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