
4180                                 } else {
4181                                         if ($diff->{'to_id'} eq $from_hash) {
4182                                                 print "<td class=\"link nochange\">";
4183                                         } else {
4184                                                 print "<td class=\"link\">";
4185                                         }
4186                                         print $cgi->a({-href => href(action=>"blobdiff",
4187                                                                      hash=>$diff->{'to_id'},
4188                                                                      hash_parent=>$from_hash,
4189                                                                      hash_base=>$hash,
4190                                                                      hash_parent_base=>$hash_parent,
4191                                                                      file_name=>$diff->{'to_file'},
4192                                                                      file_parent=>$from_path)},
4193                                                       "diff" . ($i+1)) .
4194                                               " | </td>\n";
4195                                 }
4196                         }
4197
4198                         print "<td class=\"link\">";
4199                         if ($not_deleted) {
4200                                 print $cgi->a({-href => href(action=>"blob",
4201                                                              hash=>$diff->{'to_id'},
4202                                                              file_name=>$diff->{'to_file'},
4203                                                              hash_base=>$hash)},
4204                                               "blob");
4205                                 print " | " if ($has_history);
4206                         }
4207                         if ($has_history) {
4208                                 print $cgi->a({-href => href(action=>"history",
4209                                                              file_name=>$diff->{'to_file'},
4210                                                              hash_base=>$hash)},
4211                                               "history");
4212                         }
4213                         print "</td>\n";
4214
4215                         print "</tr>\n";
4216                         next; # instead of 'else' clause, to avoid extra indent
4217                 }
4218                 # else ordinary diff
4219
4220                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4221                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4222                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4223                         $to_mode_oct = oct $diff->{'to_mode'};
4224                         if (S_ISREG($to_mode_oct)) { # only for regular file
4225                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4226                         }
4227                         $to_file_type = file_type($diff->{'to_mode'});
4228                 }
4229                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4230                         $from_mode_oct = oct $diff->{'from_mode'};
4231                         if (S_ISREG($to_mode_oct)) { # only for regular file
4232                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4233                         }
4234                         $from_file_type = file_type($diff->{'from_mode'});
4235                 }
4236
4237                 if ($diff->{'status'} eq "A") { # created
4238                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4239                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4240                         $mode_chng   .= "]</span>";
4241                         print "<td>";
4242                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4243                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4244                                       -class => "list"}, esc_path($diff->{'file'}));
4245                         print "</td>\n";
4246                         print "<td>$mode_chng</td>\n";
4247                         print "<td class=\"link\">";
4248                         if ($action eq 'commitdiff') {
4249                                 # link to patch
4250                                 $patchno++;
4251                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4252                                 print " | ";
4253                         }
4254                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4255                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4256                                       "blob");
4257                         print "</td>\n";
4258
4259                 } elsif ($diff->{'status'} eq "D") { # deleted
4260                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4261                         print "<td>";
4262                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4263                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4264                                        -class => "list"}, esc_path($diff->{'file'}));
4265                         print "</td>\n";
4266                         print "<td>$mode_chng</td>\n";
4267                         print "<td class=\"link\">";
4268                         if ($action eq 'commitdiff') {
4269                                 # link to patch
4270                                 $patchno++;
4271                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4272                                 print " | ";
4273                         }
4274                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4275                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4276                                       "blob") . " | ";
4277                         if ($have_blame) {
4278                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4279                                                              file_name=>$diff->{'file'})},
4280                                               "blame") . " | ";
4281                         }
4282                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4283                                                      file_name=>$diff->{'file'})},
4284                                       "history");
4285                         print "</td>\n";
4286
4287                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4288                         my $mode_chnge = "";
4289                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4290                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4291                                 if ($from_file_type ne $to_file_type) {
4292                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4293                                 }
4294                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4295                                         if ($from_mode_str && $to_mode_str) {
4296                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4297                                         } elsif ($to_mode_str) {
4298                                                 $mode_chnge .= " mode: $to_mode_str";
4299                                         }
4300                                 }
4301                                 $mode_chnge .= "]</span>\n";
4302                         }
4303                         print "<td>";
4304                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4305                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4306                                       -class => "list"}, esc_path($diff->{'file'}));
4307                         print "</td>\n";
4308                         print "<td>$mode_chnge</td>\n";
4309                         print "<td class=\"link\">";
4310                         if ($action eq 'commitdiff') {
4311                                 # link to patch
4312                                 $patchno++;
4313                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4314                                       " | ";
4315                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4316                                 # "commit" view and modified file (not onlu mode changed)
4317                                 print $cgi->a({-href => href(action=>"blobdiff",
4318                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4319                                                              hash_base=>$hash, hash_parent_base=>$parent,
4320                                                              file_name=>$diff->{'file'})},
4321                                               "diff") .
4322                                       " | ";
4323                         }
4324                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4325                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4326                                        "blob") . " | ";
4327                         if ($have_blame) {
4328                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4329                                                              file_name=>$diff->{'file'})},
4330                                               "blame") . " | ";
4331                         }
4332                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4333                                                      file_name=>$diff->{'file'})},
4334                                       "history");
4335                         print "</td>\n";
4336
4337                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4338                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4339                         my $nstatus = $status_name{$diff->{'status'}};
4340                         my $mode_chng = "";
4341                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4342                                 # mode also for directories, so we cannot use $to_mode_str
4343                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4344                         }
4345                         print "<td>" .
4346                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4347                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4348                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4349                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4350                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4351                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4352                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4353                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4354                               "<td class=\"link\">";
4355                         if ($action eq 'commitdiff') {
4356                                 # link to patch
4357                                 $patchno++;
4358                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4359                                       " | ";
4360                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4361                                 # "commit" view and modified file (not only pure rename or copy)
4362                                 print $cgi->a({-href => href(action=>"blobdiff",
4363                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4364                                                              hash_base=>$hash, hash_parent_base=>$parent,
4365                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4366                                               "diff") .
4367                                       " | ";
4368                         }
4369                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4370                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4371                                       "blob") . " | ";
4372                         if ($have_blame) {
4373                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4374                                                              file_name=>$diff->{'to_file'})},
4375                                               "blame") . " | ";
4376                         }
4377                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4378                                                     file_name=>$diff->{'to_file'})},
4379                                       "history");
4380                         print "</td>\n";
4381
4382                 } # we should not encounter Unmerged (U) or Unknown (X) status
4383                 print "</tr>\n";
4384         }
4385         print "</tbody>" if $has_header;
4386         print "</table>\n";
4387 }
4388
4389 sub git_patchset_body {
4390         my ($fd, $difftree, $hash, @hash_parents) = @_;
4391         my ($hash_parent) = $hash_parents[0];
4392
4393         my $is_combined = (@hash_parents > 1);
4394         my $patch_idx = 0;
4395         my $patch_number = 0;
4396         my $patch_line;
4397         my $diffinfo;
4398         my $to_name;
4399         my (%from, %to);
4400
4401         print "<div class=\"patchset\">\n";
4402
4403         # skip to first patch
4404         while ($patch_line = <$fd>) {
4405                 chomp $patch_line;
4406
4407                 last if ($patch_line =~ m/^diff /);
4408         }
4409
4410  PATCH:
4411         while ($patch_line) {
4412
4413                 # parse "git diff" header line
4414                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4415                         # $1 is from_name, which we do not use
4416                         $to_name = unquote($2);
4417                         $to_name =~ s!^b/!!;
4418                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4419                         # $1 is 'cc' or 'combined', which we do not use
4420                         $to_name = unquote($2);
4421                 } else {
4422                         $to_name = undef;
4423                 }
4424
4425                 # check if current patch belong to current raw line
4426                 # and parse raw git-diff line if needed
4427                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4428                         # this is continuation of a split patch
4429                         print "<div class=\"patch cont\">\n";
4430                 } else {
4431                         # advance raw git-diff output if needed
4432                         $patch_idx++ if defined $diffinfo;
4433
4434                         # read and prepare patch information
4435                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4436
4437                         # compact combined diff output can have some patches skipped
4438                         # find which patch (using pathname of result) we are at now;
4439                         if ($is_combined) {
4440                                 while ($to_name ne $diffinfo->{'to_file'}) {
4441                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4442                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4443                                               "</div>\n";  # class="patch"
4444
4445                                         $patch_idx++;
4446                                         $patch_number++;
4447
4448                                         last if $patch_idx > $#$difftree;
4449                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4450                                 }
4451                         }
4452
4453                         # modifies %from, %to hashes
4454                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4455
4456                         # this is first patch for raw difftree line with $patch_idx index
4457                         # we index @$difftree array from 0, but number patches from 1
4458                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4459                 }
4460
4461                 # git diff header
4462                 #assert($patch_line =~ m/^diff /) if DEBUG;
4463                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4464                 $patch_number++;
4465                 # print "git diff" header
4466                 print format_git_diff_header_line($patch_line, $diffinfo,
4467                                                   \%from, \%to);
4468
4469                 # print extended diff header
4470                 print "<div class=\"diff extended_header\">\n";
4471         EXTENDED_HEADER:
4472                 while ($patch_line = <$fd>) {
4473                         chomp $patch_line;
4474
4475                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4476
4477                         print format_extended_diff_header_line($patch_line, $diffinfo,
4478                                                                \%from, \%to);
4479                 }
4480                 print "</div>\n"; # class="diff extended_header"
4481
4482                 # from-file/to-file diff header
4483                 if (! $patch_line) {
4484                         print "</div>\n"; # class="patch"
4485                         last PATCH;
4486                 }
4487                 next PATCH if ($patch_line =~ m/^diff /);
4488                 #assert($patch_line =~ m/^---/) if DEBUG;
4489
4490                 my $last_patch_line = $patch_line;
4491                 $patch_line = <$fd>;
4492                 chomp $patch_line;
4493                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4494
4495                 print format_diff_from_to_header($last_patch_line, $patch_line,
4496                                                  $diffinfo, \%from, \%to,
4497                                                  @hash_parents);
4498
4499                 # the patch itself
4500         LINE:
4501                 while ($patch_line = <$fd>) {
4502                         chomp $patch_line;
4503
4504                         next PATCH if ($patch_line =~ m/^diff /);
4505
4506                         print format_diff_line($patch_line, \%from, \%to);
4507                 }
4508
4509         } continue {
4510                 print "</div>\n"; # class="patch"
4511         }
4512
4513         # for compact combined (--cc) format, with chunk and patch simpliciaction
4514         # patchset might be empty, but there might be unprocessed raw lines
4515         for (++$patch_idx if $patch_number > 0;
4516              $patch_idx < @$difftree;
4517              ++$patch_idx) {
4518                 # read and prepare patch information
4519                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4520
4521                 # generate anchor for "patch" links in difftree / whatchanged part
4522                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4523                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4524                       "</div>\n";  # class="patch"
4525
4526                 $patch_number++;
4527         }
4528
4529         if ($patch_number == 0) {
4530                 if (@hash_parents > 1) {
4531                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4532                 } else {
4533                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4534                 }
4535         }
4536
4537         print "</div>\n"; # class="patchset"
4538 }
4539
4540 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4541
4542 # fills project list info (age, description, owner, forks) for each
4543 # project in the list, removing invalid projects from returned list
4544 # NOTE: modifies $projlist, but does not remove entries from it
4545 sub fill_project_list_info {
4546         my ($projlist, $check_forks) = @_;
4547         my @projects;
4548
4549         my $show_ctags = gitweb_check_feature('ctags');
4550  PROJECT:
4551         foreach my $pr (@$projlist) {
4552                 my (@activity) = git_get_last_activity($pr->{'path'});
4553                 unless (@activity) {
4554                         next PROJECT;
4555                 }
4556                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4557                 if (!defined $pr->{'descr'}) {
4558                         my $descr = git_get_project_description($pr->{'path'}) || "";
4559                         $descr = to_utf8($descr);
4560                         $pr->{'descr_long'} = $descr;
4561                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4562                 }
4563                 if (!defined $pr->{'owner'}) {
4564                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4565                 }
4566                 if ($check_forks) {
4567                         my $pname = $pr->{'path'};
4568                         if (($pname =~ s/\.git$//) &&
4569                             ($pname !~ /\/$/) &&
4570                             (-d "$projectroot/$pname")) {
4571                                 $pr->{'forks'} = "-d $projectroot/$pname";
4572                         } else {
4573                                 $pr->{'forks'} = 0;
4574                         }
4575                 }
4576                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4577                 push @projects, $pr;
4578         }
4579
4580         return @projects;
4581 }
4582
4583 # print 'sort by' <th> element, generating 'sort by $name' replay link
4584 # if that order is not selected
4585 sub print_sort_th {
4586         print format_sort_th(@_);
4587 }
4588
4589 sub format_sort_th {
4590         my ($name, $order, $header) = @_;
4591         my $sort_th = "";
4592         $header ||= ucfirst($name);
4593
4594         if ($order eq $name) {
4595                 $sort_th .= "<th>$header</th>\n";
4596         } else {
4597                 $sort_th .= "<th>" .
4598                             $cgi->a({-href => href(-replay=>1, order=>$name),
4599                                      -class => "header"}, $header) .
4600                             "</th>\n";
4601         }
4602
4603         return $sort_th;
4604 }
4605
4606 sub git_project_list_body {
4607         # actually uses global variable $project
4608         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4609
4610         my $check_forks = gitweb_check_feature('forks');
4611         my @projects = fill_project_list_info($projlist, $check_forks);
4612
4613         $order ||= $default_projects_order;
4614         $from = 0 unless defined $from;
4615         $to = $#projects if (!defined $to || $#projects < $to);
4616
4617         my %order_info = (
4618                 project => { key => 'path', type => 'str' },
4619                 descr => { key => 'descr_long', type => 'str' },
4620                 owner => { key => 'owner', type => 'str' },
4621                 age => { key => 'age', type => 'num' }
4622         );
4623         my $oi = $order_info{$order};
4624         if ($oi->{'type'} eq 'str') {
4625                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4626         } else {
4627                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4628         }
4629
4630         my $show_ctags = gitweb_check_feature('ctags');
4631         if ($show_ctags) {
4632                 my %ctags;
4633                 foreach my $p (@projects) {
4634                         foreach my $ct (keys %{$p->{'ctags'}}) {
4635                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4636                         }
4637                 }
4638                 my $cloud = git_populate_project_tagcloud(\%ctags);
4639                 print git_show_project_tagcloud($cloud, 64);
4640         }
4641
4642         print "<table class=\"project_list\">\n";
4643         unless ($no_header) {
4644                 print "<tr>\n";
4645                 if ($check_forks) {
4646                         print "<th></th>\n";
4647                 }
4648                 print_sort_th('project', $order, 'Project');
4649                 print_sort_th('descr', $order, 'Description');
4650                 print_sort_th('owner', $order, 'Owner');
4651                 print_sort_th('age', $order, 'Last Change');
4652                 print "<th></th>\n" . # for links
4653                       "</tr>\n";
4654         }
4655         my $alternate = 1;
4656         my $tagfilter = $cgi->param('by_tag');
4657         for (my $i = $from; $i <= $to; $i++) {
4658                 my $pr = $projects[$i];
4659
4660                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4661                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4662                         and not $pr->{'descr_long'} =~ /$searchtext/;
4663                 # Weed out forks or non-matching entries of search
4664                 if ($check_forks) {
4665                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4666                         $forkbase="^$forkbase" if $forkbase;
4667                         next if not $searchtext and not $tagfilter and $show_ctags
4668                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4669                 }
4670
4671                 if ($alternate) {
4672                         print "<tr class=\"dark\">\n";
4673                 } else {
4674                         print "<tr class=\"light\">\n";
4675                 }
4676                 $alternate ^= 1;
4677                 if ($check_forks) {
4678                         print "<td>";
4679                         if ($pr->{'forks'}) {
4680                                 print "<!-- $pr->{'forks'} -->\n";
4681                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4682                         }
4683                         print "</td>\n";
4684                 }
4685                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4686                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4687                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4688                                         -class => "list", -title => $pr->{'descr_long'}},
4689                                         esc_html($pr->{'descr'})) . "</td>\n" .
4690                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4691                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4692                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4693                       "<td class=\"link\">" .
4694                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4695                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4696                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4697                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4698                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4699                       "</td>\n" .
4700                       "</tr>\n";
4701         }
4702         if (defined $extra) {
4703                 print "<tr>\n";
4704                 if ($check_forks) {
4705                         print "<td></td>\n";
4706                 }
4707                 print "<td colspan=\"5\">$extra</td>\n" .
4708                       "</tr>\n";
4709         }
4710         print "</table>\n";
4711 }
4712
4713 sub git_log_body {
4714         # uses global variable $project
4715         my ($commitlist, $from, $to, $refs, $extra) = @_;
4716
4717         $from = 0 unless defined $from;
4718         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4719
4720         for (my $i = 0; $i <= $to; $i++) {
4721                 my %co = %{$commitlist->[$i]};
4722                 next if !%co;
4723                 my $commit = $co{'id'};
4724                 my $ref = format_ref_marker($refs, $commit);
4725                 my %ad = parse_date($co{'author_epoch'});
4726                 git_print_header_div('commit',
4727                                "<span class=\"age\">$co{'age_string'}</span>" .
4728                                esc_html($co{'title'}) . $ref,
4729                                $commit);
4730                 print "<div class=\"title_text\">\n" .
4731                       "<div class=\"log_link\">\n" .
4732                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4733                       " | " .
4734                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4735                       " | " .
4736                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4737                       "<br/>\n" .
4738                       "</div>\n";
4739                       git_print_authorship(\%co, -tag => 'span');
4740                       print "<br/>\n</div>\n";
4741
4742                 print "<div class=\"log_body\">\n";
4743                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4744                 print "</div>\n";
4745         }
4746         if ($extra) {
4747                 print "<div class=\"page_nav\">\n";
4748                 print "$extra\n";
4749                 print "</div>\n";
4750         }
4751 }
4752
4753 sub git_shortlog_body {
4754         # uses global variable $project
4755         my ($commitlist, $from, $to, $refs, $extra) = @_;
4756
4757         $from = 0 unless defined $from;
4758         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4759
4760         print "<table class=\"shortlog\">\n";
4761         my $alternate = 1;
4762         for (my $i = $from; $i <= $to; $i++) {
4763                 my %co = %{$commitlist->[$i]};
4764                 my $commit = $co{'id'};
4765                 my $ref = format_ref_marker($refs, $commit);
4766                 if ($alternate) {
4767                         print "<tr class=\"dark\">\n";
4768                 } else {
4769                         print "<tr class=\"light\">\n";
4770                 }
4771                 $alternate ^= 1;
4772                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4773                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4774                       format_author_html('td', \%co, 10) . "<td>";
4775                 print format_subject_html($co{'title'}, $co{'title_short'},
4776                                           href(action=>"commit", hash=>$commit), $ref);
4777                 print "</td>\n" .
4778                       "<td class=\"link\">" .
4779                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4780                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4781                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4782                 my $snapshot_links = format_snapshot_links($commit);
4783                 if (defined $snapshot_links) {
4784                         print " | " . $snapshot_links;
4785                 }
4786                 print "</td>\n" .
4787                       "</tr>\n";
4788         }
4789         if (defined $extra) {
4790                 print "<tr>\n" .
4791                       "<td colspan=\"4\">$extra</td>\n" .
4792                       "</tr>\n";
4793         }
4794         print "</table>\n";
4795 }
4796
4797 sub git_history_body {
4798         # Warning: assumes constant type (blob or tree) during history
4799         my ($commitlist, $from, $to, $refs, $extra,
4800             $file_name, $file_hash, $ftype) = @_;
4801
4802         $from = 0 unless defined $from;
4803         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4804
4805         print "<table class=\"history\">\n";
4806         my $alternate = 1;
4807         for (my $i = $from; $i <= $to; $i++) {
4808                 my %co = %{$commitlist->[$i]};
4809                 if (!%co) {
4810                         next;
4811                 }
4812                 my $commit = $co{'id'};
4813
4814                 my $ref = format_ref_marker($refs, $commit);
4815
4816                 if ($alternate) {
4817                         print "<tr class=\"dark\">\n";
4818                 } else {
4819                         print "<tr class=\"light\">\n";
4820                 }
4821                 $alternate ^= 1;
4822                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4823         # shortlog:   format_author_html('td', \%co, 10)
4824                       format_author_html('td', \%co, 15, 3) . "<td>";
4825                 # originally git_history used chop_str($co{'title'}, 50)
4826                 print format_subject_html($co{'title'}, $co{'title_short'},
4827                                           href(action=>"commit", hash=>$commit), $ref);
4828                 print "</td>\n" .
4829                       "<td class=\"link\">" .
4830                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4831                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4832
4833                 if ($ftype eq 'blob') {
4834                         my $blob_current = $file_hash;
4835                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4836                         if (defined $blob_current && defined $blob_parent &&
4837                                         $blob_current ne $blob_parent) {
4838                                 print " | " .
4839                                         $cgi->a({-href => href(action=>"blobdiff",
4840                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4841                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4842                                                                file_name=>$file_name)},
4843                                                 "diff to current");
4844                         }
4845                 }
4846                 print "</td>\n" .
4847                       "</tr>\n";
4848         }
4849         if (defined $extra) {
4850                 print "<tr>\n" .
4851                       "<td colspan=\"4\">$extra</td>\n" .
4852                       "</tr>\n";
4853         }
4854         print "</table>\n";
4855 }
4856
4857 sub git_tags_body {
4858         # uses global variable $project
4859         my ($taglist, $from, $to, $extra) = @_;
4860         $from = 0 unless defined $from;
4861         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4862
4863         print "<table class=\"tags\">\n";
4864         my $alternate = 1;
4865         for (my $i = $from; $i <= $to; $i++) {
4866                 my $entry = $taglist->[$i];
4867                 my %tag = %$entry;
4868                 my $comment = $tag{'subject'};
4869                 my $comment_short;
4870                 if (defined $comment) {
4871                         $comment_short = chop_str($comment, 30, 5);
4872                 }
4873                 if ($alternate) {
4874                         print "<tr class=\"dark\">\n";
4875                 } else {
4876                         print "<tr class=\"light\">\n";
4877                 }
4878                 $alternate ^= 1;
4879                 if (defined $tag{'age'}) {
4880                         print "<td><i>$tag{'age'}</i></td>\n";
4881                 } else {
4882                         print "<td></td>\n";
4883                 }
4884                 print "<td>" .
4885                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4886                                -class => "list name"}, esc_html($tag{'name'})) .
4887                       "</td>\n" .
4888                       "<td>";
4889                 if (defined $comment) {
4890                         print format_subject_html($comment, $comment_short,
4891                                                   href(action=>"tag", hash=>$tag{'id'}));
4892                 }
4893                 print "</td>\n" .
4894                       "<td class=\"selflink\">";
4895                 if ($tag{'type'} eq "tag") {
4896                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4897                 } else {
4898                         print "&nbsp;";
4899                 }
4900                 print "</td>\n" .
4901                       "<td class=\"link\">" . " | " .
4902                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4903                 if ($tag{'reftype'} eq "commit") {
4904                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4905                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4906                 } elsif ($tag{'reftype'} eq "blob") {
4907                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4908                 }
4909                 print "</td>\n" .
4910                       "</tr>";
4911         }
4912         if (defined $extra) {
4913                 print "<tr>\n" .
4914                       "<td colspan=\"5\">$extra</td>\n" .
4915                       "</tr>\n";
4916         }
4917         print "</table>\n";
4918 }
4919
4920 sub git_heads_body {
4921         # uses global variable $project
4922         my ($headlist, $head, $from, $to, $extra) = @_;
4923         $from = 0 unless defined $from;
4924         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4925
4926         print "<table class=\"heads\">\n";
4927         my $alternate = 1;
4928         for (my $i = $from; $i <= $to; $i++) {
4929                 my $entry = $headlist->[$i];
4930                 my %ref = %$entry;
4931                 my $curr = $ref{'id'} eq $head;
4932                 if ($alternate) {
4933                         print "<tr class=\"dark\">\n";
4934                 } else {
4935                         print "<tr class=\"light\">\n";
4936                 }
4937                 $alternate ^= 1;
4938                 print "<td><i>$ref{'age'}</i></td>\n" .
4939                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4940                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4941                                -class => "list name"},esc_html($ref{'name'})) .
4942                       "</td>\n" .
4943                       "<td class=\"link\">" .
4944                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4945                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4946                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4947                       "</td>\n" .
4948                       "</tr>";
4949         }
4950         if (defined $extra) {
4951                 print "<tr>\n" .
4952                       "<td colspan=\"3\">$extra</td>\n" .
4953                       "</tr>\n";
4954         }
4955         print "</table>\n";
4956 }
4957
4958 sub git_search_grep_body {
4959         my ($commitlist, $from, $to, $extra) = @_;
4960         $from = 0 unless defined $from;
4961         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4962
4963         print "<table class=\"commit_search\">\n";
4964         my $alternate = 1;
4965         for (my $i = $from; $i <= $to; $i++) {
4966                 my %co = %{$commitlist->[$i]};
4967                 if (!%co) {
4968                         next;
4969                 }
4970                 my $commit = $co{'id'};
4971                 if ($alternate) {
4972                         print "<tr class=\"dark\">\n";
4973                 } else {
4974                         print "<tr class=\"light\">\n";
4975                 }
4976                 $alternate ^= 1;
4977                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4978                       format_author_html('td', \%co, 15, 5) .
4979                       "<td>" .
4980                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4981                                -class => "list subject"},
4982                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4983                 my $comment = $co{'comment'};
4984                 foreach my $line (@$comment) {
4985                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4986                                 my ($lead, $match, $trail) = ($1, $2, $3);
4987                                 $match = chop_str($match, 70, 5, 'center');
4988                                 my $contextlen = int((80 - length($match))/2);
4989                                 $contextlen = 30 if ($contextlen > 30);
4990                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4991                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4992
4993                                 $lead  = esc_html($lead);
4994                                 $match = esc_html($match);
4995                                 $trail = esc_html($trail);
4996
4997                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4998                         }
4999                 }
5000                 print "</td>\n" .
5001                       "<td class=\"link\">" .
5002                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5003                       " | " .
5004                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5005                       " | " .
5006                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5007                 print "</td>\n" .
5008                       "</tr>\n";
5009         }
5010         if (defined $extra) {
5011                 print "<tr>\n" .
5012                       "<td colspan=\"3\">$extra</td>\n" .
5013                       "</tr>\n";
5014         }
5015         print "</table>\n";
5016 }
5017
5018 ## ======================================================================
5019 ## ======================================================================
5020 ## actions
5021
5022 sub git_project_list {
5023         my $order = $input_params{'order'};
5024         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5025                 die_error(400, "Unknown order parameter");
5026         }
5027
5028         my @list = git_get_projects_list();
5029         if (!@list) {
5030                 die_error(404, "No projects found");
5031         }
5032
5033         git_header_html();
5034         if (defined $home_text && -f $home_text) {
5035                 print "<div class=\"index_include\">\n";
5036                 insert_file($home_text);
5037                 print "</div>\n";
5038         }
5039         print $cgi->startform(-method => "get") .
5040               "<p class=\"projsearch\">Search:\n" .
5041               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5042               "</p>" .
5043               $cgi->end_form() . "\n";
5044         git_project_list_body(\@list, $order);
5045         git_footer_html();
5046 }
5047
5048 sub git_forks {
5049         my $order = $input_params{'order'};
5050         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5051                 die_error(400, "Unknown order parameter");
5052         }
5053
5054         my @list = git_get_projects_list($project);
5055         if (!@list) {
5056                 die_error(404, "No forks found");
5057         }
5058
5059         git_header_html();
5060         git_print_page_nav('','');
5061         git_print_header_div('summary', "$project forks");
5062         git_project_list_body(\@list, $order);
5063         git_footer_html();
5064 }
5065
5066 sub git_project_index {
5067         my @projects = git_get_projects_list($project);
5068
5069         print $cgi->header(
5070                 -type => 'text/plain',
5071                 -charset => 'utf-8',
5072                 -content_disposition => 'inline; filename="index.aux"');
5073
5074         foreach my $pr (@projects) {
5075                 if (!exists $pr->{'owner'}) {
5076                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5077                 }
5078
5079                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5080                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5081                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5082                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5083                 $path  =~ s/ /\+/g;
5084                 $owner =~ s/ /\+/g;
5085
5086                 print "$path $owner\n";
5087         }
5088 }
5089
5090 sub git_summary {
5091         my $descr = git_get_project_description($project) || "none";
5092         my %co = parse_commit("HEAD");
5093         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5094         my $head = $co{'id'};
5095
5096         my $owner = git_get_project_owner($project);
5097
5098         my $refs = git_get_references();
5099         # These get_*_list functions return one more to allow us to see if
5100         # there are more ...
5101         my @taglist  = git_get_tags_list(16);
5102         my @headlist = git_get_heads_list(16);
5103         my @forklist;
5104         my $check_forks = gitweb_check_feature('forks');
5105
5106         if ($check_forks) {
5107                 @forklist = git_get_projects_list($project);
5108         }
5109
5110         git_header_html();
5111         git_print_page_nav('summary','', $head);
5112
5113         print "<div class=\"title\">&nbsp;</div>\n";
5114         print "<table class=\"projects_list\">\n" .
5115               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5116               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5117         if (defined $cd{'rfc2822'}) {
5118                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5119         }
5120
5121         # use per project git URL list in $projectroot/$project/cloneurl
5122         # or make project git URL from git base URL and project name
5123         my $url_tag = "URL";
5124         my @url_list = git_get_project_url_list($project);
5125         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5126         foreach my $git_url (@url_list) {
5127                 next unless $git_url;
5128                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5129                 $url_tag = "";
5130         }
5131
5132         # Tag cloud
5133         my $show_ctags = gitweb_check_feature('ctags');
5134         if ($show_ctags) {
5135                 my $ctags = git_get_project_ctags($project);
5136                 my $cloud = git_populate_project_tagcloud($ctags);
5137                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5138                 print "</td>\n<td>" unless %$ctags;
5139                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5140                 print "</td>\n<td>" if %$ctags;
5141                 print git_show_project_tagcloud($cloud, 48);
5142                 print "</td></tr>";
5143         }
5144
5145         print "</table>\n";
5146
5147         # If XSS prevention is on, we don't include README.html.
5148         # TODO: Allow a readme in some safe format.
5149         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5150                 print "<div class=\"title\">readme</div>\n" .
5151                       "<div class=\"readme\">\n";
5152                 insert_file("$projectroot/$project/README.html");
5153                 print "\n</div>\n"; # class="readme"
5154         }
5155
5156         # we need to request one more than 16 (0..15) to check if
5157         # those 16 are all
5158         my @commitlist = $head ? parse_commits($head, 17) : ();
5159         if (@commitlist) {
5160                 git_print_header_div('shortlog');
5161                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5162                                   $#commitlist <=  15 ? undef :
5163                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5164         }
5165
5166         if (@taglist) {
5167                 git_print_header_div('tags');
5168                 git_tags_body(\@taglist, 0, 15,
5169                               $#taglist <=  15 ? undef :
5170                               $cgi->a({-href => href(action=>"tags")}, "..."));
5171         }
5172
5173         if (@headlist) {
5174                 git_print_header_div('heads');
5175                 git_heads_body(\@headlist, $head, 0, 15,
5176                                $#headlist <= 15 ? undef :
5177                                $cgi->a({-href => href(action=>"heads")}, "..."));
5178         }
5179
5180         if (@forklist) {
5181                 git_print_header_div('forks');
5182                 git_project_list_body(\@forklist, 'age', 0, 15,
5183                                       $#forklist <= 15 ? undef :
5184                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5185                                       'no_header');
5186         }
5187
5188         git_footer_html();
5189 }
5190
5191 sub git_tag {
5192         my $head = git_get_head_hash($project);
5193         git_header_html();
5194         git_print_page_nav('','', $head,undef,$head);
5195         my %tag = parse_tag($hash);
5196
5197         if (! %tag) {
5198                 die_error(404, "Unknown tag object");
5199         }
5200
5201         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5202         print "<div class=\"title_text\">\n" .
5203               "<table class=\"object_header\">\n" .
5204               "<tr>\n" .
5205               "<td>object</td>\n" .
5206               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5207                                $tag{'object'}) . "</td>\n" .
5208               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5209                                               $tag{'type'}) . "</td>\n" .
5210               "</tr>\n";
5211         if (defined($tag{'author'})) {
5212                 git_print_authorship_rows(\%tag, 'author');
5213         }
5214         print "</table>\n\n" .
5215               "</div>\n";
5216         print "<div class=\"page_body\">";
5217         my $comment = $tag{'comment'};
5218         foreach my $line (@$comment) {
5219                 chomp $line;
5220                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5221         }
5222         print "</div>\n";
5223         git_footer_html();
5224 }
5225
5226 sub git_blame_common {
5227         my $format = shift || 'porcelain';
5228         if ($format eq 'porcelain' && $cgi->param('js')) {
5229                 $format = 'incremental';
5230                 $action = 'blame_incremental'; # for page title etc
5231         }
5232
5233         # permissions
5234         gitweb_check_feature('blame')
5235                 or die_error(403, "Blame view not allowed");
5236
5237         # error checking
5238         die_error(400, "No file name given") unless $file_name;
5239         $hash_base ||= git_get_head_hash($project);
5240         die_error(404, "Couldn't find base commit") unless $hash_base;
5241         my %co = parse_commit($hash_base)
5242                 or die_error(404, "Commit not found");
5243         my $ftype = "blob";
5244         if (!defined $hash) {
5245                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5246                         or die_error(404, "Error looking up file");
5247         } else {
5248                 $ftype = git_get_type($hash);
5249                 if ($ftype !~ "blob") {
5250                         die_error(400, "Object is not a blob");
5251                 }
5252         }
5253
5254         my $fd;
5255         if ($format eq 'incremental') {
5256                 # get file contents (as base)
5257                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5258                         or die_error(500, "Open git-cat-file failed");
5259         } elsif ($format eq 'data') {
5260                 # run git-blame --incremental
5261                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5262                         $hash_base, "--", $file_name
5263                         or die_error(500, "Open git-blame --incremental failed");
5264         } else {
5265                 # run git-blame --porcelain
5266                 open $fd, "-|", git_cmd(), "blame", '-p',
5267                         $hash_base, '--', $file_name
5268                         or die_error(500, "Open git-blame --porcelain failed");
5269         }
5270
5271         # incremental blame data returns early
5272         if ($format eq 'data') {
5273                 print $cgi->header(
5274                         -type=>"text/plain", -charset => "utf-8",
5275                         -status=> "200 OK");
5276                 local $| = 1; # output autoflush
5277                 print while <$fd>;
5278                 close $fd
5279                         or print "ERROR $!\n";
5280
5281                 print 'END';
5282                 if (defined $t0 && gitweb_check_feature('timed')) {
5283                         print ' '.
5284                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5285                               ' '.$number_of_git_cmds;
5286                 }
5287                 print "\n";
5288
5289                 return;
5290         }
5291
5292         # page header
5293         git_header_html();
5294         my $formats_nav =
5295                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5296                         "blob") .
5297                 " | ";
5298         if ($format eq 'incremental') {
5299                 $formats_nav .=
5300                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5301                                 "blame") . " (non-incremental)";
5302         } else {
5303                 $formats_nav .=
5304                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5305                                 "blame") . " (incremental)";
5306         }
5307         $formats_nav .=
5308                 " | " .
5309                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5310                         "history") .
5311                 " | " .
5312                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5313                         "HEAD");
5314         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5315         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5316         git_print_page_path($file_name, $ftype, $hash_base);
5317
5318         # page body
5319         if ($format eq 'incremental') {
5320                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5321                       "This page requires JavaScript to run.\n Use ".
5322                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5323                               'this page').
5324                       " instead.\n".
5325                       "</b></center></div>\n</noscript>\n";
5326
5327                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5328         }
5329
5330         print qq!<div class="page_body">\n!;
5331         print qq!<div id="progress_info">... / ...</div>\n!
5332                 if ($format eq 'incremental');
5333         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5334               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5335               qq!<thead>\n!.
5336               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5337               qq!</thead>\n!.
5338               qq!<tbody>\n!;
5339
5340         my @rev_color = qw(light dark);
5341         my $num_colors = scalar(@rev_color);
5342         my $current_color = 0;
5343
5344         if ($format eq 'incremental') {
5345                 my $color_class = $rev_color[$current_color];
5346
5347                 #contents of a file
5348                 my $linenr = 0;
5349         LINE:
5350                 while (my $line = <$fd>) {
5351                         chomp $line;
5352                         $linenr++;
5353
5354                         print qq!<tr id="l$linenr" class="$color_class">!.
5355                               qq!<td class="sha1"><a href=""> </a></td>!.
5356                               qq!<td class="linenr">!.
5357                               qq!<a class="linenr" href="">$linenr</a></td>!;
5358                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5359                         print qq!</tr>\n!;
5360                 }
5361
5362         } else { # porcelain, i.e. ordinary blame
5363                 my %metainfo = (); # saves information about commits
5364
5365                 # blame data
5366         LINE:
5367                 while (my $line = <$fd>) {
5368                         chomp $line;
5369                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5370                         # no <lines in group> for subsequent lines in group of lines
5371                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5372                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5373                         if (!exists $metainfo{$full_rev}) {
5374                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5375                         }
5376                         my $meta = $metainfo{$full_rev};
5377                         my $data;
5378                         while ($data = <$fd>) {
5379                                 chomp $data;
5380                                 last if ($data =~ s/^\t//); # contents of line
5381                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5382                                         $meta->{$1} = $2 unless exists $meta->{$1};
5383                                 }
5384                                 if ($data =~ /^previous /) {
5385                                         $meta->{'nprevious'}++;
5386                                 }
5387                         }
5388                         my $short_rev = substr($full_rev, 0, 8);
5389                         my $author = $meta->{'author'};
5390                         my %date =
5391                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5392                         my $date = $date{'iso-tz'};
5393                         if ($group_size) {
5394                                 $current_color = ($current_color + 1) % $num_colors;
5395                         }
5396                         my $tr_class = $rev_color[$current_color];
5397                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5398                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5399                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5400                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5401                         if ($group_size) {
5402                                 print "<td class=\"sha1\"";
5403                                 print " title=\"". esc_html($author) . ", $date\"";
5404                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5405                                 print ">";
5406                                 print $cgi->a({-href => href(action=>"commit",
5407                                                              hash=>$full_rev,
5408                                                              file_name=>$file_name)},
5409                                               esc_html($short_rev));
5410                                 if ($group_size >= 2) {
5411                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5412                                         if (@author_initials) {
5413                                                 print "<br />" .
5414                                                       esc_html(join('', @author_initials));
5415                                                 #           or join('.', ...)
5416                                         }
5417                                 }
5418                                 print "</td>\n";
5419                         }
5420                         # 'previous' <sha1 of parent commit> <filename at commit>
5421                         if (exists $meta->{'previous'} &&
5422                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5423                                 $meta->{'parent'} = $1;
5424                                 $meta->{'file_parent'} = unquote($2);
5425                         }
5426                         my $linenr_commit =
5427                                 exists($meta->{'parent'}) ?
5428                                 $meta->{'parent'} : $full_rev;
5429                         my $linenr_filename =
5430                                 exists($meta->{'file_parent'}) ?
5431                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5432                         my $blamed = href(action => 'blame',
5433                                           file_name => $linenr_filename,
5434                                           hash_base => $linenr_commit);
5435                         print "<td class=\"linenr\">";
5436                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5437                                         -class => "linenr" },
5438                                       esc_html($lineno));
5439                         print "</td>";
5440                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5441                         print "</tr>\n";
5442                 } # end while
5443
5444         }
5445
5446         # footer
5447         print "</tbody>\n".
5448               "</table>\n"; # class="blame"
5449         print "</div>\n";   # class="blame_body"
5450         close $fd
5451                 or print "Reading blob failed\n";
5452
5453         git_footer_html();
5454 }
5455
5456 sub git_blame {
5457         git_blame_common();
5458 }
5459
5460 sub git_blame_incremental {
5461         git_blame_common('incremental');
5462 }
5463
5464 sub git_blame_data {
5465         git_blame_common('data');
5466 }
5467
5468 sub git_tags {
5469         my $head = git_get_head_hash($project);
5470         git_header_html();
5471         git_print_page_nav('','', $head,undef,$head);
5472         git_print_header_div('summary', $project);
5473
5474         my @tagslist = git_get_tags_list();
5475         if (@tagslist) {
5476                 git_tags_body(\@tagslist);
5477         }
5478         git_footer_html();
5479 }
5480
5481 sub git_heads {
5482         my $head = git_get_head_hash($project);
5483         git_header_html();
5484         git_print_page_nav('','', $head,undef,$head);
5485         git_print_header_div('summary', $project);
5486
5487         my @headslist = git_get_heads_list();
5488         if (@headslist) {
5489                 git_heads_body(\@headslist, $head);
5490         }
5491         git_footer_html();
5492 }
5493
5494 sub git_blob_plain {
5495         my $type = shift;
5496         my $expires;
5497
5498         if (!defined $hash) {
5499                 if (defined $file_name) {
5500                         my $base = $hash_base || git_get_head_hash($project);
5501                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5502                                 or die_error(404, "Cannot find file");
5503                 } else {
5504                         die_error(400, "No file name defined");
5505                 }
5506         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5507                 # blobs defined by non-textual hash id's can be cached
5508                 $expires = "+1d";
5509         }
5510
5511         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5512                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5513
5514         # content-type (can include charset)
5515         $type = blob_contenttype($fd, $file_name, $type);
5516
5517         # "save as" filename, even when no $file_name is given
5518         my $save_as = "$hash";
5519         if (defined $file_name) {
5520                 $save_as = $file_name;
5521         } elsif ($type =~ m/^text\//) {
5522                 $save_as .= '.txt';
5523         }
5524
5525         # With XSS prevention on, blobs of all types except a few known safe
5526         # ones are served with "Content-Disposition: attachment" to make sure
5527         # they don't run in our security domain.  For certain image types,
5528         # blob view writes an <img> tag referring to blob_plain view, and we
5529         # want to be sure not to break that by serving the image as an
5530         # attachment (though Firefox 3 doesn't seem to care).
5531         my $sandbox = $prevent_xss &&
5532                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5533
5534         print $cgi->header(
5535                 -type => $type,
5536                 -expires => $expires,
5537                 -content_disposition =>
5538                         ($sandbox ? 'attachment' : 'inline')
5539                         . '; filename="' . $save_as . '"');
5540         local $/ = undef;
5541         binmode STDOUT, ':raw';
5542         print <$fd>;
5543         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5544         close $fd;
5545 }
5546
5547 sub git_blob {
5548         my $expires;
5549
5550         if (!defined $hash) {
5551                 if (defined $file_name) {
5552                         my $base = $hash_base || git_get_head_hash($project);
5553                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5554                                 or die_error(404, "Cannot find file");
5555                 } else {
5556                         die_error(400, "No file name defined");
5557                 }
5558         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5559                 # blobs defined by non-textual hash id's can be cached
5560                 $expires = "+1d";
5561         }
5562
5563         my $have_blame = gitweb_check_feature('blame');
5564         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5565                 or die_error(500, "Couldn't cat $file_name, $hash");
5566         my $mimetype = blob_mimetype($fd, $file_name);
5567         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5568         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5569                 close $fd;
5570                 return git_blob_plain($mimetype);
5571         }
5572         # we can have blame only for text/* mimetype
5573         $have_blame &&= ($mimetype =~ m!^text/!);
5574
5575         my $highlight = gitweb_check_feature('highlight');
5576         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5577         $fd = run_highlighter($fd, $highlight, $syntax)
5578                 if $syntax;
5579
5580         git_header_html(undef, $expires);
5581         my $formats_nav = '';
5582         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5583                 if (defined $file_name) {
5584                         if ($have_blame) {
5585                                 $formats_nav .=
5586                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5587                                                 "blame") .
5588                                         " | ";
5589                         }
5590                         $formats_nav .=
5591                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5592                                         "history") .
5593                                 " | " .
5594                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5595                                         "raw") .
5596                                 " | " .
5597                                 $cgi->a({-href => href(action=>"blob",
5598                                                        hash_base=>"HEAD", file_name=>$file_name)},
5599                                         "HEAD");
5600                 } else {
5601                         $formats_nav .=
5602                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5603                                         "raw");
5604                 }
5605                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5606                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5607         } else {
5608                 print "<div class=\"page_nav\">\n" .
5609                       "<br/><br/></div>\n" .
5610                       "<div class=\"title\">$hash</div>\n";
5611         }
5612         git_print_page_path($file_name, "blob", $hash_base);
5613         print "<div class=\"page_body\">\n";
5614         if ($mimetype =~ m!^image/!) {
5615                 print qq!<img type="$mimetype"!;
5616                 if ($file_name) {
5617                         print qq! alt="$file_name" title="$file_name"!;
5618                 }
5619                 print qq! src="! .
5620                       href(action=>"blob_plain", hash=>$hash,
5621                            hash_base=>$hash_base, file_name=>$file_name) .
5622                       qq!" />\n!;
5623         } else {
5624                 my $nr;
5625                 while (my $line = <$fd>) {
5626                         chomp $line;
5627                         $nr++;
5628                         $line = untabify($line);
5629                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5630                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5631                 }
5632         }
5633         close $fd
5634                 or print "Reading blob failed.\n";
5635         print "</div>";
5636         git_footer_html();
5637 }
5638
5639 sub git_tree {
5640         if (!defined $hash_base) {
5641                 $hash_base = "HEAD";
5642         }
5643         if (!defined $hash) {
5644                 if (defined $file_name) {
5645                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5646                 } else {
5647                         $hash = $hash_base;
5648                 }
5649         }
5650         die_error(404, "No such tree") unless defined($hash);
5651
5652         my $show_sizes = gitweb_check_feature('show-sizes');
5653         my $have_blame = gitweb_check_feature('blame');
5654
5655         my @entries = ();
5656         {
5657                 local $/ = "\0";
5658                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5659                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5660                         or die_error(500, "Open git-ls-tree failed");
5661                 @entries = map { chomp; $_ } <$fd>;
5662                 close $fd
5663                         or die_error(404, "Reading tree failed");
5664         }
5665
5666         my $refs = git_get_references();
5667         my $ref = format_ref_marker($refs, $hash_base);
5668         git_header_html();
5669         my $basedir = '';
5670         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5671                 my @views_nav = ();
5672                 if (defined $file_name) {
5673                         push @views_nav,
5674                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5675                                         "history"),
5676                                 $cgi->a({-href => href(action=>"tree",
5677                                                        hash_base=>"HEAD", file_name=>$file_name)},
5678                                         "HEAD"),
5679                 }
5680                 my $snapshot_links = format_snapshot_links($hash);
5681                 if (defined $snapshot_links) {
5682                         # FIXME: Should be available when we have no hash base as well.
5683                         push @views_nav, $snapshot_links;
5684                 }
5685                 git_print_page_nav('tree','', $hash_base, undef, undef,
5686                                    join(' | ', @views_nav));
5687                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5688         } else {
5689                 undef $hash_base;
5690                 print "<div class=\"page_nav\">\n";
5691                 print "<br/><br/></div>\n";
5692                 print "<div class=\"title\">$hash</div>\n";
5693         }
5694         if (defined $file_name) {
5695                 $basedir = $file_name;
5696                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5697                         $basedir .= '/';
5698                 }
5699                 git_print_page_path($file_name, 'tree', $hash_base);
5700         }
5701         print "<div class=\"page_body\">\n";
5702         print "<table class=\"tree\">\n";
5703         my $alternate = 1;
5704         # '..' (top directory) link if possible
5705         if (defined $hash_base &&
5706             defined $file_name && $file_name =~ m![^/]+$!) {
5707                 if ($alternate) {
5708                         print "<tr class=\"dark\">\n";
5709                 } else {
5710                         print "<tr class=\"light\">\n";
5711                 }
5712                 $alternate ^= 1;
5713
5714                 my $up = $file_name;
5715                 $up =~ s!/?[^/]+$!!;
5716                 undef $up unless $up;
5717                 # based on git_print_tree_entry
5718                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5719                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5720                 print '<td class="list">';
5721                 print $cgi->a({-href => href(action=>"tree",
5722                                              hash_base=>$hash_base,
5723                                              file_name=>$up)},
5724                               "..");
5725                 print "</td>\n";
5726                 print "<td class=\"link\"></td>\n";
5727
5728                 print "</tr>\n";
5729         }
5730         foreach my $line (@entries) {
5731                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5732
5733                 if ($alternate) {
5734                         print "<tr class=\"dark\">\n";
5735                 } else {
5736                         print "<tr class=\"light\">\n";
5737                 }
5738                 $alternate ^= 1;
5739
5740                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5741
5742                 print "</tr>\n";
5743         }
5744         print "</table>\n" .
5745               "</div>";
5746         git_footer_html();
5747 }
5748
5749 sub snapshot_name {
5750         my ($project, $hash) = @_;
5751
5752         # path/to/project.git  -> project
5753         # path/to/project/.git -> project
5754         my $name = to_utf8($project);
5755         $name =~ s,([^/])/*\.git$,$1,;
5756         $name = basename($name);
5757         # sanitize name
5758         $name =~ s/[[:cntrl:]]/?/g;
5759
5760         my $ver = $hash;
5761         if ($hash =~ /^[0-9a-fA-F]+$/) {
5762                 # shorten SHA-1 hash
5763                 my $full_hash = git_get_full_hash($project, $hash);
5764                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5765                         $ver = git_get_short_hash($project, $hash);
5766                 }
5767         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5768                 # tags don't need shortened SHA-1 hash
5769                 $ver = $1;
5770         } else {
5771                 # branches and other need shortened SHA-1 hash
5772                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5773                         $ver = $1;
5774                 }
5775                 $ver .= '-' . git_get_short_hash($project, $hash);
5776         }
5777         # in case of hierarchical branch names
5778         $ver =~ s!/!.!g;
5779
5780         # name = project-version_string
5781         $name = "$name-$ver";
5782
5783         return wantarray ? ($name, $name) : $name;
5784 }
5785
5786 sub git_snapshot {
5787         my $format = $input_params{'snapshot_format'};
5788         if (!@snapshot_fmts) {
5789                 die_error(403, "Snapshots not allowed");
5790         }
5791         # default to first supported snapshot format
5792         $format ||= $snapshot_fmts[0];
5793         if ($format !~ m/^[a-z0-9]+$/) {
5794                 die_error(400, "Invalid snapshot format parameter");
5795         } elsif (!exists($known_snapshot_formats{$format})) {
5796                 die_error(400, "Unknown snapshot format");
5797         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5798                 die_error(403, "Snapshot format not allowed");
5799         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5800                 die_error(403, "Unsupported snapshot format");
5801         }
5802
5803         my $type = git_get_type("$hash^{}");
5804         if (!$type) {
5805                 die_error(404, 'Object does not exist');
5806         }  elsif ($type eq 'blob') {
5807                 die_error(400, 'Object is not a tree-ish');
5808         }
5809
5810         my ($name, $prefix) = snapshot_name($project, $hash);
5811         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5812         my $cmd = quote_command(
5813                 git_cmd(), 'archive',
5814                 "--format=$known_snapshot_formats{$format}{'format'}",
5815                 "--prefix=$prefix/", $hash);
5816         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5817                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5818         }
5819
5820         $filename =~ s/(["\\])/\\$1/g;
5821         print $cgi->header(
5822                 -type => $known_snapshot_formats{$format}{'type'},
5823                 -content_disposition => 'inline; filename="' . $filename . '"',
5824                 -status => '200 OK');
5825
5826         open my $fd, "-|", $cmd
5827                 or die_error(500, "Execute git-archive failed");
5828         binmode STDOUT, ':raw';
5829         print <$fd>;
5830         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5831         close $fd;
5832 }
5833
5834 sub git_log_generic {
5835         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5836
5837         my $head = git_get_head_hash($project);
5838         if (!defined $base) {
5839                 $base = $head;
5840         }
5841         if (!defined $page) {
5842                 $page = 0;
5843         }
5844         my $refs = git_get_references();
5845
5846         my $commit_hash = $base;
5847         if (defined $parent) {
5848                 $commit_hash = "$parent..$base";
5849         }
5850         my @commitlist =
5851                 parse_commits($commit_hash, 101, (100 * $page),
5852                               defined $file_name ? ($file_name, "--full-history") : ());
5853
5854         my $ftype;
5855         if (!defined $file_hash && defined $file_name) {
5856                 # some commits could have deleted file in question,
5857                 # and not have it in tree, but one of them has to have it
5858                 for (my $i = 0; $i < @commitlist; $i++) {
5859                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5860                         last if defined $file_hash;
5861                 }
5862         }
5863         if (defined $file_hash) {
5864                 $ftype = git_get_type($file_hash);
5865         }
5866         if (defined $file_name && !defined $ftype) {
5867                 die_error(500, "Unknown type of object");
5868         }
5869         my %co;
5870         if (defined $file_name) {
5871                 %co = parse_commit($base)
5872                         or die_error(404, "Unknown commit object");
5873         }
5874
5875
5876         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5877         my $next_link = '';
5878         if ($#commitlist >= 100) {
5879                 $next_link =
5880                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5881                                  -accesskey => "n", -title => "Alt-n"}, "next");
5882         }
5883         my $patch_max = gitweb_get_feature('patches');
5884         if ($patch_max && !defined $file_name) {
5885                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5886                         $paging_nav .= " &sdot; " .
5887                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5888                                         "patches");
5889                 }
5890         }
5891
5892         git_header_html();
5893         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5894         if (defined $file_name) {
5895                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5896         } else {
5897                 git_print_header_div('summary', $project)
5898         }
5899         git_print_page_path($file_name, $ftype, $hash_base)
5900                 if (defined $file_name);
5901
5902         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5903                      $file_name, $file_hash, $ftype);
5904
5905         git_footer_html();
5906 }
5907
5908 sub git_log {
5909         git_log_generic('log', \&git_log_body,
5910                         $hash, $hash_parent);
5911 }
5912
5913 sub git_commit {
5914         $hash ||= $hash_base || "HEAD";
5915         my %co = parse_commit($hash)
5916             or die_error(404, "Unknown commit object");
5917
5918         my $parent  = $co{'parent'};
5919         my $parents = $co{'parents'}; # listref
5920
5921         # we need to prepare $formats_nav before any parameter munging
5922         my $formats_nav;
5923         if (!defined $parent) {
5924                 # --root commitdiff
5925                 $formats_nav .= '(initial)';
5926         } elsif (@$parents == 1) {
5927                 # single parent commit
5928                 $formats_nav .=
5929                         '(parent: ' .
5930                         $cgi->a({-href => href(action=>"commit",
5931                                                hash=>$parent)},
5932                                 esc_html(substr($parent, 0, 7))) .
5933                         ')';
5934         } else {
5935                 # merge commit
5936                 $formats_nav .=
5937                         '(merge: ' .
5938                         join(' ', map {
5939                                 $cgi->a({-href => href(action=>"commit",
5940                                                        hash=>$_)},
5941                                         esc_html(substr($_, 0, 7)));
5942                         } @$parents ) .
5943                         ')';
5944         }
5945         if (gitweb_check_feature('patches') && @$parents <= 1) {
5946                 $formats_nav .= " | " .
5947                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5948                                 "patch");
5949         }
5950
5951         if (!defined $parent) {
5952                 $parent = "--root";
5953         }
5954         my @difftree;
5955         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5956                 @diff_opts,
5957                 (@$parents <= 1 ? $parent : '-c'),
5958                 $hash, "--"
5959                 or die_error(500, "Open git-diff-tree failed");
5960         @difftree = map { chomp; $_ } <$fd>;
5961         close $fd or die_error(404, "Reading git-diff-tree failed");
5962
5963         # non-textual hash id's can be cached
5964         my $expires;
5965         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5966                 $expires = "+1d";
5967         }
5968         my $refs = git_get_references();
5969         my $ref = format_ref_marker($refs, $co{'id'});
5970
5971         git_header_html(undef, $expires);
5972         git_print_page_nav('commit', '',
5973                            $hash, $co{'tree'}, $hash,
5974                            $formats_nav);
5975
5976         if (defined $co{'parent'}) {
5977                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5978         } else {
5979                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5980         }
5981         print "<div class=\"title_text\">\n" .
5982               "<table class=\"object_header\">\n";
5983         git_print_authorship_rows(\%co);
5984         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5985         print "<tr>" .
5986               "<td>tree</td>" .
5987               "<td class=\"sha1\">" .
5988               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5989                        class => "list"}, $co{'tree'}) .
5990               "</td>" .
5991               "<td class=\"link\">" .
5992               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5993                       "tree");
5994         my $snapshot_links = format_snapshot_links($hash);
5995         if (defined $snapshot_links) {
5996                 print " | " . $snapshot_links;
5997         }
5998         print "</td>" .
5999               "</tr>\n";
6000
6001         foreach my $par (@$parents) {
6002                 print "<tr>" .
6003                       "<td>parent</td>" .
6004                       "<td class=\"sha1\">" .
6005                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6006                                class => "list"}, $par) .
6007                       "</td>" .
6008                       "<td class=\"link\">" .
6009                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6010                       " | " .
6011                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6012                       "</td>" .
6013                       "</tr>\n";
6014         }
6015         print "</table>".
6016               "</div>\n";
6017
6018         print "<div class=\"page_body\">\n";
6019         git_print_log($co{'comment'});
6020         print "</div>\n";
6021
6022         git_difftree_body(\@difftree, $hash, @$parents);
6023
6024         git_footer_html();
6025 }
6026
6027 sub git_object {
6028         # object is defined by:
6029         # - hash or hash_base alone
6030         # - hash_base and file_name
6031         my $type;
6032
6033         # - hash or hash_base alone
6034         if ($hash || ($hash_base && !defined $file_name)) {
6035                 my $object_id = $hash || $hash_base;
6036
6037                 open my $fd, "-|", quote_command(
6038                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6039                         or die_error(404, "Object does not exist");
6040                 $type = <$fd>;
6041                 chomp $type;
6042                 close $fd
6043                         or die_error(404, "Object does not exist");
6044
6045         # - hash_base and file_name
6046         } elsif ($hash_base && defined $file_name) {
6047                 $file_name =~ s,/+$,,;
6048
6049                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6050                         or die_error(404, "Base object does not exist");
6051
6052                 # here errors should not hapen
6053                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6054                         or die_error(500, "Open git-ls-tree failed");
6055                 my $line = <$fd>;
6056                 close $fd;
6057
6058                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6059                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6060                         die_error(404, "File or directory for given base does not exist");
6061                 }
6062                 $type = $2;
6063                 $hash = $3;
6064         } else {
6065                 die_error(400, "Not enough information to find object");
6066         }
6067
6068         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6069                                           hash=>$hash, hash_base=>$hash_base,
6070                                           file_name=>$file_name),
6071                              -status => '302 Found');
6072 }
6073
6074 sub git_blobdiff {
6075         my $format = shift || 'html';
6076
6077         my $fd;
6078         my @difftree;
6079         my %diffinfo;
6080         my $expires;
6081
6082         # preparing $fd and %diffinfo for git_patchset_body
6083         # new style URI
6084         if (defined $hash_base && defined $hash_parent_base) {
6085                 if (defined $file_name) {
6086                         # read raw output
6087                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6088                                 $hash_parent_base, $hash_base,
6089                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6090                                 or die_error(500, "Open git-diff-tree failed");
6091                         @difftree = map { chomp; $_ } <$fd>;
6092                         close $fd
6093                                 or die_error(404, "Reading git-diff-tree failed");
6094                         @difftree
6095                                 or die_error(404, "Blob diff not found");
6096
6097                 } elsif (defined $hash &&
6098                          $hash =~ /[0-9a-fA-F]{40}/) {
6099                         # try to find filename from $hash
6100
6101                         # read filtered raw output
6102                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6103                                 $hash_parent_base, $hash_base, "--"
6104                                 or die_error(500, "Open git-diff-tree failed");
6105                         @difftree =
6106                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6107                                 # $hash == to_id
6108                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6109                                 map { chomp; $_ } <$fd>;
6110                         close $fd
6111                                 or die_error(404, "Reading git-diff-tree failed");
6112                         @difftree
6113                                 or die_error(404, "Blob diff not found");
6114
6115                 } else {
6116                         die_error(400, "Missing one of the blob diff parameters");
6117                 }
6118
6119                 if (@difftree > 1) {
6120                         die_error(400, "Ambiguous blob diff specification");
6121                 }
6122
6123                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6124                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6125                 $file_name   ||= $diffinfo{'to_file'};
6126
6127                 $hash_parent ||= $diffinfo{'from_id'};
6128                 $hash        ||= $diffinfo{'to_id'};
6129
6130                 # non-textual hash id's can be cached
6131                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6132                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6133                         $expires = '+1d';
6134                 }
6135
6136                 # open patch output
6137                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6138                         '-p', ($format eq 'html' ? "--full-index" : ()),
6139                         $hash_parent_base, $hash_base,
6140                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6141                         or die_error(500, "Open git-diff-tree failed");
6142         }
6143
6144         # old/legacy style URI -- not generated anymore since 1.4.3.
6145         if (!%diffinfo) {
6146                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6147         }
6148
6149         # header
6150         if ($format eq 'html') {
6151                 my $formats_nav =
6152                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6153                                 "raw");
6154                 git_header_html(undef, $expires);
6155                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6156                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6157                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6158                 } else {
6159                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6160                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6161                 }
6162                 if (defined $file_name) {
6163                         git_print_page_path($file_name, "blob", $hash_base);
6164                 } else {
6165                         print "<div class=\"page_path\"></div>\n";
6166                 }
6167
6168         } elsif ($format eq 'plain') {
6169                 print $cgi->header(
6170                         -type => 'text/plain',
6171                         -charset => 'utf-8',
6172                         -expires => $expires,
6173                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6174
6175                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6176
6177         } else {
6178                 die_error(400, "Unknown blobdiff format");
6179         }
6180
6181         # patch
6182         if ($format eq 'html') {
6183                 print "<div class=\"page_body\">\n";
6184
6185                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6186                 close $fd;
6187
6188                 print "</div>\n"; # class="page_body"
6189                 git_footer_html();
6190
6191         } else {
6192                 while (my $line = <$fd>) {
6193                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6194                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6195
6196                         print $line;
6197
6198                         last if $line =~ m!^\+\+\+!;
6199                 }
6200                 local $/ = undef;
6201                 print <$fd>;
6202                 close $fd;
6203         }
6204 }
6205
6206 sub git_blobdiff_plain {
6207         git_blobdiff('plain');
6208 }
6209
6210 sub git_commitdiff {
6211         my %params = @_;
6212         my $format = $params{-format} || 'html';
6213
6214         my ($patch_max) = gitweb_get_feature('patches');
6215         if ($format eq 'patch') {
6216                 die_error(403, "Patch view not allowed") unless $patch_max;
6217         }
6218
6219         $hash ||= $hash_base || "HEAD";
6220         my %co = parse_commit($hash)
6221             or die_error(404, "Unknown commit object");
6222
6223         # choose format for commitdiff for merge
6224         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6225                 $hash_parent = '--cc';
6226         }
6227         # we need to prepare $formats_nav before almost any parameter munging
6228         my $formats_nav;
6229         if ($format eq 'html') {
6230                 $formats_nav =
6231                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6232                                 "raw");
6233                 if ($patch_max && @{$co{'parents'}} <= 1) {
6234                         $formats_nav .= " | " .
6235                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6236                                         "patch");
6237                 }
6238
6239                 if (defined $hash_parent &&
6240                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6241                         # commitdiff with two commits given
6242                         my $hash_parent_short = $hash_parent;
6243                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6244                                 $hash_parent_short = substr($hash_parent, 0, 7);
6245                         }
6246                         $formats_nav .=
6247                                 ' (from';
6248                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6249                                 if ($co{'parents'}[$i] eq $hash_parent) {
6250                                         $formats_nav .= ' parent ' . ($i+1);
6251                                         last;
6252                                 }
6253                         }
6254                         $formats_nav .= ': ' .
6255                                 $cgi->a({-href => href(action=>"commitdiff",
6256                                                        hash=>$hash_parent)},
6257                                         esc_html($hash_parent_short)) .
6258                                 ')';
6259                 } elsif (!$co{'parent'}) {
6260                         # --root commitdiff
6261                         $formats_nav .= ' (initial)';
6262                 } elsif (scalar @{$co{'parents'}} == 1) {
6263                         # single parent commit
6264                         $formats_nav .=
6265                                 ' (parent: ' .
6266                                 $cgi->a({-href => href(action=>"commitdiff",
6267                                                        hash=>$co{'parent'})},
6268                                         esc_html(substr($co{'parent'}, 0, 7))) .
6269                                 ')';
6270                 } else {
6271                         # merge commit
6272                         if ($hash_parent eq '--cc') {
6273                                 $formats_nav .= ' | ' .
6274                                         $cgi->a({-href => href(action=>"commitdiff",
6275                                                                hash=>$hash, hash_parent=>'-c')},
6276                                                 'combined');
6277                         } else { # $hash_parent eq '-c'
6278                                 $formats_nav .= ' | ' .
6279                                         $cgi->a({-href => href(action=>"commitdiff",
6280                                                                hash=>$hash, hash_parent=>'--cc')},
6281                                                 'compact');
6282                         }
6283                         $formats_nav .=
6284                                 ' (merge: ' .
6285                                 join(' ', map {
6286                                         $cgi->a({-href => href(action=>"commitdiff",
6287                                                                hash=>$_)},
6288                                                 esc_html(substr($_, 0, 7)));
6289                                 } @{$co{'parents'}} ) .
6290                                 ')';
6291                 }
6292         }
6293
6294         my $hash_parent_param = $hash_parent;
6295         if (!defined $hash_parent_param) {
6296                 # --cc for multiple parents, --root for parentless
6297                 $hash_parent_param =
6298                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6299         }
6300
6301         # read commitdiff
6302         my $fd;
6303         my @difftree;
6304         if ($format eq 'html') {
6305                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6306                         "--no-commit-id", "--patch-with-raw", "--full-index",
6307                         $hash_parent_param, $hash, "--"
6308                         or die_error(500, "Open git-diff-tree failed");
6309
6310                 while (my $line = <$fd>) {
6311                         chomp $line;
6312                         # empty line ends raw part of diff-tree output
6313                         last unless $line;
6314                         push @difftree, scalar parse_difftree_raw_line($line);
6315                 }
6316
6317         } elsif ($format eq 'plain') {
6318                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6319                         '-p', $hash_parent_param, $hash, "--"
6320                         or die_error(500, "Open git-diff-tree failed");
6321         } elsif ($format eq 'patch') {
6322                 # For commit ranges, we limit the output to the number of
6323                 # patches specified in the 'patches' feature.
6324                 # For single commits, we limit the output to a single patch,
6325                 # diverging from the git-format-patch default.
6326                 my @commit_spec = ();
6327                 if ($hash_parent) {
6328                         if ($patch_max > 0) {
6329                                 push @commit_spec, "-$patch_max";
6330                         }
6331                         push @commit_spec, '-n', "$hash_parent..$hash";
6332                 } else {
6333                         if ($params{-single}) {
6334                                 push @commit_spec, '-1';
6335                         } else {
6336                                 if ($patch_max > 0) {
6337                                         push @commit_spec, "-$patch_max";
6338                                 }
6339                                 push @commit_spec, "-n";
6340                         }
6341                         push @commit_spec, '--root', $hash;
6342                 }
6343                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6344                         '--encoding=utf8', '--stdout', @commit_spec
6345                         or die_error(500, "Open git-format-patch failed");
6346         } else {
6347                 die_error(400, "Unknown commitdiff format");
6348         }
6349
6350         # non-textual hash id's can be cached
6351         my $expires;
6352         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6353                 $expires = "+1d";
6354         }
6355
6356         # write commit message
6357         if ($format eq 'html') {
6358                 my $refs = git_get_references();
6359                 my $ref = format_ref_marker($refs, $co{'id'});
6360
6361                 git_header_html(undef, $expires);
6362                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6363                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6364                 print "<div class=\"title_text\">\n" .
6365                       "<table class=\"object_header\">\n";
6366                 git_print_authorship_rows(\%co);
6367                 print "</table>".
6368                       "</div>\n";
6369                 print "<div class=\"page_body\">\n";
6370                 if (@{$co{'comment'}} > 1) {
6371                         print "<div class=\"log\">\n";
6372                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6373                         print "</div>\n"; # class="log"
6374                 }
6375
6376         } elsif ($format eq 'plain') {
6377                 my $refs = git_get_references("tags");
6378                 my $tagname = git_get_rev_name_tags($hash);
6379                 my $filename = basename($project) . "-$hash.patch";
6380
6381                 print $cgi->header(
6382                         -type => 'text/plain',
6383                         -charset => 'utf-8',
6384                         -expires => $expires,
6385                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6386                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6387                 print "From: " . to_utf8($co{'author'}) . "\n";
6388                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6389                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6390
6391                 print "X-Git-Tag: $tagname\n" if $tagname;
6392                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6393
6394                 foreach my $line (@{$co{'comment'}}) {
6395                         print to_utf8($line) . "\n";
6396                 }
6397                 print "---\n\n";
6398         } elsif ($format eq 'patch') {
6399                 my $filename = basename($project) . "-$hash.patch";
6400
6401                 print $cgi->header(
6402                         -type => 'text/plain',
6403                         -charset => 'utf-8',
6404                         -expires => $expires,
6405                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6406         }
6407
6408         # write patch
6409         if ($format eq 'html') {
6410                 my $use_parents = !defined $hash_parent ||
6411                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6412                 git_difftree_body(\@difftree, $hash,
6413                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6414                 print "<br/>\n";
6415
6416                 git_patchset_body($fd, \@difftree, $hash,
6417                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6418                 close $fd;
6419                 print "</div>\n"; # class="page_body"
6420                 git_footer_html();
6421
6422         } elsif ($format eq 'plain') {
6423                 local $/ = undef;
6424                 print <$fd>;
6425                 close $fd
6426                         or print "Reading git-diff-tree failed\n";
6427         } elsif ($format eq 'patch') {
6428                 local $/ = undef;
6429                 print <$fd>;
6430                 close $fd
6431                         or print "Reading git-format-patch failed\n";
6432         }
6433 }
6434
6435 sub git_commitdiff_plain {
6436         git_commitdiff(-format => 'plain');
6437 }
6438
6439 # format-patch-style patches
6440 sub git_patch {
6441         git_commitdiff(-format => 'patch', -single => 1);
6442 }
6443
6444 sub git_patches {
6445         git_commitdiff(-format => 'patch');
6446 }
6447
6448 sub git_history {
6449         git_log_generic('history', \&git_history_body,
6450                         $hash_base, $hash_parent_base,
6451                         $file_name, $hash);
6452 }
6453
6454 sub git_search {
6455         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6456         if (!defined $searchtext) {
6457                 die_error(400, "Text field is empty");
6458         }
6459         if (!defined $hash) {
6460                 $hash = git_get_head_hash($project);
6461         }
6462         my %co = parse_commit($hash);
6463         if (!%co) {
6464                 die_error(404, "Unknown commit object");
6465         }
6466         if (!defined $page) {
6467                 $page = 0;
6468         }
6469
6470         $searchtype ||= 'commit';
6471         if ($searchtype eq 'pickaxe') {
6472                 # pickaxe may take all resources of your box and run for several minutes
6473                 # with every query - so decide by yourself how public you make this feature
6474                 gitweb_check_feature('pickaxe')
6475                     or die_error(403, "Pickaxe is disabled");
6476         }
6477         if ($searchtype eq 'grep') {
6478                 gitweb_check_feature('grep')[0]
6479                     or die_error(403, "Grep is disabled");
6480         }
6481
6482         git_header_html();
6483
6484         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6485                 my $greptype;
6486                 if ($searchtype eq 'commit') {
6487                         $greptype = "--grep=";
6488                 } elsif ($searchtype eq 'author') {
6489                         $greptype = "--author=";
6490                 } elsif ($searchtype eq 'committer') {
6491                         $greptype = "--committer=";
6492                 }
6493                 $greptype .= $searchtext;
6494                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6495                                                $greptype, '--regexp-ignore-case',
6496                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6497
6498                 my $paging_nav = '';
6499                 if ($page > 0) {
6500                         $paging_nav .=
6501                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6502                                                        searchtext=>$searchtext,
6503                                                        searchtype=>$searchtype)},
6504                                         "first");
6505                         $paging_nav .= " &sdot; " .
6506                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6507                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6508                 } else {
6509                         $paging_nav .= "first";
6510                         $paging_nav .= " &sdot; prev";
6511                 }
6512                 my $next_link = '';
6513                 if ($#commitlist >= 100) {
6514                         $next_link =
6515                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6516                                          -accesskey => "n", -title => "Alt-n"}, "next");
6517                         $paging_nav .= " &sdot; $next_link";
6518                 } else {
6519                         $paging_nav .= " &sdot; next";
6520                 }
6521
6522                 if ($#commitlist >= 100) {
6523                 }
6524
6525                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6526                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6527                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6528         }
6529
6530         if ($searchtype eq 'pickaxe') {
6531                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6532                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6533
6534                 print "<table class=\"pickaxe search\">\n";
6535                 my $alternate = 1;
6536                 local $/ = "\n";
6537                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6538                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6539                         ($search_use_regexp ? '--pickaxe-regex' : ());
6540                 undef %co;
6541                 my @files;
6542                 while (my $line = <$fd>) {
6543                         chomp $line;
6544                         next unless $line;
6545
6546                         my %set = parse_difftree_raw_line($line);
6547                         if (defined $set{'commit'}) {
6548                                 # finish previous commit
6549                                 if (%co) {
6550                                         print "</td>\n" .
6551                                               "<td class=\"link\">" .
6552                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6553                                               " | " .
6554                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6555                                         print "</td>\n" .
6556                                               "</tr>\n";
6557                                 }
6558
6559                                 if ($alternate) {
6560                                         print "<tr class=\"dark\">\n";
6561                                 } else {
6562                                         print "<tr class=\"light\">\n";
6563                                 }
6564                                 $alternate ^= 1;
6565                                 %co = parse_commit($set{'commit'});
6566                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6567                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6568                                       "<td><i>$author</i></td>\n" .
6569                                       "<td>" .
6570                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6571                                               -class => "list subject"},
6572                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6573                         } elsif (defined $set{'to_id'}) {
6574                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6575
6576                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6577                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6578                                               -class => "list"},
6579                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6580                                       "<br/>\n";
6581                         }
6582                 }
6583                 close $fd;
6584
6585                 # finish last commit (warning: repetition!)
6586                 if (%co) {
6587                         print "</td>\n" .
6588                               "<td class=\"link\">" .
6589                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6590                               " | " .
6591                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6592                         print "</td>\n" .
6593                               "</tr>\n";
6594                 }
6595
6596                 print "</table>\n";
6597         }
6598
6599         if ($searchtype eq 'grep') {
6600                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6601                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6602
6603                 print "<table class=\"grep_search\">\n";
6604                 my $alternate = 1;
6605                 my $matches = 0;
6606                 local $/ = "\n";
6607                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6608                         $search_use_regexp ? ('-E', '-i') : '-F',
6609                         $searchtext, $co{'tree'};
6610                 my $lastfile = '';
6611                 while (my $line = <$fd>) {
6612                         chomp $line;
6613                         my ($file, $lno, $ltext, $binary);
6614                         last if ($matches++ > 1000);
6615                         if ($line =~ /^Binary file (.+) matches$/) {
6616                                 $file = $1;
6617                                 $binary = 1;
6618                         } else {
6619                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6620                         }
6621                         if ($file ne $lastfile) {
6622                                 $lastfile and print "</td></tr>\n";
6623                                 if ($alternate++) {
6624                                         print "<tr class=\"dark\">\n";
6625                                 } else {
6626                                         print "<tr class=\"light\">\n";
6627                                 }
6628                                 print "<td class=\"list\">".
6629                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6630                                                                file_name=>"$file"),
6631                                                 -class => "list"}, esc_path($file));
6632                                 print "</td><td>\n";
6633                                 $lastfile = $file;
6634                         }
6635                         if ($binary) {
6636                                 print "<div class=\"binary\">Binary file</div>\n";
6637                         } else {
6638                                 $ltext = untabify($ltext);
6639                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6640                                         $ltext = esc_html($1, -nbsp=>1);
6641                                         $ltext .= '<span class="match">';
6642                                         $ltext .= esc_html($2, -nbsp=>1);
6643                                         $ltext .= '</span>';
6644                                         $ltext .= esc_html($3, -nbsp=>1);
6645                                 } else {
6646                                         $ltext = esc_html($ltext, -nbsp=>1);
6647                                 }
6648                                 print "<div class=\"pre\">" .
6649                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6650                                                                file_name=>"$file").'#l'.$lno,
6651                                                 -class => "linenr"}, sprintf('%4i', $lno))
6652                                         . ' ' .  $ltext . "</div>\n";
6653                         }
6654                 }
6655                 if ($lastfile) {
6656                         print "</td></tr>\n";
6657                         if ($matches > 1000) {
6658                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6659                         }
6660                 } else {
6661                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6662                 }
6663                 close $fd;
6664
6665                 print "</table>\n";
6666         }
6667         git_footer_html();
6668 }
6669
6670 sub git_search_help {
6671         git_header_html();
6672         git_print_page_nav('','', $hash,$hash,$hash);
6673         print <<EOT;
6674 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6675 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6676 the pattern entered is recognized as the POSIX extended
6677 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6678 insensitive).</p>
6679 <dl>
6680 <dt><b>commit</b></dt>
6681 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6682 EOT
6683         my $have_grep = gitweb_check_feature('grep');
6684         if ($have_grep) {
6685                 print <<EOT;
6686 <dt><b>grep</b></dt>
6687 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6688     a different one) are searched for the given pattern. On large trees, this search can take
6689 a while and put some strain on the server, so please use it with some consideration. Note that
6690 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6691 case-sensitive.</dd>
6692 EOT
6693         }
6694         print <<EOT;
6695 <dt><b>author</b></dt>
6696 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6697 <dt><b>committer</b></dt>
6698 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6699 EOT
6700         my $have_pickaxe = gitweb_check_feature('pickaxe');
6701         if ($have_pickaxe) {
6702                 print <<EOT;
6703 <dt><b>pickaxe</b></dt>
6704 <dd>All commits that caused the string to appear or disappear from any file (changes that
6705 added, removed or "modified" the string) will be listed. This search can take a while and
6706 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6707 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6708 EOT
6709         }
6710         print "</dl>\n";
6711         git_footer_html();
6712 }
6713
6714 sub git_shortlog {
6715         git_log_generic('shortlog', \&git_shortlog_body,
6716                         $hash, $hash_parent);
6717 }
6718
6719 ## ......................................................................
6720 ## feeds (RSS, Atom; OPML)
6721
6722 sub git_feed {
6723         my $format = shift || 'atom';
6724         my $have_blame = gitweb_check_feature('blame');
6725
6726         # Atom: http://www.atomenabled.org/developers/syndication/
6727         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6728         if ($format ne 'rss' && $format ne 'atom') {
6729                 die_error(400, "Unknown web feed format");
6730         }
6731
6732         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6733         my $head = $hash || 'HEAD';
6734         my @commitlist = parse_commits($head, 150, 0, $file_name);
6735
6736         my %latest_commit;
6737         my %latest_date;
6738         my $content_type = "application/$format+xml";
6739         if (defined $cgi->http('HTTP_ACCEPT') &&
6740                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6741                 # browser (feed reader) prefers text/xml
6742                 $content_type = 'text/xml';
6743         }
6744         if (defined($commitlist[0])) {
6745                 %latest_commit = %{$commitlist[0]};
6746                 my $latest_epoch = $latest_commit{'committer_epoch'};
6747                 %latest_date   = parse_date($latest_epoch);
6748                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6749                 if (defined $if_modified) {
6750                         my $since;
6751                         if (eval { require HTTP::Date; 1; }) {
6752                                 $since = HTTP::Date::str2time($if_modified);
6753                         } elsif (eval { require Time::ParseDate; 1; }) {
6754                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6755                         }
6756                         if (defined $since && $latest_epoch <= $since) {
6757                                 print $cgi->header(
6758                                         -type => $content_type,
6759                                         -charset => 'utf-8',
6760                                         -last_modified => $latest_date{'rfc2822'},
6761                                         -status => '304 Not Modified');
6762                                 return;
6763                         }
6764                 }
6765                 print $cgi->header(
6766                         -type => $content_type,
6767                         -charset => 'utf-8',
6768                         -last_modified => $latest_date{'rfc2822'});
6769         } else {
6770                 print $cgi->header(
6771                         -type => $content_type,
6772                         -charset => 'utf-8');
6773         }
6774
6775         # Optimization: skip generating the body if client asks only
6776         # for Last-Modified date.
6777         return if ($cgi->request_method() eq 'HEAD');
6778
6779         # header variables
6780         my $title = "$site_name - $project/$action";
6781         my $feed_type = 'log';
6782         if (defined $hash) {
6783                 $title .= " - '$hash'";
6784                 $feed_type = 'branch log';
6785                 if (defined $file_name) {
6786                         $title .= " :: $file_name";
6787                         $feed_type = 'history';
6788                 }
6789         } elsif (defined $file_name) {
6790                 $title .= " - $file_name";
6791                 $feed_type = 'history';
6792         }
6793         $title .= " $feed_type";
6794         my $descr = git_get_project_description($project);
6795         if (defined $descr) {
6796                 $descr = esc_html($descr);
6797         } else {
6798                 $descr = "$project " .
6799                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6800                          " feed";
6801         }
6802         my $owner = git_get_project_owner($project);
6803         $owner = esc_html($owner);
6804
6805         #header
6806         my $alt_url;
6807         if (defined $file_name) {
6808                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6809         } elsif (defined $hash) {
6810                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6811         } else {
6812                 $alt_url = href(-full=>1, action=>"summary");
6813         }
6814         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6815         if ($format eq 'rss') {
6816                 print <<XML;
6817 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6818 <channel>
6819 XML
6820                 print "<title>$title</title>\n" .
6821                       "<link>$alt_url</link>\n" .
6822                       "<description>$descr</description>\n" .
6823                       "<language>en</language>\n" .
6824                       # project owner is responsible for 'editorial' content
6825                       "<managingEditor>$owner</managingEditor>\n";
6826                 if (defined $logo || defined $favicon) {
6827                         # prefer the logo to the favicon, since RSS
6828                         # doesn't allow both
6829                         my $img = esc_url($logo || $favicon);
6830                         print "<image>\n" .
6831                               "<url>$img</url>\n" .
6832                               "<title>$title</title>\n" .
6833                               "<link>$alt_url</link>\n" .
6834                               "</image>\n";
6835                 }
6836                 if (%latest_date) {
6837                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6838                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6839                 }
6840                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6841         } elsif ($format eq 'atom') {
6842                 print <<XML;
6843 <feed xmlns="http://www.w3.org/2005/Atom">
6844 XML
6845                 print "<title>$title</title>\n" .
6846                       "<subtitle>$descr</subtitle>\n" .
6847                       '<link rel="alternate" type="text/html" href="' .
6848                       $alt_url . '" />' . "\n" .
6849                       '<link rel="self" type="' . $content_type . '" href="' .
6850                       $cgi->self_url() . '" />' . "\n" .
6851                       "<id>" . href(-full=>1) . "</id>\n" .
6852                       # use project owner for feed author
6853                       "<author><name>$owner</name></author>\n";
6854                 if (defined $favicon) {
6855                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6856                 }
6857                 if (defined $logo_url) {
6858                         # not twice as wide as tall: 72 x 27 pixels
6859                         print "<logo>" . esc_url($logo) . "</logo>\n";
6860                 }
6861                 if (! %latest_date) {
6862                         # dummy date to keep the feed valid until commits trickle in:
6863                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6864                 } else {
6865                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6866                 }
6867                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6868         }
6869
6870         # contents
6871         for (my $i = 0; $i <= $#commitlist; $i++) {
6872                 my %co = %{$commitlist[$i]};
6873                 my $commit = $co{'id'};
6874                 # we read 150, we always show 30 and the ones more recent than 48 hours
6875                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6876                         last;
6877                 }
6878                 my %cd = parse_date($co{'author_epoch'});
6879
6880                 # get list of changed files
6881                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6882                         $co{'parent'} || "--root",
6883                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6884                         or next;
6885                 my @difftree = map { chomp; $_ } <$fd>;
6886                 close $fd
6887                         or next;
6888
6889                 # print element (entry, item)
6890                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6891                 if ($format eq 'rss') {
6892                         print "<item>\n" .
6893                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6894                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6895                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6896                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6897                               "<link>$co_url</link>\n" .
6898                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6899                               "<content:encoded>" .
6900                               "<![CDATA[\n";
6901                 } elsif ($format eq 'atom') {
6902                         print "<entry>\n" .
6903                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6904                               "<updated>$cd{'iso-8601'}</updated>\n" .
6905                               "<author>\n" .
6906                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6907                         if ($co{'author_email'}) {
6908                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6909                         }
6910                         print "</author>\n" .
6911                               # use committer for contributor
6912                               "<contributor>\n" .
6913                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6914                         if ($co{'committer_email'}) {
6915                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6916                         }
6917                         print "</contributor>\n" .
6918                               "<published>$cd{'iso-8601'}</published>\n" .
6919                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6920                               "<id>$co_url</id>\n" .
6921                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6922                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6923                 }
6924                 my $comment = $co{'comment'};
6925                 print "<pre>\n";
6926                 foreach my $line (@$comment) {
6927                         $line = esc_html($line);
6928                         print "$line\n";
6929                 }
6930                 print "</pre><ul>\n";
6931                 foreach my $difftree_line (@difftree) {
6932                         my %difftree = parse_difftree_raw_line($difftree_line);
6933                         next if !$difftree{'from_id'};
6934
6935                         my $file = $difftree{'file'} || $difftree{'to_file'};
6936
6937                         print "<li>" .
6938                               "[" .
6939                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6940                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6941                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6942                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6943                                       -title => "diff"}, 'D');
6944                         if ($have_blame) {
6945                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6946                                                              file_name=>$file, hash_base=>$commit),
6947                                               -title => "blame"}, 'B');
6948                         }
6949                         # if this is not a feed of a file history
6950                         if (!defined $file_name || $file_name ne $file) {
6951                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6952                                                              file_name=>$file, hash=>$commit),
6953                                               -title => "history"}, 'H');
6954                         }
6955                         $file = esc_path($file);
6956                         print "] ".
6957                               "$file</li>\n";
6958                 }
6959                 if ($format eq 'rss') {
6960                         print "</ul>]]>\n" .
6961                               "</content:encoded>\n" .
6962                               "</item>\n";
6963                 } elsif ($format eq 'atom') {
6964                         print "</ul>\n</div>\n" .
6965                               "</content>\n" .
6966                               "</entry>\n";
6967                 }
6968         }
6969
6970         # end of feed
6971         if ($format eq 'rss') {
6972                 print "</channel>\n</rss>\n";
6973         } elsif ($format eq 'atom') {
6974                 print "</feed>\n";
6975         }
6976 }
6977
6978 sub git_rss {
6979         git_feed('rss');
6980 }
6981
6982 sub git_atom {
6983         git_feed('atom');
6984 }
6985
6986 sub git_opml {
6987         my @list = git_get_projects_list();
6988
6989         print $cgi->header(
6990                 -type => 'text/xml',
6991                 -charset => 'utf-8',
6992                 -content_disposition => 'inline; filename="opml.xml"');
6993
6994         print <<XML;
6995 <?xml version="1.0" encoding="utf-8"?>
6996 <opml version="1.0">
6997 <head>
6998   <title>$site_name OPML Export</title>
6999 </head>
7000 <body>
7001 <outline text="git RSS feeds">
7002 XML
7003
7004         foreach my $pr (@list) {
7005                 my %proj = %$pr;
7006                 my $head = git_get_head_hash($proj{'path'});
7007                 if (!defined $head) {
7008                         next;
7009                 }
7010                 $git_dir = "$projectroot/$proj{'path'}";
7011                 my %co = parse_commit($head);
7012                 if (!%co) {
7013                         next;
7014                 }
7015
7016                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7017                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7018                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7019                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7020         }
7021         print <<XML;
7022 </outline>
7023 </body>
7024 </opml>
7025 XML
7026 }