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         # $feature{'avatar'}{'override'} = 1;
 424         # and in project config gitweb.avatar = <provider>;
 425         'avatar' => {
 426                 'sub' => \&feature_avatar,
 427                 'override' => 0,
 428                 'default' => ['']},
 429
 430         # Enable displaying how much time and how many git commands
 431         # it took to generate and display page.  Disabled by default.
 432         # Project specific override is not supported.
 433         'timed' => {
 434                 'override' => 0,
 435                 'default' => [0]},
 436 );
 437
 438 sub gitweb_get_feature {
 439         my ($name) = @_;
 440         return unless exists $feature{$name};
 441         my ($sub, $override, @defaults) = (
 442                 $feature{$name}{'sub'},
 443                 $feature{$name}{'override'},
 444                 @{$feature{$name}{'default'}});
 445         if (!$override) { return @defaults; }
 446         if (!defined $sub) {
 447                 warn "feature $name is not overridable";
 448                 return @defaults;
 449         }
 450         return $sub->(@defaults);
 451 }
 452
 453 # A wrapper to check if a given feature is enabled.
 454 # With this, you can say
 455 #
 456 #   my $bool_feat = gitweb_check_feature('bool_feat');
 457 #   gitweb_check_feature('bool_feat') or somecode;
 458 #
 459 # instead of
 460 #
 461 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 462 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 463 #
 464 sub gitweb_check_feature {
 465         return (gitweb_get_feature(@_))[0];
 466 }
 467
 468
 469 sub feature_bool {
 470         my $key = shift;
 471         my ($val) = git_get_project_config($key, '--bool');
 472
 473         if (!defined $val) {
 474                 return ($_[0]);
 475         } elsif ($val eq 'true') {
 476                 return (1);
 477         } elsif ($val eq 'false') {
 478                 return (0);
 479         }
 480 }
 481
 482 sub feature_snapshot {
 483         my (@fmts) = @_;
 484
 485         my ($val) = git_get_project_config('snapshot');
 486
 487         if ($val) {
 488                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 489         }
 490
 491         return @fmts;
 492 }
 493
 494 sub feature_patches {
 495         my @val = (git_get_project_config('patches', '--int'));
 496
 497         if (@val) {
 498                 return @val;
 499         }
 500
 501         return ($_[0]);
 502 }
 503
 504 sub feature_avatar {
 505         my @val = (git_get_project_config('avatar'));
 506
 507         return @val ? @val : @_;
 508 }
 509
 510 # checking HEAD file with -e is fragile if the repository was
 511 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 512 # and then pruned.
 513 sub check_head_link {
 514         my ($dir) = @_;
 515         my $headfile = "$dir/HEAD";
 516         return ((-e $headfile) ||
 517                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 518 }
 519
 520 sub check_export_ok {
 521         my ($dir) = @_;
 522         return (check_head_link($dir) &&
 523                 (!$export_ok || -e "$dir/$export_ok") &&
 524                 (!$export_auth_hook || $export_auth_hook->($dir)));
 525 }
 526
 527 # process alternate names for backward compatibility
 528 # filter out unsupported (unknown) snapshot formats
 529 sub filter_snapshot_fmts {
 530         my @fmts = @_;
 531
 532         @fmts = map {
 533                 exists $known_snapshot_format_aliases{$_} ?
 534                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 535         @fmts = grep {
 536                 exists $known_snapshot_formats{$_} &&
 537                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 538 }
 539
 540 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 541 if (-e $GITWEB_CONFIG) {
 542         do $GITWEB_CONFIG;
 543 } else {
 544         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 545         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 546 }
 547
 548 # version of the core git binary
 549 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 550 $number_of_git_cmds++;
 551
 552 $projects_list ||= $projectroot;
 553
 554 # ======================================================================
 555 # input validation and dispatch
 556
 557 # input parameters can be collected from a variety of sources (presently, CGI
 558 # and PATH_INFO), so we define an %input_params hash that collects them all
 559 # together during validation: this allows subsequent uses (e.g. href()) to be
 560 # agnostic of the parameter origin
 561
 562 our %input_params = ();
 563
 564 # input parameters are stored with the long parameter name as key. This will
 565 # also be used in the href subroutine to convert parameters to their CGI
 566 # equivalent, and since the href() usage is the most frequent one, we store
 567 # the name -> CGI key mapping here, instead of the reverse.
 568 #
 569 # XXX: Warning: If you touch this, check the search form for updating,
 570 # too.
 571
 572 our @cgi_param_mapping = (
 573         project => "p",
 574         action => "a",
 575         file_name => "f",
 576         file_parent => "fp",
 577         hash => "h",
 578         hash_parent => "hp",
 579         hash_base => "hb",
 580         hash_parent_base => "hpb",
 581         page => "pg",
 582         order => "o",
 583         searchtext => "s",
 584         searchtype => "st",
 585         snapshot_format => "sf",
 586         extra_options => "opt",
 587         search_use_regexp => "sr",
 588         # this must be last entry (for manipulation from JavaScript)
 589         javascript => "js"
 590 );
 591 our %cgi_param_mapping = @cgi_param_mapping;
 592
 593 # we will also need to know the possible actions, for validation
 594 our %actions = (
 595         "blame" => \&git_blame,
 596         "blame_incremental" => \&git_blame_incremental,
 597         "blame_data" => \&git_blame_data,
 598         "blobdiff" => \&git_blobdiff,
 599         "blobdiff_plain" => \&git_blobdiff_plain,
 600         "blob" => \&git_blob,
 601         "blob_plain" => \&git_blob_plain,
 602         "commitdiff" => \&git_commitdiff,
 603         "commitdiff_plain" => \&git_commitdiff_plain,
 604         "commit" => \&git_commit,
 605         "forks" => \&git_forks,
 606         "heads" => \&git_heads,
 607         "history" => \&git_history,
 608         "log" => \&git_log,
 609         "patch" => \&git_patch,
 610         "patches" => \&git_patches,
 611         "rss" => \&git_rss,
 612         "atom" => \&git_atom,
 613         "search" => \&git_search,
 614         "search_help" => \&git_search_help,
 615         "shortlog" => \&git_shortlog,
 616         "summary" => \&git_summary,
 617         "tag" => \&git_tag,
 618         "tags" => \&git_tags,
 619         "tree" => \&git_tree,
 620         "snapshot" => \&git_snapshot,
 621         "object" => \&git_object,
 622         # those below don't need $project
 623         "opml" => \&git_opml,
 624         "project_list" => \&git_project_list,
 625         "project_index" => \&git_project_index,
 626 );
 627
 628 # finally, we have the hash of allowed extra_options for the commands that
 629 # allow them
 630 our %allowed_options = (
 631         "--no-merges" => [ qw(rss atom log shortlog history) ],
 632 );
 633
 634 # fill %input_params with the CGI parameters. All values except for 'opt'
 635 # should be single values, but opt can be an array. We should probably
 636 # build an array of parameters that can be multi-valued, but since for the time
 637 # being it's only this one, we just single it out
 638 while (my ($name, $symbol) = each %cgi_param_mapping) {
 639         if ($symbol eq 'opt') {
 640                 $input_params{$name} = [ $cgi->param($symbol) ];
 641         } else {
 642                 $input_params{$name} = $cgi->param($symbol);
 643         }
 644 }
 645
 646 # now read PATH_INFO and update the parameter list for missing parameters
 647 sub evaluate_path_info {
 648         return if defined $input_params{'project'};
 649         return if !$path_info;
 650         $path_info =~ s,^/+,,;
 651         return if !$path_info;
 652
 653         # find which part of PATH_INFO is project
 654         my $project = $path_info;
 655         $project =~ s,/+$,,;
 656         while ($project && !check_head_link("$projectroot/$project")) {
 657                 $project =~ s,/*[^/]*$,,;
 658         }
 659         return unless $project;
 660         $input_params{'project'} = $project;
 661
 662         # do not change any parameters if an action is given using the query string
 663         return if $input_params{'action'};
 664         $path_info =~ s,^\Q$project\E/*,,;
 665
 666         # next, check if we have an action
 667         my $action = $path_info;
 668         $action =~ s,/.*$,,;
 669         if (exists $actions{$action}) {
 670                 $path_info =~ s,^$action/*,,;
 671                 $input_params{'action'} = $action;
 672         }
 673
 674         # list of actions that want hash_base instead of hash, but can have no
 675         # pathname (f) parameter
 676         my @wants_base = (
 677                 'tree',
 678                 'history',
 679         );
 680
 681         # we want to catch
 682         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 683         my ($parentrefname, $parentpathname, $refname, $pathname) =
 684                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 685
 686         # first, analyze the 'current' part
 687         if (defined $pathname) {
 688                 # we got "branch:filename" or "branch:dir/"
 689                 # we could use git_get_type(branch:pathname), but:
 690                 # - it needs $git_dir
 691                 # - it does a git() call
 692                 # - the convention of terminating directories with a slash
 693                 #   makes it superfluous
 694                 # - embedding the action in the PATH_INFO would make it even
 695                 #   more superfluous
 696                 $pathname =~ s,^/+,,;
 697                 if (!$pathname || substr($pathname, -1) eq "/") {
 698                         $input_params{'action'} ||= "tree";
 699                         $pathname =~ s,/$,,;
 700                 } else {
 701                         # the default action depends on whether we had parent info
 702                         # or not
 703                         if ($parentrefname) {
 704                                 $input_params{'action'} ||= "blobdiff_plain";
 705                         } else {
 706                                 $input_params{'action'} ||= "blob_plain";
 707                         }
 708                 }
 709                 $input_params{'hash_base'} ||= $refname;
 710                 $input_params{'file_name'} ||= $pathname;
 711         } elsif (defined $refname) {
 712                 # we got "branch". In this case we have to choose if we have to
 713                 # set hash or hash_base.
 714                 #
 715                 # Most of the actions without a pathname only want hash to be
 716                 # set, except for the ones specified in @wants_base that want
 717                 # hash_base instead. It should also be noted that hand-crafted
 718                 # links having 'history' as an action and no pathname or hash
 719                 # set will fail, but that happens regardless of PATH_INFO.
 720                 $input_params{'action'} ||= "shortlog";
 721                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 722                         $input_params{'hash_base'} ||= $refname;
 723                 } else {
 724                         $input_params{'hash'} ||= $refname;
 725                 }
 726         }
 727
 728         # next, handle the 'parent' part, if present
 729         if (defined $parentrefname) {
 730                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 731                 # someproject/blobdiff/oldrev..newrev:/filename
 732                 if ($parentpathname) {
 733                         $parentpathname =~ s,^/+,,;
 734                         $parentpathname =~ s,/$,,;
 735                         $input_params{'file_parent'} ||= $parentpathname;
 736                 } else {
 737                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 738                 }
 739                 # we assume that hash_parent_base is wanted if a path was specified,
 740                 # or if the action wants hash_base instead of hash
 741                 if (defined $input_params{'file_parent'} ||
 742                         grep { $_ eq $input_params{'action'} } @wants_base) {
 743                         $input_params{'hash_parent_base'} ||= $parentrefname;
 744                 } else {
 745                         $input_params{'hash_parent'} ||= $parentrefname;
 746                 }
 747         }
 748
 749         # for the snapshot action, we allow URLs in the form
 750         # $project/snapshot/$hash.ext
 751         # where .ext determines the snapshot and gets removed from the
 752         # passed $refname to provide the $hash.
 753         #
 754         # To be able to tell that $refname includes the format extension, we
 755         # require the following two conditions to be satisfied:
 756         # - the hash input parameter MUST have been set from the $refname part
 757         #   of the URL (i.e. they must be equal)
 758         # - the snapshot format MUST NOT have been defined already (e.g. from
 759         #   CGI parameter sf)
 760         # It's also useless to try any matching unless $refname has a dot,
 761         # so we check for that too
 762         if (defined $input_params{'action'} &&
 763                 $input_params{'action'} eq 'snapshot' &&
 764                 defined $refname && index($refname, '.') != -1 &&
 765                 $refname eq $input_params{'hash'} &&
 766                 !defined $input_params{'snapshot_format'}) {
 767                 # We loop over the known snapshot formats, checking for
 768                 # extensions. Allowed extensions are both the defined suffix
 769                 # (which includes the initial dot already) and the snapshot
 770                 # format key itself, with a prepended dot
 771                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 772                         my $hash = $refname;
 773                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 774                                 next;
 775                         }
 776                         my $sfx = $1;
 777                         # a valid suffix was found, so set the snapshot format
 778                         # and reset the hash parameter
 779                         $input_params{'snapshot_format'} = $fmt;
 780                         $input_params{'hash'} = $hash;
 781                         # we also set the format suffix to the one requested
 782                         # in the URL: this way a request for e.g. .tgz returns
 783                         # a .tgz instead of a .tar.gz
 784                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 785                         last;
 786                 }
 787         }
 788 }
 789 evaluate_path_info();
 790
 791 our $action = $input_params{'action'};
 792 if (defined $action) {
 793         if (!validate_action($action)) {
 794                 die_error(400, "Invalid action parameter");
 795         }
 796 }
 797
 798 # parameters which are pathnames
 799 our $project = $input_params{'project'};
 800 if (defined $project) {
 801         if (!validate_project($project)) {
 802                 undef $project;
 803                 die_error(404, "No such project");
 804         }
 805 }
 806
 807 our $file_name = $input_params{'file_name'};
 808 if (defined $file_name) {
 809         if (!validate_pathname($file_name)) {
 810                 die_error(400, "Invalid file parameter");
 811         }
 812 }
 813
 814 our $file_parent = $input_params{'file_parent'};
 815 if (defined $file_parent) {
 816         if (!validate_pathname($file_parent)) {
 817                 die_error(400, "Invalid file parent parameter");
 818         }
 819 }
 820
 821 # parameters which are refnames
 822 our $hash = $input_params{'hash'};
 823 if (defined $hash) {
 824         if (!validate_refname($hash)) {
 825                 die_error(400, "Invalid hash parameter");
 826         }
 827 }
 828
 829 our $hash_parent = $input_params{'hash_parent'};
 830 if (defined $hash_parent) {
 831         if (!validate_refname($hash_parent)) {
 832                 die_error(400, "Invalid hash parent parameter");
 833         }
 834 }
 835
 836 our $hash_base = $input_params{'hash_base'};
 837 if (defined $hash_base) {
 838         if (!validate_refname($hash_base)) {
 839                 die_error(400, "Invalid hash base parameter");
 840         }
 841 }
 842
 843 our @extra_options = @{$input_params{'extra_options'}};
 844 # @extra_options is always defined, since it can only be (currently) set from
 845 # CGI, and $cgi->param() returns the empty array in array context if the param
 846 # is not set
 847 foreach my $opt (@extra_options) {
 848         if (not exists $allowed_options{$opt}) {
 849                 die_error(400, "Invalid option parameter");
 850         }
 851         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 852                 die_error(400, "Invalid option parameter for this action");
 853         }
 854 }
 855
 856 our $hash_parent_base = $input_params{'hash_parent_base'};
 857 if (defined $hash_parent_base) {
 858         if (!validate_refname($hash_parent_base)) {
 859                 die_error(400, "Invalid hash parent base parameter");
 860         }
 861 }
 862
 863 # other parameters
 864 our $page = $input_params{'page'};
 865 if (defined $page) {
 866         if ($page =~ m/[^0-9]/) {
 867                 die_error(400, "Invalid page parameter");
 868         }
 869 }
 870
 871 our $searchtype = $input_params{'searchtype'};
 872 if (defined $searchtype) {
 873         if ($searchtype =~ m/[^a-z]/) {
 874                 die_error(400, "Invalid searchtype parameter");
 875         }
 876 }
 877
 878 our $search_use_regexp = $input_params{'search_use_regexp'};
 879
 880 our $searchtext = $input_params{'searchtext'};
 881 our $search_regexp;
 882 if (defined $searchtext) {
 883         if (length($searchtext) < 2) {
 884                 die_error(403, "At least two characters are required for search parameter");
 885         }
 886         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 887 }
 888
 889 # path to the current git repository
 890 our $git_dir;
 891 $git_dir = "$projectroot/$project" if $project;
 892
 893 # list of supported snapshot formats
 894 our @snapshot_fmts = gitweb_get_feature('snapshot');
 895 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 896
 897 # check that the avatar feature is set to a known provider name,
 898 # and for each provider check if the dependencies are satisfied.
 899 # if the provider name is invalid or the dependencies are not met,
 900 # reset $git_avatar to the empty string.
 901 our ($git_avatar) = gitweb_get_feature('avatar');
 902 if ($git_avatar eq 'gravatar') {
 903         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 904 } elsif ($git_avatar eq 'picon') {
 905         # no dependencies
 906 } else {
 907         $git_avatar = '';
 908 }
 909
 910 # dispatch
 911 if (!defined $action) {
 912         if (defined $hash) {
 913                 $action = git_get_type($hash);
 914         } elsif (defined $hash_base && defined $file_name) {
 915                 $action = git_get_type("$hash_base:$file_name");
 916         } elsif (defined $project) {
 917                 $action = 'summary';
 918         } else {
 919                 $action = 'project_list';
 920         }
 921 }
 922 if (!defined($actions{$action})) {
 923         die_error(400, "Unknown action");
 924 }
 925 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 926     !$project) {
 927         die_error(400, "Project needed");
 928 }
 929 $actions{$action}->();
 930 exit;
 931
 932 ## ======================================================================
 933 ## action links
 934
 935 sub href {
 936         my %params = @_;
 937         # default is to use -absolute url() i.e. $my_uri
 938         my $href = $params{-full} ? $my_url : $my_uri;
 939
 940         $params{'project'} = $project unless exists $params{'project'};
 941
 942         if ($params{-replay}) {
 943                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 944                         if (!exists $params{$name}) {
 945                                 $params{$name} = $input_params{$name};
 946                         }
 947                 }
 948         }
 949
 950         my $use_pathinfo = gitweb_check_feature('pathinfo');
 951         if ($use_pathinfo and defined $params{'project'}) {
 952                 # try to put as many parameters as possible in PATH_INFO:
 953                 #   - project name
 954                 #   - action
 955                 #   - hash_parent or hash_parent_base:/file_parent
 956                 #   - hash or hash_base:/filename
 957                 #   - the snapshot_format as an appropriate suffix
 958
 959                 # When the script is the root DirectoryIndex for the domain,
 960                 # $href here would be something like http://gitweb.example.com/
 961                 # Thus, we strip any trailing / from $href, to spare us double
 962                 # slashes in the final URL
 963                 $href =~ s,/$,,;
 964
 965                 # Then add the project name, if present
 966                 $href .= "/".esc_url($params{'project'});
 967                 delete $params{'project'};
 968
 969                 # since we destructively absorb parameters, we keep this
 970                 # boolean that remembers if we're handling a snapshot
 971                 my $is_snapshot = $params{'action'} eq 'snapshot';
 972
 973                 # Summary just uses the project path URL, any other action is
 974                 # added to the URL
 975                 if (defined $params{'action'}) {
 976                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 977                         delete $params{'action'};
 978                 }
 979
 980                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 981                 # stripping nonexistent or useless pieces
 982                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 983                         || $params{'hash_parent'} || $params{'hash'});
 984                 if (defined $params{'hash_base'}) {
 985                         if (defined $params{'hash_parent_base'}) {
 986                                 $href .= esc_url($params{'hash_parent_base'});
 987                                 # skip the file_parent if it's the same as the file_name
 988                                 if (defined $params{'file_parent'}) {
 989                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 990                                                 delete $params{'file_parent'};
 991                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 992                                                 $href .= ":/".esc_url($params{'file_parent'});
 993                                                 delete $params{'file_parent'};
 994                                         }
 995                                 }
 996                                 $href .= "..";
 997                                 delete $params{'hash_parent'};
 998                                 delete $params{'hash_parent_base'};
 999                         } elsif (defined $params{'hash_parent'}) {
1000                                 $href .= esc_url($params{'hash_parent'}). "..";
1001                                 delete $params{'hash_parent'};
1002                         }
1003
1004                         $href .= esc_url($params{'hash_base'});
1005                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1006                                 $href .= ":/".esc_url($params{'file_name'});
1007                                 delete $params{'file_name'};
1008                         }
1009                         delete $params{'hash'};
1010                         delete $params{'hash_base'};
1011                 } elsif (defined $params{'hash'}) {
1012                         $href .= esc_url($params{'hash'});
1013                         delete $params{'hash'};
1014                 }
1015
1016                 # If the action was a snapshot, we can absorb the
1017                 # snapshot_format parameter too
1018                 if ($is_snapshot) {
1019                         my $fmt = $params{'snapshot_format'};
1020                         # snapshot_format should always be defined when href()
1021                         # is called, but just in case some code forgets, we
1022                         # fall back to the default
1023                         $fmt ||= $snapshot_fmts[0];
1024                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1025                         delete $params{'snapshot_format'};
1026                 }
1027         }
1028
1029         # now encode the parameters explicitly
1030         my @result = ();
1031         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1032                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1033                 if (defined $params{$name}) {
1034                         if (ref($params{$name}) eq "ARRAY") {
1035                                 foreach my $par (@{$params{$name}}) {
1036                                         push @result, $symbol . "=" . esc_param($par);
1037                                 }
1038                         } else {
1039                                 push @result, $symbol . "=" . esc_param($params{$name});
1040                         }
1041                 }
1042         }
1043         $href .= "?" . join(';', @result) if scalar @result;
1044
1045         return $href;
1046 }
1047
1048
1049 ## ======================================================================
1050 ## validation, quoting/unquoting and escaping
1051
1052 sub validate_action {
1053         my $input = shift || return undef;
1054         return undef unless exists $actions{$input};
1055         return $input;
1056 }
1057
1058 sub validate_project {
1059         my $input = shift || return undef;
1060         if (!validate_pathname($input) ||
1061                 !(-d "$projectroot/$input") ||
1062                 !check_export_ok("$projectroot/$input") ||
1063                 ($strict_export && !project_in_list($input))) {
1064                 return undef;
1065         } else {
1066                 return $input;
1067         }
1068 }
1069
1070 sub validate_pathname {
1071         my $input = shift || return undef;
1072
1073         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1074         # at the beginning, at the end, and between slashes.
1075         # also this catches doubled slashes
1076         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1077                 return undef;
1078         }
1079         # no null characters
1080         if ($input =~ m!\0!) {
1081                 return undef;
1082         }
1083         return $input;
1084 }
1085
1086 sub validate_refname {
1087         my $input = shift || return undef;
1088
1089         # textual hashes are O.K.
1090         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1091                 return $input;
1092         }
1093         # it must be correct pathname
1094         $input = validate_pathname($input)
1095                 or return undef;
1096         # restrictions on ref name according to git-check-ref-format
1097         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1098                 return undef;
1099         }
1100         return $input;
1101 }
1102
1103 # decode sequences of octets in utf8 into Perl's internal form,
1104 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1105 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1106 sub to_utf8 {
1107         my $str = shift;
1108         if (utf8::valid($str)) {
1109                 utf8::decode($str);
1110                 return $str;
1111         } else {
1112                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1113         }
1114 }
1115
1116 # quote unsafe chars, but keep the slash, even when it's not
1117 # correct, but quoted slashes look too horrible in bookmarks
1118 sub esc_param {
1119         my $str = shift;
1120         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1121         $str =~ s/ /\+/g;
1122         return $str;
1123 }
1124
1125 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1126 sub esc_url {
1127         my $str = shift;
1128         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1129         $str =~ s/\+/%2B/g;
1130         $str =~ s/ /\+/g;
1131         return $str;
1132 }
1133
1134 # replace invalid utf8 character with SUBSTITUTION sequence
1135 sub esc_html {
1136         my $str = shift;
1137         my %opts = @_;
1138
1139         $str = to_utf8($str);
1140         $str = $cgi->escapeHTML($str);
1141         if ($opts{'-nbsp'}) {
1142                 $str =~ s/ /&nbsp;/g;
1143         }
1144         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1145         return $str;
1146 }
1147
1148 # quote control characters and escape filename to HTML
1149 sub esc_path {
1150         my $str = shift;
1151         my %opts = @_;
1152
1153         $str = to_utf8($str);
1154         $str = $cgi->escapeHTML($str);
1155         if ($opts{'-nbsp'}) {
1156                 $str =~ s/ /&nbsp;/g;
1157         }
1158         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1159         return $str;
1160 }
1161
1162 # Make control characters "printable", using character escape codes (CEC)
1163 sub quot_cec {
1164         my $cntrl = shift;
1165         my %opts = @_;
1166         my %es = ( # character escape codes, aka escape sequences
1167                 "\t" => '\t',   # tab            (HT)
1168                 "\n" => '\n',   # line feed      (LF)
1169                 "\r" => '\r',   # carrige return (CR)
1170                 "\f" => '\f',   # form feed      (FF)
1171                 "\b" => '\b',   # backspace      (BS)
1172                 "\a" => '\a',   # alarm (bell)   (BEL)
1173                 "\e" => '\e',   # escape         (ESC)
1174                 "\013" => '\v', # vertical tab   (VT)
1175                 "\000" => '\0', # nul character  (NUL)
1176         );
1177         my $chr = ( (exists $es{$cntrl})
1178                     ? $es{$cntrl}
1179                     : sprintf('\%2x', ord($cntrl)) );
1180         if ($opts{-nohtml}) {
1181                 return $chr;
1182         } else {
1183                 return "<span class=\"cntrl\">$chr</span>";
1184         }
1185 }
1186
1187 # Alternatively use unicode control pictures codepoints,
1188 # Unicode "printable representation" (PR)
1189 sub quot_upr {
1190         my $cntrl = shift;
1191         my %opts = @_;
1192
1193         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1194         if ($opts{-nohtml}) {
1195                 return $chr;
1196         } else {
1197                 return "<span class=\"cntrl\">$chr</span>";
1198         }
1199 }
1200
1201 # git may return quoted and escaped filenames
1202 sub unquote {
1203         my $str = shift;
1204
1205         sub unq {
1206                 my $seq = shift;
1207                 my %es = ( # character escape codes, aka escape sequences
1208                         't' => "\t",   # tab            (HT, TAB)
1209                         'n' => "\n",   # newline        (NL)
1210                         'r' => "\r",   # return         (CR)
1211                         'f' => "\f",   # form feed      (FF)
1212                         'b' => "\b",   # backspace      (BS)
1213                         'a' => "\a",   # alarm (bell)   (BEL)
1214                         'e' => "\e",   # escape         (ESC)
1215                         'v' => "\013", # vertical tab   (VT)
1216                 );
1217
1218                 if ($seq =~ m/^[0-7]{1,3}$/) {
1219                         # octal char sequence
1220                         return chr(oct($seq));
1221                 } elsif (exists $es{$seq}) {
1222                         # C escape sequence, aka character escape code
1223                         return $es{$seq};
1224                 }
1225                 # quoted ordinary character
1226                 return $seq;
1227         }
1228
1229         if ($str =~ m/^"(.*)"$/) {
1230                 # needs unquoting
1231                 $str = $1;
1232                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1233         }
1234         return $str;
1235 }
1236
1237 # escape tabs (convert tabs to spaces)
1238 sub untabify {
1239         my $line = shift;
1240
1241         while ((my $pos = index($line, "\t")) != -1) {
1242                 if (my $count = (8 - ($pos % 8))) {
1243                         my $spaces = ' ' x $count;
1244                         $line =~ s/\t/$spaces/;
1245                 }
1246         }
1247
1248         return $line;
1249 }
1250
1251 sub project_in_list {
1252         my $project = shift;
1253         my @list = git_get_projects_list();
1254         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1255 }
1256
1257 ## ----------------------------------------------------------------------
1258 ## HTML aware string manipulation
1259
1260 # Try to chop given string on a word boundary between position
1261 # $len and $len+$add_len. If there is no word boundary there,
1262 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1263 # (marking chopped part) would be longer than given string.
1264 sub chop_str {
1265         my $str = shift;
1266         my $len = shift;
1267         my $add_len = shift || 10;
1268         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1269
1270         # Make sure perl knows it is utf8 encoded so we don't
1271         # cut in the middle of a utf8 multibyte char.
1272         $str = to_utf8($str);
1273
1274         # allow only $len chars, but don't cut a word if it would fit in $add_len
1275         # if it doesn't fit, cut it if it's still longer than the dots we would add
1276         # remove chopped character entities entirely
1277
1278         # when chopping in the middle, distribute $len into left and right part
1279         # return early if chopping wouldn't make string shorter
1280         if ($where eq 'center') {
1281                 return $str if ($len + 5 >= length($str)); # filler is length 5
1282                 $len = int($len/2);
1283         } else {
1284                 return $str if ($len + 4 >= length($str)); # filler is length 4
1285         }
1286
1287         # regexps: ending and beginning with word part up to $add_len
1288         my $endre = qr/.{$len}\w{0,$add_len}/;
1289         my $begre = qr/\w{0,$add_len}.{$len}/;
1290
1291         if ($where eq 'left') {
1292                 $str =~ m/^(.*?)($begre)$/;
1293                 my ($lead, $body) = ($1, $2);
1294                 if (length($lead) > 4) {
1295                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1296                         $lead = " ...";
1297                 }
1298                 return "$lead$body";
1299
1300         } elsif ($where eq 'center') {
1301                 $str =~ m/^($endre)(.*)$/;
1302                 my ($left, $str)  = ($1, $2);
1303                 $str =~ m/^(.*?)($begre)$/;
1304                 my ($mid, $right) = ($1, $2);
1305                 if (length($mid) > 5) {
1306                         $left  =~ s/&[^;]*$//;
1307                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1308                         $mid = " ... ";
1309                 }
1310                 return "$left$mid$right";
1311
1312         } else {
1313                 $str =~ m/^($endre)(.*)$/;
1314                 my $body = $1;
1315                 my $tail = $2;
1316                 if (length($tail) > 4) {
1317                         $body =~ s/&[^;]*$//;
1318                         $tail = "... ";
1319                 }
1320                 return "$body$tail";
1321         }
1322 }
1323
1324 # takes the same arguments as chop_str, but also wraps a <span> around the
1325 # result with a title attribute if it does get chopped. Additionally, the
1326 # string is HTML-escaped.
1327 sub chop_and_escape_str {
1328         my ($str) = @_;
1329
1330         my $chopped = chop_str(@_);
1331         if ($chopped eq $str) {
1332                 return esc_html($chopped);
1333         } else {
1334                 $str =~ s/[[:cntrl:]]/?/g;
1335                 return $cgi->span({-title=>$str}, esc_html($chopped));
1336         }
1337 }
1338
1339 ## ----------------------------------------------------------------------
1340 ## functions returning short strings
1341
1342 # CSS class for given age value (in seconds)
1343 sub age_class {
1344         my $age = shift;
1345
1346         if (!defined $age) {
1347                 return "noage";
1348         } elsif ($age < 60*60*2) {
1349                 return "age0";
1350         } elsif ($age < 60*60*24*2) {
1351                 return "age1";
1352         } else {
1353                 return "age2";
1354         }
1355 }
1356
1357 # convert age in seconds to "nn units ago" string
1358 sub age_string {
1359         my $age = shift;
1360         my $age_str;
1361
1362         if ($age > 60*60*24*365*2) {
1363                 $age_str = (int $age/60/60/24/365);
1364                 $age_str .= " years ago";
1365         } elsif ($age > 60*60*24*(365/12)*2) {
1366                 $age_str = int $age/60/60/24/(365/12);
1367                 $age_str .= " months ago";
1368         } elsif ($age > 60*60*24*7*2) {
1369                 $age_str = int $age/60/60/24/7;
1370                 $age_str .= " weeks ago";
1371         } elsif ($age > 60*60*24*2) {
1372                 $age_str = int $age/60/60/24;
1373                 $age_str .= " days ago";
1374         } elsif ($age > 60*60*2) {
1375                 $age_str = int $age/60/60;
1376                 $age_str .= " hours ago";
1377         } elsif ($age > 60*2) {
1378                 $age_str = int $age/60;
1379                 $age_str .= " min ago";
1380         } elsif ($age > 2) {
1381                 $age_str = int $age;
1382                 $age_str .= " sec ago";
1383         } else {
1384                 $age_str .= " right now";
1385         }
1386         return $age_str;
1387 }
1388
1389 use constant {
1390         S_IFINVALID => 0030000,
1391         S_IFGITLINK => 0160000,
1392 };
1393
1394 # submodule/subproject, a commit object reference
1395 sub S_ISGITLINK {
1396         my $mode = shift;
1397
1398         return (($mode & S_IFMT) == S_IFGITLINK)
1399 }
1400
1401 # convert file mode in octal to symbolic file mode string
1402 sub mode_str {
1403         my $mode = oct shift;
1404
1405         if (S_ISGITLINK($mode)) {
1406                 return 'm---------';
1407         } elsif (S_ISDIR($mode & S_IFMT)) {
1408                 return 'drwxr-xr-x';
1409         } elsif (S_ISLNK($mode)) {
1410                 return 'lrwxrwxrwx';
1411         } elsif (S_ISREG($mode)) {
1412                 # git cares only about the executable bit
1413                 if ($mode & S_IXUSR) {
1414                         return '-rwxr-xr-x';
1415                 } else {
1416                         return '-rw-r--r--';
1417                 };
1418         } else {
1419                 return '----------';
1420         }
1421 }
1422
1423 # convert file mode in octal to file type string
1424 sub file_type {
1425         my $mode = shift;
1426
1427         if ($mode !~ m/^[0-7]+$/) {
1428                 return $mode;
1429         } else {
1430                 $mode = oct $mode;
1431         }
1432
1433         if (S_ISGITLINK($mode)) {
1434                 return "submodule";
1435         } elsif (S_ISDIR($mode & S_IFMT)) {
1436                 return "directory";
1437         } elsif (S_ISLNK($mode)) {
1438                 return "symlink";
1439         } elsif (S_ISREG($mode)) {
1440                 return "file";
1441         } else {
1442                 return "unknown";
1443         }
1444 }
1445
1446 # convert file mode in octal to file type description string
1447 sub file_type_long {
1448         my $mode = shift;
1449
1450         if ($mode !~ m/^[0-7]+$/) {
1451                 return $mode;
1452         } else {
1453                 $mode = oct $mode;
1454         }
1455
1456         if (S_ISGITLINK($mode)) {
1457                 return "submodule";
1458         } elsif (S_ISDIR($mode & S_IFMT)) {
1459                 return "directory";
1460         } elsif (S_ISLNK($mode)) {
1461                 return "symlink";
1462         } elsif (S_ISREG($mode)) {
1463                 if ($mode & S_IXUSR) {
1464                         return "executable";
1465                 } else {
1466                         return "file";
1467                 };
1468         } else {
1469                 return "unknown";
1470         }
1471 }
1472
1473
1474 ## ----------------------------------------------------------------------
1475 ## functions returning short HTML fragments, or transforming HTML fragments
1476 ## which don't belong to other sections
1477
1478 # format line of commit message.
1479 sub format_log_line_html {
1480         my $line = shift;
1481
1482         $line = esc_html($line, -nbsp=>1);
1483         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1484                 $cgi->a({-href => href(action=>"object", hash=>$1),
1485                                         -class => "text"}, $1);
1486         }eg;
1487
1488         return $line;
1489 }
1490
1491 # format marker of refs pointing to given object
1492
1493 # the destination action is chosen based on object type and current context:
1494 # - for annotated tags, we choose the tag view unless it's the current view
1495 #   already, in which case we go to shortlog view
1496 # - for other refs, we keep the current view if we're in history, shortlog or
1497 #   log view, and select shortlog otherwise
1498 sub format_ref_marker {
1499         my ($refs, $id) = @_;
1500         my $markers = '';
1501
1502         if (defined $refs->{$id}) {
1503                 foreach my $ref (@{$refs->{$id}}) {
1504                         # this code exploits the fact that non-lightweight tags are the
1505                         # only indirect objects, and that they are the only objects for which
1506                         # we want to use tag instead of shortlog as action
1507                         my ($type, $name) = qw();
1508                         my $indirect = ($ref =~ s/\^\{\}$//);
1509                         # e.g. tags/v2.6.11 or heads/next
1510                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1511                                 $type = $1;
1512                                 $name = $2;
1513                         } else {
1514                                 $type = "ref";
1515                                 $name = $ref;
1516                         }
1517
1518                         my $class = $type;
1519                         $class .= " indirect" if $indirect;
1520
1521                         my $dest_action = "shortlog";
1522
1523                         if ($indirect) {
1524                                 $dest_action = "tag" unless $action eq "tag";
1525                         } elsif ($action =~ /^(history|(short)?log)$/) {
1526                                 $dest_action = $action;
1527                         }
1528
1529                         my $dest = "";
1530                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1531                         $dest .= $ref;
1532
1533                         my $link = $cgi->a({
1534                                 -href => href(
1535                                         action=>$dest_action,
1536                                         hash=>$dest
1537                                 )}, $name);
1538
1539                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1540                                 $link . "</span>";
1541                 }
1542         }
1543
1544         if ($markers) {
1545                 return ' <span class="refs">'. $markers . '</span>';
1546         } else {
1547                 return "";
1548         }
1549 }
1550
1551 # format, perhaps shortened and with markers, title line
1552 sub format_subject_html {
1553         my ($long, $short, $href, $extra) = @_;
1554         $extra = '' unless defined($extra);
1555
1556         if (length($short) < length($long)) {
1557                 $long =~ s/[[:cntrl:]]/?/g;
1558                 return $cgi->a({-href => $href, -class => "list subject",
1559                                 -title => to_utf8($long)},
1560                        esc_html($short)) . $extra;
1561         } else {
1562                 return $cgi->a({-href => $href, -class => "list subject"},
1563                        esc_html($long)) . $extra;
1564         }
1565 }
1566
1567 # Rather than recomputing the url for an email multiple times, we cache it
1568 # after the first hit. This gives a visible benefit in views where the avatar
1569 # for the same email is used repeatedly (e.g. shortlog).
1570 # The cache is shared by all avatar engines (currently gravatar only), which
1571 # are free to use it as preferred. Since only one avatar engine is used for any
1572 # given page, there's no risk for cache conflicts.
1573 our %avatar_cache = ();
1574
1575 # Compute the picon url for a given email, by using the picon search service over at
1576 # http://www.cs.indiana.edu/picons/search.html
1577 sub picon_url {
1578         my $email = lc shift;
1579         if (!$avatar_cache{$email}) {
1580                 my ($user, $domain) = split('@', $email);
1581                 $avatar_cache{$email} =
1582                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1583                         "$domain/$user/" .
1584                         "users+domains+unknown/up/single";
1585         }
1586         return $avatar_cache{$email};
1587 }
1588
1589 # Compute the gravatar url for a given email, if it's not in the cache already.
1590 # Gravatar stores only the part of the URL before the size, since that's the
1591 # one computationally more expensive. This also allows reuse of the cache for
1592 # different sizes (for this particular engine).
1593 sub gravatar_url {
1594         my $email = lc shift;
1595         my $size = shift;
1596         $avatar_cache{$email} ||=
1597                 "http://www.gravatar.com/avatar/" .
1598                         Digest::MD5::md5_hex($email) . "?s=";
1599         return $avatar_cache{$email} . $size;
1600 }
1601
1602 # Insert an avatar for the given $email at the given $size if the feature
1603 # is enabled.
1604 sub git_get_avatar {
1605         my ($email, %opts) = @_;
1606         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1607         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1608         $opts{-size} ||= 'default';
1609         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1610         my $url = "";
1611         if ($git_avatar eq 'gravatar') {
1612                 $url = gravatar_url($email, $size);
1613         } elsif ($git_avatar eq 'picon') {
1614                 $url = picon_url($email);
1615         }
1616         # Other providers can be added by extending the if chain, defining $url
1617         # as needed. If no variant puts something in $url, we assume avatars
1618         # are completely disabled/unavailable.
1619         if ($url) {
1620                 return $pre_white .
1621                        "<img width=\"$size\" " .
1622                             "class=\"avatar\" " .
1623                             "src=\"$url\" " .
1624                             "alt=\"\" " .
1625                        "/>" . $post_white;
1626         } else {
1627                 return "";
1628         }
1629 }
1630
1631 sub format_search_author {
1632         my ($author, $searchtype, $displaytext) = @_;
1633         my $have_search = gitweb_check_feature('search');
1634
1635         if ($have_search) {
1636                 my $performed = "";
1637                 if ($searchtype eq 'author') {
1638                         $performed = "authored";
1639                 } elsif ($searchtype eq 'committer') {
1640                         $performed = "committed";
1641                 }
1642
1643                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1644                                 searchtext=>$author,
1645                                 searchtype=>$searchtype), class=>"list",
1646                                 title=>"Search for commits $performed by $author"},
1647                                 $displaytext);
1648
1649         } else {
1650                 return $displaytext;
1651         }
1652 }
1653
1654 # format the author name of the given commit with the given tag
1655 # the author name is chopped and escaped according to the other
1656 # optional parameters (see chop_str).
1657 sub format_author_html {
1658         my $tag = shift;
1659         my $co = shift;
1660         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1661         return "<$tag class=\"author\">" .
1662                format_search_author($co->{'author_name'}, "author",
1663                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1664                        $author) .
1665                "</$tag>";
1666 }
1667
1668 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1669 sub format_git_diff_header_line {
1670         my $line = shift;
1671         my $diffinfo = shift;
1672         my ($from, $to) = @_;
1673
1674         if ($diffinfo->{'nparents'}) {
1675                 # combined diff
1676                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1677                 if ($to->{'href'}) {
1678                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1679                                          esc_path($to->{'file'}));
1680                 } else { # file was deleted (no href)
1681                         $line .= esc_path($to->{'file'});
1682                 }
1683         } else {
1684                 # "ordinary" diff
1685                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1686                 if ($from->{'href'}) {
1687                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1688                                          'a/' . esc_path($from->{'file'}));
1689                 } else { # file was added (no href)
1690                         $line .= 'a/' . esc_path($from->{'file'});
1691                 }
1692                 $line .= ' ';
1693                 if ($to->{'href'}) {
1694                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1695                                          'b/' . esc_path($to->{'file'}));
1696                 } else { # file was deleted
1697                         $line .= 'b/' . esc_path($to->{'file'});
1698                 }
1699         }
1700
1701         return "<div class=\"diff header\">$line</div>\n";
1702 }
1703
1704 # format extended diff header line, before patch itself
1705 sub format_extended_diff_header_line {
1706         my $line = shift;
1707         my $diffinfo = shift;
1708         my ($from, $to) = @_;
1709
1710         # match <path>
1711         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1712                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1713                                        esc_path($from->{'file'}));
1714         }
1715         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1716                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1717                                  esc_path($to->{'file'}));
1718         }
1719         # match single <mode>
1720         if ($line =~ m/\s(\d{6})$/) {
1721                 $line .= '<span class="info"> (' .
1722                          file_type_long($1) .
1723                          ')</span>';
1724         }
1725         # match <hash>
1726         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1727                 # can match only for combined diff
1728                 $line = 'index ';
1729                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1730                         if ($from->{'href'}[$i]) {
1731                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1732                                                   -class=>"hash"},
1733                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1734                         } else {
1735                                 $line .= '0' x 7;
1736                         }
1737                         # separator
1738                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1739                 }
1740                 $line .= '..';
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1743                                          substr($diffinfo->{'to_id'},0,7));
1744                 } else {
1745                         $line .= '0' x 7;
1746                 }
1747
1748         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1749                 # can match only for ordinary diff
1750                 my ($from_link, $to_link);
1751                 if ($from->{'href'}) {
1752                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1753                                              substr($diffinfo->{'from_id'},0,7));
1754                 } else {
1755                         $from_link = '0' x 7;
1756                 }
1757                 if ($to->{'href'}) {
1758                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1759                                            substr($diffinfo->{'to_id'},0,7));
1760                 } else {
1761                         $to_link = '0' x 7;
1762                 }
1763                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1764                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1765         }
1766
1767         return $line . "<br/>\n";
1768 }
1769
1770 # format from-file/to-file diff header
1771 sub format_diff_from_to_header {
1772         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1773         my $line;
1774         my $result = '';
1775
1776         $line = $from_line;
1777         #assert($line =~ m/^---/) if DEBUG;
1778         # no extra formatting for "^--- /dev/null"
1779         if (! $diffinfo->{'nparents'}) {
1780                 # ordinary (single parent) diff
1781                 if ($line =~ m!^--- "?a/!) {
1782                         if ($from->{'href'}) {
1783                                 $line = '--- a/' .
1784                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1785                                                 esc_path($from->{'file'}));
1786                         } else {
1787                                 $line = '--- a/' .
1788                                         esc_path($from->{'file'});
1789                         }
1790                 }
1791                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1792
1793         } else {
1794                 # combined diff (merge commit)
1795                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1796                         if ($from->{'href'}[$i]) {
1797                                 $line = '--- ' .
1798                                         $cgi->a({-href=>href(action=>"blobdiff",
1799                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1800                                                              hash_parent_base=>$parents[$i],
1801                                                              file_parent=>$from->{'file'}[$i],
1802                                                              hash=>$diffinfo->{'to_id'},
1803                                                              hash_base=>$hash,
1804                                                              file_name=>$to->{'file'}),
1805                                                  -class=>"path",
1806                                                  -title=>"diff" . ($i+1)},
1807                                                 $i+1) .
1808                                         '/' .
1809                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1810                                                 esc_path($from->{'file'}[$i]));
1811                         } else {
1812                                 $line = '--- /dev/null';
1813                         }
1814                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1815                 }
1816         }
1817
1818         $line = $to_line;
1819         #assert($line =~ m/^\+\+\+/) if DEBUG;
1820         # no extra formatting for "^+++ /dev/null"
1821         if ($line =~ m!^\+\+\+ "?b/!) {
1822                 if ($to->{'href'}) {
1823                         $line = '+++ b/' .
1824                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1825                                         esc_path($to->{'file'}));
1826                 } else {
1827                         $line = '+++ b/' .
1828                                 esc_path($to->{'file'});
1829                 }
1830         }
1831         $result .= qq!<div class="diff to_file">$line</div>\n!;
1832
1833         return $result;
1834 }
1835
1836 # create note for patch simplified by combined diff
1837 sub format_diff_cc_simplified {
1838         my ($diffinfo, @parents) = @_;
1839         my $result = '';
1840
1841         $result .= "<div class=\"diff header\">" .
1842                    "diff --cc ";
1843         if (!is_deleted($diffinfo)) {
1844                 $result .= $cgi->a({-href => href(action=>"blob",
1845                                                   hash_base=>$hash,
1846                                                   hash=>$diffinfo->{'to_id'},
1847                                                   file_name=>$diffinfo->{'to_file'}),
1848                                     -class => "path"},
1849                                    esc_path($diffinfo->{'to_file'}));
1850         } else {
1851                 $result .= esc_path($diffinfo->{'to_file'});
1852         }
1853         $result .= "</div>\n" . # class="diff header"
1854                    "<div class=\"diff nodifferences\">" .
1855                    "Simple merge" .
1856                    "</div>\n"; # class="diff nodifferences"
1857
1858         return $result;
1859 }
1860
1861 # format patch (diff) line (not to be used for diff headers)
1862 sub format_diff_line {
1863         my $line = shift;
1864         my ($from, $to) = @_;
1865         my $diff_class = "";
1866
1867         chomp $line;
1868
1869         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1870                 # combined diff
1871                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1872                 if ($line =~ m/^\@{3}/) {
1873                         $diff_class = " chunk_header";
1874                 } elsif ($line =~ m/^\\/) {
1875                         $diff_class = " incomplete";
1876                 } elsif ($prefix =~ tr/+/+/) {
1877                         $diff_class = " add";
1878                 } elsif ($prefix =~ tr/-/-/) {
1879                         $diff_class = " rem";
1880                 }
1881         } else {
1882                 # assume ordinary diff
1883                 my $char = substr($line, 0, 1);
1884                 if ($char eq '+') {
1885                         $diff_class = " add";
1886                 } elsif ($char eq '-') {
1887                         $diff_class = " rem";
1888                 } elsif ($char eq '@') {
1889                         $diff_class = " chunk_header";
1890                 } elsif ($char eq "\\") {
1891                         $diff_class = " incomplete";
1892                 }
1893         }
1894         $line = untabify($line);
1895         if ($from && $to && $line =~ m/^\@{2} /) {
1896                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1897                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1898
1899                 $from_lines = 0 unless defined $from_lines;
1900                 $to_lines   = 0 unless defined $to_lines;
1901
1902                 if ($from->{'href'}) {
1903                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1904                                              -class=>"list"}, $from_text);
1905                 }
1906                 if ($to->{'href'}) {
1907                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1908                                              -class=>"list"}, $to_text);
1909                 }
1910                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1911                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1912                 return "<div class=\"diff$diff_class\">$line</div>\n";
1913         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1914                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1915                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1916
1917                 @from_text = split(' ', $ranges);
1918                 for (my $i = 0; $i < @from_text; ++$i) {
1919                         ($from_start[$i], $from_nlines[$i]) =
1920                                 (split(',', substr($from_text[$i], 1)), 0);
1921                 }
1922
1923                 $to_text   = pop @from_text;
1924                 $to_start  = pop @from_start;
1925                 $to_nlines = pop @from_nlines;
1926
1927                 $line = "<span class=\"chunk_info\">$prefix ";
1928                 for (my $i = 0; $i < @from_text; ++$i) {
1929                         if ($from->{'href'}[$i]) {
1930                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1931                                                   -class=>"list"}, $from_text[$i]);
1932                         } else {
1933                                 $line .= $from_text[$i];
1934                         }
1935                         $line .= " ";
1936                 }
1937                 if ($to->{'href'}) {
1938                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1939                                           -class=>"list"}, $to_text);
1940                 } else {
1941                         $line .= $to_text;
1942                 }
1943                 $line .= " $prefix</span>" .
1944                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1945                 return "<div class=\"diff$diff_class\">$line</div>\n";
1946         }
1947         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1948 }
1949
1950 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1951 # linked.  Pass the hash of the tree/commit to snapshot.
1952 sub format_snapshot_links {
1953         my ($hash) = @_;
1954         my $num_fmts = @snapshot_fmts;
1955         if ($num_fmts > 1) {
1956                 # A parenthesized list of links bearing format names.
1957                 # e.g. "snapshot (_tar.gz_ _zip_)"
1958                 return "snapshot (" . join(' ', map
1959                         $cgi->a({
1960                                 -href => href(
1961                                         action=>"snapshot",
1962                                         hash=>$hash,
1963                                         snapshot_format=>$_
1964                                 )
1965                         }, $known_snapshot_formats{$_}{'display'})
1966                 , @snapshot_fmts) . ")";
1967         } elsif ($num_fmts == 1) {
1968                 # A single "snapshot" link whose tooltip bears the format name.
1969                 # i.e. "_snapshot_"
1970                 my ($fmt) = @snapshot_fmts;
1971                 return
1972                         $cgi->a({
1973                                 -href => href(
1974                                         action=>"snapshot",
1975                                         hash=>$hash,
1976                                         snapshot_format=>$fmt
1977                                 ),
1978                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1979                         }, "snapshot");
1980         } else { # $num_fmts == 0
1981                 return undef;
1982         }
1983 }
1984
1985 ## ......................................................................
1986 ## functions returning values to be passed, perhaps after some
1987 ## transformation, to other functions; e.g. returning arguments to href()
1988
1989 # returns hash to be passed to href to generate gitweb URL
1990 # in -title key it returns description of link
1991 sub get_feed_info {
1992         my $format = shift || 'Atom';
1993         my %res = (action => lc($format));
1994
1995         # feed links are possible only for project views
1996         return unless (defined $project);
1997         # some views should link to OPML, or to generic project feed,
1998         # or don't have specific feed yet (so they should use generic)
1999         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2000
2001         my $branch;
2002         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2003         # from tag links; this also makes possible to detect branch links
2004         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2005             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2006                 $branch = $1;
2007         }
2008         # find log type for feed description (title)
2009         my $type = 'log';
2010         if (defined $file_name) {
2011                 $type  = "history of $file_name";
2012                 $type .= "/" if ($action eq 'tree');
2013                 $type .= " on '$branch'" if (defined $branch);
2014         } else {
2015                 $type = "log of $branch" if (defined $branch);
2016         }
2017
2018         $res{-title} = $type;
2019         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2020         $res{'file_name'} = $file_name;
2021
2022         return %res;
2023 }
2024
2025 ## ----------------------------------------------------------------------
2026 ## git utility subroutines, invoking git commands
2027
2028 # returns path to the core git executable and the --git-dir parameter as list
2029 sub git_cmd {
2030         $number_of_git_cmds++;
2031         return $GIT, '--git-dir='.$git_dir;
2032 }
2033
2034 # quote the given arguments for passing them to the shell
2035 # quote_command("command", "arg 1", "arg with ' and ! characters")
2036 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2037 # Try to avoid using this function wherever possible.
2038 sub quote_command {
2039         return join(' ',
2040                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2041 }
2042
2043 # get HEAD ref of given project as hash
2044 sub git_get_head_hash {
2045         my $project = shift;
2046         my $o_git_dir = $git_dir;
2047         my $retval = undef;
2048         $git_dir = "$projectroot/$project";
2049         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2050                 my $head = <$fd>;
2051                 close $fd;
2052                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2053                         $retval = $1;
2054                 }
2055         }
2056         if (defined $o_git_dir) {
2057                 $git_dir = $o_git_dir;
2058         }
2059         return $retval;
2060 }
2061
2062 # get type of given object
2063 sub git_get_type {
2064         my $hash = shift;
2065
2066         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2067         my $type = <$fd>;
2068         close $fd or return;
2069         chomp $type;
2070         return $type;
2071 }
2072
2073 # repository configuration
2074 our $config_file = '';
2075 our %config;
2076
2077 # store multiple values for single key as anonymous array reference
2078 # single values stored directly in the hash, not as [ <value> ]
2079 sub hash_set_multi {
2080         my ($hash, $key, $value) = @_;
2081
2082         if (!exists $hash->{$key}) {
2083                 $hash->{$key} = $value;
2084         } elsif (!ref $hash->{$key}) {
2085                 $hash->{$key} = [ $hash->{$key}, $value ];
2086         } else {
2087                 push @{$hash->{$key}}, $value;
2088         }
2089 }
2090
2091 # return hash of git project configuration
2092 # optionally limited to some section, e.g. 'gitweb'
2093 sub git_parse_project_config {
2094         my $section_regexp = shift;
2095         my %config;
2096
2097         local $/ = "\0";
2098
2099         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2100                 or return;
2101
2102         while (my $keyval = <$fh>) {
2103                 chomp $keyval;
2104                 my ($key, $value) = split(/\n/, $keyval, 2);
2105
2106                 hash_set_multi(\%config, $key, $value)
2107                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2108         }
2109         close $fh;
2110
2111         return %config;
2112 }
2113
2114 # convert config value to boolean: 'true' or 'false'
2115 # no value, number > 0, 'true' and 'yes' values are true
2116 # rest of values are treated as false (never as error)
2117 sub config_to_bool {
2118         my $val = shift;
2119
2120         return 1 if !defined $val;             # section.key
2121
2122         # strip leading and trailing whitespace
2123         $val =~ s/^\s+//;
2124         $val =~ s/\s+$//;
2125
2126         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2127                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2128 }
2129
2130 # convert config value to simple decimal number
2131 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2132 # to be multiplied by 1024, 1048576, or 1073741824
2133 sub config_to_int {
2134         my $val = shift;
2135
2136         # strip leading and trailing whitespace
2137         $val =~ s/^\s+//;
2138         $val =~ s/\s+$//;
2139
2140         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2141                 $unit = lc($unit);
2142                 # unknown unit is treated as 1
2143                 return $num * ($unit eq 'g' ? 1073741824 :
2144                                $unit eq 'm' ?    1048576 :
2145                                $unit eq 'k' ?       1024 : 1);
2146         }
2147         return $val;
2148 }
2149
2150 # convert config value to array reference, if needed
2151 sub config_to_multi {
2152         my $val = shift;
2153
2154         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2155 }
2156
2157 sub git_get_project_config {
2158         my ($key, $type) = @_;
2159
2160         # key sanity check
2161         return unless ($key);
2162         $key =~ s/^gitweb\.//;
2163         return if ($key =~ m/\W/);
2164
2165         # type sanity check
2166         if (defined $type) {
2167                 $type =~ s/^--//;
2168                 $type = undef
2169                         unless ($type eq 'bool' || $type eq 'int');
2170         }
2171
2172         # get config
2173         if (!defined $config_file ||
2174             $config_file ne "$git_dir/config") {
2175                 %config = git_parse_project_config('gitweb');
2176                 $config_file = "$git_dir/config";
2177         }
2178
2179         # check if config variable (key) exists
2180         return unless exists $config{"gitweb.$key"};
2181
2182         # ensure given type
2183         if (!defined $type) {
2184                 return $config{"gitweb.$key"};
2185         } elsif ($type eq 'bool') {
2186                 # backward compatibility: 'git config --bool' returns true/false
2187                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2188         } elsif ($type eq 'int') {
2189                 return config_to_int($config{"gitweb.$key"});
2190         }
2191         return $config{"gitweb.$key"};
2192 }
2193
2194 # get hash of given path at given ref
2195 sub git_get_hash_by_path {
2196         my $base = shift;
2197         my $path = shift || return undef;
2198         my $type = shift;
2199
2200         $path =~ s,/+$,,;
2201
2202         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2203                 or die_error(500, "Open git-ls-tree failed");
2204         my $line = <$fd>;
2205         close $fd or return undef;
2206
2207         if (!defined $line) {
2208                 # there is no tree or hash given by $path at $base
2209                 return undef;
2210         }
2211
2212         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2213         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2214         if (defined $type && $type ne $2) {
2215                 # type doesn't match
2216                 return undef;
2217         }
2218         return $3;
2219 }
2220
2221 # get path of entry with given hash at given tree-ish (ref)
2222 # used to get 'from' filename for combined diff (merge commit) for renames
2223 sub git_get_path_by_hash {
2224         my $base = shift || return;
2225         my $hash = shift || return;
2226
2227         local $/ = "\0";
2228
2229         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2230                 or return undef;
2231         while (my $line = <$fd>) {
2232                 chomp $line;
2233
2234                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2235                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2236                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2237                         close $fd;
2238                         return $1;
2239                 }
2240         }
2241         close $fd;
2242         return undef;
2243 }
2244
2245 ## ......................................................................
2246 ## git utility functions, directly accessing git repository
2247
2248 sub git_get_project_description {
2249         my $path = shift;
2250
2251         $git_dir = "$projectroot/$path";
2252         open my $fd, '<', "$git_dir/description"
2253                 or return git_get_project_config('description');
2254         my $descr = <$fd>;
2255         close $fd;
2256         if (defined $descr) {
2257                 chomp $descr;
2258         }
2259         return $descr;
2260 }
2261
2262 sub git_get_project_ctags {
2263         my $path = shift;
2264         my $ctags = {};
2265
2266         $git_dir = "$projectroot/$path";
2267         opendir my $dh, "$git_dir/ctags"
2268                 or return $ctags;
2269         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2270                 open my $ct, '<', $_ or next;
2271                 my $val = <$ct>;
2272                 chomp $val;
2273                 close $ct;
2274                 my $ctag = $_; $ctag =~ s#.*/##;
2275                 $ctags->{$ctag} = $val;
2276         }
2277         closedir $dh;
2278         $ctags;
2279 }
2280
2281 sub git_populate_project_tagcloud {
2282         my $ctags = shift;
2283
2284         # First, merge different-cased tags; tags vote on casing
2285         my %ctags_lc;
2286         foreach (keys %$ctags) {
2287                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2288                 if (not $ctags_lc{lc $_}->{topcount}
2289                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2290                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2291                         $ctags_lc{lc $_}->{topname} = $_;
2292                 }
2293         }
2294
2295         my $cloud;
2296         if (eval { require HTML::TagCloud; 1; }) {
2297                 $cloud = HTML::TagCloud->new;
2298                 foreach (sort keys %ctags_lc) {
2299                         # Pad the title with spaces so that the cloud looks
2300                         # less crammed.
2301                         my $title = $ctags_lc{$_}->{topname};
2302                         $title =~ s/ /&nbsp;/g;
2303                         $title =~ s/^/&nbsp;/g;
2304                         $title =~ s/$/&nbsp;/g;
2305                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2306                 }
2307         } else {
2308                 $cloud = \%ctags_lc;
2309         }
2310         $cloud;
2311 }
2312
2313 sub git_show_project_tagcloud {
2314         my ($cloud, $count) = @_;
2315         print STDERR ref($cloud)."..\n";
2316         if (ref $cloud eq 'HTML::TagCloud') {
2317                 return $cloud->html_and_css($count);
2318         } else {
2319                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2320                 return '<p align="center">' . join (', ', map {
2321                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2322                 } splice(@tags, 0, $count)) . '</p>';
2323         }
2324 }
2325
2326 sub git_get_project_url_list {
2327         my $path = shift;
2328
2329         $git_dir = "$projectroot/$path";
2330         open my $fd, '<', "$git_dir/cloneurl"
2331                 or return wantarray ?
2332                 @{ config_to_multi(git_get_project_config('url')) } :
2333                    config_to_multi(git_get_project_config('url'));
2334         my @git_project_url_list = map { chomp; $_ } <$fd>;
2335         close $fd;
2336
2337         return wantarray ? @git_project_url_list : \@git_project_url_list;
2338 }
2339
2340 sub git_get_projects_list {
2341         my ($filter) = @_;
2342         my @list;
2343
2344         $filter ||= '';
2345         $filter =~ s/\.git$//;
2346
2347         my $check_forks = gitweb_check_feature('forks');
2348
2349         if (-d $projects_list) {
2350                 # search in directory
2351                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2352                 # remove the trailing "/"
2353                 $dir =~ s!/+$!!;
2354                 my $pfxlen = length("$dir");
2355                 my $pfxdepth = ($dir =~ tr!/!!);
2356
2357                 File::Find::find({
2358                         follow_fast => 1, # follow symbolic links
2359                         follow_skip => 2, # ignore duplicates
2360                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2361                         wanted => sub {
2362                                 # skip project-list toplevel, if we get it.
2363                                 return if (m!^[/.]$!);
2364                                 # only directories can be git repositories
2365                                 return unless (-d $_);
2366                                 # don't traverse too deep (Find is super slow on os x)
2367                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2368                                         $File::Find::prune = 1;
2369                                         return;
2370                                 }
2371
2372                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2373                                 # we check related file in $projectroot
2374                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2375                                 if (check_export_ok("$projectroot/$path")) {
2376                                         push @list, { path => $path };
2377                                         $File::Find::prune = 1;
2378                                 }
2379                         },
2380                 }, "$dir");
2381
2382         } elsif (-f $projects_list) {
2383                 # read from file(url-encoded):
2384                 # 'git%2Fgit.git Linus+Torvalds'
2385                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2386                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2387                 my %paths;
2388                 open my $fd, '<', $projects_list or return;
2389         PROJECT:
2390                 while (my $line = <$fd>) {
2391                         chomp $line;
2392                         my ($path, $owner) = split ' ', $line;
2393                         $path = unescape($path);
2394                         $owner = unescape($owner);
2395                         if (!defined $path) {
2396                                 next;
2397                         }
2398                         if ($filter ne '') {
2399                                 # looking for forks;
2400                                 my $pfx = substr($path, 0, length($filter));
2401                                 if ($pfx ne $filter) {
2402                                         next PROJECT;
2403                                 }
2404                                 my $sfx = substr($path, length($filter));
2405                                 if ($sfx !~ /^\/.*\.git$/) {
2406                                         next PROJECT;
2407                                 }
2408                         } elsif ($check_forks) {
2409                         PATH:
2410                                 foreach my $filter (keys %paths) {
2411                                         # looking for forks;
2412                                         my $pfx = substr($path, 0, length($filter));
2413                                         if ($pfx ne $filter) {
2414                                                 next PATH;
2415                                         }
2416                                         my $sfx = substr($path, length($filter));
2417                                         if ($sfx !~ /^\/.*\.git$/) {
2418                                                 next PATH;
2419                                         }
2420                                         # is a fork, don't include it in
2421                                         # the list
2422                                         next PROJECT;
2423                                 }
2424                         }
2425                         if (check_export_ok("$projectroot/$path")) {
2426                                 my $pr = {
2427                                         path => $path,
2428                                         owner => to_utf8($owner),
2429                                 };
2430                                 push @list, $pr;
2431                                 (my $forks_path = $path) =~ s/\.git$//;
2432                                 $paths{$forks_path}++;
2433                         }
2434                 }
2435                 close $fd;
2436         }
2437         return @list;
2438 }
2439
2440 our $gitweb_project_owner = undef;
2441 sub git_get_project_list_from_file {
2442
2443         return if (defined $gitweb_project_owner);
2444
2445         $gitweb_project_owner = {};
2446         # read from file (url-encoded):
2447         # 'git%2Fgit.git Linus+Torvalds'
2448         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2449         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2450         if (-f $projects_list) {
2451                 open(my $fd, '<', $projects_list);
2452                 while (my $line = <$fd>) {
2453                         chomp $line;
2454                         my ($pr, $ow) = split ' ', $line;
2455                         $pr = unescape($pr);
2456                         $ow = unescape($ow);
2457                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2458                 }
2459                 close $fd;
2460         }
2461 }
2462
2463 sub git_get_project_owner {
2464         my $project = shift;
2465         my $owner;
2466
2467         return undef unless $project;
2468         $git_dir = "$projectroot/$project";
2469
2470         if (!defined $gitweb_project_owner) {
2471                 git_get_project_list_from_file();
2472         }
2473
2474         if (exists $gitweb_project_owner->{$project}) {
2475                 $owner = $gitweb_project_owner->{$project};
2476         }
2477         if (!defined $owner){
2478                 $owner = git_get_project_config('owner');
2479         }
2480         if (!defined $owner) {
2481                 $owner = get_file_owner("$git_dir");
2482         }
2483
2484         return $owner;
2485 }
2486
2487 sub git_get_last_activity {
2488         my ($path) = @_;
2489         my $fd;
2490
2491         $git_dir = "$projectroot/$path";
2492         open($fd, "-|", git_cmd(), 'for-each-ref',
2493              '--format=%(committer)',
2494              '--sort=-committerdate',
2495              '--count=1',
2496              'refs/heads') or return;
2497         my $most_recent = <$fd>;
2498         close $fd or return;
2499         if (defined $most_recent &&
2500             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2501                 my $timestamp = $1;
2502                 my $age = time - $timestamp;
2503                 return ($age, age_string($age));
2504         }
2505         return (undef, undef);
2506 }
2507
2508 sub git_get_references {
2509         my $type = shift || "";
2510         my %refs;
2511         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2512         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2513         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2514                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2515                 or return;
2516
2517         while (my $line = <$fd>) {
2518                 chomp $line;
2519                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2520                         if (defined $refs{$1}) {
2521                                 push @{$refs{$1}}, $2;
2522                         } else {
2523                                 $refs{$1} = [ $2 ];
2524                         }
2525                 }
2526         }
2527         close $fd or return;
2528         return \%refs;
2529 }
2530
2531 sub git_get_rev_name_tags {
2532         my $hash = shift || return undef;
2533
2534         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2535                 or return;
2536         my $name_rev = <$fd>;
2537         close $fd;
2538
2539         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2540                 return $1;
2541         } else {
2542                 # catches also '$hash undefined' output
2543                 return undef;
2544         }
2545 }
2546
2547 ## ----------------------------------------------------------------------
2548 ## parse to hash functions
2549
2550 sub parse_date {
2551         my $epoch = shift;
2552         my $tz = shift || "-0000";
2553
2554         my %date;
2555         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2556         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2557         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2558         $date{'hour'} = $hour;
2559         $date{'minute'} = $min;
2560         $date{'mday'} = $mday;
2561         $date{'day'} = $days[$wday];
2562         $date{'month'} = $months[$mon];
2563         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2564                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2565         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2566                              $mday, $months[$mon], $hour ,$min;
2567         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2568                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2569
2570         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2571         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2572         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2573         $date{'hour_local'} = $hour;
2574         $date{'minute_local'} = $min;
2575         $date{'tz_local'} = $tz;
2576         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2577                                   1900+$year, $mon+1, $mday,
2578                                   $hour, $min, $sec, $tz);
2579         return %date;
2580 }
2581
2582 sub parse_tag {
2583         my $tag_id = shift;
2584         my %tag;
2585         my @comment;
2586
2587         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2588         $tag{'id'} = $tag_id;
2589         while (my $line = <$fd>) {
2590                 chomp $line;
2591                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2592                         $tag{'object'} = $1;
2593                 } elsif ($line =~ m/^type (.+)$/) {
2594                         $tag{'type'} = $1;
2595                 } elsif ($line =~ m/^tag (.+)$/) {
2596                         $tag{'name'} = $1;
2597                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2598                         $tag{'author'} = $1;
2599                         $tag{'author_epoch'} = $2;
2600                         $tag{'author_tz'} = $3;
2601                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2602                                 $tag{'author_name'}  = $1;
2603                                 $tag{'author_email'} = $2;
2604                         } else {
2605                                 $tag{'author_name'} = $tag{'author'};
2606                         }
2607                 } elsif ($line =~ m/--BEGIN/) {
2608                         push @comment, $line;
2609                         last;
2610                 } elsif ($line eq "") {
2611                         last;
2612                 }
2613         }
2614         push @comment, <$fd>;
2615         $tag{'comment'} = \@comment;
2616         close $fd or return;
2617         if (!defined $tag{'name'}) {
2618                 return
2619         };
2620         return %tag
2621 }
2622
2623 sub parse_commit_text {
2624         my ($commit_text, $withparents) = @_;
2625         my @commit_lines = split '\n', $commit_text;
2626         my %co;
2627
2628         pop @commit_lines; # Remove '\0'
2629
2630         if (! @commit_lines) {
2631                 return;
2632         }
2633
2634         my $header = shift @commit_lines;
2635         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2636                 return;
2637         }
2638         ($co{'id'}, my @parents) = split ' ', $header;
2639         while (my $line = shift @commit_lines) {
2640                 last if $line eq "\n";
2641                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2642                         $co{'tree'} = $1;
2643                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2644                         push @parents, $1;
2645                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2646                         $co{'author'} = to_utf8($1);
2647                         $co{'author_epoch'} = $2;
2648                         $co{'author_tz'} = $3;
2649                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2650                                 $co{'author_name'}  = $1;
2651                                 $co{'author_email'} = $2;
2652                         } else {
2653                                 $co{'author_name'} = $co{'author'};
2654                         }
2655                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2656                         $co{'committer'} = to_utf8($1);
2657                         $co{'committer_epoch'} = $2;
2658                         $co{'committer_tz'} = $3;
2659                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2660                                 $co{'committer_name'}  = $1;
2661                                 $co{'committer_email'} = $2;
2662                         } else {
2663                                 $co{'committer_name'} = $co{'committer'};
2664                         }
2665                 }
2666         }
2667         if (!defined $co{'tree'}) {
2668                 return;
2669         };
2670         $co{'parents'} = \@parents;
2671         $co{'parent'} = $parents[0];
2672
2673         foreach my $title (@commit_lines) {
2674                 $title =~ s/^    //;
2675                 if ($title ne "") {
2676                         $co{'title'} = chop_str($title, 80, 5);
2677                         # remove leading stuff of merges to make the interesting part visible
2678                         if (length($title) > 50) {
2679                                 $title =~ s/^Automatic //;
2680                                 $title =~ s/^merge (of|with) /Merge ... /i;
2681                                 if (length($title) > 50) {
2682                                         $title =~ s/(http|rsync):\/\///;
2683                                 }
2684                                 if (length($title) > 50) {
2685                                         $title =~ s/(master|www|rsync)\.//;
2686                                 }
2687                                 if (length($title) > 50) {
2688                                         $title =~ s/kernel.org:?//;
2689                                 }
2690                                 if (length($title) > 50) {
2691                                         $title =~ s/\/pub\/scm//;
2692                                 }
2693                         }
2694                         $co{'title_short'} = chop_str($title, 50, 5);
2695                         last;
2696                 }
2697         }
2698         if (! defined $co{'title'} || $co{'title'} eq "") {
2699                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2700         }
2701         # remove added spaces
2702         foreach my $line (@commit_lines) {
2703                 $line =~ s/^    //;
2704         }
2705         $co{'comment'} = \@commit_lines;
2706
2707         my $age = time - $co{'committer_epoch'};
2708         $co{'age'} = $age;
2709         $co{'age_string'} = age_string($age);
2710         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2711         if ($age > 60*60*24*7*2) {
2712                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2713                 $co{'age_string_age'} = $co{'age_string'};
2714         } else {
2715                 $co{'age_string_date'} = $co{'age_string'};
2716                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2717         }
2718         return %co;
2719 }
2720
2721 sub parse_commit {
2722         my ($commit_id) = @_;
2723         my %co;
2724
2725         local $/ = "\0";
2726
2727         open my $fd, "-|", git_cmd(), "rev-list",
2728                 "--parents",
2729                 "--header",
2730                 "--max-count=1",
2731                 $commit_id,
2732                 "--",
2733                 or die_error(500, "Open git-rev-list failed");
2734         %co = parse_commit_text(<$fd>, 1);
2735         close $fd;
2736
2737         return %co;
2738 }
2739
2740 sub parse_commits {
2741         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2742         my @cos;
2743
2744         $maxcount ||= 1;
2745         $skip ||= 0;
2746
2747         local $/ = "\0";
2748
2749         open my $fd, "-|", git_cmd(), "rev-list",
2750                 "--header",
2751                 @args,
2752                 ("--max-count=" . $maxcount),
2753                 ("--skip=" . $skip),
2754                 @extra_options,
2755                 $commit_id,
2756                 "--",
2757                 ($filename ? ($filename) : ())
2758                 or die_error(500, "Open git-rev-list failed");
2759         while (my $line = <$fd>) {
2760                 my %co = parse_commit_text($line);
2761                 push @cos, \%co;
2762         }
2763         close $fd;
2764
2765         return wantarray ? @cos : \@cos;
2766 }
2767
2768 # parse line of git-diff-tree "raw" output
2769 sub parse_difftree_raw_line {
2770         my $line = shift;
2771         my %res;
2772
2773         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2774         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2775         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2776                 $res{'from_mode'} = $1;
2777                 $res{'to_mode'} = $2;
2778                 $res{'from_id'} = $3;
2779                 $res{'to_id'} = $4;
2780                 $res{'status'} = $5;
2781                 $res{'similarity'} = $6;
2782                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2783                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2784                 } else {
2785                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2786                 }
2787         }
2788         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2789         # combined diff (for merge commit)
2790         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2791                 $res{'nparents'}  = length($1);
2792                 $res{'from_mode'} = [ split(' ', $2) ];
2793                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2794                 $res{'from_id'} = [ split(' ', $3) ];
2795                 $res{'to_id'} = pop @{$res{'from_id'}};
2796                 $res{'status'} = [ split('', $4) ];
2797                 $res{'to_file'} = unquote($5);
2798         }
2799         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2800         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2801                 $res{'commit'} = $1;
2802         }
2803
2804         return wantarray ? %res : \%res;
2805 }
2806
2807 # wrapper: return parsed line of git-diff-tree "raw" output
2808 # (the argument might be raw line, or parsed info)
2809 sub parsed_difftree_line {
2810         my $line_or_ref = shift;
2811
2812         if (ref($line_or_ref) eq "HASH") {
2813                 # pre-parsed (or generated by hand)
2814                 return $line_or_ref;
2815         } else {
2816                 return parse_difftree_raw_line($line_or_ref);
2817         }
2818 }
2819
2820 # parse line of git-ls-tree output
2821 sub parse_ls_tree_line {
2822         my $line = shift;
2823         my %opts = @_;
2824         my %res;
2825
2826         if ($opts{'-l'}) {
2827                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2828                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2829
2830                 $res{'mode'} = $1;
2831                 $res{'type'} = $2;
2832                 $res{'hash'} = $3;
2833                 $res{'size'} = $4;
2834                 if ($opts{'-z'}) {
2835                         $res{'name'} = $5;
2836                 } else {
2837                         $res{'name'} = unquote($5);
2838                 }
2839         } else {
2840                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2841                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2842
2843                 $res{'mode'} = $1;
2844                 $res{'type'} = $2;
2845                 $res{'hash'} = $3;
2846                 if ($opts{'-z'}) {
2847                         $res{'name'} = $4;
2848                 } else {
2849                         $res{'name'} = unquote($4);
2850                 }
2851         }
2852
2853         return wantarray ? %res : \%res;
2854 }
2855
2856 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2857 sub parse_from_to_diffinfo {
2858         my ($diffinfo, $from, $to, @parents) = @_;
2859
2860         if ($diffinfo->{'nparents'}) {
2861                 # combined diff
2862                 $from->{'file'} = [];
2863                 $from->{'href'} = [];
2864                 fill_from_file_info($diffinfo, @parents)
2865                         unless exists $diffinfo->{'from_file'};
2866                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2867                         $from->{'file'}[$i] =
2868                                 defined $diffinfo->{'from_file'}[$i] ?
2869                                         $diffinfo->{'from_file'}[$i] :
2870                                         $diffinfo->{'to_file'};
2871                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2872                                 $from->{'href'}[$i] = href(action=>"blob",
2873                                                            hash_base=>$parents[$i],
2874                                                            hash=>$diffinfo->{'from_id'}[$i],
2875                                                            file_name=>$from->{'file'}[$i]);
2876                         } else {
2877                                 $from->{'href'}[$i] = undef;
2878                         }
2879                 }
2880         } else {
2881                 # ordinary (not combined) diff
2882                 $from->{'file'} = $diffinfo->{'from_file'};
2883                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2884                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2885                                                hash=>$diffinfo->{'from_id'},
2886                                                file_name=>$from->{'file'});
2887                 } else {
2888                         delete $from->{'href'};
2889                 }
2890         }
2891
2892         $to->{'file'} = $diffinfo->{'to_file'};
2893         if (!is_deleted($diffinfo)) { # file exists in result
2894                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2895                                      hash=>$diffinfo->{'to_id'},
2896                                      file_name=>$to->{'file'});
2897         } else {
2898                 delete $to->{'href'};
2899         }
2900 }
2901
2902 ## ......................................................................
2903 ## parse to array of hashes functions
2904
2905 sub git_get_heads_list {
2906         my $limit = shift;
2907         my @headslist;
2908
2909         open my $fd, '-|', git_cmd(), 'for-each-ref',
2910                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2911                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2912                 'refs/heads'
2913                 or return;
2914         while (my $line = <$fd>) {
2915                 my %ref_item;
2916
2917                 chomp $line;
2918                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2919                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2920                 my ($committer, $epoch, $tz) =
2921                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2922                 $ref_item{'fullname'}  = $name;
2923                 $name =~ s!^refs/heads/!!;
2924
2925                 $ref_item{'name'}  = $name;
2926                 $ref_item{'id'}    = $hash;
2927                 $ref_item{'title'} = $title || '(no commit message)';
2928                 $ref_item{'epoch'} = $epoch;
2929                 if ($epoch) {
2930                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2931                 } else {
2932                         $ref_item{'age'} = "unknown";
2933                 }
2934
2935                 push @headslist, \%ref_item;
2936         }
2937         close $fd;
2938
2939         return wantarray ? @headslist : \@headslist;
2940 }
2941
2942 sub git_get_tags_list {
2943         my $limit = shift;
2944         my @tagslist;
2945
2946         open my $fd, '-|', git_cmd(), 'for-each-ref',
2947                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2948                 '--format=%(objectname) %(objecttype) %(refname) '.
2949                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2950                 'refs/tags'
2951                 or return;
2952         while (my $line = <$fd>) {
2953                 my %ref_item;
2954
2955                 chomp $line;
2956                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2957                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2958                 my ($creator, $epoch, $tz) =
2959                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2960                 $ref_item{'fullname'} = $name;
2961                 $name =~ s!^refs/tags/!!;
2962
2963                 $ref_item{'type'} = $type;
2964                 $ref_item{'id'} = $id;
2965                 $ref_item{'name'} = $name;
2966                 if ($type eq "tag") {
2967                         $ref_item{'subject'} = $title;
2968                         $ref_item{'reftype'} = $reftype;
2969                         $ref_item{'refid'}   = $refid;
2970                 } else {
2971                         $ref_item{'reftype'} = $type;
2972                         $ref_item{'refid'}   = $id;
2973                 }
2974
2975                 if ($type eq "tag" || $type eq "commit") {
2976                         $ref_item{'epoch'} = $epoch;
2977                         if ($epoch) {
2978                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2979                         } else {
2980                                 $ref_item{'age'} = "unknown";
2981                         }
2982                 }
2983
2984                 push @tagslist, \%ref_item;
2985         }
2986         close $fd;
2987
2988         return wantarray ? @tagslist : \@tagslist;
2989 }
2990
2991 ## ----------------------------------------------------------------------
2992 ## filesystem-related functions
2993
2994 sub get_file_owner {
2995         my $path = shift;
2996
2997         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2998         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2999         if (!defined $gcos) {
3000                 return undef;
3001         }
3002         my $owner = $gcos;
3003         $owner =~ s/[,;].*$//;
3004         return to_utf8($owner);
3005 }
3006
3007 # assume that file exists
3008 sub insert_file {
3009         my $filename = shift;
3010
3011         open my $fd, '<', $filename;
3012         print map { to_utf8($_) } <$fd>;
3013         close $fd;
3014 }
3015
3016 ## ......................................................................
3017 ## mimetype related functions
3018
3019 sub mimetype_guess_file {
3020         my $filename = shift;
3021         my $mimemap = shift;
3022         -r $mimemap or return undef;
3023
3024         my %mimemap;
3025         open(my $mh, '<', $mimemap) or return undef;
3026         while (<$mh>) {
3027                 next if m/^#/; # skip comments
3028                 my ($mimetype, $exts) = split(/\t+/);
3029                 if (defined $exts) {
3030                         my @exts = split(/\s+/, $exts);
3031                         foreach my $ext (@exts) {
3032                                 $mimemap{$ext} = $mimetype;
3033                         }
3034                 }
3035         }
3036         close($mh);
3037
3038         $filename =~ /\.([^.]*)$/;
3039         return $mimemap{$1};
3040 }
3041
3042 sub mimetype_guess {
3043         my $filename = shift;
3044         my $mime;
3045         $filename =~ /\./ or return undef;
3046
3047         if ($mimetypes_file) {
3048                 my $file = $mimetypes_file;
3049                 if ($file !~ m!^/!) { # if it is relative path
3050                         # it is relative to project
3051                         $file = "$projectroot/$project/$file";
3052                 }
3053                 $mime = mimetype_guess_file($filename, $file);
3054         }
3055         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3056         return $mime;
3057 }
3058
3059 sub blob_mimetype {
3060         my $fd = shift;
3061         my $filename = shift;
3062
3063         if ($filename) {
3064                 my $mime = mimetype_guess($filename);
3065                 $mime and return $mime;
3066         }
3067
3068         # just in case
3069         return $default_blob_plain_mimetype unless $fd;
3070
3071         if (-T $fd) {
3072                 return 'text/plain';
3073         } elsif (! $filename) {
3074                 return 'application/octet-stream';
3075         } elsif ($filename =~ m/\.png$/i) {
3076                 return 'image/png';
3077         } elsif ($filename =~ m/\.gif$/i) {
3078                 return 'image/gif';
3079         } elsif ($filename =~ m/\.jpe?g$/i) {
3080                 return 'image/jpeg';
3081         } else {
3082                 return 'application/octet-stream';
3083         }
3084 }
3085
3086 sub blob_contenttype {
3087         my ($fd, $file_name, $type) = @_;
3088
3089         $type ||= blob_mimetype($fd, $file_name);
3090         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3091                 $type .= "; charset=$default_text_plain_charset";
3092         }
3093
3094         return $type;
3095 }
3096
3097 ## ======================================================================
3098 ## functions printing HTML: header, footer, error page
3099
3100 sub git_header_html {
3101         my $status = shift || "200 OK";
3102         my $expires = shift;
3103
3104         my $title = "$site_name";
3105         if (defined $project) {
3106                 $title .= " - " . to_utf8($project);
3107                 if (defined $action) {
3108                         $title .= "/$action";
3109                         if (defined $file_name) {
3110                                 $title .= " - " . esc_path($file_name);
3111                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3112                                         $title .= "/";
3113                                 }
3114                         }
3115                 }
3116         }
3117         my $content_type;
3118         # require explicit support from the UA if we are to send the page as
3119         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3120         # we have to do this because MSIE sometimes globs '*/*', pretending to
3121         # support xhtml+xml but choking when it gets what it asked for.
3122         if (defined $cgi->http('HTTP_ACCEPT') &&
3123             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3124             $cgi->Accept('application/xhtml+xml') != 0) {
3125                 $content_type = 'application/xhtml+xml';
3126         } else {
3127                 $content_type = 'text/html';
3128         }
3129         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3130                            -status=> $status, -expires => $expires);
3131         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3132         print <<EOF;
3133 <?xml version="1.0" encoding="utf-8"?>
3134 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3135 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3136 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3137 <!-- git core binaries version $git_version -->
3138 <head>
3139 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3140 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3141 <meta name="robots" content="index, nofollow"/>
3142 <title>$title</title>
3143 EOF
3144         # the stylesheet, favicon etc urls won't work correctly with path_info
3145         # unless we set the appropriate base URL
3146         if ($ENV{'PATH_INFO'}) {
3147                 print "<base href=\"".esc_url($base_url)."\" />\n";
3148         }
3149         # print out each stylesheet that exist, providing backwards capability
3150         # for those people who defined $stylesheet in a config file
3151         if (defined $stylesheet) {
3152                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3153         } else {
3154                 foreach my $stylesheet (@stylesheets) {
3155                         next unless $stylesheet;
3156                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3157                 }
3158         }
3159         if (defined $project) {
3160                 my %href_params = get_feed_info();
3161                 if (!exists $href_params{'-title'}) {
3162                         $href_params{'-title'} = 'log';
3163                 }
3164
3165                 foreach my $format qw(RSS Atom) {
3166                         my $type = lc($format);
3167                         my %link_attr = (
3168                                 '-rel' => 'alternate',
3169                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3170                                 '-type' => "application/$type+xml"
3171                         );
3172
3173                         $href_params{'action'} = $type;
3174                         $link_attr{'-href'} = href(%href_params);
3175                         print "<link ".
3176                               "rel=\"$link_attr{'-rel'}\" ".
3177                               "title=\"$link_attr{'-title'}\" ".
3178                               "href=\"$link_attr{'-href'}\" ".
3179                               "type=\"$link_attr{'-type'}\" ".
3180                               "/>\n";
3181
3182                         $href_params{'extra_options'} = '--no-merges';
3183                         $link_attr{'-href'} = href(%href_params);
3184                         $link_attr{'-title'} .= ' (no merges)';
3185                         print "<link ".
3186                               "rel=\"$link_attr{'-rel'}\" ".
3187                               "title=\"$link_attr{'-title'}\" ".
3188                               "href=\"$link_attr{'-href'}\" ".
3189                               "type=\"$link_attr{'-type'}\" ".
3190                               "/>\n";
3191                 }
3192
3193         } else {
3194                 printf('<link rel="alternate" title="%s projects list" '.
3195                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3196                        $site_name, href(project=>undef, action=>"project_index"));
3197                 printf('<link rel="alternate" title="%s projects feeds" '.
3198                        'href="%s" type="text/x-opml" />'."\n",
3199                        $site_name, href(project=>undef, action=>"opml"));
3200         }
3201         if (defined $favicon) {
3202                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3203         }
3204
3205         print "</head>\n" .
3206               "<body>\n";
3207
3208         if (-f $site_header) {
3209                 insert_file($site_header);
3210         }
3211
3212         print "<div class=\"page_header\">\n" .
3213               $cgi->a({-href => esc_url($logo_url),
3214                        -title => $logo_label},
3215                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3216         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3217         if (defined $project) {
3218                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3219                 if (defined $action) {
3220                         print " / $action";
3221                 }
3222                 print "\n";
3223         }
3224         print "</div>\n";
3225
3226         my $have_search = gitweb_check_feature('search');
3227         if (defined $project && $have_search) {
3228                 if (!defined $searchtext) {
3229                         $searchtext = "";
3230                 }
3231                 my $search_hash;
3232                 if (defined $hash_base) {
3233                         $search_hash = $hash_base;
3234                 } elsif (defined $hash) {
3235                         $search_hash = $hash;
3236                 } else {
3237                         $search_hash = "HEAD";
3238                 }
3239                 my $action = $my_uri;
3240                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3241                 if ($use_pathinfo) {
3242                         $action .= "/".esc_url($project);
3243                 }
3244                 print $cgi->startform(-method => "get", -action => $action) .
3245                       "<div class=\"search\">\n" .
3246                       (!$use_pathinfo &&
3247                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3248                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3249                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3250                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3251                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3252                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3253                       " search:\n",
3254                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3255                       "<span title=\"Extended regular expression\">" .
3256                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3257                                      -checked => $search_use_regexp) .
3258                       "</span>" .
3259                       "</div>" .
3260                       $cgi->end_form() . "\n";
3261         }
3262 }
3263
3264 sub git_footer_html {
3265         my $feed_class = 'rss_logo';
3266
3267         print "<div class=\"page_footer\">\n";
3268         if (defined $project) {
3269                 my $descr = git_get_project_description($project);
3270                 if (defined $descr) {
3271                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3272                 }
3273
3274                 my %href_params = get_feed_info();
3275                 if (!%href_params) {
3276                         $feed_class .= ' generic';
3277                 }
3278                 $href_params{'-title'} ||= 'log';
3279
3280                 foreach my $format qw(RSS Atom) {
3281                         $href_params{'action'} = lc($format);
3282                         print $cgi->a({-href => href(%href_params),
3283                                       -title => "$href_params{'-title'} $format feed",
3284                                       -class => $feed_class}, $format)."\n";
3285                 }
3286
3287         } else {
3288                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3289                               -class => $feed_class}, "OPML") . " ";
3290                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3291                               -class => $feed_class}, "TXT") . "\n";
3292         }
3293         print "</div>\n"; # class="page_footer"
3294
3295         if (defined $t0 && gitweb_check_feature('timed')) {
3296                 print "<div id=\"generating_info\">\n";
3297                 print 'This page took '.
3298                       '<span id="generating_time" class="time_span">'.
3299                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3300                       ' seconds </span>'.
3301                       ' and '.
3302                       '<span id="generating_cmd">'.
3303                       $number_of_git_cmds.
3304                       '</span> git commands '.
3305                       " to generate.\n";
3306                 print "</div>\n"; # class="page_footer"
3307         }
3308
3309         if (-f $site_footer) {
3310                 insert_file($site_footer);
3311         }
3312
3313         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3314         if ($action eq 'blame_incremental') {
3315                 print qq!<script type="text/javascript">\n!.
3316                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3317                       qq!           "!. href() .qq!");\n!.
3318                       qq!</script>\n!;
3319         } else {
3320                 print qq!<script type="text/javascript">\n!.
3321                       qq!window.onload = fixLinks;\n!.
3322                       qq!</script>\n!;
3323         }
3324
3325         print "</body>\n" .
3326               "</html>";
3327 }
3328
3329 # die_error(<http_status_code>, <error_message>)
3330 # Example: die_error(404, 'Hash not found')
3331 # By convention, use the following status codes (as defined in RFC 2616):
3332 # 400: Invalid or missing CGI parameters, or
3333 #      requested object exists but has wrong type.
3334 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3335 #      this server or project.
3336 # 404: Requested object/revision/project doesn't exist.
3337 # 500: The server isn't configured properly, or
3338 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3339 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3340 sub die_error {
3341         my $status = shift || 500;
3342         my $error = shift || "Internal server error";
3343
3344         my %http_responses = (400 => '400 Bad Request',
3345                               403 => '403 Forbidden',
3346                               404 => '404 Not Found',
3347                               500 => '500 Internal Server Error');
3348         git_header_html($http_responses{$status});
3349         print <<EOF;
3350 <div class="page_body">
3351 <br /><br />
3352 $status - $error
3353 <br />
3354 </div>
3355 EOF
3356         git_footer_html();
3357         exit;
3358 }
3359
3360 ## ----------------------------------------------------------------------
3361 ## functions printing or outputting HTML: navigation
3362
3363 sub git_print_page_nav {
3364         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3365         $extra = '' if !defined $extra; # pager or formats
3366
3367         my @navs = qw(summary shortlog log commit commitdiff tree);
3368         if ($suppress) {
3369                 @navs = grep { $_ ne $suppress } @navs;
3370         }
3371
3372         my %arg = map { $_ => {action=>$_} } @navs;
3373         if (defined $head) {
3374                 for (qw(commit commitdiff)) {
3375                         $arg{$_}{'hash'} = $head;
3376                 }
3377                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3378                         for (qw(shortlog log)) {
3379                                 $arg{$_}{'hash'} = $head;
3380                         }
3381                 }
3382         }
3383
3384         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3385         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3386
3387         my @actions = gitweb_get_feature('actions');
3388         my %repl = (
3389                 '%' => '%',
3390                 'n' => $project,         # project name
3391                 'f' => $git_dir,         # project path within filesystem
3392                 'h' => $treehead || '',  # current hash ('h' parameter)
3393                 'b' => $treebase || '',  # hash base ('hb' parameter)
3394         );
3395         while (@actions) {
3396                 my ($label, $link, $pos) = splice(@actions,0,3);
3397                 # insert
3398                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3399                 # munch munch
3400                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3401                 $arg{$label}{'_href'} = $link;
3402         }
3403
3404         print "<div class=\"page_nav\">\n" .
3405                 (join " | ",
3406                  map { $_ eq $current ?
3407                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3408                  } @navs);
3409         print "<br/>\n$extra<br/>\n" .
3410               "</div>\n";
3411 }
3412
3413 sub format_paging_nav {
3414         my ($action, $hash, $head, $page, $has_next_link) = @_;
3415         my $paging_nav;
3416
3417
3418         if ($hash ne $head || $page) {
3419                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3420         } else {
3421                 $paging_nav .= "HEAD";
3422         }
3423
3424         if ($page > 0) {
3425                 $paging_nav .= " &sdot; " .
3426                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3427                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3428         } else {
3429                 $paging_nav .= " &sdot; prev";
3430         }
3431
3432         if ($has_next_link) {
3433                 $paging_nav .= " &sdot; " .
3434                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3435                                  -accesskey => "n", -title => "Alt-n"}, "next");
3436         } else {
3437                 $paging_nav .= " &sdot; next";
3438         }
3439
3440         return $paging_nav;
3441 }
3442
3443 ## ......................................................................
3444 ## functions printing or outputting HTML: div
3445
3446 sub git_print_header_div {
3447         my ($action, $title, $hash, $hash_base) = @_;
3448         my %args = ();
3449
3450         $args{'action'} = $action;
3451         $args{'hash'} = $hash if $hash;
3452         $args{'hash_base'} = $hash_base if $hash_base;
3453
3454         print "<div class=\"header\">\n" .
3455               $cgi->a({-href => href(%args), -class => "title"},
3456               $title ? $title : $action) .
3457               "\n</div>\n";
3458 }
3459
3460 sub print_local_time {
3461         my %date = @_;
3462         if ($date{'hour_local'} < 6) {
3463                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3464                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3465         } else {
3466                 printf(" (%02d:%02d %s)",
3467                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3468         }
3469 }
3470
3471 # Outputs the author name and date in long form
3472 sub git_print_authorship {
3473         my $co = shift;
3474         my %opts = @_;
3475         my $tag = $opts{-tag} || 'div';
3476         my $author = $co->{'author_name'};
3477
3478         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3479         print "<$tag class=\"author_date\">" .
3480               format_search_author($author, "author", esc_html($author)) .
3481               " [$ad{'rfc2822'}";
3482         print_local_time(%ad) if ($opts{-localtime});
3483         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3484                   . "</$tag>\n";
3485 }
3486
3487 # Outputs table rows containing the full author or committer information,
3488 # in the format expected for 'commit' view (& similia).
3489 # Parameters are a commit hash reference, followed by the list of people
3490 # to output information for. If the list is empty it defalts to both
3491 # author and committer.
3492 sub git_print_authorship_rows {
3493         my $co = shift;
3494         # too bad we can't use @people = @_ || ('author', 'committer')
3495         my @people = @_;
3496         @people = ('author', 'committer') unless @people;
3497         foreach my $who (@people) {
3498                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3499                 print "<tr><td>$who</td><td>" .
3500                       format_search_author($co->{"${who}_name"}, $who,
3501                                esc_html($co->{"${who}_name"})) . " " .
3502                       format_search_author($co->{"${who}_email"}, $who,
3503                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3504                       "</td><td rowspan=\"2\">" .
3505                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3506                       "</td></tr>\n" .
3507                       "<tr>" .
3508                       "<td></td><td> $wd{'rfc2822'}";
3509                 print_local_time(%wd);
3510                 print "</td>" .
3511                       "</tr>\n";
3512         }
3513 }
3514
3515 sub git_print_page_path {
3516         my $name = shift;
3517         my $type = shift;
3518         my $hb = shift;
3519
3520
3521         print "<div class=\"page_path\">";
3522         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3523                       -title => 'tree root'}, to_utf8("[$project]"));
3524         print " / ";
3525         if (defined $name) {
3526                 my @dirname = split '/', $name;
3527                 my $basename = pop @dirname;
3528                 my $fullname = '';
3529
3530                 foreach my $dir (@dirname) {
3531                         $fullname .= ($fullname ? '/' : '') . $dir;
3532                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3533                                                      hash_base=>$hb),
3534                                       -title => $fullname}, esc_path($dir));
3535                         print " / ";
3536                 }
3537                 if (defined $type && $type eq 'blob') {
3538                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3539                                                      hash_base=>$hb),
3540                                       -title => $name}, esc_path($basename));
3541                 } elsif (defined $type && $type eq 'tree') {
3542                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3543                                                      hash_base=>$hb),
3544                                       -title => $name}, esc_path($basename));
3545                         print " / ";
3546                 } else {
3547                         print esc_path($basename);
3548                 }
3549         }
3550         print "<br/></div>\n";
3551 }
3552
3553 sub git_print_log {
3554         my $log = shift;
3555         my %opts = @_;
3556
3557         if ($opts{'-remove_title'}) {
3558                 # remove title, i.e. first line of log
3559                 shift @$log;
3560         }
3561         # remove leading empty lines
3562         while (defined $log->[0] && $log->[0] eq "") {
3563                 shift @$log;
3564         }
3565
3566         # print log
3567         my $signoff = 0;
3568         my $empty = 0;
3569         foreach my $line (@$log) {
3570                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3571                         $signoff = 1;
3572                         $empty = 0;
3573                         if (! $opts{'-remove_signoff'}) {
3574                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3575                                 next;
3576                         } else {
3577                                 # remove signoff lines
3578                                 next;
3579                         }
3580                 } else {
3581                         $signoff = 0;
3582                 }
3583
3584                 # print only one empty line
3585                 # do not print empty line after signoff
3586                 if ($line eq "") {
3587                         next if ($empty || $signoff);
3588                         $empty = 1;
3589                 } else {
3590                         $empty = 0;
3591                 }
3592
3593                 print format_log_line_html($line) . "<br/>\n";
3594         }
3595
3596         if ($opts{'-final_empty_line'}) {
3597                 # end with single empty line
3598                 print "<br/>\n" unless $empty;
3599         }
3600 }
3601
3602 # return link target (what link points to)
3603 sub git_get_link_target {
3604         my $hash = shift;
3605         my $link_target;
3606
3607         # read link
3608         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3609                 or return;
3610         {
3611                 local $/ = undef;
3612                 $link_target = <$fd>;
3613         }
3614         close $fd
3615                 or return;
3616
3617         return $link_target;
3618 }
3619
3620 # given link target, and the directory (basedir) the link is in,
3621 # return target of link relative to top directory (top tree);
3622 # return undef if it is not possible (including absolute links).
3623 sub normalize_link_target {
3624         my ($link_target, $basedir) = @_;
3625
3626         # absolute symlinks (beginning with '/') cannot be normalized
3627         return if (substr($link_target, 0, 1) eq '/');
3628
3629         # normalize link target to path from top (root) tree (dir)
3630         my $path;
3631         if ($basedir) {
3632                 $path = $basedir . '/' . $link_target;
3633         } else {
3634                 # we are in top (root) tree (dir)
3635                 $path = $link_target;
3636         }
3637
3638         # remove //, /./, and /../
3639         my @path_parts;
3640         foreach my $part (split('/', $path)) {
3641                 # discard '.' and ''
3642                 next if (!$part || $part eq '.');
3643                 # handle '..'
3644                 if ($part eq '..') {
3645                         if (@path_parts) {
3646                                 pop @path_parts;
3647                         } else {
3648                                 # link leads outside repository (outside top dir)
3649                                 return;
3650                         }
3651                 } else {
3652                         push @path_parts, $part;
3653                 }
3654         }
3655         $path = join('/', @path_parts);
3656
3657         return $path;
3658 }
3659
3660 # print tree entry (row of git_tree), but without encompassing <tr> element
3661 sub git_print_tree_entry {
3662         my ($t, $basedir, $hash_base, $have_blame) = @_;
3663
3664         my %base_key = ();
3665         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3666
3667         # The format of a table row is: mode list link.  Where mode is
3668         # the mode of the entry, list is the name of the entry, an href,
3669         # and link is the action links of the entry.
3670
3671         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3672         if (exists $t->{'size'}) {
3673                 print "<td class=\"size\">$t->{'size'}</td>\n";
3674         }
3675         if ($t->{'type'} eq "blob") {
3676                 print "<td class=\"list\">" .
3677                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3678                                                file_name=>"$basedir$t->{'name'}", %base_key),
3679                                 -class => "list"}, esc_path($t->{'name'}));
3680                 if (S_ISLNK(oct $t->{'mode'})) {
3681                         my $link_target = git_get_link_target($t->{'hash'});
3682                         if ($link_target) {
3683                                 my $norm_target = normalize_link_target($link_target, $basedir);
3684                                 if (defined $norm_target) {
3685                                         print " -> " .
3686                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3687                                                                      file_name=>$norm_target),
3688                                                        -title => $norm_target}, esc_path($link_target));
3689                                 } else {
3690                                         print " -> " . esc_path($link_target);
3691                                 }
3692                         }
3693                 }
3694                 print "</td>\n";
3695                 print "<td class=\"link\">";
3696                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3697                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3698                               "blob");
3699                 if ($have_blame) {
3700                         print " | " .
3701                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3702                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3703                                       "blame");
3704                 }
3705                 if (defined $hash_base) {
3706                         print " | " .
3707                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3708                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3709                                       "history");
3710                 }
3711                 print " | " .
3712                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3713                                                file_name=>"$basedir$t->{'name'}")},
3714                                 "raw");
3715                 print "</td>\n";
3716
3717         } elsif ($t->{'type'} eq "tree") {
3718                 print "<td class=\"list\">";
3719                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3720                                              file_name=>"$basedir$t->{'name'}",
3721                                              %base_key)},
3722                               esc_path($t->{'name'}));
3723                 print "</td>\n";
3724                 print "<td class=\"link\">";
3725                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3726                                              file_name=>"$basedir$t->{'name'}",
3727                                              %base_key)},
3728                               "tree");
3729                 if (defined $hash_base) {
3730                         print " | " .
3731                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3732                                                      file_name=>"$basedir$t->{'name'}")},
3733                                       "history");
3734                 }
3735                 print "</td>\n";
3736         } else {
3737                 # unknown object: we can only present history for it
3738                 # (this includes 'commit' object, i.e. submodule support)
3739                 print "<td class=\"list\">" .
3740                       esc_path($t->{'name'}) .
3741                       "</td>\n";
3742                 print "<td class=\"link\">";
3743                 if (defined $hash_base) {
3744                         print $cgi->a({-href => href(action=>"history",
3745                                                      hash_base=>$hash_base,
3746                                                      file_name=>"$basedir$t->{'name'}")},
3747                                       "history");
3748                 }
3749                 print "</td>\n";
3750         }
3751 }
3752
3753 ## ......................................................................
3754 ## functions printing large fragments of HTML
3755
3756 # get pre-image filenames for merge (combined) diff
3757 sub fill_from_file_info {
3758         my ($diff, @parents) = @_;
3759
3760         $diff->{'from_file'} = [ ];
3761         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3762         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3763                 if ($diff->{'status'}[$i] eq 'R' ||
3764                     $diff->{'status'}[$i] eq 'C') {
3765                         $diff->{'from_file'}[$i] =
3766                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3767                 }
3768         }
3769
3770         return $diff;
3771 }
3772
3773 # is current raw difftree line of file deletion
3774 sub is_deleted {
3775         my $diffinfo = shift;
3776
3777         return $diffinfo->{'to_id'} eq ('0' x 40);
3778 }
3779
3780 # does patch correspond to [previous] difftree raw line
3781 # $diffinfo  - hashref of parsed raw diff format
3782 # $patchinfo - hashref of parsed patch diff format
3783 #              (the same keys as in $diffinfo)
3784 sub is_patch_split {
3785         my ($diffinfo, $patchinfo) = @_;
3786
3787         return defined $diffinfo && defined $patchinfo
3788                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3789 }
3790
3791
3792 sub git_difftree_body {
3793         my ($difftree, $hash, @parents) = @_;
3794         my ($parent) = $parents[0];
3795         my $have_blame = gitweb_check_feature('blame');
3796         print "<div class=\"list_head\">\n";
3797         if ($#{$difftree} > 10) {
3798                 print(($#{$difftree} + 1) . " files changed:\n");
3799         }
3800         print "</div>\n";
3801
3802         print "<table class=\"" .
3803               (@parents > 1 ? "combined " : "") .
3804               "diff_tree\">\n";
3805
3806         # header only for combined diff in 'commitdiff' view
3807         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3808         if ($has_header) {
3809                 # table header
3810                 print "<thead><tr>\n" .
3811                        "<th></th><th></th>\n"; # filename, patchN link
3812                 for (my $i = 0; $i < @parents; $i++) {
3813                         my $par = $parents[$i];
3814                         print "<th>" .
3815                               $cgi->a({-href => href(action=>"commitdiff",
3816                                                      hash=>$hash, hash_parent=>$par),
3817                                        -title => 'commitdiff to parent number ' .
3818                                                   ($i+1) . ': ' . substr($par,0,7)},
3819                                       $i+1) .
3820                               "&nbsp;</th>\n";
3821                 }
3822                 print "</tr></thead>\n<tbody>\n";
3823         }
3824
3825         my $alternate = 1;
3826         my $patchno = 0;
3827         foreach my $line (@{$difftree}) {
3828                 my $diff = parsed_difftree_line($line);
3829
3830                 if ($alternate) {
3831                         print "<tr class=\"dark\">\n";
3832                 } else {
3833                         print "<tr class=\"light\">\n";
3834                 }
3835                 $alternate ^= 1;
3836
3837                 if (exists $diff->{'nparents'}) { # combined diff
3838
3839                         fill_from_file_info($diff, @parents)
3840                                 unless exists $diff->{'from_file'};
3841
3842                         if (!is_deleted($diff)) {
3843                                 # file exists in the result (child) commit
3844                                 print "<td>" .
3845                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3846                                                              file_name=>$diff->{'to_file'},
3847                                                              hash_base=>$hash),
3848                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3849                                       "</td>\n";
3850                         } else {
3851                                 print "<td>" .
3852                                       esc_path($diff->{'to_file'}) .
3853                                       "</td>\n";
3854                         }
3855
3856                         if ($action eq 'commitdiff') {
3857                                 # link to patch
3858                                 $patchno++;
3859                                 print "<td class=\"link\">" .
3860                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3861                                       " | " .
3862                                       "</td>\n";
3863                         }
3864
3865                         my $has_history = 0;
3866                         my $not_deleted = 0;
3867                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3868                                 my $hash_parent = $parents[$i];
3869                                 my $from_hash = $diff->{'from_id'}[$i];
3870                                 my $from_path = $diff->{'from_file'}[$i];
3871                                 my $status = $diff->{'status'}[$i];
3872
3873                                 $has_history ||= ($status ne 'A');
3874                                 $not_deleted ||= ($status ne 'D');
3875
3876                                 if ($status eq 'A') {
3877                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3878                                 } elsif ($status eq 'D') {
3879                                         print "<td class=\"link\">" .
3880                                               $cgi->a({-href => href(action=>"blob",
3881                                                                      hash_base=>$hash,
3882                                                                      hash=>$from_hash,
3883                                                                      file_name=>$from_path)},
3884                                                       "blob" . ($i+1)) .
3885                                               " | </td>\n";
3886                                 } else {
3887                                         if ($diff->{'to_id'} eq $from_hash) {
3888                                                 print "<td class=\"link nochange\">";
3889                                         } else {
3890                                                 print "<td class=\"link\">";
3891                                         }
3892                                         print $cgi->a({-href => href(action=>"blobdiff",
3893                                                                      hash=>$diff->{'to_id'},
3894                                                                      hash_parent=>$from_hash,
3895                                                                      hash_base=>$hash,
3896                                                                      hash_parent_base=>$hash_parent,
3897                                                                      file_name=>$diff->{'to_file'},
3898                                                                      file_parent=>$from_path)},
3899                                                       "diff" . ($i+1)) .
3900                                               " | </td>\n";
3901                                 }
3902                         }
3903
3904                         print "<td class=\"link\">";
3905                         if ($not_deleted) {
3906                                 print $cgi->a({-href => href(action=>"blob",
3907                                                              hash=>$diff->{'to_id'},
3908                                                              file_name=>$diff->{'to_file'},
3909                                                              hash_base=>$hash)},
3910                                               "blob");
3911                                 print " | " if ($has_history);
3912                         }
3913                         if ($has_history) {
3914                                 print $cgi->a({-href => href(action=>"history",
3915                                                              file_name=>$diff->{'to_file'},
3916                                                              hash_base=>$hash)},
3917                                               "history");
3918                         }
3919                         print "</td>\n";
3920
3921                         print "</tr>\n";
3922                         next; # instead of 'else' clause, to avoid extra indent
3923                 }
3924                 # else ordinary diff
3925
3926                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3927                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3928                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3929                         $to_mode_oct = oct $diff->{'to_mode'};
3930                         if (S_ISREG($to_mode_oct)) { # only for regular file
3931                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3932                         }
3933                         $to_file_type = file_type($diff->{'to_mode'});
3934                 }
3935                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3936                         $from_mode_oct = oct $diff->{'from_mode'};
3937                         if (S_ISREG($to_mode_oct)) { # only for regular file
3938                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3939                         }
3940                         $from_file_type = file_type($diff->{'from_mode'});
3941                 }
3942
3943                 if ($diff->{'status'} eq "A") { # created
3944                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3945                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3946                         $mode_chng   .= "]</span>";
3947                         print "<td>";
3948                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3949                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3950                                       -class => "list"}, esc_path($diff->{'file'}));
3951                         print "</td>\n";
3952                         print "<td>$mode_chng</td>\n";
3953                         print "<td class=\"link\">";
3954                         if ($action eq 'commitdiff') {
3955                                 # link to patch
3956                                 $patchno++;
3957                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3958                                 print " | ";
3959                         }
3960                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3961                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3962                                       "blob");
3963                         print "</td>\n";
3964
3965                 } elsif ($diff->{'status'} eq "D") { # deleted
3966                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3967                         print "<td>";
3968                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3969                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3970                                        -class => "list"}, esc_path($diff->{'file'}));
3971                         print "</td>\n";
3972                         print "<td>$mode_chng</td>\n";
3973                         print "<td class=\"link\">";
3974                         if ($action eq 'commitdiff') {
3975                                 # link to patch
3976                                 $patchno++;
3977                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3978                                 print " | ";
3979                         }
3980                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3981                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3982                                       "blob") . " | ";
3983                         if ($have_blame) {
3984                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3985                                                              file_name=>$diff->{'file'})},
3986                                               "blame") . " | ";
3987                         }
3988                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3989                                                      file_name=>$diff->{'file'})},
3990                                       "history");
3991                         print "</td>\n";
3992
3993                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3994                         my $mode_chnge = "";
3995                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3996                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3997                                 if ($from_file_type ne $to_file_type) {
3998                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3999                                 }
4000                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4001                                         if ($from_mode_str && $to_mode_str) {
4002                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4003                                         } elsif ($to_mode_str) {
4004                                                 $mode_chnge .= " mode: $to_mode_str";
4005                                         }
4006                                 }
4007                                 $mode_chnge .= "]</span>\n";
4008                         }
4009                         print "<td>";
4010                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4011                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4012                                       -class => "list"}, esc_path($diff->{'file'}));
4013                         print "</td>\n";
4014                         print "<td>$mode_chnge</td>\n";
4015                         print "<td class=\"link\">";
4016                         if ($action eq 'commitdiff') {
4017                                 # link to patch
4018                                 $patchno++;
4019                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4020                                       " | ";
4021                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4022                                 # "commit" view and modified file (not onlu mode changed)
4023                                 print $cgi->a({-href => href(action=>"blobdiff",
4024                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4025                                                              hash_base=>$hash, hash_parent_base=>$parent,
4026                                                              file_name=>$diff->{'file'})},
4027                                               "diff") .
4028                                       " | ";
4029                         }
4030                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4031                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4032                                        "blob") . " | ";
4033                         if ($have_blame) {
4034                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4035                                                              file_name=>$diff->{'file'})},
4036                                               "blame") . " | ";
4037                         }
4038                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4039                                                      file_name=>$diff->{'file'})},
4040                                       "history");
4041                         print "</td>\n";
4042
4043                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4044                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4045                         my $nstatus = $status_name{$diff->{'status'}};
4046                         my $mode_chng = "";
4047                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4048                                 # mode also for directories, so we cannot use $to_mode_str
4049                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4050                         }
4051                         print "<td>" .
4052                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4053                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4054                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4055                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4056                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4057                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4058                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4059                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4060                               "<td class=\"link\">";
4061                         if ($action eq 'commitdiff') {
4062                                 # link to patch
4063                                 $patchno++;
4064                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4065                                       " | ";
4066                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4067                                 # "commit" view and modified file (not only pure rename or copy)
4068                                 print $cgi->a({-href => href(action=>"blobdiff",
4069                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4070                                                              hash_base=>$hash, hash_parent_base=>$parent,
4071                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4072                                               "diff") .
4073                                       " | ";
4074                         }
4075                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4076                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4077                                       "blob") . " | ";
4078                         if ($have_blame) {
4079                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4080                                                              file_name=>$diff->{'to_file'})},
4081                                               "blame") . " | ";
4082                         }
4083                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4084                                                     file_name=>$diff->{'to_file'})},
4085                                       "history");
4086                         print "</td>\n";
4087
4088                 } # we should not encounter Unmerged (U) or Unknown (X) status
4089                 print "</tr>\n";
4090         }
4091         print "</tbody>" if $has_header;
4092         print "</table>\n";
4093 }
4094
4095 sub git_patchset_body {
4096         my ($fd, $difftree, $hash, @hash_parents) = @_;
4097         my ($hash_parent) = $hash_parents[0];
4098
4099         my $is_combined = (@hash_parents > 1);
4100         my $patch_idx = 0;
4101         my $patch_number = 0;
4102         my $patch_line;
4103         my $diffinfo;
4104         my $to_name;
4105         my (%from, %to);
4106
4107         print "<div class=\"patchset\">\n";
4108
4109         # skip to first patch
4110         while ($patch_line = <$fd>) {
4111                 chomp $patch_line;
4112
4113                 last if ($patch_line =~ m/^diff /);
4114         }
4115
4116  PATCH:
4117         while ($patch_line) {
4118
4119                 # parse "git diff" header line
4120                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4121                         # $1 is from_name, which we do not use
4122                         $to_name = unquote($2);
4123                         $to_name =~ s!^b/!!;
4124                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4125                         # $1 is 'cc' or 'combined', which we do not use
4126                         $to_name = unquote($2);
4127                 } else {
4128                         $to_name = undef;
4129                 }
4130
4131                 # check if current patch belong to current raw line
4132                 # and parse raw git-diff line if needed
4133                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4134                         # this is continuation of a split patch
4135                         print "<div class=\"patch cont\">\n";
4136                 } else {
4137                         # advance raw git-diff output if needed
4138                         $patch_idx++ if defined $diffinfo;
4139
4140                         # read and prepare patch information
4141                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4142
4143                         # compact combined diff output can have some patches skipped
4144                         # find which patch (using pathname of result) we are at now;
4145                         if ($is_combined) {
4146                                 while ($to_name ne $diffinfo->{'to_file'}) {
4147                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4148                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4149                                               "</div>\n";  # class="patch"
4150
4151                                         $patch_idx++;
4152                                         $patch_number++;
4153
4154                                         last if $patch_idx > $#$difftree;
4155                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4156                                 }
4157                         }
4158
4159                         # modifies %from, %to hashes
4160                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4161
4162                         # this is first patch for raw difftree line with $patch_idx index
4163                         # we index @$difftree array from 0, but number patches from 1
4164                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4165                 }
4166
4167                 # git diff header
4168                 #assert($patch_line =~ m/^diff /) if DEBUG;
4169                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4170                 $patch_number++;
4171                 # print "git diff" header
4172                 print format_git_diff_header_line($patch_line, $diffinfo,
4173                                                   \%from, \%to);
4174
4175                 # print extended diff header
4176                 print "<div class=\"diff extended_header\">\n";
4177         EXTENDED_HEADER:
4178                 while ($patch_line = <$fd>) {
4179                         chomp $patch_line;
4180
4181                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4182
4183                         print format_extended_diff_header_line($patch_line, $diffinfo,
4184                                                                \%from, \%to);
4185                 }
4186                 print "</div>\n"; # class="diff extended_header"
4187
4188                 # from-file/to-file diff header
4189                 if (! $patch_line) {
4190                         print "</div>\n"; # class="patch"
4191                         last PATCH;
4192                 }
4193                 next PATCH if ($patch_line =~ m/^diff /);
4194                 #assert($patch_line =~ m/^---/) if DEBUG;
4195
4196                 my $last_patch_line = $patch_line;
4197                 $patch_line = <$fd>;
4198                 chomp $patch_line;
4199                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4200
4201                 print format_diff_from_to_header($last_patch_line, $patch_line,
4202                                                  $diffinfo, \%from, \%to,
4203                                                  @hash_parents);
4204
4205                 # the patch itself
4206         LINE:
4207                 while ($patch_line = <$fd>) {
4208                         chomp $patch_line;
4209
4210                         next PATCH if ($patch_line =~ m/^diff /);
4211
4212                         print format_diff_line($patch_line, \%from, \%to);
4213                 }
4214
4215         } continue {
4216                 print "</div>\n"; # class="patch"
4217         }
4218
4219         # for compact combined (--cc) format, with chunk and patch simpliciaction
4220         # patchset might be empty, but there might be unprocessed raw lines
4221         for (++$patch_idx if $patch_number > 0;
4222              $patch_idx < @$difftree;
4223              ++$patch_idx) {
4224                 # read and prepare patch information
4225                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4226
4227                 # generate anchor for "patch" links in difftree / whatchanged part
4228                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4229                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4230                       "</div>\n";  # class="patch"
4231
4232                 $patch_number++;
4233         }
4234
4235         if ($patch_number == 0) {
4236                 if (@hash_parents > 1) {
4237                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4238                 } else {
4239                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4240                 }
4241         }
4242
4243         print "</div>\n"; # class="patchset"
4244 }
4245
4246 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4247
4248 # fills project list info (age, description, owner, forks) for each
4249 # project in the list, removing invalid projects from returned list
4250 # NOTE: modifies $projlist, but does not remove entries from it
4251 sub fill_project_list_info {
4252         my ($projlist, $check_forks) = @_;
4253         my @projects;
4254
4255         my $show_ctags = gitweb_check_feature('ctags');
4256  PROJECT:
4257         foreach my $pr (@$projlist) {
4258                 my (@activity) = git_get_last_activity($pr->{'path'});
4259                 unless (@activity) {
4260                         next PROJECT;
4261                 }
4262                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4263                 if (!defined $pr->{'descr'}) {
4264                         my $descr = git_get_project_description($pr->{'path'}) || "";
4265                         $descr = to_utf8($descr);
4266                         $pr->{'descr_long'} = $descr;
4267                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4268                 }
4269                 if (!defined $pr->{'owner'}) {
4270                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4271                 }
4272                 if ($check_forks) {
4273                         my $pname = $pr->{'path'};
4274                         if (($pname =~ s/\.git$//) &&
4275                             ($pname !~ /\/$/) &&
4276                             (-d "$projectroot/$pname")) {
4277                                 $pr->{'forks'} = "-d $projectroot/$pname";
4278                         } else {
4279                                 $pr->{'forks'} = 0;
4280                         }
4281                 }
4282                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4283                 push @projects, $pr;
4284         }
4285
4286         return @projects;
4287 }
4288
4289 # print 'sort by' <th> element, generating 'sort by $name' replay link
4290 # if that order is not selected
4291 sub print_sort_th {
4292         my ($name, $order, $header) = @_;
4293         $header ||= ucfirst($name);
4294
4295         if ($order eq $name) {
4296                 print "<th>$header</th>\n";
4297         } else {
4298                 print "<th>" .
4299                       $cgi->a({-href => href(-replay=>1, order=>$name),
4300                                -class => "header"}, $header) .
4301                       "</th>\n";
4302         }
4303 }
4304
4305 sub git_project_list_body {
4306         # actually uses global variable $project
4307         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4308
4309         my $check_forks = gitweb_check_feature('forks');
4310         my @projects = fill_project_list_info($projlist, $check_forks);
4311
4312         $order ||= $default_projects_order;
4313         $from = 0 unless defined $from;
4314         $to = $#projects if (!defined $to || $#projects < $to);
4315
4316         my %order_info = (
4317                 project => { key => 'path', type => 'str' },
4318                 descr => { key => 'descr_long', type => 'str' },
4319                 owner => { key => 'owner', type => 'str' },
4320                 age => { key => 'age', type => 'num' }
4321         );
4322         my $oi = $order_info{$order};
4323         if ($oi->{'type'} eq 'str') {
4324                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4325         } else {
4326                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4327         }
4328
4329         my $show_ctags = gitweb_check_feature('ctags');
4330         if ($show_ctags) {
4331                 my %ctags;
4332                 foreach my $p (@projects) {
4333                         foreach my $ct (keys %{$p->{'ctags'}}) {
4334                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4335                         }
4336                 }
4337                 my $cloud = git_populate_project_tagcloud(\%ctags);
4338                 print git_show_project_tagcloud($cloud, 64);
4339         }
4340
4341         print "<table class=\"project_list\">\n";
4342         unless ($no_header) {
4343                 print "<tr>\n";
4344                 if ($check_forks) {
4345                         print "<th></th>\n";
4346                 }
4347                 print_sort_th('project', $order, 'Project');
4348                 print_sort_th('descr', $order, 'Description');
4349                 print_sort_th('owner', $order, 'Owner');
4350                 print_sort_th('age', $order, 'Last Change');
4351                 print "<th></th>\n" . # for links
4352                       "</tr>\n";
4353         }
4354         my $alternate = 1;
4355         my $tagfilter = $cgi->param('by_tag');
4356         for (my $i = $from; $i <= $to; $i++) {
4357                 my $pr = $projects[$i];
4358
4359                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4360                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4361                         and not $pr->{'descr_long'} =~ /$searchtext/;
4362                 # Weed out forks or non-matching entries of search
4363                 if ($check_forks) {
4364                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4365                         $forkbase="^$forkbase" if $forkbase;
4366                         next if not $searchtext and not $tagfilter and $show_ctags
4367                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4368                 }
4369
4370                 if ($alternate) {
4371                         print "<tr class=\"dark\">\n";
4372                 } else {
4373                         print "<tr class=\"light\">\n";
4374                 }
4375                 $alternate ^= 1;
4376                 if ($check_forks) {
4377                         print "<td>";
4378                         if ($pr->{'forks'}) {
4379                                 print "<!-- $pr->{'forks'} -->\n";
4380                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4381                         }
4382                         print "</td>\n";
4383                 }
4384                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4385                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4386                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4387                                         -class => "list", -title => $pr->{'descr_long'}},
4388                                         esc_html($pr->{'descr'})) . "</td>\n" .
4389                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4390                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4391                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4392                       "<td class=\"link\">" .
4393                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4394                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4395                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4396                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4397                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4398                       "</td>\n" .
4399                       "</tr>\n";
4400         }
4401         if (defined $extra) {
4402                 print "<tr>\n";
4403                 if ($check_forks) {
4404                         print "<td></td>\n";
4405                 }
4406                 print "<td colspan=\"5\">$extra</td>\n" .
4407                       "</tr>\n";
4408         }
4409         print "</table>\n";
4410 }
4411
4412 sub git_shortlog_body {
4413         # uses global variable $project
4414         my ($commitlist, $from, $to, $refs, $extra) = @_;
4415
4416         $from = 0 unless defined $from;
4417         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4418
4419         print "<table class=\"shortlog\">\n";
4420         my $alternate = 1;
4421         for (my $i = $from; $i <= $to; $i++) {
4422                 my %co = %{$commitlist->[$i]};
4423                 my $commit = $co{'id'};
4424                 my $ref = format_ref_marker($refs, $commit);
4425                 if ($alternate) {
4426                         print "<tr class=\"dark\">\n";
4427                 } else {
4428                         print "<tr class=\"light\">\n";
4429                 }
4430                 $alternate ^= 1;
4431                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4432                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4433                       format_author_html('td', \%co, 10) . "<td>";
4434                 print format_subject_html($co{'title'}, $co{'title_short'},
4435                                           href(action=>"commit", hash=>$commit), $ref);
4436                 print "</td>\n" .
4437                       "<td class=\"link\">" .
4438                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4439                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4440                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4441                 my $snapshot_links = format_snapshot_links($commit);
4442                 if (defined $snapshot_links) {
4443                         print " | " . $snapshot_links;
4444                 }
4445                 print "</td>\n" .
4446                       "</tr>\n";
4447         }
4448         if (defined $extra) {
4449                 print "<tr>\n" .
4450                       "<td colspan=\"4\">$extra</td>\n" .
4451                       "</tr>\n";
4452         }
4453         print "</table>\n";
4454 }
4455
4456 sub git_history_body {
4457         # Warning: assumes constant type (blob or tree) during history
4458         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4459
4460         $from = 0 unless defined $from;
4461         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4462
4463         print "<table class=\"history\">\n";
4464         my $alternate = 1;
4465         for (my $i = $from; $i <= $to; $i++) {
4466                 my %co = %{$commitlist->[$i]};
4467                 if (!%co) {
4468                         next;
4469                 }
4470                 my $commit = $co{'id'};
4471
4472                 my $ref = format_ref_marker($refs, $commit);
4473
4474                 if ($alternate) {
4475                         print "<tr class=\"dark\">\n";
4476                 } else {
4477                         print "<tr class=\"light\">\n";
4478                 }
4479                 $alternate ^= 1;
4480                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4481         # shortlog:   format_author_html('td', \%co, 10)
4482                       format_author_html('td', \%co, 15, 3) . "<td>";
4483                 # originally git_history used chop_str($co{'title'}, 50)
4484                 print format_subject_html($co{'title'}, $co{'title_short'},
4485                                           href(action=>"commit", hash=>$commit), $ref);
4486                 print "</td>\n" .
4487                       "<td class=\"link\">" .
4488                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4489                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4490
4491                 if ($ftype eq 'blob') {
4492                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4493                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4494                         if (defined $blob_current && defined $blob_parent &&
4495                                         $blob_current ne $blob_parent) {
4496                                 print " | " .
4497                                         $cgi->a({-href => href(action=>"blobdiff",
4498                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4499                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4500                                                                file_name=>$file_name)},
4501                                                 "diff to current");
4502                         }
4503                 }
4504                 print "</td>\n" .
4505                       "</tr>\n";
4506         }
4507         if (defined $extra) {
4508                 print "<tr>\n" .
4509                       "<td colspan=\"4\">$extra</td>\n" .
4510                       "</tr>\n";
4511         }
4512         print "</table>\n";
4513 }
4514
4515 sub git_tags_body {
4516         # uses global variable $project
4517         my ($taglist, $from, $to, $extra) = @_;
4518         $from = 0 unless defined $from;
4519         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4520
4521         print "<table class=\"tags\">\n";
4522         my $alternate = 1;
4523         for (my $i = $from; $i <= $to; $i++) {
4524                 my $entry = $taglist->[$i];
4525                 my %tag = %$entry;
4526                 my $comment = $tag{'subject'};
4527                 my $comment_short;
4528                 if (defined $comment) {
4529                         $comment_short = chop_str($comment, 30, 5);
4530                 }
4531                 if ($alternate) {
4532                         print "<tr class=\"dark\">\n";
4533                 } else {
4534                         print "<tr class=\"light\">\n";
4535                 }
4536                 $alternate ^= 1;
4537                 if (defined $tag{'age'}) {
4538                         print "<td><i>$tag{'age'}</i></td>\n";
4539                 } else {
4540                         print "<td></td>\n";
4541                 }
4542                 print "<td>" .
4543                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4544                                -class => "list name"}, esc_html($tag{'name'})) .
4545                       "</td>\n" .
4546                       "<td>";
4547                 if (defined $comment) {
4548                         print format_subject_html($comment, $comment_short,
4549                                                   href(action=>"tag", hash=>$tag{'id'}));
4550                 }
4551                 print "</td>\n" .
4552                       "<td class=\"selflink\">";
4553                 if ($tag{'type'} eq "tag") {
4554                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4555                 } else {
4556                         print "&nbsp;";
4557                 }
4558                 print "</td>\n" .
4559                       "<td class=\"link\">" . " | " .
4560                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4561                 if ($tag{'reftype'} eq "commit") {
4562                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4563                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4564                 } elsif ($tag{'reftype'} eq "blob") {
4565                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4566                 }
4567                 print "</td>\n" .
4568                       "</tr>";
4569         }
4570         if (defined $extra) {
4571                 print "<tr>\n" .
4572                       "<td colspan=\"5\">$extra</td>\n" .
4573                       "</tr>\n";
4574         }
4575         print "</table>\n";
4576 }
4577
4578 sub git_heads_body {
4579         # uses global variable $project
4580         my ($headlist, $head, $from, $to, $extra) = @_;
4581         $from = 0 unless defined $from;
4582         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4583
4584         print "<table class=\"heads\">\n";
4585         my $alternate = 1;
4586         for (my $i = $from; $i <= $to; $i++) {
4587                 my $entry = $headlist->[$i];
4588                 my %ref = %$entry;
4589                 my $curr = $ref{'id'} eq $head;
4590                 if ($alternate) {
4591                         print "<tr class=\"dark\">\n";
4592                 } else {
4593                         print "<tr class=\"light\">\n";
4594                 }
4595                 $alternate ^= 1;
4596                 print "<td><i>$ref{'age'}</i></td>\n" .
4597                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4598                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4599                                -class => "list name"},esc_html($ref{'name'})) .
4600                       "</td>\n" .
4601                       "<td class=\"link\">" .
4602                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4603                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4604                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4605                       "</td>\n" .
4606                       "</tr>";
4607         }
4608         if (defined $extra) {
4609                 print "<tr>\n" .
4610                       "<td colspan=\"3\">$extra</td>\n" .
4611                       "</tr>\n";
4612         }
4613         print "</table>\n";
4614 }
4615
4616 sub git_search_grep_body {
4617         my ($commitlist, $from, $to, $extra) = @_;
4618         $from = 0 unless defined $from;
4619         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4620
4621         print "<table class=\"commit_search\">\n";
4622         my $alternate = 1;
4623         for (my $i = $from; $i <= $to; $i++) {
4624                 my %co = %{$commitlist->[$i]};
4625                 if (!%co) {
4626                         next;
4627                 }
4628                 my $commit = $co{'id'};
4629                 if ($alternate) {
4630                         print "<tr class=\"dark\">\n";
4631                 } else {
4632                         print "<tr class=\"light\">\n";
4633                 }
4634                 $alternate ^= 1;
4635                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4636                       format_author_html('td', \%co, 15, 5) .
4637                       "<td>" .
4638                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4639                                -class => "list subject"},
4640                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4641                 my $comment = $co{'comment'};
4642                 foreach my $line (@$comment) {
4643                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4644                                 my ($lead, $match, $trail) = ($1, $2, $3);
4645                                 $match = chop_str($match, 70, 5, 'center');
4646                                 my $contextlen = int((80 - length($match))/2);
4647                                 $contextlen = 30 if ($contextlen > 30);
4648                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4649                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4650
4651                                 $lead  = esc_html($lead);
4652                                 $match = esc_html($match);
4653                                 $trail = esc_html($trail);
4654
4655                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4656                         }
4657                 }
4658                 print "</td>\n" .
4659                       "<td class=\"link\">" .
4660                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4661                       " | " .
4662                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4663                       " | " .
4664                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4665                 print "</td>\n" .
4666                       "</tr>\n";
4667         }
4668         if (defined $extra) {
4669                 print "<tr>\n" .
4670                       "<td colspan=\"3\">$extra</td>\n" .
4671                       "</tr>\n";
4672         }
4673         print "</table>\n";
4674 }
4675
4676 ## ======================================================================
4677 ## ======================================================================
4678 ## actions
4679
4680 sub git_project_list {
4681         my $order = $input_params{'order'};
4682         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4683                 die_error(400, "Unknown order parameter");
4684         }
4685
4686         my @list = git_get_projects_list();
4687         if (!@list) {
4688                 die_error(404, "No projects found");
4689         }
4690
4691         git_header_html();
4692         if (-f $home_text) {
4693                 print "<div class=\"index_include\">\n";
4694                 insert_file($home_text);
4695                 print "</div>\n";
4696         }
4697         print $cgi->startform(-method => "get") .
4698               "<p class=\"projsearch\">Search:\n" .
4699               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4700               "</p>" .
4701               $cgi->end_form() . "\n";
4702         git_project_list_body(\@list, $order);
4703         git_footer_html();
4704 }
4705
4706 sub git_forks {
4707         my $order = $input_params{'order'};
4708         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4709                 die_error(400, "Unknown order parameter");
4710         }
4711
4712         my @list = git_get_projects_list($project);
4713         if (!@list) {
4714                 die_error(404, "No forks found");
4715         }
4716
4717         git_header_html();
4718         git_print_page_nav('','');
4719         git_print_header_div('summary', "$project forks");
4720         git_project_list_body(\@list, $order);
4721         git_footer_html();
4722 }
4723
4724 sub git_project_index {
4725         my @projects = git_get_projects_list($project);
4726
4727         print $cgi->header(
4728                 -type => 'text/plain',
4729                 -charset => 'utf-8',
4730                 -content_disposition => 'inline; filename="index.aux"');
4731
4732         foreach my $pr (@projects) {
4733                 if (!exists $pr->{'owner'}) {
4734                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4735                 }
4736
4737                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4738                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4739                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4740                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4741                 $path  =~ s/ /\+/g;
4742                 $owner =~ s/ /\+/g;
4743
4744                 print "$path $owner\n";
4745         }
4746 }
4747
4748 sub git_summary {
4749         my $descr = git_get_project_description($project) || "none";
4750         my %co = parse_commit("HEAD");
4751         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4752         my $head = $co{'id'};
4753
4754         my $owner = git_get_project_owner($project);
4755
4756         my $refs = git_get_references();
4757         # These get_*_list functions return one more to allow us to see if
4758         # there are more ...
4759         my @taglist  = git_get_tags_list(16);
4760         my @headlist = git_get_heads_list(16);
4761         my @forklist;
4762         my $check_forks = gitweb_check_feature('forks');
4763
4764         if ($check_forks) {
4765                 @forklist = git_get_projects_list($project);
4766         }
4767
4768         git_header_html();
4769         git_print_page_nav('summary','', $head);
4770
4771         print "<div class=\"title\">&nbsp;</div>\n";
4772         print "<table class=\"projects_list\">\n" .
4773               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4774               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4775         if (defined $cd{'rfc2822'}) {
4776                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4777         }
4778
4779         # use per project git URL list in $projectroot/$project/cloneurl
4780         # or make project git URL from git base URL and project name
4781         my $url_tag = "URL";
4782         my @url_list = git_get_project_url_list($project);
4783         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4784         foreach my $git_url (@url_list) {
4785                 next unless $git_url;
4786                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4787                 $url_tag = "";
4788         }
4789
4790         # Tag cloud
4791         my $show_ctags = gitweb_check_feature('ctags');
4792         if ($show_ctags) {
4793                 my $ctags = git_get_project_ctags($project);
4794                 my $cloud = git_populate_project_tagcloud($ctags);
4795                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4796                 print "</td>\n<td>" unless %$ctags;
4797                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4798                 print "</td>\n<td>" if %$ctags;
4799                 print git_show_project_tagcloud($cloud, 48);
4800                 print "</td></tr>";
4801         }
4802
4803         print "</table>\n";
4804
4805         # If XSS prevention is on, we don't include README.html.
4806         # TODO: Allow a readme in some safe format.
4807         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4808                 print "<div class=\"title\">readme</div>\n" .
4809                       "<div class=\"readme\">\n";
4810                 insert_file("$projectroot/$project/README.html");
4811                 print "\n</div>\n"; # class="readme"
4812         }
4813
4814         # we need to request one more than 16 (0..15) to check if
4815         # those 16 are all
4816         my @commitlist = $head ? parse_commits($head, 17) : ();
4817         if (@commitlist) {
4818                 git_print_header_div('shortlog');
4819                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4820                                   $#commitlist <=  15 ? undef :
4821                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4822         }
4823
4824         if (@taglist) {
4825                 git_print_header_div('tags');
4826                 git_tags_body(\@taglist, 0, 15,
4827                               $#taglist <=  15 ? undef :
4828                               $cgi->a({-href => href(action=>"tags")}, "..."));
4829         }
4830
4831         if (@headlist) {
4832                 git_print_header_div('heads');
4833                 git_heads_body(\@headlist, $head, 0, 15,
4834                                $#headlist <= 15 ? undef :
4835                                $cgi->a({-href => href(action=>"heads")}, "..."));
4836         }
4837
4838         if (@forklist) {
4839                 git_print_header_div('forks');
4840                 git_project_list_body(\@forklist, 'age', 0, 15,
4841                                       $#forklist <= 15 ? undef :
4842                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4843                                       'no_header');
4844         }
4845
4846         git_footer_html();
4847 }
4848
4849 sub git_tag {
4850         my $head = git_get_head_hash($project);
4851         git_header_html();
4852         git_print_page_nav('','', $head,undef,$head);
4853         my %tag = parse_tag($hash);
4854
4855         if (! %tag) {
4856                 die_error(404, "Unknown tag object");
4857         }
4858
4859         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4860         print "<div class=\"title_text\">\n" .
4861               "<table class=\"object_header\">\n" .
4862               "<tr>\n" .
4863               "<td>object</td>\n" .
4864               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4865                                $tag{'object'}) . "</td>\n" .
4866               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4867                                               $tag{'type'}) . "</td>\n" .
4868               "</tr>\n";
4869         if (defined($tag{'author'})) {
4870                 git_print_authorship_rows(\%tag, 'author');
4871         }
4872         print "</table>\n\n" .
4873               "</div>\n";
4874         print "<div class=\"page_body\">";
4875         my $comment = $tag{'comment'};
4876         foreach my $line (@$comment) {
4877                 chomp $line;
4878                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4879         }
4880         print "</div>\n";
4881         git_footer_html();
4882 }
4883
4884 sub git_blame_common {
4885         my $format = shift || 'porcelain';
4886         if ($format eq 'porcelain' && $cgi->param('js')) {
4887                 $format = 'incremental';
4888                 $action = 'blame_incremental'; # for page title etc
4889         }
4890
4891         # permissions
4892         gitweb_check_feature('blame')
4893                 or die_error(403, "Blame view not allowed");
4894
4895         # error checking
4896         die_error(400, "No file name given") unless $file_name;
4897         $hash_base ||= git_get_head_hash($project);
4898         die_error(404, "Couldn't find base commit") unless $hash_base;
4899         my %co = parse_commit($hash_base)
4900                 or die_error(404, "Commit not found");
4901         my $ftype = "blob";
4902         if (!defined $hash) {
4903                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4904                         or die_error(404, "Error looking up file");
4905         } else {
4906                 $ftype = git_get_type($hash);
4907                 if ($ftype !~ "blob") {
4908                         die_error(400, "Object is not a blob");
4909                 }
4910         }
4911
4912         my $fd;
4913         if ($format eq 'incremental') {
4914                 # get file contents (as base)
4915                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
4916                         or die_error(500, "Open git-cat-file failed");
4917         } elsif ($format eq 'data') {
4918                 # run git-blame --incremental
4919                 open $fd, "-|", git_cmd(), "blame", "--incremental",
4920                         $hash_base, "--", $file_name
4921                         or die_error(500, "Open git-blame --incremental failed");
4922         } else {
4923                 # run git-blame --porcelain
4924                 open $fd, "-|", git_cmd(), "blame", '-p',
4925                         $hash_base, '--', $file_name
4926                         or die_error(500, "Open git-blame --porcelain failed");
4927         }
4928
4929         # incremental blame data returns early
4930         if ($format eq 'data') {
4931                 print $cgi->header(
4932                         -type=>"text/plain", -charset => "utf-8",
4933                         -status=> "200 OK");
4934                 local $| = 1; # output autoflush
4935                 print while <$fd>;
4936                 close $fd
4937                         or print "ERROR $!\n";
4938
4939                 print 'END';
4940                 if (defined $t0 && gitweb_check_feature('timed')) {
4941                         print ' '.
4942                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
4943                               ' '.$number_of_git_cmds;
4944                 }
4945                 print "\n";
4946
4947                 return;
4948         }
4949
4950         # page header
4951         git_header_html();
4952         my $formats_nav =
4953                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4954                         "blob") .
4955                 " | " .
4956                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4957                         "history") .
4958                 " | " .
4959                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
4960                         "HEAD");
4961         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4962         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4963         git_print_page_path($file_name, $ftype, $hash_base);
4964
4965         # page body
4966         if ($format eq 'incremental') {
4967                 print "<noscript>\n<div class=\"error\"><center><b>\n".
4968                       "This page requires JavaScript to run.\n Use ".
4969                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
4970                               'this page').
4971                       " instead.\n".
4972                       "</b></center></div>\n</noscript>\n";
4973
4974                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
4975         }
4976
4977         print qq!<div class="page_body">\n!;
4978         print qq!<div id="progress_info">... / ...</div>\n!
4979                 if ($format eq 'incremental');
4980         print qq!<table id="blame_table" class="blame" width="100%">\n!.
4981               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
4982               qq!<thead>\n!.
4983               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
4984               qq!</thead>\n!.
4985               qq!<tbody>\n!;
4986
4987         my @rev_color = qw(light dark);
4988         my $num_colors = scalar(@rev_color);
4989         my $current_color = 0;
4990
4991         if ($format eq 'incremental') {
4992                 my $color_class = $rev_color[$current_color];
4993
4994                 #contents of a file
4995                 my $linenr = 0;
4996         LINE:
4997                 while (my $line = <$fd>) {
4998                         chomp $line;
4999                         $linenr++;
5000
5001                         print qq!<tr id="l$linenr" class="$color_class">!.
5002                               qq!<td class="sha1"><a href=""> </a></td>!.
5003                               qq!<td class="linenr">!.
5004                               qq!<a class="linenr" href="">$linenr</a></td>!;
5005                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5006                         print qq!</tr>\n!;
5007                 }
5008
5009         } else { # porcelain, i.e. ordinary blame
5010                 my %metainfo = (); # saves information about commits
5011
5012                 # blame data
5013         LINE:
5014                 while (my $line = <$fd>) {
5015                         chomp $line;
5016                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5017                         # no <lines in group> for subsequent lines in group of lines
5018                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5019                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5020                         if (!exists $metainfo{$full_rev}) {
5021                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5022                         }
5023                         my $meta = $metainfo{$full_rev};
5024                         my $data;
5025                         while ($data = <$fd>) {
5026                                 chomp $data;
5027                                 last if ($data =~ s/^\t//); # contents of line
5028                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5029                                         $meta->{$1} = $2 unless exists $meta->{$1};
5030                                 }
5031                                 if ($data =~ /^previous /) {
5032                                         $meta->{'nprevious'}++;
5033                                 }
5034                         }
5035                         my $short_rev = substr($full_rev, 0, 8);
5036                         my $author = $meta->{'author'};
5037                         my %date =
5038                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5039                         my $date = $date{'iso-tz'};
5040                         if ($group_size) {
5041                                 $current_color = ($current_color + 1) % $num_colors;
5042                         }
5043                         my $tr_class = $rev_color[$current_color];
5044                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5045                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5046                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5047                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5048                         if ($group_size) {
5049                                 print "<td class=\"sha1\"";
5050                                 print " title=\"". esc_html($author) . ", $date\"";
5051                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5052                                 print ">";
5053                                 print $cgi->a({-href => href(action=>"commit",
5054                                                              hash=>$full_rev,
5055                                                              file_name=>$file_name)},
5056                                               esc_html($short_rev));
5057                                 if ($group_size >= 2) {
5058                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5059                                         if (@author_initials) {
5060                                                 print "<br />" .
5061                                                       esc_html(join('', @author_initials));
5062                                                 #           or join('.', ...)
5063                                         }
5064                                 }
5065                                 print "</td>\n";
5066                         }
5067                         # 'previous' <sha1 of parent commit> <filename at commit>
5068                         if (exists $meta->{'previous'} &&
5069                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5070                                 $meta->{'parent'} = $1;
5071                                 $meta->{'file_parent'} = unquote($2);
5072                         }
5073                         my $linenr_commit =
5074                                 exists($meta->{'parent'}) ?
5075                                 $meta->{'parent'} : $full_rev;
5076                         my $linenr_filename =
5077                                 exists($meta->{'file_parent'}) ?
5078                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5079                         my $blamed = href(action => 'blame',
5080                                           file_name => $linenr_filename,
5081                                           hash_base => $linenr_commit);
5082                         print "<td class=\"linenr\">";
5083                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5084                                         -class => "linenr" },
5085                                       esc_html($lineno));
5086                         print "</td>";
5087                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5088                         print "</tr>\n";
5089                 } # end while
5090
5091         }
5092
5093         # footer
5094         print "</tbody>\n".
5095               "</table>\n"; # class="blame"
5096         print "</div>\n";   # class="blame_body"
5097         close $fd
5098                 or print "Reading blob failed\n";
5099
5100         git_footer_html();
5101 }
5102
5103 sub git_blame {
5104         git_blame_common();
5105 }
5106
5107 sub git_blame_incremental {
5108         git_blame_common('incremental');
5109 }
5110
5111 sub git_blame_data {
5112         git_blame_common('data');
5113 }
5114
5115 sub git_tags {
5116         my $head = git_get_head_hash($project);
5117         git_header_html();
5118         git_print_page_nav('','', $head,undef,$head);
5119         git_print_header_div('summary', $project);
5120
5121         my @tagslist = git_get_tags_list();
5122         if (@tagslist) {
5123                 git_tags_body(\@tagslist);
5124         }
5125         git_footer_html();
5126 }
5127
5128 sub git_heads {
5129         my $head = git_get_head_hash($project);
5130         git_header_html();
5131         git_print_page_nav('','', $head,undef,$head);
5132         git_print_header_div('summary', $project);
5133
5134         my @headslist = git_get_heads_list();
5135         if (@headslist) {
5136                 git_heads_body(\@headslist, $head);
5137         }
5138         git_footer_html();
5139 }
5140
5141 sub git_blob_plain {
5142         my $type = shift;
5143         my $expires;
5144
5145         if (!defined $hash) {
5146                 if (defined $file_name) {
5147                         my $base = $hash_base || git_get_head_hash($project);
5148                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5149                                 or die_error(404, "Cannot find file");
5150                 } else {
5151                         die_error(400, "No file name defined");
5152                 }
5153         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5154                 # blobs defined by non-textual hash id's can be cached
5155                 $expires = "+1d";
5156         }
5157
5158         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5159                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5160
5161         # content-type (can include charset)
5162         $type = blob_contenttype($fd, $file_name, $type);
5163
5164         # "save as" filename, even when no $file_name is given
5165         my $save_as = "$hash";
5166         if (defined $file_name) {
5167                 $save_as = $file_name;
5168         } elsif ($type =~ m/^text\//) {
5169                 $save_as .= '.txt';
5170         }
5171
5172         # With XSS prevention on, blobs of all types except a few known safe
5173         # ones are served with "Content-Disposition: attachment" to make sure
5174         # they don't run in our security domain.  For certain image types,
5175         # blob view writes an <img> tag referring to blob_plain view, and we
5176         # want to be sure not to break that by serving the image as an
5177         # attachment (though Firefox 3 doesn't seem to care).
5178         my $sandbox = $prevent_xss &&
5179                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5180
5181         print $cgi->header(
5182                 -type => $type,
5183                 -expires => $expires,
5184                 -content_disposition =>
5185                         ($sandbox ? 'attachment' : 'inline')
5186                         . '; filename="' . $save_as . '"');
5187         local $/ = undef;
5188         binmode STDOUT, ':raw';
5189         print <$fd>;
5190         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5191         close $fd;
5192 }
5193
5194 sub git_blob {
5195         my $expires;
5196
5197         if (!defined $hash) {
5198                 if (defined $file_name) {
5199                         my $base = $hash_base || git_get_head_hash($project);
5200                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5201                                 or die_error(404, "Cannot find file");
5202                 } else {
5203                         die_error(400, "No file name defined");
5204                 }
5205         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5206                 # blobs defined by non-textual hash id's can be cached
5207                 $expires = "+1d";
5208         }
5209
5210         my $have_blame = gitweb_check_feature('blame');
5211         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5212                 or die_error(500, "Couldn't cat $file_name, $hash");
5213         my $mimetype = blob_mimetype($fd, $file_name);
5214         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5215                 close $fd;
5216                 return git_blob_plain($mimetype);
5217         }
5218         # we can have blame only for text/* mimetype
5219         $have_blame &&= ($mimetype =~ m!^text/!);
5220
5221         git_header_html(undef, $expires);
5222         my $formats_nav = '';
5223         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5224                 if (defined $file_name) {
5225                         if ($have_blame) {
5226                                 $formats_nav .=
5227                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5228                                                 "blame") .
5229                                         " | ";
5230                         }
5231                         $formats_nav .=
5232                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5233                                         "history") .
5234                                 " | " .
5235                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5236                                         "raw") .
5237                                 " | " .
5238                                 $cgi->a({-href => href(action=>"blob",
5239                                                        hash_base=>"HEAD", file_name=>$file_name)},
5240                                         "HEAD");
5241                 } else {
5242                         $formats_nav .=
5243                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5244                                         "raw");
5245                 }
5246                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5247                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5248         } else {
5249                 print "<div class=\"page_nav\">\n" .
5250                       "<br/><br/></div>\n" .
5251                       "<div class=\"title\">$hash</div>\n";
5252         }
5253         git_print_page_path($file_name, "blob", $hash_base);
5254         print "<div class=\"page_body\">\n";
5255         if ($mimetype =~ m!^image/!) {
5256                 print qq!<img type="$mimetype"!;
5257                 if ($file_name) {
5258                         print qq! alt="$file_name" title="$file_name"!;
5259                 }
5260                 print qq! src="! .
5261                       href(action=>"blob_plain", hash=>$hash,
5262                            hash_base=>$hash_base, file_name=>$file_name) .
5263                       qq!" />\n!;
5264         } else {
5265                 my $nr;
5266                 while (my $line = <$fd>) {
5267                         chomp $line;
5268                         $nr++;
5269                         $line = untabify($line);
5270                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5271                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5272                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5273                 }
5274         }
5275         close $fd
5276                 or print "Reading blob failed.\n";
5277         print "</div>";
5278         git_footer_html();
5279 }
5280
5281 sub git_tree {
5282         if (!defined $hash_base) {
5283                 $hash_base = "HEAD";
5284         }
5285         if (!defined $hash) {
5286                 if (defined $file_name) {
5287                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5288                 } else {
5289                         $hash = $hash_base;
5290                 }
5291         }
5292         die_error(404, "No such tree") unless defined($hash);
5293
5294         my $show_sizes = gitweb_check_feature('show-sizes');
5295         my $have_blame = gitweb_check_feature('blame');
5296
5297         my @entries = ();
5298         {
5299                 local $/ = "\0";
5300                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5301                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5302                         or die_error(500, "Open git-ls-tree failed");
5303                 @entries = map { chomp; $_ } <$fd>;
5304                 close $fd
5305                         or die_error(404, "Reading tree failed");
5306         }
5307
5308         my $refs = git_get_references();
5309         my $ref = format_ref_marker($refs, $hash_base);
5310         git_header_html();
5311         my $basedir = '';
5312         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5313                 my @views_nav = ();
5314                 if (defined $file_name) {
5315                         push @views_nav,
5316                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5317                                         "history"),
5318                                 $cgi->a({-href => href(action=>"tree",
5319                                                        hash_base=>"HEAD", file_name=>$file_name)},
5320                                         "HEAD"),
5321                 }
5322                 my $snapshot_links = format_snapshot_links($hash);
5323                 if (defined $snapshot_links) {
5324                         # FIXME: Should be available when we have no hash base as well.
5325                         push @views_nav, $snapshot_links;
5326                 }
5327                 git_print_page_nav('tree','', $hash_base, undef, undef,
5328                                    join(' | ', @views_nav));
5329                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5330         } else {
5331                 undef $hash_base;
5332                 print "<div class=\"page_nav\">\n";
5333                 print "<br/><br/></div>\n";
5334                 print "<div class=\"title\">$hash</div>\n";
5335         }
5336         if (defined $file_name) {
5337                 $basedir = $file_name;
5338                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5339                         $basedir .= '/';
5340                 }
5341                 git_print_page_path($file_name, 'tree', $hash_base);
5342         }
5343         print "<div class=\"page_body\">\n";
5344         print "<table class=\"tree\">\n";
5345         my $alternate = 1;
5346         # '..' (top directory) link if possible
5347         if (defined $hash_base &&
5348             defined $file_name && $file_name =~ m![^/]+$!) {
5349                 if ($alternate) {
5350                         print "<tr class=\"dark\">\n";
5351                 } else {
5352                         print "<tr class=\"light\">\n";
5353                 }
5354                 $alternate ^= 1;
5355
5356                 my $up = $file_name;
5357                 $up =~ s!/?[^/]+$!!;
5358                 undef $up unless $up;
5359                 # based on git_print_tree_entry
5360                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5361                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5362                 print '<td class="list">';
5363                 print $cgi->a({-href => href(action=>"tree",
5364                                              hash_base=>$hash_base,
5365                                              file_name=>$up)},
5366                               "..");
5367                 print "</td>\n";
5368                 print "<td class=\"link\"></td>\n";
5369
5370                 print "</tr>\n";
5371         }
5372         foreach my $line (@entries) {
5373                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5374
5375                 if ($alternate) {
5376                         print "<tr class=\"dark\">\n";
5377                 } else {
5378                         print "<tr class=\"light\">\n";
5379                 }
5380                 $alternate ^= 1;
5381
5382                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5383
5384                 print "</tr>\n";
5385         }
5386         print "</table>\n" .
5387               "</div>";
5388         git_footer_html();
5389 }
5390
5391 sub git_snapshot {
5392         my $format = $input_params{'snapshot_format'};
5393         if (!@snapshot_fmts) {
5394                 die_error(403, "Snapshots not allowed");
5395         }
5396         # default to first supported snapshot format
5397         $format ||= $snapshot_fmts[0];
5398         if ($format !~ m/^[a-z0-9]+$/) {
5399                 die_error(400, "Invalid snapshot format parameter");
5400         } elsif (!exists($known_snapshot_formats{$format})) {
5401                 die_error(400, "Unknown snapshot format");
5402         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5403                 die_error(403, "Snapshot format not allowed");
5404         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5405                 die_error(403, "Unsupported snapshot format");
5406         }
5407
5408         my $type = git_get_type("$hash^{}");
5409         if (!$type) {
5410                 die_error(404, 'Object does not exist');
5411         }  elsif ($type eq 'blob') {
5412                 die_error(400, 'Object is not a tree-ish');
5413         }
5414
5415         my $name = $project;
5416         $name =~ s,([^/])/*\.git$,$1,;
5417         $name = basename($name);
5418         my $filename = to_utf8($name);
5419         $name =~ s/\047/\047\\\047\047/g;
5420         my $cmd;
5421         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5422         $cmd = quote_command(
5423                 git_cmd(), 'archive',
5424                 "--format=$known_snapshot_formats{$format}{'format'}",
5425                 "--prefix=$name/", $hash);
5426         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5427                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5428         }
5429
5430         print $cgi->header(
5431                 -type => $known_snapshot_formats{$format}{'type'},
5432                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5433                 -status => '200 OK');
5434
5435         open my $fd, "-|", $cmd
5436                 or die_error(500, "Execute git-archive failed");
5437         binmode STDOUT, ':raw';
5438         print <$fd>;
5439         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5440         close $fd;
5441 }
5442
5443 sub git_log {
5444         my $head = git_get_head_hash($project);
5445         if (!defined $hash) {
5446                 $hash = $head;
5447         }
5448         if (!defined $page) {
5449                 $page = 0;
5450         }
5451         my $refs = git_get_references();
5452
5453         my @commitlist = parse_commits($hash, 101, (100 * $page));
5454
5455         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5456
5457         my ($patch_max) = gitweb_get_feature('patches');
5458         if ($patch_max) {
5459                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5460                         $paging_nav .= " &sdot; " .
5461                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5462                                         "patches");
5463                 }
5464         }
5465
5466         git_header_html();
5467         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5468
5469         if (!@commitlist) {
5470                 my %co = parse_commit($hash);
5471
5472                 git_print_header_div('summary', $project);
5473                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5474         }
5475         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5476         for (my $i = 0; $i <= $to; $i++) {
5477                 my %co = %{$commitlist[$i]};
5478                 next if !%co;
5479                 my $commit = $co{'id'};
5480                 my $ref = format_ref_marker($refs, $commit);
5481                 my %ad = parse_date($co{'author_epoch'});
5482                 git_print_header_div('commit',
5483                                "<span class=\"age\">$co{'age_string'}</span>" .
5484                                esc_html($co{'title'}) . $ref,
5485                                $commit);
5486                 print "<div class=\"title_text\">\n" .
5487                       "<div class=\"log_link\">\n" .
5488                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5489                       " | " .
5490                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5491                       " | " .
5492                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5493                       "<br/>\n" .
5494                       "</div>\n";
5495                       git_print_authorship(\%co, -tag => 'span');
5496                       print "<br/>\n</div>\n";
5497
5498                 print "<div class=\"log_body\">\n";
5499                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5500                 print "</div>\n";
5501         }
5502         if ($#commitlist >= 100) {
5503                 print "<div class=\"page_nav\">\n";
5504                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5505                                -accesskey => "n", -title => "Alt-n"}, "next");
5506                 print "</div>\n";
5507         }
5508         git_footer_html();
5509 }
5510
5511 sub git_commit {
5512         $hash ||= $hash_base || "HEAD";
5513         my %co = parse_commit($hash)
5514             or die_error(404, "Unknown commit object");
5515
5516         my $parent  = $co{'parent'};
5517         my $parents = $co{'parents'}; # listref
5518
5519         # we need to prepare $formats_nav before any parameter munging
5520         my $formats_nav;
5521         if (!defined $parent) {
5522                 # --root commitdiff
5523                 $formats_nav .= '(initial)';
5524         } elsif (@$parents == 1) {
5525                 # single parent commit
5526                 $formats_nav .=
5527                         '(parent: ' .
5528                         $cgi->a({-href => href(action=>"commit",
5529                                                hash=>$parent)},
5530                                 esc_html(substr($parent, 0, 7))) .
5531                         ')';
5532         } else {
5533                 # merge commit
5534                 $formats_nav .=
5535                         '(merge: ' .
5536                         join(' ', map {
5537                                 $cgi->a({-href => href(action=>"commit",
5538                                                        hash=>$_)},
5539                                         esc_html(substr($_, 0, 7)));
5540                         } @$parents ) .
5541                         ')';
5542         }
5543         if (gitweb_check_feature('patches') && @$parents <= 1) {
5544                 $formats_nav .= " | " .
5545                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5546                                 "patch");
5547         }
5548
5549         if (!defined $parent) {
5550                 $parent = "--root";
5551         }
5552         my @difftree;
5553         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5554                 @diff_opts,
5555                 (@$parents <= 1 ? $parent : '-c'),
5556                 $hash, "--"
5557                 or die_error(500, "Open git-diff-tree failed");
5558         @difftree = map { chomp; $_ } <$fd>;
5559         close $fd or die_error(404, "Reading git-diff-tree failed");
5560
5561         # non-textual hash id's can be cached
5562         my $expires;
5563         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5564                 $expires = "+1d";
5565         }
5566         my $refs = git_get_references();
5567         my $ref = format_ref_marker($refs, $co{'id'});
5568
5569         git_header_html(undef, $expires);
5570         git_print_page_nav('commit', '',
5571                            $hash, $co{'tree'}, $hash,
5572                            $formats_nav);
5573
5574         if (defined $co{'parent'}) {
5575                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5576         } else {
5577                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5578         }
5579         print "<div class=\"title_text\">\n" .
5580               "<table class=\"object_header\">\n";
5581         git_print_authorship_rows(\%co);
5582         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5583         print "<tr>" .
5584               "<td>tree</td>" .
5585               "<td class=\"sha1\">" .
5586               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5587                        class => "list"}, $co{'tree'}) .
5588               "</td>" .
5589               "<td class=\"link\">" .
5590               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5591                       "tree");
5592         my $snapshot_links = format_snapshot_links($hash);
5593         if (defined $snapshot_links) {
5594                 print " | " . $snapshot_links;
5595         }
5596         print "</td>" .
5597               "</tr>\n";
5598
5599         foreach my $par (@$parents) {
5600                 print "<tr>" .
5601                       "<td>parent</td>" .
5602                       "<td class=\"sha1\">" .
5603                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5604                                class => "list"}, $par) .
5605                       "</td>" .
5606                       "<td class=\"link\">" .
5607                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5608                       " | " .
5609                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5610                       "</td>" .
5611                       "</tr>\n";
5612         }
5613         print "</table>".
5614               "</div>\n";
5615
5616         print "<div class=\"page_body\">\n";
5617         git_print_log($co{'comment'});
5618         print "</div>\n";
5619
5620         git_difftree_body(\@difftree, $hash, @$parents);
5621
5622         git_footer_html();
5623 }
5624
5625 sub git_object {
5626         # object is defined by:
5627         # - hash or hash_base alone
5628         # - hash_base and file_name
5629         my $type;
5630
5631         # - hash or hash_base alone
5632         if ($hash || ($hash_base && !defined $file_name)) {
5633                 my $object_id = $hash || $hash_base;
5634
5635                 open my $fd, "-|", quote_command(
5636                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5637                         or die_error(404, "Object does not exist");
5638                 $type = <$fd>;
5639                 chomp $type;
5640                 close $fd
5641                         or die_error(404, "Object does not exist");
5642
5643         # - hash_base and file_name
5644         } elsif ($hash_base && defined $file_name) {
5645                 $file_name =~ s,/+$,,;
5646
5647                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5648                         or die_error(404, "Base object does not exist");
5649
5650                 # here errors should not hapen
5651                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5652                         or die_error(500, "Open git-ls-tree failed");
5653                 my $line = <$fd>;
5654                 close $fd;
5655
5656                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5657                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5658                         die_error(404, "File or directory for given base does not exist");
5659                 }
5660                 $type = $2;
5661                 $hash = $3;
5662         } else {
5663                 die_error(400, "Not enough information to find object");
5664         }
5665
5666         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5667                                           hash=>$hash, hash_base=>$hash_base,
5668                                           file_name=>$file_name),
5669                              -status => '302 Found');
5670 }
5671
5672 sub git_blobdiff {
5673         my $format = shift || 'html';
5674
5675         my $fd;
5676         my @difftree;
5677         my %diffinfo;
5678         my $expires;
5679
5680         # preparing $fd and %diffinfo for git_patchset_body
5681         # new style URI
5682         if (defined $hash_base && defined $hash_parent_base) {
5683                 if (defined $file_name) {
5684                         # read raw output
5685                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5686                                 $hash_parent_base, $hash_base,
5687                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5688                                 or die_error(500, "Open git-diff-tree failed");
5689                         @difftree = map { chomp; $_ } <$fd>;
5690                         close $fd
5691                                 or die_error(404, "Reading git-diff-tree failed");
5692                         @difftree
5693                                 or die_error(404, "Blob diff not found");
5694
5695                 } elsif (defined $hash &&
5696                          $hash =~ /[0-9a-fA-F]{40}/) {
5697                         # try to find filename from $hash
5698
5699                         # read filtered raw output
5700                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5701                                 $hash_parent_base, $hash_base, "--"
5702                                 or die_error(500, "Open git-diff-tree failed");
5703                         @difftree =
5704                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5705                                 # $hash == to_id
5706                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5707                                 map { chomp; $_ } <$fd>;
5708                         close $fd
5709                                 or die_error(404, "Reading git-diff-tree failed");
5710                         @difftree
5711                                 or die_error(404, "Blob diff not found");
5712
5713                 } else {
5714                         die_error(400, "Missing one of the blob diff parameters");
5715                 }
5716
5717                 if (@difftree > 1) {
5718                         die_error(400, "Ambiguous blob diff specification");
5719                 }
5720
5721                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5722                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5723                 $file_name   ||= $diffinfo{'to_file'};
5724
5725                 $hash_parent ||= $diffinfo{'from_id'};
5726                 $hash        ||= $diffinfo{'to_id'};
5727
5728                 # non-textual hash id's can be cached
5729                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5730                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5731                         $expires = '+1d';
5732                 }
5733
5734                 # open patch output
5735                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5736                         '-p', ($format eq 'html' ? "--full-index" : ()),
5737                         $hash_parent_base, $hash_base,
5738                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5739                         or die_error(500, "Open git-diff-tree failed");
5740         }
5741
5742         # old/legacy style URI -- not generated anymore since 1.4.3.
5743         if (!%diffinfo) {
5744                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5745         }
5746
5747         # header
5748         if ($format eq 'html') {
5749                 my $formats_nav =
5750                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5751                                 "raw");
5752                 git_header_html(undef, $expires);
5753                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5754                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5755                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5756                 } else {
5757                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5758                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5759                 }
5760                 if (defined $file_name) {
5761                         git_print_page_path($file_name, "blob", $hash_base);
5762                 } else {
5763                         print "<div class=\"page_path\"></div>\n";
5764                 }
5765
5766         } elsif ($format eq 'plain') {
5767                 print $cgi->header(
5768                         -type => 'text/plain',
5769                         -charset => 'utf-8',
5770                         -expires => $expires,
5771                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5772
5773                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5774
5775         } else {
5776                 die_error(400, "Unknown blobdiff format");
5777         }
5778
5779         # patch
5780         if ($format eq 'html') {
5781                 print "<div class=\"page_body\">\n";
5782
5783                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5784                 close $fd;
5785
5786                 print "</div>\n"; # class="page_body"
5787                 git_footer_html();
5788
5789         } else {
5790                 while (my $line = <$fd>) {
5791                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5792                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5793
5794                         print $line;
5795
5796                         last if $line =~ m!^\+\+\+!;
5797                 }
5798                 local $/ = undef;
5799                 print <$fd>;
5800                 close $fd;
5801         }
5802 }
5803
5804 sub git_blobdiff_plain {
5805         git_blobdiff('plain');
5806 }
5807
5808 sub git_commitdiff {
5809         my %params = @_;
5810         my $format = $params{-format} || 'html';
5811
5812         my ($patch_max) = gitweb_get_feature('patches');
5813         if ($format eq 'patch') {
5814                 die_error(403, "Patch view not allowed") unless $patch_max;
5815         }
5816
5817         $hash ||= $hash_base || "HEAD";
5818         my %co = parse_commit($hash)
5819             or die_error(404, "Unknown commit object");
5820
5821         # choose format for commitdiff for merge
5822         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5823                 $hash_parent = '--cc';
5824         }
5825         # we need to prepare $formats_nav before almost any parameter munging
5826         my $formats_nav;
5827         if ($format eq 'html') {
5828                 $formats_nav =
5829                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5830                                 "raw");
5831                 if ($patch_max && @{$co{'parents'}} <= 1) {
5832                         $formats_nav .= " | " .
5833                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5834                                         "patch");
5835                 }
5836
5837                 if (defined $hash_parent &&
5838                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5839                         # commitdiff with two commits given
5840                         my $hash_parent_short = $hash_parent;
5841                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5842                                 $hash_parent_short = substr($hash_parent, 0, 7);
5843                         }
5844                         $formats_nav .=
5845                                 ' (from';
5846                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5847                                 if ($co{'parents'}[$i] eq $hash_parent) {
5848                                         $formats_nav .= ' parent ' . ($i+1);
5849                                         last;
5850                                 }
5851                         }
5852                         $formats_nav .= ': ' .
5853                                 $cgi->a({-href => href(action=>"commitdiff",
5854                                                        hash=>$hash_parent)},
5855                                         esc_html($hash_parent_short)) .
5856                                 ')';
5857                 } elsif (!$co{'parent'}) {
5858                         # --root commitdiff
5859                         $formats_nav .= ' (initial)';
5860                 } elsif (scalar @{$co{'parents'}} == 1) {
5861                         # single parent commit
5862                         $formats_nav .=
5863                                 ' (parent: ' .
5864                                 $cgi->a({-href => href(action=>"commitdiff",
5865                                                        hash=>$co{'parent'})},
5866                                         esc_html(substr($co{'parent'}, 0, 7))) .
5867                                 ')';
5868                 } else {
5869                         # merge commit
5870                         if ($hash_parent eq '--cc') {
5871                                 $formats_nav .= ' | ' .
5872                                         $cgi->a({-href => href(action=>"commitdiff",
5873                                                                hash=>$hash, hash_parent=>'-c')},
5874                                                 'combined');
5875                         } else { # $hash_parent eq '-c'
5876                                 $formats_nav .= ' | ' .
5877                                         $cgi->a({-href => href(action=>"commitdiff",
5878                                                                hash=>$hash, hash_parent=>'--cc')},
5879                                                 'compact');
5880                         }
5881                         $formats_nav .=
5882                                 ' (merge: ' .
5883                                 join(' ', map {
5884                                         $cgi->a({-href => href(action=>"commitdiff",
5885                                                                hash=>$_)},
5886                                                 esc_html(substr($_, 0, 7)));
5887                                 } @{$co{'parents'}} ) .
5888                                 ')';
5889                 }
5890         }
5891
5892         my $hash_parent_param = $hash_parent;
5893         if (!defined $hash_parent_param) {
5894                 # --cc for multiple parents, --root for parentless
5895                 $hash_parent_param =
5896                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5897         }
5898
5899         # read commitdiff
5900         my $fd;
5901         my @difftree;
5902         if ($format eq 'html') {
5903                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5904                         "--no-commit-id", "--patch-with-raw", "--full-index",
5905                         $hash_parent_param, $hash, "--"
5906                         or die_error(500, "Open git-diff-tree failed");
5907
5908                 while (my $line = <$fd>) {
5909                         chomp $line;
5910                         # empty line ends raw part of diff-tree output
5911                         last unless $line;
5912                         push @difftree, scalar parse_difftree_raw_line($line);
5913                 }
5914
5915         } elsif ($format eq 'plain') {
5916                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5917                         '-p', $hash_parent_param, $hash, "--"
5918                         or die_error(500, "Open git-diff-tree failed");
5919         } elsif ($format eq 'patch') {
5920                 # For commit ranges, we limit the output to the number of
5921                 # patches specified in the 'patches' feature.
5922                 # For single commits, we limit the output to a single patch,
5923                 # diverging from the git-format-patch default.
5924                 my @commit_spec = ();
5925                 if ($hash_parent) {
5926                         if ($patch_max > 0) {
5927                                 push @commit_spec, "-$patch_max";
5928                         }
5929                         push @commit_spec, '-n', "$hash_parent..$hash";
5930                 } else {
5931                         if ($params{-single}) {
5932                                 push @commit_spec, '-1';
5933                         } else {
5934                                 if ($patch_max > 0) {
5935                                         push @commit_spec, "-$patch_max";
5936                                 }
5937                                 push @commit_spec, "-n";
5938                         }
5939                         push @commit_spec, '--root', $hash;
5940                 }
5941                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5942                         '--stdout', @commit_spec
5943                         or die_error(500, "Open git-format-patch failed");
5944         } else {
5945                 die_error(400, "Unknown commitdiff format");
5946         }
5947
5948         # non-textual hash id's can be cached
5949         my $expires;
5950         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5951                 $expires = "+1d";
5952         }
5953
5954         # write commit message
5955         if ($format eq 'html') {
5956                 my $refs = git_get_references();
5957                 my $ref = format_ref_marker($refs, $co{'id'});
5958
5959                 git_header_html(undef, $expires);
5960                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5961                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5962                 print "<div class=\"title_text\">\n" .
5963                       "<table class=\"object_header\">\n";
5964                 git_print_authorship_rows(\%co);
5965                 print "</table>".
5966                       "</div>\n";
5967                 print "<div class=\"page_body\">\n";
5968                 if (@{$co{'comment'}} > 1) {
5969                         print "<div class=\"log\">\n";
5970                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5971                         print "</div>\n"; # class="log"
5972                 }
5973
5974         } elsif ($format eq 'plain') {
5975                 my $refs = git_get_references("tags");
5976                 my $tagname = git_get_rev_name_tags($hash);
5977                 my $filename = basename($project) . "-$hash.patch";
5978
5979                 print $cgi->header(
5980                         -type => 'text/plain',
5981                         -charset => 'utf-8',
5982                         -expires => $expires,
5983                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5984                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5985                 print "From: " . to_utf8($co{'author'}) . "\n";
5986                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5987                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5988
5989                 print "X-Git-Tag: $tagname\n" if $tagname;
5990                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5991
5992                 foreach my $line (@{$co{'comment'}}) {
5993                         print to_utf8($line) . "\n";
5994                 }
5995                 print "---\n\n";
5996         } elsif ($format eq 'patch') {
5997                 my $filename = basename($project) . "-$hash.patch";
5998
5999                 print $cgi->header(
6000                         -type => 'text/plain',
6001                         -charset => 'utf-8',
6002                         -expires => $expires,
6003                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6004         }
6005
6006         # write patch
6007         if ($format eq 'html') {
6008                 my $use_parents = !defined $hash_parent ||
6009                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6010                 git_difftree_body(\@difftree, $hash,
6011                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6012                 print "<br/>\n";
6013
6014                 git_patchset_body($fd, \@difftree, $hash,
6015                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6016                 close $fd;
6017                 print "</div>\n"; # class="page_body"
6018                 git_footer_html();
6019
6020         } elsif ($format eq 'plain') {
6021                 local $/ = undef;
6022                 print <$fd>;
6023                 close $fd
6024                         or print "Reading git-diff-tree failed\n";
6025         } elsif ($format eq 'patch') {
6026                 local $/ = undef;
6027                 print <$fd>;
6028                 close $fd
6029                         or print "Reading git-format-patch failed\n";
6030         }
6031 }
6032
6033 sub git_commitdiff_plain {
6034         git_commitdiff(-format => 'plain');
6035 }
6036
6037 # format-patch-style patches
6038 sub git_patch {
6039         git_commitdiff(-format => 'patch', -single => 1);
6040 }
6041
6042 sub git_patches {
6043         git_commitdiff(-format => 'patch');
6044 }
6045
6046 sub git_history {
6047         if (!defined $hash_base) {
6048                 $hash_base = git_get_head_hash($project);
6049         }
6050         if (!defined $page) {
6051                 $page = 0;
6052         }
6053         my $ftype;
6054         my %co = parse_commit($hash_base)
6055             or die_error(404, "Unknown commit object");
6056
6057         my $refs = git_get_references();
6058         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
6059
6060         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
6061                                        $file_name, "--full-history")
6062             or die_error(404, "No such file or directory on given branch");
6063
6064         if (!defined $hash && defined $file_name) {
6065                 # some commits could have deleted file in question,
6066                 # and not have it in tree, but one of them has to have it
6067                 for (my $i = 0; $i <= @commitlist; $i++) {
6068                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6069                         last if defined $hash;
6070                 }
6071         }
6072         if (defined $hash) {
6073                 $ftype = git_get_type($hash);
6074         }
6075         if (!defined $ftype) {
6076                 die_error(500, "Unknown type of object");
6077         }
6078
6079         my $paging_nav = '';
6080         if ($page > 0) {
6081                 $paging_nav .=
6082                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
6083                                                file_name=>$file_name)},
6084                                 "first");
6085                 $paging_nav .= " &sdot; " .
6086                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6087                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6088         } else {
6089                 $paging_nav .= "first";
6090                 $paging_nav .= " &sdot; prev";
6091         }
6092         my $next_link = '';
6093         if ($#commitlist >= 100) {
6094                 $next_link =
6095                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6096                                  -accesskey => "n", -title => "Alt-n"}, "next");
6097                 $paging_nav .= " &sdot; $next_link";
6098         } else {
6099                 $paging_nav .= " &sdot; next";
6100         }
6101
6102         git_header_html();
6103         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6104         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6105         git_print_page_path($file_name, $ftype, $hash_base);
6106
6107         git_history_body(\@commitlist, 0, 99,
6108                          $refs, $hash_base, $ftype, $next_link);
6109
6110         git_footer_html();
6111 }
6112
6113 sub git_search {
6114         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6115         if (!defined $searchtext) {
6116                 die_error(400, "Text field is empty");
6117         }
6118         if (!defined $hash) {
6119                 $hash = git_get_head_hash($project);
6120         }
6121         my %co = parse_commit($hash);
6122         if (!%co) {
6123                 die_error(404, "Unknown commit object");
6124         }
6125         if (!defined $page) {
6126                 $page = 0;
6127         }
6128
6129         $searchtype ||= 'commit';
6130         if ($searchtype eq 'pickaxe') {
6131                 # pickaxe may take all resources of your box and run for several minutes
6132                 # with every query - so decide by yourself how public you make this feature
6133                 gitweb_check_feature('pickaxe')
6134                     or die_error(403, "Pickaxe is disabled");
6135         }
6136         if ($searchtype eq 'grep') {
6137                 gitweb_check_feature('grep')[0]
6138                     or die_error(403, "Grep is disabled");
6139         }
6140
6141         git_header_html();
6142
6143         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6144                 my $greptype;
6145                 if ($searchtype eq 'commit') {
6146                         $greptype = "--grep=";
6147                 } elsif ($searchtype eq 'author') {
6148                         $greptype = "--author=";
6149                 } elsif ($searchtype eq 'committer') {
6150                         $greptype = "--committer=";
6151                 }
6152                 $greptype .= $searchtext;
6153                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6154                                                $greptype, '--regexp-ignore-case',
6155                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6156
6157                 my $paging_nav = '';
6158                 if ($page > 0) {
6159                         $paging_nav .=
6160                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6161                                                        searchtext=>$searchtext,
6162                                                        searchtype=>$searchtype)},
6163                                         "first");
6164                         $paging_nav .= " &sdot; " .
6165                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6166                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6167                 } else {
6168                         $paging_nav .= "first";
6169                         $paging_nav .= " &sdot; prev";
6170                 }
6171                 my $next_link = '';
6172                 if ($#commitlist >= 100) {
6173                         $next_link =
6174                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6175                                          -accesskey => "n", -title => "Alt-n"}, "next");
6176                         $paging_nav .= " &sdot; $next_link";
6177                 } else {
6178                         $paging_nav .= " &sdot; next";
6179                 }
6180
6181                 if ($#commitlist >= 100) {
6182                 }
6183
6184                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6185                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6186                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6187         }
6188
6189         if ($searchtype eq 'pickaxe') {
6190                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6191                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6192
6193                 print "<table class=\"pickaxe search\">\n";
6194                 my $alternate = 1;
6195                 local $/ = "\n";
6196                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6197                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6198                         ($search_use_regexp ? '--pickaxe-regex' : ());
6199                 undef %co;
6200                 my @files;
6201                 while (my $line = <$fd>) {
6202                         chomp $line;
6203                         next unless $line;
6204
6205                         my %set = parse_difftree_raw_line($line);
6206                         if (defined $set{'commit'}) {
6207                                 # finish previous commit
6208                                 if (%co) {
6209                                         print "</td>\n" .
6210                                               "<td class=\"link\">" .
6211                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6212                                               " | " .
6213                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6214                                         print "</td>\n" .
6215                                               "</tr>\n";
6216                                 }
6217
6218                                 if ($alternate) {
6219                                         print "<tr class=\"dark\">\n";
6220                                 } else {
6221                                         print "<tr class=\"light\">\n";
6222                                 }
6223                                 $alternate ^= 1;
6224                                 %co = parse_commit($set{'commit'});
6225                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6226                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6227                                       "<td><i>$author</i></td>\n" .
6228                                       "<td>" .
6229                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6230                                               -class => "list subject"},
6231                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6232                         } elsif (defined $set{'to_id'}) {
6233                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6234
6235                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6236                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6237                                               -class => "list"},
6238                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6239                                       "<br/>\n";
6240                         }
6241                 }
6242                 close $fd;
6243
6244                 # finish last commit (warning: repetition!)
6245                 if (%co) {
6246                         print "</td>\n" .
6247                               "<td class=\"link\">" .
6248                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6249                               " | " .
6250                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6251                         print "</td>\n" .
6252                               "</tr>\n";
6253                 }
6254
6255                 print "</table>\n";
6256         }
6257
6258         if ($searchtype eq 'grep') {
6259                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6260                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6261
6262                 print "<table class=\"grep_search\">\n";
6263                 my $alternate = 1;
6264                 my $matches = 0;
6265                 local $/ = "\n";
6266                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6267                         $search_use_regexp ? ('-E', '-i') : '-F',
6268                         $searchtext, $co{'tree'};
6269                 my $lastfile = '';
6270                 while (my $line = <$fd>) {
6271                         chomp $line;
6272                         my ($file, $lno, $ltext, $binary);
6273                         last if ($matches++ > 1000);
6274                         if ($line =~ /^Binary file (.+) matches$/) {
6275                                 $file = $1;
6276                                 $binary = 1;
6277                         } else {
6278                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6279                         }
6280                         if ($file ne $lastfile) {
6281                                 $lastfile and print "</td></tr>\n";
6282                                 if ($alternate++) {
6283                                         print "<tr class=\"dark\">\n";
6284                                 } else {
6285                                         print "<tr class=\"light\">\n";
6286                                 }
6287                                 print "<td class=\"list\">".
6288                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6289                                                                file_name=>"$file"),
6290                                                 -class => "list"}, esc_path($file));
6291                                 print "</td><td>\n";
6292                                 $lastfile = $file;
6293                         }
6294                         if ($binary) {
6295                                 print "<div class=\"binary\">Binary file</div>\n";
6296                         } else {
6297                                 $ltext = untabify($ltext);
6298                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6299                                         $ltext = esc_html($1, -nbsp=>1);
6300                                         $ltext .= '<span class="match">';
6301                                         $ltext .= esc_html($2, -nbsp=>1);
6302                                         $ltext .= '</span>';
6303                                         $ltext .= esc_html($3, -nbsp=>1);
6304                                 } else {
6305                                         $ltext = esc_html($ltext, -nbsp=>1);
6306                                 }
6307                                 print "<div class=\"pre\">" .
6308                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6309                                                                file_name=>"$file").'#l'.$lno,
6310                                                 -class => "linenr"}, sprintf('%4i', $lno))
6311                                         . ' ' .  $ltext . "</div>\n";
6312                         }
6313                 }
6314                 if ($lastfile) {
6315                         print "</td></tr>\n";
6316                         if ($matches > 1000) {
6317                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6318                         }
6319                 } else {
6320                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6321                 }
6322                 close $fd;
6323
6324                 print "</table>\n";
6325         }
6326         git_footer_html();
6327 }
6328
6329 sub git_search_help {
6330         git_header_html();
6331         git_print_page_nav('','', $hash,$hash,$hash);
6332         print <<EOT;
6333 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6334 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6335 the pattern entered is recognized as the POSIX extended
6336 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6337 insensitive).</p>
6338 <dl>
6339 <dt><b>commit</b></dt>
6340 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6341 EOT
6342         my $have_grep = gitweb_check_feature('grep');
6343         if ($have_grep) {
6344                 print <<EOT;
6345 <dt><b>grep</b></dt>
6346 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6347     a different one) are searched for the given pattern. On large trees, this search can take
6348 a while and put some strain on the server, so please use it with some consideration. Note that
6349 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6350 case-sensitive.</dd>
6351 EOT
6352         }
6353         print <<EOT;
6354 <dt><b>author</b></dt>
6355 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6356 <dt><b>committer</b></dt>
6357 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6358 EOT
6359         my $have_pickaxe = gitweb_check_feature('pickaxe');
6360         if ($have_pickaxe) {
6361                 print <<EOT;
6362 <dt><b>pickaxe</b></dt>
6363 <dd>All commits that caused the string to appear or disappear from any file (changes that
6364 added, removed or "modified" the string) will be listed. This search can take a while and
6365 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6366 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6367 EOT
6368         }
6369         print "</dl>\n";
6370         git_footer_html();
6371 }
6372
6373 sub git_shortlog {
6374         my $head = git_get_head_hash($project);
6375         if (!defined $hash) {
6376                 $hash = $head;
6377         }
6378         if (!defined $page) {
6379                 $page = 0;
6380         }
6381         my $refs = git_get_references();
6382
6383         my $commit_hash = $hash;
6384         if (defined $hash_parent) {
6385                 $commit_hash = "$hash_parent..$hash";
6386         }
6387         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6388
6389         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6390         my $next_link = '';
6391         if ($#commitlist >= 100) {
6392                 $next_link =
6393                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6394                                  -accesskey => "n", -title => "Alt-n"}, "next");
6395         }
6396         my $patch_max = gitweb_check_feature('patches');
6397         if ($patch_max) {
6398                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6399                         $paging_nav .= " &sdot; " .
6400                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6401                                         "patches");
6402                 }
6403         }
6404
6405         git_header_html();
6406         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6407         git_print_header_div('summary', $project);
6408
6409         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6410
6411         git_footer_html();
6412 }
6413
6414 ## ......................................................................
6415 ## feeds (RSS, Atom; OPML)
6416
6417 sub git_feed {
6418         my $format = shift || 'atom';
6419         my $have_blame = gitweb_check_feature('blame');
6420
6421         # Atom: http://www.atomenabled.org/developers/syndication/
6422         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6423         if ($format ne 'rss' && $format ne 'atom') {
6424                 die_error(400, "Unknown web feed format");
6425         }
6426
6427         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6428         my $head = $hash || 'HEAD';
6429         my @commitlist = parse_commits($head, 150, 0, $file_name);
6430
6431         my %latest_commit;
6432         my %latest_date;
6433         my $content_type = "application/$format+xml";
6434         if (defined $cgi->http('HTTP_ACCEPT') &&
6435                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6436                 # browser (feed reader) prefers text/xml
6437                 $content_type = 'text/xml';
6438         }
6439         if (defined($commitlist[0])) {
6440                 %latest_commit = %{$commitlist[0]};
6441                 my $latest_epoch = $latest_commit{'committer_epoch'};
6442                 %latest_date   = parse_date($latest_epoch);
6443                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6444                 if (defined $if_modified) {
6445                         my $since;
6446                         if (eval { require HTTP::Date; 1; }) {
6447                                 $since = HTTP::Date::str2time($if_modified);
6448                         } elsif (eval { require Time::ParseDate; 1; }) {
6449                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6450                         }
6451                         if (defined $since && $latest_epoch <= $since) {
6452                                 print $cgi->header(
6453                                         -type => $content_type,
6454                                         -charset => 'utf-8',
6455                                         -last_modified => $latest_date{'rfc2822'},
6456                                         -status => '304 Not Modified');
6457                                 return;
6458                         }
6459                 }
6460                 print $cgi->header(
6461                         -type => $content_type,
6462                         -charset => 'utf-8',
6463                         -last_modified => $latest_date{'rfc2822'});
6464         } else {
6465                 print $cgi->header(
6466                         -type => $content_type,
6467                         -charset => 'utf-8');
6468         }
6469
6470         # Optimization: skip generating the body if client asks only
6471         # for Last-Modified date.
6472         return if ($cgi->request_method() eq 'HEAD');
6473
6474         # header variables
6475         my $title = "$site_name - $project/$action";
6476         my $feed_type = 'log';
6477         if (defined $hash) {
6478                 $title .= " - '$hash'";
6479                 $feed_type = 'branch log';
6480                 if (defined $file_name) {
6481                         $title .= " :: $file_name";
6482                         $feed_type = 'history';
6483                 }
6484         } elsif (defined $file_name) {
6485                 $title .= " - $file_name";
6486                 $feed_type = 'history';
6487         }
6488         $title .= " $feed_type";
6489         my $descr = git_get_project_description($project);
6490         if (defined $descr) {
6491                 $descr = esc_html($descr);
6492         } else {
6493                 $descr = "$project " .
6494                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6495                          " feed";
6496         }
6497         my $owner = git_get_project_owner($project);
6498         $owner = esc_html($owner);
6499
6500         #header
6501         my $alt_url;
6502         if (defined $file_name) {
6503                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6504         } elsif (defined $hash) {
6505                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6506         } else {
6507                 $alt_url = href(-full=>1, action=>"summary");
6508         }
6509         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6510         if ($format eq 'rss') {
6511                 print <<XML;
6512 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6513 <channel>
6514 XML
6515                 print "<title>$title</title>\n" .
6516                       "<link>$alt_url</link>\n" .
6517                       "<description>$descr</description>\n" .
6518                       "<language>en</language>\n" .
6519                       # project owner is responsible for 'editorial' content
6520                       "<managingEditor>$owner</managingEditor>\n";
6521                 if (defined $logo || defined $favicon) {
6522                         # prefer the logo to the favicon, since RSS
6523                         # doesn't allow both
6524                         my $img = esc_url($logo || $favicon);
6525                         print "<image>\n" .
6526                               "<url>$img</url>\n" .
6527                               "<title>$title</title>\n" .
6528                               "<link>$alt_url</link>\n" .
6529                               "</image>\n";
6530                 }
6531                 if (%latest_date) {
6532                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6533                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6534                 }
6535                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6536         } elsif ($format eq 'atom') {
6537                 print <<XML;
6538 <feed xmlns="http://www.w3.org/2005/Atom">
6539 XML
6540                 print "<title>$title</title>\n" .
6541                       "<subtitle>$descr</subtitle>\n" .
6542                       '<link rel="alternate" type="text/html" href="' .
6543                       $alt_url . '" />' . "\n" .
6544                       '<link rel="self" type="' . $content_type . '" href="' .
6545                       $cgi->self_url() . '" />' . "\n" .
6546                       "<id>" . href(-full=>1) . "</id>\n" .
6547                       # use project owner for feed author
6548                       "<author><name>$owner</name></author>\n";
6549                 if (defined $favicon) {
6550                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6551                 }
6552                 if (defined $logo_url) {
6553                         # not twice as wide as tall: 72 x 27 pixels
6554                         print "<logo>" . esc_url($logo) . "</logo>\n";
6555                 }
6556                 if (! %latest_date) {
6557                         # dummy date to keep the feed valid until commits trickle in:
6558                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6559                 } else {
6560                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6561                 }
6562                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6563         }
6564
6565         # contents
6566         for (my $i = 0; $i <= $#commitlist; $i++) {
6567                 my %co = %{$commitlist[$i]};
6568                 my $commit = $co{'id'};
6569                 # we read 150, we always show 30 and the ones more recent than 48 hours
6570                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6571                         last;
6572                 }
6573                 my %cd = parse_date($co{'author_epoch'});
6574
6575                 # get list of changed files
6576                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6577                         $co{'parent'} || "--root",
6578                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6579                         or next;
6580                 my @difftree = map { chomp; $_ } <$fd>;
6581                 close $fd
6582                         or next;
6583
6584                 # print element (entry, item)
6585                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6586                 if ($format eq 'rss') {
6587                         print "<item>\n" .
6588                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6589                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6590                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6591                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6592                               "<link>$co_url</link>\n" .
6593                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6594                               "<content:encoded>" .
6595                               "<![CDATA[\n";
6596                 } elsif ($format eq 'atom') {
6597                         print "<entry>\n" .
6598                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6599                               "<updated>$cd{'iso-8601'}</updated>\n" .
6600                               "<author>\n" .
6601                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6602                         if ($co{'author_email'}) {
6603                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6604                         }
6605                         print "</author>\n" .
6606                               # use committer for contributor
6607                               "<contributor>\n" .
6608                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6609                         if ($co{'committer_email'}) {
6610                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6611                         }
6612                         print "</contributor>\n" .
6613                               "<published>$cd{'iso-8601'}</published>\n" .
6614                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6615                               "<id>$co_url</id>\n" .
6616                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6617                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6618                 }
6619                 my $comment = $co{'comment'};
6620                 print "<pre>\n";
6621                 foreach my $line (@$comment) {
6622                         $line = esc_html($line);
6623                         print "$line\n";
6624                 }
6625                 print "</pre><ul>\n";
6626                 foreach my $difftree_line (@difftree) {
6627                         my %difftree = parse_difftree_raw_line($difftree_line);
6628                         next if !$difftree{'from_id'};
6629
6630                         my $file = $difftree{'file'} || $difftree{'to_file'};
6631
6632                         print "<li>" .
6633                               "[" .
6634                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6635                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6636                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6637                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6638                                       -title => "diff"}, 'D');
6639                         if ($have_blame) {
6640                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6641                                                              file_name=>$file, hash_base=>$commit),
6642                                               -title => "blame"}, 'B');
6643                         }
6644                         # if this is not a feed of a file history
6645                         if (!defined $file_name || $file_name ne $file) {
6646                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6647                                                              file_name=>$file, hash=>$commit),
6648                                               -title => "history"}, 'H');
6649                         }
6650                         $file = esc_path($file);
6651                         print "] ".
6652                               "$file</li>\n";
6653                 }
6654                 if ($format eq 'rss') {
6655                         print "</ul>]]>\n" .
6656                               "</content:encoded>\n" .
6657                               "</item>\n";
6658                 } elsif ($format eq 'atom') {
6659                         print "</ul>\n</div>\n" .
6660                               "</content>\n" .
6661                               "</entry>\n";
6662                 }
6663         }
6664
6665         # end of feed
6666         if ($format eq 'rss') {
6667                 print "</channel>\n</rss>\n";
6668         } elsif ($format eq 'atom') {
6669                 print "</feed>\n";
6670         }
6671 }
6672
6673 sub git_rss {
6674         git_feed('rss');
6675 }
6676
6677 sub git_atom {
6678         git_feed('atom');
6679 }
6680
6681 sub git_opml {
6682         my @list = git_get_projects_list();
6683
6684         print $cgi->header(
6685                 -type => 'text/xml',
6686                 -charset => 'utf-8',
6687                 -content_disposition => 'inline; filename="opml.xml"');
6688
6689         print <<XML;
6690 <?xml version="1.0" encoding="utf-8"?>
6691 <opml version="1.0">
6692 <head>
6693   <title>$site_name OPML Export</title>
6694 </head>
6695 <body>
6696 <outline text="git RSS feeds">
6697 XML
6698
6699         foreach my $pr (@list) {
6700                 my %proj = %$pr;
6701                 my $head = git_get_head_hash($proj{'path'});
6702                 if (!defined $head) {
6703                         next;
6704                 }
6705                 $git_dir = "$projectroot/$proj{'path'}";
6706                 my %co = parse_commit($head);
6707                 if (!%co) {
6708                         next;
6709                 }
6710
6711                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6712                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6713                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6714                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6715         }
6716         print <<XML;
6717 </outline>
6718 </body>
6719 </opml>
6720 XML
6721 }