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; "'$a'" } @_ );
2041 }
2042
2043 # get HEAD ref of given project as hash
2044 sub git_get_head_hash {
2045         return git_get_full_hash(shift, 'HEAD');
2046 }
2047
2048 sub git_get_full_hash {
2049         return git_get_hash(@_);
2050 }
2051
2052 sub git_get_short_hash {
2053         return git_get_hash(@_, '--short=7');
2054 }
2055
2056 sub git_get_hash {
2057         my ($project, $hash, @options) = @_;
2058         my $o_git_dir = $git_dir;
2059         my $retval = undef;
2060         $git_dir = "$projectroot/$project";
2061         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2062             '--verify', '-q', @options, $hash) {
2063                 $retval = <$fd>;
2064                 chomp $retval if defined $retval;
2065                 close $fd;
2066         }
2067         if (defined $o_git_dir) {
2068                 $git_dir = $o_git_dir;
2069         }
2070         return $retval;
2071 }
2072
2073 # get type of given object
2074 sub git_get_type {
2075         my $hash = shift;
2076
2077         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2078         my $type = <$fd>;
2079         close $fd or return;
2080         chomp $type;
2081         return $type;
2082 }
2083
2084 # repository configuration
2085 our $config_file = '';
2086 our %config;
2087
2088 # store multiple values for single key as anonymous array reference
2089 # single values stored directly in the hash, not as [ <value> ]
2090 sub hash_set_multi {
2091         my ($hash, $key, $value) = @_;
2092
2093         if (!exists $hash->{$key}) {
2094                 $hash->{$key} = $value;
2095         } elsif (!ref $hash->{$key}) {
2096                 $hash->{$key} = [ $hash->{$key}, $value ];
2097         } else {
2098                 push @{$hash->{$key}}, $value;
2099         }
2100 }
2101
2102 # return hash of git project configuration
2103 # optionally limited to some section, e.g. 'gitweb'
2104 sub git_parse_project_config {
2105         my $section_regexp = shift;
2106         my %config;
2107
2108         local $/ = "\0";
2109
2110         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2111                 or return;
2112
2113         while (my $keyval = <$fh>) {
2114                 chomp $keyval;
2115                 my ($key, $value) = split(/\n/, $keyval, 2);
2116
2117                 hash_set_multi(\%config, $key, $value)
2118                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2119         }
2120         close $fh;
2121
2122         return %config;
2123 }
2124
2125 # convert config value to boolean: 'true' or 'false'
2126 # no value, number > 0, 'true' and 'yes' values are true
2127 # rest of values are treated as false (never as error)
2128 sub config_to_bool {
2129         my $val = shift;
2130
2131         return 1 if !defined $val;             # section.key
2132
2133         # strip leading and trailing whitespace
2134         $val =~ s/^\s+//;
2135         $val =~ s/\s+$//;
2136
2137         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2138                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2139 }
2140
2141 # convert config value to simple decimal number
2142 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2143 # to be multiplied by 1024, 1048576, or 1073741824
2144 sub config_to_int {
2145         my $val = shift;
2146
2147         # strip leading and trailing whitespace
2148         $val =~ s/^\s+//;
2149         $val =~ s/\s+$//;
2150
2151         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2152                 $unit = lc($unit);
2153                 # unknown unit is treated as 1
2154                 return $num * ($unit eq 'g' ? 1073741824 :
2155                                $unit eq 'm' ?    1048576 :
2156                                $unit eq 'k' ?       1024 : 1);
2157         }
2158         return $val;
2159 }
2160
2161 # convert config value to array reference, if needed
2162 sub config_to_multi {
2163         my $val = shift;
2164
2165         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2166 }
2167
2168 sub git_get_project_config {
2169         my ($key, $type) = @_;
2170
2171         # key sanity check
2172         return unless ($key);
2173         $key =~ s/^gitweb\.//;
2174         return if ($key =~ m/\W/);
2175
2176         # type sanity check
2177         if (defined $type) {
2178                 $type =~ s/^--//;
2179                 $type = undef
2180                         unless ($type eq 'bool' || $type eq 'int');
2181         }
2182
2183         # get config
2184         if (!defined $config_file ||
2185             $config_file ne "$git_dir/config") {
2186                 %config = git_parse_project_config('gitweb');
2187                 $config_file = "$git_dir/config";
2188         }
2189
2190         # check if config variable (key) exists
2191         return unless exists $config{"gitweb.$key"};
2192
2193         # ensure given type
2194         if (!defined $type) {
2195                 return $config{"gitweb.$key"};
2196         } elsif ($type eq 'bool') {
2197                 # backward compatibility: 'git config --bool' returns true/false
2198                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2199         } elsif ($type eq 'int') {
2200                 return config_to_int($config{"gitweb.$key"});
2201         }
2202         return $config{"gitweb.$key"};
2203 }
2204
2205 # get hash of given path at given ref
2206 sub git_get_hash_by_path {
2207         my $base = shift;
2208         my $path = shift || return undef;
2209         my $type = shift;
2210
2211         $path =~ s,/+$,,;
2212
2213         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2214                 or die_error(500, "Open git-ls-tree failed");
2215         my $line = <$fd>;
2216         close $fd or return undef;
2217
2218         if (!defined $line) {
2219                 # there is no tree or hash given by $path at $base
2220                 return undef;
2221         }
2222
2223         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2224         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2225         if (defined $type && $type ne $2) {
2226                 # type doesn't match
2227                 return undef;
2228         }
2229         return $3;
2230 }
2231
2232 # get path of entry with given hash at given tree-ish (ref)
2233 # used to get 'from' filename for combined diff (merge commit) for renames
2234 sub git_get_path_by_hash {
2235         my $base = shift || return;
2236         my $hash = shift || return;
2237
2238         local $/ = "\0";
2239
2240         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2241                 or return undef;
2242         while (my $line = <$fd>) {
2243                 chomp $line;
2244
2245                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2246                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2247                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2248                         close $fd;
2249                         return $1;
2250                 }
2251         }
2252         close $fd;
2253         return undef;
2254 }
2255
2256 ## ......................................................................
2257 ## git utility functions, directly accessing git repository
2258
2259 sub git_get_project_description {
2260         my $path = shift;
2261
2262         $git_dir = "$projectroot/$path";
2263         open my $fd, '<', "$git_dir/description"
2264                 or return git_get_project_config('description');
2265         my $descr = <$fd>;
2266         close $fd;
2267         if (defined $descr) {
2268                 chomp $descr;
2269         }
2270         return $descr;
2271 }
2272
2273 sub git_get_project_ctags {
2274         my $path = shift;
2275         my $ctags = {};
2276
2277         $git_dir = "$projectroot/$path";
2278         opendir my $dh, "$git_dir/ctags"
2279                 or return $ctags;
2280         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2281                 open my $ct, '<', $_ or next;
2282                 my $val = <$ct>;
2283                 chomp $val;
2284                 close $ct;
2285                 my $ctag = $_; $ctag =~ s#.*/##;
2286                 $ctags->{$ctag} = $val;
2287         }
2288         closedir $dh;
2289         $ctags;
2290 }
2291
2292 sub git_populate_project_tagcloud {
2293         my $ctags = shift;
2294
2295         # First, merge different-cased tags; tags vote on casing
2296         my %ctags_lc;
2297         foreach (keys %$ctags) {
2298                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2299                 if (not $ctags_lc{lc $_}->{topcount}
2300                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2301                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2302                         $ctags_lc{lc $_}->{topname} = $_;
2303                 }
2304         }
2305
2306         my $cloud;
2307         if (eval { require HTML::TagCloud; 1; }) {
2308                 $cloud = HTML::TagCloud->new;
2309                 foreach (sort keys %ctags_lc) {
2310                         # Pad the title with spaces so that the cloud looks
2311                         # less crammed.
2312                         my $title = $ctags_lc{$_}->{topname};
2313                         $title =~ s/ /&nbsp;/g;
2314                         $title =~ s/^/&nbsp;/g;
2315                         $title =~ s/$/&nbsp;/g;
2316                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2317                 }
2318         } else {
2319                 $cloud = \%ctags_lc;
2320         }
2321         $cloud;
2322 }
2323
2324 sub git_show_project_tagcloud {
2325         my ($cloud, $count) = @_;
2326         print STDERR ref($cloud)."..\n";
2327         if (ref $cloud eq 'HTML::TagCloud') {
2328                 return $cloud->html_and_css($count);
2329         } else {
2330                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2331                 return '<p align="center">' . join (', ', map {
2332                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2333                 } splice(@tags, 0, $count)) . '</p>';
2334         }
2335 }
2336
2337 sub git_get_project_url_list {
2338         my $path = shift;
2339
2340         $git_dir = "$projectroot/$path";
2341         open my $fd, '<', "$git_dir/cloneurl"
2342                 or return wantarray ?
2343                 @{ config_to_multi(git_get_project_config('url')) } :
2344                    config_to_multi(git_get_project_config('url'));
2345         my @git_project_url_list = map { chomp; $_ } <$fd>;
2346         close $fd;
2347
2348         return wantarray ? @git_project_url_list : \@git_project_url_list;
2349 }
2350
2351 sub git_get_projects_list {
2352         my ($filter) = @_;
2353         my @list;
2354
2355         $filter ||= '';
2356         $filter =~ s/\.git$//;
2357
2358         my $check_forks = gitweb_check_feature('forks');
2359
2360         if (-d $projects_list) {
2361                 # search in directory
2362                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2363                 # remove the trailing "/"
2364                 $dir =~ s!/+$!!;
2365                 my $pfxlen = length("$dir");
2366                 my $pfxdepth = ($dir =~ tr!/!!);
2367
2368                 File::Find::find({
2369                         follow_fast => 1, # follow symbolic links
2370                         follow_skip => 2, # ignore duplicates
2371                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2372                         wanted => sub {
2373                                 # skip project-list toplevel, if we get it.
2374                                 return if (m!^[/.]$!);
2375                                 # only directories can be git repositories
2376                                 return unless (-d $_);
2377                                 # don't traverse too deep (Find is super slow on os x)
2378                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2379                                         $File::Find::prune = 1;
2380                                         return;
2381                                 }
2382
2383                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2384                                 # we check related file in $projectroot
2385                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2386                                 if (check_export_ok("$projectroot/$path")) {
2387                                         push @list, { path => $path };
2388                                         $File::Find::prune = 1;
2389                                 }
2390                         },
2391                 }, "$dir");
2392
2393         } elsif (-f $projects_list) {
2394                 # read from file(url-encoded):
2395                 # 'git%2Fgit.git Linus+Torvalds'
2396                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2397                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2398                 my %paths;
2399                 open my $fd, '<', $projects_list or return;
2400         PROJECT:
2401                 while (my $line = <$fd>) {
2402                         chomp $line;
2403                         my ($path, $owner) = split ' ', $line;
2404                         $path = unescape($path);
2405                         $owner = unescape($owner);
2406                         if (!defined $path) {
2407                                 next;
2408                         }
2409                         if ($filter ne '') {
2410                                 # looking for forks;
2411                                 my $pfx = substr($path, 0, length($filter));
2412                                 if ($pfx ne $filter) {
2413                                         next PROJECT;
2414                                 }
2415                                 my $sfx = substr($path, length($filter));
2416                                 if ($sfx !~ /^\/.*\.git$/) {
2417                                         next PROJECT;
2418                                 }
2419                         } elsif ($check_forks) {
2420                         PATH:
2421                                 foreach my $filter (keys %paths) {
2422                                         # looking for forks;
2423                                         my $pfx = substr($path, 0, length($filter));
2424                                         if ($pfx ne $filter) {
2425                                                 next PATH;
2426                                         }
2427                                         my $sfx = substr($path, length($filter));
2428                                         if ($sfx !~ /^\/.*\.git$/) {
2429                                                 next PATH;
2430                                         }
2431                                         # is a fork, don't include it in
2432                                         # the list
2433                                         next PROJECT;
2434                                 }
2435                         }
2436                         if (check_export_ok("$projectroot/$path")) {
2437                                 my $pr = {
2438                                         path => $path,
2439                                         owner => to_utf8($owner),
2440                                 };
2441                                 push @list, $pr;
2442                                 (my $forks_path = $path) =~ s/\.git$//;
2443                                 $paths{$forks_path}++;
2444                         }
2445                 }
2446                 close $fd;
2447         }
2448         return @list;
2449 }
2450
2451 our $gitweb_project_owner = undef;
2452 sub git_get_project_list_from_file {
2453
2454         return if (defined $gitweb_project_owner);
2455
2456         $gitweb_project_owner = {};
2457         # read from file (url-encoded):
2458         # 'git%2Fgit.git Linus+Torvalds'
2459         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2460         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2461         if (-f $projects_list) {
2462                 open(my $fd, '<', $projects_list);
2463                 while (my $line = <$fd>) {
2464                         chomp $line;
2465                         my ($pr, $ow) = split ' ', $line;
2466                         $pr = unescape($pr);
2467                         $ow = unescape($ow);
2468                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2469                 }
2470                 close $fd;
2471         }
2472 }
2473
2474 sub git_get_project_owner {
2475         my $project = shift;
2476         my $owner;
2477
2478         return undef unless $project;
2479         $git_dir = "$projectroot/$project";
2480
2481         if (!defined $gitweb_project_owner) {
2482                 git_get_project_list_from_file();
2483         }
2484
2485         if (exists $gitweb_project_owner->{$project}) {
2486                 $owner = $gitweb_project_owner->{$project};
2487         }
2488         if (!defined $owner){
2489                 $owner = git_get_project_config('owner');
2490         }
2491         if (!defined $owner) {
2492                 $owner = get_file_owner("$git_dir");
2493         }
2494
2495         return $owner;
2496 }
2497
2498 sub git_get_last_activity {
2499         my ($path) = @_;
2500         my $fd;
2501
2502         $git_dir = "$projectroot/$path";
2503         open($fd, "-|", git_cmd(), 'for-each-ref',
2504              '--format=%(committer)',
2505              '--sort=-committerdate',
2506              '--count=1',
2507              'refs/heads') or return;
2508         my $most_recent = <$fd>;
2509         close $fd or return;
2510         if (defined $most_recent &&
2511             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2512                 my $timestamp = $1;
2513                 my $age = time - $timestamp;
2514                 return ($age, age_string($age));
2515         }
2516         return (undef, undef);
2517 }
2518
2519 sub git_get_references {
2520         my $type = shift || "";
2521         my %refs;
2522         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2523         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2524         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2525                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2526                 or return;
2527
2528         while (my $line = <$fd>) {
2529                 chomp $line;
2530                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2531                         if (defined $refs{$1}) {
2532                                 push @{$refs{$1}}, $2;
2533                         } else {
2534                                 $refs{$1} = [ $2 ];
2535                         }
2536                 }
2537         }
2538         close $fd or return;
2539         return \%refs;
2540 }
2541
2542 sub git_get_rev_name_tags {
2543         my $hash = shift || return undef;
2544
2545         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2546                 or return;
2547         my $name_rev = <$fd>;
2548         close $fd;
2549
2550         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2551                 return $1;
2552         } else {
2553                 # catches also '$hash undefined' output
2554                 return undef;
2555         }
2556 }
2557
2558 ## ----------------------------------------------------------------------
2559 ## parse to hash functions
2560
2561 sub parse_date {
2562         my $epoch = shift;
2563         my $tz = shift || "-0000";
2564
2565         my %date;
2566         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2567         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2568         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2569         $date{'hour'} = $hour;
2570         $date{'minute'} = $min;
2571         $date{'mday'} = $mday;
2572         $date{'day'} = $days[$wday];
2573         $date{'month'} = $months[$mon];
2574         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2575                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2576         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2577                              $mday, $months[$mon], $hour ,$min;
2578         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2579                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2580
2581         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2582         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2583         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2584         $date{'hour_local'} = $hour;
2585         $date{'minute_local'} = $min;
2586         $date{'tz_local'} = $tz;
2587         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2588                                   1900+$year, $mon+1, $mday,
2589                                   $hour, $min, $sec, $tz);
2590         return %date;
2591 }
2592
2593 sub parse_tag {
2594         my $tag_id = shift;
2595         my %tag;
2596         my @comment;
2597
2598         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2599         $tag{'id'} = $tag_id;
2600         while (my $line = <$fd>) {
2601                 chomp $line;
2602                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2603                         $tag{'object'} = $1;
2604                 } elsif ($line =~ m/^type (.+)$/) {
2605                         $tag{'type'} = $1;
2606                 } elsif ($line =~ m/^tag (.+)$/) {
2607                         $tag{'name'} = $1;
2608                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2609                         $tag{'author'} = $1;
2610                         $tag{'author_epoch'} = $2;
2611                         $tag{'author_tz'} = $3;
2612                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2613                                 $tag{'author_name'}  = $1;
2614                                 $tag{'author_email'} = $2;
2615                         } else {
2616                                 $tag{'author_name'} = $tag{'author'};
2617                         }
2618                 } elsif ($line =~ m/--BEGIN/) {
2619                         push @comment, $line;
2620                         last;
2621                 } elsif ($line eq "") {
2622                         last;
2623                 }
2624         }
2625         push @comment, <$fd>;
2626         $tag{'comment'} = \@comment;
2627         close $fd or return;
2628         if (!defined $tag{'name'}) {
2629                 return
2630         };
2631         return %tag
2632 }
2633
2634 sub parse_commit_text {
2635         my ($commit_text, $withparents) = @_;
2636         my @commit_lines = split '\n', $commit_text;
2637         my %co;
2638
2639         pop @commit_lines; # Remove '\0'
2640
2641         if (! @commit_lines) {
2642                 return;
2643         }
2644
2645         my $header = shift @commit_lines;
2646         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2647                 return;
2648         }
2649         ($co{'id'}, my @parents) = split ' ', $header;
2650         while (my $line = shift @commit_lines) {
2651                 last if $line eq "\n";
2652                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2653                         $co{'tree'} = $1;
2654                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2655                         push @parents, $1;
2656                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2657                         $co{'author'} = to_utf8($1);
2658                         $co{'author_epoch'} = $2;
2659                         $co{'author_tz'} = $3;
2660                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2661                                 $co{'author_name'}  = $1;
2662                                 $co{'author_email'} = $2;
2663                         } else {
2664                                 $co{'author_name'} = $co{'author'};
2665                         }
2666                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2667                         $co{'committer'} = to_utf8($1);
2668                         $co{'committer_epoch'} = $2;
2669                         $co{'committer_tz'} = $3;
2670                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2671                                 $co{'committer_name'}  = $1;
2672                                 $co{'committer_email'} = $2;
2673                         } else {
2674                                 $co{'committer_name'} = $co{'committer'};
2675                         }
2676                 }
2677         }
2678         if (!defined $co{'tree'}) {
2679                 return;
2680         };
2681         $co{'parents'} = \@parents;
2682         $co{'parent'} = $parents[0];
2683
2684         foreach my $title (@commit_lines) {
2685                 $title =~ s/^    //;
2686                 if ($title ne "") {
2687                         $co{'title'} = chop_str($title, 80, 5);
2688                         # remove leading stuff of merges to make the interesting part visible
2689                         if (length($title) > 50) {
2690                                 $title =~ s/^Automatic //;
2691                                 $title =~ s/^merge (of|with) /Merge ... /i;
2692                                 if (length($title) > 50) {
2693                                         $title =~ s/(http|rsync):\/\///;
2694                                 }
2695                                 if (length($title) > 50) {
2696                                         $title =~ s/(master|www|rsync)\.//;
2697                                 }
2698                                 if (length($title) > 50) {
2699                                         $title =~ s/kernel.org:?//;
2700                                 }
2701                                 if (length($title) > 50) {
2702                                         $title =~ s/\/pub\/scm//;
2703                                 }
2704                         }
2705                         $co{'title_short'} = chop_str($title, 50, 5);
2706                         last;
2707                 }
2708         }
2709         if (! defined $co{'title'} || $co{'title'} eq "") {
2710                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2711         }
2712         # remove added spaces
2713         foreach my $line (@commit_lines) {
2714                 $line =~ s/^    //;
2715         }
2716         $co{'comment'} = \@commit_lines;
2717
2718         my $age = time - $co{'committer_epoch'};
2719         $co{'age'} = $age;
2720         $co{'age_string'} = age_string($age);
2721         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2722         if ($age > 60*60*24*7*2) {
2723                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2724                 $co{'age_string_age'} = $co{'age_string'};
2725         } else {
2726                 $co{'age_string_date'} = $co{'age_string'};
2727                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2728         }
2729         return %co;
2730 }
2731
2732 sub parse_commit {
2733         my ($commit_id) = @_;
2734         my %co;
2735
2736         local $/ = "\0";
2737
2738         open my $fd, "-|", git_cmd(), "rev-list",
2739                 "--parents",
2740                 "--header",
2741                 "--max-count=1",
2742                 $commit_id,
2743                 "--",
2744                 or die_error(500, "Open git-rev-list failed");
2745         %co = parse_commit_text(<$fd>, 1);
2746         close $fd;
2747
2748         return %co;
2749 }
2750
2751 sub parse_commits {
2752         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2753         my @cos;
2754
2755         $maxcount ||= 1;
2756         $skip ||= 0;
2757
2758         local $/ = "\0";
2759
2760         open my $fd, "-|", git_cmd(), "rev-list",
2761                 "--header",
2762                 @args,
2763                 ("--max-count=" . $maxcount),
2764                 ("--skip=" . $skip),
2765                 @extra_options,
2766                 $commit_id,
2767                 "--",
2768                 ($filename ? ($filename) : ())
2769                 or die_error(500, "Open git-rev-list failed");
2770         while (my $line = <$fd>) {
2771                 my %co = parse_commit_text($line);
2772                 push @cos, \%co;
2773         }
2774         close $fd;
2775
2776         return wantarray ? @cos : \@cos;
2777 }
2778
2779 # parse line of git-diff-tree "raw" output
2780 sub parse_difftree_raw_line {
2781         my $line = shift;
2782         my %res;
2783
2784         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2785         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2786         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2787                 $res{'from_mode'} = $1;
2788                 $res{'to_mode'} = $2;
2789                 $res{'from_id'} = $3;
2790                 $res{'to_id'} = $4;
2791                 $res{'status'} = $5;
2792                 $res{'similarity'} = $6;
2793                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2794                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2795                 } else {
2796                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2797                 }
2798         }
2799         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2800         # combined diff (for merge commit)
2801         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2802                 $res{'nparents'}  = length($1);
2803                 $res{'from_mode'} = [ split(' ', $2) ];
2804                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2805                 $res{'from_id'} = [ split(' ', $3) ];
2806                 $res{'to_id'} = pop @{$res{'from_id'}};
2807                 $res{'status'} = [ split('', $4) ];
2808                 $res{'to_file'} = unquote($5);
2809         }
2810         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2811         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2812                 $res{'commit'} = $1;
2813         }
2814
2815         return wantarray ? %res : \%res;
2816 }
2817
2818 # wrapper: return parsed line of git-diff-tree "raw" output
2819 # (the argument might be raw line, or parsed info)
2820 sub parsed_difftree_line {
2821         my $line_or_ref = shift;
2822
2823         if (ref($line_or_ref) eq "HASH") {
2824                 # pre-parsed (or generated by hand)
2825                 return $line_or_ref;
2826         } else {
2827                 return parse_difftree_raw_line($line_or_ref);
2828         }
2829 }
2830
2831 # parse line of git-ls-tree output
2832 sub parse_ls_tree_line {
2833         my $line = shift;
2834         my %opts = @_;
2835         my %res;
2836
2837         if ($opts{'-l'}) {
2838                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2839                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2840
2841                 $res{'mode'} = $1;
2842                 $res{'type'} = $2;
2843                 $res{'hash'} = $3;
2844                 $res{'size'} = $4;
2845                 if ($opts{'-z'}) {
2846                         $res{'name'} = $5;
2847                 } else {
2848                         $res{'name'} = unquote($5);
2849                 }
2850         } else {
2851                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2852                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2853
2854                 $res{'mode'} = $1;
2855                 $res{'type'} = $2;
2856                 $res{'hash'} = $3;
2857                 if ($opts{'-z'}) {
2858                         $res{'name'} = $4;
2859                 } else {
2860                         $res{'name'} = unquote($4);
2861                 }
2862         }
2863
2864         return wantarray ? %res : \%res;
2865 }
2866
2867 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2868 sub parse_from_to_diffinfo {
2869         my ($diffinfo, $from, $to, @parents) = @_;
2870
2871         if ($diffinfo->{'nparents'}) {
2872                 # combined diff
2873                 $from->{'file'} = [];
2874                 $from->{'href'} = [];
2875                 fill_from_file_info($diffinfo, @parents)
2876                         unless exists $diffinfo->{'from_file'};
2877                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2878                         $from->{'file'}[$i] =
2879                                 defined $diffinfo->{'from_file'}[$i] ?
2880                                         $diffinfo->{'from_file'}[$i] :
2881                                         $diffinfo->{'to_file'};
2882                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2883                                 $from->{'href'}[$i] = href(action=>"blob",
2884                                                            hash_base=>$parents[$i],
2885                                                            hash=>$diffinfo->{'from_id'}[$i],
2886                                                            file_name=>$from->{'file'}[$i]);
2887                         } else {
2888                                 $from->{'href'}[$i] = undef;
2889                         }
2890                 }
2891         } else {
2892                 # ordinary (not combined) diff
2893                 $from->{'file'} = $diffinfo->{'from_file'};
2894                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2895                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2896                                                hash=>$diffinfo->{'from_id'},
2897                                                file_name=>$from->{'file'});
2898                 } else {
2899                         delete $from->{'href'};
2900                 }
2901         }
2902
2903         $to->{'file'} = $diffinfo->{'to_file'};
2904         if (!is_deleted($diffinfo)) { # file exists in result
2905                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2906                                      hash=>$diffinfo->{'to_id'},
2907                                      file_name=>$to->{'file'});
2908         } else {
2909                 delete $to->{'href'};
2910         }
2911 }
2912
2913 ## ......................................................................
2914 ## parse to array of hashes functions
2915
2916 sub git_get_heads_list {
2917         my $limit = shift;
2918         my @headslist;
2919
2920         open my $fd, '-|', git_cmd(), 'for-each-ref',
2921                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2922                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2923                 'refs/heads'
2924                 or return;
2925         while (my $line = <$fd>) {
2926                 my %ref_item;
2927
2928                 chomp $line;
2929                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2930                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2931                 my ($committer, $epoch, $tz) =
2932                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2933                 $ref_item{'fullname'}  = $name;
2934                 $name =~ s!^refs/heads/!!;
2935
2936                 $ref_item{'name'}  = $name;
2937                 $ref_item{'id'}    = $hash;
2938                 $ref_item{'title'} = $title || '(no commit message)';
2939                 $ref_item{'epoch'} = $epoch;
2940                 if ($epoch) {
2941                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2942                 } else {
2943                         $ref_item{'age'} = "unknown";
2944                 }
2945
2946                 push @headslist, \%ref_item;
2947         }
2948         close $fd;
2949
2950         return wantarray ? @headslist : \@headslist;
2951 }
2952
2953 sub git_get_tags_list {
2954         my $limit = shift;
2955         my @tagslist;
2956
2957         open my $fd, '-|', git_cmd(), 'for-each-ref',
2958                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2959                 '--format=%(objectname) %(objecttype) %(refname) '.
2960                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2961                 'refs/tags'
2962                 or return;
2963         while (my $line = <$fd>) {
2964                 my %ref_item;
2965
2966                 chomp $line;
2967                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2968                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2969                 my ($creator, $epoch, $tz) =
2970                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2971                 $ref_item{'fullname'} = $name;
2972                 $name =~ s!^refs/tags/!!;
2973
2974                 $ref_item{'type'} = $type;
2975                 $ref_item{'id'} = $id;
2976                 $ref_item{'name'} = $name;
2977                 if ($type eq "tag") {
2978                         $ref_item{'subject'} = $title;
2979                         $ref_item{'reftype'} = $reftype;
2980                         $ref_item{'refid'}   = $refid;
2981                 } else {
2982                         $ref_item{'reftype'} = $type;
2983                         $ref_item{'refid'}   = $id;
2984                 }
2985
2986                 if ($type eq "tag" || $type eq "commit") {
2987                         $ref_item{'epoch'} = $epoch;
2988                         if ($epoch) {
2989                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2990                         } else {
2991                                 $ref_item{'age'} = "unknown";
2992                         }
2993                 }
2994
2995                 push @tagslist, \%ref_item;
2996         }
2997         close $fd;
2998
2999         return wantarray ? @tagslist : \@tagslist;
3000 }
3001
3002 ## ----------------------------------------------------------------------
3003 ## filesystem-related functions
3004
3005 sub get_file_owner {
3006         my $path = shift;
3007
3008         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3009         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3010         if (!defined $gcos) {
3011                 return undef;
3012         }
3013         my $owner = $gcos;
3014         $owner =~ s/[,;].*$//;
3015         return to_utf8($owner);
3016 }
3017
3018 # assume that file exists
3019 sub insert_file {
3020         my $filename = shift;
3021
3022         open my $fd, '<', $filename;
3023         print map { to_utf8($_) } <$fd>;
3024         close $fd;
3025 }
3026
3027 ## ......................................................................
3028 ## mimetype related functions
3029
3030 sub mimetype_guess_file {
3031         my $filename = shift;
3032         my $mimemap = shift;
3033         -r $mimemap or return undef;
3034
3035         my %mimemap;
3036         open(my $mh, '<', $mimemap) or return undef;
3037         while (<$mh>) {
3038                 next if m/^#/; # skip comments
3039                 my ($mimetype, $exts) = split(/\t+/);
3040                 if (defined $exts) {
3041                         my @exts = split(/\s+/, $exts);
3042                         foreach my $ext (@exts) {
3043                                 $mimemap{$ext} = $mimetype;
3044                         }
3045                 }
3046         }
3047         close($mh);
3048
3049         $filename =~ /\.([^.]*)$/;
3050         return $mimemap{$1};
3051 }
3052
3053 sub mimetype_guess {
3054         my $filename = shift;
3055         my $mime;
3056         $filename =~ /\./ or return undef;
3057
3058         if ($mimetypes_file) {
3059                 my $file = $mimetypes_file;
3060                 if ($file !~ m!^/!) { # if it is relative path
3061                         # it is relative to project
3062                         $file = "$projectroot/$project/$file";
3063                 }
3064                 $mime = mimetype_guess_file($filename, $file);
3065         }
3066         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3067         return $mime;
3068 }
3069
3070 sub blob_mimetype {
3071         my $fd = shift;
3072         my $filename = shift;
3073
3074         if ($filename) {
3075                 my $mime = mimetype_guess($filename);
3076                 $mime and return $mime;
3077         }
3078
3079         # just in case
3080         return $default_blob_plain_mimetype unless $fd;
3081
3082         if (-T $fd) {
3083                 return 'text/plain';
3084         } elsif (! $filename) {
3085                 return 'application/octet-stream';
3086         } elsif ($filename =~ m/\.png$/i) {
3087                 return 'image/png';
3088         } elsif ($filename =~ m/\.gif$/i) {
3089                 return 'image/gif';
3090         } elsif ($filename =~ m/\.jpe?g$/i) {
3091                 return 'image/jpeg';
3092         } else {
3093                 return 'application/octet-stream';
3094         }
3095 }
3096
3097 sub blob_contenttype {
3098         my ($fd, $file_name, $type) = @_;
3099
3100         $type ||= blob_mimetype($fd, $file_name);
3101         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3102                 $type .= "; charset=$default_text_plain_charset";
3103         }
3104
3105         return $type;
3106 }
3107
3108 ## ======================================================================
3109 ## functions printing HTML: header, footer, error page
3110
3111 sub git_header_html {
3112         my $status = shift || "200 OK";
3113         my $expires = shift;
3114
3115         my $title = "$site_name";
3116         if (defined $project) {
3117                 $title .= " - " . to_utf8($project);
3118                 if (defined $action) {
3119                         $title .= "/$action";
3120                         if (defined $file_name) {
3121                                 $title .= " - " . esc_path($file_name);
3122                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3123                                         $title .= "/";
3124                                 }
3125                         }
3126                 }
3127         }
3128         my $content_type;
3129         # require explicit support from the UA if we are to send the page as
3130         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3131         # we have to do this because MSIE sometimes globs '*/*', pretending to
3132         # support xhtml+xml but choking when it gets what it asked for.
3133         if (defined $cgi->http('HTTP_ACCEPT') &&
3134             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3135             $cgi->Accept('application/xhtml+xml') != 0) {
3136                 $content_type = 'application/xhtml+xml';
3137         } else {
3138                 $content_type = 'text/html';
3139         }
3140         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3141                            -status=> $status, -expires => $expires);
3142         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3143         print <<EOF;
3144 <?xml version="1.0" encoding="utf-8"?>
3145 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3146 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3147 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3148 <!-- git core binaries version $git_version -->
3149 <head>
3150 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3151 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3152 <meta name="robots" content="index, nofollow"/>
3153 <title>$title</title>
3154 EOF
3155         # the stylesheet, favicon etc urls won't work correctly with path_info
3156         # unless we set the appropriate base URL
3157         if ($ENV{'PATH_INFO'}) {
3158                 print "<base href=\"".esc_url($base_url)."\" />\n";
3159         }
3160         # print out each stylesheet that exist, providing backwards capability
3161         # for those people who defined $stylesheet in a config file
3162         if (defined $stylesheet) {
3163                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3164         } else {
3165                 foreach my $stylesheet (@stylesheets) {
3166                         next unless $stylesheet;
3167                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3168                 }
3169         }
3170         if (defined $project) {
3171                 my %href_params = get_feed_info();
3172                 if (!exists $href_params{'-title'}) {
3173                         $href_params{'-title'} = 'log';
3174                 }
3175
3176                 foreach my $format qw(RSS Atom) {
3177                         my $type = lc($format);
3178                         my %link_attr = (
3179                                 '-rel' => 'alternate',
3180                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3181                                 '-type' => "application/$type+xml"
3182                         );
3183
3184                         $href_params{'action'} = $type;
3185                         $link_attr{'-href'} = href(%href_params);
3186                         print "<link ".
3187                               "rel=\"$link_attr{'-rel'}\" ".
3188                               "title=\"$link_attr{'-title'}\" ".
3189                               "href=\"$link_attr{'-href'}\" ".
3190                               "type=\"$link_attr{'-type'}\" ".
3191                               "/>\n";
3192
3193                         $href_params{'extra_options'} = '--no-merges';
3194                         $link_attr{'-href'} = href(%href_params);
3195                         $link_attr{'-title'} .= ' (no merges)';
3196                         print "<link ".
3197                               "rel=\"$link_attr{'-rel'}\" ".
3198                               "title=\"$link_attr{'-title'}\" ".
3199                               "href=\"$link_attr{'-href'}\" ".
3200                               "type=\"$link_attr{'-type'}\" ".
3201                               "/>\n";
3202                 }
3203
3204         } else {
3205                 printf('<link rel="alternate" title="%s projects list" '.
3206                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3207                        $site_name, href(project=>undef, action=>"project_index"));
3208                 printf('<link rel="alternate" title="%s projects feeds" '.
3209                        'href="%s" type="text/x-opml" />'."\n",
3210                        $site_name, href(project=>undef, action=>"opml"));
3211         }
3212         if (defined $favicon) {
3213                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3214         }
3215
3216         print "</head>\n" .
3217               "<body>\n";
3218
3219         if (-f $site_header) {
3220                 insert_file($site_header);
3221         }
3222
3223         print "<div class=\"page_header\">\n" .
3224               $cgi->a({-href => esc_url($logo_url),
3225                        -title => $logo_label},
3226                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3227         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3228         if (defined $project) {
3229                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3230                 if (defined $action) {
3231                         print " / $action";
3232                 }
3233                 print "\n";
3234         }
3235         print "</div>\n";
3236
3237         my $have_search = gitweb_check_feature('search');
3238         if (defined $project && $have_search) {
3239                 if (!defined $searchtext) {
3240                         $searchtext = "";
3241                 }
3242                 my $search_hash;
3243                 if (defined $hash_base) {
3244                         $search_hash = $hash_base;
3245                 } elsif (defined $hash) {
3246                         $search_hash = $hash;
3247                 } else {
3248                         $search_hash = "HEAD";
3249                 }
3250                 my $action = $my_uri;
3251                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3252                 if ($use_pathinfo) {
3253                         $action .= "/".esc_url($project);
3254                 }
3255                 print $cgi->startform(-method => "get", -action => $action) .
3256                       "<div class=\"search\">\n" .
3257                       (!$use_pathinfo &&
3258                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3259                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3260                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3261                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3262                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3263                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3264                       " search:\n",
3265                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3266                       "<span title=\"Extended regular expression\">" .
3267                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3268                                      -checked => $search_use_regexp) .
3269                       "</span>" .
3270                       "</div>" .
3271                       $cgi->end_form() . "\n";
3272         }
3273 }
3274
3275 sub git_footer_html {
3276         my $feed_class = 'rss_logo';
3277
3278         print "<div class=\"page_footer\">\n";
3279         if (defined $project) {
3280                 my $descr = git_get_project_description($project);
3281                 if (defined $descr) {
3282                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3283                 }
3284
3285                 my %href_params = get_feed_info();
3286                 if (!%href_params) {
3287                         $feed_class .= ' generic';
3288                 }
3289                 $href_params{'-title'} ||= 'log';
3290
3291                 foreach my $format qw(RSS Atom) {
3292                         $href_params{'action'} = lc($format);
3293                         print $cgi->a({-href => href(%href_params),
3294                                       -title => "$href_params{'-title'} $format feed",
3295                                       -class => $feed_class}, $format)."\n";
3296                 }
3297
3298         } else {
3299                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3300                               -class => $feed_class}, "OPML") . " ";
3301                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3302                               -class => $feed_class}, "TXT") . "\n";
3303         }
3304         print "</div>\n"; # class="page_footer"
3305
3306         if (defined $t0 && gitweb_check_feature('timed')) {
3307                 print "<div id=\"generating_info\">\n";
3308                 print 'This page took '.
3309                       '<span id="generating_time" class="time_span">'.
3310                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3311                       ' seconds </span>'.
3312                       ' and '.
3313                       '<span id="generating_cmd">'.
3314                       $number_of_git_cmds.
3315                       '</span> git commands '.
3316                       " to generate.\n";
3317                 print "</div>\n"; # class="page_footer"
3318         }
3319
3320         if (-f $site_footer) {
3321                 insert_file($site_footer);
3322         }
3323
3324         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3325         if ($action eq 'blame_incremental') {
3326                 print qq!<script type="text/javascript">\n!.
3327                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3328                       qq!           "!. href() .qq!");\n!.
3329                       qq!</script>\n!;
3330         } else {
3331                 print qq!<script type="text/javascript">\n!.
3332                       qq!window.onload = fixLinks;\n!.
3333                       qq!</script>\n!;
3334         }
3335
3336         print "</body>\n" .
3337               "</html>";
3338 }
3339
3340 # die_error(<http_status_code>, <error_message>)
3341 # Example: die_error(404, 'Hash not found')
3342 # By convention, use the following status codes (as defined in RFC 2616):
3343 # 400: Invalid or missing CGI parameters, or
3344 #      requested object exists but has wrong type.
3345 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3346 #      this server or project.
3347 # 404: Requested object/revision/project doesn't exist.
3348 # 500: The server isn't configured properly, or
3349 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3350 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3351 sub die_error {
3352         my $status = shift || 500;
3353         my $error = shift || "Internal server error";
3354
3355         my %http_responses = (400 => '400 Bad Request',
3356                               403 => '403 Forbidden',
3357                               404 => '404 Not Found',
3358                               500 => '500 Internal Server Error');
3359         git_header_html($http_responses{$status});
3360         print <<EOF;
3361 <div class="page_body">
3362 <br /><br />
3363 $status - $error
3364 <br />
3365 </div>
3366 EOF
3367         git_footer_html();
3368         exit;
3369 }
3370
3371 ## ----------------------------------------------------------------------
3372 ## functions printing or outputting HTML: navigation
3373
3374 sub git_print_page_nav {
3375         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3376         $extra = '' if !defined $extra; # pager or formats
3377
3378         my @navs = qw(summary shortlog log commit commitdiff tree);
3379         if ($suppress) {
3380                 @navs = grep { $_ ne $suppress } @navs;
3381         }
3382
3383         my %arg = map { $_ => {action=>$_} } @navs;
3384         if (defined $head) {
3385                 for (qw(commit commitdiff)) {
3386                         $arg{$_}{'hash'} = $head;
3387                 }
3388                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3389                         for (qw(shortlog log)) {
3390                                 $arg{$_}{'hash'} = $head;
3391                         }
3392                 }
3393         }
3394
3395         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3396         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3397
3398         my @actions = gitweb_get_feature('actions');
3399         my %repl = (
3400                 '%' => '%',
3401                 'n' => $project,         # project name
3402                 'f' => $git_dir,         # project path within filesystem
3403                 'h' => $treehead || '',  # current hash ('h' parameter)
3404                 'b' => $treebase || '',  # hash base ('hb' parameter)
3405         );
3406         while (@actions) {
3407                 my ($label, $link, $pos) = splice(@actions,0,3);
3408                 # insert
3409                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3410                 # munch munch
3411                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3412                 $arg{$label}{'_href'} = $link;
3413         }
3414
3415         print "<div class=\"page_nav\">\n" .
3416                 (join " | ",
3417                  map { $_ eq $current ?
3418                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3419                  } @navs);
3420         print "<br/>\n$extra<br/>\n" .
3421               "</div>\n";
3422 }
3423
3424 sub format_paging_nav {
3425         my ($action, $hash, $head, $page, $has_next_link) = @_;
3426         my $paging_nav;
3427
3428
3429         if ($hash ne $head || $page) {
3430                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3431         } else {
3432                 $paging_nav .= "HEAD";
3433         }
3434
3435         if ($page > 0) {
3436                 $paging_nav .= " &sdot; " .
3437                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3438                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3439         } else {
3440                 $paging_nav .= " &sdot; prev";
3441         }
3442
3443         if ($has_next_link) {
3444                 $paging_nav .= " &sdot; " .
3445                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3446                                  -accesskey => "n", -title => "Alt-n"}, "next");
3447         } else {
3448                 $paging_nav .= " &sdot; next";
3449         }
3450
3451         return $paging_nav;
3452 }
3453
3454 ## ......................................................................
3455 ## functions printing or outputting HTML: div
3456
3457 sub git_print_header_div {
3458         my ($action, $title, $hash, $hash_base) = @_;
3459         my %args = ();
3460
3461         $args{'action'} = $action;
3462         $args{'hash'} = $hash if $hash;
3463         $args{'hash_base'} = $hash_base if $hash_base;
3464
3465         print "<div class=\"header\">\n" .
3466               $cgi->a({-href => href(%args), -class => "title"},
3467               $title ? $title : $action) .
3468               "\n</div>\n";
3469 }
3470
3471 sub print_local_time {
3472         my %date = @_;
3473         if ($date{'hour_local'} < 6) {
3474                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3475                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3476         } else {
3477                 printf(" (%02d:%02d %s)",
3478                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3479         }
3480 }
3481
3482 # Outputs the author name and date in long form
3483 sub git_print_authorship {
3484         my $co = shift;
3485         my %opts = @_;
3486         my $tag = $opts{-tag} || 'div';
3487         my $author = $co->{'author_name'};
3488
3489         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3490         print "<$tag class=\"author_date\">" .
3491               format_search_author($author, "author", esc_html($author)) .
3492               " [$ad{'rfc2822'}";
3493         print_local_time(%ad) if ($opts{-localtime});
3494         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3495                   . "</$tag>\n";
3496 }
3497
3498 # Outputs table rows containing the full author or committer information,
3499 # in the format expected for 'commit' view (& similia).
3500 # Parameters are a commit hash reference, followed by the list of people
3501 # to output information for. If the list is empty it defalts to both
3502 # author and committer.
3503 sub git_print_authorship_rows {
3504         my $co = shift;
3505         # too bad we can't use @people = @_ || ('author', 'committer')
3506         my @people = @_;
3507         @people = ('author', 'committer') unless @people;
3508         foreach my $who (@people) {
3509                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3510                 print "<tr><td>$who</td><td>" .
3511                       format_search_author($co->{"${who}_name"}, $who,
3512                                esc_html($co->{"${who}_name"})) . " " .
3513                       format_search_author($co->{"${who}_email"}, $who,
3514                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3515                       "</td><td rowspan=\"2\">" .
3516                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3517                       "</td></tr>\n" .
3518                       "<tr>" .
3519                       "<td></td><td> $wd{'rfc2822'}";
3520                 print_local_time(%wd);
3521                 print "</td>" .
3522                       "</tr>\n";
3523         }
3524 }
3525
3526 sub git_print_page_path {
3527         my $name = shift;
3528         my $type = shift;
3529         my $hb = shift;
3530
3531
3532         print "<div class=\"page_path\">";
3533         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3534                       -title => 'tree root'}, to_utf8("[$project]"));
3535         print " / ";
3536         if (defined $name) {
3537                 my @dirname = split '/', $name;
3538                 my $basename = pop @dirname;
3539                 my $fullname = '';
3540
3541                 foreach my $dir (@dirname) {
3542                         $fullname .= ($fullname ? '/' : '') . $dir;
3543                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3544                                                      hash_base=>$hb),
3545                                       -title => $fullname}, esc_path($dir));
3546                         print " / ";
3547                 }
3548                 if (defined $type && $type eq 'blob') {
3549                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3550                                                      hash_base=>$hb),
3551                                       -title => $name}, esc_path($basename));
3552                 } elsif (defined $type && $type eq 'tree') {
3553                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3554                                                      hash_base=>$hb),
3555                                       -title => $name}, esc_path($basename));
3556                         print " / ";
3557                 } else {
3558                         print esc_path($basename);
3559                 }
3560         }
3561         print "<br/></div>\n";
3562 }
3563
3564 sub git_print_log {
3565         my $log = shift;
3566         my %opts = @_;
3567
3568         if ($opts{'-remove_title'}) {
3569                 # remove title, i.e. first line of log
3570                 shift @$log;
3571         }
3572         # remove leading empty lines
3573         while (defined $log->[0] && $log->[0] eq "") {
3574                 shift @$log;
3575         }
3576
3577         # print log
3578         my $signoff = 0;
3579         my $empty = 0;
3580         foreach my $line (@$log) {
3581                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3582                         $signoff = 1;
3583                         $empty = 0;
3584                         if (! $opts{'-remove_signoff'}) {
3585                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3586                                 next;
3587                         } else {
3588                                 # remove signoff lines
3589                                 next;
3590                         }
3591                 } else {
3592                         $signoff = 0;
3593                 }
3594
3595                 # print only one empty line
3596                 # do not print empty line after signoff
3597                 if ($line eq "") {
3598                         next if ($empty || $signoff);
3599                         $empty = 1;
3600                 } else {
3601                         $empty = 0;
3602                 }
3603
3604                 print format_log_line_html($line) . "<br/>\n";
3605         }
3606
3607         if ($opts{'-final_empty_line'}) {
3608                 # end with single empty line
3609                 print "<br/>\n" unless $empty;
3610         }
3611 }
3612
3613 # return link target (what link points to)
3614 sub git_get_link_target {
3615         my $hash = shift;
3616         my $link_target;
3617
3618         # read link
3619         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3620                 or return;
3621         {
3622                 local $/ = undef;
3623                 $link_target = <$fd>;
3624         }
3625         close $fd
3626                 or return;
3627
3628         return $link_target;
3629 }
3630
3631 # given link target, and the directory (basedir) the link is in,
3632 # return target of link relative to top directory (top tree);
3633 # return undef if it is not possible (including absolute links).
3634 sub normalize_link_target {
3635         my ($link_target, $basedir) = @_;
3636
3637         # absolute symlinks (beginning with '/') cannot be normalized
3638         return if (substr($link_target, 0, 1) eq '/');
3639
3640         # normalize link target to path from top (root) tree (dir)
3641         my $path;
3642         if ($basedir) {
3643                 $path = $basedir . '/' . $link_target;
3644         } else {
3645                 # we are in top (root) tree (dir)
3646                 $path = $link_target;
3647         }
3648
3649         # remove //, /./, and /../
3650         my @path_parts;
3651         foreach my $part (split('/', $path)) {
3652                 # discard '.' and ''
3653                 next if (!$part || $part eq '.');
3654                 # handle '..'
3655                 if ($part eq '..') {
3656                         if (@path_parts) {
3657                                 pop @path_parts;
3658                         } else {
3659                                 # link leads outside repository (outside top dir)
3660                                 return;
3661                         }
3662                 } else {
3663                         push @path_parts, $part;
3664                 }
3665         }
3666         $path = join('/', @path_parts);
3667
3668         return $path;
3669 }
3670
3671 # print tree entry (row of git_tree), but without encompassing <tr> element
3672 sub git_print_tree_entry {
3673         my ($t, $basedir, $hash_base, $have_blame) = @_;
3674
3675         my %base_key = ();
3676         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3677
3678         # The format of a table row is: mode list link.  Where mode is
3679         # the mode of the entry, list is the name of the entry, an href,
3680         # and link is the action links of the entry.
3681
3682         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3683         if (exists $t->{'size'}) {
3684                 print "<td class=\"size\">$t->{'size'}</td>\n";
3685         }
3686         if ($t->{'type'} eq "blob") {
3687                 print "<td class=\"list\">" .
3688                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3689                                                file_name=>"$basedir$t->{'name'}", %base_key),
3690                                 -class => "list"}, esc_path($t->{'name'}));
3691                 if (S_ISLNK(oct $t->{'mode'})) {
3692                         my $link_target = git_get_link_target($t->{'hash'});
3693                         if ($link_target) {
3694                                 my $norm_target = normalize_link_target($link_target, $basedir);
3695                                 if (defined $norm_target) {
3696                                         print " -> " .
3697                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3698                                                                      file_name=>$norm_target),
3699                                                        -title => $norm_target}, esc_path($link_target));
3700                                 } else {
3701                                         print " -> " . esc_path($link_target);
3702                                 }
3703                         }
3704                 }
3705                 print "</td>\n";
3706                 print "<td class=\"link\">";
3707                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3708                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3709                               "blob");
3710                 if ($have_blame) {
3711                         print " | " .
3712                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3713                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3714                                       "blame");
3715                 }
3716                 if (defined $hash_base) {
3717                         print " | " .
3718                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3719                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3720                                       "history");
3721                 }
3722                 print " | " .
3723                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3724                                                file_name=>"$basedir$t->{'name'}")},
3725                                 "raw");
3726                 print "</td>\n";
3727
3728         } elsif ($t->{'type'} eq "tree") {
3729                 print "<td class=\"list\">";
3730                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3731                                              file_name=>"$basedir$t->{'name'}",
3732                                              %base_key)},
3733                               esc_path($t->{'name'}));
3734                 print "</td>\n";
3735                 print "<td class=\"link\">";
3736                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3737                                              file_name=>"$basedir$t->{'name'}",
3738                                              %base_key)},
3739                               "tree");
3740                 if (defined $hash_base) {
3741                         print " | " .
3742                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3743                                                      file_name=>"$basedir$t->{'name'}")},
3744                                       "history");
3745                 }
3746                 print "</td>\n";
3747         } else {
3748                 # unknown object: we can only present history for it
3749                 # (this includes 'commit' object, i.e. submodule support)
3750                 print "<td class=\"list\">" .
3751                       esc_path($t->{'name'}) .
3752                       "</td>\n";
3753                 print "<td class=\"link\">";
3754                 if (defined $hash_base) {
3755                         print $cgi->a({-href => href(action=>"history",
3756                                                      hash_base=>$hash_base,
3757                                                      file_name=>"$basedir$t->{'name'}")},
3758                                       "history");
3759                 }
3760                 print "</td>\n";
3761         }
3762 }
3763
3764 ## ......................................................................
3765 ## functions printing large fragments of HTML
3766
3767 # get pre-image filenames for merge (combined) diff
3768 sub fill_from_file_info {
3769         my ($diff, @parents) = @_;
3770
3771         $diff->{'from_file'} = [ ];
3772         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3773         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3774                 if ($diff->{'status'}[$i] eq 'R' ||
3775                     $diff->{'status'}[$i] eq 'C') {
3776                         $diff->{'from_file'}[$i] =
3777                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3778                 }
3779         }
3780
3781         return $diff;
3782 }
3783
3784 # is current raw difftree line of file deletion
3785 sub is_deleted {
3786         my $diffinfo = shift;
3787
3788         return $diffinfo->{'to_id'} eq ('0' x 40);
3789 }
3790
3791 # does patch correspond to [previous] difftree raw line
3792 # $diffinfo  - hashref of parsed raw diff format
3793 # $patchinfo - hashref of parsed patch diff format
3794 #              (the same keys as in $diffinfo)
3795 sub is_patch_split {
3796         my ($diffinfo, $patchinfo) = @_;
3797
3798         return defined $diffinfo && defined $patchinfo
3799                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3800 }
3801
3802
3803 sub git_difftree_body {
3804         my ($difftree, $hash, @parents) = @_;
3805         my ($parent) = $parents[0];
3806         my $have_blame = gitweb_check_feature('blame');
3807         print "<div class=\"list_head\">\n";
3808         if ($#{$difftree} > 10) {
3809                 print(($#{$difftree} + 1) . " files changed:\n");
3810         }
3811         print "</div>\n";
3812
3813         print "<table class=\"" .
3814               (@parents > 1 ? "combined " : "") .
3815               "diff_tree\">\n";
3816
3817         # header only for combined diff in 'commitdiff' view
3818         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3819         if ($has_header) {
3820                 # table header
3821                 print "<thead><tr>\n" .
3822                        "<th></th><th></th>\n"; # filename, patchN link
3823                 for (my $i = 0; $i < @parents; $i++) {
3824                         my $par = $parents[$i];
3825                         print "<th>" .
3826                               $cgi->a({-href => href(action=>"commitdiff",
3827                                                      hash=>$hash, hash_parent=>$par),
3828                                        -title => 'commitdiff to parent number ' .
3829                                                   ($i+1) . ': ' . substr($par,0,7)},
3830                                       $i+1) .
3831                               "&nbsp;</th>\n";
3832                 }
3833                 print "</tr></thead>\n<tbody>\n";
3834         }
3835
3836         my $alternate = 1;
3837         my $patchno = 0;
3838         foreach my $line (@{$difftree}) {
3839                 my $diff = parsed_difftree_line($line);
3840
3841                 if ($alternate) {
3842                         print "<tr class=\"dark\">\n";
3843                 } else {
3844                         print "<tr class=\"light\">\n";
3845                 }
3846                 $alternate ^= 1;
3847
3848                 if (exists $diff->{'nparents'}) { # combined diff
3849
3850                         fill_from_file_info($diff, @parents)
3851                                 unless exists $diff->{'from_file'};
3852
3853                         if (!is_deleted($diff)) {
3854                                 # file exists in the result (child) commit
3855                                 print "<td>" .
3856                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3857                                                              file_name=>$diff->{'to_file'},
3858                                                              hash_base=>$hash),
3859                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3860                                       "</td>\n";
3861                         } else {
3862                                 print "<td>" .
3863                                       esc_path($diff->{'to_file'}) .
3864                                       "</td>\n";
3865                         }
3866
3867                         if ($action eq 'commitdiff') {
3868                                 # link to patch
3869                                 $patchno++;
3870                                 print "<td class=\"link\">" .
3871                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3872                                       " | " .
3873                                       "</td>\n";
3874                         }
3875
3876                         my $has_history = 0;
3877                         my $not_deleted = 0;
3878                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3879                                 my $hash_parent = $parents[$i];
3880                                 my $from_hash = $diff->{'from_id'}[$i];
3881                                 my $from_path = $diff->{'from_file'}[$i];
3882                                 my $status = $diff->{'status'}[$i];
3883
3884                                 $has_history ||= ($status ne 'A');
3885                                 $not_deleted ||= ($status ne 'D');
3886
3887                                 if ($status eq 'A') {
3888                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3889                                 } elsif ($status eq 'D') {
3890                                         print "<td class=\"link\">" .
3891                                               $cgi->a({-href => href(action=>"blob",
3892                                                                      hash_base=>$hash,
3893                                                                      hash=>$from_hash,
3894                                                                      file_name=>$from_path)},
3895                                                       "blob" . ($i+1)) .
3896                                               " | </td>\n";
3897                                 } else {
3898                                         if ($diff->{'to_id'} eq $from_hash) {
3899                                                 print "<td class=\"link nochange\">";
3900                                         } else {
3901                                                 print "<td class=\"link\">";
3902                                         }
3903                                         print $cgi->a({-href => href(action=>"blobdiff",
3904                                                                      hash=>$diff->{'to_id'},
3905                                                                      hash_parent=>$from_hash,
3906                                                                      hash_base=>$hash,
3907                                                                      hash_parent_base=>$hash_parent,
3908                                                                      file_name=>$diff->{'to_file'},
3909                                                                      file_parent=>$from_path)},
3910                                                       "diff" . ($i+1)) .
3911                                               " | </td>\n";
3912                                 }
3913                         }
3914
3915                         print "<td class=\"link\">";
3916                         if ($not_deleted) {
3917                                 print $cgi->a({-href => href(action=>"blob",
3918                                                              hash=>$diff->{'to_id'},
3919                                                              file_name=>$diff->{'to_file'},
3920                                                              hash_base=>$hash)},
3921                                               "blob");
3922                                 print " | " if ($has_history);
3923                         }
3924                         if ($has_history) {
3925                                 print $cgi->a({-href => href(action=>"history",
3926                                                              file_name=>$diff->{'to_file'},
3927                                                              hash_base=>$hash)},
3928                                               "history");
3929                         }
3930                         print "</td>\n";
3931
3932                         print "</tr>\n";
3933                         next; # instead of 'else' clause, to avoid extra indent
3934                 }
3935                 # else ordinary diff
3936
3937                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3938                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3939                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3940                         $to_mode_oct = oct $diff->{'to_mode'};
3941                         if (S_ISREG($to_mode_oct)) { # only for regular file
3942                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3943                         }
3944                         $to_file_type = file_type($diff->{'to_mode'});
3945                 }
3946                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3947                         $from_mode_oct = oct $diff->{'from_mode'};
3948                         if (S_ISREG($to_mode_oct)) { # only for regular file
3949                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3950                         }
3951                         $from_file_type = file_type($diff->{'from_mode'});
3952                 }
3953
3954                 if ($diff->{'status'} eq "A") { # created
3955                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3956                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3957                         $mode_chng   .= "]</span>";
3958                         print "<td>";
3959                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3960                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3961                                       -class => "list"}, esc_path($diff->{'file'}));
3962                         print "</td>\n";
3963                         print "<td>$mode_chng</td>\n";
3964                         print "<td class=\"link\">";
3965                         if ($action eq 'commitdiff') {
3966                                 # link to patch
3967                                 $patchno++;
3968                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3969                                 print " | ";
3970                         }
3971                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3972                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3973                                       "blob");
3974                         print "</td>\n";
3975
3976                 } elsif ($diff->{'status'} eq "D") { # deleted
3977                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3978                         print "<td>";
3979                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3980                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3981                                        -class => "list"}, esc_path($diff->{'file'}));
3982                         print "</td>\n";
3983                         print "<td>$mode_chng</td>\n";
3984                         print "<td class=\"link\">";
3985                         if ($action eq 'commitdiff') {
3986                                 # link to patch
3987                                 $patchno++;
3988                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3989                                 print " | ";
3990                         }
3991                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3992                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3993                                       "blob") . " | ";
3994                         if ($have_blame) {
3995                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3996                                                              file_name=>$diff->{'file'})},
3997                                               "blame") . " | ";
3998                         }
3999                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4000                                                      file_name=>$diff->{'file'})},
4001                                       "history");
4002                         print "</td>\n";
4003
4004                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4005                         my $mode_chnge = "";
4006                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4007                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4008                                 if ($from_file_type ne $to_file_type) {
4009                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4010                                 }
4011                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4012                                         if ($from_mode_str && $to_mode_str) {
4013                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4014                                         } elsif ($to_mode_str) {
4015                                                 $mode_chnge .= " mode: $to_mode_str";
4016                                         }
4017                                 }
4018                                 $mode_chnge .= "]</span>\n";
4019                         }
4020                         print "<td>";
4021                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4022                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4023                                       -class => "list"}, esc_path($diff->{'file'}));
4024                         print "</td>\n";
4025                         print "<td>$mode_chnge</td>\n";
4026                         print "<td class=\"link\">";
4027                         if ($action eq 'commitdiff') {
4028                                 # link to patch
4029                                 $patchno++;
4030                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4031                                       " | ";
4032                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4033                                 # "commit" view and modified file (not onlu mode changed)
4034                                 print $cgi->a({-href => href(action=>"blobdiff",
4035                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4036                                                              hash_base=>$hash, hash_parent_base=>$parent,
4037                                                              file_name=>$diff->{'file'})},
4038                                               "diff") .
4039                                       " | ";
4040                         }
4041                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4042                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4043                                        "blob") . " | ";
4044                         if ($have_blame) {
4045                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4046                                                              file_name=>$diff->{'file'})},
4047                                               "blame") . " | ";
4048                         }
4049                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4050                                                      file_name=>$diff->{'file'})},
4051                                       "history");
4052                         print "</td>\n";
4053
4054                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4055                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4056                         my $nstatus = $status_name{$diff->{'status'}};
4057                         my $mode_chng = "";
4058                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4059                                 # mode also for directories, so we cannot use $to_mode_str
4060                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4061                         }
4062                         print "<td>" .
4063                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4064                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4065                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4066                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4067                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4068                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4069                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4070                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4071                               "<td class=\"link\">";
4072                         if ($action eq 'commitdiff') {
4073                                 # link to patch
4074                                 $patchno++;
4075                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4076                                       " | ";
4077                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4078                                 # "commit" view and modified file (not only pure rename or copy)
4079                                 print $cgi->a({-href => href(action=>"blobdiff",
4080                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4081                                                              hash_base=>$hash, hash_parent_base=>$parent,
4082                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4083                                               "diff") .
4084                                       " | ";
4085                         }
4086                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4087                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4088                                       "blob") . " | ";
4089                         if ($have_blame) {
4090                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4091                                                              file_name=>$diff->{'to_file'})},
4092                                               "blame") . " | ";
4093                         }
4094                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4095                                                     file_name=>$diff->{'to_file'})},
4096                                       "history");
4097                         print "</td>\n";
4098
4099                 } # we should not encounter Unmerged (U) or Unknown (X) status
4100                 print "</tr>\n";
4101         }
4102         print "</tbody>" if $has_header;
4103         print "</table>\n";
4104 }
4105
4106 sub git_patchset_body {
4107         my ($fd, $difftree, $hash, @hash_parents) = @_;
4108         my ($hash_parent) = $hash_parents[0];
4109
4110         my $is_combined = (@hash_parents > 1);
4111         my $patch_idx = 0;
4112         my $patch_number = 0;
4113         my $patch_line;
4114         my $diffinfo;
4115         my $to_name;
4116         my (%from, %to);
4117
4118         print "<div class=\"patchset\">\n";
4119
4120         # skip to first patch
4121         while ($patch_line = <$fd>) {
4122                 chomp $patch_line;
4123
4124                 last if ($patch_line =~ m/^diff /);
4125         }
4126
4127  PATCH:
4128         while ($patch_line) {
4129
4130                 # parse "git diff" header line
4131                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4132                         # $1 is from_name, which we do not use
4133                         $to_name = unquote($2);
4134                         $to_name =~ s!^b/!!;
4135                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4136                         # $1 is 'cc' or 'combined', which we do not use
4137                         $to_name = unquote($2);
4138                 } else {
4139                         $to_name = undef;
4140                 }
4141
4142                 # check if current patch belong to current raw line
4143                 # and parse raw git-diff line if needed
4144                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4145                         # this is continuation of a split patch
4146                         print "<div class=\"patch cont\">\n";
4147                 } else {
4148                         # advance raw git-diff output if needed
4149                         $patch_idx++ if defined $diffinfo;
4150
4151                         # read and prepare patch information
4152                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4153
4154                         # compact combined diff output can have some patches skipped
4155                         # find which patch (using pathname of result) we are at now;
4156                         if ($is_combined) {
4157                                 while ($to_name ne $diffinfo->{'to_file'}) {
4158                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4159                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4160                                               "</div>\n";  # class="patch"
4161
4162                                         $patch_idx++;
4163                                         $patch_number++;
4164
4165                                         last if $patch_idx > $#$difftree;
4166                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4167                                 }
4168                         }
4169
4170                         # modifies %from, %to hashes
4171                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4172
4173                         # this is first patch for raw difftree line with $patch_idx index
4174                         # we index @$difftree array from 0, but number patches from 1
4175                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4176                 }
4177
4178                 # git diff header
4179                 #assert($patch_line =~ m/^diff /) if DEBUG;
4180                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4181                 $patch_number++;
4182                 # print "git diff" header
4183                 print format_git_diff_header_line($patch_line, $diffinfo,
4184                                                   \%from, \%to);
4185
4186                 # print extended diff header
4187                 print "<div class=\"diff extended_header\">\n";
4188         EXTENDED_HEADER:
4189                 while ($patch_line = <$fd>) {
4190                         chomp $patch_line;
4191
4192                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4193
4194                         print format_extended_diff_header_line($patch_line, $diffinfo,
4195                                                                \%from, \%to);
4196                 }
4197                 print "</div>\n"; # class="diff extended_header"
4198
4199                 # from-file/to-file diff header
4200                 if (! $patch_line) {
4201                         print "</div>\n"; # class="patch"
4202                         last PATCH;
4203                 }
4204                 next PATCH if ($patch_line =~ m/^diff /);
4205                 #assert($patch_line =~ m/^---/) if DEBUG;
4206
4207                 my $last_patch_line = $patch_line;
4208                 $patch_line = <$fd>;
4209                 chomp $patch_line;
4210                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4211
4212                 print format_diff_from_to_header($last_patch_line, $patch_line,
4213                                                  $diffinfo, \%from, \%to,
4214                                                  @hash_parents);
4215
4216                 # the patch itself
4217         LINE:
4218                 while ($patch_line = <$fd>) {
4219                         chomp $patch_line;
4220
4221                         next PATCH if ($patch_line =~ m/^diff /);
4222
4223                         print format_diff_line($patch_line, \%from, \%to);
4224                 }
4225
4226         } continue {
4227                 print "</div>\n"; # class="patch"
4228         }
4229
4230         # for compact combined (--cc) format, with chunk and patch simpliciaction
4231         # patchset might be empty, but there might be unprocessed raw lines
4232         for (++$patch_idx if $patch_number > 0;
4233              $patch_idx < @$difftree;
4234              ++$patch_idx) {
4235                 # read and prepare patch information
4236                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4237
4238                 # generate anchor for "patch" links in difftree / whatchanged part
4239                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4240                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4241                       "</div>\n";  # class="patch"
4242
4243                 $patch_number++;
4244         }
4245
4246         if ($patch_number == 0) {
4247                 if (@hash_parents > 1) {
4248                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4249                 } else {
4250                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4251                 }
4252         }
4253
4254         print "</div>\n"; # class="patchset"
4255 }
4256
4257 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4258
4259 # fills project list info (age, description, owner, forks) for each
4260 # project in the list, removing invalid projects from returned list
4261 # NOTE: modifies $projlist, but does not remove entries from it
4262 sub fill_project_list_info {
4263         my ($projlist, $check_forks) = @_;
4264         my @projects;
4265
4266         my $show_ctags = gitweb_check_feature('ctags');
4267  PROJECT:
4268         foreach my $pr (@$projlist) {
4269                 my (@activity) = git_get_last_activity($pr->{'path'});
4270                 unless (@activity) {
4271                         next PROJECT;
4272                 }
4273                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4274                 if (!defined $pr->{'descr'}) {
4275                         my $descr = git_get_project_description($pr->{'path'}) || "";
4276                         $descr = to_utf8($descr);
4277                         $pr->{'descr_long'} = $descr;
4278                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4279                 }
4280                 if (!defined $pr->{'owner'}) {
4281                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4282                 }
4283                 if ($check_forks) {
4284                         my $pname = $pr->{'path'};
4285                         if (($pname =~ s/\.git$//) &&
4286                             ($pname !~ /\/$/) &&
4287                             (-d "$projectroot/$pname")) {
4288                                 $pr->{'forks'} = "-d $projectroot/$pname";
4289                         } else {
4290                                 $pr->{'forks'} = 0;
4291                         }
4292                 }
4293                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4294                 push @projects, $pr;
4295         }
4296
4297         return @projects;
4298 }
4299
4300 # print 'sort by' <th> element, generating 'sort by $name' replay link
4301 # if that order is not selected
4302 sub print_sort_th {
4303         my ($name, $order, $header) = @_;
4304         $header ||= ucfirst($name);
4305
4306         if ($order eq $name) {
4307                 print "<th>$header</th>\n";
4308         } else {
4309                 print "<th>" .
4310                       $cgi->a({-href => href(-replay=>1, order=>$name),
4311                                -class => "header"}, $header) .
4312                       "</th>\n";
4313         }
4314 }
4315
4316 sub git_project_list_body {
4317         # actually uses global variable $project
4318         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4319
4320         my $check_forks = gitweb_check_feature('forks');
4321         my @projects = fill_project_list_info($projlist, $check_forks);
4322
4323         $order ||= $default_projects_order;
4324         $from = 0 unless defined $from;
4325         $to = $#projects if (!defined $to || $#projects < $to);
4326
4327         my %order_info = (
4328                 project => { key => 'path', type => 'str' },
4329                 descr => { key => 'descr_long', type => 'str' },
4330                 owner => { key => 'owner', type => 'str' },
4331                 age => { key => 'age', type => 'num' }
4332         );
4333         my $oi = $order_info{$order};
4334         if ($oi->{'type'} eq 'str') {
4335                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4336         } else {
4337                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4338         }
4339
4340         my $show_ctags = gitweb_check_feature('ctags');
4341         if ($show_ctags) {
4342                 my %ctags;
4343                 foreach my $p (@projects) {
4344                         foreach my $ct (keys %{$p->{'ctags'}}) {
4345                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4346                         }
4347                 }
4348                 my $cloud = git_populate_project_tagcloud(\%ctags);
4349                 print git_show_project_tagcloud($cloud, 64);
4350         }
4351
4352         print "<table class=\"project_list\">\n";
4353         unless ($no_header) {
4354                 print "<tr>\n";
4355                 if ($check_forks) {
4356                         print "<th></th>\n";
4357                 }
4358                 print_sort_th('project', $order, 'Project');
4359                 print_sort_th('descr', $order, 'Description');
4360                 print_sort_th('owner', $order, 'Owner');
4361                 print_sort_th('age', $order, 'Last Change');
4362                 print "<th></th>\n" . # for links
4363                       "</tr>\n";
4364         }
4365         my $alternate = 1;
4366         my $tagfilter = $cgi->param('by_tag');
4367         for (my $i = $from; $i <= $to; $i++) {
4368                 my $pr = $projects[$i];
4369
4370                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4371                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4372                         and not $pr->{'descr_long'} =~ /$searchtext/;
4373                 # Weed out forks or non-matching entries of search
4374                 if ($check_forks) {
4375                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4376                         $forkbase="^$forkbase" if $forkbase;
4377                         next if not $searchtext and not $tagfilter and $show_ctags
4378                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4379                 }
4380
4381                 if ($alternate) {
4382                         print "<tr class=\"dark\">\n";
4383                 } else {
4384                         print "<tr class=\"light\">\n";
4385                 }
4386                 $alternate ^= 1;
4387                 if ($check_forks) {
4388                         print "<td>";
4389                         if ($pr->{'forks'}) {
4390                                 print "<!-- $pr->{'forks'} -->\n";
4391                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4392                         }
4393                         print "</td>\n";
4394                 }
4395                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4396                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4397                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4398                                         -class => "list", -title => $pr->{'descr_long'}},
4399                                         esc_html($pr->{'descr'})) . "</td>\n" .
4400                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4401                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4402                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4403                       "<td class=\"link\">" .
4404                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4405                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4406                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4407                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4408                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4409                       "</td>\n" .
4410                       "</tr>\n";
4411         }
4412         if (defined $extra) {
4413                 print "<tr>\n";
4414                 if ($check_forks) {
4415                         print "<td></td>\n";
4416                 }
4417                 print "<td colspan=\"5\">$extra</td>\n" .
4418                       "</tr>\n";
4419         }
4420         print "</table>\n";
4421 }
4422
4423 sub git_log_body {
4424         # uses global variable $project
4425         my ($commitlist, $from, $to, $refs, $extra) = @_;
4426
4427         $from = 0 unless defined $from;
4428         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4429
4430         for (my $i = 0; $i <= $to; $i++) {
4431                 my %co = %{$commitlist->[$i]};
4432                 next if !%co;
4433                 my $commit = $co{'id'};
4434                 my $ref = format_ref_marker($refs, $commit);
4435                 my %ad = parse_date($co{'author_epoch'});
4436                 git_print_header_div('commit',
4437                                "<span class=\"age\">$co{'age_string'}</span>" .
4438                                esc_html($co{'title'}) . $ref,
4439                                $commit);
4440                 print "<div class=\"title_text\">\n" .
4441                       "<div class=\"log_link\">\n" .
4442                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4443                       " | " .
4444                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4445                       " | " .
4446                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4447                       "<br/>\n" .
4448                       "</div>\n";
4449                       git_print_authorship(\%co, -tag => 'span');
4450                       print "<br/>\n</div>\n";
4451
4452                 print "<div class=\"log_body\">\n";
4453                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4454                 print "</div>\n";
4455         }
4456         if ($extra) {
4457                 print "<div class=\"page_nav\">\n";
4458                 print "$extra\n";
4459                 print "</div>\n";
4460         }
4461 }
4462
4463 sub git_shortlog_body {
4464         # uses global variable $project
4465         my ($commitlist, $from, $to, $refs, $extra) = @_;
4466
4467         $from = 0 unless defined $from;
4468         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4469
4470         print "<table class=\"shortlog\">\n";
4471         my $alternate = 1;
4472         for (my $i = $from; $i <= $to; $i++) {
4473                 my %co = %{$commitlist->[$i]};
4474                 my $commit = $co{'id'};
4475                 my $ref = format_ref_marker($refs, $commit);
4476                 if ($alternate) {
4477                         print "<tr class=\"dark\">\n";
4478                 } else {
4479                         print "<tr class=\"light\">\n";
4480                 }
4481                 $alternate ^= 1;
4482                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4483                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4484                       format_author_html('td', \%co, 10) . "<td>";
4485                 print format_subject_html($co{'title'}, $co{'title_short'},
4486                                           href(action=>"commit", hash=>$commit), $ref);
4487                 print "</td>\n" .
4488                       "<td class=\"link\">" .
4489                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4490                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4491                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4492                 my $snapshot_links = format_snapshot_links($commit);
4493                 if (defined $snapshot_links) {
4494                         print " | " . $snapshot_links;
4495                 }
4496                 print "</td>\n" .
4497                       "</tr>\n";
4498         }
4499         if (defined $extra) {
4500                 print "<tr>\n" .
4501                       "<td colspan=\"4\">$extra</td>\n" .
4502                       "</tr>\n";
4503         }
4504         print "</table>\n";
4505 }
4506
4507 sub git_history_body {
4508         # Warning: assumes constant type (blob or tree) during history
4509         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4510
4511         $from = 0 unless defined $from;
4512         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4513
4514         print "<table class=\"history\">\n";
4515         my $alternate = 1;
4516         for (my $i = $from; $i <= $to; $i++) {
4517                 my %co = %{$commitlist->[$i]};
4518                 if (!%co) {
4519                         next;
4520                 }
4521                 my $commit = $co{'id'};
4522
4523                 my $ref = format_ref_marker($refs, $commit);
4524
4525                 if ($alternate) {
4526                         print "<tr class=\"dark\">\n";
4527                 } else {
4528                         print "<tr class=\"light\">\n";
4529                 }
4530                 $alternate ^= 1;
4531                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4532         # shortlog:   format_author_html('td', \%co, 10)
4533                       format_author_html('td', \%co, 15, 3) . "<td>";
4534                 # originally git_history used chop_str($co{'title'}, 50)
4535                 print format_subject_html($co{'title'}, $co{'title_short'},
4536                                           href(action=>"commit", hash=>$commit), $ref);
4537                 print "</td>\n" .
4538                       "<td class=\"link\">" .
4539                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4540                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4541
4542                 if ($ftype eq 'blob') {
4543                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4544                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4545                         if (defined $blob_current && defined $blob_parent &&
4546                                         $blob_current ne $blob_parent) {
4547                                 print " | " .
4548                                         $cgi->a({-href => href(action=>"blobdiff",
4549                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4550                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4551                                                                file_name=>$file_name)},
4552                                                 "diff to current");
4553                         }
4554                 }
4555                 print "</td>\n" .
4556                       "</tr>\n";
4557         }
4558         if (defined $extra) {
4559                 print "<tr>\n" .
4560                       "<td colspan=\"4\">$extra</td>\n" .
4561                       "</tr>\n";
4562         }
4563         print "</table>\n";
4564 }
4565
4566 sub git_tags_body {
4567         # uses global variable $project
4568         my ($taglist, $from, $to, $extra) = @_;
4569         $from = 0 unless defined $from;
4570         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4571
4572         print "<table class=\"tags\">\n";
4573         my $alternate = 1;
4574         for (my $i = $from; $i <= $to; $i++) {
4575                 my $entry = $taglist->[$i];
4576                 my %tag = %$entry;
4577                 my $comment = $tag{'subject'};
4578                 my $comment_short;
4579                 if (defined $comment) {
4580                         $comment_short = chop_str($comment, 30, 5);
4581                 }
4582                 if ($alternate) {
4583                         print "<tr class=\"dark\">\n";
4584                 } else {
4585                         print "<tr class=\"light\">\n";
4586                 }
4587                 $alternate ^= 1;
4588                 if (defined $tag{'age'}) {
4589                         print "<td><i>$tag{'age'}</i></td>\n";
4590                 } else {
4591                         print "<td></td>\n";
4592                 }
4593                 print "<td>" .
4594                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4595                                -class => "list name"}, esc_html($tag{'name'})) .
4596                       "</td>\n" .
4597                       "<td>";
4598                 if (defined $comment) {
4599                         print format_subject_html($comment, $comment_short,
4600                                                   href(action=>"tag", hash=>$tag{'id'}));
4601                 }
4602                 print "</td>\n" .
4603                       "<td class=\"selflink\">";
4604                 if ($tag{'type'} eq "tag") {
4605                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4606                 } else {
4607                         print "&nbsp;";
4608                 }
4609                 print "</td>\n" .
4610                       "<td class=\"link\">" . " | " .
4611                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4612                 if ($tag{'reftype'} eq "commit") {
4613                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4614                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4615                 } elsif ($tag{'reftype'} eq "blob") {
4616                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4617                 }
4618                 print "</td>\n" .
4619                       "</tr>";
4620         }
4621         if (defined $extra) {
4622                 print "<tr>\n" .
4623                       "<td colspan=\"5\">$extra</td>\n" .
4624                       "</tr>\n";
4625         }
4626         print "</table>\n";
4627 }
4628
4629 sub git_heads_body {
4630         # uses global variable $project
4631         my ($headlist, $head, $from, $to, $extra) = @_;
4632         $from = 0 unless defined $from;
4633         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4634
4635         print "<table class=\"heads\">\n";
4636         my $alternate = 1;
4637         for (my $i = $from; $i <= $to; $i++) {
4638                 my $entry = $headlist->[$i];
4639                 my %ref = %$entry;
4640                 my $curr = $ref{'id'} eq $head;
4641                 if ($alternate) {
4642                         print "<tr class=\"dark\">\n";
4643                 } else {
4644                         print "<tr class=\"light\">\n";
4645                 }
4646                 $alternate ^= 1;
4647                 print "<td><i>$ref{'age'}</i></td>\n" .
4648                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4649                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4650                                -class => "list name"},esc_html($ref{'name'})) .
4651                       "</td>\n" .
4652                       "<td class=\"link\">" .
4653                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4654                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4655                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4656                       "</td>\n" .
4657                       "</tr>";
4658         }
4659         if (defined $extra) {
4660                 print "<tr>\n" .
4661                       "<td colspan=\"3\">$extra</td>\n" .
4662                       "</tr>\n";
4663         }
4664         print "</table>\n";
4665 }
4666
4667 sub git_search_grep_body {
4668         my ($commitlist, $from, $to, $extra) = @_;
4669         $from = 0 unless defined $from;
4670         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4671
4672         print "<table class=\"commit_search\">\n";
4673         my $alternate = 1;
4674         for (my $i = $from; $i <= $to; $i++) {
4675                 my %co = %{$commitlist->[$i]};
4676                 if (!%co) {
4677                         next;
4678                 }
4679                 my $commit = $co{'id'};
4680                 if ($alternate) {
4681                         print "<tr class=\"dark\">\n";
4682                 } else {
4683                         print "<tr class=\"light\">\n";
4684                 }
4685                 $alternate ^= 1;
4686                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4687                       format_author_html('td', \%co, 15, 5) .
4688                       "<td>" .
4689                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4690                                -class => "list subject"},
4691                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4692                 my $comment = $co{'comment'};
4693                 foreach my $line (@$comment) {
4694                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4695                                 my ($lead, $match, $trail) = ($1, $2, $3);
4696                                 $match = chop_str($match, 70, 5, 'center');
4697                                 my $contextlen = int((80 - length($match))/2);
4698                                 $contextlen = 30 if ($contextlen > 30);
4699                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4700                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4701
4702                                 $lead  = esc_html($lead);
4703                                 $match = esc_html($match);
4704                                 $trail = esc_html($trail);
4705
4706                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4707                         }
4708                 }
4709                 print "</td>\n" .
4710                       "<td class=\"link\">" .
4711                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4712                       " | " .
4713                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4714                       " | " .
4715                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4716                 print "</td>\n" .
4717                       "</tr>\n";
4718         }
4719         if (defined $extra) {
4720                 print "<tr>\n" .
4721                       "<td colspan=\"3\">$extra</td>\n" .
4722                       "</tr>\n";
4723         }
4724         print "</table>\n";
4725 }
4726
4727 ## ======================================================================
4728 ## ======================================================================
4729 ## actions
4730
4731 sub git_project_list {
4732         my $order = $input_params{'order'};
4733         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4734                 die_error(400, "Unknown order parameter");
4735         }
4736
4737         my @list = git_get_projects_list();
4738         if (!@list) {
4739                 die_error(404, "No projects found");
4740         }
4741
4742         git_header_html();
4743         if (-f $home_text) {
4744                 print "<div class=\"index_include\">\n";
4745                 insert_file($home_text);
4746                 print "</div>\n";
4747         }
4748         print $cgi->startform(-method => "get") .
4749               "<p class=\"projsearch\">Search:\n" .
4750               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4751               "</p>" .
4752               $cgi->end_form() . "\n";
4753         git_project_list_body(\@list, $order);
4754         git_footer_html();
4755 }
4756
4757 sub git_forks {
4758         my $order = $input_params{'order'};
4759         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4760                 die_error(400, "Unknown order parameter");
4761         }
4762
4763         my @list = git_get_projects_list($project);
4764         if (!@list) {
4765                 die_error(404, "No forks found");
4766         }
4767
4768         git_header_html();
4769         git_print_page_nav('','');
4770         git_print_header_div('summary', "$project forks");
4771         git_project_list_body(\@list, $order);
4772         git_footer_html();
4773 }
4774
4775 sub git_project_index {
4776         my @projects = git_get_projects_list($project);
4777
4778         print $cgi->header(
4779                 -type => 'text/plain',
4780                 -charset => 'utf-8',
4781                 -content_disposition => 'inline; filename="index.aux"');
4782
4783         foreach my $pr (@projects) {
4784                 if (!exists $pr->{'owner'}) {
4785                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4786                 }
4787
4788                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4789                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4790                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4791                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4792                 $path  =~ s/ /\+/g;
4793                 $owner =~ s/ /\+/g;
4794
4795                 print "$path $owner\n";
4796         }
4797 }
4798
4799 sub git_summary {
4800         my $descr = git_get_project_description($project) || "none";
4801         my %co = parse_commit("HEAD");
4802         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4803         my $head = $co{'id'};
4804
4805         my $owner = git_get_project_owner($project);
4806
4807         my $refs = git_get_references();
4808         # These get_*_list functions return one more to allow us to see if
4809         # there are more ...
4810         my @taglist  = git_get_tags_list(16);
4811         my @headlist = git_get_heads_list(16);
4812         my @forklist;
4813         my $check_forks = gitweb_check_feature('forks');
4814
4815         if ($check_forks) {
4816                 @forklist = git_get_projects_list($project);
4817         }
4818
4819         git_header_html();
4820         git_print_page_nav('summary','', $head);
4821
4822         print "<div class=\"title\">&nbsp;</div>\n";
4823         print "<table class=\"projects_list\">\n" .
4824               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4825               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4826         if (defined $cd{'rfc2822'}) {
4827                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4828         }
4829
4830         # use per project git URL list in $projectroot/$project/cloneurl
4831         # or make project git URL from git base URL and project name
4832         my $url_tag = "URL";
4833         my @url_list = git_get_project_url_list($project);
4834         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4835         foreach my $git_url (@url_list) {
4836                 next unless $git_url;
4837                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4838                 $url_tag = "";
4839         }
4840
4841         # Tag cloud
4842         my $show_ctags = gitweb_check_feature('ctags');
4843         if ($show_ctags) {
4844                 my $ctags = git_get_project_ctags($project);
4845                 my $cloud = git_populate_project_tagcloud($ctags);
4846                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4847                 print "</td>\n<td>" unless %$ctags;
4848                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4849                 print "</td>\n<td>" if %$ctags;
4850                 print git_show_project_tagcloud($cloud, 48);
4851                 print "</td></tr>";
4852         }
4853
4854         print "</table>\n";
4855
4856         # If XSS prevention is on, we don't include README.html.
4857         # TODO: Allow a readme in some safe format.
4858         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4859                 print "<div class=\"title\">readme</div>\n" .
4860                       "<div class=\"readme\">\n";
4861                 insert_file("$projectroot/$project/README.html");
4862                 print "\n</div>\n"; # class="readme"
4863         }
4864
4865         # we need to request one more than 16 (0..15) to check if
4866         # those 16 are all
4867         my @commitlist = $head ? parse_commits($head, 17) : ();
4868         if (@commitlist) {
4869                 git_print_header_div('shortlog');
4870                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4871                                   $#commitlist <=  15 ? undef :
4872                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4873         }
4874
4875         if (@taglist) {
4876                 git_print_header_div('tags');
4877                 git_tags_body(\@taglist, 0, 15,
4878                               $#taglist <=  15 ? undef :
4879                               $cgi->a({-href => href(action=>"tags")}, "..."));
4880         }
4881
4882         if (@headlist) {
4883                 git_print_header_div('heads');
4884                 git_heads_body(\@headlist, $head, 0, 15,
4885                                $#headlist <= 15 ? undef :
4886                                $cgi->a({-href => href(action=>"heads")}, "..."));
4887         }
4888
4889         if (@forklist) {
4890                 git_print_header_div('forks');
4891                 git_project_list_body(\@forklist, 'age', 0, 15,
4892                                       $#forklist <= 15 ? undef :
4893                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4894                                       'no_header');
4895         }
4896
4897         git_footer_html();
4898 }
4899
4900 sub git_tag {
4901         my $head = git_get_head_hash($project);
4902         git_header_html();
4903         git_print_page_nav('','', $head,undef,$head);
4904         my %tag = parse_tag($hash);
4905
4906         if (! %tag) {
4907                 die_error(404, "Unknown tag object");
4908         }
4909
4910         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4911         print "<div class=\"title_text\">\n" .
4912               "<table class=\"object_header\">\n" .
4913               "<tr>\n" .
4914               "<td>object</td>\n" .
4915               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4916                                $tag{'object'}) . "</td>\n" .
4917               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4918                                               $tag{'type'}) . "</td>\n" .
4919               "</tr>\n";
4920         if (defined($tag{'author'})) {
4921                 git_print_authorship_rows(\%tag, 'author');
4922         }
4923         print "</table>\n\n" .
4924               "</div>\n";
4925         print "<div class=\"page_body\">";
4926         my $comment = $tag{'comment'};
4927         foreach my $line (@$comment) {
4928                 chomp $line;
4929                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4930         }
4931         print "</div>\n";
4932         git_footer_html();
4933 }
4934
4935 sub git_blame_common {
4936         my $format = shift || 'porcelain';
4937         if ($format eq 'porcelain' && $cgi->param('js')) {
4938                 $format = 'incremental';
4939                 $action = 'blame_incremental'; # for page title etc
4940         }
4941
4942         # permissions
4943         gitweb_check_feature('blame')
4944                 or die_error(403, "Blame view not allowed");
4945
4946         # error checking
4947         die_error(400, "No file name given") unless $file_name;
4948         $hash_base ||= git_get_head_hash($project);
4949         die_error(404, "Couldn't find base commit") unless $hash_base;
4950         my %co = parse_commit($hash_base)
4951                 or die_error(404, "Commit not found");
4952         my $ftype = "blob";
4953         if (!defined $hash) {
4954                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4955                         or die_error(404, "Error looking up file");
4956         } else {
4957                 $ftype = git_get_type($hash);
4958                 if ($ftype !~ "blob") {
4959                         die_error(400, "Object is not a blob");
4960                 }
4961         }
4962
4963         my $fd;
4964         if ($format eq 'incremental') {
4965                 # get file contents (as base)
4966                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
4967                         or die_error(500, "Open git-cat-file failed");
4968         } elsif ($format eq 'data') {
4969                 # run git-blame --incremental
4970                 open $fd, "-|", git_cmd(), "blame", "--incremental",
4971                         $hash_base, "--", $file_name
4972                         or die_error(500, "Open git-blame --incremental failed");
4973         } else {
4974                 # run git-blame --porcelain
4975                 open $fd, "-|", git_cmd(), "blame", '-p',
4976                         $hash_base, '--', $file_name
4977                         or die_error(500, "Open git-blame --porcelain failed");
4978         }
4979
4980         # incremental blame data returns early
4981         if ($format eq 'data') {
4982                 print $cgi->header(
4983                         -type=>"text/plain", -charset => "utf-8",
4984                         -status=> "200 OK");
4985                 local $| = 1; # output autoflush
4986                 print while <$fd>;
4987                 close $fd
4988                         or print "ERROR $!\n";
4989
4990                 print 'END';
4991                 if (defined $t0 && gitweb_check_feature('timed')) {
4992                         print ' '.
4993                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
4994                               ' '.$number_of_git_cmds;
4995                 }
4996                 print "\n";
4997
4998                 return;
4999         }
5000
5001         # page header
5002         git_header_html();
5003         my $formats_nav =
5004                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5005                         "blob") .
5006                 " | " .
5007                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5008                         "history") .
5009                 " | " .
5010                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5011                         "HEAD");
5012         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5013         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5014         git_print_page_path($file_name, $ftype, $hash_base);
5015
5016         # page body
5017         if ($format eq 'incremental') {
5018                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5019                       "This page requires JavaScript to run.\n Use ".
5020                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5021                               'this page').
5022                       " instead.\n".
5023                       "</b></center></div>\n</noscript>\n";
5024
5025                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5026         }
5027
5028         print qq!<div class="page_body">\n!;
5029         print qq!<div id="progress_info">... / ...</div>\n!
5030                 if ($format eq 'incremental');
5031         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5032               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5033               qq!<thead>\n!.
5034               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5035               qq!</thead>\n!.
5036               qq!<tbody>\n!;
5037
5038         my @rev_color = qw(light dark);
5039         my $num_colors = scalar(@rev_color);
5040         my $current_color = 0;
5041
5042         if ($format eq 'incremental') {
5043                 my $color_class = $rev_color[$current_color];
5044
5045                 #contents of a file
5046                 my $linenr = 0;
5047         LINE:
5048                 while (my $line = <$fd>) {
5049                         chomp $line;
5050                         $linenr++;
5051
5052                         print qq!<tr id="l$linenr" class="$color_class">!.
5053                               qq!<td class="sha1"><a href=""> </a></td>!.
5054                               qq!<td class="linenr">!.
5055                               qq!<a class="linenr" href="">$linenr</a></td>!;
5056                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5057                         print qq!</tr>\n!;
5058                 }
5059
5060         } else { # porcelain, i.e. ordinary blame
5061                 my %metainfo = (); # saves information about commits
5062
5063                 # blame data
5064         LINE:
5065                 while (my $line = <$fd>) {
5066                         chomp $line;
5067                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5068                         # no <lines in group> for subsequent lines in group of lines
5069                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5070                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5071                         if (!exists $metainfo{$full_rev}) {
5072                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5073                         }
5074                         my $meta = $metainfo{$full_rev};
5075                         my $data;
5076                         while ($data = <$fd>) {
5077                                 chomp $data;
5078                                 last if ($data =~ s/^\t//); # contents of line
5079                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5080                                         $meta->{$1} = $2 unless exists $meta->{$1};
5081                                 }
5082                                 if ($data =~ /^previous /) {
5083                                         $meta->{'nprevious'}++;
5084                                 }
5085                         }
5086                         my $short_rev = substr($full_rev, 0, 8);
5087                         my $author = $meta->{'author'};
5088                         my %date =
5089                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5090                         my $date = $date{'iso-tz'};
5091                         if ($group_size) {
5092                                 $current_color = ($current_color + 1) % $num_colors;
5093                         }
5094                         my $tr_class = $rev_color[$current_color];
5095                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5096                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5097                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5098                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5099                         if ($group_size) {
5100                                 print "<td class=\"sha1\"";
5101                                 print " title=\"". esc_html($author) . ", $date\"";
5102                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5103                                 print ">";
5104                                 print $cgi->a({-href => href(action=>"commit",
5105                                                              hash=>$full_rev,
5106                                                              file_name=>$file_name)},
5107                                               esc_html($short_rev));
5108                                 if ($group_size >= 2) {
5109                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5110                                         if (@author_initials) {
5111                                                 print "<br />" .
5112                                                       esc_html(join('', @author_initials));
5113                                                 #           or join('.', ...)
5114                                         }
5115                                 }
5116                                 print "</td>\n";
5117                         }
5118                         # 'previous' <sha1 of parent commit> <filename at commit>
5119                         if (exists $meta->{'previous'} &&
5120                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5121                                 $meta->{'parent'} = $1;
5122                                 $meta->{'file_parent'} = unquote($2);
5123                         }
5124                         my $linenr_commit =
5125                                 exists($meta->{'parent'}) ?
5126                                 $meta->{'parent'} : $full_rev;
5127                         my $linenr_filename =
5128                                 exists($meta->{'file_parent'}) ?
5129                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5130                         my $blamed = href(action => 'blame',
5131                                           file_name => $linenr_filename,
5132                                           hash_base => $linenr_commit);
5133                         print "<td class=\"linenr\">";
5134                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5135                                         -class => "linenr" },
5136                                       esc_html($lineno));
5137                         print "</td>";
5138                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5139                         print "</tr>\n";
5140                 } # end while
5141
5142         }
5143
5144         # footer
5145         print "</tbody>\n".
5146               "</table>\n"; # class="blame"
5147         print "</div>\n";   # class="blame_body"
5148         close $fd
5149                 or print "Reading blob failed\n";
5150
5151         git_footer_html();
5152 }
5153
5154 sub git_blame {
5155         git_blame_common();
5156 }
5157
5158 sub git_blame_incremental {
5159         git_blame_common('incremental');
5160 }
5161
5162 sub git_blame_data {
5163         git_blame_common('data');
5164 }
5165
5166 sub git_tags {
5167         my $head = git_get_head_hash($project);
5168         git_header_html();
5169         git_print_page_nav('','', $head,undef,$head);
5170         git_print_header_div('summary', $project);
5171
5172         my @tagslist = git_get_tags_list();
5173         if (@tagslist) {
5174                 git_tags_body(\@tagslist);
5175         }
5176         git_footer_html();
5177 }
5178
5179 sub git_heads {
5180         my $head = git_get_head_hash($project);
5181         git_header_html();
5182         git_print_page_nav('','', $head,undef,$head);
5183         git_print_header_div('summary', $project);
5184
5185         my @headslist = git_get_heads_list();
5186         if (@headslist) {
5187                 git_heads_body(\@headslist, $head);
5188         }
5189         git_footer_html();
5190 }
5191
5192 sub git_blob_plain {
5193         my $type = shift;
5194         my $expires;
5195
5196         if (!defined $hash) {
5197                 if (defined $file_name) {
5198                         my $base = $hash_base || git_get_head_hash($project);
5199                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5200                                 or die_error(404, "Cannot find file");
5201                 } else {
5202                         die_error(400, "No file name defined");
5203                 }
5204         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5205                 # blobs defined by non-textual hash id's can be cached
5206                 $expires = "+1d";
5207         }
5208
5209         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5210                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5211
5212         # content-type (can include charset)
5213         $type = blob_contenttype($fd, $file_name, $type);
5214
5215         # "save as" filename, even when no $file_name is given
5216         my $save_as = "$hash";
5217         if (defined $file_name) {
5218                 $save_as = $file_name;
5219         } elsif ($type =~ m/^text\//) {
5220                 $save_as .= '.txt';
5221         }
5222
5223         # With XSS prevention on, blobs of all types except a few known safe
5224         # ones are served with "Content-Disposition: attachment" to make sure
5225         # they don't run in our security domain.  For certain image types,
5226         # blob view writes an <img> tag referring to blob_plain view, and we
5227         # want to be sure not to break that by serving the image as an
5228         # attachment (though Firefox 3 doesn't seem to care).
5229         my $sandbox = $prevent_xss &&
5230                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5231
5232         print $cgi->header(
5233                 -type => $type,
5234                 -expires => $expires,
5235                 -content_disposition =>
5236                         ($sandbox ? 'attachment' : 'inline')
5237                         . '; filename="' . $save_as . '"');
5238         local $/ = undef;
5239         binmode STDOUT, ':raw';
5240         print <$fd>;
5241         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5242         close $fd;
5243 }
5244
5245 sub git_blob {
5246         my $expires;
5247
5248         if (!defined $hash) {
5249                 if (defined $file_name) {
5250                         my $base = $hash_base || git_get_head_hash($project);
5251                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5252                                 or die_error(404, "Cannot find file");
5253                 } else {
5254                         die_error(400, "No file name defined");
5255                 }
5256         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5257                 # blobs defined by non-textual hash id's can be cached
5258                 $expires = "+1d";
5259         }
5260
5261         my $have_blame = gitweb_check_feature('blame');
5262         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5263                 or die_error(500, "Couldn't cat $file_name, $hash");
5264         my $mimetype = blob_mimetype($fd, $file_name);
5265         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5266                 close $fd;
5267                 return git_blob_plain($mimetype);
5268         }
5269         # we can have blame only for text/* mimetype
5270         $have_blame &&= ($mimetype =~ m!^text/!);
5271
5272         git_header_html(undef, $expires);
5273         my $formats_nav = '';
5274         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5275                 if (defined $file_name) {
5276                         if ($have_blame) {
5277                                 $formats_nav .=
5278                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5279                                                 "blame") .
5280                                         " | ";
5281                         }
5282                         $formats_nav .=
5283                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5284                                         "history") .
5285                                 " | " .
5286                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5287                                         "raw") .
5288                                 " | " .
5289                                 $cgi->a({-href => href(action=>"blob",
5290                                                        hash_base=>"HEAD", file_name=>$file_name)},
5291                                         "HEAD");
5292                 } else {
5293                         $formats_nav .=
5294                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5295                                         "raw");
5296                 }
5297                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5298                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5299         } else {
5300                 print "<div class=\"page_nav\">\n" .
5301                       "<br/><br/></div>\n" .
5302                       "<div class=\"title\">$hash</div>\n";
5303         }
5304         git_print_page_path($file_name, "blob", $hash_base);
5305         print "<div class=\"page_body\">\n";
5306         if ($mimetype =~ m!^image/!) {
5307                 print qq!<img type="$mimetype"!;
5308                 if ($file_name) {
5309                         print qq! alt="$file_name" title="$file_name"!;
5310                 }
5311                 print qq! src="! .
5312                       href(action=>"blob_plain", hash=>$hash,
5313                            hash_base=>$hash_base, file_name=>$file_name) .
5314                       qq!" />\n!;
5315         } else {
5316                 my $nr;
5317                 while (my $line = <$fd>) {
5318                         chomp $line;
5319                         $nr++;
5320                         $line = untabify($line);
5321                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5322                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5323                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5324                 }
5325         }
5326         close $fd
5327                 or print "Reading blob failed.\n";
5328         print "</div>";
5329         git_footer_html();
5330 }
5331
5332 sub git_tree {
5333         if (!defined $hash_base) {
5334                 $hash_base = "HEAD";
5335         }
5336         if (!defined $hash) {
5337                 if (defined $file_name) {
5338                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5339                 } else {
5340                         $hash = $hash_base;
5341                 }
5342         }
5343         die_error(404, "No such tree") unless defined($hash);
5344
5345         my $show_sizes = gitweb_check_feature('show-sizes');
5346         my $have_blame = gitweb_check_feature('blame');
5347
5348         my @entries = ();
5349         {
5350                 local $/ = "\0";
5351                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5352                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5353                         or die_error(500, "Open git-ls-tree failed");
5354                 @entries = map { chomp; $_ } <$fd>;
5355                 close $fd
5356                         or die_error(404, "Reading tree failed");
5357         }
5358
5359         my $refs = git_get_references();
5360         my $ref = format_ref_marker($refs, $hash_base);
5361         git_header_html();
5362         my $basedir = '';
5363         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5364                 my @views_nav = ();
5365                 if (defined $file_name) {
5366                         push @views_nav,
5367                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5368                                         "history"),
5369                                 $cgi->a({-href => href(action=>"tree",
5370                                                        hash_base=>"HEAD", file_name=>$file_name)},
5371                                         "HEAD"),
5372                 }
5373                 my $snapshot_links = format_snapshot_links($hash);
5374                 if (defined $snapshot_links) {
5375                         # FIXME: Should be available when we have no hash base as well.
5376                         push @views_nav, $snapshot_links;
5377                 }
5378                 git_print_page_nav('tree','', $hash_base, undef, undef,
5379                                    join(' | ', @views_nav));
5380                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5381         } else {
5382                 undef $hash_base;
5383                 print "<div class=\"page_nav\">\n";
5384                 print "<br/><br/></div>\n";
5385                 print "<div class=\"title\">$hash</div>\n";
5386         }
5387         if (defined $file_name) {
5388                 $basedir = $file_name;
5389                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5390                         $basedir .= '/';
5391                 }
5392                 git_print_page_path($file_name, 'tree', $hash_base);
5393         }
5394         print "<div class=\"page_body\">\n";
5395         print "<table class=\"tree\">\n";
5396         my $alternate = 1;
5397         # '..' (top directory) link if possible
5398         if (defined $hash_base &&
5399             defined $file_name && $file_name =~ m![^/]+$!) {
5400                 if ($alternate) {
5401                         print "<tr class=\"dark\">\n";
5402                 } else {
5403                         print "<tr class=\"light\">\n";
5404                 }
5405                 $alternate ^= 1;
5406
5407                 my $up = $file_name;
5408                 $up =~ s!/?[^/]+$!!;
5409                 undef $up unless $up;
5410                 # based on git_print_tree_entry
5411                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5412                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5413                 print '<td class="list">';
5414                 print $cgi->a({-href => href(action=>"tree",
5415                                              hash_base=>$hash_base,
5416                                              file_name=>$up)},
5417                               "..");
5418                 print "</td>\n";
5419                 print "<td class=\"link\"></td>\n";
5420
5421                 print "</tr>\n";
5422         }
5423         foreach my $line (@entries) {
5424                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5425
5426                 if ($alternate) {
5427                         print "<tr class=\"dark\">\n";
5428                 } else {
5429                         print "<tr class=\"light\">\n";
5430                 }
5431                 $alternate ^= 1;
5432
5433                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5434
5435                 print "</tr>\n";
5436         }
5437         print "</table>\n" .
5438               "</div>";
5439         git_footer_html();
5440 }
5441
5442 sub snapshot_name {
5443         my ($project, $hash) = @_;
5444
5445         # path/to/project.git  -> project
5446         # path/to/project/.git -> project
5447         my $name = to_utf8($project);
5448         $name =~ s,([^/])/*\.git$,$1,;
5449         $name = basename($name);
5450         # sanitize name
5451         $name =~ s/[[:cntrl:]]/?/g;
5452
5453         my $ver = $hash;
5454         if ($hash =~ /^[0-9a-fA-F]+$/) {
5455                 # shorten SHA-1 hash
5456                 my $full_hash = git_get_full_hash($project, $hash);
5457                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5458                         $ver = git_get_short_hash($project, $hash);
5459                 }
5460         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5461                 # tags don't need shortened SHA-1 hash
5462                 $ver = $1;
5463         } else {
5464                 # branches and other need shortened SHA-1 hash
5465                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5466                         $ver = $1;
5467                 }
5468                 $ver .= '-' . git_get_short_hash($project, $hash);
5469         }
5470         # in case of hierarchical branch names
5471         $ver =~ s!/!.!g;
5472
5473         # name = project-version_string
5474         $name = "$name-$ver";
5475
5476         return wantarray ? ($name, $name) : $name;
5477 }
5478
5479 sub git_snapshot {
5480         my $format = $input_params{'snapshot_format'};
5481         if (!@snapshot_fmts) {
5482                 die_error(403, "Snapshots not allowed");
5483         }
5484         # default to first supported snapshot format
5485         $format ||= $snapshot_fmts[0];
5486         if ($format !~ m/^[a-z0-9]+$/) {
5487                 die_error(400, "Invalid snapshot format parameter");
5488         } elsif (!exists($known_snapshot_formats{$format})) {
5489                 die_error(400, "Unknown snapshot format");
5490         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5491                 die_error(403, "Snapshot format not allowed");
5492         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5493                 die_error(403, "Unsupported snapshot format");
5494         }
5495
5496         my $type = git_get_type("$hash^{}");
5497         if (!$type) {
5498                 die_error(404, 'Object does not exist');
5499         }  elsif ($type eq 'blob') {
5500                 die_error(400, 'Object is not a tree-ish');
5501         }
5502
5503         my ($name, $prefix) = snapshot_name($project, $hash);
5504         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5505         my $cmd = quote_command(
5506                 git_cmd(), 'archive',
5507                 "--format=$known_snapshot_formats{$format}{'format'}",
5508                 "--prefix=$prefix/", $hash);
5509         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5510                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5511         }
5512
5513         $filename =~ s/(["\\])/\\$1/g;
5514         print $cgi->header(
5515                 -type => $known_snapshot_formats{$format}{'type'},
5516                 -content_disposition => 'inline; filename="' . $filename . '"',
5517                 -status => '200 OK');
5518
5519         open my $fd, "-|", $cmd
5520                 or die_error(500, "Execute git-archive failed");
5521         binmode STDOUT, ':raw';
5522         print <$fd>;
5523         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5524         close $fd;
5525 }
5526
5527 sub git_log {
5528         my $head = git_get_head_hash($project);
5529         if (!defined $hash) {
5530                 $hash = $head;
5531         }
5532         if (!defined $page) {
5533                 $page = 0;
5534         }
5535         my $refs = git_get_references();
5536
5537         my @commitlist = parse_commits($hash, 101, (100 * $page));
5538
5539         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5540         my $next_link;
5541         if ($#commitlist >= 100) {
5542                 $next_link =
5543                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5544                                  -accesskey => "n", -title => "Alt-n"}, "next");
5545         }
5546         my ($patch_max) = gitweb_get_feature('patches');
5547         if ($patch_max) {
5548                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5549                         $paging_nav .= " &sdot; " .
5550                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5551                                         "patches");
5552                 }
5553         }
5554
5555         git_header_html();
5556         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5557
5558         if (!@commitlist) {
5559                 my %co = parse_commit($hash);
5560
5561                 git_print_header_div('summary', $project);
5562                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5563         }
5564
5565         git_log_body(\@commitlist, 0, 99, $refs, $next_link);
5566
5567         git_footer_html();
5568 }
5569
5570 sub git_commit {
5571         $hash ||= $hash_base || "HEAD";
5572         my %co = parse_commit($hash)
5573             or die_error(404, "Unknown commit object");
5574
5575         my $parent  = $co{'parent'};
5576         my $parents = $co{'parents'}; # listref
5577
5578         # we need to prepare $formats_nav before any parameter munging
5579         my $formats_nav;
5580         if (!defined $parent) {
5581                 # --root commitdiff
5582                 $formats_nav .= '(initial)';
5583         } elsif (@$parents == 1) {
5584                 # single parent commit
5585                 $formats_nav .=
5586                         '(parent: ' .
5587                         $cgi->a({-href => href(action=>"commit",
5588                                                hash=>$parent)},
5589                                 esc_html(substr($parent, 0, 7))) .
5590                         ')';
5591         } else {
5592                 # merge commit
5593                 $formats_nav .=
5594                         '(merge: ' .
5595                         join(' ', map {
5596                                 $cgi->a({-href => href(action=>"commit",
5597                                                        hash=>$_)},
5598                                         esc_html(substr($_, 0, 7)));
5599                         } @$parents ) .
5600                         ')';
5601         }
5602         if (gitweb_check_feature('patches') && @$parents <= 1) {
5603                 $formats_nav .= " | " .
5604                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5605                                 "patch");
5606         }
5607
5608         if (!defined $parent) {
5609                 $parent = "--root";
5610         }
5611         my @difftree;
5612         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5613                 @diff_opts,
5614                 (@$parents <= 1 ? $parent : '-c'),
5615                 $hash, "--"
5616                 or die_error(500, "Open git-diff-tree failed");
5617         @difftree = map { chomp; $_ } <$fd>;
5618         close $fd or die_error(404, "Reading git-diff-tree failed");
5619
5620         # non-textual hash id's can be cached
5621         my $expires;
5622         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5623                 $expires = "+1d";
5624         }
5625         my $refs = git_get_references();
5626         my $ref = format_ref_marker($refs, $co{'id'});
5627
5628         git_header_html(undef, $expires);
5629         git_print_page_nav('commit', '',
5630                            $hash, $co{'tree'}, $hash,
5631                            $formats_nav);
5632
5633         if (defined $co{'parent'}) {
5634                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5635         } else {
5636                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5637         }
5638         print "<div class=\"title_text\">\n" .
5639               "<table class=\"object_header\">\n";
5640         git_print_authorship_rows(\%co);
5641         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5642         print "<tr>" .
5643               "<td>tree</td>" .
5644               "<td class=\"sha1\">" .
5645               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5646                        class => "list"}, $co{'tree'}) .
5647               "</td>" .
5648               "<td class=\"link\">" .
5649               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5650                       "tree");
5651         my $snapshot_links = format_snapshot_links($hash);
5652         if (defined $snapshot_links) {
5653                 print " | " . $snapshot_links;
5654         }
5655         print "</td>" .
5656               "</tr>\n";
5657
5658         foreach my $par (@$parents) {
5659                 print "<tr>" .
5660                       "<td>parent</td>" .
5661                       "<td class=\"sha1\">" .
5662                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5663                                class => "list"}, $par) .
5664                       "</td>" .
5665                       "<td class=\"link\">" .
5666                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5667                       " | " .
5668                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5669                       "</td>" .
5670                       "</tr>\n";
5671         }
5672         print "</table>".
5673               "</div>\n";
5674
5675         print "<div class=\"page_body\">\n";
5676         git_print_log($co{'comment'});
5677         print "</div>\n";
5678
5679         git_difftree_body(\@difftree, $hash, @$parents);
5680
5681         git_footer_html();
5682 }
5683
5684 sub git_object {
5685         # object is defined by:
5686         # - hash or hash_base alone
5687         # - hash_base and file_name
5688         my $type;
5689
5690         # - hash or hash_base alone
5691         if ($hash || ($hash_base && !defined $file_name)) {
5692                 my $object_id = $hash || $hash_base;
5693
5694                 open my $fd, "-|", quote_command(
5695                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5696                         or die_error(404, "Object does not exist");
5697                 $type = <$fd>;
5698                 chomp $type;
5699                 close $fd
5700                         or die_error(404, "Object does not exist");
5701
5702         # - hash_base and file_name
5703         } elsif ($hash_base && defined $file_name) {
5704                 $file_name =~ s,/+$,,;
5705
5706                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5707                         or die_error(404, "Base object does not exist");
5708
5709                 # here errors should not hapen
5710                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5711                         or die_error(500, "Open git-ls-tree failed");
5712                 my $line = <$fd>;
5713                 close $fd;
5714
5715                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5716                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5717                         die_error(404, "File or directory for given base does not exist");
5718                 }
5719                 $type = $2;
5720                 $hash = $3;
5721         } else {
5722                 die_error(400, "Not enough information to find object");
5723         }
5724
5725         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5726                                           hash=>$hash, hash_base=>$hash_base,
5727                                           file_name=>$file_name),
5728                              -status => '302 Found');
5729 }
5730
5731 sub git_blobdiff {
5732         my $format = shift || 'html';
5733
5734         my $fd;
5735         my @difftree;
5736         my %diffinfo;
5737         my $expires;
5738
5739         # preparing $fd and %diffinfo for git_patchset_body
5740         # new style URI
5741         if (defined $hash_base && defined $hash_parent_base) {
5742                 if (defined $file_name) {
5743                         # read raw output
5744                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5745                                 $hash_parent_base, $hash_base,
5746                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5747                                 or die_error(500, "Open git-diff-tree failed");
5748                         @difftree = map { chomp; $_ } <$fd>;
5749                         close $fd
5750                                 or die_error(404, "Reading git-diff-tree failed");
5751                         @difftree
5752                                 or die_error(404, "Blob diff not found");
5753
5754                 } elsif (defined $hash &&
5755                          $hash =~ /[0-9a-fA-F]{40}/) {
5756                         # try to find filename from $hash
5757
5758                         # read filtered raw output
5759                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5760                                 $hash_parent_base, $hash_base, "--"
5761                                 or die_error(500, "Open git-diff-tree failed");
5762                         @difftree =
5763                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5764                                 # $hash == to_id
5765                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5766                                 map { chomp; $_ } <$fd>;
5767                         close $fd
5768                                 or die_error(404, "Reading git-diff-tree failed");
5769                         @difftree
5770                                 or die_error(404, "Blob diff not found");
5771
5772                 } else {
5773                         die_error(400, "Missing one of the blob diff parameters");
5774                 }
5775
5776                 if (@difftree > 1) {
5777                         die_error(400, "Ambiguous blob diff specification");
5778                 }
5779
5780                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5781                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5782                 $file_name   ||= $diffinfo{'to_file'};
5783
5784                 $hash_parent ||= $diffinfo{'from_id'};
5785                 $hash        ||= $diffinfo{'to_id'};
5786
5787                 # non-textual hash id's can be cached
5788                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5789                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5790                         $expires = '+1d';
5791                 }
5792
5793                 # open patch output
5794                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5795                         '-p', ($format eq 'html' ? "--full-index" : ()),
5796                         $hash_parent_base, $hash_base,
5797                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5798                         or die_error(500, "Open git-diff-tree failed");
5799         }
5800
5801         # old/legacy style URI -- not generated anymore since 1.4.3.
5802         if (!%diffinfo) {
5803                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5804         }
5805
5806         # header
5807         if ($format eq 'html') {
5808                 my $formats_nav =
5809                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5810                                 "raw");
5811                 git_header_html(undef, $expires);
5812                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5813                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5814                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5815                 } else {
5816                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5817                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5818                 }
5819                 if (defined $file_name) {
5820                         git_print_page_path($file_name, "blob", $hash_base);
5821                 } else {
5822                         print "<div class=\"page_path\"></div>\n";
5823                 }
5824
5825         } elsif ($format eq 'plain') {
5826                 print $cgi->header(
5827                         -type => 'text/plain',
5828                         -charset => 'utf-8',
5829                         -expires => $expires,
5830                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5831
5832                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5833
5834         } else {
5835                 die_error(400, "Unknown blobdiff format");
5836         }
5837
5838         # patch
5839         if ($format eq 'html') {
5840                 print "<div class=\"page_body\">\n";
5841
5842                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5843                 close $fd;
5844
5845                 print "</div>\n"; # class="page_body"
5846                 git_footer_html();
5847
5848         } else {
5849                 while (my $line = <$fd>) {
5850                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5851                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5852
5853                         print $line;
5854
5855                         last if $line =~ m!^\+\+\+!;
5856                 }
5857                 local $/ = undef;
5858                 print <$fd>;
5859                 close $fd;
5860         }
5861 }
5862
5863 sub git_blobdiff_plain {
5864         git_blobdiff('plain');
5865 }
5866
5867 sub git_commitdiff {
5868         my %params = @_;
5869         my $format = $params{-format} || 'html';
5870
5871         my ($patch_max) = gitweb_get_feature('patches');
5872         if ($format eq 'patch') {
5873                 die_error(403, "Patch view not allowed") unless $patch_max;
5874         }
5875
5876         $hash ||= $hash_base || "HEAD";
5877         my %co = parse_commit($hash)
5878             or die_error(404, "Unknown commit object");
5879
5880         # choose format for commitdiff for merge
5881         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5882                 $hash_parent = '--cc';
5883         }
5884         # we need to prepare $formats_nav before almost any parameter munging
5885         my $formats_nav;
5886         if ($format eq 'html') {
5887                 $formats_nav =
5888                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5889                                 "raw");
5890                 if ($patch_max && @{$co{'parents'}} <= 1) {
5891                         $formats_nav .= " | " .
5892                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5893                                         "patch");
5894                 }
5895
5896                 if (defined $hash_parent &&
5897                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5898                         # commitdiff with two commits given
5899                         my $hash_parent_short = $hash_parent;
5900                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5901                                 $hash_parent_short = substr($hash_parent, 0, 7);
5902                         }
5903                         $formats_nav .=
5904                                 ' (from';
5905                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5906                                 if ($co{'parents'}[$i] eq $hash_parent) {
5907                                         $formats_nav .= ' parent ' . ($i+1);
5908                                         last;
5909                                 }
5910                         }
5911                         $formats_nav .= ': ' .
5912                                 $cgi->a({-href => href(action=>"commitdiff",
5913                                                        hash=>$hash_parent)},
5914                                         esc_html($hash_parent_short)) .
5915                                 ')';
5916                 } elsif (!$co{'parent'}) {
5917                         # --root commitdiff
5918                         $formats_nav .= ' (initial)';
5919                 } elsif (scalar @{$co{'parents'}} == 1) {
5920                         # single parent commit
5921                         $formats_nav .=
5922                                 ' (parent: ' .
5923                                 $cgi->a({-href => href(action=>"commitdiff",
5924                                                        hash=>$co{'parent'})},
5925                                         esc_html(substr($co{'parent'}, 0, 7))) .
5926                                 ')';
5927                 } else {
5928                         # merge commit
5929                         if ($hash_parent eq '--cc') {
5930                                 $formats_nav .= ' | ' .
5931                                         $cgi->a({-href => href(action=>"commitdiff",
5932                                                                hash=>$hash, hash_parent=>'-c')},
5933                                                 'combined');
5934                         } else { # $hash_parent eq '-c'
5935                                 $formats_nav .= ' | ' .
5936                                         $cgi->a({-href => href(action=>"commitdiff",
5937                                                                hash=>$hash, hash_parent=>'--cc')},
5938                                                 'compact');
5939                         }
5940                         $formats_nav .=
5941                                 ' (merge: ' .
5942                                 join(' ', map {
5943                                         $cgi->a({-href => href(action=>"commitdiff",
5944                                                                hash=>$_)},
5945                                                 esc_html(substr($_, 0, 7)));
5946                                 } @{$co{'parents'}} ) .
5947                                 ')';
5948                 }
5949         }
5950
5951         my $hash_parent_param = $hash_parent;
5952         if (!defined $hash_parent_param) {
5953                 # --cc for multiple parents, --root for parentless
5954                 $hash_parent_param =
5955                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5956         }
5957
5958         # read commitdiff
5959         my $fd;
5960         my @difftree;
5961         if ($format eq 'html') {
5962                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5963                         "--no-commit-id", "--patch-with-raw", "--full-index",
5964                         $hash_parent_param, $hash, "--"
5965                         or die_error(500, "Open git-diff-tree failed");
5966
5967                 while (my $line = <$fd>) {
5968                         chomp $line;
5969                         # empty line ends raw part of diff-tree output
5970                         last unless $line;
5971                         push @difftree, scalar parse_difftree_raw_line($line);
5972                 }
5973
5974         } elsif ($format eq 'plain') {
5975                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5976                         '-p', $hash_parent_param, $hash, "--"
5977                         or die_error(500, "Open git-diff-tree failed");
5978         } elsif ($format eq 'patch') {
5979                 # For commit ranges, we limit the output to the number of
5980                 # patches specified in the 'patches' feature.
5981                 # For single commits, we limit the output to a single patch,
5982                 # diverging from the git-format-patch default.
5983                 my @commit_spec = ();
5984                 if ($hash_parent) {
5985                         if ($patch_max > 0) {
5986                                 push @commit_spec, "-$patch_max";
5987                         }
5988                         push @commit_spec, '-n', "$hash_parent..$hash";
5989                 } else {
5990                         if ($params{-single}) {
5991                                 push @commit_spec, '-1';
5992                         } else {
5993                                 if ($patch_max > 0) {
5994                                         push @commit_spec, "-$patch_max";
5995                                 }
5996                                 push @commit_spec, "-n";
5997                         }
5998                         push @commit_spec, '--root', $hash;
5999                 }
6000                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6001                         '--stdout', @commit_spec
6002                         or die_error(500, "Open git-format-patch failed");
6003         } else {
6004                 die_error(400, "Unknown commitdiff format");
6005         }
6006
6007         # non-textual hash id's can be cached
6008         my $expires;
6009         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6010                 $expires = "+1d";
6011         }
6012
6013         # write commit message
6014         if ($format eq 'html') {
6015                 my $refs = git_get_references();
6016                 my $ref = format_ref_marker($refs, $co{'id'});
6017
6018                 git_header_html(undef, $expires);
6019                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6020                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6021                 print "<div class=\"title_text\">\n" .
6022                       "<table class=\"object_header\">\n";
6023                 git_print_authorship_rows(\%co);
6024                 print "</table>".
6025                       "</div>\n";
6026                 print "<div class=\"page_body\">\n";
6027                 if (@{$co{'comment'}} > 1) {
6028                         print "<div class=\"log\">\n";
6029                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6030                         print "</div>\n"; # class="log"
6031                 }
6032
6033         } elsif ($format eq 'plain') {
6034                 my $refs = git_get_references("tags");
6035                 my $tagname = git_get_rev_name_tags($hash);
6036                 my $filename = basename($project) . "-$hash.patch";
6037
6038                 print $cgi->header(
6039                         -type => 'text/plain',
6040                         -charset => 'utf-8',
6041                         -expires => $expires,
6042                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6043                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6044                 print "From: " . to_utf8($co{'author'}) . "\n";
6045                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6046                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6047
6048                 print "X-Git-Tag: $tagname\n" if $tagname;
6049                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6050
6051                 foreach my $line (@{$co{'comment'}}) {
6052                         print to_utf8($line) . "\n";
6053                 }
6054                 print "---\n\n";
6055         } elsif ($format eq 'patch') {
6056                 my $filename = basename($project) . "-$hash.patch";
6057
6058                 print $cgi->header(
6059                         -type => 'text/plain',
6060                         -charset => 'utf-8',
6061                         -expires => $expires,
6062                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6063         }
6064
6065         # write patch
6066         if ($format eq 'html') {
6067                 my $use_parents = !defined $hash_parent ||
6068                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6069                 git_difftree_body(\@difftree, $hash,
6070                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6071                 print "<br/>\n";
6072
6073                 git_patchset_body($fd, \@difftree, $hash,
6074                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6075                 close $fd;
6076                 print "</div>\n"; # class="page_body"
6077                 git_footer_html();
6078
6079         } elsif ($format eq 'plain') {
6080                 local $/ = undef;
6081                 print <$fd>;
6082                 close $fd
6083                         or print "Reading git-diff-tree failed\n";
6084         } elsif ($format eq 'patch') {
6085                 local $/ = undef;
6086                 print <$fd>;
6087                 close $fd
6088                         or print "Reading git-format-patch failed\n";
6089         }
6090 }
6091
6092 sub git_commitdiff_plain {
6093         git_commitdiff(-format => 'plain');
6094 }
6095
6096 # format-patch-style patches
6097 sub git_patch {
6098         git_commitdiff(-format => 'patch', -single => 1);
6099 }
6100
6101 sub git_patches {
6102         git_commitdiff(-format => 'patch');
6103 }
6104
6105 sub git_history {
6106         if (!defined $hash_base) {
6107                 $hash_base = git_get_head_hash($project);
6108         }
6109         if (!defined $page) {
6110                 $page = 0;
6111         }
6112         my $ftype;
6113         my %co = parse_commit($hash_base)
6114             or die_error(404, "Unknown commit object");
6115
6116         my $refs = git_get_references();
6117         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
6118
6119         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
6120                                        $file_name, "--full-history")
6121             or die_error(404, "No such file or directory on given branch");
6122
6123         if (!defined $hash && defined $file_name) {
6124                 # some commits could have deleted file in question,
6125                 # and not have it in tree, but one of them has to have it
6126                 for (my $i = 0; $i <= @commitlist; $i++) {
6127                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6128                         last if defined $hash;
6129                 }
6130         }
6131         if (defined $hash) {
6132                 $ftype = git_get_type($hash);
6133         }
6134         if (!defined $ftype) {
6135                 die_error(500, "Unknown type of object");
6136         }
6137
6138         my $paging_nav = '';
6139         if ($page > 0) {
6140                 $paging_nav .=
6141                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
6142                                                file_name=>$file_name)},
6143                                 "first");
6144                 $paging_nav .= " &sdot; " .
6145                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6146                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6147         } else {
6148                 $paging_nav .= "first";
6149                 $paging_nav .= " &sdot; prev";
6150         }
6151         my $next_link = '';
6152         if ($#commitlist >= 100) {
6153                 $next_link =
6154                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6155                                  -accesskey => "n", -title => "Alt-n"}, "next");
6156                 $paging_nav .= " &sdot; $next_link";
6157         } else {
6158                 $paging_nav .= " &sdot; next";
6159         }
6160
6161         git_header_html();
6162         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6163         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6164         git_print_page_path($file_name, $ftype, $hash_base);
6165
6166         git_history_body(\@commitlist, 0, 99,
6167                          $refs, $hash_base, $ftype, $next_link);
6168
6169         git_footer_html();
6170 }
6171
6172 sub git_search {
6173         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6174         if (!defined $searchtext) {
6175                 die_error(400, "Text field is empty");
6176         }
6177         if (!defined $hash) {
6178                 $hash = git_get_head_hash($project);
6179         }
6180         my %co = parse_commit($hash);
6181         if (!%co) {
6182                 die_error(404, "Unknown commit object");
6183         }
6184         if (!defined $page) {
6185                 $page = 0;
6186         }
6187
6188         $searchtype ||= 'commit';
6189         if ($searchtype eq 'pickaxe') {
6190                 # pickaxe may take all resources of your box and run for several minutes
6191                 # with every query - so decide by yourself how public you make this feature
6192                 gitweb_check_feature('pickaxe')
6193                     or die_error(403, "Pickaxe is disabled");
6194         }
6195         if ($searchtype eq 'grep') {
6196                 gitweb_check_feature('grep')[0]
6197                     or die_error(403, "Grep is disabled");
6198         }
6199
6200         git_header_html();
6201
6202         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6203                 my $greptype;
6204                 if ($searchtype eq 'commit') {
6205                         $greptype = "--grep=";
6206                 } elsif ($searchtype eq 'author') {
6207                         $greptype = "--author=";
6208                 } elsif ($searchtype eq 'committer') {
6209                         $greptype = "--committer=";
6210                 }
6211                 $greptype .= $searchtext;
6212                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6213                                                $greptype, '--regexp-ignore-case',
6214                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6215
6216                 my $paging_nav = '';
6217                 if ($page > 0) {
6218                         $paging_nav .=
6219                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6220                                                        searchtext=>$searchtext,
6221                                                        searchtype=>$searchtype)},
6222                                         "first");
6223                         $paging_nav .= " &sdot; " .
6224                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6225                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6226                 } else {
6227                         $paging_nav .= "first";
6228                         $paging_nav .= " &sdot; prev";
6229                 }
6230                 my $next_link = '';
6231                 if ($#commitlist >= 100) {
6232                         $next_link =
6233                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6234                                          -accesskey => "n", -title => "Alt-n"}, "next");
6235                         $paging_nav .= " &sdot; $next_link";
6236                 } else {
6237                         $paging_nav .= " &sdot; next";
6238                 }
6239
6240                 if ($#commitlist >= 100) {
6241                 }
6242
6243                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6244                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6245                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6246         }
6247
6248         if ($searchtype eq 'pickaxe') {
6249                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6250                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6251
6252                 print "<table class=\"pickaxe search\">\n";
6253                 my $alternate = 1;
6254                 local $/ = "\n";
6255                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6256                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6257                         ($search_use_regexp ? '--pickaxe-regex' : ());
6258                 undef %co;
6259                 my @files;
6260                 while (my $line = <$fd>) {
6261                         chomp $line;
6262                         next unless $line;
6263
6264                         my %set = parse_difftree_raw_line($line);
6265                         if (defined $set{'commit'}) {
6266                                 # finish previous commit
6267                                 if (%co) {
6268                                         print "</td>\n" .
6269                                               "<td class=\"link\">" .
6270                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6271                                               " | " .
6272                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6273                                         print "</td>\n" .
6274                                               "</tr>\n";
6275                                 }
6276
6277                                 if ($alternate) {
6278                                         print "<tr class=\"dark\">\n";
6279                                 } else {
6280                                         print "<tr class=\"light\">\n";
6281                                 }
6282                                 $alternate ^= 1;
6283                                 %co = parse_commit($set{'commit'});
6284                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6285                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6286                                       "<td><i>$author</i></td>\n" .
6287                                       "<td>" .
6288                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6289                                               -class => "list subject"},
6290                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6291                         } elsif (defined $set{'to_id'}) {
6292                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6293
6294                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6295                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6296                                               -class => "list"},
6297                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6298                                       "<br/>\n";
6299                         }
6300                 }
6301                 close $fd;
6302
6303                 # finish last commit (warning: repetition!)
6304                 if (%co) {
6305                         print "</td>\n" .
6306                               "<td class=\"link\">" .
6307                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6308                               " | " .
6309                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6310                         print "</td>\n" .
6311                               "</tr>\n";
6312                 }
6313
6314                 print "</table>\n";
6315         }
6316
6317         if ($searchtype eq 'grep') {
6318                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6319                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6320
6321                 print "<table class=\"grep_search\">\n";
6322                 my $alternate = 1;
6323                 my $matches = 0;
6324                 local $/ = "\n";
6325                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6326                         $search_use_regexp ? ('-E', '-i') : '-F',
6327                         $searchtext, $co{'tree'};
6328                 my $lastfile = '';
6329                 while (my $line = <$fd>) {
6330                         chomp $line;
6331                         my ($file, $lno, $ltext, $binary);
6332                         last if ($matches++ > 1000);
6333                         if ($line =~ /^Binary file (.+) matches$/) {
6334                                 $file = $1;
6335                                 $binary = 1;
6336                         } else {
6337                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6338                         }
6339                         if ($file ne $lastfile) {
6340                                 $lastfile and print "</td></tr>\n";
6341                                 if ($alternate++) {
6342                                         print "<tr class=\"dark\">\n";
6343                                 } else {
6344                                         print "<tr class=\"light\">\n";
6345                                 }
6346                                 print "<td class=\"list\">".
6347                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6348                                                                file_name=>"$file"),
6349                                                 -class => "list"}, esc_path($file));
6350                                 print "</td><td>\n";
6351                                 $lastfile = $file;
6352                         }
6353                         if ($binary) {
6354                                 print "<div class=\"binary\">Binary file</div>\n";
6355                         } else {
6356                                 $ltext = untabify($ltext);
6357                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6358                                         $ltext = esc_html($1, -nbsp=>1);
6359                                         $ltext .= '<span class="match">';
6360                                         $ltext .= esc_html($2, -nbsp=>1);
6361                                         $ltext .= '</span>';
6362                                         $ltext .= esc_html($3, -nbsp=>1);
6363                                 } else {
6364                                         $ltext = esc_html($ltext, -nbsp=>1);
6365                                 }
6366                                 print "<div class=\"pre\">" .
6367                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6368                                                                file_name=>"$file").'#l'.$lno,
6369                                                 -class => "linenr"}, sprintf('%4i', $lno))
6370                                         . ' ' .  $ltext . "</div>\n";
6371                         }
6372                 }
6373                 if ($lastfile) {
6374                         print "</td></tr>\n";
6375                         if ($matches > 1000) {
6376                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6377                         }
6378                 } else {
6379                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6380                 }
6381                 close $fd;
6382
6383                 print "</table>\n";
6384         }
6385         git_footer_html();
6386 }
6387
6388 sub git_search_help {
6389         git_header_html();
6390         git_print_page_nav('','', $hash,$hash,$hash);
6391         print <<EOT;
6392 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6393 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6394 the pattern entered is recognized as the POSIX extended
6395 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6396 insensitive).</p>
6397 <dl>
6398 <dt><b>commit</b></dt>
6399 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6400 EOT
6401         my $have_grep = gitweb_check_feature('grep');
6402         if ($have_grep) {
6403                 print <<EOT;
6404 <dt><b>grep</b></dt>
6405 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6406     a different one) are searched for the given pattern. On large trees, this search can take
6407 a while and put some strain on the server, so please use it with some consideration. Note that
6408 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6409 case-sensitive.</dd>
6410 EOT
6411         }
6412         print <<EOT;
6413 <dt><b>author</b></dt>
6414 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6415 <dt><b>committer</b></dt>
6416 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6417 EOT
6418         my $have_pickaxe = gitweb_check_feature('pickaxe');
6419         if ($have_pickaxe) {
6420                 print <<EOT;
6421 <dt><b>pickaxe</b></dt>
6422 <dd>All commits that caused the string to appear or disappear from any file (changes that
6423 added, removed or "modified" the string) will be listed. This search can take a while and
6424 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6425 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6426 EOT
6427         }
6428         print "</dl>\n";
6429         git_footer_html();
6430 }
6431
6432 sub git_shortlog {
6433         my $head = git_get_head_hash($project);
6434         if (!defined $hash) {
6435                 $hash = $head;
6436         }
6437         if (!defined $page) {
6438                 $page = 0;
6439         }
6440         my $refs = git_get_references();
6441
6442         my $commit_hash = $hash;
6443         if (defined $hash_parent) {
6444                 $commit_hash = "$hash_parent..$hash";
6445         }
6446         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6447
6448         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6449         my $next_link = '';
6450         if ($#commitlist >= 100) {
6451                 $next_link =
6452                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6453                                  -accesskey => "n", -title => "Alt-n"}, "next");
6454         }
6455         my $patch_max = gitweb_check_feature('patches');
6456         if ($patch_max) {
6457                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6458                         $paging_nav .= " &sdot; " .
6459                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6460                                         "patches");
6461                 }
6462         }
6463
6464         git_header_html();
6465         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6466         git_print_header_div('summary', $project);
6467
6468         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6469
6470         git_footer_html();
6471 }
6472
6473 ## ......................................................................
6474 ## feeds (RSS, Atom; OPML)
6475
6476 sub git_feed {
6477         my $format = shift || 'atom';
6478         my $have_blame = gitweb_check_feature('blame');
6479
6480         # Atom: http://www.atomenabled.org/developers/syndication/
6481         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6482         if ($format ne 'rss' && $format ne 'atom') {
6483                 die_error(400, "Unknown web feed format");
6484         }
6485
6486         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6487         my $head = $hash || 'HEAD';
6488         my @commitlist = parse_commits($head, 150, 0, $file_name);
6489
6490         my %latest_commit;
6491         my %latest_date;
6492         my $content_type = "application/$format+xml";
6493         if (defined $cgi->http('HTTP_ACCEPT') &&
6494                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6495                 # browser (feed reader) prefers text/xml
6496                 $content_type = 'text/xml';
6497         }
6498         if (defined($commitlist[0])) {
6499                 %latest_commit = %{$commitlist[0]};
6500                 my $latest_epoch = $latest_commit{'committer_epoch'};
6501                 %latest_date   = parse_date($latest_epoch);
6502                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6503                 if (defined $if_modified) {
6504                         my $since;
6505                         if (eval { require HTTP::Date; 1; }) {
6506                                 $since = HTTP::Date::str2time($if_modified);
6507                         } elsif (eval { require Time::ParseDate; 1; }) {
6508                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6509                         }
6510                         if (defined $since && $latest_epoch <= $since) {
6511                                 print $cgi->header(
6512                                         -type => $content_type,
6513                                         -charset => 'utf-8',
6514                                         -last_modified => $latest_date{'rfc2822'},
6515                                         -status => '304 Not Modified');
6516                                 return;
6517                         }
6518                 }
6519                 print $cgi->header(
6520                         -type => $content_type,
6521                         -charset => 'utf-8',
6522                         -last_modified => $latest_date{'rfc2822'});
6523         } else {
6524                 print $cgi->header(
6525                         -type => $content_type,
6526                         -charset => 'utf-8');
6527         }
6528
6529         # Optimization: skip generating the body if client asks only
6530         # for Last-Modified date.
6531         return if ($cgi->request_method() eq 'HEAD');
6532
6533         # header variables
6534         my $title = "$site_name - $project/$action";
6535         my $feed_type = 'log';
6536         if (defined $hash) {
6537                 $title .= " - '$hash'";
6538                 $feed_type = 'branch log';
6539                 if (defined $file_name) {
6540                         $title .= " :: $file_name";
6541                         $feed_type = 'history';
6542                 }
6543         } elsif (defined $file_name) {
6544                 $title .= " - $file_name";
6545                 $feed_type = 'history';
6546         }
6547         $title .= " $feed_type";
6548         my $descr = git_get_project_description($project);
6549         if (defined $descr) {
6550                 $descr = esc_html($descr);
6551         } else {
6552                 $descr = "$project " .
6553                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6554                          " feed";
6555         }
6556         my $owner = git_get_project_owner($project);
6557         $owner = esc_html($owner);
6558
6559         #header
6560         my $alt_url;
6561         if (defined $file_name) {
6562                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6563         } elsif (defined $hash) {
6564                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6565         } else {
6566                 $alt_url = href(-full=>1, action=>"summary");
6567         }
6568         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6569         if ($format eq 'rss') {
6570                 print <<XML;
6571 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6572 <channel>
6573 XML
6574                 print "<title>$title</title>\n" .
6575                       "<link>$alt_url</link>\n" .
6576                       "<description>$descr</description>\n" .
6577                       "<language>en</language>\n" .
6578                       # project owner is responsible for 'editorial' content
6579                       "<managingEditor>$owner</managingEditor>\n";
6580                 if (defined $logo || defined $favicon) {
6581                         # prefer the logo to the favicon, since RSS
6582                         # doesn't allow both
6583                         my $img = esc_url($logo || $favicon);
6584                         print "<image>\n" .
6585                               "<url>$img</url>\n" .
6586                               "<title>$title</title>\n" .
6587                               "<link>$alt_url</link>\n" .
6588                               "</image>\n";
6589                 }
6590                 if (%latest_date) {
6591                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6592                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6593                 }
6594                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6595         } elsif ($format eq 'atom') {
6596                 print <<XML;
6597 <feed xmlns="http://www.w3.org/2005/Atom">
6598 XML
6599                 print "<title>$title</title>\n" .
6600                       "<subtitle>$descr</subtitle>\n" .
6601                       '<link rel="alternate" type="text/html" href="' .
6602                       $alt_url . '" />' . "\n" .
6603                       '<link rel="self" type="' . $content_type . '" href="' .
6604                       $cgi->self_url() . '" />' . "\n" .
6605                       "<id>" . href(-full=>1) . "</id>\n" .
6606                       # use project owner for feed author
6607                       "<author><name>$owner</name></author>\n";
6608                 if (defined $favicon) {
6609                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6610                 }
6611                 if (defined $logo_url) {
6612                         # not twice as wide as tall: 72 x 27 pixels
6613                         print "<logo>" . esc_url($logo) . "</logo>\n";
6614                 }
6615                 if (! %latest_date) {
6616                         # dummy date to keep the feed valid until commits trickle in:
6617                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6618                 } else {
6619                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6620                 }
6621                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6622         }
6623
6624         # contents
6625         for (my $i = 0; $i <= $#commitlist; $i++) {
6626                 my %co = %{$commitlist[$i]};
6627                 my $commit = $co{'id'};
6628                 # we read 150, we always show 30 and the ones more recent than 48 hours
6629                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6630                         last;
6631                 }
6632                 my %cd = parse_date($co{'author_epoch'});
6633
6634                 # get list of changed files
6635                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6636                         $co{'parent'} || "--root",
6637                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6638                         or next;
6639                 my @difftree = map { chomp; $_ } <$fd>;
6640                 close $fd
6641                         or next;
6642
6643                 # print element (entry, item)
6644                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6645                 if ($format eq 'rss') {
6646                         print "<item>\n" .
6647                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6648                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6649                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6650                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6651                               "<link>$co_url</link>\n" .
6652                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6653                               "<content:encoded>" .
6654                               "<![CDATA[\n";
6655                 } elsif ($format eq 'atom') {
6656                         print "<entry>\n" .
6657                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6658                               "<updated>$cd{'iso-8601'}</updated>\n" .
6659                               "<author>\n" .
6660                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6661                         if ($co{'author_email'}) {
6662                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6663                         }
6664                         print "</author>\n" .
6665                               # use committer for contributor
6666                               "<contributor>\n" .
6667                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6668                         if ($co{'committer_email'}) {
6669                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6670                         }
6671                         print "</contributor>\n" .
6672                               "<published>$cd{'iso-8601'}</published>\n" .
6673                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6674                               "<id>$co_url</id>\n" .
6675                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6676                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6677                 }
6678                 my $comment = $co{'comment'};
6679                 print "<pre>\n";
6680                 foreach my $line (@$comment) {
6681                         $line = esc_html($line);
6682                         print "$line\n";
6683                 }
6684                 print "</pre><ul>\n";
6685                 foreach my $difftree_line (@difftree) {
6686                         my %difftree = parse_difftree_raw_line($difftree_line);
6687                         next if !$difftree{'from_id'};
6688
6689                         my $file = $difftree{'file'} || $difftree{'to_file'};
6690
6691                         print "<li>" .
6692                               "[" .
6693                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6694                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6695                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6696                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6697                                       -title => "diff"}, 'D');
6698                         if ($have_blame) {
6699                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6700                                                              file_name=>$file, hash_base=>$commit),
6701                                               -title => "blame"}, 'B');
6702                         }
6703                         # if this is not a feed of a file history
6704                         if (!defined $file_name || $file_name ne $file) {
6705                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6706                                                              file_name=>$file, hash=>$commit),
6707                                               -title => "history"}, 'H');
6708                         }
6709                         $file = esc_path($file);
6710                         print "] ".
6711                               "$file</li>\n";
6712                 }
6713                 if ($format eq 'rss') {
6714                         print "</ul>]]>\n" .
6715                               "</content:encoded>\n" .
6716                               "</item>\n";
6717                 } elsif ($format eq 'atom') {
6718                         print "</ul>\n</div>\n" .
6719                               "</content>\n" .
6720                               "</entry>\n";
6721                 }
6722         }
6723
6724         # end of feed
6725         if ($format eq 'rss') {
6726                 print "</channel>\n</rss>\n";
6727         } elsif ($format eq 'atom') {
6728                 print "</feed>\n";
6729         }
6730 }
6731
6732 sub git_rss {
6733         git_feed('rss');
6734 }
6735
6736 sub git_atom {
6737         git_feed('atom');
6738 }
6739
6740 sub git_opml {
6741         my @list = git_get_projects_list();
6742
6743         print $cgi->header(
6744                 -type => 'text/xml',
6745                 -charset => 'utf-8',
6746                 -content_disposition => 'inline; filename="opml.xml"');
6747
6748         print <<XML;
6749 <?xml version="1.0" encoding="utf-8"?>
6750 <opml version="1.0">
6751 <head>
6752   <title>$site_name OPML Export</title>
6753 </head>
6754 <body>
6755 <outline text="git RSS feeds">
6756 XML
6757
6758         foreach my $pr (@list) {
6759                 my %proj = %$pr;
6760                 my $head = git_get_head_hash($proj{'path'});
6761                 if (!defined $head) {
6762                         next;
6763                 }
6764                 $git_dir = "$projectroot/$proj{'path'}";
6765                 my %co = parse_commit($head);
6766                 if (!%co) {
6767                         next;
6768                 }
6769
6770                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6771                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6772                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6773                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6774         }
6775         print <<XML;
6776 </outline>
6777 </body>
6778 </opml>
6779 XML
6780 }