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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "++GIT_VERSION++";
  32
  33 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  34 sub evaluate_uri {
  35         our $cgi;
  36
  37         our $my_url = $cgi->url();
  38         our $my_uri = $cgi->url(-absolute => 1);
  39
  40         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  41         # needed and used only for URLs with nonempty PATH_INFO
  42         our $base_url = $my_url;
  43
  44         # When the script is used as DirectoryIndex, the URL does not contain the name
  45         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  46         # have to do it ourselves. We make $path_info global because it's also used
  47         # later on.
  48         #
  49         # Another issue with the script being the DirectoryIndex is that the resulting
  50         # $my_url data is not the full script URL: this is good, because we want
  51         # generated links to keep implying the script name if it wasn't explicitly
  52         # indicated in the URL we're handling, but it means that $my_url cannot be used
  53         # as base URL.
  54         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  55         # to build the base URL ourselves:
  56         our $path_info = $ENV{"PATH_INFO"};
  57         if ($path_info) {
  58                 if ($my_url =~ s,\Q$path_info\E$,, &&
  59                     $my_uri =~ s,\Q$path_info\E$,, &&
  60                     defined $ENV{'SCRIPT_NAME'}) {
  61                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  62                 }
  63         }
  64
  65         # target of the home link on top of all pages
  66         our $home_link = $my_uri || "/";
  67 }
  68
  69 # core git executable to use
  70 # this can just be "git" if your webserver has a sensible PATH
  71 our $GIT = "++GIT_BINDIR++/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "++GITWEB_PROJECTROOT++";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  83
  84 # name of your site or organization to appear in page titles
  85 # replace this with something more descriptive for clearer bookmarks
  86 our $site_name = "++GITWEB_SITENAME++"
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "++GITWEB_SITE_HEADER++";
  91 # html text to include at home page
  92 our $home_text = "++GITWEB_HOMETEXT++";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "++GITWEB_SITE_FOOTER++";
  95
  96 # URI of stylesheets
  97 our @stylesheets = ("++GITWEB_CSS++");
  98 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  99 our $stylesheet = undef;
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "++GITWEB_JS++";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "++GITWEB_LIST++";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # information about snapshot formats that gitweb is capable of serving
 169 our %known_snapshot_formats = (
 170         # name => {
 171         #       'display' => display name,
 172         #       'type' => mime type,
 173         #       'suffix' => filename suffix,
 174         #       'format' => --format for git-archive,
 175         #       'compressor' => [compressor command and arguments]
 176         #                       (array reference, optional)
 177         #       'disabled' => boolean (optional)}
 178         #
 179         'tgz' => {
 180                 'display' => 'tar.gz',
 181                 'type' => 'application/x-gzip',
 182                 'suffix' => '.tar.gz',
 183                 'format' => 'tar',
 184                 'compressor' => ['gzip']},
 185
 186         'tbz2' => {
 187                 'display' => 'tar.bz2',
 188                 'type' => 'application/x-bzip2',
 189                 'suffix' => '.tar.bz2',
 190                 'format' => 'tar',
 191                 'compressor' => ['bzip2']},
 192
 193         'txz' => {
 194                 'display' => 'tar.xz',
 195                 'type' => 'application/x-xz',
 196                 'suffix' => '.tar.xz',
 197                 'format' => 'tar',
 198                 'compressor' => ['xz'],
 199                 'disabled' => 1},
 200
 201         'zip' => {
 202                 'display' => 'zip',
 203                 'type' => 'application/x-zip',
 204                 'suffix' => '.zip',
 205                 'format' => 'zip'},
 206 );
 207
 208 # Aliases so we understand old gitweb.snapshot values in repository
 209 # configuration.
 210 our %known_snapshot_format_aliases = (
 211         'gzip'  => 'tgz',
 212         'bzip2' => 'tbz2',
 213         'xz'    => 'txz',
 214
 215         # backward compatibility: legacy gitweb config support
 216         'x-gzip' => undef, 'gz' => undef,
 217         'x-bzip2' => undef, 'bz2' => undef,
 218         'x-zip' => undef, '' => undef,
 219 );
 220
 221 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 222 # are changed, it may be appropriate to change these values too via
 223 # $GITWEB_CONFIG.
 224 our %avatar_size = (
 225         'default' => 16,
 226         'double'  => 32
 227 );
 228
 229 # Used to set the maximum load that we will still respond to gitweb queries.
 230 # If server load exceed this value then return "503 server busy" error.
 231 # If gitweb cannot determined server load, it is taken to be 0.
 232 # Leave it undefined (or set to 'undef') to turn off load checking.
 233 our $maxload = 300;
 234
 235 # You define site-wide feature defaults here; override them with
 236 # $GITWEB_CONFIG as necessary.
 237 our %feature = (
 238         # feature => {
 239         #       'sub' => feature-sub (subroutine),
 240         #       'override' => allow-override (boolean),
 241         #       'default' => [ default options...] (array reference)}
 242         #
 243         # if feature is overridable (it means that allow-override has true value),
 244         # then feature-sub will be called with default options as parameters;
 245         # return value of feature-sub indicates if to enable specified feature
 246         #
 247         # if there is no 'sub' key (no feature-sub), then feature cannot be
 248         # overriden
 249         #
 250         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 251         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 252         # is enabled
 253
 254         # Enable the 'blame' blob view, showing the last commit that modified
 255         # each line in the file. This can be very CPU-intensive.
 256
 257         # To enable system wide have in $GITWEB_CONFIG
 258         # $feature{'blame'}{'default'} = [1];
 259         # To have project specific config enable override in $GITWEB_CONFIG
 260         # $feature{'blame'}{'override'} = 1;
 261         # and in project config gitweb.blame = 0|1;
 262         'blame' => {
 263                 'sub' => sub { feature_bool('blame', @_) },
 264                 'override' => 0,
 265                 'default' => [0]},
 266
 267         # Enable the 'snapshot' link, providing a compressed archive of any
 268         # tree. This can potentially generate high traffic if you have large
 269         # project.
 270
 271         # Value is a list of formats defined in %known_snapshot_formats that
 272         # you wish to offer.
 273         # To disable system wide have in $GITWEB_CONFIG
 274         # $feature{'snapshot'}{'default'} = [];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'snapshot'}{'override'} = 1;
 277         # and in project config, a comma-separated list of formats or "none"
 278         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 279         'snapshot' => {
 280                 'sub' => \&feature_snapshot,
 281                 'override' => 0,
 282                 'default' => ['tgz']},
 283
 284         # Enable text search, which will list the commits which match author,
 285         # committer or commit text to a given string.  Enabled by default.
 286         # Project specific override is not supported.
 287         'search' => {
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable grep search, which will list the files in currently selected
 292         # tree containing the given string. Enabled by default. This can be
 293         # potentially CPU-intensive, of course.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'grep'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'grep'}{'override'} = 1;
 299         # and in project config gitweb.grep = 0|1;
 300         'grep' => {
 301                 'sub' => sub { feature_bool('grep', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable the pickaxe search, which will list the commits that modified
 306         # a given string in a file. This can be practical and quite faster
 307         # alternative to 'blame', but still potentially CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'pickaxe'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'pickaxe'}{'override'} = 1;
 313         # and in project config gitweb.pickaxe = 0|1;
 314         'pickaxe' => {
 315                 'sub' => sub { feature_bool('pickaxe', @_) },
 316                 'override' => 0,
 317                 'default' => [1]},
 318
 319         # Enable showing size of blobs in a 'tree' view, in a separate
 320         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 321
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'show-sizes'}{'default'} = [0];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'show-sizes'}{'override'} = 1;
 326         # and in project config gitweb.showsizes = 0|1;
 327         'show-sizes' => {
 328                 'sub' => sub { feature_bool('showsizes', @_) },
 329                 'override' => 0,
 330                 'default' => [1]},
 331
 332         # Make gitweb use an alternative format of the URLs which can be
 333         # more readable and natural-looking: project name is embedded
 334         # directly in the path and the query string contains other
 335         # auxiliary information. All gitweb installations recognize
 336         # URL in either format; this configures in which formats gitweb
 337         # generates links.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pathinfo'}{'default'} = [1];
 341         # Project specific override is not supported.
 342
 343         # Note that you will need to change the default location of CSS,
 344         # favicon, logo and possibly other files to an absolute URL. Also,
 345         # if gitweb.cgi serves as your indexfile, you will need to force
 346         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 347         'pathinfo' => {
 348                 'override' => 0,
 349                 'default' => [0]},
 350
 351         # Make gitweb consider projects in project root subdirectories
 352         # to be forks of existing projects. Given project $projname.git,
 353         # projects matching $projname/*.git will not be shown in the main
 354         # projects list, instead a '+' mark will be added to $projname
 355         # there and a 'forks' view will be enabled for the project, listing
 356         # all the forks. If project list is taken from a file, forks have
 357         # to be listed after the main project.
 358
 359         # To enable system wide have in $GITWEB_CONFIG
 360         # $feature{'forks'}{'default'} = [1];
 361         # Project specific override is not supported.
 362         'forks' => {
 363                 'override' => 0,
 364                 'default' => [0]},
 365
 366         # Insert custom links to the action bar of all project pages.
 367         # This enables you mainly to link to third-party scripts integrating
 368         # into gitweb; e.g. git-browser for graphical history representation
 369         # or custom web-based repository administration interface.
 370
 371         # The 'default' value consists of a list of triplets in the form
 372         # (label, link, position) where position is the label after which
 373         # to insert the link and link is a format string where %n expands
 374         # to the project name, %f to the project path within the filesystem,
 375         # %h to the current hash (h gitweb parameter) and %b to the current
 376         # hash base (hb gitweb parameter); %% expands to %.
 377
 378         # To enable system wide have in $GITWEB_CONFIG e.g.
 379         # $feature{'actions'}{'default'} = [('graphiclog',
 380         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 381         # Project specific override is not supported.
 382         'actions' => {
 383                 'override' => 0,
 384                 'default' => []},
 385
 386         # Allow gitweb scan project content tags described in ctags/
 387         # of project repository, and display the popular Web 2.0-ish
 388         # "tag cloud" near the project list. Note that this is something
 389         # COMPLETELY different from the normal Git tags.
 390
 391         # gitweb by itself can show existing tags, but it does not handle
 392         # tagging itself; you need an external application for that.
 393         # For an example script, check Girocco's cgi/tagproj.cgi.
 394         # You may want to install the HTML::TagCloud Perl module to get
 395         # a pretty tag cloud instead of just a list of tags.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 399         # Project specific override is not supported.
 400         'ctags' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # The maximum number of patches in a patchset generated in patch
 405         # view. Set this to 0 or undef to disable patch view, or to a
 406         # negative number to remove any limit.
 407
 408         # To disable system wide have in $GITWEB_CONFIG
 409         # $feature{'patches'}{'default'} = [0];
 410         # To have project specific config enable override in $GITWEB_CONFIG
 411         # $feature{'patches'}{'override'} = 1;
 412         # and in project config gitweb.patches = 0|n;
 413         # where n is the maximum number of patches allowed in a patchset.
 414         'patches' => {
 415                 'sub' => \&feature_patches,
 416                 'override' => 0,
 417                 'default' => [16]},
 418
 419         # Avatar support. When this feature is enabled, views such as
 420         # shortlog or commit will display an avatar associated with
 421         # the email of the committer(s) and/or author(s).
 422
 423         # Currently available providers are gravatar and picon.
 424         # If an unknown provider is specified, the feature is disabled.
 425
 426         # Gravatar depends on Digest::MD5.
 427         # Picon currently relies on the indiana.edu database.
 428
 429         # To enable system wide have in $GITWEB_CONFIG
 430         # $feature{'avatar'}{'default'} = ['<provider>'];
 431         # where <provider> is either gravatar or picon.
 432         # To have project specific config enable override in $GITWEB_CONFIG
 433         # $feature{'avatar'}{'override'} = 1;
 434         # and in project config gitweb.avatar = <provider>;
 435         'avatar' => {
 436                 'sub' => \&feature_avatar,
 437                 'override' => 0,
 438                 'default' => ['']},
 439
 440         # Enable displaying how much time and how many git commands
 441         # it took to generate and display page.  Disabled by default.
 442         # Project specific override is not supported.
 443         'timed' => {
 444                 'override' => 0,
 445                 'default' => [0]},
 446
 447         # Enable turning some links into links to actions which require
 448         # JavaScript to run (like 'blame_incremental').  Not enabled by
 449         # default.  Project specific override is currently not supported.
 450         'javascript-actions' => {
 451                 'override' => 0,
 452                 'default' => [0]},
 453 );
 454
 455 sub gitweb_get_feature {
 456         my ($name) = @_;
 457         return unless exists $feature{$name};
 458         my ($sub, $override, @defaults) = (
 459                 $feature{$name}{'sub'},
 460                 $feature{$name}{'override'},
 461                 @{$feature{$name}{'default'}});
 462         # project specific override is possible only if we have project
 463         our $git_dir; # global variable, declared later
 464         if (!$override || !defined $git_dir) {
 465                 return @defaults;
 466         }
 467         if (!defined $sub) {
 468                 warn "feature $name is not overridable";
 469                 return @defaults;
 470         }
 471         return $sub->(@defaults);
 472 }
 473
 474 # A wrapper to check if a given feature is enabled.
 475 # With this, you can say
 476 #
 477 #   my $bool_feat = gitweb_check_feature('bool_feat');
 478 #   gitweb_check_feature('bool_feat') or somecode;
 479 #
 480 # instead of
 481 #
 482 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 483 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 484 #
 485 sub gitweb_check_feature {
 486         return (gitweb_get_feature(@_))[0];
 487 }
 488
 489
 490 sub feature_bool {
 491         my $key = shift;
 492         my ($val) = git_get_project_config($key, '--bool');
 493
 494         if (!defined $val) {
 495                 return ($_[0]);
 496         } elsif ($val eq 'true') {
 497                 return (1);
 498         } elsif ($val eq 'false') {
 499                 return (0);
 500         }
 501 }
 502
 503 sub feature_snapshot {
 504         my (@fmts) = @_;
 505
 506         my ($val) = git_get_project_config('snapshot');
 507
 508         if ($val) {
 509                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 510         }
 511
 512         return @fmts;
 513 }
 514
 515 sub feature_patches {
 516         my @val = (git_get_project_config('patches', '--int'));
 517
 518         if (@val) {
 519                 return @val;
 520         }
 521
 522         return ($_[0]);
 523 }
 524
 525 sub feature_avatar {
 526         my @val = (git_get_project_config('avatar'));
 527
 528         return @val ? @val : @_;
 529 }
 530
 531 # checking HEAD file with -e is fragile if the repository was
 532 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 533 # and then pruned.
 534 sub check_head_link {
 535         my ($dir) = @_;
 536         my $headfile = "$dir/HEAD";
 537         return ((-e $headfile) ||
 538                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 539 }
 540
 541 sub check_export_ok {
 542         my ($dir) = @_;
 543         return (check_head_link($dir) &&
 544                 (!$export_ok || -e "$dir/$export_ok") &&
 545                 (!$export_auth_hook || $export_auth_hook->($dir)));
 546 }
 547
 548 # process alternate names for backward compatibility
 549 # filter out unsupported (unknown) snapshot formats
 550 sub filter_snapshot_fmts {
 551         my @fmts = @_;
 552
 553         @fmts = map {
 554                 exists $known_snapshot_format_aliases{$_} ?
 555                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 556         @fmts = grep {
 557                 exists $known_snapshot_formats{$_} &&
 558                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 559 }
 560
 561 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 562 sub evaluate_gitweb_config {
 563         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 564         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 565         # die if there are errors parsing config file
 566         if (-e $GITWEB_CONFIG) {
 567                 do $GITWEB_CONFIG;
 568                 die $@ if $@;
 569         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 570                 do $GITWEB_CONFIG_SYSTEM;
 571                 die $@ if $@;
 572         }
 573 }
 574
 575 # Get loadavg of system, to compare against $maxload.
 576 # Currently it requires '/proc/loadavg' present to get loadavg;
 577 # if it is not present it returns 0, which means no load checking.
 578 sub get_loadavg {
 579         if( -e '/proc/loadavg' ){
 580                 open my $fd, '<', '/proc/loadavg'
 581                         or return 0;
 582                 my @load = split(/\s+/, scalar <$fd>);
 583                 close $fd;
 584
 585                 # The first three columns measure CPU and IO utilization of the last one,
 586                 # five, and 10 minute periods.  The fourth column shows the number of
 587                 # currently running processes and the total number of processes in the m/n
 588                 # format.  The last column displays the last process ID used.
 589                 return $load[0] || 0;
 590         }
 591         # additional checks for load average should go here for things that don't export
 592         # /proc/loadavg
 593
 594         return 0;
 595 }
 596
 597 # version of the core git binary
 598 our $git_version;
 599 sub evaluate_git_version {
 600         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 601         $number_of_git_cmds++;
 602 }
 603
 604 sub check_loadavg {
 605         if (defined $maxload && get_loadavg() > $maxload) {
 606                 die_error(503, "The load average on the server is too high");
 607         }
 608 }
 609
 610 # ======================================================================
 611 # input validation and dispatch
 612
 613 # input parameters can be collected from a variety of sources (presently, CGI
 614 # and PATH_INFO), so we define an %input_params hash that collects them all
 615 # together during validation: this allows subsequent uses (e.g. href()) to be
 616 # agnostic of the parameter origin
 617
 618 our %input_params = ();
 619
 620 # input parameters are stored with the long parameter name as key. This will
 621 # also be used in the href subroutine to convert parameters to their CGI
 622 # equivalent, and since the href() usage is the most frequent one, we store
 623 # the name -> CGI key mapping here, instead of the reverse.
 624 #
 625 # XXX: Warning: If you touch this, check the search form for updating,
 626 # too.
 627
 628 our @cgi_param_mapping = (
 629         project => "p",
 630         action => "a",
 631         file_name => "f",
 632         file_parent => "fp",
 633         hash => "h",
 634         hash_parent => "hp",
 635         hash_base => "hb",
 636         hash_parent_base => "hpb",
 637         page => "pg",
 638         order => "o",
 639         searchtext => "s",
 640         searchtype => "st",
 641         snapshot_format => "sf",
 642         extra_options => "opt",
 643         search_use_regexp => "sr",
 644         # this must be last entry (for manipulation from JavaScript)
 645         javascript => "js"
 646 );
 647 our %cgi_param_mapping = @cgi_param_mapping;
 648
 649 # we will also need to know the possible actions, for validation
 650 our %actions = (
 651         "blame" => \&git_blame,
 652         "blame_incremental" => \&git_blame_incremental,
 653         "blame_data" => \&git_blame_data,
 654         "blobdiff" => \&git_blobdiff,
 655         "blobdiff_plain" => \&git_blobdiff_plain,
 656         "blob" => \&git_blob,
 657         "blob_plain" => \&git_blob_plain,
 658         "commitdiff" => \&git_commitdiff,
 659         "commitdiff_plain" => \&git_commitdiff_plain,
 660         "commit" => \&git_commit,
 661         "forks" => \&git_forks,
 662         "heads" => \&git_heads,
 663         "history" => \&git_history,
 664         "log" => \&git_log,
 665         "patch" => \&git_patch,
 666         "patches" => \&git_patches,
 667         "rss" => \&git_rss,
 668         "atom" => \&git_atom,
 669         "search" => \&git_search,
 670         "search_help" => \&git_search_help,
 671         "shortlog" => \&git_shortlog,
 672         "summary" => \&git_summary,
 673         "tag" => \&git_tag,
 674         "tags" => \&git_tags,
 675         "tree" => \&git_tree,
 676         "snapshot" => \&git_snapshot,
 677         "object" => \&git_object,
 678         # those below don't need $project
 679         "opml" => \&git_opml,
 680         "project_list" => \&git_project_list,
 681         "project_index" => \&git_project_index,
 682 );
 683
 684 # finally, we have the hash of allowed extra_options for the commands that
 685 # allow them
 686 our %allowed_options = (
 687         "--no-merges" => [ qw(rss atom log shortlog history) ],
 688 );
 689
 690 # fill %input_params with the CGI parameters. All values except for 'opt'
 691 # should be single values, but opt can be an array. We should probably
 692 # build an array of parameters that can be multi-valued, but since for the time
 693 # being it's only this one, we just single it out
 694 sub evaluate_query_params {
 695         our $cgi;
 696
 697         while (my ($name, $symbol) = each %cgi_param_mapping) {
 698                 if ($symbol eq 'opt') {
 699                         $input_params{$name} = [ $cgi->param($symbol) ];
 700                 } else {
 701                         $input_params{$name} = $cgi->param($symbol);
 702                 }
 703         }
 704 }
 705
 706 # now read PATH_INFO and update the parameter list for missing parameters
 707 sub evaluate_path_info {
 708         return if defined $input_params{'project'};
 709         return if !$path_info;
 710         $path_info =~ s,^/+,,;
 711         return if !$path_info;
 712
 713         # find which part of PATH_INFO is project
 714         my $project = $path_info;
 715         $project =~ s,/+$,,;
 716         while ($project && !check_head_link("$projectroot/$project")) {
 717                 $project =~ s,/*[^/]*$,,;
 718         }
 719         return unless $project;
 720         $input_params{'project'} = $project;
 721
 722         # do not change any parameters if an action is given using the query string
 723         return if $input_params{'action'};
 724         $path_info =~ s,^\Q$project\E/*,,;
 725
 726         # next, check if we have an action
 727         my $action = $path_info;
 728         $action =~ s,/.*$,,;
 729         if (exists $actions{$action}) {
 730                 $path_info =~ s,^$action/*,,;
 731                 $input_params{'action'} = $action;
 732         }
 733
 734         # list of actions that want hash_base instead of hash, but can have no
 735         # pathname (f) parameter
 736         my @wants_base = (
 737                 'tree',
 738                 'history',
 739         );
 740
 741         # we want to catch
 742         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 743         my ($parentrefname, $parentpathname, $refname, $pathname) =
 744                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 745
 746         # first, analyze the 'current' part
 747         if (defined $pathname) {
 748                 # we got "branch:filename" or "branch:dir/"
 749                 # we could use git_get_type(branch:pathname), but:
 750                 # - it needs $git_dir
 751                 # - it does a git() call
 752                 # - the convention of terminating directories with a slash
 753                 #   makes it superfluous
 754                 # - embedding the action in the PATH_INFO would make it even
 755                 #   more superfluous
 756                 $pathname =~ s,^/+,,;
 757                 if (!$pathname || substr($pathname, -1) eq "/") {
 758                         $input_params{'action'} ||= "tree";
 759                         $pathname =~ s,/$,,;
 760                 } else {
 761                         # the default action depends on whether we had parent info
 762                         # or not
 763                         if ($parentrefname) {
 764                                 $input_params{'action'} ||= "blobdiff_plain";
 765                         } else {
 766                                 $input_params{'action'} ||= "blob_plain";
 767                         }
 768                 }
 769                 $input_params{'hash_base'} ||= $refname;
 770                 $input_params{'file_name'} ||= $pathname;
 771         } elsif (defined $refname) {
 772                 # we got "branch". In this case we have to choose if we have to
 773                 # set hash or hash_base.
 774                 #
 775                 # Most of the actions without a pathname only want hash to be
 776                 # set, except for the ones specified in @wants_base that want
 777                 # hash_base instead. It should also be noted that hand-crafted
 778                 # links having 'history' as an action and no pathname or hash
 779                 # set will fail, but that happens regardless of PATH_INFO.
 780                 $input_params{'action'} ||= "shortlog";
 781                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 782                         $input_params{'hash_base'} ||= $refname;
 783                 } else {
 784                         $input_params{'hash'} ||= $refname;
 785                 }
 786         }
 787
 788         # next, handle the 'parent' part, if present
 789         if (defined $parentrefname) {
 790                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 791                 # someproject/blobdiff/oldrev..newrev:/filename
 792                 if ($parentpathname) {
 793                         $parentpathname =~ s,^/+,,;
 794                         $parentpathname =~ s,/$,,;
 795                         $input_params{'file_parent'} ||= $parentpathname;
 796                 } else {
 797                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 798                 }
 799                 # we assume that hash_parent_base is wanted if a path was specified,
 800                 # or if the action wants hash_base instead of hash
 801                 if (defined $input_params{'file_parent'} ||
 802                         grep { $_ eq $input_params{'action'} } @wants_base) {
 803                         $input_params{'hash_parent_base'} ||= $parentrefname;
 804                 } else {
 805                         $input_params{'hash_parent'} ||= $parentrefname;
 806                 }
 807         }
 808
 809         # for the snapshot action, we allow URLs in the form
 810         # $project/snapshot/$hash.ext
 811         # where .ext determines the snapshot and gets removed from the
 812         # passed $refname to provide the $hash.
 813         #
 814         # To be able to tell that $refname includes the format extension, we
 815         # require the following two conditions to be satisfied:
 816         # - the hash input parameter MUST have been set from the $refname part
 817         #   of the URL (i.e. they must be equal)
 818         # - the snapshot format MUST NOT have been defined already (e.g. from
 819         #   CGI parameter sf)
 820         # It's also useless to try any matching unless $refname has a dot,
 821         # so we check for that too
 822         if (defined $input_params{'action'} &&
 823                 $input_params{'action'} eq 'snapshot' &&
 824                 defined $refname && index($refname, '.') != -1 &&
 825                 $refname eq $input_params{'hash'} &&
 826                 !defined $input_params{'snapshot_format'}) {
 827                 # We loop over the known snapshot formats, checking for
 828                 # extensions. Allowed extensions are both the defined suffix
 829                 # (which includes the initial dot already) and the snapshot
 830                 # format key itself, with a prepended dot
 831                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 832                         my $hash = $refname;
 833                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 834                                 next;
 835                         }
 836                         my $sfx = $1;
 837                         # a valid suffix was found, so set the snapshot format
 838                         # and reset the hash parameter
 839                         $input_params{'snapshot_format'} = $fmt;
 840                         $input_params{'hash'} = $hash;
 841                         # we also set the format suffix to the one requested
 842                         # in the URL: this way a request for e.g. .tgz returns
 843                         # a .tgz instead of a .tar.gz
 844                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 845                         last;
 846                 }
 847         }
 848 }
 849
 850 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 851      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 852      $searchtext, $search_regexp);
 853 sub evaluate_and_validate_params {
 854         our $action = $input_params{'action'};
 855         if (defined $action) {
 856                 if (!validate_action($action)) {
 857                         die_error(400, "Invalid action parameter");
 858                 }
 859         }
 860
 861         # parameters which are pathnames
 862         our $project = $input_params{'project'};
 863         if (defined $project) {
 864                 if (!validate_project($project)) {
 865                         undef $project;
 866                         die_error(404, "No such project");
 867                 }
 868         }
 869
 870         our $file_name = $input_params{'file_name'};
 871         if (defined $file_name) {
 872                 if (!validate_pathname($file_name)) {
 873                         die_error(400, "Invalid file parameter");
 874                 }
 875         }
 876
 877         our $file_parent = $input_params{'file_parent'};
 878         if (defined $file_parent) {
 879                 if (!validate_pathname($file_parent)) {
 880                         die_error(400, "Invalid file parent parameter");
 881                 }
 882         }
 883
 884         # parameters which are refnames
 885         our $hash = $input_params{'hash'};
 886         if (defined $hash) {
 887                 if (!validate_refname($hash)) {
 888                         die_error(400, "Invalid hash parameter");
 889                 }
 890         }
 891
 892         our $hash_parent = $input_params{'hash_parent'};
 893         if (defined $hash_parent) {
 894                 if (!validate_refname($hash_parent)) {
 895                         die_error(400, "Invalid hash parent parameter");
 896                 }
 897         }
 898
 899         our $hash_base = $input_params{'hash_base'};
 900         if (defined $hash_base) {
 901                 if (!validate_refname($hash_base)) {
 902                         die_error(400, "Invalid hash base parameter");
 903                 }
 904         }
 905
 906         our @extra_options = @{$input_params{'extra_options'}};
 907         # @extra_options is always defined, since it can only be (currently) set from
 908         # CGI, and $cgi->param() returns the empty array in array context if the param
 909         # is not set
 910         foreach my $opt (@extra_options) {
 911                 if (not exists $allowed_options{$opt}) {
 912                         die_error(400, "Invalid option parameter");
 913                 }
 914                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 915                         die_error(400, "Invalid option parameter for this action");
 916                 }
 917         }
 918
 919         our $hash_parent_base = $input_params{'hash_parent_base'};
 920         if (defined $hash_parent_base) {
 921                 if (!validate_refname($hash_parent_base)) {
 922                         die_error(400, "Invalid hash parent base parameter");
 923                 }
 924         }
 925
 926         # other parameters
 927         our $page = $input_params{'page'};
 928         if (defined $page) {
 929                 if ($page =~ m/[^0-9]/) {
 930                         die_error(400, "Invalid page parameter");
 931                 }
 932         }
 933
 934         our $searchtype = $input_params{'searchtype'};
 935         if (defined $searchtype) {
 936                 if ($searchtype =~ m/[^a-z]/) {
 937                         die_error(400, "Invalid searchtype parameter");
 938                 }
 939         }
 940
 941         our $search_use_regexp = $input_params{'search_use_regexp'};
 942
 943         our $searchtext = $input_params{'searchtext'};
 944         our $search_regexp;
 945         if (defined $searchtext) {
 946                 if (length($searchtext) < 2) {
 947                         die_error(403, "At least two characters are required for search parameter");
 948                 }
 949                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 950         }
 951 }
 952
 953 # path to the current git repository
 954 our $git_dir;
 955 sub evaluate_git_dir {
 956         our $git_dir = "$projectroot/$project" if $project;
 957 }
 958
 959 our (@snapshot_fmts, $git_avatar);
 960 sub configure_gitweb_features {
 961         # list of supported snapshot formats
 962         our @snapshot_fmts = gitweb_get_feature('snapshot');
 963         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 964
 965         # check that the avatar feature is set to a known provider name,
 966         # and for each provider check if the dependencies are satisfied.
 967         # if the provider name is invalid or the dependencies are not met,
 968         # reset $git_avatar to the empty string.
 969         our ($git_avatar) = gitweb_get_feature('avatar');
 970         if ($git_avatar eq 'gravatar') {
 971                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 972         } elsif ($git_avatar eq 'picon') {
 973                 # no dependencies
 974         } else {
 975                 $git_avatar = '';
 976         }
 977 }
 978
 979 # dispatch
 980 sub dispatch {
 981         if (!defined $action) {
 982                 if (defined $hash) {
 983                         $action = git_get_type($hash);
 984                 } elsif (defined $hash_base && defined $file_name) {
 985                         $action = git_get_type("$hash_base:$file_name");
 986                 } elsif (defined $project) {
 987                         $action = 'summary';
 988                 } else {
 989                         $action = 'project_list';
 990                 }
 991         }
 992         if (!defined($actions{$action})) {
 993                 die_error(400, "Unknown action");
 994         }
 995         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 996             !$project) {
 997                 die_error(400, "Project needed");
 998         }
 999         $actions{$action}->();
1000 }
1001
1002 sub run_request {
1003         our $t0 = [Time::HiRes::gettimeofday()]
1004                 if defined $t0;
1005
1006         evaluate_uri();
1007         evaluate_gitweb_config();
1008         evaluate_git_version();
1009         check_loadavg();
1010
1011         # $projectroot and $projects_list might be set in gitweb config file
1012         $projects_list ||= $projectroot;
1013
1014         evaluate_query_params();
1015         evaluate_path_info();
1016         evaluate_and_validate_params();
1017         evaluate_git_dir();
1018
1019         configure_gitweb_features();
1020
1021         dispatch();
1022 }
1023
1024 our $is_last_request = sub { 1 };
1025 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1026 our $CGI = 'CGI';
1027 our $cgi;
1028 sub configure_as_fcgi {
1029         require CGI::Fast;
1030         our $CGI = 'CGI::Fast';
1031
1032         my $request_number = 0;
1033         # let each child service 100 requests
1034         our $is_last_request = sub { ++$request_number > 100 };
1035 }
1036 sub evaluate_argv {
1037         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1038         configure_as_fcgi()
1039                 if $script_name =~ /\.fcgi$/;
1040
1041         return unless (@ARGV);
1042
1043         require Getopt::Long;
1044         Getopt::Long::GetOptions(
1045                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1046                 'nproc|n=i' => sub {
1047                         my ($arg, $val) = @_;
1048                         return unless eval { require FCGI::ProcManager; 1; };
1049                         my $proc_manager = FCGI::ProcManager->new({
1050                                 n_processes => $val,
1051                         });
1052                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1053                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1054                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1055                 },
1056         );
1057 }
1058
1059 sub run {
1060         evaluate_argv();
1061
1062         $pre_listen_hook->()
1063                 if $pre_listen_hook;
1064
1065  REQUEST:
1066         while ($cgi = $CGI->new()) {
1067                 $pre_dispatch_hook->()
1068                         if $pre_dispatch_hook;
1069
1070                 run_request();
1071
1072                 $pre_dispatch_hook->()
1073                         if $post_dispatch_hook;
1074
1075                 last REQUEST if ($is_last_request->());
1076         }
1077
1078  DONE_GITWEB:
1079         1;
1080 }
1081
1082 run();
1083
1084 ## ======================================================================
1085 ## action links
1086
1087 # possible values of extra options
1088 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1089 # -replay => 1      - start from a current view (replay with modifications)
1090 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1091 sub href {
1092         my %params = @_;
1093         # default is to use -absolute url() i.e. $my_uri
1094         my $href = $params{-full} ? $my_url : $my_uri;
1095
1096         $params{'project'} = $project unless exists $params{'project'};
1097
1098         if ($params{-replay}) {
1099                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1100                         if (!exists $params{$name}) {
1101                                 $params{$name} = $input_params{$name};
1102                         }
1103                 }
1104         }
1105
1106         my $use_pathinfo = gitweb_check_feature('pathinfo');
1107         if (defined $params{'project'} &&
1108             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1109                 # try to put as many parameters as possible in PATH_INFO:
1110                 #   - project name
1111                 #   - action
1112                 #   - hash_parent or hash_parent_base:/file_parent
1113                 #   - hash or hash_base:/filename
1114                 #   - the snapshot_format as an appropriate suffix
1115
1116                 # When the script is the root DirectoryIndex for the domain,
1117                 # $href here would be something like http://gitweb.example.com/
1118                 # Thus, we strip any trailing / from $href, to spare us double
1119                 # slashes in the final URL
1120                 $href =~ s,/$,,;
1121
1122                 # Then add the project name, if present
1123                 $href .= "/".esc_url($params{'project'});
1124                 delete $params{'project'};
1125
1126                 # since we destructively absorb parameters, we keep this
1127                 # boolean that remembers if we're handling a snapshot
1128                 my $is_snapshot = $params{'action'} eq 'snapshot';
1129
1130                 # Summary just uses the project path URL, any other action is
1131                 # added to the URL
1132                 if (defined $params{'action'}) {
1133                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1134                         delete $params{'action'};
1135                 }
1136
1137                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1138                 # stripping nonexistent or useless pieces
1139                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1140                         || $params{'hash_parent'} || $params{'hash'});
1141                 if (defined $params{'hash_base'}) {
1142                         if (defined $params{'hash_parent_base'}) {
1143                                 $href .= esc_url($params{'hash_parent_base'});
1144                                 # skip the file_parent if it's the same as the file_name
1145                                 if (defined $params{'file_parent'}) {
1146                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1147                                                 delete $params{'file_parent'};
1148                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1149                                                 $href .= ":/".esc_url($params{'file_parent'});
1150                                                 delete $params{'file_parent'};
1151                                         }
1152                                 }
1153                                 $href .= "..";
1154                                 delete $params{'hash_parent'};
1155                                 delete $params{'hash_parent_base'};
1156                         } elsif (defined $params{'hash_parent'}) {
1157                                 $href .= esc_url($params{'hash_parent'}). "..";
1158                                 delete $params{'hash_parent'};
1159                         }
1160
1161                         $href .= esc_url($params{'hash_base'});
1162                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1163                                 $href .= ":/".esc_url($params{'file_name'});
1164                                 delete $params{'file_name'};
1165                         }
1166                         delete $params{'hash'};
1167                         delete $params{'hash_base'};
1168                 } elsif (defined $params{'hash'}) {
1169                         $href .= esc_url($params{'hash'});
1170                         delete $params{'hash'};
1171                 }
1172
1173                 # If the action was a snapshot, we can absorb the
1174                 # snapshot_format parameter too
1175                 if ($is_snapshot) {
1176                         my $fmt = $params{'snapshot_format'};
1177                         # snapshot_format should always be defined when href()
1178                         # is called, but just in case some code forgets, we
1179                         # fall back to the default
1180                         $fmt ||= $snapshot_fmts[0];
1181                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1182                         delete $params{'snapshot_format'};
1183                 }
1184         }
1185
1186         # now encode the parameters explicitly
1187         my @result = ();
1188         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1189                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1190                 if (defined $params{$name}) {
1191                         if (ref($params{$name}) eq "ARRAY") {
1192                                 foreach my $par (@{$params{$name}}) {
1193                                         push @result, $symbol . "=" . esc_param($par);
1194                                 }
1195                         } else {
1196                                 push @result, $symbol . "=" . esc_param($params{$name});
1197                         }
1198                 }
1199         }
1200         $href .= "?" . join(';', @result) if scalar @result;
1201
1202         return $href;
1203 }
1204
1205
1206 ## ======================================================================
1207 ## validation, quoting/unquoting and escaping
1208
1209 sub validate_action {
1210         my $input = shift || return undef;
1211         return undef unless exists $actions{$input};
1212         return $input;
1213 }
1214
1215 sub validate_project {
1216         my $input = shift || return undef;
1217         if (!validate_pathname($input) ||
1218                 !(-d "$projectroot/$input") ||
1219                 !check_export_ok("$projectroot/$input") ||
1220                 ($strict_export && !project_in_list($input))) {
1221                 return undef;
1222         } else {
1223                 return $input;
1224         }
1225 }
1226
1227 sub validate_pathname {
1228         my $input = shift || return undef;
1229
1230         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1231         # at the beginning, at the end, and between slashes.
1232         # also this catches doubled slashes
1233         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1234                 return undef;
1235         }
1236         # no null characters
1237         if ($input =~ m!\0!) {
1238                 return undef;
1239         }
1240         return $input;
1241 }
1242
1243 sub validate_refname {
1244         my $input = shift || return undef;
1245
1246         # textual hashes are O.K.
1247         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1248                 return $input;
1249         }
1250         # it must be correct pathname
1251         $input = validate_pathname($input)
1252                 or return undef;
1253         # restrictions on ref name according to git-check-ref-format
1254         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1255                 return undef;
1256         }
1257         return $input;
1258 }
1259
1260 # decode sequences of octets in utf8 into Perl's internal form,
1261 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1262 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1263 sub to_utf8 {
1264         my $str = shift;
1265         return undef unless defined $str;
1266         if (utf8::valid($str)) {
1267                 utf8::decode($str);
1268                 return $str;
1269         } else {
1270                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1271         }
1272 }
1273
1274 # quote unsafe chars, but keep the slash, even when it's not
1275 # correct, but quoted slashes look too horrible in bookmarks
1276 sub esc_param {
1277         my $str = shift;
1278         return undef unless defined $str;
1279         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1280         $str =~ s/ /\+/g;
1281         return $str;
1282 }
1283
1284 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1285 sub esc_url {
1286         my $str = shift;
1287         return undef unless defined $str;
1288         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1289         $str =~ s/\+/%2B/g;
1290         $str =~ s/ /\+/g;
1291         return $str;
1292 }
1293
1294 # replace invalid utf8 character with SUBSTITUTION sequence
1295 sub esc_html {
1296         my $str = shift;
1297         my %opts = @_;
1298
1299         return undef unless defined $str;
1300
1301         $str = to_utf8($str);
1302         $str = $cgi->escapeHTML($str);
1303         if ($opts{'-nbsp'}) {
1304                 $str =~ s/ /&nbsp;/g;
1305         }
1306         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1307         return $str;
1308 }
1309
1310 # quote control characters and escape filename to HTML
1311 sub esc_path {
1312         my $str = shift;
1313         my %opts = @_;
1314
1315         return undef unless defined $str;
1316
1317         $str = to_utf8($str);
1318         $str = $cgi->escapeHTML($str);
1319         if ($opts{'-nbsp'}) {
1320                 $str =~ s/ /&nbsp;/g;
1321         }
1322         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1323         return $str;
1324 }
1325
1326 # Make control characters "printable", using character escape codes (CEC)
1327 sub quot_cec {
1328         my $cntrl = shift;
1329         my %opts = @_;
1330         my %es = ( # character escape codes, aka escape sequences
1331                 "\t" => '\t',   # tab            (HT)
1332                 "\n" => '\n',   # line feed      (LF)
1333                 "\r" => '\r',   # carrige return (CR)
1334                 "\f" => '\f',   # form feed      (FF)
1335                 "\b" => '\b',   # backspace      (BS)
1336                 "\a" => '\a',   # alarm (bell)   (BEL)
1337                 "\e" => '\e',   # escape         (ESC)
1338                 "\013" => '\v', # vertical tab   (VT)
1339                 "\000" => '\0', # nul character  (NUL)
1340         );
1341         my $chr = ( (exists $es{$cntrl})
1342                     ? $es{$cntrl}
1343                     : sprintf('\%2x', ord($cntrl)) );
1344         if ($opts{-nohtml}) {
1345                 return $chr;
1346         } else {
1347                 return "<span class=\"cntrl\">$chr</span>";
1348         }
1349 }
1350
1351 # Alternatively use unicode control pictures codepoints,
1352 # Unicode "printable representation" (PR)
1353 sub quot_upr {
1354         my $cntrl = shift;
1355         my %opts = @_;
1356
1357         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1358         if ($opts{-nohtml}) {
1359                 return $chr;
1360         } else {
1361                 return "<span class=\"cntrl\">$chr</span>";
1362         }
1363 }
1364
1365 # git may return quoted and escaped filenames
1366 sub unquote {
1367         my $str = shift;
1368
1369         sub unq {
1370                 my $seq = shift;
1371                 my %es = ( # character escape codes, aka escape sequences
1372                         't' => "\t",   # tab            (HT, TAB)
1373                         'n' => "\n",   # newline        (NL)
1374                         'r' => "\r",   # return         (CR)
1375                         'f' => "\f",   # form feed      (FF)
1376                         'b' => "\b",   # backspace      (BS)
1377                         'a' => "\a",   # alarm (bell)   (BEL)
1378                         'e' => "\e",   # escape         (ESC)
1379                         'v' => "\013", # vertical tab   (VT)
1380                 );
1381
1382                 if ($seq =~ m/^[0-7]{1,3}$/) {
1383                         # octal char sequence
1384                         return chr(oct($seq));
1385                 } elsif (exists $es{$seq}) {
1386                         # C escape sequence, aka character escape code
1387                         return $es{$seq};
1388                 }
1389                 # quoted ordinary character
1390                 return $seq;
1391         }
1392
1393         if ($str =~ m/^"(.*)"$/) {
1394                 # needs unquoting
1395                 $str = $1;
1396                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1397         }
1398         return $str;
1399 }
1400
1401 # escape tabs (convert tabs to spaces)
1402 sub untabify {
1403         my $line = shift;
1404
1405         while ((my $pos = index($line, "\t")) != -1) {
1406                 if (my $count = (8 - ($pos % 8))) {
1407                         my $spaces = ' ' x $count;
1408                         $line =~ s/\t/$spaces/;
1409                 }
1410         }
1411
1412         return $line;
1413 }
1414
1415 sub project_in_list {
1416         my $project = shift;
1417         my @list = git_get_projects_list();
1418         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1419 }
1420
1421 ## ----------------------------------------------------------------------
1422 ## HTML aware string manipulation
1423
1424 # Try to chop given string on a word boundary between position
1425 # $len and $len+$add_len. If there is no word boundary there,
1426 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1427 # (marking chopped part) would be longer than given string.
1428 sub chop_str {
1429         my $str = shift;
1430         my $len = shift;
1431         my $add_len = shift || 10;
1432         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1433
1434         # Make sure perl knows it is utf8 encoded so we don't
1435         # cut in the middle of a utf8 multibyte char.
1436         $str = to_utf8($str);
1437
1438         # allow only $len chars, but don't cut a word if it would fit in $add_len
1439         # if it doesn't fit, cut it if it's still longer than the dots we would add
1440         # remove chopped character entities entirely
1441
1442         # when chopping in the middle, distribute $len into left and right part
1443         # return early if chopping wouldn't make string shorter
1444         if ($where eq 'center') {
1445                 return $str if ($len + 5 >= length($str)); # filler is length 5
1446                 $len = int($len/2);
1447         } else {
1448                 return $str if ($len + 4 >= length($str)); # filler is length 4
1449         }
1450
1451         # regexps: ending and beginning with word part up to $add_len
1452         my $endre = qr/.{$len}\w{0,$add_len}/;
1453         my $begre = qr/\w{0,$add_len}.{$len}/;
1454
1455         if ($where eq 'left') {
1456                 $str =~ m/^(.*?)($begre)$/;
1457                 my ($lead, $body) = ($1, $2);
1458                 if (length($lead) > 4) {
1459                         $lead = " ...";
1460                 }
1461                 return "$lead$body";
1462
1463         } elsif ($where eq 'center') {
1464                 $str =~ m/^($endre)(.*)$/;
1465                 my ($left, $str)  = ($1, $2);
1466                 $str =~ m/^(.*?)($begre)$/;
1467                 my ($mid, $right) = ($1, $2);
1468                 if (length($mid) > 5) {
1469                         $mid = " ... ";
1470                 }
1471                 return "$left$mid$right";
1472
1473         } else {
1474                 $str =~ m/^($endre)(.*)$/;
1475                 my $body = $1;
1476                 my $tail = $2;
1477                 if (length($tail) > 4) {
1478                         $tail = "... ";
1479                 }
1480                 return "$body$tail";
1481         }
1482 }
1483
1484 # takes the same arguments as chop_str, but also wraps a <span> around the
1485 # result with a title attribute if it does get chopped. Additionally, the
1486 # string is HTML-escaped.
1487 sub chop_and_escape_str {
1488         my ($str) = @_;
1489
1490         my $chopped = chop_str(@_);
1491         if ($chopped eq $str) {
1492                 return esc_html($chopped);
1493         } else {
1494                 $str =~ s/[[:cntrl:]]/?/g;
1495                 return $cgi->span({-title=>$str}, esc_html($chopped));
1496         }
1497 }
1498
1499 ## ----------------------------------------------------------------------
1500 ## functions returning short strings
1501
1502 # CSS class for given age value (in seconds)
1503 sub age_class {
1504         my $age = shift;
1505
1506         if (!defined $age) {
1507                 return "noage";
1508         } elsif ($age < 60*60*2) {
1509                 return "age0";
1510         } elsif ($age < 60*60*24*2) {
1511                 return "age1";
1512         } else {
1513                 return "age2";
1514         }
1515 }
1516
1517 # convert age in seconds to "nn units ago" string
1518 sub age_string {
1519         my $age = shift;
1520         my $age_str;
1521
1522         if ($age > 60*60*24*365*2) {
1523                 $age_str = (int $age/60/60/24/365);
1524                 $age_str .= " years ago";
1525         } elsif ($age > 60*60*24*(365/12)*2) {
1526                 $age_str = int $age/60/60/24/(365/12);
1527                 $age_str .= " months ago";
1528         } elsif ($age > 60*60*24*7*2) {
1529                 $age_str = int $age/60/60/24/7;
1530                 $age_str .= " weeks ago";
1531         } elsif ($age > 60*60*24*2) {
1532                 $age_str = int $age/60/60/24;
1533                 $age_str .= " days ago";
1534         } elsif ($age > 60*60*2) {
1535                 $age_str = int $age/60/60;
1536                 $age_str .= " hours ago";
1537         } elsif ($age > 60*2) {
1538                 $age_str = int $age/60;
1539                 $age_str .= " min ago";
1540         } elsif ($age > 2) {
1541                 $age_str = int $age;
1542                 $age_str .= " sec ago";
1543         } else {
1544                 $age_str .= " right now";
1545         }
1546         return $age_str;
1547 }
1548
1549 use constant {
1550         S_IFINVALID => 0030000,
1551         S_IFGITLINK => 0160000,
1552 };
1553
1554 # submodule/subproject, a commit object reference
1555 sub S_ISGITLINK {
1556         my $mode = shift;
1557
1558         return (($mode & S_IFMT) == S_IFGITLINK)
1559 }
1560
1561 # convert file mode in octal to symbolic file mode string
1562 sub mode_str {
1563         my $mode = oct shift;
1564
1565         if (S_ISGITLINK($mode)) {
1566                 return 'm---------';
1567         } elsif (S_ISDIR($mode & S_IFMT)) {
1568                 return 'drwxr-xr-x';
1569         } elsif (S_ISLNK($mode)) {
1570                 return 'lrwxrwxrwx';
1571         } elsif (S_ISREG($mode)) {
1572                 # git cares only about the executable bit
1573                 if ($mode & S_IXUSR) {
1574                         return '-rwxr-xr-x';
1575                 } else {
1576                         return '-rw-r--r--';
1577                 };
1578         } else {
1579                 return '----------';
1580         }
1581 }
1582
1583 # convert file mode in octal to file type string
1584 sub file_type {
1585         my $mode = shift;
1586
1587         if ($mode !~ m/^[0-7]+$/) {
1588                 return $mode;
1589         } else {
1590                 $mode = oct $mode;
1591         }
1592
1593         if (S_ISGITLINK($mode)) {
1594                 return "submodule";
1595         } elsif (S_ISDIR($mode & S_IFMT)) {
1596                 return "directory";
1597         } elsif (S_ISLNK($mode)) {
1598                 return "symlink";
1599         } elsif (S_ISREG($mode)) {
1600                 return "file";
1601         } else {
1602                 return "unknown";
1603         }
1604 }
1605
1606 # convert file mode in octal to file type description string
1607 sub file_type_long {
1608         my $mode = shift;
1609
1610         if ($mode !~ m/^[0-7]+$/) {
1611                 return $mode;
1612         } else {
1613                 $mode = oct $mode;
1614         }
1615
1616         if (S_ISGITLINK($mode)) {
1617                 return "submodule";
1618         } elsif (S_ISDIR($mode & S_IFMT)) {
1619                 return "directory";
1620         } elsif (S_ISLNK($mode)) {
1621                 return "symlink";
1622         } elsif (S_ISREG($mode)) {
1623                 if ($mode & S_IXUSR) {
1624                         return "executable";
1625                 } else {
1626                         return "file";
1627                 };
1628         } else {
1629                 return "unknown";
1630         }
1631 }
1632
1633
1634 ## ----------------------------------------------------------------------
1635 ## functions returning short HTML fragments, or transforming HTML fragments
1636 ## which don't belong to other sections
1637
1638 # format line of commit message.
1639 sub format_log_line_html {
1640         my $line = shift;
1641
1642         $line = esc_html($line, -nbsp=>1);
1643         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1644                 $cgi->a({-href => href(action=>"object", hash=>$1),
1645                                         -class => "text"}, $1);
1646         }eg;
1647
1648         return $line;
1649 }
1650
1651 # format marker of refs pointing to given object
1652
1653 # the destination action is chosen based on object type and current context:
1654 # - for annotated tags, we choose the tag view unless it's the current view
1655 #   already, in which case we go to shortlog view
1656 # - for other refs, we keep the current view if we're in history, shortlog or
1657 #   log view, and select shortlog otherwise
1658 sub format_ref_marker {
1659         my ($refs, $id) = @_;
1660         my $markers = '';
1661
1662         if (defined $refs->{$id}) {
1663                 foreach my $ref (@{$refs->{$id}}) {
1664                         # this code exploits the fact that non-lightweight tags are the
1665                         # only indirect objects, and that they are the only objects for which
1666                         # we want to use tag instead of shortlog as action
1667                         my ($type, $name) = qw();
1668                         my $indirect = ($ref =~ s/\^\{\}$//);
1669                         # e.g. tags/v2.6.11 or heads/next
1670                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1671                                 $type = $1;
1672                                 $name = $2;
1673                         } else {
1674                                 $type = "ref";
1675                                 $name = $ref;
1676                         }
1677
1678                         my $class = $type;
1679                         $class .= " indirect" if $indirect;
1680
1681                         my $dest_action = "shortlog";
1682
1683                         if ($indirect) {
1684                                 $dest_action = "tag" unless $action eq "tag";
1685                         } elsif ($action =~ /^(history|(short)?log)$/) {
1686                                 $dest_action = $action;
1687                         }
1688
1689                         my $dest = "";
1690                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1691                         $dest .= $ref;
1692
1693                         my $link = $cgi->a({
1694                                 -href => href(
1695                                         action=>$dest_action,
1696                                         hash=>$dest
1697                                 )}, $name);
1698
1699                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1700                                 $link . "</span>";
1701                 }
1702         }
1703
1704         if ($markers) {
1705                 return ' <span class="refs">'. $markers . '</span>';
1706         } else {
1707                 return "";
1708         }
1709 }
1710
1711 # format, perhaps shortened and with markers, title line
1712 sub format_subject_html {
1713         my ($long, $short, $href, $extra) = @_;
1714         $extra = '' unless defined($extra);
1715
1716         if (length($short) < length($long)) {
1717                 $long =~ s/[[:cntrl:]]/?/g;
1718                 return $cgi->a({-href => $href, -class => "list subject",
1719                                 -title => to_utf8($long)},
1720                        esc_html($short)) . $extra;
1721         } else {
1722                 return $cgi->a({-href => $href, -class => "list subject"},
1723                        esc_html($long)) . $extra;
1724         }
1725 }
1726
1727 # Rather than recomputing the url for an email multiple times, we cache it
1728 # after the first hit. This gives a visible benefit in views where the avatar
1729 # for the same email is used repeatedly (e.g. shortlog).
1730 # The cache is shared by all avatar engines (currently gravatar only), which
1731 # are free to use it as preferred. Since only one avatar engine is used for any
1732 # given page, there's no risk for cache conflicts.
1733 our %avatar_cache = ();
1734
1735 # Compute the picon url for a given email, by using the picon search service over at
1736 # http://www.cs.indiana.edu/picons/search.html
1737 sub picon_url {
1738         my $email = lc shift;
1739         if (!$avatar_cache{$email}) {
1740                 my ($user, $domain) = split('@', $email);
1741                 $avatar_cache{$email} =
1742                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1743                         "$domain/$user/" .
1744                         "users+domains+unknown/up/single";
1745         }
1746         return $avatar_cache{$email};
1747 }
1748
1749 # Compute the gravatar url for a given email, if it's not in the cache already.
1750 # Gravatar stores only the part of the URL before the size, since that's the
1751 # one computationally more expensive. This also allows reuse of the cache for
1752 # different sizes (for this particular engine).
1753 sub gravatar_url {
1754         my $email = lc shift;
1755         my $size = shift;
1756         $avatar_cache{$email} ||=
1757                 "http://www.gravatar.com/avatar/" .
1758                         Digest::MD5::md5_hex($email) . "?s=";
1759         return $avatar_cache{$email} . $size;
1760 }
1761
1762 # Insert an avatar for the given $email at the given $size if the feature
1763 # is enabled.
1764 sub git_get_avatar {
1765         my ($email, %opts) = @_;
1766         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1767         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1768         $opts{-size} ||= 'default';
1769         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1770         my $url = "";
1771         if ($git_avatar eq 'gravatar') {
1772                 $url = gravatar_url($email, $size);
1773         } elsif ($git_avatar eq 'picon') {
1774                 $url = picon_url($email);
1775         }
1776         # Other providers can be added by extending the if chain, defining $url
1777         # as needed. If no variant puts something in $url, we assume avatars
1778         # are completely disabled/unavailable.
1779         if ($url) {
1780                 return $pre_white .
1781                        "<img width=\"$size\" " .
1782                             "class=\"avatar\" " .
1783                             "src=\"$url\" " .
1784                             "alt=\"\" " .
1785                        "/>" . $post_white;
1786         } else {
1787                 return "";
1788         }
1789 }
1790
1791 sub format_search_author {
1792         my ($author, $searchtype, $displaytext) = @_;
1793         my $have_search = gitweb_check_feature('search');
1794
1795         if ($have_search) {
1796                 my $performed = "";
1797                 if ($searchtype eq 'author') {
1798                         $performed = "authored";
1799                 } elsif ($searchtype eq 'committer') {
1800                         $performed = "committed";
1801                 }
1802
1803                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1804                                 searchtext=>$author,
1805                                 searchtype=>$searchtype), class=>"list",
1806                                 title=>"Search for commits $performed by $author"},
1807                                 $displaytext);
1808
1809         } else {
1810                 return $displaytext;
1811         }
1812 }
1813
1814 # format the author name of the given commit with the given tag
1815 # the author name is chopped and escaped according to the other
1816 # optional parameters (see chop_str).
1817 sub format_author_html {
1818         my $tag = shift;
1819         my $co = shift;
1820         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1821         return "<$tag class=\"author\">" .
1822                format_search_author($co->{'author_name'}, "author",
1823                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1824                        $author) .
1825                "</$tag>";
1826 }
1827
1828 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1829 sub format_git_diff_header_line {
1830         my $line = shift;
1831         my $diffinfo = shift;
1832         my ($from, $to) = @_;
1833
1834         if ($diffinfo->{'nparents'}) {
1835                 # combined diff
1836                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1837                 if ($to->{'href'}) {
1838                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1839                                          esc_path($to->{'file'}));
1840                 } else { # file was deleted (no href)
1841                         $line .= esc_path($to->{'file'});
1842                 }
1843         } else {
1844                 # "ordinary" diff
1845                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1846                 if ($from->{'href'}) {
1847                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1848                                          'a/' . esc_path($from->{'file'}));
1849                 } else { # file was added (no href)
1850                         $line .= 'a/' . esc_path($from->{'file'});
1851                 }
1852                 $line .= ' ';
1853                 if ($to->{'href'}) {
1854                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1855                                          'b/' . esc_path($to->{'file'}));
1856                 } else { # file was deleted
1857                         $line .= 'b/' . esc_path($to->{'file'});
1858                 }
1859         }
1860
1861         return "<div class=\"diff header\">$line</div>\n";
1862 }
1863
1864 # format extended diff header line, before patch itself
1865 sub format_extended_diff_header_line {
1866         my $line = shift;
1867         my $diffinfo = shift;
1868         my ($from, $to) = @_;
1869
1870         # match <path>
1871         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1872                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1873                                        esc_path($from->{'file'}));
1874         }
1875         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1876                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1877                                  esc_path($to->{'file'}));
1878         }
1879         # match single <mode>
1880         if ($line =~ m/\s(\d{6})$/) {
1881                 $line .= '<span class="info"> (' .
1882                          file_type_long($1) .
1883                          ')</span>';
1884         }
1885         # match <hash>
1886         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1887                 # can match only for combined diff
1888                 $line = 'index ';
1889                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1890                         if ($from->{'href'}[$i]) {
1891                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1892                                                   -class=>"hash"},
1893                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1894                         } else {
1895                                 $line .= '0' x 7;
1896                         }
1897                         # separator
1898                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1899                 }
1900                 $line .= '..';
1901                 if ($to->{'href'}) {
1902                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1903                                          substr($diffinfo->{'to_id'},0,7));
1904                 } else {
1905                         $line .= '0' x 7;
1906                 }
1907
1908         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1909                 # can match only for ordinary diff
1910                 my ($from_link, $to_link);
1911                 if ($from->{'href'}) {
1912                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1913                                              substr($diffinfo->{'from_id'},0,7));
1914                 } else {
1915                         $from_link = '0' x 7;
1916                 }
1917                 if ($to->{'href'}) {
1918                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1919                                            substr($diffinfo->{'to_id'},0,7));
1920                 } else {
1921                         $to_link = '0' x 7;
1922                 }
1923                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1924                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1925         }
1926
1927         return $line . "<br/>\n";
1928 }
1929
1930 # format from-file/to-file diff header
1931 sub format_diff_from_to_header {
1932         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1933         my $line;
1934         my $result = '';
1935
1936         $line = $from_line;
1937         #assert($line =~ m/^---/) if DEBUG;
1938         # no extra formatting for "^--- /dev/null"
1939         if (! $diffinfo->{'nparents'}) {
1940                 # ordinary (single parent) diff
1941                 if ($line =~ m!^--- "?a/!) {
1942                         if ($from->{'href'}) {
1943                                 $line = '--- a/' .
1944                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1945                                                 esc_path($from->{'file'}));
1946                         } else {
1947                                 $line = '--- a/' .
1948                                         esc_path($from->{'file'});
1949                         }
1950                 }
1951                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1952
1953         } else {
1954                 # combined diff (merge commit)
1955                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1956                         if ($from->{'href'}[$i]) {
1957                                 $line = '--- ' .
1958                                         $cgi->a({-href=>href(action=>"blobdiff",
1959                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1960                                                              hash_parent_base=>$parents[$i],
1961                                                              file_parent=>$from->{'file'}[$i],
1962                                                              hash=>$diffinfo->{'to_id'},
1963                                                              hash_base=>$hash,
1964                                                              file_name=>$to->{'file'}),
1965                                                  -class=>"path",
1966                                                  -title=>"diff" . ($i+1)},
1967                                                 $i+1) .
1968                                         '/' .
1969                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1970                                                 esc_path($from->{'file'}[$i]));
1971                         } else {
1972                                 $line = '--- /dev/null';
1973                         }
1974                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1975                 }
1976         }
1977
1978         $line = $to_line;
1979         #assert($line =~ m/^\+\+\+/) if DEBUG;
1980         # no extra formatting for "^+++ /dev/null"
1981         if ($line =~ m!^\+\+\+ "?b/!) {
1982                 if ($to->{'href'}) {
1983                         $line = '+++ b/' .
1984                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1985                                         esc_path($to->{'file'}));
1986                 } else {
1987                         $line = '+++ b/' .
1988                                 esc_path($to->{'file'});
1989                 }
1990         }
1991         $result .= qq!<div class="diff to_file">$line</div>\n!;
1992
1993         return $result;
1994 }
1995
1996 # create note for patch simplified by combined diff
1997 sub format_diff_cc_simplified {
1998         my ($diffinfo, @parents) = @_;
1999         my $result = '';
2000
2001         $result .= "<div class=\"diff header\">" .
2002                    "diff --cc ";
2003         if (!is_deleted($diffinfo)) {
2004                 $result .= $cgi->a({-href => href(action=>"blob",
2005                                                   hash_base=>$hash,
2006                                                   hash=>$diffinfo->{'to_id'},
2007                                                   file_name=>$diffinfo->{'to_file'}),
2008                                     -class => "path"},
2009                                    esc_path($diffinfo->{'to_file'}));
2010         } else {
2011                 $result .= esc_path($diffinfo->{'to_file'});
2012         }
2013         $result .= "</div>\n" . # class="diff header"
2014                    "<div class=\"diff nodifferences\">" .
2015                    "Simple merge" .
2016                    "</div>\n"; # class="diff nodifferences"
2017
2018         return $result;
2019 }
2020
2021 # format patch (diff) line (not to be used for diff headers)
2022 sub format_diff_line {
2023         my $line = shift;
2024         my ($from, $to) = @_;
2025         my $diff_class = "";
2026
2027         chomp $line;
2028
2029         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2030                 # combined diff
2031                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2032                 if ($line =~ m/^\@{3}/) {
2033                         $diff_class = " chunk_header";
2034                 } elsif ($line =~ m/^\\/) {
2035                         $diff_class = " incomplete";
2036                 } elsif ($prefix =~ tr/+/+/) {
2037                         $diff_class = " add";
2038                 } elsif ($prefix =~ tr/-/-/) {
2039                         $diff_class = " rem";
2040                 }
2041         } else {
2042                 # assume ordinary diff
2043                 my $char = substr($line, 0, 1);
2044                 if ($char eq '+') {
2045                         $diff_class = " add";
2046                 } elsif ($char eq '-') {
2047                         $diff_class = " rem";
2048                 } elsif ($char eq '@') {
2049                         $diff_class = " chunk_header";
2050                 } elsif ($char eq "\\") {
2051                         $diff_class = " incomplete";
2052                 }
2053         }
2054         $line = untabify($line);
2055         if ($from && $to && $line =~ m/^\@{2} /) {
2056                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2057                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2058
2059                 $from_lines = 0 unless defined $from_lines;
2060                 $to_lines   = 0 unless defined $to_lines;
2061
2062                 if ($from->{'href'}) {
2063                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2064                                              -class=>"list"}, $from_text);
2065                 }
2066                 if ($to->{'href'}) {
2067                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2068                                              -class=>"list"}, $to_text);
2069                 }
2070                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2071                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2072                 return "<div class=\"diff$diff_class\">$line</div>\n";
2073         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2074                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2075                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2076
2077                 @from_text = split(' ', $ranges);
2078                 for (my $i = 0; $i < @from_text; ++$i) {
2079                         ($from_start[$i], $from_nlines[$i]) =
2080                                 (split(',', substr($from_text[$i], 1)), 0);
2081                 }
2082
2083                 $to_text   = pop @from_text;
2084                 $to_start  = pop @from_start;
2085                 $to_nlines = pop @from_nlines;
2086
2087                 $line = "<span class=\"chunk_info\">$prefix ";
2088                 for (my $i = 0; $i < @from_text; ++$i) {
2089                         if ($from->{'href'}[$i]) {
2090                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2091                                                   -class=>"list"}, $from_text[$i]);
2092                         } else {
2093                                 $line .= $from_text[$i];
2094                         }
2095                         $line .= " ";
2096                 }
2097                 if ($to->{'href'}) {
2098                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2099                                           -class=>"list"}, $to_text);
2100                 } else {
2101                         $line .= $to_text;
2102                 }
2103                 $line .= " $prefix</span>" .
2104                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2105                 return "<div class=\"diff$diff_class\">$line</div>\n";
2106         }
2107         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2108 }
2109
2110 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2111 # linked.  Pass the hash of the tree/commit to snapshot.
2112 sub format_snapshot_links {
2113         my ($hash) = @_;
2114         my $num_fmts = @snapshot_fmts;
2115         if ($num_fmts > 1) {
2116                 # A parenthesized list of links bearing format names.
2117                 # e.g. "snapshot (_tar.gz_ _zip_)"
2118                 return "snapshot (" . join(' ', map
2119                         $cgi->a({
2120                                 -href => href(
2121                                         action=>"snapshot",
2122                                         hash=>$hash,
2123                                         snapshot_format=>$_
2124                                 )
2125                         }, $known_snapshot_formats{$_}{'display'})
2126                 , @snapshot_fmts) . ")";
2127         } elsif ($num_fmts == 1) {
2128                 # A single "snapshot" link whose tooltip bears the format name.
2129                 # i.e. "_snapshot_"
2130                 my ($fmt) = @snapshot_fmts;
2131                 return
2132                         $cgi->a({
2133                                 -href => href(
2134                                         action=>"snapshot",
2135                                         hash=>$hash,
2136                                         snapshot_format=>$fmt
2137                                 ),
2138                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2139                         }, "snapshot");
2140         } else { # $num_fmts == 0
2141                 return undef;
2142         }
2143 }
2144
2145 ## ......................................................................
2146 ## functions returning values to be passed, perhaps after some
2147 ## transformation, to other functions; e.g. returning arguments to href()
2148
2149 # returns hash to be passed to href to generate gitweb URL
2150 # in -title key it returns description of link
2151 sub get_feed_info {
2152         my $format = shift || 'Atom';
2153         my %res = (action => lc($format));
2154
2155         # feed links are possible only for project views
2156         return unless (defined $project);
2157         # some views should link to OPML, or to generic project feed,
2158         # or don't have specific feed yet (so they should use generic)
2159         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2160
2161         my $branch;
2162         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2163         # from tag links; this also makes possible to detect branch links
2164         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2165             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2166                 $branch = $1;
2167         }
2168         # find log type for feed description (title)
2169         my $type = 'log';
2170         if (defined $file_name) {
2171                 $type  = "history of $file_name";
2172                 $type .= "/" if ($action eq 'tree');
2173                 $type .= " on '$branch'" if (defined $branch);
2174         } else {
2175                 $type = "log of $branch" if (defined $branch);
2176         }
2177
2178         $res{-title} = $type;
2179         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2180         $res{'file_name'} = $file_name;
2181
2182         return %res;
2183 }
2184
2185 ## ----------------------------------------------------------------------
2186 ## git utility subroutines, invoking git commands
2187
2188 # returns path to the core git executable and the --git-dir parameter as list
2189 sub git_cmd {
2190         $number_of_git_cmds++;
2191         return $GIT, '--git-dir='.$git_dir;
2192 }
2193
2194 # quote the given arguments for passing them to the shell
2195 # quote_command("command", "arg 1", "arg with ' and ! characters")
2196 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2197 # Try to avoid using this function wherever possible.
2198 sub quote_command {
2199         return join(' ',
2200                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2201 }
2202
2203 # get HEAD ref of given project as hash
2204 sub git_get_head_hash {
2205         return git_get_full_hash(shift, 'HEAD');
2206 }
2207
2208 sub git_get_full_hash {
2209         return git_get_hash(@_);
2210 }
2211
2212 sub git_get_short_hash {
2213         return git_get_hash(@_, '--short=7');
2214 }
2215
2216 sub git_get_hash {
2217         my ($project, $hash, @options) = @_;
2218         my $o_git_dir = $git_dir;
2219         my $retval = undef;
2220         $git_dir = "$projectroot/$project";
2221         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2222             '--verify', '-q', @options, $hash) {
2223                 $retval = <$fd>;
2224                 chomp $retval if defined $retval;
2225                 close $fd;
2226         }
2227         if (defined $o_git_dir) {
2228                 $git_dir = $o_git_dir;
2229         }
2230         return $retval;
2231 }
2232
2233 # get type of given object
2234 sub git_get_type {
2235         my $hash = shift;
2236
2237         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2238         my $type = <$fd>;
2239         close $fd or return;
2240         chomp $type;
2241         return $type;
2242 }
2243
2244 # repository configuration
2245 our $config_file = '';
2246 our %config;
2247
2248 # store multiple values for single key as anonymous array reference
2249 # single values stored directly in the hash, not as [ <value> ]
2250 sub hash_set_multi {
2251         my ($hash, $key, $value) = @_;
2252
2253         if (!exists $hash->{$key}) {
2254                 $hash->{$key} = $value;
2255         } elsif (!ref $hash->{$key}) {
2256                 $hash->{$key} = [ $hash->{$key}, $value ];
2257         } else {
2258                 push @{$hash->{$key}}, $value;
2259         }
2260 }
2261
2262 # return hash of git project configuration
2263 # optionally limited to some section, e.g. 'gitweb'
2264 sub git_parse_project_config {
2265         my $section_regexp = shift;
2266         my %config;
2267
2268         local $/ = "\0";
2269
2270         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2271                 or return;
2272
2273         while (my $keyval = <$fh>) {
2274                 chomp $keyval;
2275                 my ($key, $value) = split(/\n/, $keyval, 2);
2276
2277                 hash_set_multi(\%config, $key, $value)
2278                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2279         }
2280         close $fh;
2281
2282         return %config;
2283 }
2284
2285 # convert config value to boolean: 'true' or 'false'
2286 # no value, number > 0, 'true' and 'yes' values are true
2287 # rest of values are treated as false (never as error)
2288 sub config_to_bool {
2289         my $val = shift;
2290
2291         return 1 if !defined $val;             # section.key
2292
2293         # strip leading and trailing whitespace
2294         $val =~ s/^\s+//;
2295         $val =~ s/\s+$//;
2296
2297         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2298                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2299 }
2300
2301 # convert config value to simple decimal number
2302 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2303 # to be multiplied by 1024, 1048576, or 1073741824
2304 sub config_to_int {
2305         my $val = shift;
2306
2307         # strip leading and trailing whitespace
2308         $val =~ s/^\s+//;
2309         $val =~ s/\s+$//;
2310
2311         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2312                 $unit = lc($unit);
2313                 # unknown unit is treated as 1
2314                 return $num * ($unit eq 'g' ? 1073741824 :
2315                                $unit eq 'm' ?    1048576 :
2316                                $unit eq 'k' ?       1024 : 1);
2317         }
2318         return $val;
2319 }
2320
2321 # convert config value to array reference, if needed
2322 sub config_to_multi {
2323         my $val = shift;
2324
2325         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2326 }
2327
2328 sub git_get_project_config {
2329         my ($key, $type) = @_;
2330
2331         return unless defined $git_dir;
2332
2333         # key sanity check
2334         return unless ($key);
2335         $key =~ s/^gitweb\.//;
2336         return if ($key =~ m/\W/);
2337
2338         # type sanity check
2339         if (defined $type) {
2340                 $type =~ s/^--//;
2341                 $type = undef
2342                         unless ($type eq 'bool' || $type eq 'int');
2343         }
2344
2345         # get config
2346         if (!defined $config_file ||
2347             $config_file ne "$git_dir/config") {
2348                 %config = git_parse_project_config('gitweb');
2349                 $config_file = "$git_dir/config";
2350         }
2351
2352         # check if config variable (key) exists
2353         return unless exists $config{"gitweb.$key"};
2354
2355         # ensure given type
2356         if (!defined $type) {
2357                 return $config{"gitweb.$key"};
2358         } elsif ($type eq 'bool') {
2359                 # backward compatibility: 'git config --bool' returns true/false
2360                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2361         } elsif ($type eq 'int') {
2362                 return config_to_int($config{"gitweb.$key"});
2363         }
2364         return $config{"gitweb.$key"};
2365 }
2366
2367 # get hash of given path at given ref
2368 sub git_get_hash_by_path {
2369         my $base = shift;
2370         my $path = shift || return undef;
2371         my $type = shift;
2372
2373         $path =~ s,/+$,,;
2374
2375         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2376                 or die_error(500, "Open git-ls-tree failed");
2377         my $line = <$fd>;
2378         close $fd or return undef;
2379
2380         if (!defined $line) {
2381                 # there is no tree or hash given by $path at $base
2382                 return undef;
2383         }
2384
2385         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2386         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2387         if (defined $type && $type ne $2) {
2388                 # type doesn't match
2389                 return undef;
2390         }
2391         return $3;
2392 }
2393
2394 # get path of entry with given hash at given tree-ish (ref)
2395 # used to get 'from' filename for combined diff (merge commit) for renames
2396 sub git_get_path_by_hash {
2397         my $base = shift || return;
2398         my $hash = shift || return;
2399
2400         local $/ = "\0";
2401
2402         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2403                 or return undef;
2404         while (my $line = <$fd>) {
2405                 chomp $line;
2406
2407                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2408                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2409                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2410                         close $fd;
2411                         return $1;
2412                 }
2413         }
2414         close $fd;
2415         return undef;
2416 }
2417
2418 ## ......................................................................
2419 ## git utility functions, directly accessing git repository
2420
2421 sub git_get_project_description {
2422         my $path = shift;
2423
2424         $git_dir = "$projectroot/$path";
2425         open my $fd, '<', "$git_dir/description"
2426                 or return git_get_project_config('description');
2427         my $descr = <$fd>;
2428         close $fd;
2429         if (defined $descr) {
2430                 chomp $descr;
2431         }
2432         return $descr;
2433 }
2434
2435 sub git_get_project_ctags {
2436         my $path = shift;
2437         my $ctags = {};
2438
2439         $git_dir = "$projectroot/$path";
2440         opendir my $dh, "$git_dir/ctags"
2441                 or return $ctags;
2442         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2443                 open my $ct, '<', $_ or next;
2444                 my $val = <$ct>;
2445                 chomp $val;
2446                 close $ct;
2447                 my $ctag = $_; $ctag =~ s#.*/##;
2448                 $ctags->{$ctag} = $val;
2449         }
2450         closedir $dh;
2451         $ctags;
2452 }
2453
2454 sub git_populate_project_tagcloud {
2455         my $ctags = shift;
2456
2457         # First, merge different-cased tags; tags vote on casing
2458         my %ctags_lc;
2459         foreach (keys %$ctags) {
2460                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2461                 if (not $ctags_lc{lc $_}->{topcount}
2462                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2463                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2464                         $ctags_lc{lc $_}->{topname} = $_;
2465                 }
2466         }
2467
2468         my $cloud;
2469         if (eval { require HTML::TagCloud; 1; }) {
2470                 $cloud = HTML::TagCloud->new;
2471                 foreach (sort keys %ctags_lc) {
2472                         # Pad the title with spaces so that the cloud looks
2473                         # less crammed.
2474                         my $title = $ctags_lc{$_}->{topname};
2475                         $title =~ s/ /&nbsp;/g;
2476                         $title =~ s/^/&nbsp;/g;
2477                         $title =~ s/$/&nbsp;/g;
2478                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2479                 }
2480         } else {
2481                 $cloud = \%ctags_lc;
2482         }
2483         $cloud;
2484 }
2485
2486 sub git_show_project_tagcloud {
2487         my ($cloud, $count) = @_;
2488         print STDERR ref($cloud)."..\n";
2489         if (ref $cloud eq 'HTML::TagCloud') {
2490                 return $cloud->html_and_css($count);
2491         } else {
2492                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2493                 return '<p align="center">' . join (', ', map {
2494                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2495                 } splice(@tags, 0, $count)) . '</p>';
2496         }
2497 }
2498
2499 sub git_get_project_url_list {
2500         my $path = shift;
2501
2502         $git_dir = "$projectroot/$path";
2503         open my $fd, '<', "$git_dir/cloneurl"
2504                 or return wantarray ?
2505                 @{ config_to_multi(git_get_project_config('url')) } :
2506                    config_to_multi(git_get_project_config('url'));
2507         my @git_project_url_list = map { chomp; $_ } <$fd>;
2508         close $fd;
2509
2510         return wantarray ? @git_project_url_list : \@git_project_url_list;
2511 }
2512
2513 sub git_get_projects_list {
2514         my ($filter) = @_;
2515         my @list;
2516
2517         $filter ||= '';
2518         $filter =~ s/\.git$//;
2519
2520         my $check_forks = gitweb_check_feature('forks');
2521
2522         if (-d $projects_list) {
2523                 # search in directory
2524                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2525                 # remove the trailing "/"
2526                 $dir =~ s!/+$!!;
2527                 my $pfxlen = length("$dir");
2528                 my $pfxdepth = ($dir =~ tr!/!!);
2529
2530                 File::Find::find({
2531                         follow_fast => 1, # follow symbolic links
2532                         follow_skip => 2, # ignore duplicates
2533                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2534                         wanted => sub {
2535                                 # skip project-list toplevel, if we get it.
2536                                 return if (m!^[/.]$!);
2537                                 # only directories can be git repositories
2538                                 return unless (-d $_);
2539                                 # don't traverse too deep (Find is super slow on os x)
2540                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2541                                         $File::Find::prune = 1;
2542                                         return;
2543                                 }
2544
2545                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2546                                 # we check related file in $projectroot
2547                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2548                                 if (check_export_ok("$projectroot/$path")) {
2549                                         push @list, { path => $path };
2550                                         $File::Find::prune = 1;
2551                                 }
2552                         },
2553                 }, "$dir");
2554
2555         } elsif (-f $projects_list) {
2556                 # read from file(url-encoded):
2557                 # 'git%2Fgit.git Linus+Torvalds'
2558                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2559                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2560                 my %paths;
2561                 open my $fd, '<', $projects_list or return;
2562         PROJECT:
2563                 while (my $line = <$fd>) {
2564                         chomp $line;
2565                         my ($path, $owner) = split ' ', $line;
2566                         $path = unescape($path);
2567                         $owner = unescape($owner);
2568                         if (!defined $path) {
2569                                 next;
2570                         }
2571                         if ($filter ne '') {
2572                                 # looking for forks;
2573                                 my $pfx = substr($path, 0, length($filter));
2574                                 if ($pfx ne $filter) {
2575                                         next PROJECT;
2576                                 }
2577                                 my $sfx = substr($path, length($filter));
2578                                 if ($sfx !~ /^\/.*\.git$/) {
2579                                         next PROJECT;
2580                                 }
2581                         } elsif ($check_forks) {
2582                         PATH:
2583                                 foreach my $filter (keys %paths) {
2584                                         # looking for forks;
2585                                         my $pfx = substr($path, 0, length($filter));
2586                                         if ($pfx ne $filter) {
2587                                                 next PATH;
2588                                         }
2589                                         my $sfx = substr($path, length($filter));
2590                                         if ($sfx !~ /^\/.*\.git$/) {
2591                                                 next PATH;
2592                                         }
2593                                         # is a fork, don't include it in
2594                                         # the list
2595                                         next PROJECT;
2596                                 }
2597                         }
2598                         if (check_export_ok("$projectroot/$path")) {
2599                                 my $pr = {
2600                                         path => $path,
2601                                         owner => to_utf8($owner),
2602                                 };
2603                                 push @list, $pr;
2604                                 (my $forks_path = $path) =~ s/\.git$//;
2605                                 $paths{$forks_path}++;
2606                         }
2607                 }
2608                 close $fd;
2609         }
2610         return @list;
2611 }
2612
2613 our $gitweb_project_owner = undef;
2614 sub git_get_project_list_from_file {
2615
2616         return if (defined $gitweb_project_owner);
2617
2618         $gitweb_project_owner = {};
2619         # read from file (url-encoded):
2620         # 'git%2Fgit.git Linus+Torvalds'
2621         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2622         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2623         if (-f $projects_list) {
2624                 open(my $fd, '<', $projects_list);
2625                 while (my $line = <$fd>) {
2626                         chomp $line;
2627                         my ($pr, $ow) = split ' ', $line;
2628                         $pr = unescape($pr);
2629                         $ow = unescape($ow);
2630                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2631                 }
2632                 close $fd;
2633         }
2634 }
2635
2636 sub git_get_project_owner {
2637         my $project = shift;
2638         my $owner;
2639
2640         return undef unless $project;
2641         $git_dir = "$projectroot/$project";
2642
2643         if (!defined $gitweb_project_owner) {
2644                 git_get_project_list_from_file();
2645         }
2646
2647         if (exists $gitweb_project_owner->{$project}) {
2648                 $owner = $gitweb_project_owner->{$project};
2649         }
2650         if (!defined $owner){
2651                 $owner = git_get_project_config('owner');
2652         }
2653         if (!defined $owner) {
2654                 $owner = get_file_owner("$git_dir");
2655         }
2656
2657         return $owner;
2658 }
2659
2660 sub git_get_last_activity {
2661         my ($path) = @_;
2662         my $fd;
2663
2664         $git_dir = "$projectroot/$path";
2665         open($fd, "-|", git_cmd(), 'for-each-ref',
2666              '--format=%(committer)',
2667              '--sort=-committerdate',
2668              '--count=1',
2669              'refs/heads') or return;
2670         my $most_recent = <$fd>;
2671         close $fd or return;
2672         if (defined $most_recent &&
2673             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2674                 my $timestamp = $1;
2675                 my $age = time - $timestamp;
2676                 return ($age, age_string($age));
2677         }
2678         return (undef, undef);
2679 }
2680
2681 sub git_get_references {
2682         my $type = shift || "";
2683         my %refs;
2684         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2685         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2686         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2687                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2688                 or return;
2689
2690         while (my $line = <$fd>) {
2691                 chomp $line;
2692                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2693                         if (defined $refs{$1}) {
2694                                 push @{$refs{$1}}, $2;
2695                         } else {
2696                                 $refs{$1} = [ $2 ];
2697                         }
2698                 }
2699         }
2700         close $fd or return;
2701         return \%refs;
2702 }
2703
2704 sub git_get_rev_name_tags {
2705         my $hash = shift || return undef;
2706
2707         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2708                 or return;
2709         my $name_rev = <$fd>;
2710         close $fd;
2711
2712         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2713                 return $1;
2714         } else {
2715                 # catches also '$hash undefined' output
2716                 return undef;
2717         }
2718 }
2719
2720 ## ----------------------------------------------------------------------
2721 ## parse to hash functions
2722
2723 sub parse_date {
2724         my $epoch = shift;
2725         my $tz = shift || "-0000";
2726
2727         my %date;
2728         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2729         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2730         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2731         $date{'hour'} = $hour;
2732         $date{'minute'} = $min;
2733         $date{'mday'} = $mday;
2734         $date{'day'} = $days[$wday];
2735         $date{'month'} = $months[$mon];
2736         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2737                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2738         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2739                              $mday, $months[$mon], $hour ,$min;
2740         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2741                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2742
2743         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2744         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2745         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2746         $date{'hour_local'} = $hour;
2747         $date{'minute_local'} = $min;
2748         $date{'tz_local'} = $tz;
2749         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2750                                   1900+$year, $mon+1, $mday,
2751                                   $hour, $min, $sec, $tz);
2752         return %date;
2753 }
2754
2755 sub parse_tag {
2756         my $tag_id = shift;
2757         my %tag;
2758         my @comment;
2759
2760         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2761         $tag{'id'} = $tag_id;
2762         while (my $line = <$fd>) {
2763                 chomp $line;
2764                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2765                         $tag{'object'} = $1;
2766                 } elsif ($line =~ m/^type (.+)$/) {
2767                         $tag{'type'} = $1;
2768                 } elsif ($line =~ m/^tag (.+)$/) {
2769                         $tag{'name'} = $1;
2770                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2771                         $tag{'author'} = $1;
2772                         $tag{'author_epoch'} = $2;
2773                         $tag{'author_tz'} = $3;
2774                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2775                                 $tag{'author_name'}  = $1;
2776                                 $tag{'author_email'} = $2;
2777                         } else {
2778                                 $tag{'author_name'} = $tag{'author'};
2779                         }
2780                 } elsif ($line =~ m/--BEGIN/) {
2781                         push @comment, $line;
2782                         last;
2783                 } elsif ($line eq "") {
2784                         last;
2785                 }
2786         }
2787         push @comment, <$fd>;
2788         $tag{'comment'} = \@comment;
2789         close $fd or return;
2790         if (!defined $tag{'name'}) {
2791                 return
2792         };
2793         return %tag
2794 }
2795
2796 sub parse_commit_text {
2797         my ($commit_text, $withparents) = @_;
2798         my @commit_lines = split '\n', $commit_text;
2799         my %co;
2800
2801         pop @commit_lines; # Remove '\0'
2802
2803         if (! @commit_lines) {
2804                 return;
2805         }
2806
2807         my $header = shift @commit_lines;
2808         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2809                 return;
2810         }
2811         ($co{'id'}, my @parents) = split ' ', $header;
2812         while (my $line = shift @commit_lines) {
2813                 last if $line eq "\n";
2814                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2815                         $co{'tree'} = $1;
2816                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2817                         push @parents, $1;
2818                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2819                         $co{'author'} = to_utf8($1);
2820                         $co{'author_epoch'} = $2;
2821                         $co{'author_tz'} = $3;
2822                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2823                                 $co{'author_name'}  = $1;
2824                                 $co{'author_email'} = $2;
2825                         } else {
2826                                 $co{'author_name'} = $co{'author'};
2827                         }
2828                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2829                         $co{'committer'} = to_utf8($1);
2830                         $co{'committer_epoch'} = $2;
2831                         $co{'committer_tz'} = $3;
2832                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2833                                 $co{'committer_name'}  = $1;
2834                                 $co{'committer_email'} = $2;
2835                         } else {
2836                                 $co{'committer_name'} = $co{'committer'};
2837                         }
2838                 }
2839         }
2840         if (!defined $co{'tree'}) {
2841                 return;
2842         };
2843         $co{'parents'} = \@parents;
2844         $co{'parent'} = $parents[0];
2845
2846         foreach my $title (@commit_lines) {
2847                 $title =~ s/^    //;
2848                 if ($title ne "") {
2849                         $co{'title'} = chop_str($title, 80, 5);
2850                         # remove leading stuff of merges to make the interesting part visible
2851                         if (length($title) > 50) {
2852                                 $title =~ s/^Automatic //;
2853                                 $title =~ s/^merge (of|with) /Merge ... /i;
2854                                 if (length($title) > 50) {
2855                                         $title =~ s/(http|rsync):\/\///;
2856                                 }
2857                                 if (length($title) > 50) {
2858                                         $title =~ s/(master|www|rsync)\.//;
2859                                 }
2860                                 if (length($title) > 50) {
2861                                         $title =~ s/kernel.org:?//;
2862                                 }
2863                                 if (length($title) > 50) {
2864                                         $title =~ s/\/pub\/scm//;
2865                                 }
2866                         }
2867                         $co{'title_short'} = chop_str($title, 50, 5);
2868                         last;
2869                 }
2870         }
2871         if (! defined $co{'title'} || $co{'title'} eq "") {
2872                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2873         }
2874         # remove added spaces
2875         foreach my $line (@commit_lines) {
2876                 $line =~ s/^    //;
2877         }
2878         $co{'comment'} = \@commit_lines;
2879
2880         my $age = time - $co{'committer_epoch'};
2881         $co{'age'} = $age;
2882         $co{'age_string'} = age_string($age);
2883         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2884         if ($age > 60*60*24*7*2) {
2885                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2886                 $co{'age_string_age'} = $co{'age_string'};
2887         } else {
2888                 $co{'age_string_date'} = $co{'age_string'};
2889                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2890         }
2891         return %co;
2892 }
2893
2894 sub parse_commit {
2895         my ($commit_id) = @_;
2896         my %co;
2897
2898         local $/ = "\0";
2899
2900         open my $fd, "-|", git_cmd(), "rev-list",
2901                 "--parents",
2902                 "--header",
2903                 "--max-count=1",
2904                 $commit_id,
2905                 "--",
2906                 or die_error(500, "Open git-rev-list failed");
2907         %co = parse_commit_text(<$fd>, 1);
2908         close $fd;
2909
2910         return %co;
2911 }
2912
2913 sub parse_commits {
2914         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2915         my @cos;
2916
2917         $maxcount ||= 1;
2918         $skip ||= 0;
2919
2920         local $/ = "\0";
2921
2922         open my $fd, "-|", git_cmd(), "rev-list",
2923                 "--header",
2924                 @args,
2925                 ("--max-count=" . $maxcount),
2926                 ("--skip=" . $skip),
2927                 @extra_options,
2928                 $commit_id,
2929                 "--",
2930                 ($filename ? ($filename) : ())
2931                 or die_error(500, "Open git-rev-list failed");
2932         while (my $line = <$fd>) {
2933                 my %co = parse_commit_text($line);
2934                 push @cos, \%co;
2935         }
2936         close $fd;
2937
2938         return wantarray ? @cos : \@cos;
2939 }
2940
2941 # parse line of git-diff-tree "raw" output
2942 sub parse_difftree_raw_line {
2943         my $line = shift;
2944         my %res;
2945
2946         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2947         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2948         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2949                 $res{'from_mode'} = $1;
2950                 $res{'to_mode'} = $2;
2951                 $res{'from_id'} = $3;
2952                 $res{'to_id'} = $4;
2953                 $res{'status'} = $5;
2954                 $res{'similarity'} = $6;
2955                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2956                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2957                 } else {
2958                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2959                 }
2960         }
2961         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2962         # combined diff (for merge commit)
2963         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2964                 $res{'nparents'}  = length($1);
2965                 $res{'from_mode'} = [ split(' ', $2) ];
2966                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2967                 $res{'from_id'} = [ split(' ', $3) ];
2968                 $res{'to_id'} = pop @{$res{'from_id'}};
2969                 $res{'status'} = [ split('', $4) ];
2970                 $res{'to_file'} = unquote($5);
2971         }
2972         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2973         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2974                 $res{'commit'} = $1;
2975         }
2976
2977         return wantarray ? %res : \%res;
2978 }
2979
2980 # wrapper: return parsed line of git-diff-tree "raw" output
2981 # (the argument might be raw line, or parsed info)
2982 sub parsed_difftree_line {
2983         my $line_or_ref = shift;
2984
2985         if (ref($line_or_ref) eq "HASH") {
2986                 # pre-parsed (or generated by hand)
2987                 return $line_or_ref;
2988         } else {
2989                 return parse_difftree_raw_line($line_or_ref);
2990         }
2991 }
2992
2993 # parse line of git-ls-tree output
2994 sub parse_ls_tree_line {
2995         my $line = shift;
2996         my %opts = @_;
2997         my %res;
2998
2999         if ($opts{'-l'}) {
3000                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3001                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3002
3003                 $res{'mode'} = $1;
3004                 $res{'type'} = $2;
3005                 $res{'hash'} = $3;
3006                 $res{'size'} = $4;
3007                 if ($opts{'-z'}) {
3008                         $res{'name'} = $5;
3009                 } else {
3010                         $res{'name'} = unquote($5);
3011                 }
3012         } else {
3013                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3014                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3015
3016                 $res{'mode'} = $1;
3017                 $res{'type'} = $2;
3018                 $res{'hash'} = $3;
3019                 if ($opts{'-z'}) {
3020                         $res{'name'} = $4;
3021                 } else {
3022                         $res{'name'} = unquote($4);
3023                 }
3024         }
3025
3026         return wantarray ? %res : \%res;
3027 }
3028
3029 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3030 sub parse_from_to_diffinfo {
3031         my ($diffinfo, $from, $to, @parents) = @_;
3032
3033         if ($diffinfo->{'nparents'}) {
3034                 # combined diff
3035                 $from->{'file'} = [];
3036                 $from->{'href'} = [];
3037                 fill_from_file_info($diffinfo, @parents)
3038                         unless exists $diffinfo->{'from_file'};
3039                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3040                         $from->{'file'}[$i] =
3041                                 defined $diffinfo->{'from_file'}[$i] ?
3042                                         $diffinfo->{'from_file'}[$i] :
3043                                         $diffinfo->{'to_file'};
3044                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3045                                 $from->{'href'}[$i] = href(action=>"blob",
3046                                                            hash_base=>$parents[$i],
3047                                                            hash=>$diffinfo->{'from_id'}[$i],
3048                                                            file_name=>$from->{'file'}[$i]);
3049                         } else {
3050                                 $from->{'href'}[$i] = undef;
3051                         }
3052                 }
3053         } else {
3054                 # ordinary (not combined) diff
3055                 $from->{'file'} = $diffinfo->{'from_file'};
3056                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3057                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3058                                                hash=>$diffinfo->{'from_id'},
3059                                                file_name=>$from->{'file'});
3060                 } else {
3061                         delete $from->{'href'};
3062                 }
3063         }
3064
3065         $to->{'file'} = $diffinfo->{'to_file'};
3066         if (!is_deleted($diffinfo)) { # file exists in result
3067                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3068                                      hash=>$diffinfo->{'to_id'},
3069                                      file_name=>$to->{'file'});
3070         } else {
3071                 delete $to->{'href'};
3072         }
3073 }
3074
3075 ## ......................................................................
3076 ## parse to array of hashes functions
3077
3078 sub git_get_heads_list {
3079         my $limit = shift;
3080         my @headslist;
3081
3082         open my $fd, '-|', git_cmd(), 'for-each-ref',
3083                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3084                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3085                 'refs/heads'
3086                 or return;
3087         while (my $line = <$fd>) {
3088                 my %ref_item;
3089
3090                 chomp $line;
3091                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3092                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3093                 my ($committer, $epoch, $tz) =
3094                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3095                 $ref_item{'fullname'}  = $name;
3096                 $name =~ s!^refs/heads/!!;
3097
3098                 $ref_item{'name'}  = $name;
3099                 $ref_item{'id'}    = $hash;
3100                 $ref_item{'title'} = $title || '(no commit message)';
3101                 $ref_item{'epoch'} = $epoch;
3102                 if ($epoch) {
3103                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3104                 } else {
3105                         $ref_item{'age'} = "unknown";
3106                 }
3107
3108                 push @headslist, \%ref_item;
3109         }
3110         close $fd;
3111
3112         return wantarray ? @headslist : \@headslist;
3113 }
3114
3115 sub git_get_tags_list {
3116         my $limit = shift;
3117         my @tagslist;
3118
3119         open my $fd, '-|', git_cmd(), 'for-each-ref',
3120                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3121                 '--format=%(objectname) %(objecttype) %(refname) '.
3122                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3123                 'refs/tags'
3124                 or return;
3125         while (my $line = <$fd>) {
3126                 my %ref_item;
3127
3128                 chomp $line;
3129                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3130                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3131                 my ($creator, $epoch, $tz) =
3132                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3133                 $ref_item{'fullname'} = $name;
3134                 $name =~ s!^refs/tags/!!;
3135
3136                 $ref_item{'type'} = $type;
3137                 $ref_item{'id'} = $id;
3138                 $ref_item{'name'} = $name;
3139                 if ($type eq "tag") {
3140                         $ref_item{'subject'} = $title;
3141                         $ref_item{'reftype'} = $reftype;
3142                         $ref_item{'refid'}   = $refid;
3143                 } else {
3144                         $ref_item{'reftype'} = $type;
3145                         $ref_item{'refid'}   = $id;
3146                 }
3147
3148                 if ($type eq "tag" || $type eq "commit") {
3149                         $ref_item{'epoch'} = $epoch;
3150                         if ($epoch) {
3151                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3152                         } else {
3153                                 $ref_item{'age'} = "unknown";
3154                         }
3155                 }
3156
3157                 push @tagslist, \%ref_item;
3158         }
3159         close $fd;
3160
3161         return wantarray ? @tagslist : \@tagslist;
3162 }
3163
3164 ## ----------------------------------------------------------------------
3165 ## filesystem-related functions
3166
3167 sub get_file_owner {
3168         my $path = shift;
3169
3170         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3171         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3172         if (!defined $gcos) {
3173                 return undef;
3174         }
3175         my $owner = $gcos;
3176         $owner =~ s/[,;].*$//;
3177         return to_utf8($owner);
3178 }
3179
3180 # assume that file exists
3181 sub insert_file {
3182         my $filename = shift;
3183
3184         open my $fd, '<', $filename;
3185         print map { to_utf8($_) } <$fd>;
3186         close $fd;
3187 }
3188
3189 ## ......................................................................
3190 ## mimetype related functions
3191
3192 sub mimetype_guess_file {
3193         my $filename = shift;
3194         my $mimemap = shift;
3195         -r $mimemap or return undef;
3196
3197         my %mimemap;
3198         open(my $mh, '<', $mimemap) or return undef;
3199         while (<$mh>) {
3200                 next if m/^#/; # skip comments
3201                 my ($mimetype, $exts) = split(/\t+/);
3202                 if (defined $exts) {
3203                         my @exts = split(/\s+/, $exts);
3204                         foreach my $ext (@exts) {
3205                                 $mimemap{$ext} = $mimetype;
3206                         }
3207                 }
3208         }
3209         close($mh);
3210
3211         $filename =~ /\.([^.]*)$/;
3212         return $mimemap{$1};
3213 }
3214
3215 sub mimetype_guess {
3216         my $filename = shift;
3217         my $mime;
3218         $filename =~ /\./ or return undef;
3219
3220         if ($mimetypes_file) {
3221                 my $file = $mimetypes_file;
3222                 if ($file !~ m!^/!) { # if it is relative path
3223                         # it is relative to project
3224                         $file = "$projectroot/$project/$file";
3225                 }
3226                 $mime = mimetype_guess_file($filename, $file);
3227         }
3228         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3229         return $mime;
3230 }
3231
3232 sub blob_mimetype {
3233         my $fd = shift;
3234         my $filename = shift;
3235
3236         if ($filename) {
3237                 my $mime = mimetype_guess($filename);
3238                 $mime and return $mime;
3239         }
3240
3241         # just in case
3242         return $default_blob_plain_mimetype unless $fd;
3243
3244         if (-T $fd) {
3245                 return 'text/plain';
3246         } elsif (! $filename) {
3247                 return 'application/octet-stream';
3248         } elsif ($filename =~ m/\.png$/i) {
3249                 return 'image/png';
3250         } elsif ($filename =~ m/\.gif$/i) {
3251                 return 'image/gif';
3252         } elsif ($filename =~ m/\.jpe?g$/i) {
3253                 return 'image/jpeg';
3254         } else {
3255                 return 'application/octet-stream';
3256         }
3257 }
3258
3259 sub blob_contenttype {
3260         my ($fd, $file_name, $type) = @_;
3261
3262         $type ||= blob_mimetype($fd, $file_name);
3263         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3264                 $type .= "; charset=$default_text_plain_charset";
3265         }
3266
3267         return $type;
3268 }
3269
3270 ## ======================================================================
3271 ## functions printing HTML: header, footer, error page
3272
3273 sub git_header_html {
3274         my $status = shift || "200 OK";
3275         my $expires = shift;
3276
3277         my $title = "$site_name";
3278         if (defined $project) {
3279                 $title .= " - " . to_utf8($project);
3280                 if (defined $action) {
3281                         $title .= "/$action";
3282                         if (defined $file_name) {
3283                                 $title .= " - " . esc_path($file_name);
3284                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3285                                         $title .= "/";
3286                                 }
3287                         }
3288                 }
3289         }
3290         my $content_type;
3291         # require explicit support from the UA if we are to send the page as
3292         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3293         # we have to do this because MSIE sometimes globs '*/*', pretending to
3294         # support xhtml+xml but choking when it gets what it asked for.
3295         if (defined $cgi->http('HTTP_ACCEPT') &&
3296             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3297             $cgi->Accept('application/xhtml+xml') != 0) {
3298                 $content_type = 'application/xhtml+xml';
3299         } else {
3300                 $content_type = 'text/html';
3301         }
3302         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3303                            -status=> $status, -expires => $expires);
3304         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3305         print <<EOF;
3306 <?xml version="1.0" encoding="utf-8"?>
3307 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3308 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3309 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3310 <!-- git core binaries version $git_version -->
3311 <head>
3312 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3313 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3314 <meta name="robots" content="index, nofollow"/>
3315 <title>$title</title>
3316 EOF
3317         # the stylesheet, favicon etc urls won't work correctly with path_info
3318         # unless we set the appropriate base URL
3319         if ($ENV{'PATH_INFO'}) {
3320                 print "<base href=\"".esc_url($base_url)."\" />\n";
3321         }
3322         # print out each stylesheet that exist, providing backwards capability
3323         # for those people who defined $stylesheet in a config file
3324         if (defined $stylesheet) {
3325                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3326         } else {
3327                 foreach my $stylesheet (@stylesheets) {
3328                         next unless $stylesheet;
3329                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3330                 }
3331         }
3332         if (defined $project) {
3333                 my %href_params = get_feed_info();
3334                 if (!exists $href_params{'-title'}) {
3335                         $href_params{'-title'} = 'log';
3336                 }
3337
3338                 foreach my $format qw(RSS Atom) {
3339                         my $type = lc($format);
3340                         my %link_attr = (
3341                                 '-rel' => 'alternate',
3342                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3343                                 '-type' => "application/$type+xml"
3344                         );
3345
3346                         $href_params{'action'} = $type;
3347                         $link_attr{'-href'} = href(%href_params);
3348                         print "<link ".
3349                               "rel=\"$link_attr{'-rel'}\" ".
3350                               "title=\"$link_attr{'-title'}\" ".
3351                               "href=\"$link_attr{'-href'}\" ".
3352                               "type=\"$link_attr{'-type'}\" ".
3353                               "/>\n";
3354
3355                         $href_params{'extra_options'} = '--no-merges';
3356                         $link_attr{'-href'} = href(%href_params);
3357                         $link_attr{'-title'} .= ' (no merges)';
3358                         print "<link ".
3359                               "rel=\"$link_attr{'-rel'}\" ".
3360                               "title=\"$link_attr{'-title'}\" ".
3361                               "href=\"$link_attr{'-href'}\" ".
3362                               "type=\"$link_attr{'-type'}\" ".
3363                               "/>\n";
3364                 }
3365
3366         } else {
3367                 printf('<link rel="alternate" title="%s projects list" '.
3368                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3369                        $site_name, href(project=>undef, action=>"project_index"));
3370                 printf('<link rel="alternate" title="%s projects feeds" '.
3371                        'href="%s" type="text/x-opml" />'."\n",
3372                        $site_name, href(project=>undef, action=>"opml"));
3373         }
3374         if (defined $favicon) {
3375                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3376         }
3377
3378         print "</head>\n" .
3379               "<body>\n";
3380
3381         if (defined $site_header && -f $site_header) {
3382                 insert_file($site_header);
3383         }
3384
3385         print "<div class=\"page_header\">\n" .
3386               $cgi->a({-href => esc_url($logo_url),
3387                        -title => $logo_label},
3388                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3389         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3390         if (defined $project) {
3391                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3392                 if (defined $action) {
3393                         print " / $action";
3394                 }
3395                 print "\n";
3396         }
3397         print "</div>\n";
3398
3399         my $have_search = gitweb_check_feature('search');
3400         if (defined $project && $have_search) {
3401                 if (!defined $searchtext) {
3402                         $searchtext = "";
3403                 }
3404                 my $search_hash;
3405                 if (defined $hash_base) {
3406                         $search_hash = $hash_base;
3407                 } elsif (defined $hash) {
3408                         $search_hash = $hash;
3409                 } else {
3410                         $search_hash = "HEAD";
3411                 }
3412                 my $action = $my_uri;
3413                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3414                 if ($use_pathinfo) {
3415                         $action .= "/".esc_url($project);
3416                 }
3417                 print $cgi->startform(-method => "get", -action => $action) .
3418                       "<div class=\"search\">\n" .
3419                       (!$use_pathinfo &&
3420                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3421                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3422                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3423                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3424                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3425                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3426                       " search:\n",
3427                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3428                       "<span title=\"Extended regular expression\">" .
3429                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3430                                      -checked => $search_use_regexp) .
3431                       "</span>" .
3432                       "</div>" .
3433                       $cgi->end_form() . "\n";
3434         }
3435 }
3436
3437 sub git_footer_html {
3438         my $feed_class = 'rss_logo';
3439
3440         print "<div class=\"page_footer\">\n";
3441         if (defined $project) {
3442                 my $descr = git_get_project_description($project);
3443                 if (defined $descr) {
3444                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3445                 }
3446
3447                 my %href_params = get_feed_info();
3448                 if (!%href_params) {
3449                         $feed_class .= ' generic';
3450                 }
3451                 $href_params{'-title'} ||= 'log';
3452
3453                 foreach my $format qw(RSS Atom) {
3454                         $href_params{'action'} = lc($format);
3455                         print $cgi->a({-href => href(%href_params),
3456                                       -title => "$href_params{'-title'} $format feed",
3457                                       -class => $feed_class}, $format)."\n";
3458                 }
3459
3460         } else {
3461                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3462                               -class => $feed_class}, "OPML") . " ";
3463                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3464                               -class => $feed_class}, "TXT") . "\n";
3465         }
3466         print "</div>\n"; # class="page_footer"
3467
3468         if (defined $t0 && gitweb_check_feature('timed')) {
3469                 print "<div id=\"generating_info\">\n";
3470                 print 'This page took '.
3471                       '<span id="generating_time" class="time_span">'.
3472                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3473                       ' seconds </span>'.
3474                       ' and '.
3475                       '<span id="generating_cmd">'.
3476                       $number_of_git_cmds.
3477                       '</span> git commands '.
3478                       " to generate.\n";
3479                 print "</div>\n"; # class="page_footer"
3480         }
3481
3482         if (defined $site_footer && -f $site_footer) {
3483                 insert_file($site_footer);
3484         }
3485
3486         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3487         if (defined $action &&
3488             $action eq 'blame_incremental') {
3489                 print qq!<script type="text/javascript">\n!.
3490                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3491                       qq!           "!. href() .qq!");\n!.
3492                       qq!</script>\n!;
3493         } elsif (gitweb_check_feature('javascript-actions')) {
3494                 print qq!<script type="text/javascript">\n!.
3495                       qq!window.onload = fixLinks;\n!.
3496                       qq!</script>\n!;
3497         }
3498
3499         print "</body>\n" .
3500               "</html>";
3501 }
3502
3503 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3504 # Example: die_error(404, 'Hash not found')
3505 # By convention, use the following status codes (as defined in RFC 2616):
3506 # 400: Invalid or missing CGI parameters, or
3507 #      requested object exists but has wrong type.
3508 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3509 #      this server or project.
3510 # 404: Requested object/revision/project doesn't exist.
3511 # 500: The server isn't configured properly, or
3512 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3513 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3514 # 503: The server is currently unavailable (because it is overloaded,
3515 #      or down for maintenance).  Generally, this is a temporary state.
3516 sub die_error {
3517         my $status = shift || 500;
3518         my $error = esc_html(shift) || "Internal Server Error";
3519         my $extra = shift;
3520
3521         my %http_responses = (
3522                 400 => '400 Bad Request',
3523                 403 => '403 Forbidden',
3524                 404 => '404 Not Found',
3525                 500 => '500 Internal Server Error',
3526                 503 => '503 Service Unavailable',
3527         );
3528         git_header_html($http_responses{$status});
3529         print <<EOF;
3530 <div class="page_body">
3531 <br /><br />
3532 $status - $error
3533 <br />
3534 EOF
3535         if (defined $extra) {
3536                 print "<hr />\n" .
3537                       "$extra\n";
3538         }
3539         print "</div>\n";
3540
3541         git_footer_html();
3542         goto DONE_GITWEB;
3543 }
3544
3545 ## ----------------------------------------------------------------------
3546 ## functions printing or outputting HTML: navigation
3547
3548 sub git_print_page_nav {
3549         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3550         $extra = '' if !defined $extra; # pager or formats
3551
3552         my @navs = qw(summary shortlog log commit commitdiff tree);
3553         if ($suppress) {
3554                 @navs = grep { $_ ne $suppress } @navs;
3555         }
3556
3557         my %arg = map { $_ => {action=>$_} } @navs;
3558         if (defined $head) {
3559                 for (qw(commit commitdiff)) {
3560                         $arg{$_}{'hash'} = $head;
3561                 }
3562                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3563                         for (qw(shortlog log)) {
3564                                 $arg{$_}{'hash'} = $head;
3565                         }
3566                 }
3567         }
3568
3569         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3570         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3571
3572         my @actions = gitweb_get_feature('actions');
3573         my %repl = (
3574                 '%' => '%',
3575                 'n' => $project,         # project name
3576                 'f' => $git_dir,         # project path within filesystem
3577                 'h' => $treehead || '',  # current hash ('h' parameter)
3578                 'b' => $treebase || '',  # hash base ('hb' parameter)
3579         );
3580         while (@actions) {
3581                 my ($label, $link, $pos) = splice(@actions,0,3);
3582                 # insert
3583                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3584                 # munch munch
3585                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3586                 $arg{$label}{'_href'} = $link;
3587         }
3588
3589         print "<div class=\"page_nav\">\n" .
3590                 (join " | ",
3591                  map { $_ eq $current ?
3592                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3593                  } @navs);
3594         print "<br/>\n$extra<br/>\n" .
3595               "</div>\n";
3596 }
3597
3598 sub format_paging_nav {
3599         my ($action, $page, $has_next_link) = @_;
3600         my $paging_nav;
3601
3602
3603         if ($page > 0) {
3604                 $paging_nav .=
3605                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3606                         " &sdot; " .
3607                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3608                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3609         } else {
3610                 $paging_nav .= "first &sdot; prev";
3611         }
3612
3613         if ($has_next_link) {
3614                 $paging_nav .= " &sdot; " .
3615                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3616                                  -accesskey => "n", -title => "Alt-n"}, "next");
3617         } else {
3618                 $paging_nav .= " &sdot; next";
3619         }
3620
3621         return $paging_nav;
3622 }
3623
3624 ## ......................................................................
3625 ## functions printing or outputting HTML: div
3626
3627 sub git_print_header_div {
3628         my ($action, $title, $hash, $hash_base) = @_;
3629         my %args = ();
3630
3631         $args{'action'} = $action;
3632         $args{'hash'} = $hash if $hash;
3633         $args{'hash_base'} = $hash_base if $hash_base;
3634
3635         print "<div class=\"header\">\n" .
3636               $cgi->a({-href => href(%args), -class => "title"},
3637               $title ? $title : $action) .
3638               "\n</div>\n";
3639 }
3640
3641 sub print_local_time {
3642         print format_local_time(@_);
3643 }
3644
3645 sub format_local_time {
3646         my $localtime = '';
3647         my %date = @_;
3648         if ($date{'hour_local'} < 6) {
3649                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3650                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3651         } else {
3652                 $localtime .= sprintf(" (%02d:%02d %s)",
3653                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3654         }
3655
3656         return $localtime;
3657 }
3658
3659 # Outputs the author name and date in long form
3660 sub git_print_authorship {
3661         my $co = shift;
3662         my %opts = @_;
3663         my $tag = $opts{-tag} || 'div';
3664         my $author = $co->{'author_name'};
3665
3666         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3667         print "<$tag class=\"author_date\">" .
3668               format_search_author($author, "author", esc_html($author)) .
3669               " [$ad{'rfc2822'}";
3670         print_local_time(%ad) if ($opts{-localtime});
3671         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3672                   . "</$tag>\n";
3673 }
3674
3675 # Outputs table rows containing the full author or committer information,
3676 # in the format expected for 'commit' view (& similia).
3677 # Parameters are a commit hash reference, followed by the list of people
3678 # to output information for. If the list is empty it defalts to both
3679 # author and committer.
3680 sub git_print_authorship_rows {
3681         my $co = shift;
3682         # too bad we can't use @people = @_ || ('author', 'committer')
3683         my @people = @_;
3684         @people = ('author', 'committer') unless @people;
3685         foreach my $who (@people) {
3686                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3687                 print "<tr><td>$who</td><td>" .
3688                       format_search_author($co->{"${who}_name"}, $who,
3689                                esc_html($co->{"${who}_name"})) . " " .
3690                       format_search_author($co->{"${who}_email"}, $who,
3691                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3692                       "</td><td rowspan=\"2\">" .
3693                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3694                       "</td></tr>\n" .
3695                       "<tr>" .
3696                       "<td></td><td> $wd{'rfc2822'}";
3697                 print_local_time(%wd);
3698                 print "</td>" .
3699                       "</tr>\n";
3700         }
3701 }
3702
3703 sub git_print_page_path {
3704         my $name = shift;
3705         my $type = shift;
3706         my $hb = shift;
3707
3708
3709         print "<div class=\"page_path\">";
3710         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3711                       -title => 'tree root'}, to_utf8("[$project]"));
3712         print " / ";
3713         if (defined $name) {
3714                 my @dirname = split '/', $name;
3715                 my $basename = pop @dirname;
3716                 my $fullname = '';
3717
3718                 foreach my $dir (@dirname) {
3719                         $fullname .= ($fullname ? '/' : '') . $dir;
3720                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3721                                                      hash_base=>$hb),
3722                                       -title => $fullname}, esc_path($dir));
3723                         print " / ";
3724                 }
3725                 if (defined $type && $type eq 'blob') {
3726                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3727                                                      hash_base=>$hb),
3728                                       -title => $name}, esc_path($basename));
3729                 } elsif (defined $type && $type eq 'tree') {
3730                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3731                                                      hash_base=>$hb),
3732                                       -title => $name}, esc_path($basename));
3733                         print " / ";
3734                 } else {
3735                         print esc_path($basename);
3736                 }
3737         }
3738         print "<br/></div>\n";
3739 }
3740
3741 sub git_print_log {
3742         my $log = shift;
3743         my %opts = @_;
3744
3745         if ($opts{'-remove_title'}) {
3746                 # remove title, i.e. first line of log
3747                 shift @$log;
3748         }
3749         # remove leading empty lines
3750         while (defined $log->[0] && $log->[0] eq "") {
3751                 shift @$log;
3752         }
3753
3754         # print log
3755         my $signoff = 0;
3756         my $empty = 0;
3757         foreach my $line (@$log) {
3758                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3759                         $signoff = 1;
3760                         $empty = 0;
3761                         if (! $opts{'-remove_signoff'}) {
3762                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3763                                 next;
3764                         } else {
3765                                 # remove signoff lines
3766                                 next;
3767                         }
3768                 } else {
3769                         $signoff = 0;
3770                 }
3771
3772                 # print only one empty line
3773                 # do not print empty line after signoff
3774                 if ($line eq "") {
3775                         next if ($empty || $signoff);
3776                         $empty = 1;
3777                 } else {
3778                         $empty = 0;
3779                 }
3780
3781                 print format_log_line_html($line) . "<br/>\n";
3782         }
3783
3784         if ($opts{'-final_empty_line'}) {
3785                 # end with single empty line
3786                 print "<br/>\n" unless $empty;
3787         }
3788 }
3789
3790 # return link target (what link points to)
3791 sub git_get_link_target {
3792         my $hash = shift;
3793         my $link_target;
3794
3795         # read link
3796         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3797                 or return;
3798         {
3799                 local $/ = undef;
3800                 $link_target = <$fd>;
3801         }
3802         close $fd
3803                 or return;
3804
3805         return $link_target;
3806 }
3807
3808 # given link target, and the directory (basedir) the link is in,
3809 # return target of link relative to top directory (top tree);
3810 # return undef if it is not possible (including absolute links).
3811 sub normalize_link_target {
3812         my ($link_target, $basedir) = @_;
3813
3814         # absolute symlinks (beginning with '/') cannot be normalized
3815         return if (substr($link_target, 0, 1) eq '/');
3816
3817         # normalize link target to path from top (root) tree (dir)
3818         my $path;
3819         if ($basedir) {
3820                 $path = $basedir . '/' . $link_target;
3821         } else {
3822                 # we are in top (root) tree (dir)
3823                 $path = $link_target;
3824         }
3825
3826         # remove //, /./, and /../
3827         my @path_parts;
3828         foreach my $part (split('/', $path)) {
3829                 # discard '.' and ''
3830                 next if (!$part || $part eq '.');
3831                 # handle '..'
3832                 if ($part eq '..') {
3833                         if (@path_parts) {
3834                                 pop @path_parts;
3835                         } else {
3836                                 # link leads outside repository (outside top dir)
3837                                 return;
3838                         }
3839                 } else {
3840                         push @path_parts, $part;
3841                 }
3842         }
3843         $path = join('/', @path_parts);
3844
3845         return $path;
3846 }
3847
3848 # print tree entry (row of git_tree), but without encompassing <tr> element
3849 sub git_print_tree_entry {
3850         my ($t, $basedir, $hash_base, $have_blame) = @_;
3851
3852         my %base_key = ();
3853         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3854
3855         # The format of a table row is: mode list link.  Where mode is
3856         # the mode of the entry, list is the name of the entry, an href,
3857         # and link is the action links of the entry.
3858
3859         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3860         if (exists $t->{'size'}) {
3861                 print "<td class=\"size\">$t->{'size'}</td>\n";
3862         }
3863         if ($t->{'type'} eq "blob") {
3864                 print "<td class=\"list\">" .
3865                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3866                                                file_name=>"$basedir$t->{'name'}", %base_key),
3867                                 -class => "list"}, esc_path($t->{'name'}));
3868                 if (S_ISLNK(oct $t->{'mode'})) {
3869                         my $link_target = git_get_link_target($t->{'hash'});
3870                         if ($link_target) {
3871                                 my $norm_target = normalize_link_target($link_target, $basedir);
3872                                 if (defined $norm_target) {
3873                                         print " -> " .
3874                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3875                                                                      file_name=>$norm_target),
3876                                                        -title => $norm_target}, esc_path($link_target));
3877                                 } else {
3878                                         print " -> " . esc_path($link_target);
3879                                 }
3880                         }
3881                 }
3882                 print "</td>\n";
3883                 print "<td class=\"link\">";
3884                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3885                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3886                               "blob");
3887                 if ($have_blame) {
3888                         print " | " .
3889                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3890                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3891                                       "blame");
3892                 }
3893                 if (defined $hash_base) {
3894                         print " | " .
3895                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3896                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3897                                       "history");
3898                 }
3899                 print " | " .
3900                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3901                                                file_name=>"$basedir$t->{'name'}")},
3902                                 "raw");
3903                 print "</td>\n";
3904
3905         } elsif ($t->{'type'} eq "tree") {
3906                 print "<td class=\"list\">";
3907                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3908                                              file_name=>"$basedir$t->{'name'}",
3909                                              %base_key)},
3910                               esc_path($t->{'name'}));
3911                 print "</td>\n";
3912                 print "<td class=\"link\">";
3913                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3914                                              file_name=>"$basedir$t->{'name'}",
3915                                              %base_key)},
3916                               "tree");
3917                 if (defined $hash_base) {
3918                         print " | " .
3919                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3920                                                      file_name=>"$basedir$t->{'name'}")},
3921                                       "history");
3922                 }
3923                 print "</td>\n";
3924         } else {
3925                 # unknown object: we can only present history for it
3926                 # (this includes 'commit' object, i.e. submodule support)
3927                 print "<td class=\"list\">" .
3928                       esc_path($t->{'name'}) .
3929                       "</td>\n";
3930                 print "<td class=\"link\">";
3931                 if (defined $hash_base) {
3932                         print $cgi->a({-href => href(action=>"history",
3933                                                      hash_base=>$hash_base,
3934                                                      file_name=>"$basedir$t->{'name'}")},
3935                                       "history");
3936                 }
3937                 print "</td>\n";
3938         }
3939 }
3940
3941 ## ......................................................................
3942 ## functions printing large fragments of HTML
3943
3944 # get pre-image filenames for merge (combined) diff
3945 sub fill_from_file_info {
3946         my ($diff, @parents) = @_;
3947
3948         $diff->{'from_file'} = [ ];
3949         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3950         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3951                 if ($diff->{'status'}[$i] eq 'R' ||
3952                     $diff->{'status'}[$i] eq 'C') {
3953                         $diff->{'from_file'}[$i] =
3954                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3955                 }
3956         }
3957
3958         return $diff;
3959 }
3960
3961 # is current raw difftree line of file deletion
3962 sub is_deleted {
3963         my $diffinfo = shift;
3964
3965         return $diffinfo->{'to_id'} eq ('0' x 40);
3966 }
3967
3968 # does patch correspond to [previous] difftree raw line
3969 # $diffinfo  - hashref of parsed raw diff format
3970 # $patchinfo - hashref of parsed patch diff format
3971 #              (the same keys as in $diffinfo)
3972 sub is_patch_split {
3973         my ($diffinfo, $patchinfo) = @_;
3974
3975         return defined $diffinfo && defined $patchinfo
3976                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3977 }
3978
3979
3980 sub git_difftree_body {
3981         my ($difftree, $hash, @parents) = @_;
3982         my ($parent) = $parents[0];
3983         my $have_blame = gitweb_check_feature('blame');
3984         print "<div class=\"list_head\">\n";
3985         if ($#{$difftree} > 10) {
3986                 print(($#{$difftree} + 1) . " files changed:\n");
3987         }
3988         print "</div>\n";
3989
3990         print "<table class=\"" .
3991               (@parents > 1 ? "combined " : "") .
3992               "diff_tree\">\n";
3993
3994         # header only for combined diff in 'commitdiff' view
3995         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3996         if ($has_header) {
3997                 # table header
3998                 print "<thead><tr>\n" .
3999                        "<th></th><th></th>\n"; # filename, patchN link
4000                 for (my $i = 0; $i < @parents; $i++) {
4001                         my $par = $parents[$i];
4002                         print "<th>" .
4003                               $cgi->a({-href => href(action=>"commitdiff",
4004                                                      hash=>$hash, hash_parent=>$par),
4005                                        -title => 'commitdiff to parent number ' .
4006                                                   ($i+1) . ': ' . substr($par,0,7)},
4007                                       $i+1) .
4008                               "&nbsp;</th>\n";
4009                 }
4010                 print "</tr></thead>\n<tbody>\n";
4011         }
4012
4013         my $alternate = 1;
4014         my $patchno = 0;
4015         foreach my $line (@{$difftree}) {
4016                 my $diff = parsed_difftree_line($line);
4017
4018                 if ($alternate) {
4019                         print "<tr class=\"dark\">\n";
4020                 } else {
4021                         print "<tr class=\"light\">\n";
4022                 }
4023                 $alternate ^= 1;
4024
4025                 if (exists $diff->{'nparents'}) { # combined diff
4026
4027                         fill_from_file_info($diff, @parents)
4028                                 unless exists $diff->{'from_file'};
4029
4030                         if (!is_deleted($diff)) {
4031                                 # file exists in the result (child) commit
4032                                 print "<td>" .
4033                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4034                                                              file_name=>$diff->{'to_file'},
4035                                                              hash_base=>$hash),
4036                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4037                                       "</td>\n";
4038                         } else {
4039                                 print "<td>" .
4040                                       esc_path($diff->{'to_file'}) .
4041                                       "</td>\n";
4042                         }
4043
4044                         if ($action eq 'commitdiff') {
4045                                 # link to patch
4046                                 $patchno++;
4047                                 print "<td class=\"link\">" .
4048                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4049                                       " | " .
4050                                       "</td>\n";
4051                         }
4052
4053                         my $has_history = 0;
4054                         my $not_deleted = 0;
4055                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4056                                 my $hash_parent = $parents[$i];
4057                                 my $from_hash = $diff->{'from_id'}[$i];
4058                                 my $from_path = $diff->{'from_file'}[$i];
4059                                 my $status = $diff->{'status'}[$i];
4060
4061                                 $has_history ||= ($status ne 'A');
4062                                 $not_deleted ||= ($status ne 'D');
4063
4064                                 if ($status eq 'A') {
4065                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4066                                 } elsif ($status eq 'D') {
4067                                         print "<td class=\"link\">" .
4068                                               $cgi->a({-href => href(action=>"blob",
4069                                                                      hash_base=>$hash,
4070                                                                      hash=>$from_hash,
4071                                                                      file_name=>$from_path)},
4072                                                       "blob" . ($i+1)) .
4073                                               " | </td>\n";
4074                                 } else {
4075                                         if ($diff->{'to_id'} eq $from_hash) {
4076                                                 print "<td class=\"link nochange\">";
4077                                         } else {
4078                                                 print "<td class=\"link\">";
4079                                         }
4080                                         print $cgi->a({-href => href(action=>"blobdiff",
4081                                                                      hash=>$diff->{'to_id'},
4082                                                                      hash_parent=>$from_hash,
4083                                                                      hash_base=>$hash,
4084                                                                      hash_parent_base=>$hash_parent,
4085                                                                      file_name=>$diff->{'to_file'},
4086                                                                      file_parent=>$from_path)},
4087                                                       "diff" . ($i+1)) .
4088                                               " | </td>\n";
4089                                 }
4090                         }
4091
4092                         print "<td class=\"link\">";
4093                         if ($not_deleted) {
4094                                 print $cgi->a({-href => href(action=>"blob",
4095                                                              hash=>$diff->{'to_id'},
4096                                                              file_name=>$diff->{'to_file'},
4097                                                              hash_base=>$hash)},
4098                                               "blob");
4099                                 print " | " if ($has_history);
4100                         }
4101                         if ($has_history) {
4102                                 print $cgi->a({-href => href(action=>"history",
4103                                                              file_name=>$diff->{'to_file'},
4104                                                              hash_base=>$hash)},
4105                                               "history");
4106                         }
4107                         print "</td>\n";
4108
4109                         print "</tr>\n";
4110                         next; # instead of 'else' clause, to avoid extra indent
4111                 }
4112                 # else ordinary diff
4113
4114                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4115                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4116                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4117                         $to_mode_oct = oct $diff->{'to_mode'};
4118                         if (S_ISREG($to_mode_oct)) { # only for regular file
4119                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4120                         }
4121                         $to_file_type = file_type($diff->{'to_mode'});
4122                 }
4123                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4124                         $from_mode_oct = oct $diff->{'from_mode'};
4125                         if (S_ISREG($to_mode_oct)) { # only for regular file
4126                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4127                         }
4128                         $from_file_type = file_type($diff->{'from_mode'});
4129                 }
4130
4131                 if ($diff->{'status'} eq "A") { # created
4132                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4133                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4134                         $mode_chng   .= "]</span>";
4135                         print "<td>";
4136                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4137                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4138                                       -class => "list"}, esc_path($diff->{'file'}));
4139                         print "</td>\n";
4140                         print "<td>$mode_chng</td>\n";
4141                         print "<td class=\"link\">";
4142                         if ($action eq 'commitdiff') {
4143                                 # link to patch
4144                                 $patchno++;
4145                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4146                                 print " | ";
4147                         }
4148                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4149                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4150                                       "blob");
4151                         print "</td>\n";
4152
4153                 } elsif ($diff->{'status'} eq "D") { # deleted
4154                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4155                         print "<td>";
4156                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4157                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4158                                        -class => "list"}, esc_path($diff->{'file'}));
4159                         print "</td>\n";
4160                         print "<td>$mode_chng</td>\n";
4161                         print "<td class=\"link\">";
4162                         if ($action eq 'commitdiff') {
4163                                 # link to patch
4164                                 $patchno++;
4165                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4166                                 print " | ";
4167                         }
4168                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4169                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4170                                       "blob") . " | ";
4171                         if ($have_blame) {
4172                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4173                                                              file_name=>$diff->{'file'})},
4174                                               "blame") . " | ";
4175                         }
4176                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4177                                                      file_name=>$diff->{'file'})},
4178                                       "history");
4179                         print "</td>\n";
4180
4181                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4182                         my $mode_chnge = "";
4183                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4184                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4185                                 if ($from_file_type ne $to_file_type) {
4186                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4187                                 }
4188                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4189                                         if ($from_mode_str && $to_mode_str) {
4190                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4191                                         } elsif ($to_mode_str) {
4192                                                 $mode_chnge .= " mode: $to_mode_str";
4193                                         }
4194                                 }
4195                                 $mode_chnge .= "]</span>\n";
4196                         }
4197                         print "<td>";
4198                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4199                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4200                                       -class => "list"}, esc_path($diff->{'file'}));
4201                         print "</td>\n";
4202                         print "<td>$mode_chnge</td>\n";
4203                         print "<td class=\"link\">";
4204                         if ($action eq 'commitdiff') {
4205                                 # link to patch
4206                                 $patchno++;
4207                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4208                                       " | ";
4209                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4210                                 # "commit" view and modified file (not onlu mode changed)
4211                                 print $cgi->a({-href => href(action=>"blobdiff",
4212                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4213                                                              hash_base=>$hash, hash_parent_base=>$parent,
4214                                                              file_name=>$diff->{'file'})},
4215                                               "diff") .
4216                                       " | ";
4217                         }
4218                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4219                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4220                                        "blob") . " | ";
4221                         if ($have_blame) {
4222                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4223                                                              file_name=>$diff->{'file'})},
4224                                               "blame") . " | ";
4225                         }
4226                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4227                                                      file_name=>$diff->{'file'})},
4228                                       "history");
4229                         print "</td>\n";
4230
4231                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4232                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4233                         my $nstatus = $status_name{$diff->{'status'}};
4234                         my $mode_chng = "";
4235                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4236                                 # mode also for directories, so we cannot use $to_mode_str
4237                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4238                         }
4239                         print "<td>" .
4240                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4241                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4242                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4243                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4244                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4245                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4246                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4247                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4248                               "<td class=\"link\">";
4249                         if ($action eq 'commitdiff') {
4250                                 # link to patch
4251                                 $patchno++;
4252                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4253                                       " | ";
4254                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4255                                 # "commit" view and modified file (not only pure rename or copy)
4256                                 print $cgi->a({-href => href(action=>"blobdiff",
4257                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4258                                                              hash_base=>$hash, hash_parent_base=>$parent,
4259                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4260                                               "diff") .
4261                                       " | ";
4262                         }
4263                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4264                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4265                                       "blob") . " | ";
4266                         if ($have_blame) {
4267                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4268                                                              file_name=>$diff->{'to_file'})},
4269                                               "blame") . " | ";
4270                         }
4271                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4272                                                     file_name=>$diff->{'to_file'})},
4273                                       "history");
4274                         print "</td>\n";
4275
4276                 } # we should not encounter Unmerged (U) or Unknown (X) status
4277                 print "</tr>\n";
4278         }
4279         print "</tbody>" if $has_header;
4280         print "</table>\n";
4281 }
4282
4283 sub git_patchset_body {
4284         my ($fd, $difftree, $hash, @hash_parents) = @_;
4285         my ($hash_parent) = $hash_parents[0];
4286
4287         my $is_combined = (@hash_parents > 1);
4288         my $patch_idx = 0;
4289         my $patch_number = 0;
4290         my $patch_line;
4291         my $diffinfo;
4292         my $to_name;
4293         my (%from, %to);
4294
4295         print "<div class=\"patchset\">\n";
4296
4297         # skip to first patch
4298         while ($patch_line = <$fd>) {
4299                 chomp $patch_line;
4300
4301                 last if ($patch_line =~ m/^diff /);
4302         }
4303
4304  PATCH:
4305         while ($patch_line) {
4306
4307                 # parse "git diff" header line
4308                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4309                         # $1 is from_name, which we do not use
4310                         $to_name = unquote($2);
4311                         $to_name =~ s!^b/!!;
4312                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4313                         # $1 is 'cc' or 'combined', which we do not use
4314                         $to_name = unquote($2);
4315                 } else {
4316                         $to_name = undef;
4317                 }
4318
4319                 # check if current patch belong to current raw line
4320                 # and parse raw git-diff line if needed
4321                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4322                         # this is continuation of a split patch
4323                         print "<div class=\"patch cont\">\n";
4324                 } else {
4325                         # advance raw git-diff output if needed
4326                         $patch_idx++ if defined $diffinfo;
4327
4328                         # read and prepare patch information
4329                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4330
4331                         # compact combined diff output can have some patches skipped
4332                         # find which patch (using pathname of result) we are at now;
4333                         if ($is_combined) {
4334                                 while ($to_name ne $diffinfo->{'to_file'}) {
4335                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4336                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4337                                               "</div>\n";  # class="patch"
4338
4339                                         $patch_idx++;
4340                                         $patch_number++;
4341
4342                                         last if $patch_idx > $#$difftree;
4343                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4344                                 }
4345                         }
4346
4347                         # modifies %from, %to hashes
4348                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4349
4350                         # this is first patch for raw difftree line with $patch_idx index
4351                         # we index @$difftree array from 0, but number patches from 1
4352                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4353                 }
4354
4355                 # git diff header
4356                 #assert($patch_line =~ m/^diff /) if DEBUG;
4357                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4358                 $patch_number++;
4359                 # print "git diff" header
4360                 print format_git_diff_header_line($patch_line, $diffinfo,
4361                                                   \%from, \%to);
4362
4363                 # print extended diff header
4364                 print "<div class=\"diff extended_header\">\n";
4365         EXTENDED_HEADER:
4366                 while ($patch_line = <$fd>) {
4367                         chomp $patch_line;
4368
4369                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4370
4371                         print format_extended_diff_header_line($patch_line, $diffinfo,
4372                                                                \%from, \%to);
4373                 }
4374                 print "</div>\n"; # class="diff extended_header"
4375
4376                 # from-file/to-file diff header
4377                 if (! $patch_line) {
4378                         print "</div>\n"; # class="patch"
4379                         last PATCH;
4380                 }
4381                 next PATCH if ($patch_line =~ m/^diff /);
4382                 #assert($patch_line =~ m/^---/) if DEBUG;
4383
4384                 my $last_patch_line = $patch_line;
4385                 $patch_line = <$fd>;
4386                 chomp $patch_line;
4387                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4388
4389                 print format_diff_from_to_header($last_patch_line, $patch_line,
4390                                                  $diffinfo, \%from, \%to,
4391                                                  @hash_parents);
4392
4393                 # the patch itself
4394         LINE:
4395                 while ($patch_line = <$fd>) {
4396                         chomp $patch_line;
4397
4398                         next PATCH if ($patch_line =~ m/^diff /);
4399
4400                         print format_diff_line($patch_line, \%from, \%to);
4401                 }
4402
4403         } continue {
4404                 print "</div>\n"; # class="patch"
4405         }
4406
4407         # for compact combined (--cc) format, with chunk and patch simpliciaction
4408         # patchset might be empty, but there might be unprocessed raw lines
4409         for (++$patch_idx if $patch_number > 0;
4410              $patch_idx < @$difftree;
4411              ++$patch_idx) {
4412                 # read and prepare patch information
4413                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4414
4415                 # generate anchor for "patch" links in difftree / whatchanged part
4416                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4417                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4418                       "</div>\n";  # class="patch"
4419
4420                 $patch_number++;
4421         }
4422
4423         if ($patch_number == 0) {
4424                 if (@hash_parents > 1) {
4425                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4426                 } else {
4427                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4428                 }
4429         }
4430
4431         print "</div>\n"; # class="patchset"
4432 }
4433
4434 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4435
4436 # fills project list info (age, description, owner, forks) for each
4437 # project in the list, removing invalid projects from returned list
4438 # NOTE: modifies $projlist, but does not remove entries from it
4439 sub fill_project_list_info {
4440         my ($projlist, $check_forks) = @_;
4441         my @projects;
4442
4443         my $show_ctags = gitweb_check_feature('ctags');
4444  PROJECT:
4445         foreach my $pr (@$projlist) {
4446                 my (@activity) = git_get_last_activity($pr->{'path'});
4447                 unless (@activity) {
4448                         next PROJECT;
4449                 }
4450                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4451                 if (!defined $pr->{'descr'}) {
4452                         my $descr = git_get_project_description($pr->{'path'}) || "";
4453                         $descr = to_utf8($descr);
4454                         $pr->{'descr_long'} = $descr;
4455                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4456                 }
4457                 if (!defined $pr->{'owner'}) {
4458                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4459                 }
4460                 if ($check_forks) {
4461                         my $pname = $pr->{'path'};
4462                         if (($pname =~ s/\.git$//) &&
4463                             ($pname !~ /\/$/) &&
4464                             (-d "$projectroot/$pname")) {
4465                                 $pr->{'forks'} = "-d $projectroot/$pname";
4466                         } else {
4467                                 $pr->{'forks'} = 0;
4468                         }
4469                 }
4470                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4471                 push @projects, $pr;
4472         }
4473
4474         return @projects;
4475 }
4476
4477 # print 'sort by' <th> element, generating 'sort by $name' replay link
4478 # if that order is not selected
4479 sub print_sort_th {
4480         print format_sort_th(@_);
4481 }
4482
4483 sub format_sort_th {
4484         my ($name, $order, $header) = @_;
4485         my $sort_th = "";
4486         $header ||= ucfirst($name);
4487
4488         if ($order eq $name) {
4489                 $sort_th .= "<th>$header</th>\n";
4490         } else {
4491                 $sort_th .= "<th>" .
4492                             $cgi->a({-href => href(-replay=>1, order=>$name),
4493                                      -class => "header"}, $header) .
4494                             "</th>\n";
4495         }
4496
4497         return $sort_th;
4498 }
4499
4500 sub git_project_list_body {
4501         # actually uses global variable $project
4502         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4503
4504         my $check_forks = gitweb_check_feature('forks');
4505         my @projects = fill_project_list_info($projlist, $check_forks);
4506
4507         $order ||= $default_projects_order;
4508         $from = 0 unless defined $from;
4509         $to = $#projects if (!defined $to || $#projects < $to);
4510
4511         my %order_info = (
4512                 project => { key => 'path', type => 'str' },
4513                 descr => { key => 'descr_long', type => 'str' },
4514                 owner => { key => 'owner', type => 'str' },
4515                 age => { key => 'age', type => 'num' }
4516         );
4517         my $oi = $order_info{$order};
4518         if ($oi->{'type'} eq 'str') {
4519                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4520         } else {
4521                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4522         }
4523
4524         my $show_ctags = gitweb_check_feature('ctags');
4525         if ($show_ctags) {
4526                 my %ctags;
4527                 foreach my $p (@projects) {
4528                         foreach my $ct (keys %{$p->{'ctags'}}) {
4529                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4530                         }
4531                 }
4532                 my $cloud = git_populate_project_tagcloud(\%ctags);
4533                 print git_show_project_tagcloud($cloud, 64);
4534         }
4535
4536         print "<table class=\"project_list\">\n";
4537         unless ($no_header) {
4538                 print "<tr>\n";
4539                 if ($check_forks) {
4540                         print "<th></th>\n";
4541                 }
4542                 print_sort_th('project', $order, 'Project');
4543                 print_sort_th('descr', $order, 'Description');
4544                 print_sort_th('owner', $order, 'Owner');
4545                 print_sort_th('age', $order, 'Last Change');
4546                 print "<th></th>\n" . # for links
4547                       "</tr>\n";
4548         }
4549         my $alternate = 1;
4550         my $tagfilter = $cgi->param('by_tag');
4551         for (my $i = $from; $i <= $to; $i++) {
4552                 my $pr = $projects[$i];
4553
4554                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4555                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4556                         and not $pr->{'descr_long'} =~ /$searchtext/;
4557                 # Weed out forks or non-matching entries of search
4558                 if ($check_forks) {
4559                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4560                         $forkbase="^$forkbase" if $forkbase;
4561                         next if not $searchtext and not $tagfilter and $show_ctags
4562                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4563                 }
4564
4565                 if ($alternate) {
4566                         print "<tr class=\"dark\">\n";
4567                 } else {
4568                         print "<tr class=\"light\">\n";
4569                 }
4570                 $alternate ^= 1;
4571                 if ($check_forks) {
4572                         print "<td>";
4573                         if ($pr->{'forks'}) {
4574                                 print "<!-- $pr->{'forks'} -->\n";
4575                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4576                         }
4577                         print "</td>\n";
4578                 }
4579                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4580                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4581                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4582                                         -class => "list", -title => $pr->{'descr_long'}},
4583                                         esc_html($pr->{'descr'})) . "</td>\n" .
4584                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4585                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4586                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4587                       "<td class=\"link\">" .
4588                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4589                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4590                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4591                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4592                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4593                       "</td>\n" .
4594                       "</tr>\n";
4595         }
4596         if (defined $extra) {
4597                 print "<tr>\n";
4598                 if ($check_forks) {
4599                         print "<td></td>\n";
4600                 }
4601                 print "<td colspan=\"5\">$extra</td>\n" .
4602                       "</tr>\n";
4603         }
4604         print "</table>\n";
4605 }
4606
4607 sub git_log_body {
4608         # uses global variable $project
4609         my ($commitlist, $from, $to, $refs, $extra) = @_;
4610
4611         $from = 0 unless defined $from;
4612         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4613
4614         for (my $i = 0; $i <= $to; $i++) {
4615                 my %co = %{$commitlist->[$i]};
4616                 next if !%co;
4617                 my $commit = $co{'id'};
4618                 my $ref = format_ref_marker($refs, $commit);
4619                 my %ad = parse_date($co{'author_epoch'});
4620                 git_print_header_div('commit',
4621                                "<span class=\"age\">$co{'age_string'}</span>" .
4622                                esc_html($co{'title'}) . $ref,
4623                                $commit);
4624                 print "<div class=\"title_text\">\n" .
4625                       "<div class=\"log_link\">\n" .
4626                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4627                       " | " .
4628                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4629                       " | " .
4630                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4631                       "<br/>\n" .
4632                       "</div>\n";
4633                       git_print_authorship(\%co, -tag => 'span');
4634                       print "<br/>\n</div>\n";
4635
4636                 print "<div class=\"log_body\">\n";
4637                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4638                 print "</div>\n";
4639         }
4640         if ($extra) {
4641                 print "<div class=\"page_nav\">\n";
4642                 print "$extra\n";
4643                 print "</div>\n";
4644         }
4645 }
4646
4647 sub git_shortlog_body {
4648         # uses global variable $project
4649         my ($commitlist, $from, $to, $refs, $extra) = @_;
4650
4651         $from = 0 unless defined $from;
4652         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4653
4654         print "<table class=\"shortlog\">\n";
4655         my $alternate = 1;
4656         for (my $i = $from; $i <= $to; $i++) {
4657                 my %co = %{$commitlist->[$i]};
4658                 my $commit = $co{'id'};
4659                 my $ref = format_ref_marker($refs, $commit);
4660                 if ($alternate) {
4661                         print "<tr class=\"dark\">\n";
4662                 } else {
4663                         print "<tr class=\"light\">\n";
4664                 }
4665                 $alternate ^= 1;
4666                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4667                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4668                       format_author_html('td', \%co, 10) . "<td>";
4669                 print format_subject_html($co{'title'}, $co{'title_short'},
4670                                           href(action=>"commit", hash=>$commit), $ref);
4671                 print "</td>\n" .
4672                       "<td class=\"link\">" .
4673                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4674                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4675                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4676                 my $snapshot_links = format_snapshot_links($commit);
4677                 if (defined $snapshot_links) {
4678                         print " | " . $snapshot_links;
4679                 }
4680                 print "</td>\n" .
4681                       "</tr>\n";
4682         }
4683         if (defined $extra) {
4684                 print "<tr>\n" .
4685                       "<td colspan=\"4\">$extra</td>\n" .
4686                       "</tr>\n";
4687         }
4688         print "</table>\n";
4689 }
4690
4691 sub git_history_body {
4692         # Warning: assumes constant type (blob or tree) during history
4693         my ($commitlist, $from, $to, $refs, $extra,
4694             $file_name, $file_hash, $ftype) = @_;
4695
4696         $from = 0 unless defined $from;
4697         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4698
4699         print "<table class=\"history\">\n";
4700         my $alternate = 1;
4701         for (my $i = $from; $i <= $to; $i++) {
4702                 my %co = %{$commitlist->[$i]};
4703                 if (!%co) {
4704                         next;
4705                 }
4706                 my $commit = $co{'id'};
4707
4708                 my $ref = format_ref_marker($refs, $commit);
4709
4710                 if ($alternate) {
4711                         print "<tr class=\"dark\">\n";
4712                 } else {
4713                         print "<tr class=\"light\">\n";
4714                 }
4715                 $alternate ^= 1;
4716                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4717         # shortlog:   format_author_html('td', \%co, 10)
4718                       format_author_html('td', \%co, 15, 3) . "<td>";
4719                 # originally git_history used chop_str($co{'title'}, 50)
4720                 print format_subject_html($co{'title'}, $co{'title_short'},
4721                                           href(action=>"commit", hash=>$commit), $ref);
4722                 print "</td>\n" .
4723                       "<td class=\"link\">" .
4724                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4725                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4726
4727                 if ($ftype eq 'blob') {
4728                         my $blob_current = $file_hash;
4729                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4730                         if (defined $blob_current && defined $blob_parent &&
4731                                         $blob_current ne $blob_parent) {
4732                                 print " | " .
4733                                         $cgi->a({-href => href(action=>"blobdiff",
4734                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4735                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4736                                                                file_name=>$file_name)},
4737                                                 "diff to current");
4738                         }
4739                 }
4740                 print "</td>\n" .
4741                       "</tr>\n";
4742         }
4743         if (defined $extra) {
4744                 print "<tr>\n" .
4745                       "<td colspan=\"4\">$extra</td>\n" .
4746                       "</tr>\n";
4747         }
4748         print "</table>\n";
4749 }
4750
4751 sub git_tags_body {
4752         # uses global variable $project
4753         my ($taglist, $from, $to, $extra) = @_;
4754         $from = 0 unless defined $from;
4755         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4756
4757         print "<table class=\"tags\">\n";
4758         my $alternate = 1;
4759         for (my $i = $from; $i <= $to; $i++) {
4760                 my $entry = $taglist->[$i];
4761                 my %tag = %$entry;
4762                 my $comment = $tag{'subject'};
4763                 my $comment_short;
4764                 if (defined $comment) {
4765                         $comment_short = chop_str($comment, 30, 5);
4766                 }
4767                 if ($alternate) {
4768                         print "<tr class=\"dark\">\n";
4769                 } else {
4770                         print "<tr class=\"light\">\n";
4771                 }
4772                 $alternate ^= 1;
4773                 if (defined $tag{'age'}) {
4774                         print "<td><i>$tag{'age'}</i></td>\n";
4775                 } else {
4776                         print "<td></td>\n";
4777                 }
4778                 print "<td>" .
4779                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4780                                -class => "list name"}, esc_html($tag{'name'})) .
4781                       "</td>\n" .
4782                       "<td>";
4783                 if (defined $comment) {
4784                         print format_subject_html($comment, $comment_short,
4785                                                   href(action=>"tag", hash=>$tag{'id'}));
4786                 }
4787                 print "</td>\n" .
4788                       "<td class=\"selflink\">";
4789                 if ($tag{'type'} eq "tag") {
4790                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4791                 } else {
4792                         print "&nbsp;";
4793                 }
4794                 print "</td>\n" .
4795                       "<td class=\"link\">" . " | " .
4796                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4797                 if ($tag{'reftype'} eq "commit") {
4798                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4799                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4800                 } elsif ($tag{'reftype'} eq "blob") {
4801                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4802                 }
4803                 print "</td>\n" .
4804                       "</tr>";
4805         }
4806         if (defined $extra) {
4807                 print "<tr>\n" .
4808                       "<td colspan=\"5\">$extra</td>\n" .
4809                       "</tr>\n";
4810         }
4811         print "</table>\n";
4812 }
4813
4814 sub git_heads_body {
4815         # uses global variable $project
4816         my ($headlist, $head, $from, $to, $extra) = @_;
4817         $from = 0 unless defined $from;
4818         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4819
4820         print "<table class=\"heads\">\n";
4821         my $alternate = 1;
4822         for (my $i = $from; $i <= $to; $i++) {
4823                 my $entry = $headlist->[$i];
4824                 my %ref = %$entry;
4825                 my $curr = $ref{'id'} eq $head;
4826                 if ($alternate) {
4827                         print "<tr class=\"dark\">\n";
4828                 } else {
4829                         print "<tr class=\"light\">\n";
4830                 }
4831                 $alternate ^= 1;
4832                 print "<td><i>$ref{'age'}</i></td>\n" .
4833                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4834                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4835                                -class => "list name"},esc_html($ref{'name'})) .
4836                       "</td>\n" .
4837                       "<td class=\"link\">" .
4838                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4839                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4840                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4841                       "</td>\n" .
4842                       "</tr>";
4843         }
4844         if (defined $extra) {
4845                 print "<tr>\n" .
4846                       "<td colspan=\"3\">$extra</td>\n" .
4847                       "</tr>\n";
4848         }
4849         print "</table>\n";
4850 }
4851
4852 sub git_search_grep_body {
4853         my ($commitlist, $from, $to, $extra) = @_;
4854         $from = 0 unless defined $from;
4855         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4856
4857         print "<table class=\"commit_search\">\n";
4858         my $alternate = 1;
4859         for (my $i = $from; $i <= $to; $i++) {
4860                 my %co = %{$commitlist->[$i]};
4861                 if (!%co) {
4862                         next;
4863                 }
4864                 my $commit = $co{'id'};
4865                 if ($alternate) {
4866                         print "<tr class=\"dark\">\n";
4867                 } else {
4868                         print "<tr class=\"light\">\n";
4869                 }
4870                 $alternate ^= 1;
4871                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4872                       format_author_html('td', \%co, 15, 5) .
4873                       "<td>" .
4874                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4875                                -class => "list subject"},
4876                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4877                 my $comment = $co{'comment'};
4878                 foreach my $line (@$comment) {
4879                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4880                                 my ($lead, $match, $trail) = ($1, $2, $3);
4881                                 $match = chop_str($match, 70, 5, 'center');
4882                                 my $contextlen = int((80 - length($match))/2);
4883                                 $contextlen = 30 if ($contextlen > 30);
4884                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4885                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4886
4887                                 $lead  = esc_html($lead);
4888                                 $match = esc_html($match);
4889                                 $trail = esc_html($trail);
4890
4891                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4892                         }
4893                 }
4894                 print "</td>\n" .
4895                       "<td class=\"link\">" .
4896                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4897                       " | " .
4898                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4899                       " | " .
4900                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4901                 print "</td>\n" .
4902                       "</tr>\n";
4903         }
4904         if (defined $extra) {
4905                 print "<tr>\n" .
4906                       "<td colspan=\"3\">$extra</td>\n" .
4907                       "</tr>\n";
4908         }
4909         print "</table>\n";
4910 }
4911
4912 ## ======================================================================
4913 ## ======================================================================
4914 ## actions
4915
4916 sub git_project_list {
4917         my $order = $input_params{'order'};
4918         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4919                 die_error(400, "Unknown order parameter");
4920         }
4921
4922         my @list = git_get_projects_list();
4923         if (!@list) {
4924                 die_error(404, "No projects found");
4925         }
4926
4927         git_header_html();
4928         if (defined $home_text && -f $home_text) {
4929                 print "<div class=\"index_include\">\n";
4930                 insert_file($home_text);
4931                 print "</div>\n";
4932         }
4933         print $cgi->startform(-method => "get") .
4934               "<p class=\"projsearch\">Search:\n" .
4935               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4936               "</p>" .
4937               $cgi->end_form() . "\n";
4938         git_project_list_body(\@list, $order);
4939         git_footer_html();
4940 }
4941
4942 sub git_forks {
4943         my $order = $input_params{'order'};
4944         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4945                 die_error(400, "Unknown order parameter");
4946         }
4947
4948         my @list = git_get_projects_list($project);
4949         if (!@list) {
4950                 die_error(404, "No forks found");
4951         }
4952
4953         git_header_html();
4954         git_print_page_nav('','');
4955         git_print_header_div('summary', "$project forks");
4956         git_project_list_body(\@list, $order);
4957         git_footer_html();
4958 }
4959
4960 sub git_project_index {
4961         my @projects = git_get_projects_list($project);
4962
4963         print $cgi->header(
4964                 -type => 'text/plain',
4965                 -charset => 'utf-8',
4966                 -content_disposition => 'inline; filename="index.aux"');
4967
4968         foreach my $pr (@projects) {
4969                 if (!exists $pr->{'owner'}) {
4970                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4971                 }
4972
4973                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4974                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4975                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4976                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4977                 $path  =~ s/ /\+/g;
4978                 $owner =~ s/ /\+/g;
4979
4980                 print "$path $owner\n";
4981         }
4982 }
4983
4984 sub git_summary {
4985         my $descr = git_get_project_description($project) || "none";
4986         my %co = parse_commit("HEAD");
4987         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4988         my $head = $co{'id'};
4989
4990         my $owner = git_get_project_owner($project);
4991
4992         my $refs = git_get_references();
4993         # These get_*_list functions return one more to allow us to see if
4994         # there are more ...
4995         my @taglist  = git_get_tags_list(16);
4996         my @headlist = git_get_heads_list(16);
4997         my @forklist;
4998         my $check_forks = gitweb_check_feature('forks');
4999
5000         if ($check_forks) {
5001                 @forklist = git_get_projects_list($project);
5002         }
5003
5004         git_header_html();
5005         git_print_page_nav('summary','', $head);
5006
5007         print "<div class=\"title\">&nbsp;</div>\n";
5008         print "<table class=\"projects_list\">\n" .
5009               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5010               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5011         if (defined $cd{'rfc2822'}) {
5012                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5013         }
5014
5015         # use per project git URL list in $projectroot/$project/cloneurl
5016         # or make project git URL from git base URL and project name
5017         my $url_tag = "URL";
5018         my @url_list = git_get_project_url_list($project);
5019         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5020         foreach my $git_url (@url_list) {
5021                 next unless $git_url;
5022                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5023                 $url_tag = "";
5024         }
5025
5026         # Tag cloud
5027         my $show_ctags = gitweb_check_feature('ctags');
5028         if ($show_ctags) {
5029                 my $ctags = git_get_project_ctags($project);
5030                 my $cloud = git_populate_project_tagcloud($ctags);
5031                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5032                 print "</td>\n<td>" unless %$ctags;
5033                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5034                 print "</td>\n<td>" if %$ctags;
5035                 print git_show_project_tagcloud($cloud, 48);
5036                 print "</td></tr>";
5037         }
5038
5039         print "</table>\n";
5040
5041         # If XSS prevention is on, we don't include README.html.
5042         # TODO: Allow a readme in some safe format.
5043         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5044                 print "<div class=\"title\">readme</div>\n" .
5045                       "<div class=\"readme\">\n";
5046                 insert_file("$projectroot/$project/README.html");
5047                 print "\n</div>\n"; # class="readme"
5048         }
5049
5050         # we need to request one more than 16 (0..15) to check if
5051         # those 16 are all
5052         my @commitlist = $head ? parse_commits($head, 17) : ();
5053         if (@commitlist) {
5054                 git_print_header_div('shortlog');
5055                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5056                                   $#commitlist <=  15 ? undef :
5057                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5058         }
5059
5060         if (@taglist) {
5061                 git_print_header_div('tags');
5062                 git_tags_body(\@taglist, 0, 15,
5063                               $#taglist <=  15 ? undef :
5064                               $cgi->a({-href => href(action=>"tags")}, "..."));
5065         }
5066
5067         if (@headlist) {
5068                 git_print_header_div('heads');
5069                 git_heads_body(\@headlist, $head, 0, 15,
5070                                $#headlist <= 15 ? undef :
5071                                $cgi->a({-href => href(action=>"heads")}, "..."));
5072         }
5073
5074         if (@forklist) {
5075                 git_print_header_div('forks');
5076                 git_project_list_body(\@forklist, 'age', 0, 15,
5077                                       $#forklist <= 15 ? undef :
5078                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5079                                       'no_header');
5080         }
5081
5082         git_footer_html();
5083 }
5084
5085 sub git_tag {
5086         my $head = git_get_head_hash($project);
5087         git_header_html();
5088         git_print_page_nav('','', $head,undef,$head);
5089         my %tag = parse_tag($hash);
5090
5091         if (! %tag) {
5092                 die_error(404, "Unknown tag object");
5093         }
5094
5095         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5096         print "<div class=\"title_text\">\n" .
5097               "<table class=\"object_header\">\n" .
5098               "<tr>\n" .
5099               "<td>object</td>\n" .
5100               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5101                                $tag{'object'}) . "</td>\n" .
5102               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5103                                               $tag{'type'}) . "</td>\n" .
5104               "</tr>\n";
5105         if (defined($tag{'author'})) {
5106                 git_print_authorship_rows(\%tag, 'author');
5107         }
5108         print "</table>\n\n" .
5109               "</div>\n";
5110         print "<div class=\"page_body\">";
5111         my $comment = $tag{'comment'};
5112         foreach my $line (@$comment) {
5113                 chomp $line;
5114                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5115         }
5116         print "</div>\n";
5117         git_footer_html();
5118 }
5119
5120 sub git_blame_common {
5121         my $format = shift || 'porcelain';
5122         if ($format eq 'porcelain' && $cgi->param('js')) {
5123                 $format = 'incremental';
5124                 $action = 'blame_incremental'; # for page title etc
5125         }
5126
5127         # permissions
5128         gitweb_check_feature('blame')
5129                 or die_error(403, "Blame view not allowed");
5130
5131         # error checking
5132         die_error(400, "No file name given") unless $file_name;
5133         $hash_base ||= git_get_head_hash($project);
5134         die_error(404, "Couldn't find base commit") unless $hash_base;
5135         my %co = parse_commit($hash_base)
5136                 or die_error(404, "Commit not found");
5137         my $ftype = "blob";
5138         if (!defined $hash) {
5139                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5140                         or die_error(404, "Error looking up file");
5141         } else {
5142                 $ftype = git_get_type($hash);
5143                 if ($ftype !~ "blob") {
5144                         die_error(400, "Object is not a blob");
5145                 }
5146         }
5147
5148         my $fd;
5149         if ($format eq 'incremental') {
5150                 # get file contents (as base)
5151                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5152                         or die_error(500, "Open git-cat-file failed");
5153         } elsif ($format eq 'data') {
5154                 # run git-blame --incremental
5155                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5156                         $hash_base, "--", $file_name
5157                         or die_error(500, "Open git-blame --incremental failed");
5158         } else {
5159                 # run git-blame --porcelain
5160                 open $fd, "-|", git_cmd(), "blame", '-p',
5161                         $hash_base, '--', $file_name
5162                         or die_error(500, "Open git-blame --porcelain failed");
5163         }
5164
5165         # incremental blame data returns early
5166         if ($format eq 'data') {
5167                 print $cgi->header(
5168                         -type=>"text/plain", -charset => "utf-8",
5169                         -status=> "200 OK");
5170                 local $| = 1; # output autoflush
5171                 print while <$fd>;
5172                 close $fd
5173                         or print "ERROR $!\n";
5174
5175                 print 'END';
5176                 if (defined $t0 && gitweb_check_feature('timed')) {
5177                         print ' '.
5178                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5179                               ' '.$number_of_git_cmds;
5180                 }
5181                 print "\n";
5182
5183                 return;
5184         }
5185
5186         # page header
5187         git_header_html();
5188         my $formats_nav =
5189                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5190                         "blob") .
5191                 " | ";
5192         if ($format eq 'incremental') {
5193                 $formats_nav .=
5194                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5195                                 "blame") . " (non-incremental)";
5196         } else {
5197                 $formats_nav .=
5198                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5199                                 "blame") . " (incremental)";
5200         }
5201         $formats_nav .=
5202                 " | " .
5203                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5204                         "history") .
5205                 " | " .
5206                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5207                         "HEAD");
5208         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5209         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5210         git_print_page_path($file_name, $ftype, $hash_base);
5211
5212         # page body
5213         if ($format eq 'incremental') {
5214                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5215                       "This page requires JavaScript to run.\n Use ".
5216                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5217                               'this page').
5218                       " instead.\n".
5219                       "</b></center></div>\n</noscript>\n";
5220
5221                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5222         }
5223
5224         print qq!<div class="page_body">\n!;
5225         print qq!<div id="progress_info">... / ...</div>\n!
5226                 if ($format eq 'incremental');
5227         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5228               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5229               qq!<thead>\n!.
5230               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5231               qq!</thead>\n!.
5232               qq!<tbody>\n!;
5233
5234         my @rev_color = qw(light dark);
5235         my $num_colors = scalar(@rev_color);
5236         my $current_color = 0;
5237
5238         if ($format eq 'incremental') {
5239                 my $color_class = $rev_color[$current_color];
5240
5241                 #contents of a file
5242                 my $linenr = 0;
5243         LINE:
5244                 while (my $line = <$fd>) {
5245                         chomp $line;
5246                         $linenr++;
5247
5248                         print qq!<tr id="l$linenr" class="$color_class">!.
5249                               qq!<td class="sha1"><a href=""> </a></td>!.
5250                               qq!<td class="linenr">!.
5251                               qq!<a class="linenr" href="">$linenr</a></td>!;
5252                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5253                         print qq!</tr>\n!;
5254                 }
5255
5256         } else { # porcelain, i.e. ordinary blame
5257                 my %metainfo = (); # saves information about commits
5258
5259                 # blame data
5260         LINE:
5261                 while (my $line = <$fd>) {
5262                         chomp $line;
5263                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5264                         # no <lines in group> for subsequent lines in group of lines
5265                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5266                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5267                         if (!exists $metainfo{$full_rev}) {
5268                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5269                         }
5270                         my $meta = $metainfo{$full_rev};
5271                         my $data;
5272                         while ($data = <$fd>) {
5273                                 chomp $data;
5274                                 last if ($data =~ s/^\t//); # contents of line
5275                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5276                                         $meta->{$1} = $2 unless exists $meta->{$1};
5277                                 }
5278                                 if ($data =~ /^previous /) {
5279                                         $meta->{'nprevious'}++;
5280                                 }
5281                         }
5282                         my $short_rev = substr($full_rev, 0, 8);
5283                         my $author = $meta->{'author'};
5284                         my %date =
5285                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5286                         my $date = $date{'iso-tz'};
5287                         if ($group_size) {
5288                                 $current_color = ($current_color + 1) % $num_colors;
5289                         }
5290                         my $tr_class = $rev_color[$current_color];
5291                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5292                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5293                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5294                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5295                         if ($group_size) {
5296                                 print "<td class=\"sha1\"";
5297                                 print " title=\"". esc_html($author) . ", $date\"";
5298                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5299                                 print ">";
5300                                 print $cgi->a({-href => href(action=>"commit",
5301                                                              hash=>$full_rev,
5302                                                              file_name=>$file_name)},
5303                                               esc_html($short_rev));
5304                                 if ($group_size >= 2) {
5305                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5306                                         if (@author_initials) {
5307                                                 print "<br />" .
5308                                                       esc_html(join('', @author_initials));
5309                                                 #           or join('.', ...)
5310                                         }
5311                                 }
5312                                 print "</td>\n";
5313                         }
5314                         # 'previous' <sha1 of parent commit> <filename at commit>
5315                         if (exists $meta->{'previous'} &&
5316                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5317                                 $meta->{'parent'} = $1;
5318                                 $meta->{'file_parent'} = unquote($2);
5319                         }
5320                         my $linenr_commit =
5321                                 exists($meta->{'parent'}) ?
5322                                 $meta->{'parent'} : $full_rev;
5323                         my $linenr_filename =
5324                                 exists($meta->{'file_parent'}) ?
5325                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5326                         my $blamed = href(action => 'blame',
5327                                           file_name => $linenr_filename,
5328                                           hash_base => $linenr_commit);
5329                         print "<td class=\"linenr\">";
5330                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5331                                         -class => "linenr" },
5332                                       esc_html($lineno));
5333                         print "</td>";
5334                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5335                         print "</tr>\n";
5336                 } # end while
5337
5338         }
5339
5340         # footer
5341         print "</tbody>\n".
5342               "</table>\n"; # class="blame"
5343         print "</div>\n";   # class="blame_body"
5344         close $fd
5345                 or print "Reading blob failed\n";
5346
5347         git_footer_html();
5348 }
5349
5350 sub git_blame {
5351         git_blame_common();
5352 }
5353
5354 sub git_blame_incremental {
5355         git_blame_common('incremental');
5356 }
5357
5358 sub git_blame_data {
5359         git_blame_common('data');
5360 }
5361
5362 sub git_tags {
5363         my $head = git_get_head_hash($project);
5364         git_header_html();
5365         git_print_page_nav('','', $head,undef,$head);
5366         git_print_header_div('summary', $project);
5367
5368         my @tagslist = git_get_tags_list();
5369         if (@tagslist) {
5370                 git_tags_body(\@tagslist);
5371         }
5372         git_footer_html();
5373 }
5374
5375 sub git_heads {
5376         my $head = git_get_head_hash($project);
5377         git_header_html();
5378         git_print_page_nav('','', $head,undef,$head);
5379         git_print_header_div('summary', $project);
5380
5381         my @headslist = git_get_heads_list();
5382         if (@headslist) {
5383                 git_heads_body(\@headslist, $head);
5384         }
5385         git_footer_html();
5386 }
5387
5388 sub git_blob_plain {
5389         my $type = shift;
5390         my $expires;
5391
5392         if (!defined $hash) {
5393                 if (defined $file_name) {
5394                         my $base = $hash_base || git_get_head_hash($project);
5395                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5396                                 or die_error(404, "Cannot find file");
5397                 } else {
5398                         die_error(400, "No file name defined");
5399                 }
5400         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5401                 # blobs defined by non-textual hash id's can be cached
5402                 $expires = "+1d";
5403         }
5404
5405         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5406                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5407
5408         # content-type (can include charset)
5409         $type = blob_contenttype($fd, $file_name, $type);
5410
5411         # "save as" filename, even when no $file_name is given
5412         my $save_as = "$hash";
5413         if (defined $file_name) {
5414                 $save_as = $file_name;
5415         } elsif ($type =~ m/^text\//) {
5416                 $save_as .= '.txt';
5417         }
5418
5419         # With XSS prevention on, blobs of all types except a few known safe
5420         # ones are served with "Content-Disposition: attachment" to make sure
5421         # they don't run in our security domain.  For certain image types,
5422         # blob view writes an <img> tag referring to blob_plain view, and we
5423         # want to be sure not to break that by serving the image as an
5424         # attachment (though Firefox 3 doesn't seem to care).
5425         my $sandbox = $prevent_xss &&
5426                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5427
5428         print $cgi->header(
5429                 -type => $type,
5430                 -expires => $expires,
5431                 -content_disposition =>
5432                         ($sandbox ? 'attachment' : 'inline')
5433                         . '; filename="' . $save_as . '"');
5434         local $/ = undef;
5435         binmode STDOUT, ':raw';
5436         print <$fd>;
5437         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5438         close $fd;
5439 }
5440
5441 sub git_blob {
5442         my $expires;
5443
5444         if (!defined $hash) {
5445                 if (defined $file_name) {
5446                         my $base = $hash_base || git_get_head_hash($project);
5447                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5448                                 or die_error(404, "Cannot find file");
5449                 } else {
5450                         die_error(400, "No file name defined");
5451                 }
5452         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5453                 # blobs defined by non-textual hash id's can be cached
5454                 $expires = "+1d";
5455         }
5456
5457         my $have_blame = gitweb_check_feature('blame');
5458         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5459                 or die_error(500, "Couldn't cat $file_name, $hash");
5460         my $mimetype = blob_mimetype($fd, $file_name);
5461         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5462                 close $fd;
5463                 return git_blob_plain($mimetype);
5464         }
5465         # we can have blame only for text/* mimetype
5466         $have_blame &&= ($mimetype =~ m!^text/!);
5467
5468         git_header_html(undef, $expires);
5469         my $formats_nav = '';
5470         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5471                 if (defined $file_name) {
5472                         if ($have_blame) {
5473                                 $formats_nav .=
5474                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5475                                                 "blame") .
5476                                         " | ";
5477                         }
5478                         $formats_nav .=
5479                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5480                                         "history") .
5481                                 " | " .
5482                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5483                                         "raw") .
5484                                 " | " .
5485                                 $cgi->a({-href => href(action=>"blob",
5486                                                        hash_base=>"HEAD", file_name=>$file_name)},
5487                                         "HEAD");
5488                 } else {
5489                         $formats_nav .=
5490                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5491                                         "raw");
5492                 }
5493                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5494                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5495         } else {
5496                 print "<div class=\"page_nav\">\n" .
5497                       "<br/><br/></div>\n" .
5498                       "<div class=\"title\">$hash</div>\n";
5499         }
5500         git_print_page_path($file_name, "blob", $hash_base);
5501         print "<div class=\"page_body\">\n";
5502         if ($mimetype =~ m!^image/!) {
5503                 print qq!<img type="$mimetype"!;
5504                 if ($file_name) {
5505                         print qq! alt="$file_name" title="$file_name"!;
5506                 }
5507                 print qq! src="! .
5508                       href(action=>"blob_plain", hash=>$hash,
5509                            hash_base=>$hash_base, file_name=>$file_name) .
5510                       qq!" />\n!;
5511         } else {
5512                 my $nr;
5513                 while (my $line = <$fd>) {
5514                         chomp $line;
5515                         $nr++;
5516                         $line = untabify($line);
5517                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5518                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5519                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5520                 }
5521         }
5522         close $fd
5523                 or print "Reading blob failed.\n";
5524         print "</div>";
5525         git_footer_html();
5526 }
5527
5528 sub git_tree {
5529         if (!defined $hash_base) {
5530                 $hash_base = "HEAD";
5531         }
5532         if (!defined $hash) {
5533                 if (defined $file_name) {
5534                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5535                 } else {
5536                         $hash = $hash_base;
5537                 }
5538         }
5539         die_error(404, "No such tree") unless defined($hash);
5540
5541         my $show_sizes = gitweb_check_feature('show-sizes');
5542         my $have_blame = gitweb_check_feature('blame');
5543
5544         my @entries = ();
5545         {
5546                 local $/ = "\0";
5547                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5548                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5549                         or die_error(500, "Open git-ls-tree failed");
5550                 @entries = map { chomp; $_ } <$fd>;
5551                 close $fd
5552                         or die_error(404, "Reading tree failed");
5553         }
5554
5555         my $refs = git_get_references();
5556         my $ref = format_ref_marker($refs, $hash_base);
5557         git_header_html();
5558         my $basedir = '';
5559         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5560                 my @views_nav = ();
5561                 if (defined $file_name) {
5562                         push @views_nav,
5563                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5564                                         "history"),
5565                                 $cgi->a({-href => href(action=>"tree",
5566                                                        hash_base=>"HEAD", file_name=>$file_name)},
5567                                         "HEAD"),
5568                 }
5569                 my $snapshot_links = format_snapshot_links($hash);
5570                 if (defined $snapshot_links) {
5571                         # FIXME: Should be available when we have no hash base as well.
5572                         push @views_nav, $snapshot_links;
5573                 }
5574                 git_print_page_nav('tree','', $hash_base, undef, undef,
5575                                    join(' | ', @views_nav));
5576                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5577         } else {
5578                 undef $hash_base;
5579                 print "<div class=\"page_nav\">\n";
5580                 print "<br/><br/></div>\n";
5581                 print "<div class=\"title\">$hash</div>\n";
5582         }
5583         if (defined $file_name) {
5584                 $basedir = $file_name;
5585                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5586                         $basedir .= '/';
5587                 }
5588                 git_print_page_path($file_name, 'tree', $hash_base);
5589         }
5590         print "<div class=\"page_body\">\n";
5591         print "<table class=\"tree\">\n";
5592         my $alternate = 1;
5593         # '..' (top directory) link if possible
5594         if (defined $hash_base &&
5595             defined $file_name && $file_name =~ m![^/]+$!) {
5596                 if ($alternate) {
5597                         print "<tr class=\"dark\">\n";
5598                 } else {
5599                         print "<tr class=\"light\">\n";
5600                 }
5601                 $alternate ^= 1;
5602
5603                 my $up = $file_name;
5604                 $up =~ s!/?[^/]+$!!;
5605                 undef $up unless $up;
5606                 # based on git_print_tree_entry
5607                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5608                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5609                 print '<td class="list">';
5610                 print $cgi->a({-href => href(action=>"tree",
5611                                              hash_base=>$hash_base,
5612                                              file_name=>$up)},
5613                               "..");
5614                 print "</td>\n";
5615                 print "<td class=\"link\"></td>\n";
5616
5617                 print "</tr>\n";
5618         }
5619         foreach my $line (@entries) {
5620                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5621
5622                 if ($alternate) {
5623                         print "<tr class=\"dark\">\n";
5624                 } else {
5625                         print "<tr class=\"light\">\n";
5626                 }
5627                 $alternate ^= 1;
5628
5629                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5630
5631                 print "</tr>\n";
5632         }
5633         print "</table>\n" .
5634               "</div>";
5635         git_footer_html();
5636 }
5637
5638 sub snapshot_name {
5639         my ($project, $hash) = @_;
5640
5641         # path/to/project.git  -> project
5642         # path/to/project/.git -> project
5643         my $name = to_utf8($project);
5644         $name =~ s,([^/])/*\.git$,$1,;
5645         $name = basename($name);
5646         # sanitize name
5647         $name =~ s/[[:cntrl:]]/?/g;
5648
5649         my $ver = $hash;
5650         if ($hash =~ /^[0-9a-fA-F]+$/) {
5651                 # shorten SHA-1 hash
5652                 my $full_hash = git_get_full_hash($project, $hash);
5653                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5654                         $ver = git_get_short_hash($project, $hash);
5655                 }
5656         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5657                 # tags don't need shortened SHA-1 hash
5658                 $ver = $1;
5659         } else {
5660                 # branches and other need shortened SHA-1 hash
5661                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5662                         $ver = $1;
5663                 }
5664                 $ver .= '-' . git_get_short_hash($project, $hash);
5665         }
5666         # in case of hierarchical branch names
5667         $ver =~ s!/!.!g;
5668
5669         # name = project-version_string
5670         $name = "$name-$ver";
5671
5672         return wantarray ? ($name, $name) : $name;
5673 }
5674
5675 sub git_snapshot {
5676         my $format = $input_params{'snapshot_format'};
5677         if (!@snapshot_fmts) {
5678                 die_error(403, "Snapshots not allowed");
5679         }
5680         # default to first supported snapshot format
5681         $format ||= $snapshot_fmts[0];
5682         if ($format !~ m/^[a-z0-9]+$/) {
5683                 die_error(400, "Invalid snapshot format parameter");
5684         } elsif (!exists($known_snapshot_formats{$format})) {
5685                 die_error(400, "Unknown snapshot format");
5686         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5687                 die_error(403, "Snapshot format not allowed");
5688         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5689                 die_error(403, "Unsupported snapshot format");
5690         }
5691
5692         my $type = git_get_type("$hash^{}");
5693         if (!$type) {
5694                 die_error(404, 'Object does not exist');
5695         }  elsif ($type eq 'blob') {
5696                 die_error(400, 'Object is not a tree-ish');
5697         }
5698
5699         my ($name, $prefix) = snapshot_name($project, $hash);
5700         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5701         my $cmd = quote_command(
5702                 git_cmd(), 'archive',
5703                 "--format=$known_snapshot_formats{$format}{'format'}",
5704                 "--prefix=$prefix/", $hash);
5705         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5706                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5707         }
5708
5709         $filename =~ s/(["\\])/\\$1/g;
5710         print $cgi->header(
5711                 -type => $known_snapshot_formats{$format}{'type'},
5712                 -content_disposition => 'inline; filename="' . $filename . '"',
5713                 -status => '200 OK');
5714
5715         open my $fd, "-|", $cmd
5716                 or die_error(500, "Execute git-archive failed");
5717         binmode STDOUT, ':raw';
5718         print <$fd>;
5719         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5720         close $fd;
5721 }
5722
5723 sub git_log_generic {
5724         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5725
5726         my $head = git_get_head_hash($project);
5727         if (!defined $base) {
5728                 $base = $head;
5729         }
5730         if (!defined $page) {
5731                 $page = 0;
5732         }
5733         my $refs = git_get_references();
5734
5735         my $commit_hash = $base;
5736         if (defined $parent) {
5737                 $commit_hash = "$parent..$base";
5738         }
5739         my @commitlist =
5740                 parse_commits($commit_hash, 101, (100 * $page),
5741                               defined $file_name ? ($file_name, "--full-history") : ());
5742
5743         my $ftype;
5744         if (!defined $file_hash && defined $file_name) {
5745                 # some commits could have deleted file in question,
5746                 # and not have it in tree, but one of them has to have it
5747                 for (my $i = 0; $i < @commitlist; $i++) {
5748                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5749                         last if defined $file_hash;
5750                 }
5751         }
5752         if (defined $file_hash) {
5753                 $ftype = git_get_type($file_hash);
5754         }
5755         if (defined $file_name && !defined $ftype) {
5756                 die_error(500, "Unknown type of object");
5757         }
5758         my %co;
5759         if (defined $file_name) {
5760                 %co = parse_commit($base)
5761                         or die_error(404, "Unknown commit object");
5762         }
5763
5764
5765         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5766         my $next_link = '';
5767         if ($#commitlist >= 100) {
5768                 $next_link =
5769                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5770                                  -accesskey => "n", -title => "Alt-n"}, "next");
5771         }
5772         my $patch_max = gitweb_get_feature('patches');
5773         if ($patch_max && !defined $file_name) {
5774                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5775                         $paging_nav .= " &sdot; " .
5776                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5777                                         "patches");
5778                 }
5779         }
5780
5781         git_header_html();
5782         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5783         if (defined $file_name) {
5784                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5785         } else {
5786                 git_print_header_div('summary', $project)
5787         }
5788         git_print_page_path($file_name, $ftype, $hash_base)
5789                 if (defined $file_name);
5790
5791         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5792                      $file_name, $file_hash, $ftype);
5793
5794         git_footer_html();
5795 }
5796
5797 sub git_log {
5798         git_log_generic('log', \&git_log_body,
5799                         $hash, $hash_parent);
5800 }
5801
5802 sub git_commit {
5803         $hash ||= $hash_base || "HEAD";
5804         my %co = parse_commit($hash)
5805             or die_error(404, "Unknown commit object");
5806
5807         my $parent  = $co{'parent'};
5808         my $parents = $co{'parents'}; # listref
5809
5810         # we need to prepare $formats_nav before any parameter munging
5811         my $formats_nav;
5812         if (!defined $parent) {
5813                 # --root commitdiff
5814                 $formats_nav .= '(initial)';
5815         } elsif (@$parents == 1) {
5816                 # single parent commit
5817                 $formats_nav .=
5818                         '(parent: ' .
5819                         $cgi->a({-href => href(action=>"commit",
5820                                                hash=>$parent)},
5821                                 esc_html(substr($parent, 0, 7))) .
5822                         ')';
5823         } else {
5824                 # merge commit
5825                 $formats_nav .=
5826                         '(merge: ' .
5827                         join(' ', map {
5828                                 $cgi->a({-href => href(action=>"commit",
5829                                                        hash=>$_)},
5830                                         esc_html(substr($_, 0, 7)));
5831                         } @$parents ) .
5832                         ')';
5833         }
5834         if (gitweb_check_feature('patches') && @$parents <= 1) {
5835                 $formats_nav .= " | " .
5836                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5837                                 "patch");
5838         }
5839
5840         if (!defined $parent) {
5841                 $parent = "--root";
5842         }
5843         my @difftree;
5844         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5845                 @diff_opts,
5846                 (@$parents <= 1 ? $parent : '-c'),
5847                 $hash, "--"
5848                 or die_error(500, "Open git-diff-tree failed");
5849         @difftree = map { chomp; $_ } <$fd>;
5850         close $fd or die_error(404, "Reading git-diff-tree failed");
5851
5852         # non-textual hash id's can be cached
5853         my $expires;
5854         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5855                 $expires = "+1d";
5856         }
5857         my $refs = git_get_references();
5858         my $ref = format_ref_marker($refs, $co{'id'});
5859
5860         git_header_html(undef, $expires);
5861         git_print_page_nav('commit', '',
5862                            $hash, $co{'tree'}, $hash,
5863                            $formats_nav);
5864
5865         if (defined $co{'parent'}) {
5866                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5867         } else {
5868                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5869         }
5870         print "<div class=\"title_text\">\n" .
5871               "<table class=\"object_header\">\n";
5872         git_print_authorship_rows(\%co);
5873         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5874         print "<tr>" .
5875               "<td>tree</td>" .
5876               "<td class=\"sha1\">" .
5877               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5878                        class => "list"}, $co{'tree'}) .
5879               "</td>" .
5880               "<td class=\"link\">" .
5881               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5882                       "tree");
5883         my $snapshot_links = format_snapshot_links($hash);
5884         if (defined $snapshot_links) {
5885                 print " | " . $snapshot_links;
5886         }
5887         print "</td>" .
5888               "</tr>\n";
5889
5890         foreach my $par (@$parents) {
5891                 print "<tr>" .
5892                       "<td>parent</td>" .
5893                       "<td class=\"sha1\">" .
5894                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5895                                class => "list"}, $par) .
5896                       "</td>" .
5897                       "<td class=\"link\">" .
5898                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5899                       " | " .
5900                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5901                       "</td>" .
5902                       "</tr>\n";
5903         }
5904         print "</table>".
5905               "</div>\n";
5906
5907         print "<div class=\"page_body\">\n";
5908         git_print_log($co{'comment'});
5909         print "</div>\n";
5910
5911         git_difftree_body(\@difftree, $hash, @$parents);
5912
5913         git_footer_html();
5914 }
5915
5916 sub git_object {
5917         # object is defined by:
5918         # - hash or hash_base alone
5919         # - hash_base and file_name
5920         my $type;
5921
5922         # - hash or hash_base alone
5923         if ($hash || ($hash_base && !defined $file_name)) {
5924                 my $object_id = $hash || $hash_base;
5925
5926                 open my $fd, "-|", quote_command(
5927                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5928                         or die_error(404, "Object does not exist");
5929                 $type = <$fd>;
5930                 chomp $type;
5931                 close $fd
5932                         or die_error(404, "Object does not exist");
5933
5934         # - hash_base and file_name
5935         } elsif ($hash_base && defined $file_name) {
5936                 $file_name =~ s,/+$,,;
5937
5938                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5939                         or die_error(404, "Base object does not exist");
5940
5941                 # here errors should not hapen
5942                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5943                         or die_error(500, "Open git-ls-tree failed");
5944                 my $line = <$fd>;
5945                 close $fd;
5946
5947                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5948                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5949                         die_error(404, "File or directory for given base does not exist");
5950                 }
5951                 $type = $2;
5952                 $hash = $3;
5953         } else {
5954                 die_error(400, "Not enough information to find object");
5955         }
5956
5957         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5958                                           hash=>$hash, hash_base=>$hash_base,
5959                                           file_name=>$file_name),
5960                              -status => '302 Found');
5961 }
5962
5963 sub git_blobdiff {
5964         my $format = shift || 'html';
5965
5966         my $fd;
5967         my @difftree;
5968         my %diffinfo;
5969         my $expires;
5970
5971         # preparing $fd and %diffinfo for git_patchset_body
5972         # new style URI
5973         if (defined $hash_base && defined $hash_parent_base) {
5974                 if (defined $file_name) {
5975                         # read raw output
5976                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5977                                 $hash_parent_base, $hash_base,
5978                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5979                                 or die_error(500, "Open git-diff-tree failed");
5980                         @difftree = map { chomp; $_ } <$fd>;
5981                         close $fd
5982                                 or die_error(404, "Reading git-diff-tree failed");
5983                         @difftree
5984                                 or die_error(404, "Blob diff not found");
5985
5986                 } elsif (defined $hash &&
5987                          $hash =~ /[0-9a-fA-F]{40}/) {
5988                         # try to find filename from $hash
5989
5990                         # read filtered raw output
5991                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5992                                 $hash_parent_base, $hash_base, "--"
5993                                 or die_error(500, "Open git-diff-tree failed");
5994                         @difftree =
5995                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5996                                 # $hash == to_id
5997                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5998                                 map { chomp; $_ } <$fd>;
5999                         close $fd
6000                                 or die_error(404, "Reading git-diff-tree failed");
6001                         @difftree
6002                                 or die_error(404, "Blob diff not found");
6003
6004                 } else {
6005                         die_error(400, "Missing one of the blob diff parameters");
6006                 }
6007
6008                 if (@difftree > 1) {
6009                         die_error(400, "Ambiguous blob diff specification");
6010                 }
6011
6012                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6013                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6014                 $file_name   ||= $diffinfo{'to_file'};
6015
6016                 $hash_parent ||= $diffinfo{'from_id'};
6017                 $hash        ||= $diffinfo{'to_id'};
6018
6019                 # non-textual hash id's can be cached
6020                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6021                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6022                         $expires = '+1d';
6023                 }
6024
6025                 # open patch output
6026                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6027                         '-p', ($format eq 'html' ? "--full-index" : ()),
6028                         $hash_parent_base, $hash_base,
6029                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6030                         or die_error(500, "Open git-diff-tree failed");
6031         }
6032
6033         # old/legacy style URI -- not generated anymore since 1.4.3.
6034         if (!%diffinfo) {
6035                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6036         }
6037
6038         # header
6039         if ($format eq 'html') {
6040                 my $formats_nav =
6041                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6042                                 "raw");
6043                 git_header_html(undef, $expires);
6044                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6045                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6046                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6047                 } else {
6048                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6049                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6050                 }
6051                 if (defined $file_name) {
6052                         git_print_page_path($file_name, "blob", $hash_base);
6053                 } else {
6054                         print "<div class=\"page_path\"></div>\n";
6055                 }
6056
6057         } elsif ($format eq 'plain') {
6058                 print $cgi->header(
6059                         -type => 'text/plain',
6060                         -charset => 'utf-8',
6061                         -expires => $expires,
6062                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6063
6064                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6065
6066         } else {
6067                 die_error(400, "Unknown blobdiff format");
6068         }
6069
6070         # patch
6071         if ($format eq 'html') {
6072                 print "<div class=\"page_body\">\n";
6073
6074                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6075                 close $fd;
6076
6077                 print "</div>\n"; # class="page_body"
6078                 git_footer_html();
6079
6080         } else {
6081                 while (my $line = <$fd>) {
6082                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6083                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6084
6085                         print $line;
6086
6087                         last if $line =~ m!^\+\+\+!;
6088                 }
6089                 local $/ = undef;
6090                 print <$fd>;
6091                 close $fd;
6092         }
6093 }
6094
6095 sub git_blobdiff_plain {
6096         git_blobdiff('plain');
6097 }
6098
6099 sub git_commitdiff {
6100         my %params = @_;
6101         my $format = $params{-format} || 'html';
6102
6103         my ($patch_max) = gitweb_get_feature('patches');
6104         if ($format eq 'patch') {
6105                 die_error(403, "Patch view not allowed") unless $patch_max;
6106         }
6107
6108         $hash ||= $hash_base || "HEAD";
6109         my %co = parse_commit($hash)
6110             or die_error(404, "Unknown commit object");
6111
6112         # choose format for commitdiff for merge
6113         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6114                 $hash_parent = '--cc';
6115         }
6116         # we need to prepare $formats_nav before almost any parameter munging
6117         my $formats_nav;
6118         if ($format eq 'html') {
6119                 $formats_nav =
6120                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6121                                 "raw");
6122                 if ($patch_max && @{$co{'parents'}} <= 1) {
6123                         $formats_nav .= " | " .
6124                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6125                                         "patch");
6126                 }
6127
6128                 if (defined $hash_parent &&
6129                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6130                         # commitdiff with two commits given
6131                         my $hash_parent_short = $hash_parent;
6132                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6133                                 $hash_parent_short = substr($hash_parent, 0, 7);
6134                         }
6135                         $formats_nav .=
6136                                 ' (from';
6137                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6138                                 if ($co{'parents'}[$i] eq $hash_parent) {
6139                                         $formats_nav .= ' parent ' . ($i+1);
6140                                         last;
6141                                 }
6142                         }
6143                         $formats_nav .= ': ' .
6144                                 $cgi->a({-href => href(action=>"commitdiff",
6145                                                        hash=>$hash_parent)},
6146                                         esc_html($hash_parent_short)) .
6147                                 ')';
6148                 } elsif (!$co{'parent'}) {
6149                         # --root commitdiff
6150                         $formats_nav .= ' (initial)';
6151                 } elsif (scalar @{$co{'parents'}} == 1) {
6152                         # single parent commit
6153                         $formats_nav .=
6154                                 ' (parent: ' .
6155                                 $cgi->a({-href => href(action=>"commitdiff",
6156                                                        hash=>$co{'parent'})},
6157                                         esc_html(substr($co{'parent'}, 0, 7))) .
6158                                 ')';
6159                 } else {
6160                         # merge commit
6161                         if ($hash_parent eq '--cc') {
6162                                 $formats_nav .= ' | ' .
6163                                         $cgi->a({-href => href(action=>"commitdiff",
6164                                                                hash=>$hash, hash_parent=>'-c')},
6165                                                 'combined');
6166                         } else { # $hash_parent eq '-c'
6167                                 $formats_nav .= ' | ' .
6168                                         $cgi->a({-href => href(action=>"commitdiff",
6169                                                                hash=>$hash, hash_parent=>'--cc')},
6170                                                 'compact');
6171                         }
6172                         $formats_nav .=
6173                                 ' (merge: ' .
6174                                 join(' ', map {
6175                                         $cgi->a({-href => href(action=>"commitdiff",
6176                                                                hash=>$_)},
6177                                                 esc_html(substr($_, 0, 7)));
6178                                 } @{$co{'parents'}} ) .
6179                                 ')';
6180                 }
6181         }
6182
6183         my $hash_parent_param = $hash_parent;
6184         if (!defined $hash_parent_param) {
6185                 # --cc for multiple parents, --root for parentless
6186                 $hash_parent_param =
6187                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6188         }
6189
6190         # read commitdiff
6191         my $fd;
6192         my @difftree;
6193         if ($format eq 'html') {
6194                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6195                         "--no-commit-id", "--patch-with-raw", "--full-index",
6196                         $hash_parent_param, $hash, "--"
6197                         or die_error(500, "Open git-diff-tree failed");
6198
6199                 while (my $line = <$fd>) {
6200                         chomp $line;
6201                         # empty line ends raw part of diff-tree output
6202                         last unless $line;
6203                         push @difftree, scalar parse_difftree_raw_line($line);
6204                 }
6205
6206         } elsif ($format eq 'plain') {
6207                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6208                         '-p', $hash_parent_param, $hash, "--"
6209                         or die_error(500, "Open git-diff-tree failed");
6210         } elsif ($format eq 'patch') {
6211                 # For commit ranges, we limit the output to the number of
6212                 # patches specified in the 'patches' feature.
6213                 # For single commits, we limit the output to a single patch,
6214                 # diverging from the git-format-patch default.
6215                 my @commit_spec = ();
6216                 if ($hash_parent) {
6217                         if ($patch_max > 0) {
6218                                 push @commit_spec, "-$patch_max";
6219                         }
6220                         push @commit_spec, '-n', "$hash_parent..$hash";
6221                 } else {
6222                         if ($params{-single}) {
6223                                 push @commit_spec, '-1';
6224                         } else {
6225                                 if ($patch_max > 0) {
6226                                         push @commit_spec, "-$patch_max";
6227                                 }
6228                                 push @commit_spec, "-n";
6229                         }
6230                         push @commit_spec, '--root', $hash;
6231                 }
6232                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6233                         '--stdout', @commit_spec
6234                         or die_error(500, "Open git-format-patch failed");
6235         } else {
6236                 die_error(400, "Unknown commitdiff format");
6237         }
6238
6239         # non-textual hash id's can be cached
6240         my $expires;
6241         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6242                 $expires = "+1d";
6243         }
6244
6245         # write commit message
6246         if ($format eq 'html') {
6247                 my $refs = git_get_references();
6248                 my $ref = format_ref_marker($refs, $co{'id'});
6249
6250                 git_header_html(undef, $expires);
6251                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6252                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6253                 print "<div class=\"title_text\">\n" .
6254                       "<table class=\"object_header\">\n";
6255                 git_print_authorship_rows(\%co);
6256                 print "</table>".
6257                       "</div>\n";
6258                 print "<div class=\"page_body\">\n";
6259                 if (@{$co{'comment'}} > 1) {
6260                         print "<div class=\"log\">\n";
6261                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6262                         print "</div>\n"; # class="log"
6263                 }
6264
6265         } elsif ($format eq 'plain') {
6266                 my $refs = git_get_references("tags");
6267                 my $tagname = git_get_rev_name_tags($hash);
6268                 my $filename = basename($project) . "-$hash.patch";
6269
6270                 print $cgi->header(
6271                         -type => 'text/plain',
6272                         -charset => 'utf-8',
6273                         -expires => $expires,
6274                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6275                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6276                 print "From: " . to_utf8($co{'author'}) . "\n";
6277                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6278                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6279
6280                 print "X-Git-Tag: $tagname\n" if $tagname;
6281                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6282
6283                 foreach my $line (@{$co{'comment'}}) {
6284                         print to_utf8($line) . "\n";
6285                 }
6286                 print "---\n\n";
6287         } elsif ($format eq 'patch') {
6288                 my $filename = basename($project) . "-$hash.patch";
6289
6290                 print $cgi->header(
6291                         -type => 'text/plain',
6292                         -charset => 'utf-8',
6293                         -expires => $expires,
6294                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6295         }
6296
6297         # write patch
6298         if ($format eq 'html') {
6299                 my $use_parents = !defined $hash_parent ||
6300                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6301                 git_difftree_body(\@difftree, $hash,
6302                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6303                 print "<br/>\n";
6304
6305                 git_patchset_body($fd, \@difftree, $hash,
6306                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6307                 close $fd;
6308                 print "</div>\n"; # class="page_body"
6309                 git_footer_html();
6310
6311         } elsif ($format eq 'plain') {
6312                 local $/ = undef;
6313                 print <$fd>;
6314                 close $fd
6315                         or print "Reading git-diff-tree failed\n";
6316         } elsif ($format eq 'patch') {
6317                 local $/ = undef;
6318                 print <$fd>;
6319                 close $fd
6320                         or print "Reading git-format-patch failed\n";
6321         }
6322 }
6323
6324 sub git_commitdiff_plain {
6325         git_commitdiff(-format => 'plain');
6326 }
6327
6328 # format-patch-style patches
6329 sub git_patch {
6330         git_commitdiff(-format => 'patch', -single => 1);
6331 }
6332
6333 sub git_patches {
6334         git_commitdiff(-format => 'patch');
6335 }
6336
6337 sub git_history {
6338         git_log_generic('history', \&git_history_body,
6339                         $hash_base, $hash_parent_base,
6340                         $file_name, $hash);
6341 }
6342
6343 sub git_search {
6344         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6345         if (!defined $searchtext) {
6346                 die_error(400, "Text field is empty");
6347         }
6348         if (!defined $hash) {
6349                 $hash = git_get_head_hash($project);
6350         }
6351         my %co = parse_commit($hash);
6352         if (!%co) {
6353                 die_error(404, "Unknown commit object");
6354         }
6355         if (!defined $page) {
6356                 $page = 0;
6357         }
6358
6359         $searchtype ||= 'commit';
6360         if ($searchtype eq 'pickaxe') {
6361                 # pickaxe may take all resources of your box and run for several minutes
6362                 # with every query - so decide by yourself how public you make this feature
6363                 gitweb_check_feature('pickaxe')
6364                     or die_error(403, "Pickaxe is disabled");
6365         }
6366         if ($searchtype eq 'grep') {
6367                 gitweb_check_feature('grep')
6368                     or die_error(403, "Grep is disabled");
6369         }
6370
6371         git_header_html();
6372
6373         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6374                 my $greptype;
6375                 if ($searchtype eq 'commit') {
6376                         $greptype = "--grep=";
6377                 } elsif ($searchtype eq 'author') {
6378                         $greptype = "--author=";
6379                 } elsif ($searchtype eq 'committer') {
6380                         $greptype = "--committer=";
6381                 }
6382                 $greptype .= $searchtext;
6383                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6384                                                $greptype, '--regexp-ignore-case',
6385                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6386
6387                 my $paging_nav = '';
6388                 if ($page > 0) {
6389                         $paging_nav .=
6390                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6391                                                        searchtext=>$searchtext,
6392                                                        searchtype=>$searchtype)},
6393                                         "first");
6394                         $paging_nav .= " &sdot; " .
6395                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6396                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6397                 } else {
6398                         $paging_nav .= "first";
6399                         $paging_nav .= " &sdot; prev";
6400                 }
6401                 my $next_link = '';
6402                 if ($#commitlist >= 100) {
6403                         $next_link =
6404                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6405                                          -accesskey => "n", -title => "Alt-n"}, "next");
6406                         $paging_nav .= " &sdot; $next_link";
6407                 } else {
6408                         $paging_nav .= " &sdot; next";
6409                 }
6410
6411                 if ($#commitlist >= 100) {
6412                 }
6413
6414                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6415                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6416                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6417         }
6418
6419         if ($searchtype eq 'pickaxe') {
6420                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6421                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6422
6423                 print "<table class=\"pickaxe search\">\n";
6424                 my $alternate = 1;
6425                 local $/ = "\n";
6426                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6427                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6428                         ($search_use_regexp ? '--pickaxe-regex' : ());
6429                 undef %co;
6430                 my @files;
6431                 while (my $line = <$fd>) {
6432                         chomp $line;
6433                         next unless $line;
6434
6435                         my %set = parse_difftree_raw_line($line);
6436                         if (defined $set{'commit'}) {
6437                                 # finish previous commit
6438                                 if (%co) {
6439                                         print "</td>\n" .
6440                                               "<td class=\"link\">" .
6441                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6442                                               " | " .
6443                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6444                                         print "</td>\n" .
6445                                               "</tr>\n";
6446                                 }
6447
6448                                 if ($alternate) {
6449                                         print "<tr class=\"dark\">\n";
6450                                 } else {
6451                                         print "<tr class=\"light\">\n";
6452                                 }
6453                                 $alternate ^= 1;
6454                                 %co = parse_commit($set{'commit'});
6455                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6456                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6457                                       "<td><i>$author</i></td>\n" .
6458                                       "<td>" .
6459                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6460                                               -class => "list subject"},
6461                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6462                         } elsif (defined $set{'to_id'}) {
6463                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6464
6465                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6466                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6467                                               -class => "list"},
6468                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6469                                       "<br/>\n";
6470                         }
6471                 }
6472                 close $fd;
6473
6474                 # finish last commit (warning: repetition!)
6475                 if (%co) {
6476                         print "</td>\n" .
6477                               "<td class=\"link\">" .
6478                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6479                               " | " .
6480                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6481                         print "</td>\n" .
6482                               "</tr>\n";
6483                 }
6484
6485                 print "</table>\n";
6486         }
6487
6488         if ($searchtype eq 'grep') {
6489                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6490                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6491
6492                 print "<table class=\"grep_search\">\n";
6493                 my $alternate = 1;
6494                 my $matches = 0;
6495                 local $/ = "\n";
6496                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6497                         $search_use_regexp ? ('-E', '-i') : '-F',
6498                         $searchtext, $co{'tree'};
6499                 my $lastfile = '';
6500                 while (my $line = <$fd>) {
6501                         chomp $line;
6502                         my ($file, $lno, $ltext, $binary);
6503                         last if ($matches++ > 1000);
6504                         if ($line =~ /^Binary file (.+) matches$/) {
6505                                 $file = $1;
6506                                 $binary = 1;
6507                         } else {
6508                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6509                         }
6510                         if ($file ne $lastfile) {
6511                                 $lastfile and print "</td></tr>\n";
6512                                 if ($alternate++) {
6513                                         print "<tr class=\"dark\">\n";
6514                                 } else {
6515                                         print "<tr class=\"light\">\n";
6516                                 }
6517                                 print "<td class=\"list\">".
6518                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6519                                                                file_name=>"$file"),
6520                                                 -class => "list"}, esc_path($file));
6521                                 print "</td><td>\n";
6522                                 $lastfile = $file;
6523                         }
6524                         if ($binary) {
6525                                 print "<div class=\"binary\">Binary file</div>\n";
6526                         } else {
6527                                 $ltext = untabify($ltext);
6528                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6529                                         $ltext = esc_html($1, -nbsp=>1);
6530                                         $ltext .= '<span class="match">';
6531                                         $ltext .= esc_html($2, -nbsp=>1);
6532                                         $ltext .= '</span>';
6533                                         $ltext .= esc_html($3, -nbsp=>1);
6534                                 } else {
6535                                         $ltext = esc_html($ltext, -nbsp=>1);
6536                                 }
6537                                 print "<div class=\"pre\">" .
6538                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6539                                                                file_name=>"$file").'#l'.$lno,
6540                                                 -class => "linenr"}, sprintf('%4i', $lno))
6541                                         . ' ' .  $ltext . "</div>\n";
6542                         }
6543                 }
6544                 if ($lastfile) {
6545                         print "</td></tr>\n";
6546                         if ($matches > 1000) {
6547                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6548                         }
6549                 } else {
6550                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6551                 }
6552                 close $fd;
6553
6554                 print "</table>\n";
6555         }
6556         git_footer_html();
6557 }
6558
6559 sub git_search_help {
6560         git_header_html();
6561         git_print_page_nav('','', $hash,$hash,$hash);
6562         print <<EOT;
6563 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6564 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6565 the pattern entered is recognized as the POSIX extended
6566 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6567 insensitive).</p>
6568 <dl>
6569 <dt><b>commit</b></dt>
6570 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6571 EOT
6572         my $have_grep = gitweb_check_feature('grep');
6573         if ($have_grep) {
6574                 print <<EOT;
6575 <dt><b>grep</b></dt>
6576 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6577     a different one) are searched for the given pattern. On large trees, this search can take
6578 a while and put some strain on the server, so please use it with some consideration. Note that
6579 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6580 case-sensitive.</dd>
6581 EOT
6582         }
6583         print <<EOT;
6584 <dt><b>author</b></dt>
6585 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6586 <dt><b>committer</b></dt>
6587 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6588 EOT
6589         my $have_pickaxe = gitweb_check_feature('pickaxe');
6590         if ($have_pickaxe) {
6591                 print <<EOT;
6592 <dt><b>pickaxe</b></dt>
6593 <dd>All commits that caused the string to appear or disappear from any file (changes that
6594 added, removed or "modified" the string) will be listed. This search can take a while and
6595 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6596 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6597 EOT
6598         }
6599         print "</dl>\n";
6600         git_footer_html();
6601 }
6602
6603 sub git_shortlog {
6604         git_log_generic('shortlog', \&git_shortlog_body,
6605                         $hash, $hash_parent);
6606 }
6607
6608 ## ......................................................................
6609 ## feeds (RSS, Atom; OPML)
6610
6611 sub git_feed {
6612         my $format = shift || 'atom';
6613         my $have_blame = gitweb_check_feature('blame');
6614
6615         # Atom: http://www.atomenabled.org/developers/syndication/
6616         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6617         if ($format ne 'rss' && $format ne 'atom') {
6618                 die_error(400, "Unknown web feed format");
6619         }
6620
6621         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6622         my $head = $hash || 'HEAD';
6623         my @commitlist = parse_commits($head, 150, 0, $file_name);
6624
6625         my %latest_commit;
6626         my %latest_date;
6627         my $content_type = "application/$format+xml";
6628         if (defined $cgi->http('HTTP_ACCEPT') &&
6629                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6630                 # browser (feed reader) prefers text/xml
6631                 $content_type = 'text/xml';
6632         }
6633         if (defined($commitlist[0])) {
6634                 %latest_commit = %{$commitlist[0]};
6635                 my $latest_epoch = $latest_commit{'committer_epoch'};
6636                 %latest_date   = parse_date($latest_epoch);
6637                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6638                 if (defined $if_modified) {
6639                         my $since;
6640                         if (eval { require HTTP::Date; 1; }) {
6641                                 $since = HTTP::Date::str2time($if_modified);
6642                         } elsif (eval { require Time::ParseDate; 1; }) {
6643                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6644                         }
6645                         if (defined $since && $latest_epoch <= $since) {
6646                                 print $cgi->header(
6647                                         -type => $content_type,
6648                                         -charset => 'utf-8',
6649                                         -last_modified => $latest_date{'rfc2822'},
6650                                         -status => '304 Not Modified');
6651                                 return;
6652                         }
6653                 }
6654                 print $cgi->header(
6655                         -type => $content_type,
6656                         -charset => 'utf-8',
6657                         -last_modified => $latest_date{'rfc2822'});
6658         } else {
6659                 print $cgi->header(
6660                         -type => $content_type,
6661                         -charset => 'utf-8');
6662         }
6663
6664         # Optimization: skip generating the body if client asks only
6665         # for Last-Modified date.
6666         return if ($cgi->request_method() eq 'HEAD');
6667
6668         # header variables
6669         my $title = "$site_name - $project/$action";
6670         my $feed_type = 'log';
6671         if (defined $hash) {
6672                 $title .= " - '$hash'";
6673                 $feed_type = 'branch log';
6674                 if (defined $file_name) {
6675                         $title .= " :: $file_name";
6676                         $feed_type = 'history';
6677                 }
6678         } elsif (defined $file_name) {
6679                 $title .= " - $file_name";
6680                 $feed_type = 'history';
6681         }
6682         $title .= " $feed_type";
6683         my $descr = git_get_project_description($project);
6684         if (defined $descr) {
6685                 $descr = esc_html($descr);
6686         } else {
6687                 $descr = "$project " .
6688                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6689                          " feed";
6690         }
6691         my $owner = git_get_project_owner($project);
6692         $owner = esc_html($owner);
6693
6694         #header
6695         my $alt_url;
6696         if (defined $file_name) {
6697                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6698         } elsif (defined $hash) {
6699                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6700         } else {
6701                 $alt_url = href(-full=>1, action=>"summary");
6702         }
6703         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6704         if ($format eq 'rss') {
6705                 print <<XML;
6706 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6707 <channel>
6708 XML
6709                 print "<title>$title</title>\n" .
6710                       "<link>$alt_url</link>\n" .
6711                       "<description>$descr</description>\n" .
6712                       "<language>en</language>\n" .
6713                       # project owner is responsible for 'editorial' content
6714                       "<managingEditor>$owner</managingEditor>\n";
6715                 if (defined $logo || defined $favicon) {
6716                         # prefer the logo to the favicon, since RSS
6717                         # doesn't allow both
6718                         my $img = esc_url($logo || $favicon);
6719                         print "<image>\n" .
6720                               "<url>$img</url>\n" .
6721                               "<title>$title</title>\n" .
6722                               "<link>$alt_url</link>\n" .
6723                               "</image>\n";
6724                 }
6725                 if (%latest_date) {
6726                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6727                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6728                 }
6729                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6730         } elsif ($format eq 'atom') {
6731                 print <<XML;
6732 <feed xmlns="http://www.w3.org/2005/Atom">
6733 XML
6734                 print "<title>$title</title>\n" .
6735                       "<subtitle>$descr</subtitle>\n" .
6736                       '<link rel="alternate" type="text/html" href="' .
6737                       $alt_url . '" />' . "\n" .
6738                       '<link rel="self" type="' . $content_type . '" href="' .
6739                       $cgi->self_url() . '" />' . "\n" .
6740                       "<id>" . href(-full=>1) . "</id>\n" .
6741                       # use project owner for feed author
6742                       "<author><name>$owner</name></author>\n";
6743                 if (defined $favicon) {
6744                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6745                 }
6746                 if (defined $logo_url) {
6747                         # not twice as wide as tall: 72 x 27 pixels
6748                         print "<logo>" . esc_url($logo) . "</logo>\n";
6749                 }
6750                 if (! %latest_date) {
6751                         # dummy date to keep the feed valid until commits trickle in:
6752                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6753                 } else {
6754                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6755                 }
6756                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6757         }
6758
6759         # contents
6760         for (my $i = 0; $i <= $#commitlist; $i++) {
6761                 my %co = %{$commitlist[$i]};
6762                 my $commit = $co{'id'};
6763                 # we read 150, we always show 30 and the ones more recent than 48 hours
6764                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6765                         last;
6766                 }
6767                 my %cd = parse_date($co{'author_epoch'});
6768
6769                 # get list of changed files
6770                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6771                         $co{'parent'} || "--root",
6772                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6773                         or next;
6774                 my @difftree = map { chomp; $_ } <$fd>;
6775                 close $fd
6776                         or next;
6777
6778                 # print element (entry, item)
6779                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6780                 if ($format eq 'rss') {
6781                         print "<item>\n" .
6782                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6783                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6784                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6785                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6786                               "<link>$co_url</link>\n" .
6787                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6788                               "<content:encoded>" .
6789                               "<![CDATA[\n";
6790                 } elsif ($format eq 'atom') {
6791                         print "<entry>\n" .
6792                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6793                               "<updated>$cd{'iso-8601'}</updated>\n" .
6794                               "<author>\n" .
6795                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6796                         if ($co{'author_email'}) {
6797                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6798                         }
6799                         print "</author>\n" .
6800                               # use committer for contributor
6801                               "<contributor>\n" .
6802                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6803                         if ($co{'committer_email'}) {
6804                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6805                         }
6806                         print "</contributor>\n" .
6807                               "<published>$cd{'iso-8601'}</published>\n" .
6808                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6809                               "<id>$co_url</id>\n" .
6810                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6811                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6812                 }
6813                 my $comment = $co{'comment'};
6814                 print "<pre>\n";
6815                 foreach my $line (@$comment) {
6816                         $line = esc_html($line);
6817                         print "$line\n";
6818                 }
6819                 print "</pre><ul>\n";
6820                 foreach my $difftree_line (@difftree) {
6821                         my %difftree = parse_difftree_raw_line($difftree_line);
6822                         next if !$difftree{'from_id'};
6823
6824                         my $file = $difftree{'file'} || $difftree{'to_file'};
6825
6826                         print "<li>" .
6827                               "[" .
6828                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6829                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6830                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6831                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6832                                       -title => "diff"}, 'D');
6833                         if ($have_blame) {
6834                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6835                                                              file_name=>$file, hash_base=>$commit),
6836                                               -title => "blame"}, 'B');
6837                         }
6838                         # if this is not a feed of a file history
6839                         if (!defined $file_name || $file_name ne $file) {
6840                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6841                                                              file_name=>$file, hash=>$commit),
6842                                               -title => "history"}, 'H');
6843                         }
6844                         $file = esc_path($file);
6845                         print "] ".
6846                               "$file</li>\n";
6847                 }
6848                 if ($format eq 'rss') {
6849                         print "</ul>]]>\n" .
6850                               "</content:encoded>\n" .
6851                               "</item>\n";
6852                 } elsif ($format eq 'atom') {
6853                         print "</ul>\n</div>\n" .
6854                               "</content>\n" .
6855                               "</entry>\n";
6856                 }
6857         }
6858
6859         # end of feed
6860         if ($format eq 'rss') {
6861                 print "</channel>\n</rss>\n";
6862         } elsif ($format eq 'atom') {
6863                 print "</feed>\n";
6864         }
6865 }
6866
6867 sub git_rss {
6868         git_feed('rss');
6869 }
6870
6871 sub git_atom {
6872         git_feed('atom');
6873 }
6874
6875 sub git_opml {
6876         my @list = git_get_projects_list();
6877
6878         print $cgi->header(
6879                 -type => 'text/xml',
6880                 -charset => 'utf-8',
6881                 -content_disposition => 'inline; filename="opml.xml"');
6882
6883         print <<XML;
6884 <?xml version="1.0" encoding="utf-8"?>
6885 <opml version="1.0">
6886 <head>
6887   <title>$site_name OPML Export</title>
6888 </head>
6889 <body>
6890 <outline text="git RSS feeds">
6891 XML
6892
6893         foreach my $pr (@list) {
6894                 my %proj = %$pr;
6895                 my $head = git_get_head_hash($proj{'path'});
6896                 if (!defined $head) {
6897                         next;
6898                 }
6899                 $git_dir = "$projectroot/$proj{'path'}";
6900                 my %co = parse_commit($head);
6901                 if (!%co) {
6902                         next;
6903                 }
6904
6905                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6906                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6907                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6908                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6909         }
6910         print <<XML;
6911 </outline>
6912 </body>
6913 </opml>
6914 XML
6915 }