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

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