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

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