git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "++GIT_VERSION++";
  32
  33 our ($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 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # information about snapshot formats that gitweb is capable of serving
 169 our %known_snapshot_formats = (
 170         # name => {
 171         #       'display' => display name,
 172         #       'type' => mime type,
 173         #       'suffix' => filename suffix,
 174         #       'format' => --format for git-archive,
 175         #       'compressor' => [compressor command and arguments]
 176         #                       (array reference, optional)
 177         #       'disabled' => boolean (optional)}
 178         #
 179         'tgz' => {
 180                 'display' => 'tar.gz',
 181                 'type' => 'application/x-gzip',
 182                 'suffix' => '.tar.gz',
 183                 'format' => 'tar',
 184                 'compressor' => ['gzip']},
 185
 186         'tbz2' => {
 187                 'display' => 'tar.bz2',
 188                 'type' => 'application/x-bzip2',
 189                 'suffix' => '.tar.bz2',
 190                 'format' => 'tar',
 191                 'compressor' => ['bzip2']},
 192
 193         'txz' => {
 194                 'display' => 'tar.xz',
 195                 'type' => 'application/x-xz',
 196                 'suffix' => '.tar.xz',
 197                 'format' => 'tar',
 198                 'compressor' => ['xz'],
 199                 'disabled' => 1},
 200
 201         'zip' => {
 202                 'display' => 'zip',
 203                 'type' => 'application/x-zip',
 204                 'suffix' => '.zip',
 205                 'format' => 'zip'},
 206 );
 207
 208 # Aliases so we understand old gitweb.snapshot values in repository
 209 # configuration.
 210 our %known_snapshot_format_aliases = (
 211         'gzip'  => 'tgz',
 212         'bzip2' => 'tbz2',
 213         'xz'    => 'txz',
 214
 215         # backward compatibility: legacy gitweb config support
 216         'x-gzip' => undef, 'gz' => undef,
 217         'x-bzip2' => undef, 'bz2' => undef,
 218         'x-zip' => undef, '' => undef,
 219 );
 220
 221 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 222 # are changed, it may be appropriate to change these values too via
 223 # $GITWEB_CONFIG.
 224 our %avatar_size = (
 225         'default' => 16,
 226         'double'  => 32
 227 );
 228
 229 # Used to set the maximum load that we will still respond to gitweb queries.
 230 # If server load exceed this value then return "503 server busy" error.
 231 # If gitweb cannot determined server load, it is taken to be 0.
 232 # Leave it undefined (or set to 'undef') to turn off load checking.
 233 our $maxload = 300;
 234
 235 # You define site-wide feature defaults here; override them with
 236 # $GITWEB_CONFIG as necessary.
 237 our %feature = (
 238         # feature => {
 239         #       'sub' => feature-sub (subroutine),
 240         #       'override' => allow-override (boolean),
 241         #       'default' => [ default options...] (array reference)}
 242         #
 243         # if feature is overridable (it means that allow-override has true value),
 244         # then feature-sub will be called with default options as parameters;
 245         # return value of feature-sub indicates if to enable specified feature
 246         #
 247         # if there is no 'sub' key (no feature-sub), then feature cannot be
 248         # overriden
 249         #
 250         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 251         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 252         # is enabled
 253
 254         # Enable the 'blame' blob view, showing the last commit that modified
 255         # each line in the file. This can be very CPU-intensive.
 256
 257         # To enable system wide have in $GITWEB_CONFIG
 258         # $feature{'blame'}{'default'} = [1];
 259         # To have project specific config enable override in $GITWEB_CONFIG
 260         # $feature{'blame'}{'override'} = 1;
 261         # and in project config gitweb.blame = 0|1;
 262         'blame' => {
 263                 'sub' => sub { feature_bool('blame', @_) },
 264                 'override' => 0,
 265                 'default' => [0]},
 266
 267         # Enable the 'snapshot' link, providing a compressed archive of any
 268         # tree. This can potentially generate high traffic if you have large
 269         # project.
 270
 271         # Value is a list of formats defined in %known_snapshot_formats that
 272         # you wish to offer.
 273         # To disable system wide have in $GITWEB_CONFIG
 274         # $feature{'snapshot'}{'default'} = [];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'snapshot'}{'override'} = 1;
 277         # and in project config, a comma-separated list of formats or "none"
 278         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 279         'snapshot' => {
 280                 'sub' => \&feature_snapshot,
 281                 'override' => 0,
 282                 'default' => ['tgz']},
 283
 284         # Enable text search, which will list the commits which match author,
 285         # committer or commit text to a given string.  Enabled by default.
 286         # Project specific override is not supported.
 287         'search' => {
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable grep search, which will list the files in currently selected
 292         # tree containing the given string. Enabled by default. This can be
 293         # potentially CPU-intensive, of course.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'grep'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'grep'}{'override'} = 1;
 299         # and in project config gitweb.grep = 0|1;
 300         'grep' => {
 301                 'sub' => sub { feature_bool('grep', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable the pickaxe search, which will list the commits that modified
 306         # a given string in a file. This can be practical and quite faster
 307         # alternative to 'blame', but still potentially CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'pickaxe'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'pickaxe'}{'override'} = 1;
 313         # and in project config gitweb.pickaxe = 0|1;
 314         'pickaxe' => {
 315                 'sub' => sub { feature_bool('pickaxe', @_) },
 316                 'override' => 0,
 317                 'default' => [1]},
 318
 319         # Enable showing size of blobs in a 'tree' view, in a separate
 320         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 321
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'show-sizes'}{'default'} = [0];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'show-sizes'}{'override'} = 1;
 326         # and in project config gitweb.showsizes = 0|1;
 327         'show-sizes' => {
 328                 'sub' => sub { feature_bool('showsizes', @_) },
 329                 'override' => 0,
 330                 'default' => [1]},
 331
 332         # Make gitweb use an alternative format of the URLs which can be
 333         # more readable and natural-looking: project name is embedded
 334         # directly in the path and the query string contains other
 335         # auxiliary information. All gitweb installations recognize
 336         # URL in either format; this configures in which formats gitweb
 337         # generates links.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pathinfo'}{'default'} = [1];
 341         # Project specific override is not supported.
 342
 343         # Note that you will need to change the default location of CSS,
 344         # favicon, logo and possibly other files to an absolute URL. Also,
 345         # if gitweb.cgi serves as your indexfile, you will need to force
 346         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 347         'pathinfo' => {
 348                 'override' => 0,
 349                 'default' => [0]},
 350
 351         # Make gitweb consider projects in project root subdirectories
 352         # to be forks of existing projects. Given project $projname.git,
 353         # projects matching $projname/*.git will not be shown in the main
 354         # projects list, instead a '+' mark will be added to $projname
 355         # there and a 'forks' view will be enabled for the project, listing
 356         # all the forks. If project list is taken from a file, forks have
 357         # to be listed after the main project.
 358
 359         # To enable system wide have in $GITWEB_CONFIG
 360         # $feature{'forks'}{'default'} = [1];
 361         # Project specific override is not supported.
 362         'forks' => {
 363                 'override' => 0,
 364                 'default' => [0]},
 365
 366         # Insert custom links to the action bar of all project pages.
 367         # This enables you mainly to link to third-party scripts integrating
 368         # into gitweb; e.g. git-browser for graphical history representation
 369         # or custom web-based repository administration interface.
 370
 371         # The 'default' value consists of a list of triplets in the form
 372         # (label, link, position) where position is the label after which
 373         # to insert the link and link is a format string where %n expands
 374         # to the project name, %f to the project path within the filesystem,
 375         # %h to the current hash (h gitweb parameter) and %b to the current
 376         # hash base (hb gitweb parameter); %% expands to %.
 377
 378         # To enable system wide have in $GITWEB_CONFIG e.g.
 379         # $feature{'actions'}{'default'} = [('graphiclog',
 380         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 381         # Project specific override is not supported.
 382         'actions' => {
 383                 'override' => 0,
 384                 'default' => []},
 385
 386         # Allow gitweb scan project content tags described in ctags/
 387         # of project repository, and display the popular Web 2.0-ish
 388         # "tag cloud" near the project list. Note that this is something
 389         # COMPLETELY different from the normal Git tags.
 390
 391         # gitweb by itself can show existing tags, but it does not handle
 392         # tagging itself; you need an external application for that.
 393         # For an example script, check Girocco's cgi/tagproj.cgi.
 394         # You may want to install the HTML::TagCloud Perl module to get
 395         # a pretty tag cloud instead of just a list of tags.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 399         # Project specific override is not supported.
 400         'ctags' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # The maximum number of patches in a patchset generated in patch
 405         # view. Set this to 0 or undef to disable patch view, or to a
 406         # negative number to remove any limit.
 407
 408         # To disable system wide have in $GITWEB_CONFIG
 409         # $feature{'patches'}{'default'} = [0];
 410         # To have project specific config enable override in $GITWEB_CONFIG
 411         # $feature{'patches'}{'override'} = 1;
 412         # and in project config gitweb.patches = 0|n;
 413         # where n is the maximum number of patches allowed in a patchset.
 414         'patches' => {
 415                 'sub' => \&feature_patches,
 416                 'override' => 0,
 417                 'default' => [16]},
 418
 419         # Avatar support. When this feature is enabled, views such as
 420         # shortlog or commit will display an avatar associated with
 421         # the email of the committer(s) and/or author(s).
 422
 423         # Currently available providers are gravatar and picon.
 424         # If an unknown provider is specified, the feature is disabled.
 425
 426         # Gravatar depends on Digest::MD5.
 427         # Picon currently relies on the indiana.edu database.
 428
 429         # To enable system wide have in $GITWEB_CONFIG
 430         # $feature{'avatar'}{'default'} = ['<provider>'];
 431         # where <provider> is either gravatar or picon.
 432         # To have project specific config enable override in $GITWEB_CONFIG
 433         # $feature{'avatar'}{'override'} = 1;
 434         # and in project config gitweb.avatar = <provider>;
 435         'avatar' => {
 436                 'sub' => \&feature_avatar,
 437                 'override' => 0,
 438                 'default' => ['']},
 439
 440         # Enable displaying how much time and how many git commands
 441         # it took to generate and display page.  Disabled by default.
 442         # Project specific override is not supported.
 443         'timed' => {
 444                 'override' => 0,
 445                 'default' => [0]},
 446
 447         # Enable turning some links into links to actions which require
 448         # JavaScript to run (like 'blame_incremental').  Not enabled by
 449         # default.  Project specific override is currently not supported.
 450         'javascript-actions' => {
 451                 'override' => 0,
 452                 'default' => [0]},
 453 );
 454
 455 sub gitweb_get_feature {
 456         my ($name) = @_;
 457         return unless exists $feature{$name};
 458         my ($sub, $override, @defaults) = (
 459                 $feature{$name}{'sub'},
 460                 $feature{$name}{'override'},
 461                 @{$feature{$name}{'default'}});
 462         # project specific override is possible only if we have project
 463         our $git_dir; # global variable, declared later
 464         if (!$override || !defined $git_dir) {
 465                 return @defaults;
 466         }
 467         if (!defined $sub) {
 468                 warn "feature $name is not overridable";
 469                 return @defaults;
 470         }
 471         return $sub->(@defaults);
 472 }
 473
 474 # A wrapper to check if a given feature is enabled.
 475 # With this, you can say
 476 #
 477 #   my $bool_feat = gitweb_check_feature('bool_feat');
 478 #   gitweb_check_feature('bool_feat') or somecode;
 479 #
 480 # instead of
 481 #
 482 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 483 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 484 #
 485 sub gitweb_check_feature {
 486         return (gitweb_get_feature(@_))[0];
 487 }
 488
 489
 490 sub feature_bool {
 491         my $key = shift;
 492         my ($val) = git_get_project_config($key, '--bool');
 493
 494         if (!defined $val) {
 495                 return ($_[0]);
 496         } elsif ($val eq 'true') {
 497                 return (1);
 498         } elsif ($val eq 'false') {
 499                 return (0);
 500         }
 501 }
 502
 503 sub feature_snapshot {
 504         my (@fmts) = @_;
 505
 506         my ($val) = git_get_project_config('snapshot');
 507
 508         if ($val) {
 509                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 510         }
 511
 512         return @fmts;
 513 }
 514
 515 sub feature_patches {
 516         my @val = (git_get_project_config('patches', '--int'));
 517
 518         if (@val) {
 519                 return @val;
 520         }
 521
 522         return ($_[0]);
 523 }
 524
 525 sub feature_avatar {
 526         my @val = (git_get_project_config('avatar'));
 527
 528         return @val ? @val : @_;
 529 }
 530
 531 # checking HEAD file with -e is fragile if the repository was
 532 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 533 # and then pruned.
 534 sub check_head_link {
 535         my ($dir) = @_;
 536         my $headfile = "$dir/HEAD";
 537         return ((-e $headfile) ||
 538                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 539 }
 540
 541 sub check_export_ok {
 542         my ($dir) = @_;
 543         return (check_head_link($dir) &&
 544                 (!$export_ok || -e "$dir/$export_ok") &&
 545                 (!$export_auth_hook || $export_auth_hook->($dir)));
 546 }
 547
 548 # process alternate names for backward compatibility
 549 # filter out unsupported (unknown) snapshot formats
 550 sub filter_snapshot_fmts {
 551         my @fmts = @_;
 552
 553         @fmts = map {
 554                 exists $known_snapshot_format_aliases{$_} ?
 555                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 556         @fmts = grep {
 557                 exists $known_snapshot_formats{$_} &&
 558                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 559 }
 560
 561 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 562 sub evaluate_gitweb_config {
 563         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 564         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 565         # die if there are errors parsing config file
 566         if (-e $GITWEB_CONFIG) {
 567                 do $GITWEB_CONFIG;
 568                 die $@ if $@;
 569         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 570                 do $GITWEB_CONFIG_SYSTEM;
 571                 die $@ if $@;
 572         }
 573 }
 574
 575 # Get loadavg of system, to compare against $maxload.
 576 # Currently it requires '/proc/loadavg' present to get loadavg;
 577 # if it is not present it returns 0, which means no load checking.
 578 sub get_loadavg {
 579         if( -e '/proc/loadavg' ){
 580                 open my $fd, '<', '/proc/loadavg'
 581                         or return 0;
 582                 my @load = split(/\s+/, scalar <$fd>);
 583                 close $fd;
 584
 585                 # The first three columns measure CPU and IO utilization of the last one,
 586                 # five, and 10 minute periods.  The fourth column shows the number of
 587                 # currently running processes and the total number of processes in the m/n
 588                 # format.  The last column displays the last process ID used.
 589                 return $load[0] || 0;
 590         }
 591         # additional checks for load average should go here for things that don't export
 592         # /proc/loadavg
 593
 594         return 0;
 595 }
 596
 597 # version of the core git binary
 598 our $git_version;
 599 sub evaluate_git_version {
 600         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 601         $number_of_git_cmds++;
 602 }
 603
 604 sub check_loadavg {
 605         if (defined $maxload && get_loadavg() > $maxload) {
 606                 die_error(503, "The load average on the server is too high");
 607         }
 608 }
 609
 610 # ======================================================================
 611 # input validation and dispatch
 612
 613 # input parameters can be collected from a variety of sources (presently, CGI
 614 # and PATH_INFO), so we define an %input_params hash that collects them all
 615 # together during validation: this allows subsequent uses (e.g. href()) to be
 616 # agnostic of the parameter origin
 617
 618 our %input_params = ();
 619
 620 # input parameters are stored with the long parameter name as key. This will
 621 # also be used in the href subroutine to convert parameters to their CGI
 622 # equivalent, and since the href() usage is the most frequent one, we store
 623 # the name -> CGI key mapping here, instead of the reverse.
 624 #
 625 # XXX: Warning: If you touch this, check the search form for updating,
 626 # too.
 627
 628 our @cgi_param_mapping = (
 629         project => "p",
 630         action => "a",
 631         file_name => "f",
 632         file_parent => "fp",
 633         hash => "h",
 634         hash_parent => "hp",
 635         hash_base => "hb",
 636         hash_parent_base => "hpb",
 637         page => "pg",
 638         order => "o",
 639         searchtext => "s",
 640         searchtype => "st",
 641         snapshot_format => "sf",
 642         extra_options => "opt",
 643         search_use_regexp => "sr",
 644         # this must be last entry (for manipulation from JavaScript)
 645         javascript => "js"
 646 );
 647 our %cgi_param_mapping = @cgi_param_mapping;
 648
 649 # we will also need to know the possible actions, for validation
 650 our %actions = (
 651         "blame" => \&git_blame,
 652         "blame_incremental" => \&git_blame_incremental,
 653         "blame_data" => \&git_blame_data,
 654         "blobdiff" => \&git_blobdiff,
 655         "blobdiff_plain" => \&git_blobdiff_plain,
 656         "blob" => \&git_blob,
 657         "blob_plain" => \&git_blob_plain,
 658         "commitdiff" => \&git_commitdiff,
 659         "commitdiff_plain" => \&git_commitdiff_plain,
 660         "commit" => \&git_commit,
 661         "forks" => \&git_forks,
 662         "heads" => \&git_heads,
 663         "history" => \&git_history,
 664         "log" => \&git_log,
 665         "patch" => \&git_patch,
 666         "patches" => \&git_patches,
 667         "rss" => \&git_rss,
 668         "atom" => \&git_atom,
 669         "search" => \&git_search,
 670         "search_help" => \&git_search_help,
 671         "shortlog" => \&git_shortlog,
 672         "summary" => \&git_summary,
 673         "tag" => \&git_tag,
 674         "tags" => \&git_tags,
 675         "tree" => \&git_tree,
 676         "snapshot" => \&git_snapshot,
 677         "object" => \&git_object,
 678         # those below don't need $project
 679         "opml" => \&git_opml,
 680         "project_list" => \&git_project_list,
 681         "project_index" => \&git_project_index,
 682 );
 683
 684 # finally, we have the hash of allowed extra_options for the commands that
 685 # allow them
 686 our %allowed_options = (
 687         "--no-merges" => [ qw(rss atom log shortlog history) ],
 688 );
 689
 690 # fill %input_params with the CGI parameters. All values except for 'opt'
 691 # should be single values, but opt can be an array. We should probably
 692 # build an array of parameters that can be multi-valued, but since for the time
 693 # being it's only this one, we just single it out
 694 sub evaluate_query_params {
 695         our $cgi;
 696
 697         while (my ($name, $symbol) = each %cgi_param_mapping) {
 698                 if ($symbol eq 'opt') {
 699                         $input_params{$name} = [ $cgi->param($symbol) ];
 700                 } else {
 701                         $input_params{$name} = $cgi->param($symbol);
 702                 }
 703         }
 704 }
 705
 706 # now read PATH_INFO and update the parameter list for missing parameters
 707 sub evaluate_path_info {
 708         return if defined $input_params{'project'};
 709         return if !$path_info;
 710         $path_info =~ s,^/+,,;
 711         return if !$path_info;
 712
 713         # find which part of PATH_INFO is project
 714         my $project = $path_info;
 715         $project =~ s,/+$,,;
 716         while ($project && !check_head_link("$projectroot/$project")) {
 717                 $project =~ s,/*[^/]*$,,;
 718         }
 719         return unless $project;
 720         $input_params{'project'} = $project;
 721
 722         # do not change any parameters if an action is given using the query string
 723         return if $input_params{'action'};
 724         $path_info =~ s,^\Q$project\E/*,,;
 725
 726         # next, check if we have an action
 727         my $action = $path_info;
 728         $action =~ s,/.*$,,;
 729         if (exists $actions{$action}) {
 730                 $path_info =~ s,^$action/*,,;
 731                 $input_params{'action'} = $action;
 732         }
 733
 734         # list of actions that want hash_base instead of hash, but can have no
 735         # pathname (f) parameter
 736         my @wants_base = (
 737                 'tree',
 738                 'history',
 739         );
 740
 741         # we want to catch
 742         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 743         my ($parentrefname, $parentpathname, $refname, $pathname) =
 744                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 745
 746         # first, analyze the 'current' part
 747         if (defined $pathname) {
 748                 # we got "branch:filename" or "branch:dir/"
 749                 # we could use git_get_type(branch:pathname), but:
 750                 # - it needs $git_dir
 751                 # - it does a git() call
 752                 # - the convention of terminating directories with a slash
 753                 #   makes it superfluous
 754                 # - embedding the action in the PATH_INFO would make it even
 755                 #   more superfluous
 756                 $pathname =~ s,^/+,,;
 757                 if (!$pathname || substr($pathname, -1) eq "/") {
 758                         $input_params{'action'} ||= "tree";
 759                         $pathname =~ s,/$,,;
 760                 } else {
 761                         # the default action depends on whether we had parent info
 762                         # or not
 763                         if ($parentrefname) {
 764                                 $input_params{'action'} ||= "blobdiff_plain";
 765                         } else {
 766                                 $input_params{'action'} ||= "blob_plain";
 767                         }
 768                 }
 769                 $input_params{'hash_base'} ||= $refname;
 770                 $input_params{'file_name'} ||= $pathname;
 771         } elsif (defined $refname) {
 772                 # we got "branch". In this case we have to choose if we have to
 773                 # set hash or hash_base.
 774                 #
 775                 # Most of the actions without a pathname only want hash to be
 776                 # set, except for the ones specified in @wants_base that want
 777                 # hash_base instead. It should also be noted that hand-crafted
 778                 # links having 'history' as an action and no pathname or hash
 779                 # set will fail, but that happens regardless of PATH_INFO.
 780                 $input_params{'action'} ||= "shortlog";
 781                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 782                         $input_params{'hash_base'} ||= $refname;
 783                 } else {
 784                         $input_params{'hash'} ||= $refname;
 785                 }
 786         }
 787
 788         # next, handle the 'parent' part, if present
 789         if (defined $parentrefname) {
 790                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 791                 # someproject/blobdiff/oldrev..newrev:/filename
 792                 if ($parentpathname) {
 793                         $parentpathname =~ s,^/+,,;
 794                         $parentpathname =~ s,/$,,;
 795                         $input_params{'file_parent'} ||= $parentpathname;
 796                 } else {
 797                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 798                 }
 799                 # we assume that hash_parent_base is wanted if a path was specified,
 800                 # or if the action wants hash_base instead of hash
 801                 if (defined $input_params{'file_parent'} ||
 802                         grep { $_ eq $input_params{'action'} } @wants_base) {
 803                         $input_params{'hash_parent_base'} ||= $parentrefname;
 804                 } else {
 805                         $input_params{'hash_parent'} ||= $parentrefname;
 806                 }
 807         }
 808
 809         # for the snapshot action, we allow URLs in the form
 810         # $project/snapshot/$hash.ext
 811         # where .ext determines the snapshot and gets removed from the
 812         # passed $refname to provide the $hash.
 813         #
 814         # To be able to tell that $refname includes the format extension, we
 815         # require the following two conditions to be satisfied:
 816         # - the hash input parameter MUST have been set from the $refname part
 817         #   of the URL (i.e. they must be equal)
 818         # - the snapshot format MUST NOT have been defined already (e.g. from
 819         #   CGI parameter sf)
 820         # It's also useless to try any matching unless $refname has a dot,
 821         # so we check for that too
 822         if (defined $input_params{'action'} &&
 823                 $input_params{'action'} eq 'snapshot' &&
 824                 defined $refname && index($refname, '.') != -1 &&
 825                 $refname eq $input_params{'hash'} &&
 826                 !defined $input_params{'snapshot_format'}) {
 827                 # We loop over the known snapshot formats, checking for
 828                 # extensions. Allowed extensions are both the defined suffix
 829                 # (which includes the initial dot already) and the snapshot
 830                 # format key itself, with a prepended dot
 831                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 832                         my $hash = $refname;
 833                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 834                                 next;
 835                         }
 836                         my $sfx = $1;
 837                         # a valid suffix was found, so set the snapshot format
 838                         # and reset the hash parameter
 839                         $input_params{'snapshot_format'} = $fmt;
 840                         $input_params{'hash'} = $hash;
 841                         # we also set the format suffix to the one requested
 842                         # in the URL: this way a request for e.g. .tgz returns
 843                         # a .tgz instead of a .tar.gz
 844                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 845                         last;
 846                 }
 847         }
 848 }
 849
 850 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 851      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 852      $searchtext, $search_regexp);
 853 sub evaluate_and_validate_params {
 854         our $action = $input_params{'action'};
 855         if (defined $action) {
 856                 if (!validate_action($action)) {
 857                         die_error(400, "Invalid action parameter");
 858                 }
 859         }
 860
 861         # parameters which are pathnames
 862         our $project = $input_params{'project'};
 863         if (defined $project) {
 864                 if (!validate_project($project)) {
 865                         undef $project;
 866                         die_error(404, "No such project");
 867                 }
 868         }
 869
 870         our $file_name = $input_params{'file_name'};
 871         if (defined $file_name) {
 872                 if (!validate_pathname($file_name)) {
 873                         die_error(400, "Invalid file parameter");
 874                 }
 875         }
 876
 877         our $file_parent = $input_params{'file_parent'};
 878         if (defined $file_parent) {
 879                 if (!validate_pathname($file_parent)) {
 880                         die_error(400, "Invalid file parent parameter");
 881                 }
 882         }
 883
 884         # parameters which are refnames
 885         our $hash = $input_params{'hash'};
 886         if (defined $hash) {
 887                 if (!validate_refname($hash)) {
 888                         die_error(400, "Invalid hash parameter");
 889                 }
 890         }
 891
 892         our $hash_parent = $input_params{'hash_parent'};
 893         if (defined $hash_parent) {
 894                 if (!validate_refname($hash_parent)) {
 895                         die_error(400, "Invalid hash parent parameter");
 896                 }
 897         }
 898
 899         our $hash_base = $input_params{'hash_base'};
 900         if (defined $hash_base) {
 901                 if (!validate_refname($hash_base)) {
 902                         die_error(400, "Invalid hash base parameter");
 903                 }
 904         }
 905
 906         our @extra_options = @{$input_params{'extra_options'}};
 907         # @extra_options is always defined, since it can only be (currently) set from
 908         # CGI, and $cgi->param() returns the empty array in array context if the param
 909         # is not set
 910         foreach my $opt (@extra_options) {
 911                 if (not exists $allowed_options{$opt}) {
 912                         die_error(400, "Invalid option parameter");
 913                 }
 914                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 915                         die_error(400, "Invalid option parameter for this action");
 916                 }
 917         }
 918
 919         our $hash_parent_base = $input_params{'hash_parent_base'};
 920         if (defined $hash_parent_base) {
 921                 if (!validate_refname($hash_parent_base)) {
 922                         die_error(400, "Invalid hash parent base parameter");
 923                 }
 924         }
 925
 926         # other parameters
 927         our $page = $input_params{'page'};
 928         if (defined $page) {
 929                 if ($page =~ m/[^0-9]/) {
 930                         die_error(400, "Invalid page parameter");
 931                 }
 932         }
 933
 934         our $searchtype = $input_params{'searchtype'};
 935         if (defined $searchtype) {
 936                 if ($searchtype =~ m/[^a-z]/) {
 937                         die_error(400, "Invalid searchtype parameter");
 938                 }
 939         }
 940
 941         our $search_use_regexp = $input_params{'search_use_regexp'};
 942
 943         our $searchtext = $input_params{'searchtext'};
 944         our $search_regexp;
 945         if (defined $searchtext) {
 946                 if (length($searchtext) < 2) {
 947                         die_error(403, "At least two characters are required for search parameter");
 948                 }
 949                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 950         }
 951 }
 952
 953 # path to the current git repository
 954 our $git_dir;
 955 sub evaluate_git_dir {
 956         our $git_dir = "$projectroot/$project" if $project;
 957 }
 958
 959 our (@snapshot_fmts, $git_avatar);
 960 sub configure_gitweb_features {
 961         # list of supported snapshot formats
 962         our @snapshot_fmts = gitweb_get_feature('snapshot');
 963         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 964
 965         # check that the avatar feature is set to a known provider name,
 966         # and for each provider check if the dependencies are satisfied.
 967         # if the provider name is invalid or the dependencies are not met,
 968         # reset $git_avatar to the empty string.
 969         our ($git_avatar) = gitweb_get_feature('avatar');
 970         if ($git_avatar eq 'gravatar') {
 971                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 972         } elsif ($git_avatar eq 'picon') {
 973                 # no dependencies
 974         } else {
 975                 $git_avatar = '';
 976         }
 977 }
 978
 979 # dispatch
 980 sub dispatch {
 981         if (!defined $action) {
 982                 if (defined $hash) {
 983                         $action = git_get_type($hash);
 984                 } elsif (defined $hash_base && defined $file_name) {
 985                         $action = git_get_type("$hash_base:$file_name");
 986                 } elsif (defined $project) {
 987                         $action = 'summary';
 988                 } else {
 989                         $action = 'project_list';
 990                 }
 991         }
 992         if (!defined($actions{$action})) {
 993                 die_error(400, "Unknown action");
 994         }
 995         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 996             !$project) {
 997                 die_error(400, "Project needed");
 998         }
 999         $actions{$action}->();
1000 }
1001
1002 sub run {
1003         our $t0 = [Time::HiRes::gettimeofday()]
1004                 if defined $t0;
1005
1006         evaluate_uri();
1007         evaluate_gitweb_config();
1008         evaluate_git_version();
1009         check_loadavg();
1010
1011         # $projectroot and $projects_list might be set in gitweb config file
1012         $projects_list ||= $projectroot;
1013
1014         evaluate_query_params();
1015         evaluate_path_info();
1016         evaluate_and_validate_params();
1017         evaluate_git_dir();
1018
1019         configure_gitweb_features();
1020
1021         dispatch();
1022
1023  DONE_GITWEB:
1024         1;
1025 }
1026 our $cgi = CGI->new();
1027 run();
1028
1029 ## ======================================================================
1030 ## action links
1031
1032 # possible values of extra options
1033 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1034 # -replay => 1      - start from a current view (replay with modifications)
1035 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1036 sub href {
1037         my %params = @_;
1038         # default is to use -absolute url() i.e. $my_uri
1039         my $href = $params{-full} ? $my_url : $my_uri;
1040
1041         $params{'project'} = $project unless exists $params{'project'};
1042
1043         if ($params{-replay}) {
1044                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1045                         if (!exists $params{$name}) {
1046                                 $params{$name} = $input_params{$name};
1047                         }
1048                 }
1049         }
1050
1051         my $use_pathinfo = gitweb_check_feature('pathinfo');
1052         if (defined $params{'project'} &&
1053             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1054                 # try to put as many parameters as possible in PATH_INFO:
1055                 #   - project name
1056                 #   - action
1057                 #   - hash_parent or hash_parent_base:/file_parent
1058                 #   - hash or hash_base:/filename
1059                 #   - the snapshot_format as an appropriate suffix
1060
1061                 # When the script is the root DirectoryIndex for the domain,
1062                 # $href here would be something like http://gitweb.example.com/
1063                 # Thus, we strip any trailing / from $href, to spare us double
1064                 # slashes in the final URL
1065                 $href =~ s,/$,,;
1066
1067                 # Then add the project name, if present
1068                 $href .= "/".esc_url($params{'project'});
1069                 delete $params{'project'};
1070
1071                 # since we destructively absorb parameters, we keep this
1072                 # boolean that remembers if we're handling a snapshot
1073                 my $is_snapshot = $params{'action'} eq 'snapshot';
1074
1075                 # Summary just uses the project path URL, any other action is
1076                 # added to the URL
1077                 if (defined $params{'action'}) {
1078                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1079                         delete $params{'action'};
1080                 }
1081
1082                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1083                 # stripping nonexistent or useless pieces
1084                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1085                         || $params{'hash_parent'} || $params{'hash'});
1086                 if (defined $params{'hash_base'}) {
1087                         if (defined $params{'hash_parent_base'}) {
1088                                 $href .= esc_url($params{'hash_parent_base'});
1089                                 # skip the file_parent if it's the same as the file_name
1090                                 if (defined $params{'file_parent'}) {
1091                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1092                                                 delete $params{'file_parent'};
1093                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1094                                                 $href .= ":/".esc_url($params{'file_parent'});
1095                                                 delete $params{'file_parent'};
1096                                         }
1097                                 }
1098                                 $href .= "..";
1099                                 delete $params{'hash_parent'};
1100                                 delete $params{'hash_parent_base'};
1101                         } elsif (defined $params{'hash_parent'}) {
1102                                 $href .= esc_url($params{'hash_parent'}). "..";
1103                                 delete $params{'hash_parent'};
1104                         }
1105
1106                         $href .= esc_url($params{'hash_base'});
1107                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1108                                 $href .= ":/".esc_url($params{'file_name'});
1109                                 delete $params{'file_name'};
1110                         }
1111                         delete $params{'hash'};
1112                         delete $params{'hash_base'};
1113                 } elsif (defined $params{'hash'}) {
1114                         $href .= esc_url($params{'hash'});
1115                         delete $params{'hash'};
1116                 }
1117
1118                 # If the action was a snapshot, we can absorb the
1119                 # snapshot_format parameter too
1120                 if ($is_snapshot) {
1121                         my $fmt = $params{'snapshot_format'};
1122                         # snapshot_format should always be defined when href()
1123                         # is called, but just in case some code forgets, we
1124                         # fall back to the default
1125                         $fmt ||= $snapshot_fmts[0];
1126                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1127                         delete $params{'snapshot_format'};
1128                 }
1129         }
1130
1131         # now encode the parameters explicitly
1132         my @result = ();
1133         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1134                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1135                 if (defined $params{$name}) {
1136                         if (ref($params{$name}) eq "ARRAY") {
1137                                 foreach my $par (@{$params{$name}}) {
1138                                         push @result, $symbol . "=" . esc_param($par);
1139                                 }
1140                         } else {
1141                                 push @result, $symbol . "=" . esc_param($params{$name});
1142                         }
1143                 }
1144         }
1145         $href .= "?" . join(';', @result) if scalar @result;
1146
1147         return $href;
1148 }
1149
1150
1151 ## ======================================================================
1152 ## validation, quoting/unquoting and escaping
1153
1154 sub validate_action {
1155         my $input = shift || return undef;
1156         return undef unless exists $actions{$input};
1157         return $input;
1158 }
1159
1160 sub validate_project {
1161         my $input = shift || return undef;
1162         if (!validate_pathname($input) ||
1163                 !(-d "$projectroot/$input") ||
1164                 !check_export_ok("$projectroot/$input") ||
1165                 ($strict_export && !project_in_list($input))) {
1166                 return undef;
1167         } else {
1168                 return $input;
1169         }
1170 }
1171
1172 sub validate_pathname {
1173         my $input = shift || return undef;
1174
1175         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1176         # at the beginning, at the end, and between slashes.
1177         # also this catches doubled slashes
1178         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1179                 return undef;
1180         }
1181         # no null characters
1182         if ($input =~ m!\0!) {
1183                 return undef;
1184         }
1185         return $input;
1186 }
1187
1188 sub validate_refname {
1189         my $input = shift || return undef;
1190
1191         # textual hashes are O.K.
1192         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1193                 return $input;
1194         }
1195         # it must be correct pathname
1196         $input = validate_pathname($input)
1197                 or return undef;
1198         # restrictions on ref name according to git-check-ref-format
1199         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1200                 return undef;
1201         }
1202         return $input;
1203 }
1204
1205 # decode sequences of octets in utf8 into Perl's internal form,
1206 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1207 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1208 sub to_utf8 {
1209         my $str = shift;
1210         return undef unless defined $str;
1211         if (utf8::valid($str)) {
1212                 utf8::decode($str);
1213                 return $str;
1214         } else {
1215                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1216         }
1217 }
1218
1219 # quote unsafe chars, but keep the slash, even when it's not
1220 # correct, but quoted slashes look too horrible in bookmarks
1221 sub esc_param {
1222         my $str = shift;
1223         return undef unless defined $str;
1224         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1225         $str =~ s/ /\+/g;
1226         return $str;
1227 }
1228
1229 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1230 sub esc_url {
1231         my $str = shift;
1232         return undef unless defined $str;
1233         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1234         $str =~ s/\+/%2B/g;
1235         $str =~ s/ /\+/g;
1236         return $str;
1237 }
1238
1239 # replace invalid utf8 character with SUBSTITUTION sequence
1240 sub esc_html {
1241         my $str = shift;
1242         my %opts = @_;
1243
1244         return undef unless defined $str;
1245
1246         $str = to_utf8($str);
1247         $str = $cgi->escapeHTML($str);
1248         if ($opts{'-nbsp'}) {
1249                 $str =~ s/ /&nbsp;/g;
1250         }
1251         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1252         return $str;
1253 }
1254
1255 # quote control characters and escape filename to HTML
1256 sub esc_path {
1257         my $str = shift;
1258         my %opts = @_;
1259
1260         return undef unless defined $str;
1261
1262         $str = to_utf8($str);
1263         $str = $cgi->escapeHTML($str);
1264         if ($opts{'-nbsp'}) {
1265                 $str =~ s/ /&nbsp;/g;
1266         }
1267         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1268         return $str;
1269 }
1270
1271 # Make control characters "printable", using character escape codes (CEC)
1272 sub quot_cec {
1273         my $cntrl = shift;
1274         my %opts = @_;
1275         my %es = ( # character escape codes, aka escape sequences
1276                 "\t" => '\t',   # tab            (HT)
1277                 "\n" => '\n',   # line feed      (LF)
1278                 "\r" => '\r',   # carrige return (CR)
1279                 "\f" => '\f',   # form feed      (FF)
1280                 "\b" => '\b',   # backspace      (BS)
1281                 "\a" => '\a',   # alarm (bell)   (BEL)
1282                 "\e" => '\e',   # escape         (ESC)
1283                 "\013" => '\v', # vertical tab   (VT)
1284                 "\000" => '\0', # nul character  (NUL)
1285         );
1286         my $chr = ( (exists $es{$cntrl})
1287                     ? $es{$cntrl}
1288                     : sprintf('\%2x', ord($cntrl)) );
1289         if ($opts{-nohtml}) {
1290                 return $chr;
1291         } else {
1292                 return "<span class=\"cntrl\">$chr</span>";
1293         }
1294 }
1295
1296 # Alternatively use unicode control pictures codepoints,
1297 # Unicode "printable representation" (PR)
1298 sub quot_upr {
1299         my $cntrl = shift;
1300         my %opts = @_;
1301
1302         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1303         if ($opts{-nohtml}) {
1304                 return $chr;
1305         } else {
1306                 return "<span class=\"cntrl\">$chr</span>";
1307         }
1308 }
1309
1310 # git may return quoted and escaped filenames
1311 sub unquote {
1312         my $str = shift;
1313
1314         sub unq {
1315                 my $seq = shift;
1316                 my %es = ( # character escape codes, aka escape sequences
1317                         't' => "\t",   # tab            (HT, TAB)
1318                         'n' => "\n",   # newline        (NL)
1319                         'r' => "\r",   # return         (CR)
1320                         'f' => "\f",   # form feed      (FF)
1321                         'b' => "\b",   # backspace      (BS)
1322                         'a' => "\a",   # alarm (bell)   (BEL)
1323                         'e' => "\e",   # escape         (ESC)
1324                         'v' => "\013", # vertical tab   (VT)
1325                 );
1326
1327                 if ($seq =~ m/^[0-7]{1,3}$/) {
1328                         # octal char sequence
1329                         return chr(oct($seq));
1330                 } elsif (exists $es{$seq}) {
1331                         # C escape sequence, aka character escape code
1332                         return $es{$seq};
1333                 }
1334                 # quoted ordinary character
1335                 return $seq;
1336         }
1337
1338         if ($str =~ m/^"(.*)"$/) {
1339                 # needs unquoting
1340                 $str = $1;
1341                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1342         }
1343         return $str;
1344 }
1345
1346 # escape tabs (convert tabs to spaces)
1347 sub untabify {
1348         my $line = shift;
1349
1350         while ((my $pos = index($line, "\t")) != -1) {
1351                 if (my $count = (8 - ($pos % 8))) {
1352                         my $spaces = ' ' x $count;
1353                         $line =~ s/\t/$spaces/;
1354                 }
1355         }
1356
1357         return $line;
1358 }
1359
1360 sub project_in_list {
1361         my $project = shift;
1362         my @list = git_get_projects_list();
1363         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1364 }
1365
1366 ## ----------------------------------------------------------------------
1367 ## HTML aware string manipulation
1368
1369 # Try to chop given string on a word boundary between position
1370 # $len and $len+$add_len. If there is no word boundary there,
1371 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1372 # (marking chopped part) would be longer than given string.
1373 sub chop_str {
1374         my $str = shift;
1375         my $len = shift;
1376         my $add_len = shift || 10;
1377         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1378
1379         # Make sure perl knows it is utf8 encoded so we don't
1380         # cut in the middle of a utf8 multibyte char.
1381         $str = to_utf8($str);
1382
1383         # allow only $len chars, but don't cut a word if it would fit in $add_len
1384         # if it doesn't fit, cut it if it's still longer than the dots we would add
1385         # remove chopped character entities entirely
1386
1387         # when chopping in the middle, distribute $len into left and right part
1388         # return early if chopping wouldn't make string shorter
1389         if ($where eq 'center') {
1390                 return $str if ($len + 5 >= length($str)); # filler is length 5
1391                 $len = int($len/2);
1392         } else {
1393                 return $str if ($len + 4 >= length($str)); # filler is length 4
1394         }
1395
1396         # regexps: ending and beginning with word part up to $add_len
1397         my $endre = qr/.{$len}\w{0,$add_len}/;
1398         my $begre = qr/\w{0,$add_len}.{$len}/;
1399
1400         if ($where eq 'left') {
1401                 $str =~ m/^(.*?)($begre)$/;
1402                 my ($lead, $body) = ($1, $2);
1403                 if (length($lead) > 4) {
1404                         $lead = " ...";
1405                 }
1406                 return "$lead$body";
1407
1408         } elsif ($where eq 'center') {
1409                 $str =~ m/^($endre)(.*)$/;
1410                 my ($left, $str)  = ($1, $2);
1411                 $str =~ m/^(.*?)($begre)$/;
1412                 my ($mid, $right) = ($1, $2);
1413                 if (length($mid) > 5) {
1414                         $mid = " ... ";
1415                 }
1416                 return "$left$mid$right";
1417
1418         } else {
1419                 $str =~ m/^($endre)(.*)$/;
1420                 my $body = $1;
1421                 my $tail = $2;
1422                 if (length($tail) > 4) {
1423                         $tail = "... ";
1424                 }
1425                 return "$body$tail";
1426         }
1427 }
1428
1429 # takes the same arguments as chop_str, but also wraps a <span> around the
1430 # result with a title attribute if it does get chopped. Additionally, the
1431 # string is HTML-escaped.
1432 sub chop_and_escape_str {
1433         my ($str) = @_;
1434
1435         my $chopped = chop_str(@_);
1436         if ($chopped eq $str) {
1437                 return esc_html($chopped);
1438         } else {
1439                 $str =~ s/[[:cntrl:]]/?/g;
1440                 return $cgi->span({-title=>$str}, esc_html($chopped));
1441         }
1442 }
1443
1444 ## ----------------------------------------------------------------------
1445 ## functions returning short strings
1446
1447 # CSS class for given age value (in seconds)
1448 sub age_class {
1449         my $age = shift;
1450
1451         if (!defined $age) {
1452                 return "noage";
1453         } elsif ($age < 60*60*2) {
1454                 return "age0";
1455         } elsif ($age < 60*60*24*2) {
1456                 return "age1";
1457         } else {
1458                 return "age2";
1459         }
1460 }
1461
1462 # convert age in seconds to "nn units ago" string
1463 sub age_string {
1464         my $age = shift;
1465         my $age_str;
1466
1467         if ($age > 60*60*24*365*2) {
1468                 $age_str = (int $age/60/60/24/365);
1469                 $age_str .= " years ago";
1470         } elsif ($age > 60*60*24*(365/12)*2) {
1471                 $age_str = int $age/60/60/24/(365/12);
1472                 $age_str .= " months ago";
1473         } elsif ($age > 60*60*24*7*2) {
1474                 $age_str = int $age/60/60/24/7;
1475                 $age_str .= " weeks ago";
1476         } elsif ($age > 60*60*24*2) {
1477                 $age_str = int $age/60/60/24;
1478                 $age_str .= " days ago";
1479         } elsif ($age > 60*60*2) {
1480                 $age_str = int $age/60/60;
1481                 $age_str .= " hours ago";
1482         } elsif ($age > 60*2) {
1483                 $age_str = int $age/60;
1484                 $age_str .= " min ago";
1485         } elsif ($age > 2) {
1486                 $age_str = int $age;
1487                 $age_str .= " sec ago";
1488         } else {
1489                 $age_str .= " right now";
1490         }
1491         return $age_str;
1492 }
1493
1494 use constant {
1495         S_IFINVALID => 0030000,
1496         S_IFGITLINK => 0160000,
1497 };
1498
1499 # submodule/subproject, a commit object reference
1500 sub S_ISGITLINK {
1501         my $mode = shift;
1502
1503         return (($mode & S_IFMT) == S_IFGITLINK)
1504 }
1505
1506 # convert file mode in octal to symbolic file mode string
1507 sub mode_str {
1508         my $mode = oct shift;
1509
1510         if (S_ISGITLINK($mode)) {
1511                 return 'm---------';
1512         } elsif (S_ISDIR($mode & S_IFMT)) {
1513                 return 'drwxr-xr-x';
1514         } elsif (S_ISLNK($mode)) {
1515                 return 'lrwxrwxrwx';
1516         } elsif (S_ISREG($mode)) {
1517                 # git cares only about the executable bit
1518                 if ($mode & S_IXUSR) {
1519                         return '-rwxr-xr-x';
1520                 } else {
1521                         return '-rw-r--r--';
1522                 };
1523         } else {
1524                 return '----------';
1525         }
1526 }
1527
1528 # convert file mode in octal to file type string
1529 sub file_type {
1530         my $mode = shift;
1531
1532         if ($mode !~ m/^[0-7]+$/) {
1533                 return $mode;
1534         } else {
1535                 $mode = oct $mode;
1536         }
1537
1538         if (S_ISGITLINK($mode)) {
1539                 return "submodule";
1540         } elsif (S_ISDIR($mode & S_IFMT)) {
1541                 return "directory";
1542         } elsif (S_ISLNK($mode)) {
1543                 return "symlink";
1544         } elsif (S_ISREG($mode)) {
1545                 return "file";
1546         } else {
1547                 return "unknown";
1548         }
1549 }
1550
1551 # convert file mode in octal to file type description string
1552 sub file_type_long {
1553         my $mode = shift;
1554
1555         if ($mode !~ m/^[0-7]+$/) {
1556                 return $mode;
1557         } else {
1558                 $mode = oct $mode;
1559         }
1560
1561         if (S_ISGITLINK($mode)) {
1562                 return "submodule";
1563         } elsif (S_ISDIR($mode & S_IFMT)) {
1564                 return "directory";
1565         } elsif (S_ISLNK($mode)) {
1566                 return "symlink";
1567         } elsif (S_ISREG($mode)) {
1568                 if ($mode & S_IXUSR) {
1569                         return "executable";
1570                 } else {
1571                         return "file";
1572                 };
1573         } else {
1574                 return "unknown";
1575         }
1576 }
1577
1578
1579 ## ----------------------------------------------------------------------
1580 ## functions returning short HTML fragments, or transforming HTML fragments
1581 ## which don't belong to other sections
1582
1583 # format line of commit message.
1584 sub format_log_line_html {
1585         my $line = shift;
1586
1587         $line = esc_html($line, -nbsp=>1);
1588         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1589                 $cgi->a({-href => href(action=>"object", hash=>$1),
1590                                         -class => "text"}, $1);
1591         }eg;
1592
1593         return $line;
1594 }
1595
1596 # format marker of refs pointing to given object
1597
1598 # the destination action is chosen based on object type and current context:
1599 # - for annotated tags, we choose the tag view unless it's the current view
1600 #   already, in which case we go to shortlog view
1601 # - for other refs, we keep the current view if we're in history, shortlog or
1602 #   log view, and select shortlog otherwise
1603 sub format_ref_marker {
1604         my ($refs, $id) = @_;
1605         my $markers = '';
1606
1607         if (defined $refs->{$id}) {
1608                 foreach my $ref (@{$refs->{$id}}) {
1609                         # this code exploits the fact that non-lightweight tags are the
1610                         # only indirect objects, and that they are the only objects for which
1611                         # we want to use tag instead of shortlog as action
1612                         my ($type, $name) = qw();
1613                         my $indirect = ($ref =~ s/\^\{\}$//);
1614                         # e.g. tags/v2.6.11 or heads/next
1615                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1616                                 $type = $1;
1617                                 $name = $2;
1618                         } else {
1619                                 $type = "ref";
1620                                 $name = $ref;
1621                         }
1622
1623                         my $class = $type;
1624                         $class .= " indirect" if $indirect;
1625
1626                         my $dest_action = "shortlog";
1627
1628                         if ($indirect) {
1629                                 $dest_action = "tag" unless $action eq "tag";
1630                         } elsif ($action =~ /^(history|(short)?log)$/) {
1631                                 $dest_action = $action;
1632                         }
1633
1634                         my $dest = "";
1635                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1636                         $dest .= $ref;
1637
1638                         my $link = $cgi->a({
1639                                 -href => href(
1640                                         action=>$dest_action,
1641                                         hash=>$dest
1642                                 )}, $name);
1643
1644                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1645                                 $link . "</span>";
1646                 }
1647         }
1648
1649         if ($markers) {
1650                 return ' <span class="refs">'. $markers . '</span>';
1651         } else {
1652                 return "";
1653         }
1654 }
1655
1656 # format, perhaps shortened and with markers, title line
1657 sub format_subject_html {
1658         my ($long, $short, $href, $extra) = @_;
1659         $extra = '' unless defined($extra);
1660
1661         if (length($short) < length($long)) {
1662                 $long =~ s/[[:cntrl:]]/?/g;
1663                 return $cgi->a({-href => $href, -class => "list subject",
1664                                 -title => to_utf8($long)},
1665                        esc_html($short)) . $extra;
1666         } else {
1667                 return $cgi->a({-href => $href, -class => "list subject"},
1668                        esc_html($long)) . $extra;
1669         }
1670 }
1671
1672 # Rather than recomputing the url for an email multiple times, we cache it
1673 # after the first hit. This gives a visible benefit in views where the avatar
1674 # for the same email is used repeatedly (e.g. shortlog).
1675 # The cache is shared by all avatar engines (currently gravatar only), which
1676 # are free to use it as preferred. Since only one avatar engine is used for any
1677 # given page, there's no risk for cache conflicts.
1678 our %avatar_cache = ();
1679
1680 # Compute the picon url for a given email, by using the picon search service over at
1681 # http://www.cs.indiana.edu/picons/search.html
1682 sub picon_url {
1683         my $email = lc shift;
1684         if (!$avatar_cache{$email}) {
1685                 my ($user, $domain) = split('@', $email);
1686                 $avatar_cache{$email} =
1687                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1688                         "$domain/$user/" .
1689                         "users+domains+unknown/up/single";
1690         }
1691         return $avatar_cache{$email};
1692 }
1693
1694 # Compute the gravatar url for a given email, if it's not in the cache already.
1695 # Gravatar stores only the part of the URL before the size, since that's the
1696 # one computationally more expensive. This also allows reuse of the cache for
1697 # different sizes (for this particular engine).
1698 sub gravatar_url {
1699         my $email = lc shift;
1700         my $size = shift;
1701         $avatar_cache{$email} ||=
1702                 "http://www.gravatar.com/avatar/" .
1703                         Digest::MD5::md5_hex($email) . "?s=";
1704         return $avatar_cache{$email} . $size;
1705 }
1706
1707 # Insert an avatar for the given $email at the given $size if the feature
1708 # is enabled.
1709 sub git_get_avatar {
1710         my ($email, %opts) = @_;
1711         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1712         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1713         $opts{-size} ||= 'default';
1714         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1715         my $url = "";
1716         if ($git_avatar eq 'gravatar') {
1717                 $url = gravatar_url($email, $size);
1718         } elsif ($git_avatar eq 'picon') {
1719                 $url = picon_url($email);
1720         }
1721         # Other providers can be added by extending the if chain, defining $url
1722         # as needed. If no variant puts something in $url, we assume avatars
1723         # are completely disabled/unavailable.
1724         if ($url) {
1725                 return $pre_white .
1726                        "<img width=\"$size\" " .
1727                             "class=\"avatar\" " .
1728                             "src=\"$url\" " .
1729                             "alt=\"\" " .
1730                        "/>" . $post_white;
1731         } else {
1732                 return "";
1733         }
1734 }
1735
1736 sub format_search_author {
1737         my ($author, $searchtype, $displaytext) = @_;
1738         my $have_search = gitweb_check_feature('search');
1739
1740         if ($have_search) {
1741                 my $performed = "";
1742                 if ($searchtype eq 'author') {
1743                         $performed = "authored";
1744                 } elsif ($searchtype eq 'committer') {
1745                         $performed = "committed";
1746                 }
1747
1748                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1749                                 searchtext=>$author,
1750                                 searchtype=>$searchtype), class=>"list",
1751                                 title=>"Search for commits $performed by $author"},
1752                                 $displaytext);
1753
1754         } else {
1755                 return $displaytext;
1756         }
1757 }
1758
1759 # format the author name of the given commit with the given tag
1760 # the author name is chopped and escaped according to the other
1761 # optional parameters (see chop_str).
1762 sub format_author_html {
1763         my $tag = shift;
1764         my $co = shift;
1765         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1766         return "<$tag class=\"author\">" .
1767                format_search_author($co->{'author_name'}, "author",
1768                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1769                        $author) .
1770                "</$tag>";
1771 }
1772
1773 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1774 sub format_git_diff_header_line {
1775         my $line = shift;
1776         my $diffinfo = shift;
1777         my ($from, $to) = @_;
1778
1779         if ($diffinfo->{'nparents'}) {
1780                 # combined diff
1781                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1782                 if ($to->{'href'}) {
1783                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1784                                          esc_path($to->{'file'}));
1785                 } else { # file was deleted (no href)
1786                         $line .= esc_path($to->{'file'});
1787                 }
1788         } else {
1789                 # "ordinary" diff
1790                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1791                 if ($from->{'href'}) {
1792                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1793                                          'a/' . esc_path($from->{'file'}));
1794                 } else { # file was added (no href)
1795                         $line .= 'a/' . esc_path($from->{'file'});
1796                 }
1797                 $line .= ' ';
1798                 if ($to->{'href'}) {
1799                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1800                                          'b/' . esc_path($to->{'file'}));
1801                 } else { # file was deleted
1802                         $line .= 'b/' . esc_path($to->{'file'});
1803                 }
1804         }
1805
1806         return "<div class=\"diff header\">$line</div>\n";
1807 }
1808
1809 # format extended diff header line, before patch itself
1810 sub format_extended_diff_header_line {
1811         my $line = shift;
1812         my $diffinfo = shift;
1813         my ($from, $to) = @_;
1814
1815         # match <path>
1816         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1817                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1818                                        esc_path($from->{'file'}));
1819         }
1820         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1821                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1822                                  esc_path($to->{'file'}));
1823         }
1824         # match single <mode>
1825         if ($line =~ m/\s(\d{6})$/) {
1826                 $line .= '<span class="info"> (' .
1827                          file_type_long($1) .
1828                          ')</span>';
1829         }
1830         # match <hash>
1831         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1832                 # can match only for combined diff
1833                 $line = 'index ';
1834                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1835                         if ($from->{'href'}[$i]) {
1836                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1837                                                   -class=>"hash"},
1838                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1839                         } else {
1840                                 $line .= '0' x 7;
1841                         }
1842                         # separator
1843                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1844                 }
1845                 $line .= '..';
1846                 if ($to->{'href'}) {
1847                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1848                                          substr($diffinfo->{'to_id'},0,7));
1849                 } else {
1850                         $line .= '0' x 7;
1851                 }
1852
1853         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1854                 # can match only for ordinary diff
1855                 my ($from_link, $to_link);
1856                 if ($from->{'href'}) {
1857                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1858                                              substr($diffinfo->{'from_id'},0,7));
1859                 } else {
1860                         $from_link = '0' x 7;
1861                 }
1862                 if ($to->{'href'}) {
1863                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1864                                            substr($diffinfo->{'to_id'},0,7));
1865                 } else {
1866                         $to_link = '0' x 7;
1867                 }
1868                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1869                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1870         }
1871
1872         return $line . "<br/>\n";
1873 }
1874
1875 # format from-file/to-file diff header
1876 sub format_diff_from_to_header {
1877         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1878         my $line;
1879         my $result = '';
1880
1881         $line = $from_line;
1882         #assert($line =~ m/^---/) if DEBUG;
1883         # no extra formatting for "^--- /dev/null"
1884         if (! $diffinfo->{'nparents'}) {
1885                 # ordinary (single parent) diff
1886                 if ($line =~ m!^--- "?a/!) {
1887                         if ($from->{'href'}) {
1888                                 $line = '--- a/' .
1889                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1890                                                 esc_path($from->{'file'}));
1891                         } else {
1892                                 $line = '--- a/' .
1893                                         esc_path($from->{'file'});
1894                         }
1895                 }
1896                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1897
1898         } else {
1899                 # combined diff (merge commit)
1900                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1901                         if ($from->{'href'}[$i]) {
1902                                 $line = '--- ' .
1903                                         $cgi->a({-href=>href(action=>"blobdiff",
1904                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1905                                                              hash_parent_base=>$parents[$i],
1906                                                              file_parent=>$from->{'file'}[$i],
1907                                                              hash=>$diffinfo->{'to_id'},
1908                                                              hash_base=>$hash,
1909                                                              file_name=>$to->{'file'}),
1910                                                  -class=>"path",
1911                                                  -title=>"diff" . ($i+1)},
1912                                                 $i+1) .
1913                                         '/' .
1914                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1915                                                 esc_path($from->{'file'}[$i]));
1916                         } else {
1917                                 $line = '--- /dev/null';
1918                         }
1919                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1920                 }
1921         }
1922
1923         $line = $to_line;
1924         #assert($line =~ m/^\+\+\+/) if DEBUG;
1925         # no extra formatting for "^+++ /dev/null"
1926         if ($line =~ m!^\+\+\+ "?b/!) {
1927                 if ($to->{'href'}) {
1928                         $line = '+++ b/' .
1929                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1930                                         esc_path($to->{'file'}));
1931                 } else {
1932                         $line = '+++ b/' .
1933                                 esc_path($to->{'file'});
1934                 }
1935         }
1936         $result .= qq!<div class="diff to_file">$line</div>\n!;
1937
1938         return $result;
1939 }
1940
1941 # create note for patch simplified by combined diff
1942 sub format_diff_cc_simplified {
1943         my ($diffinfo, @parents) = @_;
1944         my $result = '';
1945
1946         $result .= "<div class=\"diff header\">" .
1947                    "diff --cc ";
1948         if (!is_deleted($diffinfo)) {
1949                 $result .= $cgi->a({-href => href(action=>"blob",
1950                                                   hash_base=>$hash,
1951                                                   hash=>$diffinfo->{'to_id'},
1952                                                   file_name=>$diffinfo->{'to_file'}),
1953                                     -class => "path"},
1954                                    esc_path($diffinfo->{'to_file'}));
1955         } else {
1956                 $result .= esc_path($diffinfo->{'to_file'});
1957         }
1958         $result .= "</div>\n" . # class="diff header"
1959                    "<div class=\"diff nodifferences\">" .
1960                    "Simple merge" .
1961                    "</div>\n"; # class="diff nodifferences"
1962
1963         return $result;
1964 }
1965
1966 # format patch (diff) line (not to be used for diff headers)
1967 sub format_diff_line {
1968         my $line = shift;
1969         my ($from, $to) = @_;
1970         my $diff_class = "";
1971
1972         chomp $line;
1973
1974         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1975                 # combined diff
1976                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1977                 if ($line =~ m/^\@{3}/) {
1978                         $diff_class = " chunk_header";
1979                 } elsif ($line =~ m/^\\/) {
1980                         $diff_class = " incomplete";
1981                 } elsif ($prefix =~ tr/+/+/) {
1982                         $diff_class = " add";
1983                 } elsif ($prefix =~ tr/-/-/) {
1984                         $diff_class = " rem";
1985                 }
1986         } else {
1987                 # assume ordinary diff
1988                 my $char = substr($line, 0, 1);
1989                 if ($char eq '+') {
1990                         $diff_class = " add";
1991                 } elsif ($char eq '-') {
1992                         $diff_class = " rem";
1993                 } elsif ($char eq '@') {
1994                         $diff_class = " chunk_header";
1995                 } elsif ($char eq "\\") {
1996                         $diff_class = " incomplete";
1997                 }
1998         }
1999         $line = untabify($line);
2000         if ($from && $to && $line =~ m/^\@{2} /) {
2001                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2002                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2003
2004                 $from_lines = 0 unless defined $from_lines;
2005                 $to_lines   = 0 unless defined $to_lines;
2006
2007                 if ($from->{'href'}) {
2008                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2009                                              -class=>"list"}, $from_text);
2010                 }
2011                 if ($to->{'href'}) {
2012                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2013                                              -class=>"list"}, $to_text);
2014                 }
2015                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2016                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2017                 return "<div class=\"diff$diff_class\">$line</div>\n";
2018         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2019                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2020                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2021
2022                 @from_text = split(' ', $ranges);
2023                 for (my $i = 0; $i < @from_text; ++$i) {
2024                         ($from_start[$i], $from_nlines[$i]) =
2025                                 (split(',', substr($from_text[$i], 1)), 0);
2026                 }
2027
2028                 $to_text   = pop @from_text;
2029                 $to_start  = pop @from_start;
2030                 $to_nlines = pop @from_nlines;
2031
2032                 $line = "<span class=\"chunk_info\">$prefix ";
2033                 for (my $i = 0; $i < @from_text; ++$i) {
2034                         if ($from->{'href'}[$i]) {
2035                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2036                                                   -class=>"list"}, $from_text[$i]);
2037                         } else {
2038                                 $line .= $from_text[$i];
2039                         }
2040                         $line .= " ";
2041                 }
2042                 if ($to->{'href'}) {
2043                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2044                                           -class=>"list"}, $to_text);
2045                 } else {
2046                         $line .= $to_text;
2047                 }
2048                 $line .= " $prefix</span>" .
2049                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2050                 return "<div class=\"diff$diff_class\">$line</div>\n";
2051         }
2052         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2053 }
2054
2055 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2056 # linked.  Pass the hash of the tree/commit to snapshot.
2057 sub format_snapshot_links {
2058         my ($hash) = @_;
2059         my $num_fmts = @snapshot_fmts;
2060         if ($num_fmts > 1) {
2061                 # A parenthesized list of links bearing format names.
2062                 # e.g. "snapshot (_tar.gz_ _zip_)"
2063                 return "snapshot (" . join(' ', map
2064                         $cgi->a({
2065                                 -href => href(
2066                                         action=>"snapshot",
2067                                         hash=>$hash,
2068                                         snapshot_format=>$_
2069                                 )
2070                         }, $known_snapshot_formats{$_}{'display'})
2071                 , @snapshot_fmts) . ")";
2072         } elsif ($num_fmts == 1) {
2073                 # A single "snapshot" link whose tooltip bears the format name.
2074                 # i.e. "_snapshot_"
2075                 my ($fmt) = @snapshot_fmts;
2076                 return
2077                         $cgi->a({
2078                                 -href => href(
2079                                         action=>"snapshot",
2080                                         hash=>$hash,
2081                                         snapshot_format=>$fmt
2082                                 ),
2083                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2084                         }, "snapshot");
2085         } else { # $num_fmts == 0
2086                 return undef;
2087         }
2088 }
2089
2090 ## ......................................................................
2091 ## functions returning values to be passed, perhaps after some
2092 ## transformation, to other functions; e.g. returning arguments to href()
2093
2094 # returns hash to be passed to href to generate gitweb URL
2095 # in -title key it returns description of link
2096 sub get_feed_info {
2097         my $format = shift || 'Atom';
2098         my %res = (action => lc($format));
2099
2100         # feed links are possible only for project views
2101         return unless (defined $project);
2102         # some views should link to OPML, or to generic project feed,
2103         # or don't have specific feed yet (so they should use generic)
2104         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2105
2106         my $branch;
2107         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2108         # from tag links; this also makes possible to detect branch links
2109         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2110             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2111                 $branch = $1;
2112         }
2113         # find log type for feed description (title)
2114         my $type = 'log';
2115         if (defined $file_name) {
2116                 $type  = "history of $file_name";
2117                 $type .= "/" if ($action eq 'tree');
2118                 $type .= " on '$branch'" if (defined $branch);
2119         } else {
2120                 $type = "log of $branch" if (defined $branch);
2121         }
2122
2123         $res{-title} = $type;
2124         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2125         $res{'file_name'} = $file_name;
2126
2127         return %res;
2128 }
2129
2130 ## ----------------------------------------------------------------------
2131 ## git utility subroutines, invoking git commands
2132
2133 # returns path to the core git executable and the --git-dir parameter as list
2134 sub git_cmd {
2135         $number_of_git_cmds++;
2136         return $GIT, '--git-dir='.$git_dir;
2137 }
2138
2139 # quote the given arguments for passing them to the shell
2140 # quote_command("command", "arg 1", "arg with ' and ! characters")
2141 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2142 # Try to avoid using this function wherever possible.
2143 sub quote_command {
2144         return join(' ',
2145                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2146 }
2147
2148 # get HEAD ref of given project as hash
2149 sub git_get_head_hash {
2150         return git_get_full_hash(shift, 'HEAD');
2151 }
2152
2153 sub git_get_full_hash {
2154         return git_get_hash(@_);
2155 }
2156
2157 sub git_get_short_hash {
2158         return git_get_hash(@_, '--short=7');
2159 }
2160
2161 sub git_get_hash {
2162         my ($project, $hash, @options) = @_;
2163         my $o_git_dir = $git_dir;
2164         my $retval = undef;
2165         $git_dir = "$projectroot/$project";
2166         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2167             '--verify', '-q', @options, $hash) {
2168                 $retval = <$fd>;
2169                 chomp $retval if defined $retval;
2170                 close $fd;
2171         }
2172         if (defined $o_git_dir) {
2173                 $git_dir = $o_git_dir;
2174         }
2175         return $retval;
2176 }
2177
2178 # get type of given object
2179 sub git_get_type {
2180         my $hash = shift;
2181
2182         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2183         my $type = <$fd>;
2184         close $fd or return;
2185         chomp $type;
2186         return $type;
2187 }
2188
2189 # repository configuration
2190 our $config_file = '';
2191 our %config;
2192
2193 # store multiple values for single key as anonymous array reference
2194 # single values stored directly in the hash, not as [ <value> ]
2195 sub hash_set_multi {
2196         my ($hash, $key, $value) = @_;
2197
2198         if (!exists $hash->{$key}) {
2199                 $hash->{$key} = $value;
2200         } elsif (!ref $hash->{$key}) {
2201                 $hash->{$key} = [ $hash->{$key}, $value ];
2202         } else {
2203                 push @{$hash->{$key}}, $value;
2204         }
2205 }
2206
2207 # return hash of git project configuration
2208 # optionally limited to some section, e.g. 'gitweb'
2209 sub git_parse_project_config {
2210         my $section_regexp = shift;
2211         my %config;
2212
2213         local $/ = "\0";
2214
2215         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2216                 or return;
2217
2218         while (my $keyval = <$fh>) {
2219                 chomp $keyval;
2220                 my ($key, $value) = split(/\n/, $keyval, 2);
2221
2222                 hash_set_multi(\%config, $key, $value)
2223                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2224         }
2225         close $fh;
2226
2227         return %config;
2228 }
2229
2230 # convert config value to boolean: 'true' or 'false'
2231 # no value, number > 0, 'true' and 'yes' values are true
2232 # rest of values are treated as false (never as error)
2233 sub config_to_bool {
2234         my $val = shift;
2235
2236         return 1 if !defined $val;             # section.key
2237
2238         # strip leading and trailing whitespace
2239         $val =~ s/^\s+//;
2240         $val =~ s/\s+$//;
2241
2242         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2243                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2244 }
2245
2246 # convert config value to simple decimal number
2247 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2248 # to be multiplied by 1024, 1048576, or 1073741824
2249 sub config_to_int {
2250         my $val = shift;
2251
2252         # strip leading and trailing whitespace
2253         $val =~ s/^\s+//;
2254         $val =~ s/\s+$//;
2255
2256         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2257                 $unit = lc($unit);
2258                 # unknown unit is treated as 1
2259                 return $num * ($unit eq 'g' ? 1073741824 :
2260                                $unit eq 'm' ?    1048576 :
2261                                $unit eq 'k' ?       1024 : 1);
2262         }
2263         return $val;
2264 }
2265
2266 # convert config value to array reference, if needed
2267 sub config_to_multi {
2268         my $val = shift;
2269
2270         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2271 }
2272
2273 sub git_get_project_config {
2274         my ($key, $type) = @_;
2275
2276         return unless defined $git_dir;
2277
2278         # key sanity check
2279         return unless ($key);
2280         $key =~ s/^gitweb\.//;
2281         return if ($key =~ m/\W/);
2282
2283         # type sanity check
2284         if (defined $type) {
2285                 $type =~ s/^--//;
2286                 $type = undef
2287                         unless ($type eq 'bool' || $type eq 'int');
2288         }
2289
2290         # get config
2291         if (!defined $config_file ||
2292             $config_file ne "$git_dir/config") {
2293                 %config = git_parse_project_config('gitweb');
2294                 $config_file = "$git_dir/config";
2295         }
2296
2297         # check if config variable (key) exists
2298         return unless exists $config{"gitweb.$key"};
2299
2300         # ensure given type
2301         if (!defined $type) {
2302                 return $config{"gitweb.$key"};
2303         } elsif ($type eq 'bool') {
2304                 # backward compatibility: 'git config --bool' returns true/false
2305                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2306         } elsif ($type eq 'int') {
2307                 return config_to_int($config{"gitweb.$key"});
2308         }
2309         return $config{"gitweb.$key"};
2310 }
2311
2312 # get hash of given path at given ref
2313 sub git_get_hash_by_path {
2314         my $base = shift;
2315         my $path = shift || return undef;
2316         my $type = shift;
2317
2318         $path =~ s,/+$,,;
2319
2320         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2321                 or die_error(500, "Open git-ls-tree failed");
2322         my $line = <$fd>;
2323         close $fd or return undef;
2324
2325         if (!defined $line) {
2326                 # there is no tree or hash given by $path at $base
2327                 return undef;
2328         }
2329
2330         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2331         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2332         if (defined $type && $type ne $2) {
2333                 # type doesn't match
2334                 return undef;
2335         }
2336         return $3;
2337 }
2338
2339 # get path of entry with given hash at given tree-ish (ref)
2340 # used to get 'from' filename for combined diff (merge commit) for renames
2341 sub git_get_path_by_hash {
2342         my $base = shift || return;
2343         my $hash = shift || return;
2344
2345         local $/ = "\0";
2346
2347         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2348                 or return undef;
2349         while (my $line = <$fd>) {
2350                 chomp $line;
2351
2352                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2353                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2354                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2355                         close $fd;
2356                         return $1;
2357                 }
2358         }
2359         close $fd;
2360         return undef;
2361 }
2362
2363 ## ......................................................................
2364 ## git utility functions, directly accessing git repository
2365
2366 sub git_get_project_description {
2367         my $path = shift;
2368
2369         $git_dir = "$projectroot/$path";
2370         open my $fd, '<', "$git_dir/description"
2371                 or return git_get_project_config('description');
2372         my $descr = <$fd>;
2373         close $fd;
2374         if (defined $descr) {
2375                 chomp $descr;
2376         }
2377         return $descr;
2378 }
2379
2380 sub git_get_project_ctags {
2381         my $path = shift;
2382         my $ctags = {};
2383
2384         $git_dir = "$projectroot/$path";
2385         opendir my $dh, "$git_dir/ctags"
2386                 or return $ctags;
2387         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2388                 open my $ct, '<', $_ or next;
2389                 my $val = <$ct>;
2390                 chomp $val;
2391                 close $ct;
2392                 my $ctag = $_; $ctag =~ s#.*/##;
2393                 $ctags->{$ctag} = $val;
2394         }
2395         closedir $dh;
2396         $ctags;
2397 }
2398
2399 sub git_populate_project_tagcloud {
2400         my $ctags = shift;
2401
2402         # First, merge different-cased tags; tags vote on casing
2403         my %ctags_lc;
2404         foreach (keys %$ctags) {
2405                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2406                 if (not $ctags_lc{lc $_}->{topcount}
2407                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2408                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2409                         $ctags_lc{lc $_}->{topname} = $_;
2410                 }
2411         }
2412
2413         my $cloud;
2414         if (eval { require HTML::TagCloud; 1; }) {
2415                 $cloud = HTML::TagCloud->new;
2416                 foreach (sort keys %ctags_lc) {
2417                         # Pad the title with spaces so that the cloud looks
2418                         # less crammed.
2419                         my $title = $ctags_lc{$_}->{topname};
2420                         $title =~ s/ /&nbsp;/g;
2421                         $title =~ s/^/&nbsp;/g;
2422                         $title =~ s/$/&nbsp;/g;
2423                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2424                 }
2425         } else {
2426                 $cloud = \%ctags_lc;
2427         }
2428         $cloud;
2429 }
2430
2431 sub git_show_project_tagcloud {
2432         my ($cloud, $count) = @_;
2433         print STDERR ref($cloud)."..\n";
2434         if (ref $cloud eq 'HTML::TagCloud') {
2435                 return $cloud->html_and_css($count);
2436         } else {
2437                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2438                 return '<p align="center">' . join (', ', map {
2439                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2440                 } splice(@tags, 0, $count)) . '</p>';
2441         }
2442 }
2443
2444 sub git_get_project_url_list {
2445         my $path = shift;
2446
2447         $git_dir = "$projectroot/$path";
2448         open my $fd, '<', "$git_dir/cloneurl"
2449                 or return wantarray ?
2450                 @{ config_to_multi(git_get_project_config('url')) } :
2451                    config_to_multi(git_get_project_config('url'));
2452         my @git_project_url_list = map { chomp; $_ } <$fd>;
2453         close $fd;
2454
2455         return wantarray ? @git_project_url_list : \@git_project_url_list;
2456 }
2457
2458 sub git_get_projects_list {
2459         my ($filter) = @_;
2460         my @list;
2461
2462         $filter ||= '';
2463         $filter =~ s/\.git$//;
2464
2465         my $check_forks = gitweb_check_feature('forks');
2466
2467         if (-d $projects_list) {
2468                 # search in directory
2469                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2470                 # remove the trailing "/"
2471                 $dir =~ s!/+$!!;
2472                 my $pfxlen = length("$dir");
2473                 my $pfxdepth = ($dir =~ tr!/!!);
2474
2475                 File::Find::find({
2476                         follow_fast => 1, # follow symbolic links
2477                         follow_skip => 2, # ignore duplicates
2478                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2479                         wanted => sub {
2480                                 # skip project-list toplevel, if we get it.
2481                                 return if (m!^[/.]$!);
2482                                 # only directories can be git repositories
2483                                 return unless (-d $_);
2484                                 # don't traverse too deep (Find is super slow on os x)
2485                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2486                                         $File::Find::prune = 1;
2487                                         return;
2488                                 }
2489
2490                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2491                                 # we check related file in $projectroot
2492                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2493                                 if (check_export_ok("$projectroot/$path")) {
2494                                         push @list, { path => $path };
2495                                         $File::Find::prune = 1;
2496                                 }
2497                         },
2498                 }, "$dir");
2499
2500         } elsif (-f $projects_list) {
2501                 # read from file(url-encoded):
2502                 # 'git%2Fgit.git Linus+Torvalds'
2503                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2504                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2505                 my %paths;
2506                 open my $fd, '<', $projects_list or return;
2507         PROJECT:
2508                 while (my $line = <$fd>) {
2509                         chomp $line;
2510                         my ($path, $owner) = split ' ', $line;
2511                         $path = unescape($path);
2512                         $owner = unescape($owner);
2513                         if (!defined $path) {
2514                                 next;
2515                         }
2516                         if ($filter ne '') {
2517                                 # looking for forks;
2518                                 my $pfx = substr($path, 0, length($filter));
2519                                 if ($pfx ne $filter) {
2520                                         next PROJECT;
2521                                 }
2522                                 my $sfx = substr($path, length($filter));
2523                                 if ($sfx !~ /^\/.*\.git$/) {
2524                                         next PROJECT;
2525                                 }
2526                         } elsif ($check_forks) {
2527                         PATH:
2528                                 foreach my $filter (keys %paths) {
2529                                         # looking for forks;
2530                                         my $pfx = substr($path, 0, length($filter));
2531                                         if ($pfx ne $filter) {
2532                                                 next PATH;
2533                                         }
2534                                         my $sfx = substr($path, length($filter));
2535                                         if ($sfx !~ /^\/.*\.git$/) {
2536                                                 next PATH;
2537                                         }
2538                                         # is a fork, don't include it in
2539                                         # the list
2540                                         next PROJECT;
2541                                 }
2542                         }
2543                         if (check_export_ok("$projectroot/$path")) {
2544                                 my $pr = {
2545                                         path => $path,
2546                                         owner => to_utf8($owner),
2547                                 };
2548                                 push @list, $pr;
2549                                 (my $forks_path = $path) =~ s/\.git$//;
2550                                 $paths{$forks_path}++;
2551                         }
2552                 }
2553                 close $fd;
2554         }
2555         return @list;
2556 }
2557
2558 our $gitweb_project_owner = undef;
2559 sub git_get_project_list_from_file {
2560
2561         return if (defined $gitweb_project_owner);
2562
2563         $gitweb_project_owner = {};
2564         # read from file (url-encoded):
2565         # 'git%2Fgit.git Linus+Torvalds'
2566         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2567         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2568         if (-f $projects_list) {
2569                 open(my $fd, '<', $projects_list);
2570                 while (my $line = <$fd>) {
2571                         chomp $line;
2572                         my ($pr, $ow) = split ' ', $line;
2573                         $pr = unescape($pr);
2574                         $ow = unescape($ow);
2575                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2576                 }
2577                 close $fd;
2578         }
2579 }
2580
2581 sub git_get_project_owner {
2582         my $project = shift;
2583         my $owner;
2584
2585         return undef unless $project;
2586         $git_dir = "$projectroot/$project";
2587
2588         if (!defined $gitweb_project_owner) {
2589                 git_get_project_list_from_file();
2590         }
2591
2592         if (exists $gitweb_project_owner->{$project}) {
2593                 $owner = $gitweb_project_owner->{$project};
2594         }
2595         if (!defined $owner){
2596                 $owner = git_get_project_config('owner');
2597         }
2598         if (!defined $owner) {
2599                 $owner = get_file_owner("$git_dir");
2600         }
2601
2602         return $owner;
2603 }
2604
2605 sub git_get_last_activity {
2606         my ($path) = @_;
2607         my $fd;
2608
2609         $git_dir = "$projectroot/$path";
2610         open($fd, "-|", git_cmd(), 'for-each-ref',
2611              '--format=%(committer)',
2612              '--sort=-committerdate',
2613              '--count=1',
2614              'refs/heads') or return;
2615         my $most_recent = <$fd>;
2616         close $fd or return;
2617         if (defined $most_recent &&
2618             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2619                 my $timestamp = $1;
2620                 my $age = time - $timestamp;
2621                 return ($age, age_string($age));
2622         }
2623         return (undef, undef);
2624 }
2625
2626 sub git_get_references {
2627         my $type = shift || "";
2628         my %refs;
2629         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2630         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2631         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2632                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2633                 or return;
2634
2635         while (my $line = <$fd>) {
2636                 chomp $line;
2637                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2638                         if (defined $refs{$1}) {
2639                                 push @{$refs{$1}}, $2;
2640                         } else {
2641                                 $refs{$1} = [ $2 ];
2642                         }
2643                 }
2644         }
2645         close $fd or return;
2646         return \%refs;
2647 }
2648
2649 sub git_get_rev_name_tags {
2650         my $hash = shift || return undef;
2651
2652         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2653                 or return;
2654         my $name_rev = <$fd>;
2655         close $fd;
2656
2657         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2658                 return $1;
2659         } else {
2660                 # catches also '$hash undefined' output
2661                 return undef;
2662         }
2663 }
2664
2665 ## ----------------------------------------------------------------------
2666 ## parse to hash functions
2667
2668 sub parse_date {
2669         my $epoch = shift;
2670         my $tz = shift || "-0000";
2671
2672         my %date;
2673         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2674         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2675         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2676         $date{'hour'} = $hour;
2677         $date{'minute'} = $min;
2678         $date{'mday'} = $mday;
2679         $date{'day'} = $days[$wday];
2680         $date{'month'} = $months[$mon];
2681         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2682                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2683         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2684                              $mday, $months[$mon], $hour ,$min;
2685         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2686                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2687
2688         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2689         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2690         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2691         $date{'hour_local'} = $hour;
2692         $date{'minute_local'} = $min;
2693         $date{'tz_local'} = $tz;
2694         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2695                                   1900+$year, $mon+1, $mday,
2696                                   $hour, $min, $sec, $tz);
2697         return %date;
2698 }
2699
2700 sub parse_tag {
2701         my $tag_id = shift;
2702         my %tag;
2703         my @comment;
2704
2705         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2706         $tag{'id'} = $tag_id;
2707         while (my $line = <$fd>) {
2708                 chomp $line;
2709                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2710                         $tag{'object'} = $1;
2711                 } elsif ($line =~ m/^type (.+)$/) {
2712                         $tag{'type'} = $1;
2713                 } elsif ($line =~ m/^tag (.+)$/) {
2714                         $tag{'name'} = $1;
2715                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2716                         $tag{'author'} = $1;
2717                         $tag{'author_epoch'} = $2;
2718                         $tag{'author_tz'} = $3;
2719                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2720                                 $tag{'author_name'}  = $1;
2721                                 $tag{'author_email'} = $2;
2722                         } else {
2723                                 $tag{'author_name'} = $tag{'author'};
2724                         }
2725                 } elsif ($line =~ m/--BEGIN/) {
2726                         push @comment, $line;
2727                         last;
2728                 } elsif ($line eq "") {
2729                         last;
2730                 }
2731         }
2732         push @comment, <$fd>;
2733         $tag{'comment'} = \@comment;
2734         close $fd or return;
2735         if (!defined $tag{'name'}) {
2736                 return
2737         };
2738         return %tag
2739 }
2740
2741 sub parse_commit_text {
2742         my ($commit_text, $withparents) = @_;
2743         my @commit_lines = split '\n', $commit_text;
2744         my %co;
2745
2746         pop @commit_lines; # Remove '\0'
2747
2748         if (! @commit_lines) {
2749                 return;
2750         }
2751
2752         my $header = shift @commit_lines;
2753         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2754                 return;
2755         }
2756         ($co{'id'}, my @parents) = split ' ', $header;
2757         while (my $line = shift @commit_lines) {
2758                 last if $line eq "\n";
2759                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2760                         $co{'tree'} = $1;
2761                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2762                         push @parents, $1;
2763                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2764                         $co{'author'} = to_utf8($1);
2765                         $co{'author_epoch'} = $2;
2766                         $co{'author_tz'} = $3;
2767                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2768                                 $co{'author_name'}  = $1;
2769                                 $co{'author_email'} = $2;
2770                         } else {
2771                                 $co{'author_name'} = $co{'author'};
2772                         }
2773                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2774                         $co{'committer'} = to_utf8($1);
2775                         $co{'committer_epoch'} = $2;
2776                         $co{'committer_tz'} = $3;
2777                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2778                                 $co{'committer_name'}  = $1;
2779                                 $co{'committer_email'} = $2;
2780                         } else {
2781                                 $co{'committer_name'} = $co{'committer'};
2782                         }
2783                 }
2784         }
2785         if (!defined $co{'tree'}) {
2786                 return;
2787         };
2788         $co{'parents'} = \@parents;
2789         $co{'parent'} = $parents[0];
2790
2791         foreach my $title (@commit_lines) {
2792                 $title =~ s/^    //;
2793                 if ($title ne "") {
2794                         $co{'title'} = chop_str($title, 80, 5);
2795                         # remove leading stuff of merges to make the interesting part visible
2796                         if (length($title) > 50) {
2797                                 $title =~ s/^Automatic //;
2798                                 $title =~ s/^merge (of|with) /Merge ... /i;
2799                                 if (length($title) > 50) {
2800                                         $title =~ s/(http|rsync):\/\///;
2801                                 }
2802                                 if (length($title) > 50) {
2803                                         $title =~ s/(master|www|rsync)\.//;
2804                                 }
2805                                 if (length($title) > 50) {
2806                                         $title =~ s/kernel.org:?//;
2807                                 }
2808                                 if (length($title) > 50) {
2809                                         $title =~ s/\/pub\/scm//;
2810                                 }
2811                         }
2812                         $co{'title_short'} = chop_str($title, 50, 5);
2813                         last;
2814                 }
2815         }
2816         if (! defined $co{'title'} || $co{'title'} eq "") {
2817                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2818         }
2819         # remove added spaces
2820         foreach my $line (@commit_lines) {
2821                 $line =~ s/^    //;
2822         }
2823         $co{'comment'} = \@commit_lines;
2824
2825         my $age = time - $co{'committer_epoch'};
2826         $co{'age'} = $age;
2827         $co{'age_string'} = age_string($age);
2828         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2829         if ($age > 60*60*24*7*2) {
2830                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2831                 $co{'age_string_age'} = $co{'age_string'};
2832         } else {
2833                 $co{'age_string_date'} = $co{'age_string'};
2834                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2835         }
2836         return %co;
2837 }
2838
2839 sub parse_commit {
2840         my ($commit_id) = @_;
2841         my %co;
2842
2843         local $/ = "\0";
2844
2845         open my $fd, "-|", git_cmd(), "rev-list",
2846                 "--parents",
2847                 "--header",
2848                 "--max-count=1",
2849                 $commit_id,
2850                 "--",
2851                 or die_error(500, "Open git-rev-list failed");
2852         %co = parse_commit_text(<$fd>, 1);
2853         close $fd;
2854
2855         return %co;
2856 }
2857
2858 sub parse_commits {
2859         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2860         my @cos;
2861
2862         $maxcount ||= 1;
2863         $skip ||= 0;
2864
2865         local $/ = "\0";
2866
2867         open my $fd, "-|", git_cmd(), "rev-list",
2868                 "--header",
2869                 @args,
2870                 ("--max-count=" . $maxcount),
2871                 ("--skip=" . $skip),
2872                 @extra_options,
2873                 $commit_id,
2874                 "--",
2875                 ($filename ? ($filename) : ())
2876                 or die_error(500, "Open git-rev-list failed");
2877         while (my $line = <$fd>) {
2878                 my %co = parse_commit_text($line);
2879                 push @cos, \%co;
2880         }
2881         close $fd;
2882
2883         return wantarray ? @cos : \@cos;
2884 }
2885
2886 # parse line of git-diff-tree "raw" output
2887 sub parse_difftree_raw_line {
2888         my $line = shift;
2889         my %res;
2890
2891         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2892         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2893         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2894                 $res{'from_mode'} = $1;
2895                 $res{'to_mode'} = $2;
2896                 $res{'from_id'} = $3;
2897                 $res{'to_id'} = $4;
2898                 $res{'status'} = $5;
2899                 $res{'similarity'} = $6;
2900                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2901                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2902                 } else {
2903                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2904                 }
2905         }
2906         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2907         # combined diff (for merge commit)
2908         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2909                 $res{'nparents'}  = length($1);
2910                 $res{'from_mode'} = [ split(' ', $2) ];
2911                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2912                 $res{'from_id'} = [ split(' ', $3) ];
2913                 $res{'to_id'} = pop @{$res{'from_id'}};
2914                 $res{'status'} = [ split('', $4) ];
2915                 $res{'to_file'} = unquote($5);
2916         }
2917         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2918         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2919                 $res{'commit'} = $1;
2920         }
2921
2922         return wantarray ? %res : \%res;
2923 }
2924
2925 # wrapper: return parsed line of git-diff-tree "raw" output
2926 # (the argument might be raw line, or parsed info)
2927 sub parsed_difftree_line {
2928         my $line_or_ref = shift;
2929
2930         if (ref($line_or_ref) eq "HASH") {
2931                 # pre-parsed (or generated by hand)
2932                 return $line_or_ref;
2933         } else {
2934                 return parse_difftree_raw_line($line_or_ref);
2935         }
2936 }
2937
2938 # parse line of git-ls-tree output
2939 sub parse_ls_tree_line {
2940         my $line = shift;
2941         my %opts = @_;
2942         my %res;
2943
2944         if ($opts{'-l'}) {
2945                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2946                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2947
2948                 $res{'mode'} = $1;
2949                 $res{'type'} = $2;
2950                 $res{'hash'} = $3;
2951                 $res{'size'} = $4;
2952                 if ($opts{'-z'}) {
2953                         $res{'name'} = $5;
2954                 } else {
2955                         $res{'name'} = unquote($5);
2956                 }
2957         } else {
2958                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2959                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2960
2961                 $res{'mode'} = $1;
2962                 $res{'type'} = $2;
2963                 $res{'hash'} = $3;
2964                 if ($opts{'-z'}) {
2965                         $res{'name'} = $4;
2966                 } else {
2967                         $res{'name'} = unquote($4);
2968                 }
2969         }
2970
2971         return wantarray ? %res : \%res;
2972 }
2973
2974 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2975 sub parse_from_to_diffinfo {
2976         my ($diffinfo, $from, $to, @parents) = @_;
2977
2978         if ($diffinfo->{'nparents'}) {
2979                 # combined diff
2980                 $from->{'file'} = [];
2981                 $from->{'href'} = [];
2982                 fill_from_file_info($diffinfo, @parents)
2983                         unless exists $diffinfo->{'from_file'};
2984                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2985                         $from->{'file'}[$i] =
2986                                 defined $diffinfo->{'from_file'}[$i] ?
2987                                         $diffinfo->{'from_file'}[$i] :
2988                                         $diffinfo->{'to_file'};
2989                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2990                                 $from->{'href'}[$i] = href(action=>"blob",
2991                                                            hash_base=>$parents[$i],
2992                                                            hash=>$diffinfo->{'from_id'}[$i],
2993                                                            file_name=>$from->{'file'}[$i]);
2994                         } else {
2995                                 $from->{'href'}[$i] = undef;
2996                         }
2997                 }
2998         } else {
2999                 # ordinary (not combined) diff
3000                 $from->{'file'} = $diffinfo->{'from_file'};
3001                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3002                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3003                                                hash=>$diffinfo->{'from_id'},
3004                                                file_name=>$from->{'file'});
3005                 } else {
3006                         delete $from->{'href'};
3007                 }
3008         }
3009
3010         $to->{'file'} = $diffinfo->{'to_file'};
3011         if (!is_deleted($diffinfo)) { # file exists in result
3012                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3013                                      hash=>$diffinfo->{'to_id'},
3014                                      file_name=>$to->{'file'});
3015         } else {
3016                 delete $to->{'href'};
3017         }
3018 }
3019
3020 ## ......................................................................
3021 ## parse to array of hashes functions
3022
3023 sub git_get_heads_list {
3024         my $limit = shift;
3025         my @headslist;
3026
3027         open my $fd, '-|', git_cmd(), 'for-each-ref',
3028                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3029                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3030                 'refs/heads'
3031                 or return;
3032         while (my $line = <$fd>) {
3033                 my %ref_item;
3034
3035                 chomp $line;
3036                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3037                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3038                 my ($committer, $epoch, $tz) =
3039                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3040                 $ref_item{'fullname'}  = $name;
3041                 $name =~ s!^refs/heads/!!;
3042
3043                 $ref_item{'name'}  = $name;
3044                 $ref_item{'id'}    = $hash;
3045                 $ref_item{'title'} = $title || '(no commit message)';
3046                 $ref_item{'epoch'} = $epoch;
3047                 if ($epoch) {
3048                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3049                 } else {
3050                         $ref_item{'age'} = "unknown";
3051                 }
3052
3053                 push @headslist, \%ref_item;
3054         }
3055         close $fd;
3056
3057         return wantarray ? @headslist : \@headslist;
3058 }
3059
3060 sub git_get_tags_list {
3061         my $limit = shift;
3062         my @tagslist;
3063
3064         open my $fd, '-|', git_cmd(), 'for-each-ref',
3065                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3066                 '--format=%(objectname) %(objecttype) %(refname) '.
3067                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3068                 'refs/tags'
3069                 or return;
3070         while (my $line = <$fd>) {
3071                 my %ref_item;
3072
3073                 chomp $line;
3074                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3075                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3076                 my ($creator, $epoch, $tz) =
3077                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3078                 $ref_item{'fullname'} = $name;
3079                 $name =~ s!^refs/tags/!!;
3080
3081                 $ref_item{'type'} = $type;
3082                 $ref_item{'id'} = $id;
3083                 $ref_item{'name'} = $name;
3084                 if ($type eq "tag") {
3085                         $ref_item{'subject'} = $title;
3086                         $ref_item{'reftype'} = $reftype;
3087                         $ref_item{'refid'}   = $refid;
3088                 } else {
3089                         $ref_item{'reftype'} = $type;
3090                         $ref_item{'refid'}   = $id;
3091                 }
3092
3093                 if ($type eq "tag" || $type eq "commit") {
3094                         $ref_item{'epoch'} = $epoch;
3095                         if ($epoch) {
3096                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3097                         } else {
3098                                 $ref_item{'age'} = "unknown";
3099                         }
3100                 }
3101
3102                 push @tagslist, \%ref_item;
3103         }
3104         close $fd;
3105
3106         return wantarray ? @tagslist : \@tagslist;
3107 }
3108
3109 ## ----------------------------------------------------------------------
3110 ## filesystem-related functions
3111
3112 sub get_file_owner {
3113         my $path = shift;
3114
3115         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3116         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3117         if (!defined $gcos) {
3118                 return undef;
3119         }
3120         my $owner = $gcos;
3121         $owner =~ s/[,;].*$//;
3122         return to_utf8($owner);
3123 }
3124
3125 # assume that file exists
3126 sub insert_file {
3127         my $filename = shift;
3128
3129         open my $fd, '<', $filename;
3130         print map { to_utf8($_) } <$fd>;
3131         close $fd;
3132 }
3133
3134 ## ......................................................................
3135 ## mimetype related functions
3136
3137 sub mimetype_guess_file {
3138         my $filename = shift;
3139         my $mimemap = shift;
3140         -r $mimemap or return undef;
3141
3142         my %mimemap;
3143         open(my $mh, '<', $mimemap) or return undef;
3144         while (<$mh>) {
3145                 next if m/^#/; # skip comments
3146                 my ($mimetype, $exts) = split(/\t+/);
3147                 if (defined $exts) {
3148                         my @exts = split(/\s+/, $exts);
3149                         foreach my $ext (@exts) {
3150                                 $mimemap{$ext} = $mimetype;
3151                         }
3152                 }
3153         }
3154         close($mh);
3155
3156         $filename =~ /\.([^.]*)$/;
3157         return $mimemap{$1};
3158 }
3159
3160 sub mimetype_guess {
3161         my $filename = shift;
3162         my $mime;
3163         $filename =~ /\./ or return undef;
3164
3165         if ($mimetypes_file) {
3166                 my $file = $mimetypes_file;
3167                 if ($file !~ m!^/!) { # if it is relative path
3168                         # it is relative to project
3169                         $file = "$projectroot/$project/$file";
3170                 }
3171                 $mime = mimetype_guess_file($filename, $file);
3172         }
3173         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3174         return $mime;
3175 }
3176
3177 sub blob_mimetype {
3178         my $fd = shift;
3179         my $filename = shift;
3180
3181         if ($filename) {
3182                 my $mime = mimetype_guess($filename);
3183                 $mime and return $mime;
3184         }
3185
3186         # just in case
3187         return $default_blob_plain_mimetype unless $fd;
3188
3189         if (-T $fd) {
3190                 return 'text/plain';
3191         } elsif (! $filename) {
3192                 return 'application/octet-stream';
3193         } elsif ($filename =~ m/\.png$/i) {
3194                 return 'image/png';
3195         } elsif ($filename =~ m/\.gif$/i) {
3196                 return 'image/gif';
3197         } elsif ($filename =~ m/\.jpe?g$/i) {
3198                 return 'image/jpeg';
3199         } else {
3200                 return 'application/octet-stream';
3201         }
3202 }
3203
3204 sub blob_contenttype {
3205         my ($fd, $file_name, $type) = @_;
3206
3207         $type ||= blob_mimetype($fd, $file_name);
3208         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3209                 $type .= "; charset=$default_text_plain_charset";
3210         }
3211
3212         return $type;
3213 }
3214
3215 ## ======================================================================
3216 ## functions printing HTML: header, footer, error page
3217
3218 sub git_header_html {
3219         my $status = shift || "200 OK";
3220         my $expires = shift;
3221
3222         my $title = "$site_name";
3223         if (defined $project) {
3224                 $title .= " - " . to_utf8($project);
3225                 if (defined $action) {
3226                         $title .= "/$action";
3227                         if (defined $file_name) {
3228                                 $title .= " - " . esc_path($file_name);
3229                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3230                                         $title .= "/";
3231                                 }
3232                         }
3233                 }
3234         }
3235         my $content_type;
3236         # require explicit support from the UA if we are to send the page as
3237         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3238         # we have to do this because MSIE sometimes globs '*/*', pretending to
3239         # support xhtml+xml but choking when it gets what it asked for.
3240         if (defined $cgi->http('HTTP_ACCEPT') &&
3241             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3242             $cgi->Accept('application/xhtml+xml') != 0) {
3243                 $content_type = 'application/xhtml+xml';
3244         } else {
3245                 $content_type = 'text/html';
3246         }
3247         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3248                            -status=> $status, -expires => $expires);
3249         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3250         print <<EOF;
3251 <?xml version="1.0" encoding="utf-8"?>
3252 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3253 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3254 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3255 <!-- git core binaries version $git_version -->
3256 <head>
3257 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3258 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3259 <meta name="robots" content="index, nofollow"/>
3260 <title>$title</title>
3261 EOF
3262         # the stylesheet, favicon etc urls won't work correctly with path_info
3263         # unless we set the appropriate base URL
3264         if ($ENV{'PATH_INFO'}) {
3265                 print "<base href=\"".esc_url($base_url)."\" />\n";
3266         }
3267         # print out each stylesheet that exist, providing backwards capability
3268         # for those people who defined $stylesheet in a config file
3269         if (defined $stylesheet) {
3270                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3271         } else {
3272                 foreach my $stylesheet (@stylesheets) {
3273                         next unless $stylesheet;
3274                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3275                 }
3276         }
3277         if (defined $project) {
3278                 my %href_params = get_feed_info();
3279                 if (!exists $href_params{'-title'}) {
3280                         $href_params{'-title'} = 'log';
3281                 }
3282
3283                 foreach my $format qw(RSS Atom) {
3284                         my $type = lc($format);
3285                         my %link_attr = (
3286                                 '-rel' => 'alternate',
3287                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3288                                 '-type' => "application/$type+xml"
3289                         );
3290
3291                         $href_params{'action'} = $type;
3292                         $link_attr{'-href'} = href(%href_params);
3293                         print "<link ".
3294                               "rel=\"$link_attr{'-rel'}\" ".
3295                               "title=\"$link_attr{'-title'}\" ".
3296                               "href=\"$link_attr{'-href'}\" ".
3297                               "type=\"$link_attr{'-type'}\" ".
3298                               "/>\n";
3299
3300                         $href_params{'extra_options'} = '--no-merges';
3301                         $link_attr{'-href'} = href(%href_params);
3302                         $link_attr{'-title'} .= ' (no merges)';
3303                         print "<link ".
3304                               "rel=\"$link_attr{'-rel'}\" ".
3305                               "title=\"$link_attr{'-title'}\" ".
3306                               "href=\"$link_attr{'-href'}\" ".
3307                               "type=\"$link_attr{'-type'}\" ".
3308                               "/>\n";
3309                 }
3310
3311         } else {
3312                 printf('<link rel="alternate" title="%s projects list" '.
3313                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3314                        $site_name, href(project=>undef, action=>"project_index"));
3315                 printf('<link rel="alternate" title="%s projects feeds" '.
3316                        'href="%s" type="text/x-opml" />'."\n",
3317                        $site_name, href(project=>undef, action=>"opml"));
3318         }
3319         if (defined $favicon) {
3320                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3321         }
3322
3323         print "</head>\n" .
3324               "<body>\n";
3325
3326         if (defined $site_header && -f $site_header) {
3327                 insert_file($site_header);
3328         }
3329
3330         print "<div class=\"page_header\">\n" .
3331               $cgi->a({-href => esc_url($logo_url),
3332                        -title => $logo_label},
3333                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3334         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3335         if (defined $project) {
3336                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3337                 if (defined $action) {
3338                         print " / $action";
3339                 }
3340                 print "\n";
3341         }
3342         print "</div>\n";
3343
3344         my $have_search = gitweb_check_feature('search');
3345         if (defined $project && $have_search) {
3346                 if (!defined $searchtext) {
3347                         $searchtext = "";
3348                 }
3349                 my $search_hash;
3350                 if (defined $hash_base) {
3351                         $search_hash = $hash_base;
3352                 } elsif (defined $hash) {
3353                         $search_hash = $hash;
3354                 } else {
3355                         $search_hash = "HEAD";
3356                 }
3357                 my $action = $my_uri;
3358                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3359                 if ($use_pathinfo) {
3360                         $action .= "/".esc_url($project);
3361                 }
3362                 print $cgi->startform(-method => "get", -action => $action) .
3363                       "<div class=\"search\">\n" .
3364                       (!$use_pathinfo &&
3365                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3366                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3367                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3368                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3369                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3370                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3371                       " search:\n",
3372                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3373                       "<span title=\"Extended regular expression\">" .
3374                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3375                                      -checked => $search_use_regexp) .
3376                       "</span>" .
3377                       "</div>" .
3378                       $cgi->end_form() . "\n";
3379         }
3380 }
3381
3382 sub git_footer_html {
3383         my $feed_class = 'rss_logo';
3384
3385         print "<div class=\"page_footer\">\n";
3386         if (defined $project) {
3387                 my $descr = git_get_project_description($project);
3388                 if (defined $descr) {
3389                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3390                 }
3391
3392                 my %href_params = get_feed_info();
3393                 if (!%href_params) {
3394                         $feed_class .= ' generic';
3395                 }
3396                 $href_params{'-title'} ||= 'log';
3397
3398                 foreach my $format qw(RSS Atom) {
3399                         $href_params{'action'} = lc($format);
3400                         print $cgi->a({-href => href(%href_params),
3401                                       -title => "$href_params{'-title'} $format feed",
3402                                       -class => $feed_class}, $format)."\n";
3403                 }
3404
3405         } else {
3406                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3407                               -class => $feed_class}, "OPML") . " ";
3408                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3409                               -class => $feed_class}, "TXT") . "\n";
3410         }
3411         print "</div>\n"; # class="page_footer"
3412
3413         if (defined $t0 && gitweb_check_feature('timed')) {
3414                 print "<div id=\"generating_info\">\n";
3415                 print 'This page took '.
3416                       '<span id="generating_time" class="time_span">'.
3417                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3418                       ' seconds </span>'.
3419                       ' and '.
3420                       '<span id="generating_cmd">'.
3421                       $number_of_git_cmds.
3422                       '</span> git commands '.
3423                       " to generate.\n";
3424                 print "</div>\n"; # class="page_footer"
3425         }
3426
3427         if (defined $site_footer && -f $site_footer) {
3428                 insert_file($site_footer);
3429         }
3430
3431         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3432         if (defined $action &&
3433             $action eq 'blame_incremental') {
3434                 print qq!<script type="text/javascript">\n!.
3435                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3436                       qq!           "!. href() .qq!");\n!.
3437                       qq!</script>\n!;
3438         } elsif (gitweb_check_feature('javascript-actions')) {
3439                 print qq!<script type="text/javascript">\n!.
3440                       qq!window.onload = fixLinks;\n!.
3441                       qq!</script>\n!;
3442         }
3443
3444         print "</body>\n" .
3445               "</html>";
3446 }
3447
3448 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3449 # Example: die_error(404, 'Hash not found')
3450 # By convention, use the following status codes (as defined in RFC 2616):
3451 # 400: Invalid or missing CGI parameters, or
3452 #      requested object exists but has wrong type.
3453 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3454 #      this server or project.
3455 # 404: Requested object/revision/project doesn't exist.
3456 # 500: The server isn't configured properly, or
3457 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3458 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3459 # 503: The server is currently unavailable (because it is overloaded,
3460 #      or down for maintenance).  Generally, this is a temporary state.
3461 sub die_error {
3462         my $status = shift || 500;
3463         my $error = esc_html(shift) || "Internal Server Error";
3464         my $extra = shift;
3465
3466         my %http_responses = (
3467                 400 => '400 Bad Request',
3468                 403 => '403 Forbidden',
3469                 404 => '404 Not Found',
3470                 500 => '500 Internal Server Error',
3471                 503 => '503 Service Unavailable',
3472         );
3473         git_header_html($http_responses{$status});
3474         print <<EOF;
3475 <div class="page_body">
3476 <br /><br />
3477 $status - $error
3478 <br />
3479 EOF
3480         if (defined $extra) {
3481                 print "<hr />\n" .
3482                       "$extra\n";
3483         }
3484         print "</div>\n";
3485
3486         git_footer_html();
3487         goto DONE_GITWEB;
3488 }
3489
3490 ## ----------------------------------------------------------------------
3491 ## functions printing or outputting HTML: navigation
3492
3493 sub git_print_page_nav {
3494         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3495         $extra = '' if !defined $extra; # pager or formats
3496
3497         my @navs = qw(summary shortlog log commit commitdiff tree);
3498         if ($suppress) {
3499                 @navs = grep { $_ ne $suppress } @navs;
3500         }
3501
3502         my %arg = map { $_ => {action=>$_} } @navs;
3503         if (defined $head) {
3504                 for (qw(commit commitdiff)) {
3505                         $arg{$_}{'hash'} = $head;
3506                 }
3507                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3508                         for (qw(shortlog log)) {
3509                                 $arg{$_}{'hash'} = $head;
3510                         }
3511                 }
3512         }
3513
3514         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3515         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3516
3517         my @actions = gitweb_get_feature('actions');
3518         my %repl = (
3519                 '%' => '%',
3520                 'n' => $project,         # project name
3521                 'f' => $git_dir,         # project path within filesystem
3522                 'h' => $treehead || '',  # current hash ('h' parameter)
3523                 'b' => $treebase || '',  # hash base ('hb' parameter)
3524         );
3525         while (@actions) {
3526                 my ($label, $link, $pos) = splice(@actions,0,3);
3527                 # insert
3528                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3529                 # munch munch
3530                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3531                 $arg{$label}{'_href'} = $link;
3532         }
3533
3534         print "<div class=\"page_nav\">\n" .
3535                 (join " | ",
3536                  map { $_ eq $current ?
3537                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3538                  } @navs);
3539         print "<br/>\n$extra<br/>\n" .
3540               "</div>\n";
3541 }
3542
3543 sub format_paging_nav {
3544         my ($action, $page, $has_next_link) = @_;
3545         my $paging_nav;
3546
3547
3548         if ($page > 0) {
3549                 $paging_nav .=
3550                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3551                         " &sdot; " .
3552                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3553                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3554         } else {
3555                 $paging_nav .= "first &sdot; prev";
3556         }
3557
3558         if ($has_next_link) {
3559                 $paging_nav .= " &sdot; " .
3560                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3561                                  -accesskey => "n", -title => "Alt-n"}, "next");
3562         } else {
3563                 $paging_nav .= " &sdot; next";
3564         }
3565
3566         return $paging_nav;
3567 }
3568
3569 ## ......................................................................
3570 ## functions printing or outputting HTML: div
3571
3572 sub git_print_header_div {
3573         my ($action, $title, $hash, $hash_base) = @_;
3574         my %args = ();
3575
3576         $args{'action'} = $action;
3577         $args{'hash'} = $hash if $hash;
3578         $args{'hash_base'} = $hash_base if $hash_base;
3579
3580         print "<div class=\"header\">\n" .
3581               $cgi->a({-href => href(%args), -class => "title"},
3582               $title ? $title : $action) .
3583               "\n</div>\n";
3584 }
3585
3586 sub print_local_time {
3587         print format_local_time(@_);
3588 }
3589
3590 sub format_local_time {
3591         my $localtime = '';
3592         my %date = @_;
3593         if ($date{'hour_local'} < 6) {
3594                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3595                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3596         } else {
3597                 $localtime .= sprintf(" (%02d:%02d %s)",
3598                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3599         }
3600
3601         return $localtime;
3602 }
3603
3604 # Outputs the author name and date in long form
3605 sub git_print_authorship {
3606         my $co = shift;
3607         my %opts = @_;
3608         my $tag = $opts{-tag} || 'div';
3609         my $author = $co->{'author_name'};
3610
3611         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3612         print "<$tag class=\"author_date\">" .
3613               format_search_author($author, "author", esc_html($author)) .
3614               " [$ad{'rfc2822'}";
3615         print_local_time(%ad) if ($opts{-localtime});
3616         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3617                   . "</$tag>\n";
3618 }
3619
3620 # Outputs table rows containing the full author or committer information,
3621 # in the format expected for 'commit' view (& similia).
3622 # Parameters are a commit hash reference, followed by the list of people
3623 # to output information for. If the list is empty it defalts to both
3624 # author and committer.
3625 sub git_print_authorship_rows {
3626         my $co = shift;
3627         # too bad we can't use @people = @_ || ('author', 'committer')
3628         my @people = @_;
3629         @people = ('author', 'committer') unless @people;
3630         foreach my $who (@people) {
3631                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3632                 print "<tr><td>$who</td><td>" .
3633                       format_search_author($co->{"${who}_name"}, $who,
3634                                esc_html($co->{"${who}_name"})) . " " .
3635                       format_search_author($co->{"${who}_email"}, $who,
3636                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3637                       "</td><td rowspan=\"2\">" .
3638                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3639                       "</td></tr>\n" .
3640                       "<tr>" .
3641                       "<td></td><td> $wd{'rfc2822'}";
3642                 print_local_time(%wd);
3643                 print "</td>" .
3644                       "</tr>\n";
3645         }
3646 }
3647
3648 sub git_print_page_path {
3649         my $name = shift;
3650         my $type = shift;
3651         my $hb = shift;
3652
3653
3654         print "<div class=\"page_path\">";
3655         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3656                       -title => 'tree root'}, to_utf8("[$project]"));
3657         print " / ";
3658         if (defined $name) {
3659                 my @dirname = split '/', $name;
3660                 my $basename = pop @dirname;
3661                 my $fullname = '';
3662
3663                 foreach my $dir (@dirname) {
3664                         $fullname .= ($fullname ? '/' : '') . $dir;
3665                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3666                                                      hash_base=>$hb),
3667                                       -title => $fullname}, esc_path($dir));
3668                         print " / ";
3669                 }
3670                 if (defined $type && $type eq 'blob') {
3671                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3672                                                      hash_base=>$hb),
3673                                       -title => $name}, esc_path($basename));
3674                 } elsif (defined $type && $type eq 'tree') {
3675                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3676                                                      hash_base=>$hb),
3677                                       -title => $name}, esc_path($basename));
3678                         print " / ";
3679                 } else {
3680                         print esc_path($basename);
3681                 }
3682         }
3683         print "<br/></div>\n";
3684 }
3685
3686 sub git_print_log {
3687         my $log = shift;
3688         my %opts = @_;
3689
3690         if ($opts{'-remove_title'}) {
3691                 # remove title, i.e. first line of log
3692                 shift @$log;
3693         }
3694         # remove leading empty lines
3695         while (defined $log->[0] && $log->[0] eq "") {
3696                 shift @$log;
3697         }
3698
3699         # print log
3700         my $signoff = 0;
3701         my $empty = 0;
3702         foreach my $line (@$log) {
3703                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3704                         $signoff = 1;
3705                         $empty = 0;
3706                         if (! $opts{'-remove_signoff'}) {
3707                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3708                                 next;
3709                         } else {
3710                                 # remove signoff lines
3711                                 next;
3712                         }
3713                 } else {
3714                         $signoff = 0;
3715                 }
3716
3717                 # print only one empty line
3718                 # do not print empty line after signoff
3719                 if ($line eq "") {
3720                         next if ($empty || $signoff);
3721                         $empty = 1;
3722                 } else {
3723                         $empty = 0;
3724                 }
3725
3726                 print format_log_line_html($line) . "<br/>\n";
3727         }
3728
3729         if ($opts{'-final_empty_line'}) {
3730                 # end with single empty line
3731                 print "<br/>\n" unless $empty;
3732         }
3733 }
3734
3735 # return link target (what link points to)
3736 sub git_get_link_target {
3737         my $hash = shift;
3738         my $link_target;
3739
3740         # read link
3741         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3742                 or return;
3743         {
3744                 local $/ = undef;
3745                 $link_target = <$fd>;
3746         }
3747         close $fd
3748                 or return;
3749
3750         return $link_target;
3751 }
3752
3753 # given link target, and the directory (basedir) the link is in,
3754 # return target of link relative to top directory (top tree);
3755 # return undef if it is not possible (including absolute links).
3756 sub normalize_link_target {
3757         my ($link_target, $basedir) = @_;
3758
3759         # absolute symlinks (beginning with '/') cannot be normalized
3760         return if (substr($link_target, 0, 1) eq '/');
3761
3762         # normalize link target to path from top (root) tree (dir)
3763         my $path;
3764         if ($basedir) {
3765                 $path = $basedir . '/' . $link_target;
3766         } else {
3767                 # we are in top (root) tree (dir)
3768                 $path = $link_target;
3769         }
3770
3771         # remove //, /./, and /../
3772         my @path_parts;
3773         foreach my $part (split('/', $path)) {
3774                 # discard '.' and ''
3775                 next if (!$part || $part eq '.');
3776                 # handle '..'
3777                 if ($part eq '..') {
3778                         if (@path_parts) {
3779                                 pop @path_parts;
3780                         } else {
3781                                 # link leads outside repository (outside top dir)
3782                                 return;
3783                         }
3784                 } else {
3785                         push @path_parts, $part;
3786                 }
3787         }
3788         $path = join('/', @path_parts);
3789
3790         return $path;
3791 }
3792
3793 # print tree entry (row of git_tree), but without encompassing <tr> element
3794 sub git_print_tree_entry {
3795         my ($t, $basedir, $hash_base, $have_blame) = @_;
3796
3797         my %base_key = ();
3798         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3799
3800         # The format of a table row is: mode list link.  Where mode is
3801         # the mode of the entry, list is the name of the entry, an href,
3802         # and link is the action links of the entry.
3803
3804         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3805         if (exists $t->{'size'}) {
3806                 print "<td class=\"size\">$t->{'size'}</td>\n";
3807         }
3808         if ($t->{'type'} eq "blob") {
3809                 print "<td class=\"list\">" .
3810                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3811                                                file_name=>"$basedir$t->{'name'}", %base_key),
3812                                 -class => "list"}, esc_path($t->{'name'}));
3813                 if (S_ISLNK(oct $t->{'mode'})) {
3814                         my $link_target = git_get_link_target($t->{'hash'});
3815                         if ($link_target) {
3816                                 my $norm_target = normalize_link_target($link_target, $basedir);
3817                                 if (defined $norm_target) {
3818                                         print " -> " .
3819                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3820                                                                      file_name=>$norm_target),
3821                                                        -title => $norm_target}, esc_path($link_target));
3822                                 } else {
3823                                         print " -> " . esc_path($link_target);
3824                                 }
3825                         }
3826                 }
3827                 print "</td>\n";
3828                 print "<td class=\"link\">";
3829                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3830                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3831                               "blob");
3832                 if ($have_blame) {
3833                         print " | " .
3834                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3835                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3836                                       "blame");
3837                 }
3838                 if (defined $hash_base) {
3839                         print " | " .
3840                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3841                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3842                                       "history");
3843                 }
3844                 print " | " .
3845                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3846                                                file_name=>"$basedir$t->{'name'}")},
3847                                 "raw");
3848                 print "</td>\n";
3849
3850         } elsif ($t->{'type'} eq "tree") {
3851                 print "<td class=\"list\">";
3852                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3853                                              file_name=>"$basedir$t->{'name'}",
3854                                              %base_key)},
3855                               esc_path($t->{'name'}));
3856                 print "</td>\n";
3857                 print "<td class=\"link\">";
3858                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3859                                              file_name=>"$basedir$t->{'name'}",
3860                                              %base_key)},
3861                               "tree");
3862                 if (defined $hash_base) {
3863                         print " | " .
3864                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3865                                                      file_name=>"$basedir$t->{'name'}")},
3866                                       "history");
3867                 }
3868                 print "</td>\n";
3869         } else {
3870                 # unknown object: we can only present history for it
3871                 # (this includes 'commit' object, i.e. submodule support)
3872                 print "<td class=\"list\">" .
3873                       esc_path($t->{'name'}) .
3874                       "</td>\n";
3875                 print "<td class=\"link\">";
3876                 if (defined $hash_base) {
3877                         print $cgi->a({-href => href(action=>"history",
3878                                                      hash_base=>$hash_base,
3879                                                      file_name=>"$basedir$t->{'name'}")},
3880                                       "history");
3881                 }
3882                 print "</td>\n";
3883         }
3884 }
3885
3886 ## ......................................................................
3887 ## functions printing large fragments of HTML
3888
3889 # get pre-image filenames for merge (combined) diff
3890 sub fill_from_file_info {
3891         my ($diff, @parents) = @_;
3892
3893         $diff->{'from_file'} = [ ];
3894         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3895         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3896                 if ($diff->{'status'}[$i] eq 'R' ||
3897                     $diff->{'status'}[$i] eq 'C') {
3898                         $diff->{'from_file'}[$i] =
3899                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3900                 }
3901         }
3902
3903         return $diff;
3904 }
3905
3906 # is current raw difftree line of file deletion
3907 sub is_deleted {
3908         my $diffinfo = shift;
3909
3910         return $diffinfo->{'to_id'} eq ('0' x 40);
3911 }
3912
3913 # does patch correspond to [previous] difftree raw line
3914 # $diffinfo  - hashref of parsed raw diff format
3915 # $patchinfo - hashref of parsed patch diff format
3916 #              (the same keys as in $diffinfo)
3917 sub is_patch_split {
3918         my ($diffinfo, $patchinfo) = @_;
3919
3920         return defined $diffinfo && defined $patchinfo
3921                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3922 }
3923
3924
3925 sub git_difftree_body {
3926         my ($difftree, $hash, @parents) = @_;
3927         my ($parent) = $parents[0];
3928         my $have_blame = gitweb_check_feature('blame');
3929         print "<div class=\"list_head\">\n";
3930         if ($#{$difftree} > 10) {
3931                 print(($#{$difftree} + 1) . " files changed:\n");
3932         }
3933         print "</div>\n";
3934
3935         print "<table class=\"" .
3936               (@parents > 1 ? "combined " : "") .
3937               "diff_tree\">\n";
3938
3939         # header only for combined diff in 'commitdiff' view
3940         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3941         if ($has_header) {
3942                 # table header
3943                 print "<thead><tr>\n" .
3944                        "<th></th><th></th>\n"; # filename, patchN link
3945                 for (my $i = 0; $i < @parents; $i++) {
3946                         my $par = $parents[$i];
3947                         print "<th>" .
3948                               $cgi->a({-href => href(action=>"commitdiff",
3949                                                      hash=>$hash, hash_parent=>$par),
3950                                        -title => 'commitdiff to parent number ' .
3951                                                   ($i+1) . ': ' . substr($par,0,7)},
3952                                       $i+1) .
3953                               "&nbsp;</th>\n";
3954                 }
3955                 print "</tr></thead>\n<tbody>\n";
3956         }
3957
3958         my $alternate = 1;
3959         my $patchno = 0;
3960         foreach my $line (@{$difftree}) {
3961                 my $diff = parsed_difftree_line($line);
3962
3963                 if ($alternate) {
3964                         print "<tr class=\"dark\">\n";
3965                 } else {
3966                         print "<tr class=\"light\">\n";
3967                 }
3968                 $alternate ^= 1;
3969
3970                 if (exists $diff->{'nparents'}) { # combined diff
3971
3972                         fill_from_file_info($diff, @parents)
3973                                 unless exists $diff->{'from_file'};
3974
3975                         if (!is_deleted($diff)) {
3976                                 # file exists in the result (child) commit
3977                                 print "<td>" .
3978                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3979                                                              file_name=>$diff->{'to_file'},
3980                                                              hash_base=>$hash),
3981                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3982                                       "</td>\n";
3983                         } else {
3984                                 print "<td>" .
3985                                       esc_path($diff->{'to_file'}) .
3986                                       "</td>\n";
3987                         }
3988
3989                         if ($action eq 'commitdiff') {
3990                                 # link to patch
3991                                 $patchno++;
3992                                 print "<td class=\"link\">" .
3993                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3994                                       " | " .
3995                                       "</td>\n";
3996                         }
3997
3998                         my $has_history = 0;
3999                         my $not_deleted = 0;
4000                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4001                                 my $hash_parent = $parents[$i];
4002                                 my $from_hash = $diff->{'from_id'}[$i];
4003                                 my $from_path = $diff->{'from_file'}[$i];
4004                                 my $status = $diff->{'status'}[$i];
4005
4006                                 $has_history ||= ($status ne 'A');
4007                                 $not_deleted ||= ($status ne 'D');
4008
4009                                 if ($status eq 'A') {
4010                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4011                                 } elsif ($status eq 'D') {
4012                                         print "<td class=\"link\">" .
4013                                               $cgi->a({-href => href(action=>"blob",
4014                                                                      hash_base=>$hash,
4015                                                                      hash=>$from_hash,
4016                                                                      file_name=>$from_path)},
4017                                                       "blob" . ($i+1)) .
4018                                               " | </td>\n";
4019                                 } else {
4020                                         if ($diff->{'to_id'} eq $from_hash) {
4021                                                 print "<td class=\"link nochange\">";
4022                                         } else {
4023                                                 print "<td class=\"link\">";
4024                                         }
4025                                         print $cgi->a({-href => href(action=>"blobdiff",
4026                                                                      hash=>$diff->{'to_id'},
4027                                                                      hash_parent=>$from_hash,
4028                                                                      hash_base=>$hash,
4029                                                                      hash_parent_base=>$hash_parent,
4030                                                                      file_name=>$diff->{'to_file'},
4031                                                                      file_parent=>$from_path)},
4032                                                       "diff" . ($i+1)) .
4033                                               " | </td>\n";
4034                                 }
4035                         }
4036
4037                         print "<td class=\"link\">";
4038                         if ($not_deleted) {
4039                                 print $cgi->a({-href => href(action=>"blob",
4040                                                              hash=>$diff->{'to_id'},
4041                                                              file_name=>$diff->{'to_file'},
4042                                                              hash_base=>$hash)},
4043                                               "blob");
4044                                 print " | " if ($has_history);
4045                         }
4046                         if ($has_history) {
4047                                 print $cgi->a({-href => href(action=>"history",
4048                                                              file_name=>$diff->{'to_file'},
4049                                                              hash_base=>$hash)},
4050                                               "history");
4051                         }
4052                         print "</td>\n";
4053
4054                         print "</tr>\n";
4055                         next; # instead of 'else' clause, to avoid extra indent
4056                 }
4057                 # else ordinary diff
4058
4059                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4060                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4061                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4062                         $to_mode_oct = oct $diff->{'to_mode'};
4063                         if (S_ISREG($to_mode_oct)) { # only for regular file
4064                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4065                         }
4066                         $to_file_type = file_type($diff->{'to_mode'});
4067                 }
4068                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4069                         $from_mode_oct = oct $diff->{'from_mode'};
4070                         if (S_ISREG($to_mode_oct)) { # only for regular file
4071                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4072                         }
4073                         $from_file_type = file_type($diff->{'from_mode'});
4074                 }
4075
4076                 if ($diff->{'status'} eq "A") { # created
4077                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4078                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4079                         $mode_chng   .= "]</span>";
4080                         print "<td>";
4081                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4082                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4083                                       -class => "list"}, esc_path($diff->{'file'}));
4084                         print "</td>\n";
4085                         print "<td>$mode_chng</td>\n";
4086                         print "<td class=\"link\">";
4087                         if ($action eq 'commitdiff') {
4088                                 # link to patch
4089                                 $patchno++;
4090                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4091                                 print " | ";
4092                         }
4093                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4094                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4095                                       "blob");
4096                         print "</td>\n";
4097
4098                 } elsif ($diff->{'status'} eq "D") { # deleted
4099                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4100                         print "<td>";
4101                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4102                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4103                                        -class => "list"}, esc_path($diff->{'file'}));
4104                         print "</td>\n";
4105                         print "<td>$mode_chng</td>\n";
4106                         print "<td class=\"link\">";
4107                         if ($action eq 'commitdiff') {
4108                                 # link to patch
4109                                 $patchno++;
4110                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4111                                 print " | ";
4112                         }
4113                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4114                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4115                                       "blob") . " | ";
4116                         if ($have_blame) {
4117                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4118                                                              file_name=>$diff->{'file'})},
4119                                               "blame") . " | ";
4120                         }
4121                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4122                                                      file_name=>$diff->{'file'})},
4123                                       "history");
4124                         print "</td>\n";
4125
4126                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4127                         my $mode_chnge = "";
4128                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4129                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4130                                 if ($from_file_type ne $to_file_type) {
4131                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4132                                 }
4133                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4134                                         if ($from_mode_str && $to_mode_str) {
4135                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4136                                         } elsif ($to_mode_str) {
4137                                                 $mode_chnge .= " mode: $to_mode_str";
4138                                         }
4139                                 }
4140                                 $mode_chnge .= "]</span>\n";
4141                         }
4142                         print "<td>";
4143                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4144                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4145                                       -class => "list"}, esc_path($diff->{'file'}));
4146                         print "</td>\n";
4147                         print "<td>$mode_chnge</td>\n";
4148                         print "<td class=\"link\">";
4149                         if ($action eq 'commitdiff') {
4150                                 # link to patch
4151                                 $patchno++;
4152                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4153                                       " | ";
4154                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4155                                 # "commit" view and modified file (not onlu mode changed)
4156                                 print $cgi->a({-href => href(action=>"blobdiff",
4157                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4158                                                              hash_base=>$hash, hash_parent_base=>$parent,
4159                                                              file_name=>$diff->{'file'})},
4160                                               "diff") .
4161                                       " | ";
4162                         }
4163                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4164                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4165                                        "blob") . " | ";
4166                         if ($have_blame) {
4167                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4168                                                              file_name=>$diff->{'file'})},
4169                                               "blame") . " | ";
4170                         }
4171                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4172                                                      file_name=>$diff->{'file'})},
4173                                       "history");
4174                         print "</td>\n";
4175
4176                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4177                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4178                         my $nstatus = $status_name{$diff->{'status'}};
4179                         my $mode_chng = "";
4180                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4181                                 # mode also for directories, so we cannot use $to_mode_str
4182                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4183                         }
4184                         print "<td>" .
4185                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4186                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4187                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4188                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4189                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4190                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4191                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4192                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4193                               "<td class=\"link\">";
4194                         if ($action eq 'commitdiff') {
4195                                 # link to patch
4196                                 $patchno++;
4197                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4198                                       " | ";
4199                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4200                                 # "commit" view and modified file (not only pure rename or copy)
4201                                 print $cgi->a({-href => href(action=>"blobdiff",
4202                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4203                                                              hash_base=>$hash, hash_parent_base=>$parent,
4204                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4205                                               "diff") .
4206                                       " | ";
4207                         }
4208                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4209                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4210                                       "blob") . " | ";
4211                         if ($have_blame) {
4212                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4213                                                              file_name=>$diff->{'to_file'})},
4214                                               "blame") . " | ";
4215                         }
4216                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4217                                                     file_name=>$diff->{'to_file'})},
4218                                       "history");
4219                         print "</td>\n";
4220
4221                 } # we should not encounter Unmerged (U) or Unknown (X) status
4222                 print "</tr>\n";
4223         }
4224         print "</tbody>" if $has_header;
4225         print "</table>\n";
4226 }
4227
4228 sub git_patchset_body {
4229         my ($fd, $difftree, $hash, @hash_parents) = @_;
4230         my ($hash_parent) = $hash_parents[0];
4231
4232         my $is_combined = (@hash_parents > 1);
4233         my $patch_idx = 0;
4234         my $patch_number = 0;
4235         my $patch_line;
4236         my $diffinfo;
4237         my $to_name;
4238         my (%from, %to);
4239
4240         print "<div class=\"patchset\">\n";
4241
4242         # skip to first patch
4243         while ($patch_line = <$fd>) {
4244                 chomp $patch_line;
4245
4246                 last if ($patch_line =~ m/^diff /);
4247         }
4248
4249  PATCH:
4250         while ($patch_line) {
4251
4252                 # parse "git diff" header line
4253                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4254                         # $1 is from_name, which we do not use
4255                         $to_name = unquote($2);
4256                         $to_name =~ s!^b/!!;
4257                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4258                         # $1 is 'cc' or 'combined', which we do not use
4259                         $to_name = unquote($2);
4260                 } else {
4261                         $to_name = undef;
4262                 }
4263
4264                 # check if current patch belong to current raw line
4265                 # and parse raw git-diff line if needed
4266                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4267                         # this is continuation of a split patch
4268                         print "<div class=\"patch cont\">\n";
4269                 } else {
4270                         # advance raw git-diff output if needed
4271                         $patch_idx++ if defined $diffinfo;
4272
4273                         # read and prepare patch information
4274                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4275
4276                         # compact combined diff output can have some patches skipped
4277                         # find which patch (using pathname of result) we are at now;
4278                         if ($is_combined) {
4279                                 while ($to_name ne $diffinfo->{'to_file'}) {
4280                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4281                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4282                                               "</div>\n";  # class="patch"
4283
4284                                         $patch_idx++;
4285                                         $patch_number++;
4286
4287                                         last if $patch_idx > $#$difftree;
4288                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4289                                 }
4290                         }
4291
4292                         # modifies %from, %to hashes
4293                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4294
4295                         # this is first patch for raw difftree line with $patch_idx index
4296                         # we index @$difftree array from 0, but number patches from 1
4297                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4298                 }
4299
4300                 # git diff header
4301                 #assert($patch_line =~ m/^diff /) if DEBUG;
4302                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4303                 $patch_number++;
4304                 # print "git diff" header
4305                 print format_git_diff_header_line($patch_line, $diffinfo,
4306                                                   \%from, \%to);
4307
4308                 # print extended diff header
4309                 print "<div class=\"diff extended_header\">\n";
4310         EXTENDED_HEADER:
4311                 while ($patch_line = <$fd>) {
4312                         chomp $patch_line;
4313
4314                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4315
4316                         print format_extended_diff_header_line($patch_line, $diffinfo,
4317                                                                \%from, \%to);
4318                 }
4319                 print "</div>\n"; # class="diff extended_header"
4320
4321                 # from-file/to-file diff header
4322                 if (! $patch_line) {
4323                         print "</div>\n"; # class="patch"
4324                         last PATCH;
4325                 }
4326                 next PATCH if ($patch_line =~ m/^diff /);
4327                 #assert($patch_line =~ m/^---/) if DEBUG;
4328
4329                 my $last_patch_line = $patch_line;
4330                 $patch_line = <$fd>;
4331                 chomp $patch_line;
4332                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4333
4334                 print format_diff_from_to_header($last_patch_line, $patch_line,
4335                                                  $diffinfo, \%from, \%to,
4336                                                  @hash_parents);
4337
4338                 # the patch itself
4339         LINE:
4340                 while ($patch_line = <$fd>) {
4341                         chomp $patch_line;
4342
4343                         next PATCH if ($patch_line =~ m/^diff /);
4344
4345                         print format_diff_line($patch_line, \%from, \%to);
4346                 }
4347
4348         } continue {
4349                 print "</div>\n"; # class="patch"
4350         }
4351
4352         # for compact combined (--cc) format, with chunk and patch simpliciaction
4353         # patchset might be empty, but there might be unprocessed raw lines
4354         for (++$patch_idx if $patch_number > 0;
4355              $patch_idx < @$difftree;
4356              ++$patch_idx) {
4357                 # read and prepare patch information
4358                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4359
4360                 # generate anchor for "patch" links in difftree / whatchanged part
4361                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4362                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4363                       "</div>\n";  # class="patch"
4364
4365                 $patch_number++;
4366         }
4367
4368         if ($patch_number == 0) {
4369                 if (@hash_parents > 1) {
4370                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4371                 } else {
4372                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4373                 }
4374         }
4375
4376         print "</div>\n"; # class="patchset"
4377 }
4378
4379 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4380
4381 # fills project list info (age, description, owner, forks) for each
4382 # project in the list, removing invalid projects from returned list
4383 # NOTE: modifies $projlist, but does not remove entries from it
4384 sub fill_project_list_info {
4385         my ($projlist, $check_forks) = @_;
4386         my @projects;
4387
4388         my $show_ctags = gitweb_check_feature('ctags');
4389  PROJECT:
4390         foreach my $pr (@$projlist) {
4391                 my (@activity) = git_get_last_activity($pr->{'path'});
4392                 unless (@activity) {
4393                         next PROJECT;
4394                 }
4395                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4396                 if (!defined $pr->{'descr'}) {
4397                         my $descr = git_get_project_description($pr->{'path'}) || "";
4398                         $descr = to_utf8($descr);
4399                         $pr->{'descr_long'} = $descr;
4400                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4401                 }
4402                 if (!defined $pr->{'owner'}) {
4403                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4404                 }
4405                 if ($check_forks) {
4406                         my $pname = $pr->{'path'};
4407                         if (($pname =~ s/\.git$//) &&
4408                             ($pname !~ /\/$/) &&
4409                             (-d "$projectroot/$pname")) {
4410                                 $pr->{'forks'} = "-d $projectroot/$pname";
4411                         } else {
4412                                 $pr->{'forks'} = 0;
4413                         }
4414                 }
4415                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4416                 push @projects, $pr;
4417         }
4418
4419         return @projects;
4420 }
4421
4422 # print 'sort by' <th> element, generating 'sort by $name' replay link
4423 # if that order is not selected
4424 sub print_sort_th {
4425         print format_sort_th(@_);
4426 }
4427
4428 sub format_sort_th {
4429         my ($name, $order, $header) = @_;
4430         my $sort_th = "";
4431         $header ||= ucfirst($name);
4432
4433         if ($order eq $name) {
4434                 $sort_th .= "<th>$header</th>\n";
4435         } else {
4436                 $sort_th .= "<th>" .
4437                             $cgi->a({-href => href(-replay=>1, order=>$name),
4438                                      -class => "header"}, $header) .
4439                             "</th>\n";
4440         }
4441
4442         return $sort_th;
4443 }
4444
4445 sub git_project_list_body {
4446         # actually uses global variable $project
4447         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4448
4449         my $check_forks = gitweb_check_feature('forks');
4450         my @projects = fill_project_list_info($projlist, $check_forks);
4451
4452         $order ||= $default_projects_order;
4453         $from = 0 unless defined $from;
4454         $to = $#projects if (!defined $to || $#projects < $to);
4455
4456         my %order_info = (
4457                 project => { key => 'path', type => 'str' },
4458                 descr => { key => 'descr_long', type => 'str' },
4459                 owner => { key => 'owner', type => 'str' },
4460                 age => { key => 'age', type => 'num' }
4461         );
4462         my $oi = $order_info{$order};
4463         if ($oi->{'type'} eq 'str') {
4464                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4465         } else {
4466                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4467         }
4468
4469         my $show_ctags = gitweb_check_feature('ctags');
4470         if ($show_ctags) {
4471                 my %ctags;
4472                 foreach my $p (@projects) {
4473                         foreach my $ct (keys %{$p->{'ctags'}}) {
4474                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4475                         }
4476                 }
4477                 my $cloud = git_populate_project_tagcloud(\%ctags);
4478                 print git_show_project_tagcloud($cloud, 64);
4479         }
4480
4481         print "<table class=\"project_list\">\n";
4482         unless ($no_header) {
4483                 print "<tr>\n";
4484                 if ($check_forks) {
4485                         print "<th></th>\n";
4486                 }
4487                 print_sort_th('project', $order, 'Project');
4488                 print_sort_th('descr', $order, 'Description');
4489                 print_sort_th('owner', $order, 'Owner');
4490                 print_sort_th('age', $order, 'Last Change');
4491                 print "<th></th>\n" . # for links
4492                       "</tr>\n";
4493         }
4494         my $alternate = 1;
4495         my $tagfilter = $cgi->param('by_tag');
4496         for (my $i = $from; $i <= $to; $i++) {
4497                 my $pr = $projects[$i];
4498
4499                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4500                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4501                         and not $pr->{'descr_long'} =~ /$searchtext/;
4502                 # Weed out forks or non-matching entries of search
4503                 if ($check_forks) {
4504                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4505                         $forkbase="^$forkbase" if $forkbase;
4506                         next if not $searchtext and not $tagfilter and $show_ctags
4507                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4508                 }
4509
4510                 if ($alternate) {
4511                         print "<tr class=\"dark\">\n";
4512                 } else {
4513                         print "<tr class=\"light\">\n";
4514                 }
4515                 $alternate ^= 1;
4516                 if ($check_forks) {
4517                         print "<td>";
4518                         if ($pr->{'forks'}) {
4519                                 print "<!-- $pr->{'forks'} -->\n";
4520                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4521                         }
4522                         print "</td>\n";
4523                 }
4524                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4525                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4526                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4527                                         -class => "list", -title => $pr->{'descr_long'}},
4528                                         esc_html($pr->{'descr'})) . "</td>\n" .
4529                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4530                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4531                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4532                       "<td class=\"link\">" .
4533                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4534                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4535                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4536                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4537                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4538                       "</td>\n" .
4539                       "</tr>\n";
4540         }
4541         if (defined $extra) {
4542                 print "<tr>\n";
4543                 if ($check_forks) {
4544                         print "<td></td>\n";
4545                 }
4546                 print "<td colspan=\"5\">$extra</td>\n" .
4547                       "</tr>\n";
4548         }
4549         print "</table>\n";
4550 }
4551
4552 sub git_log_body {
4553         # uses global variable $project
4554         my ($commitlist, $from, $to, $refs, $extra) = @_;
4555
4556         $from = 0 unless defined $from;
4557         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4558
4559         for (my $i = 0; $i <= $to; $i++) {
4560                 my %co = %{$commitlist->[$i]};
4561                 next if !%co;
4562                 my $commit = $co{'id'};
4563                 my $ref = format_ref_marker($refs, $commit);
4564                 my %ad = parse_date($co{'author_epoch'});
4565                 git_print_header_div('commit',
4566                                "<span class=\"age\">$co{'age_string'}</span>" .
4567                                esc_html($co{'title'}) . $ref,
4568                                $commit);
4569                 print "<div class=\"title_text\">\n" .
4570                       "<div class=\"log_link\">\n" .
4571                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4572                       " | " .
4573                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4574                       " | " .
4575                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4576                       "<br/>\n" .
4577                       "</div>\n";
4578                       git_print_authorship(\%co, -tag => 'span');
4579                       print "<br/>\n</div>\n";
4580
4581                 print "<div class=\"log_body\">\n";
4582                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4583                 print "</div>\n";
4584         }
4585         if ($extra) {
4586                 print "<div class=\"page_nav\">\n";
4587                 print "$extra\n";
4588                 print "</div>\n";
4589         }
4590 }
4591
4592 sub git_shortlog_body {
4593         # uses global variable $project
4594         my ($commitlist, $from, $to, $refs, $extra) = @_;
4595
4596         $from = 0 unless defined $from;
4597         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4598
4599         print "<table class=\"shortlog\">\n";
4600         my $alternate = 1;
4601         for (my $i = $from; $i <= $to; $i++) {
4602                 my %co = %{$commitlist->[$i]};
4603                 my $commit = $co{'id'};
4604                 my $ref = format_ref_marker($refs, $commit);
4605                 if ($alternate) {
4606                         print "<tr class=\"dark\">\n";
4607                 } else {
4608                         print "<tr class=\"light\">\n";
4609                 }
4610                 $alternate ^= 1;
4611                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4612                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4613                       format_author_html('td', \%co, 10) . "<td>";
4614                 print format_subject_html($co{'title'}, $co{'title_short'},
4615                                           href(action=>"commit", hash=>$commit), $ref);
4616                 print "</td>\n" .
4617                       "<td class=\"link\">" .
4618                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4619                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4620                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4621                 my $snapshot_links = format_snapshot_links($commit);
4622                 if (defined $snapshot_links) {
4623                         print " | " . $snapshot_links;
4624                 }
4625                 print "</td>\n" .
4626                       "</tr>\n";
4627         }
4628         if (defined $extra) {
4629                 print "<tr>\n" .
4630                       "<td colspan=\"4\">$extra</td>\n" .
4631                       "</tr>\n";
4632         }
4633         print "</table>\n";
4634 }
4635
4636 sub git_history_body {
4637         # Warning: assumes constant type (blob or tree) during history
4638         my ($commitlist, $from, $to, $refs, $extra,
4639             $file_name, $file_hash, $ftype) = @_;
4640
4641         $from = 0 unless defined $from;
4642         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4643
4644         print "<table class=\"history\">\n";
4645         my $alternate = 1;
4646         for (my $i = $from; $i <= $to; $i++) {
4647                 my %co = %{$commitlist->[$i]};
4648                 if (!%co) {
4649                         next;
4650                 }
4651                 my $commit = $co{'id'};
4652
4653                 my $ref = format_ref_marker($refs, $commit);
4654
4655                 if ($alternate) {
4656                         print "<tr class=\"dark\">\n";
4657                 } else {
4658                         print "<tr class=\"light\">\n";
4659                 }
4660                 $alternate ^= 1;
4661                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4662         # shortlog:   format_author_html('td', \%co, 10)
4663                       format_author_html('td', \%co, 15, 3) . "<td>";
4664                 # originally git_history used chop_str($co{'title'}, 50)
4665                 print format_subject_html($co{'title'}, $co{'title_short'},
4666                                           href(action=>"commit", hash=>$commit), $ref);
4667                 print "</td>\n" .
4668                       "<td class=\"link\">" .
4669                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4670                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4671
4672                 if ($ftype eq 'blob') {
4673                         my $blob_current = $file_hash;
4674                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4675                         if (defined $blob_current && defined $blob_parent &&
4676                                         $blob_current ne $blob_parent) {
4677                                 print " | " .
4678                                         $cgi->a({-href => href(action=>"blobdiff",
4679                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4680                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4681                                                                file_name=>$file_name)},
4682                                                 "diff to current");
4683                         }
4684                 }
4685                 print "</td>\n" .
4686                       "</tr>\n";
4687         }
4688         if (defined $extra) {
4689                 print "<tr>\n" .
4690                       "<td colspan=\"4\">$extra</td>\n" .
4691                       "</tr>\n";
4692         }
4693         print "</table>\n";
4694 }
4695
4696 sub git_tags_body {
4697         # uses global variable $project
4698         my ($taglist, $from, $to, $extra) = @_;
4699         $from = 0 unless defined $from;
4700         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4701
4702         print "<table class=\"tags\">\n";
4703         my $alternate = 1;
4704         for (my $i = $from; $i <= $to; $i++) {
4705                 my $entry = $taglist->[$i];
4706                 my %tag = %$entry;
4707                 my $comment = $tag{'subject'};
4708                 my $comment_short;
4709                 if (defined $comment) {
4710                         $comment_short = chop_str($comment, 30, 5);
4711                 }
4712                 if ($alternate) {
4713                         print "<tr class=\"dark\">\n";
4714                 } else {
4715                         print "<tr class=\"light\">\n";
4716                 }
4717                 $alternate ^= 1;
4718                 if (defined $tag{'age'}) {
4719                         print "<td><i>$tag{'age'}</i></td>\n";
4720                 } else {
4721                         print "<td></td>\n";
4722                 }
4723                 print "<td>" .
4724                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4725                                -class => "list name"}, esc_html($tag{'name'})) .
4726                       "</td>\n" .
4727                       "<td>";
4728                 if (defined $comment) {
4729                         print format_subject_html($comment, $comment_short,
4730                                                   href(action=>"tag", hash=>$tag{'id'}));
4731                 }
4732                 print "</td>\n" .
4733                       "<td class=\"selflink\">";
4734                 if ($tag{'type'} eq "tag") {
4735                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4736                 } else {
4737                         print "&nbsp;";
4738                 }
4739                 print "</td>\n" .
4740                       "<td class=\"link\">" . " | " .
4741                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4742                 if ($tag{'reftype'} eq "commit") {
4743                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4744                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4745                 } elsif ($tag{'reftype'} eq "blob") {
4746                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4747                 }
4748                 print "</td>\n" .
4749                       "</tr>";
4750         }
4751         if (defined $extra) {
4752                 print "<tr>\n" .
4753                       "<td colspan=\"5\">$extra</td>\n" .
4754                       "</tr>\n";
4755         }
4756         print "</table>\n";
4757 }
4758
4759 sub git_heads_body {
4760         # uses global variable $project
4761         my ($headlist, $head, $from, $to, $extra) = @_;
4762         $from = 0 unless defined $from;
4763         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4764
4765         print "<table class=\"heads\">\n";
4766         my $alternate = 1;
4767         for (my $i = $from; $i <= $to; $i++) {
4768                 my $entry = $headlist->[$i];
4769                 my %ref = %$entry;
4770                 my $curr = $ref{'id'} eq $head;
4771                 if ($alternate) {
4772                         print "<tr class=\"dark\">\n";
4773                 } else {
4774                         print "<tr class=\"light\">\n";
4775                 }
4776                 $alternate ^= 1;
4777                 print "<td><i>$ref{'age'}</i></td>\n" .
4778                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4779                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4780                                -class => "list name"},esc_html($ref{'name'})) .
4781                       "</td>\n" .
4782                       "<td class=\"link\">" .
4783                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4784                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4785                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4786                       "</td>\n" .
4787                       "</tr>";
4788         }
4789         if (defined $extra) {
4790                 print "<tr>\n" .
4791                       "<td colspan=\"3\">$extra</td>\n" .
4792                       "</tr>\n";
4793         }
4794         print "</table>\n";
4795 }
4796
4797 sub git_search_grep_body {
4798         my ($commitlist, $from, $to, $extra) = @_;
4799         $from = 0 unless defined $from;
4800         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4801
4802         print "<table class=\"commit_search\">\n";
4803         my $alternate = 1;
4804         for (my $i = $from; $i <= $to; $i++) {
4805                 my %co = %{$commitlist->[$i]};
4806                 if (!%co) {
4807                         next;
4808                 }
4809                 my $commit = $co{'id'};
4810                 if ($alternate) {
4811                         print "<tr class=\"dark\">\n";
4812                 } else {
4813                         print "<tr class=\"light\">\n";
4814                 }
4815                 $alternate ^= 1;
4816                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4817                       format_author_html('td', \%co, 15, 5) .
4818                       "<td>" .
4819                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4820                                -class => "list subject"},
4821                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4822                 my $comment = $co{'comment'};
4823                 foreach my $line (@$comment) {
4824                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4825                                 my ($lead, $match, $trail) = ($1, $2, $3);
4826                                 $match = chop_str($match, 70, 5, 'center');
4827                                 my $contextlen = int((80 - length($match))/2);
4828                                 $contextlen = 30 if ($contextlen > 30);
4829                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4830                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4831
4832                                 $lead  = esc_html($lead);
4833                                 $match = esc_html($match);
4834                                 $trail = esc_html($trail);
4835
4836                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4837                         }
4838                 }
4839                 print "</td>\n" .
4840                       "<td class=\"link\">" .
4841                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4842                       " | " .
4843                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4844                       " | " .
4845                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4846                 print "</td>\n" .
4847                       "</tr>\n";
4848         }
4849         if (defined $extra) {
4850                 print "<tr>\n" .
4851                       "<td colspan=\"3\">$extra</td>\n" .
4852                       "</tr>\n";
4853         }
4854         print "</table>\n";
4855 }
4856
4857 ## ======================================================================
4858 ## ======================================================================
4859 ## actions
4860
4861 sub git_project_list {
4862         my $order = $input_params{'order'};
4863         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4864                 die_error(400, "Unknown order parameter");
4865         }
4866
4867         my @list = git_get_projects_list();
4868         if (!@list) {
4869                 die_error(404, "No projects found");
4870         }
4871
4872         git_header_html();
4873         if (defined $home_text && -f $home_text) {
4874                 print "<div class=\"index_include\">\n";
4875                 insert_file($home_text);
4876                 print "</div>\n";
4877         }
4878         print $cgi->startform(-method => "get") .
4879               "<p class=\"projsearch\">Search:\n" .
4880               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4881               "</p>" .
4882               $cgi->end_form() . "\n";
4883         git_project_list_body(\@list, $order);
4884         git_footer_html();
4885 }
4886
4887 sub git_forks {
4888         my $order = $input_params{'order'};
4889         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4890                 die_error(400, "Unknown order parameter");
4891         }
4892
4893         my @list = git_get_projects_list($project);
4894         if (!@list) {
4895                 die_error(404, "No forks found");
4896         }
4897
4898         git_header_html();
4899         git_print_page_nav('','');
4900         git_print_header_div('summary', "$project forks");
4901         git_project_list_body(\@list, $order);
4902         git_footer_html();
4903 }
4904
4905 sub git_project_index {
4906         my @projects = git_get_projects_list($project);
4907
4908         print $cgi->header(
4909                 -type => 'text/plain',
4910                 -charset => 'utf-8',
4911                 -content_disposition => 'inline; filename="index.aux"');
4912
4913         foreach my $pr (@projects) {
4914                 if (!exists $pr->{'owner'}) {
4915                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4916                 }
4917
4918                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4919                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4920                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4921                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4922                 $path  =~ s/ /\+/g;
4923                 $owner =~ s/ /\+/g;
4924
4925                 print "$path $owner\n";
4926         }
4927 }
4928
4929 sub git_summary {
4930         my $descr = git_get_project_description($project) || "none";
4931         my %co = parse_commit("HEAD");
4932         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4933         my $head = $co{'id'};
4934
4935         my $owner = git_get_project_owner($project);
4936
4937         my $refs = git_get_references();
4938         # These get_*_list functions return one more to allow us to see if
4939         # there are more ...
4940         my @taglist  = git_get_tags_list(16);
4941         my @headlist = git_get_heads_list(16);
4942         my @forklist;
4943         my $check_forks = gitweb_check_feature('forks');
4944
4945         if ($check_forks) {
4946                 @forklist = git_get_projects_list($project);
4947         }
4948
4949         git_header_html();
4950         git_print_page_nav('summary','', $head);
4951
4952         print "<div class=\"title\">&nbsp;</div>\n";
4953         print "<table class=\"projects_list\">\n" .
4954               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4955               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4956         if (defined $cd{'rfc2822'}) {
4957                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4958         }
4959
4960         # use per project git URL list in $projectroot/$project/cloneurl
4961         # or make project git URL from git base URL and project name
4962         my $url_tag = "URL";
4963         my @url_list = git_get_project_url_list($project);
4964         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4965         foreach my $git_url (@url_list) {
4966                 next unless $git_url;
4967                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4968                 $url_tag = "";
4969         }
4970
4971         # Tag cloud
4972         my $show_ctags = gitweb_check_feature('ctags');
4973         if ($show_ctags) {
4974                 my $ctags = git_get_project_ctags($project);
4975                 my $cloud = git_populate_project_tagcloud($ctags);
4976                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4977                 print "</td>\n<td>" unless %$ctags;
4978                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4979                 print "</td>\n<td>" if %$ctags;
4980                 print git_show_project_tagcloud($cloud, 48);
4981                 print "</td></tr>";
4982         }
4983
4984         print "</table>\n";
4985
4986         # If XSS prevention is on, we don't include README.html.
4987         # TODO: Allow a readme in some safe format.
4988         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4989                 print "<div class=\"title\">readme</div>\n" .
4990                       "<div class=\"readme\">\n";
4991                 insert_file("$projectroot/$project/README.html");
4992                 print "\n</div>\n"; # class="readme"
4993         }
4994
4995         # we need to request one more than 16 (0..15) to check if
4996         # those 16 are all
4997         my @commitlist = $head ? parse_commits($head, 17) : ();
4998         if (@commitlist) {
4999                 git_print_header_div('shortlog');
5000                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5001                                   $#commitlist <=  15 ? undef :
5002                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5003         }
5004
5005         if (@taglist) {
5006                 git_print_header_div('tags');
5007                 git_tags_body(\@taglist, 0, 15,
5008                               $#taglist <=  15 ? undef :
5009                               $cgi->a({-href => href(action=>"tags")}, "..."));
5010         }
5011
5012         if (@headlist) {
5013                 git_print_header_div('heads');
5014                 git_heads_body(\@headlist, $head, 0, 15,
5015                                $#headlist <= 15 ? undef :
5016                                $cgi->a({-href => href(action=>"heads")}, "..."));
5017         }
5018
5019         if (@forklist) {
5020                 git_print_header_div('forks');
5021                 git_project_list_body(\@forklist, 'age', 0, 15,
5022                                       $#forklist <= 15 ? undef :
5023                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5024                                       'no_header');
5025         }
5026
5027         git_footer_html();
5028 }
5029
5030 sub git_tag {
5031         my $head = git_get_head_hash($project);
5032         git_header_html();
5033         git_print_page_nav('','', $head,undef,$head);
5034         my %tag = parse_tag($hash);
5035
5036         if (! %tag) {
5037                 die_error(404, "Unknown tag object");
5038         }
5039
5040         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5041         print "<div class=\"title_text\">\n" .
5042               "<table class=\"object_header\">\n" .
5043               "<tr>\n" .
5044               "<td>object</td>\n" .
5045               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5046                                $tag{'object'}) . "</td>\n" .
5047               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5048                                               $tag{'type'}) . "</td>\n" .
5049               "</tr>\n";
5050         if (defined($tag{'author'})) {
5051                 git_print_authorship_rows(\%tag, 'author');
5052         }
5053         print "</table>\n\n" .
5054               "</div>\n";
5055         print "<div class=\"page_body\">";
5056         my $comment = $tag{'comment'};
5057         foreach my $line (@$comment) {
5058                 chomp $line;
5059                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5060         }
5061         print "</div>\n";
5062         git_footer_html();
5063 }
5064
5065 sub git_blame_common {
5066         my $format = shift || 'porcelain';
5067         if ($format eq 'porcelain' && $cgi->param('js')) {
5068                 $format = 'incremental';
5069                 $action = 'blame_incremental'; # for page title etc
5070         }
5071
5072         # permissions
5073         gitweb_check_feature('blame')
5074                 or die_error(403, "Blame view not allowed");
5075
5076         # error checking
5077         die_error(400, "No file name given") unless $file_name;
5078         $hash_base ||= git_get_head_hash($project);
5079         die_error(404, "Couldn't find base commit") unless $hash_base;
5080         my %co = parse_commit($hash_base)
5081                 or die_error(404, "Commit not found");
5082         my $ftype = "blob";
5083         if (!defined $hash) {
5084                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5085                         or die_error(404, "Error looking up file");
5086         } else {
5087                 $ftype = git_get_type($hash);
5088                 if ($ftype !~ "blob") {
5089                         die_error(400, "Object is not a blob");
5090                 }
5091         }
5092
5093         my $fd;
5094         if ($format eq 'incremental') {
5095                 # get file contents (as base)
5096                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5097                         or die_error(500, "Open git-cat-file failed");
5098         } elsif ($format eq 'data') {
5099                 # run git-blame --incremental
5100                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5101                         $hash_base, "--", $file_name
5102                         or die_error(500, "Open git-blame --incremental failed");
5103         } else {
5104                 # run git-blame --porcelain
5105                 open $fd, "-|", git_cmd(), "blame", '-p',
5106                         $hash_base, '--', $file_name
5107                         or die_error(500, "Open git-blame --porcelain failed");
5108         }
5109
5110         # incremental blame data returns early
5111         if ($format eq 'data') {
5112                 print $cgi->header(
5113                         -type=>"text/plain", -charset => "utf-8",
5114                         -status=> "200 OK");
5115                 local $| = 1; # output autoflush
5116                 print while <$fd>;
5117                 close $fd
5118                         or print "ERROR $!\n";
5119
5120                 print 'END';
5121                 if (defined $t0 && gitweb_check_feature('timed')) {
5122                         print ' '.
5123                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5124                               ' '.$number_of_git_cmds;
5125                 }
5126                 print "\n";
5127
5128                 return;
5129         }
5130
5131         # page header
5132         git_header_html();
5133         my $formats_nav =
5134                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5135                         "blob") .
5136                 " | ";
5137         if ($format eq 'incremental') {
5138                 $formats_nav .=
5139                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5140                                 "blame") . " (non-incremental)";
5141         } else {
5142                 $formats_nav .=
5143                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5144                                 "blame") . " (incremental)";
5145         }
5146         $formats_nav .=
5147                 " | " .
5148                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5149                         "history") .
5150                 " | " .
5151                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5152                         "HEAD");
5153         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5154         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5155         git_print_page_path($file_name, $ftype, $hash_base);
5156
5157         # page body
5158         if ($format eq 'incremental') {
5159                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5160                       "This page requires JavaScript to run.\n Use ".
5161                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5162                               'this page').
5163                       " instead.\n".
5164                       "</b></center></div>\n</noscript>\n";
5165
5166                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5167         }
5168
5169         print qq!<div class="page_body">\n!;
5170         print qq!<div id="progress_info">... / ...</div>\n!
5171                 if ($format eq 'incremental');
5172         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5173               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5174               qq!<thead>\n!.
5175               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5176               qq!</thead>\n!.
5177               qq!<tbody>\n!;
5178
5179         my @rev_color = qw(light dark);
5180         my $num_colors = scalar(@rev_color);
5181         my $current_color = 0;
5182
5183         if ($format eq 'incremental') {
5184                 my $color_class = $rev_color[$current_color];
5185
5186                 #contents of a file
5187                 my $linenr = 0;
5188         LINE:
5189                 while (my $line = <$fd>) {
5190                         chomp $line;
5191                         $linenr++;
5192
5193                         print qq!<tr id="l$linenr" class="$color_class">!.
5194                               qq!<td class="sha1"><a href=""> </a></td>!.
5195                               qq!<td class="linenr">!.
5196                               qq!<a class="linenr" href="">$linenr</a></td>!;
5197                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5198                         print qq!</tr>\n!;
5199                 }
5200
5201         } else { # porcelain, i.e. ordinary blame
5202                 my %metainfo = (); # saves information about commits
5203
5204                 # blame data
5205         LINE:
5206                 while (my $line = <$fd>) {
5207                         chomp $line;
5208                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5209                         # no <lines in group> for subsequent lines in group of lines
5210                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5211                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5212                         if (!exists $metainfo{$full_rev}) {
5213                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5214                         }
5215                         my $meta = $metainfo{$full_rev};
5216                         my $data;
5217                         while ($data = <$fd>) {
5218                                 chomp $data;
5219                                 last if ($data =~ s/^\t//); # contents of line
5220                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5221                                         $meta->{$1} = $2 unless exists $meta->{$1};
5222                                 }
5223                                 if ($data =~ /^previous /) {
5224                                         $meta->{'nprevious'}++;
5225                                 }
5226                         }
5227                         my $short_rev = substr($full_rev, 0, 8);
5228                         my $author = $meta->{'author'};
5229                         my %date =
5230                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5231                         my $date = $date{'iso-tz'};
5232                         if ($group_size) {
5233                                 $current_color = ($current_color + 1) % $num_colors;
5234                         }
5235                         my $tr_class = $rev_color[$current_color];
5236                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5237                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5238                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5239                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5240                         if ($group_size) {
5241                                 print "<td class=\"sha1\"";
5242                                 print " title=\"". esc_html($author) . ", $date\"";
5243                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5244                                 print ">";
5245                                 print $cgi->a({-href => href(action=>"commit",
5246                                                              hash=>$full_rev,
5247                                                              file_name=>$file_name)},
5248                                               esc_html($short_rev));
5249                                 if ($group_size >= 2) {
5250                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5251                                         if (@author_initials) {
5252                                                 print "<br />" .
5253                                                       esc_html(join('', @author_initials));
5254                                                 #           or join('.', ...)
5255                                         }
5256                                 }
5257                                 print "</td>\n";
5258                         }
5259                         # 'previous' <sha1 of parent commit> <filename at commit>
5260                         if (exists $meta->{'previous'} &&
5261                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5262                                 $meta->{'parent'} = $1;
5263                                 $meta->{'file_parent'} = unquote($2);
5264                         }
5265                         my $linenr_commit =
5266                                 exists($meta->{'parent'}) ?
5267                                 $meta->{'parent'} : $full_rev;
5268                         my $linenr_filename =
5269                                 exists($meta->{'file_parent'}) ?
5270                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5271                         my $blamed = href(action => 'blame',
5272                                           file_name => $linenr_filename,
5273                                           hash_base => $linenr_commit);
5274                         print "<td class=\"linenr\">";
5275                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5276                                         -class => "linenr" },
5277                                       esc_html($lineno));
5278                         print "</td>";
5279                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5280                         print "</tr>\n";
5281                 } # end while
5282
5283         }
5284
5285         # footer
5286         print "</tbody>\n".
5287               "</table>\n"; # class="blame"
5288         print "</div>\n";   # class="blame_body"
5289         close $fd
5290                 or print "Reading blob failed\n";
5291
5292         git_footer_html();
5293 }
5294
5295 sub git_blame {
5296         git_blame_common();
5297 }
5298
5299 sub git_blame_incremental {
5300         git_blame_common('incremental');
5301 }
5302
5303 sub git_blame_data {
5304         git_blame_common('data');
5305 }
5306
5307 sub git_tags {
5308         my $head = git_get_head_hash($project);
5309         git_header_html();
5310         git_print_page_nav('','', $head,undef,$head);
5311         git_print_header_div('summary', $project);
5312
5313         my @tagslist = git_get_tags_list();
5314         if (@tagslist) {
5315                 git_tags_body(\@tagslist);
5316         }
5317         git_footer_html();
5318 }
5319
5320 sub git_heads {
5321         my $head = git_get_head_hash($project);
5322         git_header_html();
5323         git_print_page_nav('','', $head,undef,$head);
5324         git_print_header_div('summary', $project);
5325
5326         my @headslist = git_get_heads_list();
5327         if (@headslist) {
5328                 git_heads_body(\@headslist, $head);
5329         }
5330         git_footer_html();
5331 }
5332
5333 sub git_blob_plain {
5334         my $type = shift;
5335         my $expires;
5336
5337         if (!defined $hash) {
5338                 if (defined $file_name) {
5339                         my $base = $hash_base || git_get_head_hash($project);
5340                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5341                                 or die_error(404, "Cannot find file");
5342                 } else {
5343                         die_error(400, "No file name defined");
5344                 }
5345         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5346                 # blobs defined by non-textual hash id's can be cached
5347                 $expires = "+1d";
5348         }
5349
5350         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5351                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5352
5353         # content-type (can include charset)
5354         $type = blob_contenttype($fd, $file_name, $type);
5355
5356         # "save as" filename, even when no $file_name is given
5357         my $save_as = "$hash";
5358         if (defined $file_name) {
5359                 $save_as = $file_name;
5360         } elsif ($type =~ m/^text\//) {
5361                 $save_as .= '.txt';
5362         }
5363
5364         # With XSS prevention on, blobs of all types except a few known safe
5365         # ones are served with "Content-Disposition: attachment" to make sure
5366         # they don't run in our security domain.  For certain image types,
5367         # blob view writes an <img> tag referring to blob_plain view, and we
5368         # want to be sure not to break that by serving the image as an
5369         # attachment (though Firefox 3 doesn't seem to care).
5370         my $sandbox = $prevent_xss &&
5371                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5372
5373         print $cgi->header(
5374                 -type => $type,
5375                 -expires => $expires,
5376                 -content_disposition =>
5377                         ($sandbox ? 'attachment' : 'inline')
5378                         . '; filename="' . $save_as . '"');
5379         local $/ = undef;
5380         binmode STDOUT, ':raw';
5381         print <$fd>;
5382         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5383         close $fd;
5384 }
5385
5386 sub git_blob {
5387         my $expires;
5388
5389         if (!defined $hash) {
5390                 if (defined $file_name) {
5391                         my $base = $hash_base || git_get_head_hash($project);
5392                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5393                                 or die_error(404, "Cannot find file");
5394                 } else {
5395                         die_error(400, "No file name defined");
5396                 }
5397         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5398                 # blobs defined by non-textual hash id's can be cached
5399                 $expires = "+1d";
5400         }
5401
5402         my $have_blame = gitweb_check_feature('blame');
5403         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5404                 or die_error(500, "Couldn't cat $file_name, $hash");
5405         my $mimetype = blob_mimetype($fd, $file_name);
5406         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5407                 close $fd;
5408                 return git_blob_plain($mimetype);
5409         }
5410         # we can have blame only for text/* mimetype
5411         $have_blame &&= ($mimetype =~ m!^text/!);
5412
5413         git_header_html(undef, $expires);
5414         my $formats_nav = '';
5415         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5416                 if (defined $file_name) {
5417                         if ($have_blame) {
5418                                 $formats_nav .=
5419                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5420                                                 "blame") .
5421                                         " | ";
5422                         }
5423                         $formats_nav .=
5424                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5425                                         "history") .
5426                                 " | " .
5427                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5428                                         "raw") .
5429                                 " | " .
5430                                 $cgi->a({-href => href(action=>"blob",
5431                                                        hash_base=>"HEAD", file_name=>$file_name)},
5432                                         "HEAD");
5433                 } else {
5434                         $formats_nav .=
5435                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5436                                         "raw");
5437                 }
5438                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5439                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5440         } else {
5441                 print "<div class=\"page_nav\">\n" .
5442                       "<br/><br/></div>\n" .
5443                       "<div class=\"title\">$hash</div>\n";
5444         }
5445         git_print_page_path($file_name, "blob", $hash_base);
5446         print "<div class=\"page_body\">\n";
5447         if ($mimetype =~ m!^image/!) {
5448                 print qq!<img type="$mimetype"!;
5449                 if ($file_name) {
5450                         print qq! alt="$file_name" title="$file_name"!;
5451                 }
5452                 print qq! src="! .
5453                       href(action=>"blob_plain", hash=>$hash,
5454                            hash_base=>$hash_base, file_name=>$file_name) .
5455                       qq!" />\n!;
5456         } else {
5457                 my $nr;
5458                 while (my $line = <$fd>) {
5459                         chomp $line;
5460                         $nr++;
5461                         $line = untabify($line);
5462                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5463                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5464                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5465                 }
5466         }
5467         close $fd
5468                 or print "Reading blob failed.\n";
5469         print "</div>";
5470         git_footer_html();
5471 }
5472
5473 sub git_tree {
5474         if (!defined $hash_base) {
5475                 $hash_base = "HEAD";
5476         }
5477         if (!defined $hash) {
5478                 if (defined $file_name) {
5479                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5480                 } else {
5481                         $hash = $hash_base;
5482                 }
5483         }
5484         die_error(404, "No such tree") unless defined($hash);
5485
5486         my $show_sizes = gitweb_check_feature('show-sizes');
5487         my $have_blame = gitweb_check_feature('blame');
5488
5489         my @entries = ();
5490         {
5491                 local $/ = "\0";
5492                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5493                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5494                         or die_error(500, "Open git-ls-tree failed");
5495                 @entries = map { chomp; $_ } <$fd>;
5496                 close $fd
5497                         or die_error(404, "Reading tree failed");
5498         }
5499
5500         my $refs = git_get_references();
5501         my $ref = format_ref_marker($refs, $hash_base);
5502         git_header_html();
5503         my $basedir = '';
5504         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5505                 my @views_nav = ();
5506                 if (defined $file_name) {
5507                         push @views_nav,
5508                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5509                                         "history"),
5510                                 $cgi->a({-href => href(action=>"tree",
5511                                                        hash_base=>"HEAD", file_name=>$file_name)},
5512                                         "HEAD"),
5513                 }
5514                 my $snapshot_links = format_snapshot_links($hash);
5515                 if (defined $snapshot_links) {
5516                         # FIXME: Should be available when we have no hash base as well.
5517                         push @views_nav, $snapshot_links;
5518                 }
5519                 git_print_page_nav('tree','', $hash_base, undef, undef,
5520                                    join(' | ', @views_nav));
5521                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5522         } else {
5523                 undef $hash_base;
5524                 print "<div class=\"page_nav\">\n";
5525                 print "<br/><br/></div>\n";
5526                 print "<div class=\"title\">$hash</div>\n";
5527         }
5528         if (defined $file_name) {
5529                 $basedir = $file_name;
5530                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5531                         $basedir .= '/';
5532                 }
5533                 git_print_page_path($file_name, 'tree', $hash_base);
5534         }
5535         print "<div class=\"page_body\">\n";
5536         print "<table class=\"tree\">\n";
5537         my $alternate = 1;
5538         # '..' (top directory) link if possible
5539         if (defined $hash_base &&
5540             defined $file_name && $file_name =~ m![^/]+$!) {
5541                 if ($alternate) {
5542                         print "<tr class=\"dark\">\n";
5543                 } else {
5544                         print "<tr class=\"light\">\n";
5545                 }
5546                 $alternate ^= 1;
5547
5548                 my $up = $file_name;
5549                 $up =~ s!/?[^/]+$!!;
5550                 undef $up unless $up;
5551                 # based on git_print_tree_entry
5552                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5553                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5554                 print '<td class="list">';
5555                 print $cgi->a({-href => href(action=>"tree",
5556                                              hash_base=>$hash_base,
5557                                              file_name=>$up)},
5558                               "..");
5559                 print "</td>\n";
5560                 print "<td class=\"link\"></td>\n";
5561
5562                 print "</tr>\n";
5563         }
5564         foreach my $line (@entries) {
5565                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5566
5567                 if ($alternate) {
5568                         print "<tr class=\"dark\">\n";
5569                 } else {
5570                         print "<tr class=\"light\">\n";
5571                 }
5572                 $alternate ^= 1;
5573
5574                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5575
5576                 print "</tr>\n";
5577         }
5578         print "</table>\n" .
5579               "</div>";
5580         git_footer_html();
5581 }
5582
5583 sub snapshot_name {
5584         my ($project, $hash) = @_;
5585
5586         # path/to/project.git  -> project
5587         # path/to/project/.git -> project
5588         my $name = to_utf8($project);
5589         $name =~ s,([^/])/*\.git$,$1,;
5590         $name = basename($name);
5591         # sanitize name
5592         $name =~ s/[[:cntrl:]]/?/g;
5593
5594         my $ver = $hash;
5595         if ($hash =~ /^[0-9a-fA-F]+$/) {
5596                 # shorten SHA-1 hash
5597                 my $full_hash = git_get_full_hash($project, $hash);
5598                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5599                         $ver = git_get_short_hash($project, $hash);
5600                 }
5601         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5602                 # tags don't need shortened SHA-1 hash
5603                 $ver = $1;
5604         } else {
5605                 # branches and other need shortened SHA-1 hash
5606                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5607                         $ver = $1;
5608                 }
5609                 $ver .= '-' . git_get_short_hash($project, $hash);
5610         }
5611         # in case of hierarchical branch names
5612         $ver =~ s!/!.!g;
5613
5614         # name = project-version_string
5615         $name = "$name-$ver";
5616
5617         return wantarray ? ($name, $name) : $name;
5618 }
5619
5620 sub git_snapshot {
5621         my $format = $input_params{'snapshot_format'};
5622         if (!@snapshot_fmts) {
5623                 die_error(403, "Snapshots not allowed");
5624         }
5625         # default to first supported snapshot format
5626         $format ||= $snapshot_fmts[0];
5627         if ($format !~ m/^[a-z0-9]+$/) {
5628                 die_error(400, "Invalid snapshot format parameter");
5629         } elsif (!exists($known_snapshot_formats{$format})) {
5630                 die_error(400, "Unknown snapshot format");
5631         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5632                 die_error(403, "Snapshot format not allowed");
5633         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5634                 die_error(403, "Unsupported snapshot format");
5635         }
5636
5637         my $type = git_get_type("$hash^{}");
5638         if (!$type) {
5639                 die_error(404, 'Object does not exist');
5640         }  elsif ($type eq 'blob') {
5641                 die_error(400, 'Object is not a tree-ish');
5642         }
5643
5644         my ($name, $prefix) = snapshot_name($project, $hash);
5645         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5646         my $cmd = quote_command(
5647                 git_cmd(), 'archive',
5648                 "--format=$known_snapshot_formats{$format}{'format'}",
5649                 "--prefix=$prefix/", $hash);
5650         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5651                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5652         }
5653
5654         $filename =~ s/(["\\])/\\$1/g;
5655         print $cgi->header(
5656                 -type => $known_snapshot_formats{$format}{'type'},
5657                 -content_disposition => 'inline; filename="' . $filename . '"',
5658                 -status => '200 OK');
5659
5660         open my $fd, "-|", $cmd
5661                 or die_error(500, "Execute git-archive failed");
5662         binmode STDOUT, ':raw';
5663         print <$fd>;
5664         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5665         close $fd;
5666 }
5667
5668 sub git_log_generic {
5669         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5670
5671         my $head = git_get_head_hash($project);
5672         if (!defined $base) {
5673                 $base = $head;
5674         }
5675         if (!defined $page) {
5676                 $page = 0;
5677         }
5678         my $refs = git_get_references();
5679
5680         my $commit_hash = $base;
5681         if (defined $parent) {
5682                 $commit_hash = "$parent..$base";
5683         }
5684         my @commitlist =
5685                 parse_commits($commit_hash, 101, (100 * $page),
5686                               defined $file_name ? ($file_name, "--full-history") : ());
5687
5688         my $ftype;
5689         if (!defined $file_hash && defined $file_name) {
5690                 # some commits could have deleted file in question,
5691                 # and not have it in tree, but one of them has to have it
5692                 for (my $i = 0; $i < @commitlist; $i++) {
5693                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5694                         last if defined $file_hash;
5695                 }
5696         }
5697         if (defined $file_hash) {
5698                 $ftype = git_get_type($file_hash);
5699         }
5700         if (defined $file_name && !defined $ftype) {
5701                 die_error(500, "Unknown type of object");
5702         }
5703         my %co;
5704         if (defined $file_name) {
5705                 %co = parse_commit($base)
5706                         or die_error(404, "Unknown commit object");
5707         }
5708
5709
5710         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5711         my $next_link = '';
5712         if ($#commitlist >= 100) {
5713                 $next_link =
5714                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5715                                  -accesskey => "n", -title => "Alt-n"}, "next");
5716         }
5717         my $patch_max = gitweb_get_feature('patches');
5718         if ($patch_max && !defined $file_name) {
5719                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5720                         $paging_nav .= " &sdot; " .
5721                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5722                                         "patches");
5723                 }
5724         }
5725
5726         git_header_html();
5727         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5728         if (defined $file_name) {
5729                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5730         } else {
5731                 git_print_header_div('summary', $project)
5732         }
5733         git_print_page_path($file_name, $ftype, $hash_base)
5734                 if (defined $file_name);
5735
5736         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5737                      $file_name, $file_hash, $ftype);
5738
5739         git_footer_html();
5740 }
5741
5742 sub git_log {
5743         git_log_generic('log', \&git_log_body,
5744                         $hash, $hash_parent);
5745 }
5746
5747 sub git_commit {
5748         $hash ||= $hash_base || "HEAD";
5749         my %co = parse_commit($hash)
5750             or die_error(404, "Unknown commit object");
5751
5752         my $parent  = $co{'parent'};
5753         my $parents = $co{'parents'}; # listref
5754
5755         # we need to prepare $formats_nav before any parameter munging
5756         my $formats_nav;
5757         if (!defined $parent) {
5758                 # --root commitdiff
5759                 $formats_nav .= '(initial)';
5760         } elsif (@$parents == 1) {
5761                 # single parent commit
5762                 $formats_nav .=
5763                         '(parent: ' .
5764                         $cgi->a({-href => href(action=>"commit",
5765                                                hash=>$parent)},
5766                                 esc_html(substr($parent, 0, 7))) .
5767                         ')';
5768         } else {
5769                 # merge commit
5770                 $formats_nav .=
5771                         '(merge: ' .
5772                         join(' ', map {
5773                                 $cgi->a({-href => href(action=>"commit",
5774                                                        hash=>$_)},
5775                                         esc_html(substr($_, 0, 7)));
5776                         } @$parents ) .
5777                         ')';
5778         }
5779         if (gitweb_check_feature('patches') && @$parents <= 1) {
5780                 $formats_nav .= " | " .
5781                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5782                                 "patch");
5783         }
5784
5785         if (!defined $parent) {
5786                 $parent = "--root";
5787         }
5788         my @difftree;
5789         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5790                 @diff_opts,
5791                 (@$parents <= 1 ? $parent : '-c'),
5792                 $hash, "--"
5793                 or die_error(500, "Open git-diff-tree failed");
5794         @difftree = map { chomp; $_ } <$fd>;
5795         close $fd or die_error(404, "Reading git-diff-tree failed");
5796
5797         # non-textual hash id's can be cached
5798         my $expires;
5799         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5800                 $expires = "+1d";
5801         }
5802         my $refs = git_get_references();
5803         my $ref = format_ref_marker($refs, $co{'id'});
5804
5805         git_header_html(undef, $expires);
5806         git_print_page_nav('commit', '',
5807                            $hash, $co{'tree'}, $hash,
5808                            $formats_nav);
5809
5810         if (defined $co{'parent'}) {
5811                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5812         } else {
5813                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5814         }
5815         print "<div class=\"title_text\">\n" .
5816               "<table class=\"object_header\">\n";
5817         git_print_authorship_rows(\%co);
5818         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5819         print "<tr>" .
5820               "<td>tree</td>" .
5821               "<td class=\"sha1\">" .
5822               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5823                        class => "list"}, $co{'tree'}) .
5824               "</td>" .
5825               "<td class=\"link\">" .
5826               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5827                       "tree");
5828         my $snapshot_links = format_snapshot_links($hash);
5829         if (defined $snapshot_links) {
5830                 print " | " . $snapshot_links;
5831         }
5832         print "</td>" .
5833               "</tr>\n";
5834
5835         foreach my $par (@$parents) {
5836                 print "<tr>" .
5837                       "<td>parent</td>" .
5838                       "<td class=\"sha1\">" .
5839                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5840                                class => "list"}, $par) .
5841                       "</td>" .
5842                       "<td class=\"link\">" .
5843                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5844                       " | " .
5845                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5846                       "</td>" .
5847                       "</tr>\n";
5848         }
5849         print "</table>".
5850               "</div>\n";
5851
5852         print "<div class=\"page_body\">\n";
5853         git_print_log($co{'comment'});
5854         print "</div>\n";
5855
5856         git_difftree_body(\@difftree, $hash, @$parents);
5857
5858         git_footer_html();
5859 }
5860
5861 sub git_object {
5862         # object is defined by:
5863         # - hash or hash_base alone
5864         # - hash_base and file_name
5865         my $type;
5866
5867         # - hash or hash_base alone
5868         if ($hash || ($hash_base && !defined $file_name)) {
5869                 my $object_id = $hash || $hash_base;
5870
5871                 open my $fd, "-|", quote_command(
5872                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5873                         or die_error(404, "Object does not exist");
5874                 $type = <$fd>;
5875                 chomp $type;
5876                 close $fd
5877                         or die_error(404, "Object does not exist");
5878
5879         # - hash_base and file_name
5880         } elsif ($hash_base && defined $file_name) {
5881                 $file_name =~ s,/+$,,;
5882
5883                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5884                         or die_error(404, "Base object does not exist");
5885
5886                 # here errors should not hapen
5887                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5888                         or die_error(500, "Open git-ls-tree failed");
5889                 my $line = <$fd>;
5890                 close $fd;
5891
5892                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5893                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5894                         die_error(404, "File or directory for given base does not exist");
5895                 }
5896                 $type = $2;
5897                 $hash = $3;
5898         } else {
5899                 die_error(400, "Not enough information to find object");
5900         }
5901
5902         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5903                                           hash=>$hash, hash_base=>$hash_base,
5904                                           file_name=>$file_name),
5905                              -status => '302 Found');
5906 }
5907
5908 sub git_blobdiff {
5909         my $format = shift || 'html';
5910
5911         my $fd;
5912         my @difftree;
5913         my %diffinfo;
5914         my $expires;
5915
5916         # preparing $fd and %diffinfo for git_patchset_body
5917         # new style URI
5918         if (defined $hash_base && defined $hash_parent_base) {
5919                 if (defined $file_name) {
5920                         # read raw output
5921                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5922                                 $hash_parent_base, $hash_base,
5923                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5924                                 or die_error(500, "Open git-diff-tree failed");
5925                         @difftree = map { chomp; $_ } <$fd>;
5926                         close $fd
5927                                 or die_error(404, "Reading git-diff-tree failed");
5928                         @difftree
5929                                 or die_error(404, "Blob diff not found");
5930
5931                 } elsif (defined $hash &&
5932                          $hash =~ /[0-9a-fA-F]{40}/) {
5933                         # try to find filename from $hash
5934
5935                         # read filtered raw output
5936                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5937                                 $hash_parent_base, $hash_base, "--"
5938                                 or die_error(500, "Open git-diff-tree failed");
5939                         @difftree =
5940                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5941                                 # $hash == to_id
5942                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5943                                 map { chomp; $_ } <$fd>;
5944                         close $fd
5945                                 or die_error(404, "Reading git-diff-tree failed");
5946                         @difftree
5947                                 or die_error(404, "Blob diff not found");
5948
5949                 } else {
5950                         die_error(400, "Missing one of the blob diff parameters");
5951                 }
5952
5953                 if (@difftree > 1) {
5954                         die_error(400, "Ambiguous blob diff specification");
5955                 }
5956
5957                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5958                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5959                 $file_name   ||= $diffinfo{'to_file'};
5960
5961                 $hash_parent ||= $diffinfo{'from_id'};
5962                 $hash        ||= $diffinfo{'to_id'};
5963
5964                 # non-textual hash id's can be cached
5965                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5966                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5967                         $expires = '+1d';
5968                 }
5969
5970                 # open patch output
5971                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5972                         '-p', ($format eq 'html' ? "--full-index" : ()),
5973                         $hash_parent_base, $hash_base,
5974                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5975                         or die_error(500, "Open git-diff-tree failed");
5976         }
5977
5978         # old/legacy style URI -- not generated anymore since 1.4.3.
5979         if (!%diffinfo) {
5980                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5981         }
5982
5983         # header
5984         if ($format eq 'html') {
5985                 my $formats_nav =
5986                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5987                                 "raw");
5988                 git_header_html(undef, $expires);
5989                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5990                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5991                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5992                 } else {
5993                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5994                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5995                 }
5996                 if (defined $file_name) {
5997                         git_print_page_path($file_name, "blob", $hash_base);
5998                 } else {
5999                         print "<div class=\"page_path\"></div>\n";
6000                 }
6001
6002         } elsif ($format eq 'plain') {
6003                 print $cgi->header(
6004                         -type => 'text/plain',
6005                         -charset => 'utf-8',
6006                         -expires => $expires,
6007                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6008
6009                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6010
6011         } else {
6012                 die_error(400, "Unknown blobdiff format");
6013         }
6014
6015         # patch
6016         if ($format eq 'html') {
6017                 print "<div class=\"page_body\">\n";
6018
6019                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6020                 close $fd;
6021
6022                 print "</div>\n"; # class="page_body"
6023                 git_footer_html();
6024
6025         } else {
6026                 while (my $line = <$fd>) {
6027                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6028                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6029
6030                         print $line;
6031
6032                         last if $line =~ m!^\+\+\+!;
6033                 }
6034                 local $/ = undef;
6035                 print <$fd>;
6036                 close $fd;
6037         }
6038 }
6039
6040 sub git_blobdiff_plain {
6041         git_blobdiff('plain');
6042 }
6043
6044 sub git_commitdiff {
6045         my %params = @_;
6046         my $format = $params{-format} || 'html';
6047
6048         my ($patch_max) = gitweb_get_feature('patches');
6049         if ($format eq 'patch') {
6050                 die_error(403, "Patch view not allowed") unless $patch_max;
6051         }
6052
6053         $hash ||= $hash_base || "HEAD";
6054         my %co = parse_commit($hash)
6055             or die_error(404, "Unknown commit object");
6056
6057         # choose format for commitdiff for merge
6058         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6059                 $hash_parent = '--cc';
6060         }
6061         # we need to prepare $formats_nav before almost any parameter munging
6062         my $formats_nav;
6063         if ($format eq 'html') {
6064                 $formats_nav =
6065                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6066                                 "raw");
6067                 if ($patch_max && @{$co{'parents'}} <= 1) {
6068                         $formats_nav .= " | " .
6069                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6070                                         "patch");
6071                 }
6072
6073                 if (defined $hash_parent &&
6074                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6075                         # commitdiff with two commits given
6076                         my $hash_parent_short = $hash_parent;
6077                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6078                                 $hash_parent_short = substr($hash_parent, 0, 7);
6079                         }
6080                         $formats_nav .=
6081                                 ' (from';
6082                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6083                                 if ($co{'parents'}[$i] eq $hash_parent) {
6084                                         $formats_nav .= ' parent ' . ($i+1);
6085                                         last;
6086                                 }
6087                         }
6088                         $formats_nav .= ': ' .
6089                                 $cgi->a({-href => href(action=>"commitdiff",
6090                                                        hash=>$hash_parent)},
6091                                         esc_html($hash_parent_short)) .
6092                                 ')';
6093                 } elsif (!$co{'parent'}) {
6094                         # --root commitdiff
6095                         $formats_nav .= ' (initial)';
6096                 } elsif (scalar @{$co{'parents'}} == 1) {
6097                         # single parent commit
6098                         $formats_nav .=
6099                                 ' (parent: ' .
6100                                 $cgi->a({-href => href(action=>"commitdiff",
6101                                                        hash=>$co{'parent'})},
6102                                         esc_html(substr($co{'parent'}, 0, 7))) .
6103                                 ')';
6104                 } else {
6105                         # merge commit
6106                         if ($hash_parent eq '--cc') {
6107                                 $formats_nav .= ' | ' .
6108                                         $cgi->a({-href => href(action=>"commitdiff",
6109                                                                hash=>$hash, hash_parent=>'-c')},
6110                                                 'combined');
6111                         } else { # $hash_parent eq '-c'
6112                                 $formats_nav .= ' | ' .
6113                                         $cgi->a({-href => href(action=>"commitdiff",
6114                                                                hash=>$hash, hash_parent=>'--cc')},
6115                                                 'compact');
6116                         }
6117                         $formats_nav .=
6118                                 ' (merge: ' .
6119                                 join(' ', map {
6120                                         $cgi->a({-href => href(action=>"commitdiff",
6121                                                                hash=>$_)},
6122                                                 esc_html(substr($_, 0, 7)));
6123                                 } @{$co{'parents'}} ) .
6124                                 ')';
6125                 }
6126         }
6127
6128         my $hash_parent_param = $hash_parent;
6129         if (!defined $hash_parent_param) {
6130                 # --cc for multiple parents, --root for parentless
6131                 $hash_parent_param =
6132                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6133         }
6134
6135         # read commitdiff
6136         my $fd;
6137         my @difftree;
6138         if ($format eq 'html') {
6139                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6140                         "--no-commit-id", "--patch-with-raw", "--full-index",
6141                         $hash_parent_param, $hash, "--"
6142                         or die_error(500, "Open git-diff-tree failed");
6143
6144                 while (my $line = <$fd>) {
6145                         chomp $line;
6146                         # empty line ends raw part of diff-tree output
6147                         last unless $line;
6148                         push @difftree, scalar parse_difftree_raw_line($line);
6149                 }
6150
6151         } elsif ($format eq 'plain') {
6152                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6153                         '-p', $hash_parent_param, $hash, "--"
6154                         or die_error(500, "Open git-diff-tree failed");
6155         } elsif ($format eq 'patch') {
6156                 # For commit ranges, we limit the output to the number of
6157                 # patches specified in the 'patches' feature.
6158                 # For single commits, we limit the output to a single patch,
6159                 # diverging from the git-format-patch default.
6160                 my @commit_spec = ();
6161                 if ($hash_parent) {
6162                         if ($patch_max > 0) {
6163                                 push @commit_spec, "-$patch_max";
6164                         }
6165                         push @commit_spec, '-n', "$hash_parent..$hash";
6166                 } else {
6167                         if ($params{-single}) {
6168                                 push @commit_spec, '-1';
6169                         } else {
6170                                 if ($patch_max > 0) {
6171                                         push @commit_spec, "-$patch_max";
6172                                 }
6173                                 push @commit_spec, "-n";
6174                         }
6175                         push @commit_spec, '--root', $hash;
6176                 }
6177                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6178                         '--stdout', @commit_spec
6179                         or die_error(500, "Open git-format-patch failed");
6180         } else {
6181                 die_error(400, "Unknown commitdiff format");
6182         }
6183
6184         # non-textual hash id's can be cached
6185         my $expires;
6186         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6187                 $expires = "+1d";
6188         }
6189
6190         # write commit message
6191         if ($format eq 'html') {
6192                 my $refs = git_get_references();
6193                 my $ref = format_ref_marker($refs, $co{'id'});
6194
6195                 git_header_html(undef, $expires);
6196                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6197                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6198                 print "<div class=\"title_text\">\n" .
6199                       "<table class=\"object_header\">\n";
6200                 git_print_authorship_rows(\%co);
6201                 print "</table>".
6202                       "</div>\n";
6203                 print "<div class=\"page_body\">\n";
6204                 if (@{$co{'comment'}} > 1) {
6205                         print "<div class=\"log\">\n";
6206                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6207                         print "</div>\n"; # class="log"
6208                 }
6209
6210         } elsif ($format eq 'plain') {
6211                 my $refs = git_get_references("tags");
6212                 my $tagname = git_get_rev_name_tags($hash);
6213                 my $filename = basename($project) . "-$hash.patch";
6214
6215                 print $cgi->header(
6216                         -type => 'text/plain',
6217                         -charset => 'utf-8',
6218                         -expires => $expires,
6219                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6220                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6221                 print "From: " . to_utf8($co{'author'}) . "\n";
6222                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6223                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6224
6225                 print "X-Git-Tag: $tagname\n" if $tagname;
6226                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6227
6228                 foreach my $line (@{$co{'comment'}}) {
6229                         print to_utf8($line) . "\n";
6230                 }
6231                 print "---\n\n";
6232         } elsif ($format eq 'patch') {
6233                 my $filename = basename($project) . "-$hash.patch";
6234
6235                 print $cgi->header(
6236                         -type => 'text/plain',
6237                         -charset => 'utf-8',
6238                         -expires => $expires,
6239                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6240         }
6241
6242         # write patch
6243         if ($format eq 'html') {
6244                 my $use_parents = !defined $hash_parent ||
6245                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6246                 git_difftree_body(\@difftree, $hash,
6247                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6248                 print "<br/>\n";
6249
6250                 git_patchset_body($fd, \@difftree, $hash,
6251                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6252                 close $fd;
6253                 print "</div>\n"; # class="page_body"
6254                 git_footer_html();
6255
6256         } elsif ($format eq 'plain') {
6257                 local $/ = undef;
6258                 print <$fd>;
6259                 close $fd
6260                         or print "Reading git-diff-tree failed\n";
6261         } elsif ($format eq 'patch') {
6262                 local $/ = undef;
6263                 print <$fd>;
6264                 close $fd
6265                         or print "Reading git-format-patch failed\n";
6266         }
6267 }
6268
6269 sub git_commitdiff_plain {
6270         git_commitdiff(-format => 'plain');
6271 }
6272
6273 # format-patch-style patches
6274 sub git_patch {
6275         git_commitdiff(-format => 'patch', -single => 1);
6276 }
6277
6278 sub git_patches {
6279         git_commitdiff(-format => 'patch');
6280 }
6281
6282 sub git_history {
6283         git_log_generic('history', \&git_history_body,
6284                         $hash_base, $hash_parent_base,
6285                         $file_name, $hash);
6286 }
6287
6288 sub git_search {
6289         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6290         if (!defined $searchtext) {
6291                 die_error(400, "Text field is empty");
6292         }
6293         if (!defined $hash) {
6294                 $hash = git_get_head_hash($project);
6295         }
6296         my %co = parse_commit($hash);
6297         if (!%co) {
6298                 die_error(404, "Unknown commit object");
6299         }
6300         if (!defined $page) {
6301                 $page = 0;
6302         }
6303
6304         $searchtype ||= 'commit';
6305         if ($searchtype eq 'pickaxe') {
6306                 # pickaxe may take all resources of your box and run for several minutes
6307                 # with every query - so decide by yourself how public you make this feature
6308                 gitweb_check_feature('pickaxe')
6309                     or die_error(403, "Pickaxe is disabled");
6310         }
6311         if ($searchtype eq 'grep') {
6312                 gitweb_check_feature('grep')
6313                     or die_error(403, "Grep is disabled");
6314         }
6315
6316         git_header_html();
6317
6318         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6319                 my $greptype;
6320                 if ($searchtype eq 'commit') {
6321                         $greptype = "--grep=";
6322                 } elsif ($searchtype eq 'author') {
6323                         $greptype = "--author=";
6324                 } elsif ($searchtype eq 'committer') {
6325                         $greptype = "--committer=";
6326                 }
6327                 $greptype .= $searchtext;
6328                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6329                                                $greptype, '--regexp-ignore-case',
6330                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6331
6332                 my $paging_nav = '';
6333                 if ($page > 0) {
6334                         $paging_nav .=
6335                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6336                                                        searchtext=>$searchtext,
6337                                                        searchtype=>$searchtype)},
6338                                         "first");
6339                         $paging_nav .= " &sdot; " .
6340                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6341                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6342                 } else {
6343                         $paging_nav .= "first";
6344                         $paging_nav .= " &sdot; prev";
6345                 }
6346                 my $next_link = '';
6347                 if ($#commitlist >= 100) {
6348                         $next_link =
6349                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6350                                          -accesskey => "n", -title => "Alt-n"}, "next");
6351                         $paging_nav .= " &sdot; $next_link";
6352                 } else {
6353                         $paging_nav .= " &sdot; next";
6354                 }
6355
6356                 if ($#commitlist >= 100) {
6357                 }
6358
6359                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6360                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6361                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6362         }
6363
6364         if ($searchtype eq 'pickaxe') {
6365                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6366                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6367
6368                 print "<table class=\"pickaxe search\">\n";
6369                 my $alternate = 1;
6370                 local $/ = "\n";
6371                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6372                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6373                         ($search_use_regexp ? '--pickaxe-regex' : ());
6374                 undef %co;
6375                 my @files;
6376                 while (my $line = <$fd>) {
6377                         chomp $line;
6378                         next unless $line;
6379
6380                         my %set = parse_difftree_raw_line($line);
6381                         if (defined $set{'commit'}) {
6382                                 # finish previous commit
6383                                 if (%co) {
6384                                         print "</td>\n" .
6385                                               "<td class=\"link\">" .
6386                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6387                                               " | " .
6388                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6389                                         print "</td>\n" .
6390                                               "</tr>\n";
6391                                 }
6392
6393                                 if ($alternate) {
6394                                         print "<tr class=\"dark\">\n";
6395                                 } else {
6396                                         print "<tr class=\"light\">\n";
6397                                 }
6398                                 $alternate ^= 1;
6399                                 %co = parse_commit($set{'commit'});
6400                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6401                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6402                                       "<td><i>$author</i></td>\n" .
6403                                       "<td>" .
6404                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6405                                               -class => "list subject"},
6406                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6407                         } elsif (defined $set{'to_id'}) {
6408                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6409
6410                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6411                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6412                                               -class => "list"},
6413                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6414                                       "<br/>\n";
6415                         }
6416                 }
6417                 close $fd;
6418
6419                 # finish last commit (warning: repetition!)
6420                 if (%co) {
6421                         print "</td>\n" .
6422                               "<td class=\"link\">" .
6423                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6424                               " | " .
6425                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6426                         print "</td>\n" .
6427                               "</tr>\n";
6428                 }
6429
6430                 print "</table>\n";
6431         }
6432
6433         if ($searchtype eq 'grep') {
6434                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6435                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6436
6437                 print "<table class=\"grep_search\">\n";
6438                 my $alternate = 1;
6439                 my $matches = 0;
6440                 local $/ = "\n";
6441                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6442                         $search_use_regexp ? ('-E', '-i') : '-F',
6443                         $searchtext, $co{'tree'};
6444                 my $lastfile = '';
6445                 while (my $line = <$fd>) {
6446                         chomp $line;
6447                         my ($file, $lno, $ltext, $binary);
6448                         last if ($matches++ > 1000);
6449                         if ($line =~ /^Binary file (.+) matches$/) {
6450                                 $file = $1;
6451                                 $binary = 1;
6452                         } else {
6453                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6454                         }
6455                         if ($file ne $lastfile) {
6456                                 $lastfile and print "</td></tr>\n";
6457                                 if ($alternate++) {
6458                                         print "<tr class=\"dark\">\n";
6459                                 } else {
6460                                         print "<tr class=\"light\">\n";
6461                                 }
6462                                 print "<td class=\"list\">".
6463                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6464                                                                file_name=>"$file"),
6465                                                 -class => "list"}, esc_path($file));
6466                                 print "</td><td>\n";
6467                                 $lastfile = $file;
6468                         }
6469                         if ($binary) {
6470                                 print "<div class=\"binary\">Binary file</div>\n";
6471                         } else {
6472                                 $ltext = untabify($ltext);
6473                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6474                                         $ltext = esc_html($1, -nbsp=>1);
6475                                         $ltext .= '<span class="match">';
6476                                         $ltext .= esc_html($2, -nbsp=>1);
6477                                         $ltext .= '</span>';
6478                                         $ltext .= esc_html($3, -nbsp=>1);
6479                                 } else {
6480                                         $ltext = esc_html($ltext, -nbsp=>1);
6481                                 }
6482                                 print "<div class=\"pre\">" .
6483                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6484                                                                file_name=>"$file").'#l'.$lno,
6485                                                 -class => "linenr"}, sprintf('%4i', $lno))
6486                                         . ' ' .  $ltext . "</div>\n";
6487                         }
6488                 }
6489                 if ($lastfile) {
6490                         print "</td></tr>\n";
6491                         if ($matches > 1000) {
6492                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6493                         }
6494                 } else {
6495                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6496                 }
6497                 close $fd;
6498
6499                 print "</table>\n";
6500         }
6501         git_footer_html();
6502 }
6503
6504 sub git_search_help {
6505         git_header_html();
6506         git_print_page_nav('','', $hash,$hash,$hash);
6507         print <<EOT;
6508 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6509 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6510 the pattern entered is recognized as the POSIX extended
6511 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6512 insensitive).</p>
6513 <dl>
6514 <dt><b>commit</b></dt>
6515 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6516 EOT
6517         my $have_grep = gitweb_check_feature('grep');
6518         if ($have_grep) {
6519                 print <<EOT;
6520 <dt><b>grep</b></dt>
6521 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6522     a different one) are searched for the given pattern. On large trees, this search can take
6523 a while and put some strain on the server, so please use it with some consideration. Note that
6524 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6525 case-sensitive.</dd>
6526 EOT
6527         }
6528         print <<EOT;
6529 <dt><b>author</b></dt>
6530 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6531 <dt><b>committer</b></dt>
6532 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6533 EOT
6534         my $have_pickaxe = gitweb_check_feature('pickaxe');
6535         if ($have_pickaxe) {
6536                 print <<EOT;
6537 <dt><b>pickaxe</b></dt>
6538 <dd>All commits that caused the string to appear or disappear from any file (changes that
6539 added, removed or "modified" the string) will be listed. This search can take a while and
6540 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6541 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6542 EOT
6543         }
6544         print "</dl>\n";
6545         git_footer_html();
6546 }
6547
6548 sub git_shortlog {
6549         git_log_generic('shortlog', \&git_shortlog_body,
6550                         $hash, $hash_parent);
6551 }
6552
6553 ## ......................................................................
6554 ## feeds (RSS, Atom; OPML)
6555
6556 sub git_feed {
6557         my $format = shift || 'atom';
6558         my $have_blame = gitweb_check_feature('blame');
6559
6560         # Atom: http://www.atomenabled.org/developers/syndication/
6561         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6562         if ($format ne 'rss' && $format ne 'atom') {
6563                 die_error(400, "Unknown web feed format");
6564         }
6565
6566         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6567         my $head = $hash || 'HEAD';
6568         my @commitlist = parse_commits($head, 150, 0, $file_name);
6569
6570         my %latest_commit;
6571         my %latest_date;
6572         my $content_type = "application/$format+xml";
6573         if (defined $cgi->http('HTTP_ACCEPT') &&
6574                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6575                 # browser (feed reader) prefers text/xml
6576                 $content_type = 'text/xml';
6577         }
6578         if (defined($commitlist[0])) {
6579                 %latest_commit = %{$commitlist[0]};
6580                 my $latest_epoch = $latest_commit{'committer_epoch'};
6581                 %latest_date   = parse_date($latest_epoch);
6582                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6583                 if (defined $if_modified) {
6584                         my $since;
6585                         if (eval { require HTTP::Date; 1; }) {
6586                                 $since = HTTP::Date::str2time($if_modified);
6587                         } elsif (eval { require Time::ParseDate; 1; }) {
6588                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6589                         }
6590                         if (defined $since && $latest_epoch <= $since) {
6591                                 print $cgi->header(
6592                                         -type => $content_type,
6593                                         -charset => 'utf-8',
6594                                         -last_modified => $latest_date{'rfc2822'},
6595                                         -status => '304 Not Modified');
6596                                 return;
6597                         }
6598                 }
6599                 print $cgi->header(
6600                         -type => $content_type,
6601                         -charset => 'utf-8',
6602                         -last_modified => $latest_date{'rfc2822'});
6603         } else {
6604                 print $cgi->header(
6605                         -type => $content_type,
6606                         -charset => 'utf-8');
6607         }
6608
6609         # Optimization: skip generating the body if client asks only
6610         # for Last-Modified date.
6611         return if ($cgi->request_method() eq 'HEAD');
6612
6613         # header variables
6614         my $title = "$site_name - $project/$action";
6615         my $feed_type = 'log';
6616         if (defined $hash) {
6617                 $title .= " - '$hash'";
6618                 $feed_type = 'branch log';
6619                 if (defined $file_name) {
6620                         $title .= " :: $file_name";
6621                         $feed_type = 'history';
6622                 }
6623         } elsif (defined $file_name) {
6624                 $title .= " - $file_name";
6625                 $feed_type = 'history';
6626         }
6627         $title .= " $feed_type";
6628         my $descr = git_get_project_description($project);
6629         if (defined $descr) {
6630                 $descr = esc_html($descr);
6631         } else {
6632                 $descr = "$project " .
6633                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6634                          " feed";
6635         }
6636         my $owner = git_get_project_owner($project);
6637         $owner = esc_html($owner);
6638
6639         #header
6640         my $alt_url;
6641         if (defined $file_name) {
6642                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6643         } elsif (defined $hash) {
6644                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6645         } else {
6646                 $alt_url = href(-full=>1, action=>"summary");
6647         }
6648         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6649         if ($format eq 'rss') {
6650                 print <<XML;
6651 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6652 <channel>
6653 XML
6654                 print "<title>$title</title>\n" .
6655                       "<link>$alt_url</link>\n" .
6656                       "<description>$descr</description>\n" .
6657                       "<language>en</language>\n" .
6658                       # project owner is responsible for 'editorial' content
6659                       "<managingEditor>$owner</managingEditor>\n";
6660                 if (defined $logo || defined $favicon) {
6661                         # prefer the logo to the favicon, since RSS
6662                         # doesn't allow both
6663                         my $img = esc_url($logo || $favicon);
6664                         print "<image>\n" .
6665                               "<url>$img</url>\n" .
6666                               "<title>$title</title>\n" .
6667                               "<link>$alt_url</link>\n" .
6668                               "</image>\n";
6669                 }
6670                 if (%latest_date) {
6671                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6672                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6673                 }
6674                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6675         } elsif ($format eq 'atom') {
6676                 print <<XML;
6677 <feed xmlns="http://www.w3.org/2005/Atom">
6678 XML
6679                 print "<title>$title</title>\n" .
6680                       "<subtitle>$descr</subtitle>\n" .
6681                       '<link rel="alternate" type="text/html" href="' .
6682                       $alt_url . '" />' . "\n" .
6683                       '<link rel="self" type="' . $content_type . '" href="' .
6684                       $cgi->self_url() . '" />' . "\n" .
6685                       "<id>" . href(-full=>1) . "</id>\n" .
6686                       # use project owner for feed author
6687                       "<author><name>$owner</name></author>\n";
6688                 if (defined $favicon) {
6689                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6690                 }
6691                 if (defined $logo_url) {
6692                         # not twice as wide as tall: 72 x 27 pixels
6693                         print "<logo>" . esc_url($logo) . "</logo>\n";
6694                 }
6695                 if (! %latest_date) {
6696                         # dummy date to keep the feed valid until commits trickle in:
6697                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6698                 } else {
6699                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6700                 }
6701                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6702         }
6703
6704         # contents
6705         for (my $i = 0; $i <= $#commitlist; $i++) {
6706                 my %co = %{$commitlist[$i]};
6707                 my $commit = $co{'id'};
6708                 # we read 150, we always show 30 and the ones more recent than 48 hours
6709                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6710                         last;
6711                 }
6712                 my %cd = parse_date($co{'author_epoch'});
6713
6714                 # get list of changed files
6715                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6716                         $co{'parent'} || "--root",
6717                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6718                         or next;
6719                 my @difftree = map { chomp; $_ } <$fd>;
6720                 close $fd
6721                         or next;
6722
6723                 # print element (entry, item)
6724                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6725                 if ($format eq 'rss') {
6726                         print "<item>\n" .
6727                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6728                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6729                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6730                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6731                               "<link>$co_url</link>\n" .
6732                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6733                               "<content:encoded>" .
6734                               "<![CDATA[\n";
6735                 } elsif ($format eq 'atom') {
6736                         print "<entry>\n" .
6737                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6738                               "<updated>$cd{'iso-8601'}</updated>\n" .
6739                               "<author>\n" .
6740                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6741                         if ($co{'author_email'}) {
6742                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6743                         }
6744                         print "</author>\n" .
6745                               # use committer for contributor
6746                               "<contributor>\n" .
6747                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6748                         if ($co{'committer_email'}) {
6749                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6750                         }
6751                         print "</contributor>\n" .
6752                               "<published>$cd{'iso-8601'}</published>\n" .
6753                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6754                               "<id>$co_url</id>\n" .
6755                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6756                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6757                 }
6758                 my $comment = $co{'comment'};
6759                 print "<pre>\n";
6760                 foreach my $line (@$comment) {
6761                         $line = esc_html($line);
6762                         print "$line\n";
6763                 }
6764                 print "</pre><ul>\n";
6765                 foreach my $difftree_line (@difftree) {
6766                         my %difftree = parse_difftree_raw_line($difftree_line);
6767                         next if !$difftree{'from_id'};
6768
6769                         my $file = $difftree{'file'} || $difftree{'to_file'};
6770
6771                         print "<li>" .
6772                               "[" .
6773                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6774                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6775                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6776                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6777                                       -title => "diff"}, 'D');
6778                         if ($have_blame) {
6779                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6780                                                              file_name=>$file, hash_base=>$commit),
6781                                               -title => "blame"}, 'B');
6782                         }
6783                         # if this is not a feed of a file history
6784                         if (!defined $file_name || $file_name ne $file) {
6785                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6786                                                              file_name=>$file, hash=>$commit),
6787                                               -title => "history"}, 'H');
6788                         }
6789                         $file = esc_path($file);
6790                         print "] ".
6791                               "$file</li>\n";
6792                 }
6793                 if ($format eq 'rss') {
6794                         print "</ul>]]>\n" .
6795                               "</content:encoded>\n" .
6796                               "</item>\n";
6797                 } elsif ($format eq 'atom') {
6798                         print "</ul>\n</div>\n" .
6799                               "</content>\n" .
6800                               "</entry>\n";
6801                 }
6802         }
6803
6804         # end of feed
6805         if ($format eq 'rss') {
6806                 print "</channel>\n</rss>\n";
6807         } elsif ($format eq 'atom') {
6808                 print "</feed>\n";
6809         }
6810 }
6811
6812 sub git_rss {
6813         git_feed('rss');
6814 }
6815
6816 sub git_atom {
6817         git_feed('atom');
6818 }
6819
6820 sub git_opml {
6821         my @list = git_get_projects_list();
6822
6823         print $cgi->header(
6824                 -type => 'text/xml',
6825                 -charset => 'utf-8',
6826                 -content_disposition => 'inline; filename="opml.xml"');
6827
6828         print <<XML;
6829 <?xml version="1.0" encoding="utf-8"?>
6830 <opml version="1.0">
6831 <head>
6832   <title>$site_name OPML Export</title>
6833 </head>
6834 <body>
6835 <outline text="git RSS feeds">
6836 XML
6837
6838         foreach my $pr (@list) {
6839                 my %proj = %$pr;
6840                 my $head = git_get_head_hash($proj{'path'});
6841                 if (!defined $head) {
6842                         next;
6843                 }
6844                 $git_dir = "$projectroot/$proj{'path'}";
6845                 my %co = parse_commit($head);
6846                 if (!%co) {
6847                         next;
6848                 }
6849
6850                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6851                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6852                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6853                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6854         }
6855         print <<XML;
6856 </outline>
6857 </body>
6858 </opml>
6859 XML
6860 }