gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git-scm.com/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 199 # are changed, it may be appropriate to change these values too via
 200 # $GITWEB_CONFIG.
 201 our %avatar_size = (
 202         'default' => 16,
 203         'double'  => 32
 204 );
 205
 206 # You define site-wide feature defaults here; override them with
 207 # $GITWEB_CONFIG as necessary.
 208 our %feature = (
 209         # feature => {
 210         #       'sub' => feature-sub (subroutine),
 211         #       'override' => allow-override (boolean),
 212         #       'default' => [ default options...] (array reference)}
 213         #
 214         # if feature is overridable (it means that allow-override has true value),
 215         # then feature-sub will be called with default options as parameters;
 216         # return value of feature-sub indicates if to enable specified feature
 217         #
 218         # if there is no 'sub' key (no feature-sub), then feature cannot be
 219         # overriden
 220         #
 221         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 222         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 223         # is enabled
 224
 225         # Enable the 'blame' blob view, showing the last commit that modified
 226         # each line in the file. This can be very CPU-intensive.
 227
 228         # To enable system wide have in $GITWEB_CONFIG
 229         # $feature{'blame'}{'default'} = [1];
 230         # To have project specific config enable override in $GITWEB_CONFIG
 231         # $feature{'blame'}{'override'} = 1;
 232         # and in project config gitweb.blame = 0|1;
 233         'blame' => {
 234                 'sub' => sub { feature_bool('blame', @_) },
 235                 'override' => 0,
 236                 'default' => [0]},
 237
 238         # Enable the 'snapshot' link, providing a compressed archive of any
 239         # tree. This can potentially generate high traffic if you have large
 240         # project.
 241
 242         # Value is a list of formats defined in %known_snapshot_formats that
 243         # you wish to offer.
 244         # To disable system wide have in $GITWEB_CONFIG
 245         # $feature{'snapshot'}{'default'} = [];
 246         # To have project specific config enable override in $GITWEB_CONFIG
 247         # $feature{'snapshot'}{'override'} = 1;
 248         # and in project config, a comma-separated list of formats or "none"
 249         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 250         'snapshot' => {
 251                 'sub' => \&feature_snapshot,
 252                 'override' => 0,
 253                 'default' => ['tgz']},
 254
 255         # Enable text search, which will list the commits which match author,
 256         # committer or commit text to a given string.  Enabled by default.
 257         # Project specific override is not supported.
 258         'search' => {
 259                 'override' => 0,
 260                 'default' => [1]},
 261
 262         # Enable grep search, which will list the files in currently selected
 263         # tree containing the given string. Enabled by default. This can be
 264         # potentially CPU-intensive, of course.
 265
 266         # To enable system wide have in $GITWEB_CONFIG
 267         # $feature{'grep'}{'default'} = [1];
 268         # To have project specific config enable override in $GITWEB_CONFIG
 269         # $feature{'grep'}{'override'} = 1;
 270         # and in project config gitweb.grep = 0|1;
 271         'grep' => {
 272                 'sub' => sub { feature_bool('grep', @_) },
 273                 'override' => 0,
 274                 'default' => [1]},
 275
 276         # Enable the pickaxe search, which will list the commits that modified
 277         # a given string in a file. This can be practical and quite faster
 278         # alternative to 'blame', but still potentially CPU-intensive.
 279
 280         # To enable system wide have in $GITWEB_CONFIG
 281         # $feature{'pickaxe'}{'default'} = [1];
 282         # To have project specific config enable override in $GITWEB_CONFIG
 283         # $feature{'pickaxe'}{'override'} = 1;
 284         # and in project config gitweb.pickaxe = 0|1;
 285         'pickaxe' => {
 286                 'sub' => sub { feature_bool('pickaxe', @_) },
 287                 'override' => 0,
 288                 'default' => [1]},
 289
 290         # Make gitweb use an alternative format of the URLs which can be
 291         # more readable and natural-looking: project name is embedded
 292         # directly in the path and the query string contains other
 293         # auxiliary information. All gitweb installations recognize
 294         # URL in either format; this configures in which formats gitweb
 295         # generates links.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'pathinfo'}{'default'} = [1];
 299         # Project specific override is not supported.
 300
 301         # Note that you will need to change the default location of CSS,
 302         # favicon, logo and possibly other files to an absolute URL. Also,
 303         # if gitweb.cgi serves as your indexfile, you will need to force
 304         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 305         'pathinfo' => {
 306                 'override' => 0,
 307                 'default' => [0]},
 308
 309         # Make gitweb consider projects in project root subdirectories
 310         # to be forks of existing projects. Given project $projname.git,
 311         # projects matching $projname/*.git will not be shown in the main
 312         # projects list, instead a '+' mark will be added to $projname
 313         # there and a 'forks' view will be enabled for the project, listing
 314         # all the forks. If project list is taken from a file, forks have
 315         # to be listed after the main project.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'forks'}{'default'} = [1];
 319         # Project specific override is not supported.
 320         'forks' => {
 321                 'override' => 0,
 322                 'default' => [0]},
 323
 324         # Insert custom links to the action bar of all project pages.
 325         # This enables you mainly to link to third-party scripts integrating
 326         # into gitweb; e.g. git-browser for graphical history representation
 327         # or custom web-based repository administration interface.
 328
 329         # The 'default' value consists of a list of triplets in the form
 330         # (label, link, position) where position is the label after which
 331         # to insert the link and link is a format string where %n expands
 332         # to the project name, %f to the project path within the filesystem,
 333         # %h to the current hash (h gitweb parameter) and %b to the current
 334         # hash base (hb gitweb parameter); %% expands to %.
 335
 336         # To enable system wide have in $GITWEB_CONFIG e.g.
 337         # $feature{'actions'}{'default'} = [('graphiclog',
 338         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 339         # Project specific override is not supported.
 340         'actions' => {
 341                 'override' => 0,
 342                 'default' => []},
 343
 344         # Allow gitweb scan project content tags described in ctags/
 345         # of project repository, and display the popular Web 2.0-ish
 346         # "tag cloud" near the project list. Note that this is something
 347         # COMPLETELY different from the normal Git tags.
 348
 349         # gitweb by itself can show existing tags, but it does not handle
 350         # tagging itself; you need an external application for that.
 351         # For an example script, check Girocco's cgi/tagproj.cgi.
 352         # You may want to install the HTML::TagCloud Perl module to get
 353         # a pretty tag cloud instead of just a list of tags.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 357         # Project specific override is not supported.
 358         'ctags' => {
 359                 'override' => 0,
 360                 'default' => [0]},
 361
 362         # The maximum number of patches in a patchset generated in patch
 363         # view. Set this to 0 or undef to disable patch view, or to a
 364         # negative number to remove any limit.
 365
 366         # To disable system wide have in $GITWEB_CONFIG
 367         # $feature{'patches'}{'default'} = [0];
 368         # To have project specific config enable override in $GITWEB_CONFIG
 369         # $feature{'patches'}{'override'} = 1;
 370         # and in project config gitweb.patches = 0|n;
 371         # where n is the maximum number of patches allowed in a patchset.
 372         'patches' => {
 373                 'sub' => \&feature_patches,
 374                 'override' => 0,
 375                 'default' => [16]},
 376
 377         # Avatar support. When this feature is enabled, views such as
 378         # shortlog or commit will display an avatar associated with
 379         # the email of the committer(s) and/or author(s).
 380
 381         # Currently available providers are gravatar and picon.
 382         # If an unknown provider is specified, the feature is disabled.
 383
 384         # Gravatar depends on Digest::MD5.
 385         # Picon currently relies on the indiana.edu database.
 386
 387         # To enable system wide have in $GITWEB_CONFIG
 388         # $feature{'avatar'}{'default'} = ['<provider>'];
 389         # where <provider> is either gravatar or picon.
 390         # To have project specific config enable override in $GITWEB_CONFIG
 391         # $feature{'avatar'}{'override'} = 1;
 392         # and in project config gitweb.avatar = <provider>;
 393         'avatar' => {
 394                 'sub' => \&feature_avatar,
 395                 'override' => 0,
 396                 'default' => ['']},
 397 );
 398
 399 sub gitweb_get_feature {
 400         my ($name) = @_;
 401         return unless exists $feature{$name};
 402         my ($sub, $override, @defaults) = (
 403                 $feature{$name}{'sub'},
 404                 $feature{$name}{'override'},
 405                 @{$feature{$name}{'default'}});
 406         if (!$override) { return @defaults; }
 407         if (!defined $sub) {
 408                 warn "feature $name is not overrideable";
 409                 return @defaults;
 410         }
 411         return $sub->(@defaults);
 412 }
 413
 414 # A wrapper to check if a given feature is enabled.
 415 # With this, you can say
 416 #
 417 #   my $bool_feat = gitweb_check_feature('bool_feat');
 418 #   gitweb_check_feature('bool_feat') or somecode;
 419 #
 420 # instead of
 421 #
 422 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 423 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 424 #
 425 sub gitweb_check_feature {
 426         return (gitweb_get_feature(@_))[0];
 427 }
 428
 429
 430 sub feature_bool {
 431         my $key = shift;
 432         my ($val) = git_get_project_config($key, '--bool');
 433
 434         if (!defined $val) {
 435                 return ($_[0]);
 436         } elsif ($val eq 'true') {
 437                 return (1);
 438         } elsif ($val eq 'false') {
 439                 return (0);
 440         }
 441 }
 442
 443 sub feature_snapshot {
 444         my (@fmts) = @_;
 445
 446         my ($val) = git_get_project_config('snapshot');
 447
 448         if ($val) {
 449                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 450         }
 451
 452         return @fmts;
 453 }
 454
 455 sub feature_patches {
 456         my @val = (git_get_project_config('patches', '--int'));
 457
 458         if (@val) {
 459                 return @val;
 460         }
 461
 462         return ($_[0]);
 463 }
 464
 465 sub feature_avatar {
 466         my @val = (git_get_project_config('avatar'));
 467
 468         return @val ? @val : @_;
 469 }
 470
 471 # checking HEAD file with -e is fragile if the repository was
 472 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 473 # and then pruned.
 474 sub check_head_link {
 475         my ($dir) = @_;
 476         my $headfile = "$dir/HEAD";
 477         return ((-e $headfile) ||
 478                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 479 }
 480
 481 sub check_export_ok {
 482         my ($dir) = @_;
 483         return (check_head_link($dir) &&
 484                 (!$export_ok || -e "$dir/$export_ok") &&
 485                 (!$export_auth_hook || $export_auth_hook->($dir)));
 486 }
 487
 488 # process alternate names for backward compatibility
 489 # filter out unsupported (unknown) snapshot formats
 490 sub filter_snapshot_fmts {
 491         my @fmts = @_;
 492
 493         @fmts = map {
 494                 exists $known_snapshot_format_aliases{$_} ?
 495                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 496         @fmts = grep {
 497                 exists $known_snapshot_formats{$_} } @fmts;
 498 }
 499
 500 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 501 if (-e $GITWEB_CONFIG) {
 502         do $GITWEB_CONFIG;
 503 } else {
 504         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 505         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 506 }
 507
 508 # version of the core git binary
 509 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 510
 511 $projects_list ||= $projectroot;
 512
 513 # ======================================================================
 514 # input validation and dispatch
 515
 516 # input parameters can be collected from a variety of sources (presently, CGI
 517 # and PATH_INFO), so we define an %input_params hash that collects them all
 518 # together during validation: this allows subsequent uses (e.g. href()) to be
 519 # agnostic of the parameter origin
 520
 521 our %input_params = ();
 522
 523 # input parameters are stored with the long parameter name as key. This will
 524 # also be used in the href subroutine to convert parameters to their CGI
 525 # equivalent, and since the href() usage is the most frequent one, we store
 526 # the name -> CGI key mapping here, instead of the reverse.
 527 #
 528 # XXX: Warning: If you touch this, check the search form for updating,
 529 # too.
 530
 531 our @cgi_param_mapping = (
 532         project => "p",
 533         action => "a",
 534         file_name => "f",
 535         file_parent => "fp",
 536         hash => "h",
 537         hash_parent => "hp",
 538         hash_base => "hb",
 539         hash_parent_base => "hpb",
 540         page => "pg",
 541         order => "o",
 542         searchtext => "s",
 543         searchtype => "st",
 544         snapshot_format => "sf",
 545         extra_options => "opt",
 546         search_use_regexp => "sr",
 547 );
 548 our %cgi_param_mapping = @cgi_param_mapping;
 549
 550 # we will also need to know the possible actions, for validation
 551 our %actions = (
 552         "blame" => \&git_blame,
 553         "blobdiff" => \&git_blobdiff,
 554         "blobdiff_plain" => \&git_blobdiff_plain,
 555         "blob" => \&git_blob,
 556         "blob_plain" => \&git_blob_plain,
 557         "commitdiff" => \&git_commitdiff,
 558         "commitdiff_plain" => \&git_commitdiff_plain,
 559         "commit" => \&git_commit,
 560         "forks" => \&git_forks,
 561         "heads" => \&git_heads,
 562         "history" => \&git_history,
 563         "log" => \&git_log,
 564         "patch" => \&git_patch,
 565         "patches" => \&git_patches,
 566         "rss" => \&git_rss,
 567         "atom" => \&git_atom,
 568         "search" => \&git_search,
 569         "search_help" => \&git_search_help,
 570         "shortlog" => \&git_shortlog,
 571         "summary" => \&git_summary,
 572         "tag" => \&git_tag,
 573         "tags" => \&git_tags,
 574         "tree" => \&git_tree,
 575         "snapshot" => \&git_snapshot,
 576         "object" => \&git_object,
 577         # those below don't need $project
 578         "opml" => \&git_opml,
 579         "project_list" => \&git_project_list,
 580         "project_index" => \&git_project_index,
 581 );
 582
 583 # finally, we have the hash of allowed extra_options for the commands that
 584 # allow them
 585 our %allowed_options = (
 586         "--no-merges" => [ qw(rss atom log shortlog history) ],
 587 );
 588
 589 # fill %input_params with the CGI parameters. All values except for 'opt'
 590 # should be single values, but opt can be an array. We should probably
 591 # build an array of parameters that can be multi-valued, but since for the time
 592 # being it's only this one, we just single it out
 593 while (my ($name, $symbol) = each %cgi_param_mapping) {
 594         if ($symbol eq 'opt') {
 595                 $input_params{$name} = [ $cgi->param($symbol) ];
 596         } else {
 597                 $input_params{$name} = $cgi->param($symbol);
 598         }
 599 }
 600
 601 # now read PATH_INFO and update the parameter list for missing parameters
 602 sub evaluate_path_info {
 603         return if defined $input_params{'project'};
 604         return if !$path_info;
 605         $path_info =~ s,^/+,,;
 606         return if !$path_info;
 607
 608         # find which part of PATH_INFO is project
 609         my $project = $path_info;
 610         $project =~ s,/+$,,;
 611         while ($project && !check_head_link("$projectroot/$project")) {
 612                 $project =~ s,/*[^/]*$,,;
 613         }
 614         return unless $project;
 615         $input_params{'project'} = $project;
 616
 617         # do not change any parameters if an action is given using the query string
 618         return if $input_params{'action'};
 619         $path_info =~ s,^\Q$project\E/*,,;
 620
 621         # next, check if we have an action
 622         my $action = $path_info;
 623         $action =~ s,/.*$,,;
 624         if (exists $actions{$action}) {
 625                 $path_info =~ s,^$action/*,,;
 626                 $input_params{'action'} = $action;
 627         }
 628
 629         # list of actions that want hash_base instead of hash, but can have no
 630         # pathname (f) parameter
 631         my @wants_base = (
 632                 'tree',
 633                 'history',
 634         );
 635
 636         # we want to catch
 637         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 638         my ($parentrefname, $parentpathname, $refname, $pathname) =
 639                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 640
 641         # first, analyze the 'current' part
 642         if (defined $pathname) {
 643                 # we got "branch:filename" or "branch:dir/"
 644                 # we could use git_get_type(branch:pathname), but:
 645                 # - it needs $git_dir
 646                 # - it does a git() call
 647                 # - the convention of terminating directories with a slash
 648                 #   makes it superfluous
 649                 # - embedding the action in the PATH_INFO would make it even
 650                 #   more superfluous
 651                 $pathname =~ s,^/+,,;
 652                 if (!$pathname || substr($pathname, -1) eq "/") {
 653                         $input_params{'action'} ||= "tree";
 654                         $pathname =~ s,/$,,;
 655                 } else {
 656                         # the default action depends on whether we had parent info
 657                         # or not
 658                         if ($parentrefname) {
 659                                 $input_params{'action'} ||= "blobdiff_plain";
 660                         } else {
 661                                 $input_params{'action'} ||= "blob_plain";
 662                         }
 663                 }
 664                 $input_params{'hash_base'} ||= $refname;
 665                 $input_params{'file_name'} ||= $pathname;
 666         } elsif (defined $refname) {
 667                 # we got "branch". In this case we have to choose if we have to
 668                 # set hash or hash_base.
 669                 #
 670                 # Most of the actions without a pathname only want hash to be
 671                 # set, except for the ones specified in @wants_base that want
 672                 # hash_base instead. It should also be noted that hand-crafted
 673                 # links having 'history' as an action and no pathname or hash
 674                 # set will fail, but that happens regardless of PATH_INFO.
 675                 $input_params{'action'} ||= "shortlog";
 676                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 677                         $input_params{'hash_base'} ||= $refname;
 678                 } else {
 679                         $input_params{'hash'} ||= $refname;
 680                 }
 681         }
 682
 683         # next, handle the 'parent' part, if present
 684         if (defined $parentrefname) {
 685                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 686                 # someproject/blobdiff/oldrev..newrev:/filename
 687                 if ($parentpathname) {
 688                         $parentpathname =~ s,^/+,,;
 689                         $parentpathname =~ s,/$,,;
 690                         $input_params{'file_parent'} ||= $parentpathname;
 691                 } else {
 692                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 693                 }
 694                 # we assume that hash_parent_base is wanted if a path was specified,
 695                 # or if the action wants hash_base instead of hash
 696                 if (defined $input_params{'file_parent'} ||
 697                         grep { $_ eq $input_params{'action'} } @wants_base) {
 698                         $input_params{'hash_parent_base'} ||= $parentrefname;
 699                 } else {
 700                         $input_params{'hash_parent'} ||= $parentrefname;
 701                 }
 702         }
 703
 704         # for the snapshot action, we allow URLs in the form
 705         # $project/snapshot/$hash.ext
 706         # where .ext determines the snapshot and gets removed from the
 707         # passed $refname to provide the $hash.
 708         #
 709         # To be able to tell that $refname includes the format extension, we
 710         # require the following two conditions to be satisfied:
 711         # - the hash input parameter MUST have been set from the $refname part
 712         #   of the URL (i.e. they must be equal)
 713         # - the snapshot format MUST NOT have been defined already (e.g. from
 714         #   CGI parameter sf)
 715         # It's also useless to try any matching unless $refname has a dot,
 716         # so we check for that too
 717         if (defined $input_params{'action'} &&
 718                 $input_params{'action'} eq 'snapshot' &&
 719                 defined $refname && index($refname, '.') != -1 &&
 720                 $refname eq $input_params{'hash'} &&
 721                 !defined $input_params{'snapshot_format'}) {
 722                 # We loop over the known snapshot formats, checking for
 723                 # extensions. Allowed extensions are both the defined suffix
 724                 # (which includes the initial dot already) and the snapshot
 725                 # format key itself, with a prepended dot
 726                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 727                         my $hash = $refname;
 728                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 729                                 next;
 730                         }
 731                         my $sfx = $1;
 732                         # a valid suffix was found, so set the snapshot format
 733                         # and reset the hash parameter
 734                         $input_params{'snapshot_format'} = $fmt;
 735                         $input_params{'hash'} = $hash;
 736                         # we also set the format suffix to the one requested
 737                         # in the URL: this way a request for e.g. .tgz returns
 738                         # a .tgz instead of a .tar.gz
 739                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 740                         last;
 741                 }
 742         }
 743 }
 744 evaluate_path_info();
 745
 746 our $action = $input_params{'action'};
 747 if (defined $action) {
 748         if (!validate_action($action)) {
 749                 die_error(400, "Invalid action parameter");
 750         }
 751 }
 752
 753 # parameters which are pathnames
 754 our $project = $input_params{'project'};
 755 if (defined $project) {
 756         if (!validate_project($project)) {
 757                 undef $project;
 758                 die_error(404, "No such project");
 759         }
 760 }
 761
 762 our $file_name = $input_params{'file_name'};
 763 if (defined $file_name) {
 764         if (!validate_pathname($file_name)) {
 765                 die_error(400, "Invalid file parameter");
 766         }
 767 }
 768
 769 our $file_parent = $input_params{'file_parent'};
 770 if (defined $file_parent) {
 771         if (!validate_pathname($file_parent)) {
 772                 die_error(400, "Invalid file parent parameter");
 773         }
 774 }
 775
 776 # parameters which are refnames
 777 our $hash = $input_params{'hash'};
 778 if (defined $hash) {
 779         if (!validate_refname($hash)) {
 780                 die_error(400, "Invalid hash parameter");
 781         }
 782 }
 783
 784 our $hash_parent = $input_params{'hash_parent'};
 785 if (defined $hash_parent) {
 786         if (!validate_refname($hash_parent)) {
 787                 die_error(400, "Invalid hash parent parameter");
 788         }
 789 }
 790
 791 our $hash_base = $input_params{'hash_base'};
 792 if (defined $hash_base) {
 793         if (!validate_refname($hash_base)) {
 794                 die_error(400, "Invalid hash base parameter");
 795         }
 796 }
 797
 798 our @extra_options = @{$input_params{'extra_options'}};
 799 # @extra_options is always defined, since it can only be (currently) set from
 800 # CGI, and $cgi->param() returns the empty array in array context if the param
 801 # is not set
 802 foreach my $opt (@extra_options) {
 803         if (not exists $allowed_options{$opt}) {
 804                 die_error(400, "Invalid option parameter");
 805         }
 806         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 807                 die_error(400, "Invalid option parameter for this action");
 808         }
 809 }
 810
 811 our $hash_parent_base = $input_params{'hash_parent_base'};
 812 if (defined $hash_parent_base) {
 813         if (!validate_refname($hash_parent_base)) {
 814                 die_error(400, "Invalid hash parent base parameter");
 815         }
 816 }
 817
 818 # other parameters
 819 our $page = $input_params{'page'};
 820 if (defined $page) {
 821         if ($page =~ m/[^0-9]/) {
 822                 die_error(400, "Invalid page parameter");
 823         }
 824 }
 825
 826 our $searchtype = $input_params{'searchtype'};
 827 if (defined $searchtype) {
 828         if ($searchtype =~ m/[^a-z]/) {
 829                 die_error(400, "Invalid searchtype parameter");
 830         }
 831 }
 832
 833 our $search_use_regexp = $input_params{'search_use_regexp'};
 834
 835 our $searchtext = $input_params{'searchtext'};
 836 our $search_regexp;
 837 if (defined $searchtext) {
 838         if (length($searchtext) < 2) {
 839                 die_error(403, "At least two characters are required for search parameter");
 840         }
 841         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 842 }
 843
 844 # path to the current git repository
 845 our $git_dir;
 846 $git_dir = "$projectroot/$project" if $project;
 847
 848 # list of supported snapshot formats
 849 our @snapshot_fmts = gitweb_get_feature('snapshot');
 850 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 851
 852 # check that the avatar feature is set to a known provider name,
 853 # and for each provider check if the dependencies are satisfied.
 854 # if the provider name is invalid or the dependencies are not met,
 855 # reset $git_avatar to the empty string.
 856 our ($git_avatar) = gitweb_get_feature('avatar');
 857 if ($git_avatar eq 'gravatar') {
 858         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 859 } elsif ($git_avatar eq 'picon') {
 860         # no dependencies
 861 } else {
 862         $git_avatar = '';
 863 }
 864
 865 # dispatch
 866 if (!defined $action) {
 867         if (defined $hash) {
 868                 $action = git_get_type($hash);
 869         } elsif (defined $hash_base && defined $file_name) {
 870                 $action = git_get_type("$hash_base:$file_name");
 871         } elsif (defined $project) {
 872                 $action = 'summary';
 873         } else {
 874                 $action = 'project_list';
 875         }
 876 }
 877 if (!defined($actions{$action})) {
 878         die_error(400, "Unknown action");
 879 }
 880 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 881     !$project) {
 882         die_error(400, "Project needed");
 883 }
 884 $actions{$action}->();
 885 exit;
 886
 887 ## ======================================================================
 888 ## action links
 889
 890 sub href {
 891         my %params = @_;
 892         # default is to use -absolute url() i.e. $my_uri
 893         my $href = $params{-full} ? $my_url : $my_uri;
 894
 895         $params{'project'} = $project unless exists $params{'project'};
 896
 897         if ($params{-replay}) {
 898                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 899                         if (!exists $params{$name}) {
 900                                 $params{$name} = $input_params{$name};
 901                         }
 902                 }
 903         }
 904
 905         my $use_pathinfo = gitweb_check_feature('pathinfo');
 906         if ($use_pathinfo and defined $params{'project'}) {
 907                 # try to put as many parameters as possible in PATH_INFO:
 908                 #   - project name
 909                 #   - action
 910                 #   - hash_parent or hash_parent_base:/file_parent
 911                 #   - hash or hash_base:/filename
 912                 #   - the snapshot_format as an appropriate suffix
 913
 914                 # When the script is the root DirectoryIndex for the domain,
 915                 # $href here would be something like http://gitweb.example.com/
 916                 # Thus, we strip any trailing / from $href, to spare us double
 917                 # slashes in the final URL
 918                 $href =~ s,/$,,;
 919
 920                 # Then add the project name, if present
 921                 $href .= "/".esc_url($params{'project'});
 922                 delete $params{'project'};
 923
 924                 # since we destructively absorb parameters, we keep this
 925                 # boolean that remembers if we're handling a snapshot
 926                 my $is_snapshot = $params{'action'} eq 'snapshot';
 927
 928                 # Summary just uses the project path URL, any other action is
 929                 # added to the URL
 930                 if (defined $params{'action'}) {
 931                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 932                         delete $params{'action'};
 933                 }
 934
 935                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 936                 # stripping nonexistent or useless pieces
 937                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 938                         || $params{'hash_parent'} || $params{'hash'});
 939                 if (defined $params{'hash_base'}) {
 940                         if (defined $params{'hash_parent_base'}) {
 941                                 $href .= esc_url($params{'hash_parent_base'});
 942                                 # skip the file_parent if it's the same as the file_name
 943                                 if (defined $params{'file_parent'}) {
 944                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 945                                                 delete $params{'file_parent'};
 946                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 947                                                 $href .= ":/".esc_url($params{'file_parent'});
 948                                                 delete $params{'file_parent'};
 949                                         }
 950                                 }
 951                                 $href .= "..";
 952                                 delete $params{'hash_parent'};
 953                                 delete $params{'hash_parent_base'};
 954                         } elsif (defined $params{'hash_parent'}) {
 955                                 $href .= esc_url($params{'hash_parent'}). "..";
 956                                 delete $params{'hash_parent'};
 957                         }
 958
 959                         $href .= esc_url($params{'hash_base'});
 960                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 961                                 $href .= ":/".esc_url($params{'file_name'});
 962                                 delete $params{'file_name'};
 963                         }
 964                         delete $params{'hash'};
 965                         delete $params{'hash_base'};
 966                 } elsif (defined $params{'hash'}) {
 967                         $href .= esc_url($params{'hash'});
 968                         delete $params{'hash'};
 969                 }
 970
 971                 # If the action was a snapshot, we can absorb the
 972                 # snapshot_format parameter too
 973                 if ($is_snapshot) {
 974                         my $fmt = $params{'snapshot_format'};
 975                         # snapshot_format should always be defined when href()
 976                         # is called, but just in case some code forgets, we
 977                         # fall back to the default
 978                         $fmt ||= $snapshot_fmts[0];
 979                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 980                         delete $params{'snapshot_format'};
 981                 }
 982         }
 983
 984         # now encode the parameters explicitly
 985         my @result = ();
 986         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 987                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 988                 if (defined $params{$name}) {
 989                         if (ref($params{$name}) eq "ARRAY") {
 990                                 foreach my $par (@{$params{$name}}) {
 991                                         push @result, $symbol . "=" . esc_param($par);
 992                                 }
 993                         } else {
 994                                 push @result, $symbol . "=" . esc_param($params{$name});
 995                         }
 996                 }
 997         }
 998         $href .= "?" . join(';', @result) if scalar @result;
 999
1000         return $href;
1001 }
1002
1003
1004 ## ======================================================================
1005 ## validation, quoting/unquoting and escaping
1006
1007 sub validate_action {
1008         my $input = shift || return undef;
1009         return undef unless exists $actions{$input};
1010         return $input;
1011 }
1012
1013 sub validate_project {
1014         my $input = shift || return undef;
1015         if (!validate_pathname($input) ||
1016                 !(-d "$projectroot/$input") ||
1017                 !check_export_ok("$projectroot/$input") ||
1018                 ($strict_export && !project_in_list($input))) {
1019                 return undef;
1020         } else {
1021                 return $input;
1022         }
1023 }
1024
1025 sub validate_pathname {
1026         my $input = shift || return undef;
1027
1028         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1029         # at the beginning, at the end, and between slashes.
1030         # also this catches doubled slashes
1031         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1032                 return undef;
1033         }
1034         # no null characters
1035         if ($input =~ m!\0!) {
1036                 return undef;
1037         }
1038         return $input;
1039 }
1040
1041 sub validate_refname {
1042         my $input = shift || return undef;
1043
1044         # textual hashes are O.K.
1045         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1046                 return $input;
1047         }
1048         # it must be correct pathname
1049         $input = validate_pathname($input)
1050                 or return undef;
1051         # restrictions on ref name according to git-check-ref-format
1052         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1053                 return undef;
1054         }
1055         return $input;
1056 }
1057
1058 # decode sequences of octets in utf8 into Perl's internal form,
1059 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1060 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1061 sub to_utf8 {
1062         my $str = shift;
1063         if (utf8::valid($str)) {
1064                 utf8::decode($str);
1065                 return $str;
1066         } else {
1067                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1068         }
1069 }
1070
1071 # quote unsafe chars, but keep the slash, even when it's not
1072 # correct, but quoted slashes look too horrible in bookmarks
1073 sub esc_param {
1074         my $str = shift;
1075         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1076         $str =~ s/\+/%2B/g;
1077         $str =~ s/ /\+/g;
1078         return $str;
1079 }
1080
1081 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1082 sub esc_url {
1083         my $str = shift;
1084         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1085         $str =~ s/\+/%2B/g;
1086         $str =~ s/ /\+/g;
1087         return $str;
1088 }
1089
1090 # replace invalid utf8 character with SUBSTITUTION sequence
1091 sub esc_html {
1092         my $str = shift;
1093         my %opts = @_;
1094
1095         $str = to_utf8($str);
1096         $str = $cgi->escapeHTML($str);
1097         if ($opts{'-nbsp'}) {
1098                 $str =~ s/ /&nbsp;/g;
1099         }
1100         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1101         return $str;
1102 }
1103
1104 # quote control characters and escape filename to HTML
1105 sub esc_path {
1106         my $str = shift;
1107         my %opts = @_;
1108
1109         $str = to_utf8($str);
1110         $str = $cgi->escapeHTML($str);
1111         if ($opts{'-nbsp'}) {
1112                 $str =~ s/ /&nbsp;/g;
1113         }
1114         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1115         return $str;
1116 }
1117
1118 # Make control characters "printable", using character escape codes (CEC)
1119 sub quot_cec {
1120         my $cntrl = shift;
1121         my %opts = @_;
1122         my %es = ( # character escape codes, aka escape sequences
1123                 "\t" => '\t',   # tab            (HT)
1124                 "\n" => '\n',   # line feed      (LF)
1125                 "\r" => '\r',   # carrige return (CR)
1126                 "\f" => '\f',   # form feed      (FF)
1127                 "\b" => '\b',   # backspace      (BS)
1128                 "\a" => '\a',   # alarm (bell)   (BEL)
1129                 "\e" => '\e',   # escape         (ESC)
1130                 "\013" => '\v', # vertical tab   (VT)
1131                 "\000" => '\0', # nul character  (NUL)
1132         );
1133         my $chr = ( (exists $es{$cntrl})
1134                     ? $es{$cntrl}
1135                     : sprintf('\%2x', ord($cntrl)) );
1136         if ($opts{-nohtml}) {
1137                 return $chr;
1138         } else {
1139                 return "<span class=\"cntrl\">$chr</span>";
1140         }
1141 }
1142
1143 # Alternatively use unicode control pictures codepoints,
1144 # Unicode "printable representation" (PR)
1145 sub quot_upr {
1146         my $cntrl = shift;
1147         my %opts = @_;
1148
1149         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1150         if ($opts{-nohtml}) {
1151                 return $chr;
1152         } else {
1153                 return "<span class=\"cntrl\">$chr</span>";
1154         }
1155 }
1156
1157 # git may return quoted and escaped filenames
1158 sub unquote {
1159         my $str = shift;
1160
1161         sub unq {
1162                 my $seq = shift;
1163                 my %es = ( # character escape codes, aka escape sequences
1164                         't' => "\t",   # tab            (HT, TAB)
1165                         'n' => "\n",   # newline        (NL)
1166                         'r' => "\r",   # return         (CR)
1167                         'f' => "\f",   # form feed      (FF)
1168                         'b' => "\b",   # backspace      (BS)
1169                         'a' => "\a",   # alarm (bell)   (BEL)
1170                         'e' => "\e",   # escape         (ESC)
1171                         'v' => "\013", # vertical tab   (VT)
1172                 );
1173
1174                 if ($seq =~ m/^[0-7]{1,3}$/) {
1175                         # octal char sequence
1176                         return chr(oct($seq));
1177                 } elsif (exists $es{$seq}) {
1178                         # C escape sequence, aka character escape code
1179                         return $es{$seq};
1180                 }
1181                 # quoted ordinary character
1182                 return $seq;
1183         }
1184
1185         if ($str =~ m/^"(.*)"$/) {
1186                 # needs unquoting
1187                 $str = $1;
1188                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1189         }
1190         return $str;
1191 }
1192
1193 # escape tabs (convert tabs to spaces)
1194 sub untabify {
1195         my $line = shift;
1196
1197         while ((my $pos = index($line, "\t")) != -1) {
1198                 if (my $count = (8 - ($pos % 8))) {
1199                         my $spaces = ' ' x $count;
1200                         $line =~ s/\t/$spaces/;
1201                 }
1202         }
1203
1204         return $line;
1205 }
1206
1207 sub project_in_list {
1208         my $project = shift;
1209         my @list = git_get_projects_list();
1210         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1211 }
1212
1213 ## ----------------------------------------------------------------------
1214 ## HTML aware string manipulation
1215
1216 # Try to chop given string on a word boundary between position
1217 # $len and $len+$add_len. If there is no word boundary there,
1218 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1219 # (marking chopped part) would be longer than given string.
1220 sub chop_str {
1221         my $str = shift;
1222         my $len = shift;
1223         my $add_len = shift || 10;
1224         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1225
1226         # Make sure perl knows it is utf8 encoded so we don't
1227         # cut in the middle of a utf8 multibyte char.
1228         $str = to_utf8($str);
1229
1230         # allow only $len chars, but don't cut a word if it would fit in $add_len
1231         # if it doesn't fit, cut it if it's still longer than the dots we would add
1232         # remove chopped character entities entirely
1233
1234         # when chopping in the middle, distribute $len into left and right part
1235         # return early if chopping wouldn't make string shorter
1236         if ($where eq 'center') {
1237                 return $str if ($len + 5 >= length($str)); # filler is length 5
1238                 $len = int($len/2);
1239         } else {
1240                 return $str if ($len + 4 >= length($str)); # filler is length 4
1241         }
1242
1243         # regexps: ending and beginning with word part up to $add_len
1244         my $endre = qr/.{$len}\w{0,$add_len}/;
1245         my $begre = qr/\w{0,$add_len}.{$len}/;
1246
1247         if ($where eq 'left') {
1248                 $str =~ m/^(.*?)($begre)$/;
1249                 my ($lead, $body) = ($1, $2);
1250                 if (length($lead) > 4) {
1251                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1252                         $lead = " ...";
1253                 }
1254                 return "$lead$body";
1255
1256         } elsif ($where eq 'center') {
1257                 $str =~ m/^($endre)(.*)$/;
1258                 my ($left, $str)  = ($1, $2);
1259                 $str =~ m/^(.*?)($begre)$/;
1260                 my ($mid, $right) = ($1, $2);
1261                 if (length($mid) > 5) {
1262                         $left  =~ s/&[^;]*$//;
1263                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1264                         $mid = " ... ";
1265                 }
1266                 return "$left$mid$right";
1267
1268         } else {
1269                 $str =~ m/^($endre)(.*)$/;
1270                 my $body = $1;
1271                 my $tail = $2;
1272                 if (length($tail) > 4) {
1273                         $body =~ s/&[^;]*$//;
1274                         $tail = "... ";
1275                 }
1276                 return "$body$tail";
1277         }
1278 }
1279
1280 # takes the same arguments as chop_str, but also wraps a <span> around the
1281 # result with a title attribute if it does get chopped. Additionally, the
1282 # string is HTML-escaped.
1283 sub chop_and_escape_str {
1284         my ($str) = @_;
1285
1286         my $chopped = chop_str(@_);
1287         if ($chopped eq $str) {
1288                 return esc_html($chopped);
1289         } else {
1290                 $str =~ s/[[:cntrl:]]/?/g;
1291                 return $cgi->span({-title=>$str}, esc_html($chopped));
1292         }
1293 }
1294
1295 ## ----------------------------------------------------------------------
1296 ## functions returning short strings
1297
1298 # CSS class for given age value (in seconds)
1299 sub age_class {
1300         my $age = shift;
1301
1302         if (!defined $age) {
1303                 return "noage";
1304         } elsif ($age < 60*60*2) {
1305                 return "age0";
1306         } elsif ($age < 60*60*24*2) {
1307                 return "age1";
1308         } else {
1309                 return "age2";
1310         }
1311 }
1312
1313 # convert age in seconds to "nn units ago" string
1314 sub age_string {
1315         my $age = shift;
1316         my $age_str;
1317
1318         if ($age > 60*60*24*365*2) {
1319                 $age_str = (int $age/60/60/24/365);
1320                 $age_str .= " years ago";
1321         } elsif ($age > 60*60*24*(365/12)*2) {
1322                 $age_str = int $age/60/60/24/(365/12);
1323                 $age_str .= " months ago";
1324         } elsif ($age > 60*60*24*7*2) {
1325                 $age_str = int $age/60/60/24/7;
1326                 $age_str .= " weeks ago";
1327         } elsif ($age > 60*60*24*2) {
1328                 $age_str = int $age/60/60/24;
1329                 $age_str .= " days ago";
1330         } elsif ($age > 60*60*2) {
1331                 $age_str = int $age/60/60;
1332                 $age_str .= " hours ago";
1333         } elsif ($age > 60*2) {
1334                 $age_str = int $age/60;
1335                 $age_str .= " min ago";
1336         } elsif ($age > 2) {
1337                 $age_str = int $age;
1338                 $age_str .= " sec ago";
1339         } else {
1340                 $age_str .= " right now";
1341         }
1342         return $age_str;
1343 }
1344
1345 use constant {
1346         S_IFINVALID => 0030000,
1347         S_IFGITLINK => 0160000,
1348 };
1349
1350 # submodule/subproject, a commit object reference
1351 sub S_ISGITLINK {
1352         my $mode = shift;
1353
1354         return (($mode & S_IFMT) == S_IFGITLINK)
1355 }
1356
1357 # convert file mode in octal to symbolic file mode string
1358 sub mode_str {
1359         my $mode = oct shift;
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return 'm---------';
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return 'drwxr-xr-x';
1365         } elsif (S_ISLNK($mode)) {
1366                 return 'lrwxrwxrwx';
1367         } elsif (S_ISREG($mode)) {
1368                 # git cares only about the executable bit
1369                 if ($mode & S_IXUSR) {
1370                         return '-rwxr-xr-x';
1371                 } else {
1372                         return '-rw-r--r--';
1373                 };
1374         } else {
1375                 return '----------';
1376         }
1377 }
1378
1379 # convert file mode in octal to file type string
1380 sub file_type {
1381         my $mode = shift;
1382
1383         if ($mode !~ m/^[0-7]+$/) {
1384                 return $mode;
1385         } else {
1386                 $mode = oct $mode;
1387         }
1388
1389         if (S_ISGITLINK($mode)) {
1390                 return "submodule";
1391         } elsif (S_ISDIR($mode & S_IFMT)) {
1392                 return "directory";
1393         } elsif (S_ISLNK($mode)) {
1394                 return "symlink";
1395         } elsif (S_ISREG($mode)) {
1396                 return "file";
1397         } else {
1398                 return "unknown";
1399         }
1400 }
1401
1402 # convert file mode in octal to file type description string
1403 sub file_type_long {
1404         my $mode = shift;
1405
1406         if ($mode !~ m/^[0-7]+$/) {
1407                 return $mode;
1408         } else {
1409                 $mode = oct $mode;
1410         }
1411
1412         if (S_ISGITLINK($mode)) {
1413                 return "submodule";
1414         } elsif (S_ISDIR($mode & S_IFMT)) {
1415                 return "directory";
1416         } elsif (S_ISLNK($mode)) {
1417                 return "symlink";
1418         } elsif (S_ISREG($mode)) {
1419                 if ($mode & S_IXUSR) {
1420                         return "executable";
1421                 } else {
1422                         return "file";
1423                 };
1424         } else {
1425                 return "unknown";
1426         }
1427 }
1428
1429
1430 ## ----------------------------------------------------------------------
1431 ## functions returning short HTML fragments, or transforming HTML fragments
1432 ## which don't belong to other sections
1433
1434 # format line of commit message.
1435 sub format_log_line_html {
1436         my $line = shift;
1437
1438         $line = esc_html($line, -nbsp=>1);
1439         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1440                 $cgi->a({-href => href(action=>"object", hash=>$1),
1441                                         -class => "text"}, $1);
1442         }eg;
1443
1444         return $line;
1445 }
1446
1447 # format marker of refs pointing to given object
1448
1449 # the destination action is chosen based on object type and current context:
1450 # - for annotated tags, we choose the tag view unless it's the current view
1451 #   already, in which case we go to shortlog view
1452 # - for other refs, we keep the current view if we're in history, shortlog or
1453 #   log view, and select shortlog otherwise
1454 sub format_ref_marker {
1455         my ($refs, $id) = @_;
1456         my $markers = '';
1457
1458         if (defined $refs->{$id}) {
1459                 foreach my $ref (@{$refs->{$id}}) {
1460                         # this code exploits the fact that non-lightweight tags are the
1461                         # only indirect objects, and that they are the only objects for which
1462                         # we want to use tag instead of shortlog as action
1463                         my ($type, $name) = qw();
1464                         my $indirect = ($ref =~ s/\^\{\}$//);
1465                         # e.g. tags/v2.6.11 or heads/next
1466                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1467                                 $type = $1;
1468                                 $name = $2;
1469                         } else {
1470                                 $type = "ref";
1471                                 $name = $ref;
1472                         }
1473
1474                         my $class = $type;
1475                         $class .= " indirect" if $indirect;
1476
1477                         my $dest_action = "shortlog";
1478
1479                         if ($indirect) {
1480                                 $dest_action = "tag" unless $action eq "tag";
1481                         } elsif ($action =~ /^(history|(short)?log)$/) {
1482                                 $dest_action = $action;
1483                         }
1484
1485                         my $dest = "";
1486                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1487                         $dest .= $ref;
1488
1489                         my $link = $cgi->a({
1490                                 -href => href(
1491                                         action=>$dest_action,
1492                                         hash=>$dest
1493                                 )}, $name);
1494
1495                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1496                                 $link . "</span>";
1497                 }
1498         }
1499
1500         if ($markers) {
1501                 return ' <span class="refs">'. $markers . '</span>';
1502         } else {
1503                 return "";
1504         }
1505 }
1506
1507 # format, perhaps shortened and with markers, title line
1508 sub format_subject_html {
1509         my ($long, $short, $href, $extra) = @_;
1510         $extra = '' unless defined($extra);
1511
1512         if (length($short) < length($long)) {
1513                 $long =~ s/[[:cntrl:]]/?/g;
1514                 return $cgi->a({-href => $href, -class => "list subject",
1515                                 -title => to_utf8($long)},
1516                        esc_html($short) . $extra);
1517         } else {
1518                 return $cgi->a({-href => $href, -class => "list subject"},
1519                        esc_html($long)  . $extra);
1520         }
1521 }
1522
1523 # Rather than recomputing the url for an email multiple times, we cache it
1524 # after the first hit. This gives a visible benefit in views where the avatar
1525 # for the same email is used repeatedly (e.g. shortlog).
1526 # The cache is shared by all avatar engines (currently gravatar only), which
1527 # are free to use it as preferred. Since only one avatar engine is used for any
1528 # given page, there's no risk for cache conflicts.
1529 our %avatar_cache = ();
1530
1531 # Compute the picon url for a given email, by using the picon search service over at
1532 # http://www.cs.indiana.edu/picons/search.html
1533 sub picon_url {
1534         my $email = lc shift;
1535         if (!$avatar_cache{$email}) {
1536                 my ($user, $domain) = split('@', $email);
1537                 $avatar_cache{$email} =
1538                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1539                         "$domain/$user/" .
1540                         "users+domains+unknown/up/single";
1541         }
1542         return $avatar_cache{$email};
1543 }
1544
1545 # Compute the gravatar url for a given email, if it's not in the cache already.
1546 # Gravatar stores only the part of the URL before the size, since that's the
1547 # one computationally more expensive. This also allows reuse of the cache for
1548 # different sizes (for this particular engine).
1549 sub gravatar_url {
1550         my $email = lc shift;
1551         my $size = shift;
1552         $avatar_cache{$email} ||=
1553                 "http://www.gravatar.com/avatar/" .
1554                         Digest::MD5::md5_hex($email) . "?s=";
1555         return $avatar_cache{$email} . $size;
1556 }
1557
1558 # Insert an avatar for the given $email at the given $size if the feature
1559 # is enabled.
1560 sub git_get_avatar {
1561         my ($email, %opts) = @_;
1562         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1563         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1564         $opts{-size} ||= 'default';
1565         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1566         my $url = "";
1567         if ($git_avatar eq 'gravatar') {
1568                 $url = gravatar_url($email, $size);
1569         } elsif ($git_avatar eq 'picon') {
1570                 $url = picon_url($email);
1571         }
1572         # Other providers can be added by extending the if chain, defining $url
1573         # as needed. If no variant puts something in $url, we assume avatars
1574         # are completely disabled/unavailable.
1575         if ($url) {
1576                 return $pre_white .
1577                        "<img width=\"$size\" " .
1578                             "class=\"avatar\" " .
1579                             "src=\"$url\" " .
1580                             "alt=\"\" " .
1581                        "/>" . $post_white;
1582         } else {
1583                 return "";
1584         }
1585 }
1586
1587 # format the author name of the given commit with the given tag
1588 # the author name is chopped and escaped according to the other
1589 # optional parameters (see chop_str).
1590 sub format_author_html {
1591         my $tag = shift;
1592         my $co = shift;
1593         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1594         return "<$tag class=\"author\">" .
1595                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1596                $author . "</$tag>";
1597 }
1598
1599 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1600 sub format_git_diff_header_line {
1601         my $line = shift;
1602         my $diffinfo = shift;
1603         my ($from, $to) = @_;
1604
1605         if ($diffinfo->{'nparents'}) {
1606                 # combined diff
1607                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1608                 if ($to->{'href'}) {
1609                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1610                                          esc_path($to->{'file'}));
1611                 } else { # file was deleted (no href)
1612                         $line .= esc_path($to->{'file'});
1613                 }
1614         } else {
1615                 # "ordinary" diff
1616                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1617                 if ($from->{'href'}) {
1618                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1619                                          'a/' . esc_path($from->{'file'}));
1620                 } else { # file was added (no href)
1621                         $line .= 'a/' . esc_path($from->{'file'});
1622                 }
1623                 $line .= ' ';
1624                 if ($to->{'href'}) {
1625                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1626                                          'b/' . esc_path($to->{'file'}));
1627                 } else { # file was deleted
1628                         $line .= 'b/' . esc_path($to->{'file'});
1629                 }
1630         }
1631
1632         return "<div class=\"diff header\">$line</div>\n";
1633 }
1634
1635 # format extended diff header line, before patch itself
1636 sub format_extended_diff_header_line {
1637         my $line = shift;
1638         my $diffinfo = shift;
1639         my ($from, $to) = @_;
1640
1641         # match <path>
1642         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1643                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1644                                        esc_path($from->{'file'}));
1645         }
1646         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1647                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1648                                  esc_path($to->{'file'}));
1649         }
1650         # match single <mode>
1651         if ($line =~ m/\s(\d{6})$/) {
1652                 $line .= '<span class="info"> (' .
1653                          file_type_long($1) .
1654                          ')</span>';
1655         }
1656         # match <hash>
1657         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1658                 # can match only for combined diff
1659                 $line = 'index ';
1660                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1661                         if ($from->{'href'}[$i]) {
1662                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1663                                                   -class=>"hash"},
1664                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1665                         } else {
1666                                 $line .= '0' x 7;
1667                         }
1668                         # separator
1669                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1670                 }
1671                 $line .= '..';
1672                 if ($to->{'href'}) {
1673                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1674                                          substr($diffinfo->{'to_id'},0,7));
1675                 } else {
1676                         $line .= '0' x 7;
1677                 }
1678
1679         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1680                 # can match only for ordinary diff
1681                 my ($from_link, $to_link);
1682                 if ($from->{'href'}) {
1683                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1684                                              substr($diffinfo->{'from_id'},0,7));
1685                 } else {
1686                         $from_link = '0' x 7;
1687                 }
1688                 if ($to->{'href'}) {
1689                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1690                                            substr($diffinfo->{'to_id'},0,7));
1691                 } else {
1692                         $to_link = '0' x 7;
1693                 }
1694                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1695                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1696         }
1697
1698         return $line . "<br/>\n";
1699 }
1700
1701 # format from-file/to-file diff header
1702 sub format_diff_from_to_header {
1703         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1704         my $line;
1705         my $result = '';
1706
1707         $line = $from_line;
1708         #assert($line =~ m/^---/) if DEBUG;
1709         # no extra formatting for "^--- /dev/null"
1710         if (! $diffinfo->{'nparents'}) {
1711                 # ordinary (single parent) diff
1712                 if ($line =~ m!^--- "?a/!) {
1713                         if ($from->{'href'}) {
1714                                 $line = '--- a/' .
1715                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1716                                                 esc_path($from->{'file'}));
1717                         } else {
1718                                 $line = '--- a/' .
1719                                         esc_path($from->{'file'});
1720                         }
1721                 }
1722                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1723
1724         } else {
1725                 # combined diff (merge commit)
1726                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1727                         if ($from->{'href'}[$i]) {
1728                                 $line = '--- ' .
1729                                         $cgi->a({-href=>href(action=>"blobdiff",
1730                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1731                                                              hash_parent_base=>$parents[$i],
1732                                                              file_parent=>$from->{'file'}[$i],
1733                                                              hash=>$diffinfo->{'to_id'},
1734                                                              hash_base=>$hash,
1735                                                              file_name=>$to->{'file'}),
1736                                                  -class=>"path",
1737                                                  -title=>"diff" . ($i+1)},
1738                                                 $i+1) .
1739                                         '/' .
1740                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1741                                                 esc_path($from->{'file'}[$i]));
1742                         } else {
1743                                 $line = '--- /dev/null';
1744                         }
1745                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1746                 }
1747         }
1748
1749         $line = $to_line;
1750         #assert($line =~ m/^\+\+\+/) if DEBUG;
1751         # no extra formatting for "^+++ /dev/null"
1752         if ($line =~ m!^\+\+\+ "?b/!) {
1753                 if ($to->{'href'}) {
1754                         $line = '+++ b/' .
1755                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1756                                         esc_path($to->{'file'}));
1757                 } else {
1758                         $line = '+++ b/' .
1759                                 esc_path($to->{'file'});
1760                 }
1761         }
1762         $result .= qq!<div class="diff to_file">$line</div>\n!;
1763
1764         return $result;
1765 }
1766
1767 # create note for patch simplified by combined diff
1768 sub format_diff_cc_simplified {
1769         my ($diffinfo, @parents) = @_;
1770         my $result = '';
1771
1772         $result .= "<div class=\"diff header\">" .
1773                    "diff --cc ";
1774         if (!is_deleted($diffinfo)) {
1775                 $result .= $cgi->a({-href => href(action=>"blob",
1776                                                   hash_base=>$hash,
1777                                                   hash=>$diffinfo->{'to_id'},
1778                                                   file_name=>$diffinfo->{'to_file'}),
1779                                     -class => "path"},
1780                                    esc_path($diffinfo->{'to_file'}));
1781         } else {
1782                 $result .= esc_path($diffinfo->{'to_file'});
1783         }
1784         $result .= "</div>\n" . # class="diff header"
1785                    "<div class=\"diff nodifferences\">" .
1786                    "Simple merge" .
1787                    "</div>\n"; # class="diff nodifferences"
1788
1789         return $result;
1790 }
1791
1792 # format patch (diff) line (not to be used for diff headers)
1793 sub format_diff_line {
1794         my $line = shift;
1795         my ($from, $to) = @_;
1796         my $diff_class = "";
1797
1798         chomp $line;
1799
1800         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1801                 # combined diff
1802                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1803                 if ($line =~ m/^\@{3}/) {
1804                         $diff_class = " chunk_header";
1805                 } elsif ($line =~ m/^\\/) {
1806                         $diff_class = " incomplete";
1807                 } elsif ($prefix =~ tr/+/+/) {
1808                         $diff_class = " add";
1809                 } elsif ($prefix =~ tr/-/-/) {
1810                         $diff_class = " rem";
1811                 }
1812         } else {
1813                 # assume ordinary diff
1814                 my $char = substr($line, 0, 1);
1815                 if ($char eq '+') {
1816                         $diff_class = " add";
1817                 } elsif ($char eq '-') {
1818                         $diff_class = " rem";
1819                 } elsif ($char eq '@') {
1820                         $diff_class = " chunk_header";
1821                 } elsif ($char eq "\\") {
1822                         $diff_class = " incomplete";
1823                 }
1824         }
1825         $line = untabify($line);
1826         if ($from && $to && $line =~ m/^\@{2} /) {
1827                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1828                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1829
1830                 $from_lines = 0 unless defined $from_lines;
1831                 $to_lines   = 0 unless defined $to_lines;
1832
1833                 if ($from->{'href'}) {
1834                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1835                                              -class=>"list"}, $from_text);
1836                 }
1837                 if ($to->{'href'}) {
1838                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1839                                              -class=>"list"}, $to_text);
1840                 }
1841                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1842                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1843                 return "<div class=\"diff$diff_class\">$line</div>\n";
1844         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1845                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1846                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1847
1848                 @from_text = split(' ', $ranges);
1849                 for (my $i = 0; $i < @from_text; ++$i) {
1850                         ($from_start[$i], $from_nlines[$i]) =
1851                                 (split(',', substr($from_text[$i], 1)), 0);
1852                 }
1853
1854                 $to_text   = pop @from_text;
1855                 $to_start  = pop @from_start;
1856                 $to_nlines = pop @from_nlines;
1857
1858                 $line = "<span class=\"chunk_info\">$prefix ";
1859                 for (my $i = 0; $i < @from_text; ++$i) {
1860                         if ($from->{'href'}[$i]) {
1861                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1862                                                   -class=>"list"}, $from_text[$i]);
1863                         } else {
1864                                 $line .= $from_text[$i];
1865                         }
1866                         $line .= " ";
1867                 }
1868                 if ($to->{'href'}) {
1869                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1870                                           -class=>"list"}, $to_text);
1871                 } else {
1872                         $line .= $to_text;
1873                 }
1874                 $line .= " $prefix</span>" .
1875                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1876                 return "<div class=\"diff$diff_class\">$line</div>\n";
1877         }
1878         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1879 }
1880
1881 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1882 # linked.  Pass the hash of the tree/commit to snapshot.
1883 sub format_snapshot_links {
1884         my ($hash) = @_;
1885         my $num_fmts = @snapshot_fmts;
1886         if ($num_fmts > 1) {
1887                 # A parenthesized list of links bearing format names.
1888                 # e.g. "snapshot (_tar.gz_ _zip_)"
1889                 return "snapshot (" . join(' ', map
1890                         $cgi->a({
1891                                 -href => href(
1892                                         action=>"snapshot",
1893                                         hash=>$hash,
1894                                         snapshot_format=>$_
1895                                 )
1896                         }, $known_snapshot_formats{$_}{'display'})
1897                 , @snapshot_fmts) . ")";
1898         } elsif ($num_fmts == 1) {
1899                 # A single "snapshot" link whose tooltip bears the format name.
1900                 # i.e. "_snapshot_"
1901                 my ($fmt) = @snapshot_fmts;
1902                 return
1903                         $cgi->a({
1904                                 -href => href(
1905                                         action=>"snapshot",
1906                                         hash=>$hash,
1907                                         snapshot_format=>$fmt
1908                                 ),
1909                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1910                         }, "snapshot");
1911         } else { # $num_fmts == 0
1912                 return undef;
1913         }
1914 }
1915
1916 ## ......................................................................
1917 ## functions returning values to be passed, perhaps after some
1918 ## transformation, to other functions; e.g. returning arguments to href()
1919
1920 # returns hash to be passed to href to generate gitweb URL
1921 # in -title key it returns description of link
1922 sub get_feed_info {
1923         my $format = shift || 'Atom';
1924         my %res = (action => lc($format));
1925
1926         # feed links are possible only for project views
1927         return unless (defined $project);
1928         # some views should link to OPML, or to generic project feed,
1929         # or don't have specific feed yet (so they should use generic)
1930         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1931
1932         my $branch;
1933         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1934         # from tag links; this also makes possible to detect branch links
1935         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1936             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1937                 $branch = $1;
1938         }
1939         # find log type for feed description (title)
1940         my $type = 'log';
1941         if (defined $file_name) {
1942                 $type  = "history of $file_name";
1943                 $type .= "/" if ($action eq 'tree');
1944                 $type .= " on '$branch'" if (defined $branch);
1945         } else {
1946                 $type = "log of $branch" if (defined $branch);
1947         }
1948
1949         $res{-title} = $type;
1950         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1951         $res{'file_name'} = $file_name;
1952
1953         return %res;
1954 }
1955
1956 ## ----------------------------------------------------------------------
1957 ## git utility subroutines, invoking git commands
1958
1959 # returns path to the core git executable and the --git-dir parameter as list
1960 sub git_cmd {
1961         return $GIT, '--git-dir='.$git_dir;
1962 }
1963
1964 # quote the given arguments for passing them to the shell
1965 # quote_command("command", "arg 1", "arg with ' and ! characters")
1966 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1967 # Try to avoid using this function wherever possible.
1968 sub quote_command {
1969         return join(' ',
1970                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1971 }
1972
1973 # get HEAD ref of given project as hash
1974 sub git_get_head_hash {
1975         my $project = shift;
1976         my $o_git_dir = $git_dir;
1977         my $retval = undef;
1978         $git_dir = "$projectroot/$project";
1979         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1980                 my $head = <$fd>;
1981                 close $fd;
1982                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1983                         $retval = $1;
1984                 }
1985         }
1986         if (defined $o_git_dir) {
1987                 $git_dir = $o_git_dir;
1988         }
1989         return $retval;
1990 }
1991
1992 # get type of given object
1993 sub git_get_type {
1994         my $hash = shift;
1995
1996         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1997         my $type = <$fd>;
1998         close $fd or return;
1999         chomp $type;
2000         return $type;
2001 }
2002
2003 # repository configuration
2004 our $config_file = '';
2005 our %config;
2006
2007 # store multiple values for single key as anonymous array reference
2008 # single values stored directly in the hash, not as [ <value> ]
2009 sub hash_set_multi {
2010         my ($hash, $key, $value) = @_;
2011
2012         if (!exists $hash->{$key}) {
2013                 $hash->{$key} = $value;
2014         } elsif (!ref $hash->{$key}) {
2015                 $hash->{$key} = [ $hash->{$key}, $value ];
2016         } else {
2017                 push @{$hash->{$key}}, $value;
2018         }
2019 }
2020
2021 # return hash of git project configuration
2022 # optionally limited to some section, e.g. 'gitweb'
2023 sub git_parse_project_config {
2024         my $section_regexp = shift;
2025         my %config;
2026
2027         local $/ = "\0";
2028
2029         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2030                 or return;
2031
2032         while (my $keyval = <$fh>) {
2033                 chomp $keyval;
2034                 my ($key, $value) = split(/\n/, $keyval, 2);
2035
2036                 hash_set_multi(\%config, $key, $value)
2037                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2038         }
2039         close $fh;
2040
2041         return %config;
2042 }
2043
2044 # convert config value to boolean: 'true' or 'false'
2045 # no value, number > 0, 'true' and 'yes' values are true
2046 # rest of values are treated as false (never as error)
2047 sub config_to_bool {
2048         my $val = shift;
2049
2050         return 1 if !defined $val;             # section.key
2051
2052         # strip leading and trailing whitespace
2053         $val =~ s/^\s+//;
2054         $val =~ s/\s+$//;
2055
2056         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2057                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2058 }
2059
2060 # convert config value to simple decimal number
2061 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2062 # to be multiplied by 1024, 1048576, or 1073741824
2063 sub config_to_int {
2064         my $val = shift;
2065
2066         # strip leading and trailing whitespace
2067         $val =~ s/^\s+//;
2068         $val =~ s/\s+$//;
2069
2070         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2071                 $unit = lc($unit);
2072                 # unknown unit is treated as 1
2073                 return $num * ($unit eq 'g' ? 1073741824 :
2074                                $unit eq 'm' ?    1048576 :
2075                                $unit eq 'k' ?       1024 : 1);
2076         }
2077         return $val;
2078 }
2079
2080 # convert config value to array reference, if needed
2081 sub config_to_multi {
2082         my $val = shift;
2083
2084         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2085 }
2086
2087 sub git_get_project_config {
2088         my ($key, $type) = @_;
2089
2090         # key sanity check
2091         return unless ($key);
2092         $key =~ s/^gitweb\.//;
2093         return if ($key =~ m/\W/);
2094
2095         # type sanity check
2096         if (defined $type) {
2097                 $type =~ s/^--//;
2098                 $type = undef
2099                         unless ($type eq 'bool' || $type eq 'int');
2100         }
2101
2102         # get config
2103         if (!defined $config_file ||
2104             $config_file ne "$git_dir/config") {
2105                 %config = git_parse_project_config('gitweb');
2106                 $config_file = "$git_dir/config";
2107         }
2108
2109         # check if config variable (key) exists
2110         return unless exists $config{"gitweb.$key"};
2111
2112         # ensure given type
2113         if (!defined $type) {
2114                 return $config{"gitweb.$key"};
2115         } elsif ($type eq 'bool') {
2116                 # backward compatibility: 'git config --bool' returns true/false
2117                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2118         } elsif ($type eq 'int') {
2119                 return config_to_int($config{"gitweb.$key"});
2120         }
2121         return $config{"gitweb.$key"};
2122 }
2123
2124 # get hash of given path at given ref
2125 sub git_get_hash_by_path {
2126         my $base = shift;
2127         my $path = shift || return undef;
2128         my $type = shift;
2129
2130         $path =~ s,/+$,,;
2131
2132         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2133                 or die_error(500, "Open git-ls-tree failed");
2134         my $line = <$fd>;
2135         close $fd or return undef;
2136
2137         if (!defined $line) {
2138                 # there is no tree or hash given by $path at $base
2139                 return undef;
2140         }
2141
2142         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2143         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2144         if (defined $type && $type ne $2) {
2145                 # type doesn't match
2146                 return undef;
2147         }
2148         return $3;
2149 }
2150
2151 # get path of entry with given hash at given tree-ish (ref)
2152 # used to get 'from' filename for combined diff (merge commit) for renames
2153 sub git_get_path_by_hash {
2154         my $base = shift || return;
2155         my $hash = shift || return;
2156
2157         local $/ = "\0";
2158
2159         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2160                 or return undef;
2161         while (my $line = <$fd>) {
2162                 chomp $line;
2163
2164                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2165                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2166                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2167                         close $fd;
2168                         return $1;
2169                 }
2170         }
2171         close $fd;
2172         return undef;
2173 }
2174
2175 ## ......................................................................
2176 ## git utility functions, directly accessing git repository
2177
2178 sub git_get_project_description {
2179         my $path = shift;
2180
2181         $git_dir = "$projectroot/$path";
2182         open my $fd, '<', "$git_dir/description"
2183                 or return git_get_project_config('description');
2184         my $descr = <$fd>;
2185         close $fd;
2186         if (defined $descr) {
2187                 chomp $descr;
2188         }
2189         return $descr;
2190 }
2191
2192 sub git_get_project_ctags {
2193         my $path = shift;
2194         my $ctags = {};
2195
2196         $git_dir = "$projectroot/$path";
2197         opendir my $dh, "$git_dir/ctags"
2198                 or return $ctags;
2199         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2200                 open my $ct, '<', $_ or next;
2201                 my $val = <$ct>;
2202                 chomp $val;
2203                 close $ct;
2204                 my $ctag = $_; $ctag =~ s#.*/##;
2205                 $ctags->{$ctag} = $val;
2206         }
2207         closedir $dh;
2208         $ctags;
2209 }
2210
2211 sub git_populate_project_tagcloud {
2212         my $ctags = shift;
2213
2214         # First, merge different-cased tags; tags vote on casing
2215         my %ctags_lc;
2216         foreach (keys %$ctags) {
2217                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2218                 if (not $ctags_lc{lc $_}->{topcount}
2219                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2220                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2221                         $ctags_lc{lc $_}->{topname} = $_;
2222                 }
2223         }
2224
2225         my $cloud;
2226         if (eval { require HTML::TagCloud; 1; }) {
2227                 $cloud = HTML::TagCloud->new;
2228                 foreach (sort keys %ctags_lc) {
2229                         # Pad the title with spaces so that the cloud looks
2230                         # less crammed.
2231                         my $title = $ctags_lc{$_}->{topname};
2232                         $title =~ s/ /&nbsp;/g;
2233                         $title =~ s/^/&nbsp;/g;
2234                         $title =~ s/$/&nbsp;/g;
2235                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2236                 }
2237         } else {
2238                 $cloud = \%ctags_lc;
2239         }
2240         $cloud;
2241 }
2242
2243 sub git_show_project_tagcloud {
2244         my ($cloud, $count) = @_;
2245         print STDERR ref($cloud)."..\n";
2246         if (ref $cloud eq 'HTML::TagCloud') {
2247                 return $cloud->html_and_css($count);
2248         } else {
2249                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2250                 return '<p align="center">' . join (', ', map {
2251                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2252                 } splice(@tags, 0, $count)) . '</p>';
2253         }
2254 }
2255
2256 sub git_get_project_url_list {
2257         my $path = shift;
2258
2259         $git_dir = "$projectroot/$path";
2260         open my $fd, '<', "$git_dir/cloneurl"
2261                 or return wantarray ?
2262                 @{ config_to_multi(git_get_project_config('url')) } :
2263                    config_to_multi(git_get_project_config('url'));
2264         my @git_project_url_list = map { chomp; $_ } <$fd>;
2265         close $fd;
2266
2267         return wantarray ? @git_project_url_list : \@git_project_url_list;
2268 }
2269
2270 sub git_get_projects_list {
2271         my ($filter) = @_;
2272         my @list;
2273
2274         $filter ||= '';
2275         $filter =~ s/\.git$//;
2276
2277         my $check_forks = gitweb_check_feature('forks');
2278
2279         if (-d $projects_list) {
2280                 # search in directory
2281                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2282                 # remove the trailing "/"
2283                 $dir =~ s!/+$!!;
2284                 my $pfxlen = length("$dir");
2285                 my $pfxdepth = ($dir =~ tr!/!!);
2286
2287                 File::Find::find({
2288                         follow_fast => 1, # follow symbolic links
2289                         follow_skip => 2, # ignore duplicates
2290                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2291                         wanted => sub {
2292                                 # skip project-list toplevel, if we get it.
2293                                 return if (m!^[/.]$!);
2294                                 # only directories can be git repositories
2295                                 return unless (-d $_);
2296                                 # don't traverse too deep (Find is super slow on os x)
2297                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2298                                         $File::Find::prune = 1;
2299                                         return;
2300                                 }
2301
2302                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2303                                 # we check related file in $projectroot
2304                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2305                                 if (check_export_ok("$projectroot/$path")) {
2306                                         push @list, { path => $path };
2307                                         $File::Find::prune = 1;
2308                                 }
2309                         },
2310                 }, "$dir");
2311
2312         } elsif (-f $projects_list) {
2313                 # read from file(url-encoded):
2314                 # 'git%2Fgit.git Linus+Torvalds'
2315                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2316                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2317                 my %paths;
2318                 open my $fd, '<', $projects_list or return;
2319         PROJECT:
2320                 while (my $line = <$fd>) {
2321                         chomp $line;
2322                         my ($path, $owner) = split ' ', $line;
2323                         $path = unescape($path);
2324                         $owner = unescape($owner);
2325                         if (!defined $path) {
2326                                 next;
2327                         }
2328                         if ($filter ne '') {
2329                                 # looking for forks;
2330                                 my $pfx = substr($path, 0, length($filter));
2331                                 if ($pfx ne $filter) {
2332                                         next PROJECT;
2333                                 }
2334                                 my $sfx = substr($path, length($filter));
2335                                 if ($sfx !~ /^\/.*\.git$/) {
2336                                         next PROJECT;
2337                                 }
2338                         } elsif ($check_forks) {
2339                         PATH:
2340                                 foreach my $filter (keys %paths) {
2341                                         # looking for forks;
2342                                         my $pfx = substr($path, 0, length($filter));
2343                                         if ($pfx ne $filter) {
2344                                                 next PATH;
2345                                         }
2346                                         my $sfx = substr($path, length($filter));
2347                                         if ($sfx !~ /^\/.*\.git$/) {
2348                                                 next PATH;
2349                                         }
2350                                         # is a fork, don't include it in
2351                                         # the list
2352                                         next PROJECT;
2353                                 }
2354                         }
2355                         if (check_export_ok("$projectroot/$path")) {
2356                                 my $pr = {
2357                                         path => $path,
2358                                         owner => to_utf8($owner),
2359                                 };
2360                                 push @list, $pr;
2361                                 (my $forks_path = $path) =~ s/\.git$//;
2362                                 $paths{$forks_path}++;
2363                         }
2364                 }
2365                 close $fd;
2366         }
2367         return @list;
2368 }
2369
2370 our $gitweb_project_owner = undef;
2371 sub git_get_project_list_from_file {
2372
2373         return if (defined $gitweb_project_owner);
2374
2375         $gitweb_project_owner = {};
2376         # read from file (url-encoded):
2377         # 'git%2Fgit.git Linus+Torvalds'
2378         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2379         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2380         if (-f $projects_list) {
2381                 open(my $fd, '<', $projects_list);
2382                 while (my $line = <$fd>) {
2383                         chomp $line;
2384                         my ($pr, $ow) = split ' ', $line;
2385                         $pr = unescape($pr);
2386                         $ow = unescape($ow);
2387                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2388                 }
2389                 close $fd;
2390         }
2391 }
2392
2393 sub git_get_project_owner {
2394         my $project = shift;
2395         my $owner;
2396
2397         return undef unless $project;
2398         $git_dir = "$projectroot/$project";
2399
2400         if (!defined $gitweb_project_owner) {
2401                 git_get_project_list_from_file();
2402         }
2403
2404         if (exists $gitweb_project_owner->{$project}) {
2405                 $owner = $gitweb_project_owner->{$project};
2406         }
2407         if (!defined $owner){
2408                 $owner = git_get_project_config('owner');
2409         }
2410         if (!defined $owner) {
2411                 $owner = get_file_owner("$git_dir");
2412         }
2413
2414         return $owner;
2415 }
2416
2417 sub git_get_last_activity {
2418         my ($path) = @_;
2419         my $fd;
2420
2421         $git_dir = "$projectroot/$path";
2422         open($fd, "-|", git_cmd(), 'for-each-ref',
2423              '--format=%(committer)',
2424              '--sort=-committerdate',
2425              '--count=1',
2426              'refs/heads') or return;
2427         my $most_recent = <$fd>;
2428         close $fd or return;
2429         if (defined $most_recent &&
2430             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2431                 my $timestamp = $1;
2432                 my $age = time - $timestamp;
2433                 return ($age, age_string($age));
2434         }
2435         return (undef, undef);
2436 }
2437
2438 sub git_get_references {
2439         my $type = shift || "";
2440         my %refs;
2441         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2442         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2443         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2444                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2445                 or return;
2446
2447         while (my $line = <$fd>) {
2448                 chomp $line;
2449                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2450                         if (defined $refs{$1}) {
2451                                 push @{$refs{$1}}, $2;
2452                         } else {
2453                                 $refs{$1} = [ $2 ];
2454                         }
2455                 }
2456         }
2457         close $fd or return;
2458         return \%refs;
2459 }
2460
2461 sub git_get_rev_name_tags {
2462         my $hash = shift || return undef;
2463
2464         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2465                 or return;
2466         my $name_rev = <$fd>;
2467         close $fd;
2468
2469         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2470                 return $1;
2471         } else {
2472                 # catches also '$hash undefined' output
2473                 return undef;
2474         }
2475 }
2476
2477 ## ----------------------------------------------------------------------
2478 ## parse to hash functions
2479
2480 sub parse_date {
2481         my $epoch = shift;
2482         my $tz = shift || "-0000";
2483
2484         my %date;
2485         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2486         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2487         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2488         $date{'hour'} = $hour;
2489         $date{'minute'} = $min;
2490         $date{'mday'} = $mday;
2491         $date{'day'} = $days[$wday];
2492         $date{'month'} = $months[$mon];
2493         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2494                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2495         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2496                              $mday, $months[$mon], $hour ,$min;
2497         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2498                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2499
2500         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2501         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2502         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2503         $date{'hour_local'} = $hour;
2504         $date{'minute_local'} = $min;
2505         $date{'tz_local'} = $tz;
2506         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2507                                   1900+$year, $mon+1, $mday,
2508                                   $hour, $min, $sec, $tz);
2509         return %date;
2510 }
2511
2512 sub parse_tag {
2513         my $tag_id = shift;
2514         my %tag;
2515         my @comment;
2516
2517         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2518         $tag{'id'} = $tag_id;
2519         while (my $line = <$fd>) {
2520                 chomp $line;
2521                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2522                         $tag{'object'} = $1;
2523                 } elsif ($line =~ m/^type (.+)$/) {
2524                         $tag{'type'} = $1;
2525                 } elsif ($line =~ m/^tag (.+)$/) {
2526                         $tag{'name'} = $1;
2527                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2528                         $tag{'author'} = $1;
2529                         $tag{'author_epoch'} = $2;
2530                         $tag{'author_tz'} = $3;
2531                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2532                                 $tag{'author_name'}  = $1;
2533                                 $tag{'author_email'} = $2;
2534                         } else {
2535                                 $tag{'author_name'} = $tag{'author'};
2536                         }
2537                 } elsif ($line =~ m/--BEGIN/) {
2538                         push @comment, $line;
2539                         last;
2540                 } elsif ($line eq "") {
2541                         last;
2542                 }
2543         }
2544         push @comment, <$fd>;
2545         $tag{'comment'} = \@comment;
2546         close $fd or return;
2547         if (!defined $tag{'name'}) {
2548                 return
2549         };
2550         return %tag
2551 }
2552
2553 sub parse_commit_text {
2554         my ($commit_text, $withparents) = @_;
2555         my @commit_lines = split '\n', $commit_text;
2556         my %co;
2557
2558         pop @commit_lines; # Remove '\0'
2559
2560         if (! @commit_lines) {
2561                 return;
2562         }
2563
2564         my $header = shift @commit_lines;
2565         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2566                 return;
2567         }
2568         ($co{'id'}, my @parents) = split ' ', $header;
2569         while (my $line = shift @commit_lines) {
2570                 last if $line eq "\n";
2571                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2572                         $co{'tree'} = $1;
2573                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2574                         push @parents, $1;
2575                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2576                         $co{'author'} = to_utf8($1);
2577                         $co{'author_epoch'} = $2;
2578                         $co{'author_tz'} = $3;
2579                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2580                                 $co{'author_name'}  = $1;
2581                                 $co{'author_email'} = $2;
2582                         } else {
2583                                 $co{'author_name'} = $co{'author'};
2584                         }
2585                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2586                         $co{'committer'} = to_utf8($1);
2587                         $co{'committer_epoch'} = $2;
2588                         $co{'committer_tz'} = $3;
2589                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2590                                 $co{'committer_name'}  = $1;
2591                                 $co{'committer_email'} = $2;
2592                         } else {
2593                                 $co{'committer_name'} = $co{'committer'};
2594                         }
2595                 }
2596         }
2597         if (!defined $co{'tree'}) {
2598                 return;
2599         };
2600         $co{'parents'} = \@parents;
2601         $co{'parent'} = $parents[0];
2602
2603         foreach my $title (@commit_lines) {
2604                 $title =~ s/^    //;
2605                 if ($title ne "") {
2606                         $co{'title'} = chop_str($title, 80, 5);
2607                         # remove leading stuff of merges to make the interesting part visible
2608                         if (length($title) > 50) {
2609                                 $title =~ s/^Automatic //;
2610                                 $title =~ s/^merge (of|with) /Merge ... /i;
2611                                 if (length($title) > 50) {
2612                                         $title =~ s/(http|rsync):\/\///;
2613                                 }
2614                                 if (length($title) > 50) {
2615                                         $title =~ s/(master|www|rsync)\.//;
2616                                 }
2617                                 if (length($title) > 50) {
2618                                         $title =~ s/kernel.org:?//;
2619                                 }
2620                                 if (length($title) > 50) {
2621                                         $title =~ s/\/pub\/scm//;
2622                                 }
2623                         }
2624                         $co{'title_short'} = chop_str($title, 50, 5);
2625                         last;
2626                 }
2627         }
2628         if (! defined $co{'title'} || $co{'title'} eq "") {
2629                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2630         }
2631         # remove added spaces
2632         foreach my $line (@commit_lines) {
2633                 $line =~ s/^    //;
2634         }
2635         $co{'comment'} = \@commit_lines;
2636
2637         my $age = time - $co{'committer_epoch'};
2638         $co{'age'} = $age;
2639         $co{'age_string'} = age_string($age);
2640         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2641         if ($age > 60*60*24*7*2) {
2642                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2643                 $co{'age_string_age'} = $co{'age_string'};
2644         } else {
2645                 $co{'age_string_date'} = $co{'age_string'};
2646                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2647         }
2648         return %co;
2649 }
2650
2651 sub parse_commit {
2652         my ($commit_id) = @_;
2653         my %co;
2654
2655         local $/ = "\0";
2656
2657         open my $fd, "-|", git_cmd(), "rev-list",
2658                 "--parents",
2659                 "--header",
2660                 "--max-count=1",
2661                 $commit_id,
2662                 "--",
2663                 or die_error(500, "Open git-rev-list failed");
2664         %co = parse_commit_text(<$fd>, 1);
2665         close $fd;
2666
2667         return %co;
2668 }
2669
2670 sub parse_commits {
2671         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2672         my @cos;
2673
2674         $maxcount ||= 1;
2675         $skip ||= 0;
2676
2677         local $/ = "\0";
2678
2679         open my $fd, "-|", git_cmd(), "rev-list",
2680                 "--header",
2681                 @args,
2682                 ("--max-count=" . $maxcount),
2683                 ("--skip=" . $skip),
2684                 @extra_options,
2685                 $commit_id,
2686                 "--",
2687                 ($filename ? ($filename) : ())
2688                 or die_error(500, "Open git-rev-list failed");
2689         while (my $line = <$fd>) {
2690                 my %co = parse_commit_text($line);
2691                 push @cos, \%co;
2692         }
2693         close $fd;
2694
2695         return wantarray ? @cos : \@cos;
2696 }
2697
2698 # parse line of git-diff-tree "raw" output
2699 sub parse_difftree_raw_line {
2700         my $line = shift;
2701         my %res;
2702
2703         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2704         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2705         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2706                 $res{'from_mode'} = $1;
2707                 $res{'to_mode'} = $2;
2708                 $res{'from_id'} = $3;
2709                 $res{'to_id'} = $4;
2710                 $res{'status'} = $5;
2711                 $res{'similarity'} = $6;
2712                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2713                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2714                 } else {
2715                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2716                 }
2717         }
2718         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2719         # combined diff (for merge commit)
2720         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2721                 $res{'nparents'}  = length($1);
2722                 $res{'from_mode'} = [ split(' ', $2) ];
2723                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2724                 $res{'from_id'} = [ split(' ', $3) ];
2725                 $res{'to_id'} = pop @{$res{'from_id'}};
2726                 $res{'status'} = [ split('', $4) ];
2727                 $res{'to_file'} = unquote($5);
2728         }
2729         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2730         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2731                 $res{'commit'} = $1;
2732         }
2733
2734         return wantarray ? %res : \%res;
2735 }
2736
2737 # wrapper: return parsed line of git-diff-tree "raw" output
2738 # (the argument might be raw line, or parsed info)
2739 sub parsed_difftree_line {
2740         my $line_or_ref = shift;
2741
2742         if (ref($line_or_ref) eq "HASH") {
2743                 # pre-parsed (or generated by hand)
2744                 return $line_or_ref;
2745         } else {
2746                 return parse_difftree_raw_line($line_or_ref);
2747         }
2748 }
2749
2750 # parse line of git-ls-tree output
2751 sub parse_ls_tree_line {
2752         my $line = shift;
2753         my %opts = @_;
2754         my %res;
2755
2756         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2757         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2758
2759         $res{'mode'} = $1;
2760         $res{'type'} = $2;
2761         $res{'hash'} = $3;
2762         if ($opts{'-z'}) {
2763                 $res{'name'} = $4;
2764         } else {
2765                 $res{'name'} = unquote($4);
2766         }
2767
2768         return wantarray ? %res : \%res;
2769 }
2770
2771 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2772 sub parse_from_to_diffinfo {
2773         my ($diffinfo, $from, $to, @parents) = @_;
2774
2775         if ($diffinfo->{'nparents'}) {
2776                 # combined diff
2777                 $from->{'file'} = [];
2778                 $from->{'href'} = [];
2779                 fill_from_file_info($diffinfo, @parents)
2780                         unless exists $diffinfo->{'from_file'};
2781                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2782                         $from->{'file'}[$i] =
2783                                 defined $diffinfo->{'from_file'}[$i] ?
2784                                         $diffinfo->{'from_file'}[$i] :
2785                                         $diffinfo->{'to_file'};
2786                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2787                                 $from->{'href'}[$i] = href(action=>"blob",
2788                                                            hash_base=>$parents[$i],
2789                                                            hash=>$diffinfo->{'from_id'}[$i],
2790                                                            file_name=>$from->{'file'}[$i]);
2791                         } else {
2792                                 $from->{'href'}[$i] = undef;
2793                         }
2794                 }
2795         } else {
2796                 # ordinary (not combined) diff
2797                 $from->{'file'} = $diffinfo->{'from_file'};
2798                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2799                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2800                                                hash=>$diffinfo->{'from_id'},
2801                                                file_name=>$from->{'file'});
2802                 } else {
2803                         delete $from->{'href'};
2804                 }
2805         }
2806
2807         $to->{'file'} = $diffinfo->{'to_file'};
2808         if (!is_deleted($diffinfo)) { # file exists in result
2809                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2810                                      hash=>$diffinfo->{'to_id'},
2811                                      file_name=>$to->{'file'});
2812         } else {
2813                 delete $to->{'href'};
2814         }
2815 }
2816
2817 ## ......................................................................
2818 ## parse to array of hashes functions
2819
2820 sub git_get_heads_list {
2821         my $limit = shift;
2822         my @headslist;
2823
2824         open my $fd, '-|', git_cmd(), 'for-each-ref',
2825                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2826                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2827                 'refs/heads'
2828                 or return;
2829         while (my $line = <$fd>) {
2830                 my %ref_item;
2831
2832                 chomp $line;
2833                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2834                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2835                 my ($committer, $epoch, $tz) =
2836                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2837                 $ref_item{'fullname'}  = $name;
2838                 $name =~ s!^refs/heads/!!;
2839
2840                 $ref_item{'name'}  = $name;
2841                 $ref_item{'id'}    = $hash;
2842                 $ref_item{'title'} = $title || '(no commit message)';
2843                 $ref_item{'epoch'} = $epoch;
2844                 if ($epoch) {
2845                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2846                 } else {
2847                         $ref_item{'age'} = "unknown";
2848                 }
2849
2850                 push @headslist, \%ref_item;
2851         }
2852         close $fd;
2853
2854         return wantarray ? @headslist : \@headslist;
2855 }
2856
2857 sub git_get_tags_list {
2858         my $limit = shift;
2859         my @tagslist;
2860
2861         open my $fd, '-|', git_cmd(), 'for-each-ref',
2862                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2863                 '--format=%(objectname) %(objecttype) %(refname) '.
2864                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2865                 'refs/tags'
2866                 or return;
2867         while (my $line = <$fd>) {
2868                 my %ref_item;
2869
2870                 chomp $line;
2871                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2872                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2873                 my ($creator, $epoch, $tz) =
2874                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2875                 $ref_item{'fullname'} = $name;
2876                 $name =~ s!^refs/tags/!!;
2877
2878                 $ref_item{'type'} = $type;
2879                 $ref_item{'id'} = $id;
2880                 $ref_item{'name'} = $name;
2881                 if ($type eq "tag") {
2882                         $ref_item{'subject'} = $title;
2883                         $ref_item{'reftype'} = $reftype;
2884                         $ref_item{'refid'}   = $refid;
2885                 } else {
2886                         $ref_item{'reftype'} = $type;
2887                         $ref_item{'refid'}   = $id;
2888                 }
2889
2890                 if ($type eq "tag" || $type eq "commit") {
2891                         $ref_item{'epoch'} = $epoch;
2892                         if ($epoch) {
2893                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2894                         } else {
2895                                 $ref_item{'age'} = "unknown";
2896                         }
2897                 }
2898
2899                 push @tagslist, \%ref_item;
2900         }
2901         close $fd;
2902
2903         return wantarray ? @tagslist : \@tagslist;
2904 }
2905
2906 ## ----------------------------------------------------------------------
2907 ## filesystem-related functions
2908
2909 sub get_file_owner {
2910         my $path = shift;
2911
2912         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2913         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2914         if (!defined $gcos) {
2915                 return undef;
2916         }
2917         my $owner = $gcos;
2918         $owner =~ s/[,;].*$//;
2919         return to_utf8($owner);
2920 }
2921
2922 # assume that file exists
2923 sub insert_file {
2924         my $filename = shift;
2925
2926         open my $fd, '<', $filename;
2927         print map { to_utf8($_) } <$fd>;
2928         close $fd;
2929 }
2930
2931 ## ......................................................................
2932 ## mimetype related functions
2933
2934 sub mimetype_guess_file {
2935         my $filename = shift;
2936         my $mimemap = shift;
2937         -r $mimemap or return undef;
2938
2939         my %mimemap;
2940         open(my $mh, '<', $mimemap) or return undef;
2941         while (<$mh>) {
2942                 next if m/^#/; # skip comments
2943                 my ($mimetype, $exts) = split(/\t+/);
2944                 if (defined $exts) {
2945                         my @exts = split(/\s+/, $exts);
2946                         foreach my $ext (@exts) {
2947                                 $mimemap{$ext} = $mimetype;
2948                         }
2949                 }
2950         }
2951         close($mh);
2952
2953         $filename =~ /\.([^.]*)$/;
2954         return $mimemap{$1};
2955 }
2956
2957 sub mimetype_guess {
2958         my $filename = shift;
2959         my $mime;
2960         $filename =~ /\./ or return undef;
2961
2962         if ($mimetypes_file) {
2963                 my $file = $mimetypes_file;
2964                 if ($file !~ m!^/!) { # if it is relative path
2965                         # it is relative to project
2966                         $file = "$projectroot/$project/$file";
2967                 }
2968                 $mime = mimetype_guess_file($filename, $file);
2969         }
2970         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2971         return $mime;
2972 }
2973
2974 sub blob_mimetype {
2975         my $fd = shift;
2976         my $filename = shift;
2977
2978         if ($filename) {
2979                 my $mime = mimetype_guess($filename);
2980                 $mime and return $mime;
2981         }
2982
2983         # just in case
2984         return $default_blob_plain_mimetype unless $fd;
2985
2986         if (-T $fd) {
2987                 return 'text/plain';
2988         } elsif (! $filename) {
2989                 return 'application/octet-stream';
2990         } elsif ($filename =~ m/\.png$/i) {
2991                 return 'image/png';
2992         } elsif ($filename =~ m/\.gif$/i) {
2993                 return 'image/gif';
2994         } elsif ($filename =~ m/\.jpe?g$/i) {
2995                 return 'image/jpeg';
2996         } else {
2997                 return 'application/octet-stream';
2998         }
2999 }
3000
3001 sub blob_contenttype {
3002         my ($fd, $file_name, $type) = @_;
3003
3004         $type ||= blob_mimetype($fd, $file_name);
3005         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3006                 $type .= "; charset=$default_text_plain_charset";
3007         }
3008
3009         return $type;
3010 }
3011
3012 ## ======================================================================
3013 ## functions printing HTML: header, footer, error page
3014
3015 sub git_header_html {
3016         my $status = shift || "200 OK";
3017         my $expires = shift;
3018
3019         my $title = "$site_name";
3020         if (defined $project) {
3021                 $title .= " - " . to_utf8($project);
3022                 if (defined $action) {
3023                         $title .= "/$action";
3024                         if (defined $file_name) {
3025                                 $title .= " - " . esc_path($file_name);
3026                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3027                                         $title .= "/";
3028                                 }
3029                         }
3030                 }
3031         }
3032         my $content_type;
3033         # require explicit support from the UA if we are to send the page as
3034         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3035         # we have to do this because MSIE sometimes globs '*/*', pretending to
3036         # support xhtml+xml but choking when it gets what it asked for.
3037         if (defined $cgi->http('HTTP_ACCEPT') &&
3038             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3039             $cgi->Accept('application/xhtml+xml') != 0) {
3040                 $content_type = 'application/xhtml+xml';
3041         } else {
3042                 $content_type = 'text/html';
3043         }
3044         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3045                            -status=> $status, -expires => $expires);
3046         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3047         print <<EOF;
3048 <?xml version="1.0" encoding="utf-8"?>
3049 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3050 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3051 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3052 <!-- git core binaries version $git_version -->
3053 <head>
3054 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3055 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3056 <meta name="robots" content="index, nofollow"/>
3057 <title>$title</title>
3058 EOF
3059         # the stylesheet, favicon etc urls won't work correctly with path_info
3060         # unless we set the appropriate base URL
3061         if ($ENV{'PATH_INFO'}) {
3062                 print "<base href=\"".esc_url($base_url)."\" />\n";
3063         }
3064         # print out each stylesheet that exist, providing backwards capability
3065         # for those people who defined $stylesheet in a config file
3066         if (defined $stylesheet) {
3067                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3068         } else {
3069                 foreach my $stylesheet (@stylesheets) {
3070                         next unless $stylesheet;
3071                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3072                 }
3073         }
3074         if (defined $project) {
3075                 my %href_params = get_feed_info();
3076                 if (!exists $href_params{'-title'}) {
3077                         $href_params{'-title'} = 'log';
3078                 }
3079
3080                 foreach my $format qw(RSS Atom) {
3081                         my $type = lc($format);
3082                         my %link_attr = (
3083                                 '-rel' => 'alternate',
3084                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3085                                 '-type' => "application/$type+xml"
3086                         );
3087
3088                         $href_params{'action'} = $type;
3089                         $link_attr{'-href'} = href(%href_params);
3090                         print "<link ".
3091                               "rel=\"$link_attr{'-rel'}\" ".
3092                               "title=\"$link_attr{'-title'}\" ".
3093                               "href=\"$link_attr{'-href'}\" ".
3094                               "type=\"$link_attr{'-type'}\" ".
3095                               "/>\n";
3096
3097                         $href_params{'extra_options'} = '--no-merges';
3098                         $link_attr{'-href'} = href(%href_params);
3099                         $link_attr{'-title'} .= ' (no merges)';
3100                         print "<link ".
3101                               "rel=\"$link_attr{'-rel'}\" ".
3102                               "title=\"$link_attr{'-title'}\" ".
3103                               "href=\"$link_attr{'-href'}\" ".
3104                               "type=\"$link_attr{'-type'}\" ".
3105                               "/>\n";
3106                 }
3107
3108         } else {
3109                 printf('<link rel="alternate" title="%s projects list" '.
3110                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3111                        $site_name, href(project=>undef, action=>"project_index"));
3112                 printf('<link rel="alternate" title="%s projects feeds" '.
3113                        'href="%s" type="text/x-opml" />'."\n",
3114                        $site_name, href(project=>undef, action=>"opml"));
3115         }
3116         if (defined $favicon) {
3117                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3118         }
3119
3120         print "</head>\n" .
3121               "<body>\n";
3122
3123         if (-f $site_header) {
3124                 insert_file($site_header);
3125         }
3126
3127         print "<div class=\"page_header\">\n" .
3128               $cgi->a({-href => esc_url($logo_url),
3129                        -title => $logo_label},
3130                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3131         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3132         if (defined $project) {
3133                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3134                 if (defined $action) {
3135                         print " / $action";
3136                 }
3137                 print "\n";
3138         }
3139         print "</div>\n";
3140
3141         my $have_search = gitweb_check_feature('search');
3142         if (defined $project && $have_search) {
3143                 if (!defined $searchtext) {
3144                         $searchtext = "";
3145                 }
3146                 my $search_hash;
3147                 if (defined $hash_base) {
3148                         $search_hash = $hash_base;
3149                 } elsif (defined $hash) {
3150                         $search_hash = $hash;
3151                 } else {
3152                         $search_hash = "HEAD";
3153                 }
3154                 my $action = $my_uri;
3155                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3156                 if ($use_pathinfo) {
3157                         $action .= "/".esc_url($project);
3158                 }
3159                 print $cgi->startform(-method => "get", -action => $action) .
3160                       "<div class=\"search\">\n" .
3161                       (!$use_pathinfo &&
3162                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3163                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3164                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3165                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3166                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3167                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3168                       " search:\n",
3169                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3170                       "<span title=\"Extended regular expression\">" .
3171                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3172                                      -checked => $search_use_regexp) .
3173                       "</span>" .
3174                       "</div>" .
3175                       $cgi->end_form() . "\n";
3176         }
3177 }
3178
3179 sub git_footer_html {
3180         my $feed_class = 'rss_logo';
3181
3182         print "<div class=\"page_footer\">\n";
3183         if (defined $project) {
3184                 my $descr = git_get_project_description($project);
3185                 if (defined $descr) {
3186                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3187                 }
3188
3189                 my %href_params = get_feed_info();
3190                 if (!%href_params) {
3191                         $feed_class .= ' generic';
3192                 }
3193                 $href_params{'-title'} ||= 'log';
3194
3195                 foreach my $format qw(RSS Atom) {
3196                         $href_params{'action'} = lc($format);
3197                         print $cgi->a({-href => href(%href_params),
3198                                       -title => "$href_params{'-title'} $format feed",
3199                                       -class => $feed_class}, $format)."\n";
3200                 }
3201
3202         } else {
3203                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3204                               -class => $feed_class}, "OPML") . " ";
3205                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3206                               -class => $feed_class}, "TXT") . "\n";
3207         }
3208         print "</div>\n"; # class="page_footer"
3209
3210         if (-f $site_footer) {
3211                 insert_file($site_footer);
3212         }
3213
3214         print "</body>\n" .
3215               "</html>";
3216 }
3217
3218 # die_error(<http_status_code>, <error_message>)
3219 # Example: die_error(404, 'Hash not found')
3220 # By convention, use the following status codes (as defined in RFC 2616):
3221 # 400: Invalid or missing CGI parameters, or
3222 #      requested object exists but has wrong type.
3223 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3224 #      this server or project.
3225 # 404: Requested object/revision/project doesn't exist.
3226 # 500: The server isn't configured properly, or
3227 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3228 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3229 sub die_error {
3230         my $status = shift || 500;
3231         my $error = shift || "Internal server error";
3232
3233         my %http_responses = (400 => '400 Bad Request',
3234                               403 => '403 Forbidden',
3235                               404 => '404 Not Found',
3236                               500 => '500 Internal Server Error');
3237         git_header_html($http_responses{$status});
3238         print <<EOF;
3239 <div class="page_body">
3240 <br /><br />
3241 $status - $error
3242 <br />
3243 </div>
3244 EOF
3245         git_footer_html();
3246         exit;
3247 }
3248
3249 ## ----------------------------------------------------------------------
3250 ## functions printing or outputting HTML: navigation
3251
3252 sub git_print_page_nav {
3253         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3254         $extra = '' if !defined $extra; # pager or formats
3255
3256         my @navs = qw(summary shortlog log commit commitdiff tree);
3257         if ($suppress) {
3258                 @navs = grep { $_ ne $suppress } @navs;
3259         }
3260
3261         my %arg = map { $_ => {action=>$_} } @navs;
3262         if (defined $head) {
3263                 for (qw(commit commitdiff)) {
3264                         $arg{$_}{'hash'} = $head;
3265                 }
3266                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3267                         for (qw(shortlog log)) {
3268                                 $arg{$_}{'hash'} = $head;
3269                         }
3270                 }
3271         }
3272
3273         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3274         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3275
3276         my @actions = gitweb_get_feature('actions');
3277         my %repl = (
3278                 '%' => '%',
3279                 'n' => $project,         # project name
3280                 'f' => $git_dir,         # project path within filesystem
3281                 'h' => $treehead || '',  # current hash ('h' parameter)
3282                 'b' => $treebase || '',  # hash base ('hb' parameter)
3283         );
3284         while (@actions) {
3285                 my ($label, $link, $pos) = splice(@actions,0,3);
3286                 # insert
3287                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3288                 # munch munch
3289                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3290                 $arg{$label}{'_href'} = $link;
3291         }
3292
3293         print "<div class=\"page_nav\">\n" .
3294                 (join " | ",
3295                  map { $_ eq $current ?
3296                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3297                  } @navs);
3298         print "<br/>\n$extra<br/>\n" .
3299               "</div>\n";
3300 }
3301
3302 sub format_paging_nav {
3303         my ($action, $hash, $head, $page, $has_next_link) = @_;
3304         my $paging_nav;
3305
3306
3307         if ($hash ne $head || $page) {
3308                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3309         } else {
3310                 $paging_nav .= "HEAD";
3311         }
3312
3313         if ($page > 0) {
3314                 $paging_nav .= " &sdot; " .
3315                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3316                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3317         } else {
3318                 $paging_nav .= " &sdot; prev";
3319         }
3320
3321         if ($has_next_link) {
3322                 $paging_nav .= " &sdot; " .
3323                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3324                                  -accesskey => "n", -title => "Alt-n"}, "next");
3325         } else {
3326                 $paging_nav .= " &sdot; next";
3327         }
3328
3329         return $paging_nav;
3330 }
3331
3332 ## ......................................................................
3333 ## functions printing or outputting HTML: div
3334
3335 sub git_print_header_div {
3336         my ($action, $title, $hash, $hash_base) = @_;
3337         my %args = ();
3338
3339         $args{'action'} = $action;
3340         $args{'hash'} = $hash if $hash;
3341         $args{'hash_base'} = $hash_base if $hash_base;
3342
3343         print "<div class=\"header\">\n" .
3344               $cgi->a({-href => href(%args), -class => "title"},
3345               $title ? $title : $action) .
3346               "\n</div>\n";
3347 }
3348
3349 sub print_local_time {
3350         my %date = @_;
3351         if ($date{'hour_local'} < 6) {
3352                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3353                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3354         } else {
3355                 printf(" (%02d:%02d %s)",
3356                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3357         }
3358 }
3359
3360 # Outputs the author name and date in long form
3361 sub git_print_authorship {
3362         my $co = shift;
3363         my %opts = @_;
3364         my $tag = $opts{-tag} || 'div';
3365
3366         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3367         print "<$tag class=\"author_date\">" .
3368               esc_html($co->{'author_name'}) .
3369               " [$ad{'rfc2822'}";
3370         print_local_time(%ad) if ($opts{-localtime});
3371         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3372                   . "</$tag>\n";
3373 }
3374
3375 # Outputs table rows containing the full author or committer information,
3376 # in the format expected for 'commit' view (& similia).
3377 # Parameters are a commit hash reference, followed by the list of people
3378 # to output information for. If the list is empty it defalts to both
3379 # author and committer.
3380 sub git_print_authorship_rows {
3381         my $co = shift;
3382         # too bad we can't use @people = @_ || ('author', 'committer')
3383         my @people = @_;
3384         @people = ('author', 'committer') unless @people;
3385         foreach my $who (@people) {
3386                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3387                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3388                       "<td rowspan=\"2\">" .
3389                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3390                       "</td></tr>\n" .
3391                       "<tr>" .
3392                       "<td></td><td> $wd{'rfc2822'}";
3393                 print_local_time(%wd);
3394                 print "</td>" .
3395                       "</tr>\n";
3396         }
3397 }
3398
3399 sub git_print_page_path {
3400         my $name = shift;
3401         my $type = shift;
3402         my $hb = shift;
3403
3404
3405         print "<div class=\"page_path\">";
3406         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3407                       -title => 'tree root'}, to_utf8("[$project]"));
3408         print " / ";
3409         if (defined $name) {
3410                 my @dirname = split '/', $name;
3411                 my $basename = pop @dirname;
3412                 my $fullname = '';
3413
3414                 foreach my $dir (@dirname) {
3415                         $fullname .= ($fullname ? '/' : '') . $dir;
3416                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3417                                                      hash_base=>$hb),
3418                                       -title => $fullname}, esc_path($dir));
3419                         print " / ";
3420                 }
3421                 if (defined $type && $type eq 'blob') {
3422                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3423                                                      hash_base=>$hb),
3424                                       -title => $name}, esc_path($basename));
3425                 } elsif (defined $type && $type eq 'tree') {
3426                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3427                                                      hash_base=>$hb),
3428                                       -title => $name}, esc_path($basename));
3429                         print " / ";
3430                 } else {
3431                         print esc_path($basename);
3432                 }
3433         }
3434         print "<br/></div>\n";
3435 }
3436
3437 sub git_print_log {
3438         my $log = shift;
3439         my %opts = @_;
3440
3441         if ($opts{'-remove_title'}) {
3442                 # remove title, i.e. first line of log
3443                 shift @$log;
3444         }
3445         # remove leading empty lines
3446         while (defined $log->[0] && $log->[0] eq "") {
3447                 shift @$log;
3448         }
3449
3450         # print log
3451         my $signoff = 0;
3452         my $empty = 0;
3453         foreach my $line (@$log) {
3454                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3455                         $signoff = 1;
3456                         $empty = 0;
3457                         if (! $opts{'-remove_signoff'}) {
3458                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3459                                 next;
3460                         } else {
3461                                 # remove signoff lines
3462                                 next;
3463                         }
3464                 } else {
3465                         $signoff = 0;
3466                 }
3467
3468                 # print only one empty line
3469                 # do not print empty line after signoff
3470                 if ($line eq "") {
3471                         next if ($empty || $signoff);
3472                         $empty = 1;
3473                 } else {
3474                         $empty = 0;
3475                 }
3476
3477                 print format_log_line_html($line) . "<br/>\n";
3478         }
3479
3480         if ($opts{'-final_empty_line'}) {
3481                 # end with single empty line
3482                 print "<br/>\n" unless $empty;
3483         }
3484 }
3485
3486 # return link target (what link points to)
3487 sub git_get_link_target {
3488         my $hash = shift;
3489         my $link_target;
3490
3491         # read link
3492         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3493                 or return;
3494         {
3495                 local $/ = undef;
3496                 $link_target = <$fd>;
3497         }
3498         close $fd
3499                 or return;
3500
3501         return $link_target;
3502 }
3503
3504 # given link target, and the directory (basedir) the link is in,
3505 # return target of link relative to top directory (top tree);
3506 # return undef if it is not possible (including absolute links).
3507 sub normalize_link_target {
3508         my ($link_target, $basedir) = @_;
3509
3510         # absolute symlinks (beginning with '/') cannot be normalized
3511         return if (substr($link_target, 0, 1) eq '/');
3512
3513         # normalize link target to path from top (root) tree (dir)
3514         my $path;
3515         if ($basedir) {
3516                 $path = $basedir . '/' . $link_target;
3517         } else {
3518                 # we are in top (root) tree (dir)
3519                 $path = $link_target;
3520         }
3521
3522         # remove //, /./, and /../
3523         my @path_parts;
3524         foreach my $part (split('/', $path)) {
3525                 # discard '.' and ''
3526                 next if (!$part || $part eq '.');
3527                 # handle '..'
3528                 if ($part eq '..') {
3529                         if (@path_parts) {
3530                                 pop @path_parts;
3531                         } else {
3532                                 # link leads outside repository (outside top dir)
3533                                 return;
3534                         }
3535                 } else {
3536                         push @path_parts, $part;
3537                 }
3538         }
3539         $path = join('/', @path_parts);
3540
3541         return $path;
3542 }
3543
3544 # print tree entry (row of git_tree), but without encompassing <tr> element
3545 sub git_print_tree_entry {
3546         my ($t, $basedir, $hash_base, $have_blame) = @_;
3547
3548         my %base_key = ();
3549         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3550
3551         # The format of a table row is: mode list link.  Where mode is
3552         # the mode of the entry, list is the name of the entry, an href,
3553         # and link is the action links of the entry.
3554
3555         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3556         if ($t->{'type'} eq "blob") {
3557                 print "<td class=\"list\">" .
3558                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3559                                                file_name=>"$basedir$t->{'name'}", %base_key),
3560                                 -class => "list"}, esc_path($t->{'name'}));
3561                 if (S_ISLNK(oct $t->{'mode'})) {
3562                         my $link_target = git_get_link_target($t->{'hash'});
3563                         if ($link_target) {
3564                                 my $norm_target = normalize_link_target($link_target, $basedir);
3565                                 if (defined $norm_target) {
3566                                         print " -> " .
3567                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3568                                                                      file_name=>$norm_target),
3569                                                        -title => $norm_target}, esc_path($link_target));
3570                                 } else {
3571                                         print " -> " . esc_path($link_target);
3572                                 }
3573                         }
3574                 }
3575                 print "</td>\n";
3576                 print "<td class=\"link\">";
3577                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3578                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3579                               "blob");
3580                 if ($have_blame) {
3581                         print " | " .
3582                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3583                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3584                                       "blame");
3585                 }
3586                 if (defined $hash_base) {
3587                         print " | " .
3588                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3589                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3590                                       "history");
3591                 }
3592                 print " | " .
3593                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3594                                                file_name=>"$basedir$t->{'name'}")},
3595                                 "raw");
3596                 print "</td>\n";
3597
3598         } elsif ($t->{'type'} eq "tree") {
3599                 print "<td class=\"list\">";
3600                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3601                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3602                               esc_path($t->{'name'}));
3603                 print "</td>\n";
3604                 print "<td class=\"link\">";
3605                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3606                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3607                               "tree");
3608                 if (defined $hash_base) {
3609                         print " | " .
3610                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3611                                                      file_name=>"$basedir$t->{'name'}")},
3612                                       "history");
3613                 }
3614                 print "</td>\n";
3615         } else {
3616                 # unknown object: we can only present history for it
3617                 # (this includes 'commit' object, i.e. submodule support)
3618                 print "<td class=\"list\">" .
3619                       esc_path($t->{'name'}) .
3620                       "</td>\n";
3621                 print "<td class=\"link\">";
3622                 if (defined $hash_base) {
3623                         print $cgi->a({-href => href(action=>"history",
3624                                                      hash_base=>$hash_base,
3625                                                      file_name=>"$basedir$t->{'name'}")},
3626                                       "history");
3627                 }
3628                 print "</td>\n";
3629         }
3630 }
3631
3632 ## ......................................................................
3633 ## functions printing large fragments of HTML
3634
3635 # get pre-image filenames for merge (combined) diff
3636 sub fill_from_file_info {
3637         my ($diff, @parents) = @_;
3638
3639         $diff->{'from_file'} = [ ];
3640         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3641         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3642                 if ($diff->{'status'}[$i] eq 'R' ||
3643                     $diff->{'status'}[$i] eq 'C') {
3644                         $diff->{'from_file'}[$i] =
3645                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3646                 }
3647         }
3648
3649         return $diff;
3650 }
3651
3652 # is current raw difftree line of file deletion
3653 sub is_deleted {
3654         my $diffinfo = shift;
3655
3656         return $diffinfo->{'to_id'} eq ('0' x 40);
3657 }
3658
3659 # does patch correspond to [previous] difftree raw line
3660 # $diffinfo  - hashref of parsed raw diff format
3661 # $patchinfo - hashref of parsed patch diff format
3662 #              (the same keys as in $diffinfo)
3663 sub is_patch_split {
3664         my ($diffinfo, $patchinfo) = @_;
3665
3666         return defined $diffinfo && defined $patchinfo
3667                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3668 }
3669
3670
3671 sub git_difftree_body {
3672         my ($difftree, $hash, @parents) = @_;
3673         my ($parent) = $parents[0];
3674         my $have_blame = gitweb_check_feature('blame');
3675         print "<div class=\"list_head\">\n";
3676         if ($#{$difftree} > 10) {
3677                 print(($#{$difftree} + 1) . " files changed:\n");
3678         }
3679         print "</div>\n";
3680
3681         print "<table class=\"" .
3682               (@parents > 1 ? "combined " : "") .
3683               "diff_tree\">\n";
3684
3685         # header only for combined diff in 'commitdiff' view
3686         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3687         if ($has_header) {
3688                 # table header
3689                 print "<thead><tr>\n" .
3690                        "<th></th><th></th>\n"; # filename, patchN link
3691                 for (my $i = 0; $i < @parents; $i++) {
3692                         my $par = $parents[$i];
3693                         print "<th>" .
3694                               $cgi->a({-href => href(action=>"commitdiff",
3695                                                      hash=>$hash, hash_parent=>$par),
3696                                        -title => 'commitdiff to parent number ' .
3697                                                   ($i+1) . ': ' . substr($par,0,7)},
3698                                       $i+1) .
3699                               "&nbsp;</th>\n";
3700                 }
3701                 print "</tr></thead>\n<tbody>\n";
3702         }
3703
3704         my $alternate = 1;
3705         my $patchno = 0;
3706         foreach my $line (@{$difftree}) {
3707                 my $diff = parsed_difftree_line($line);
3708
3709                 if ($alternate) {
3710                         print "<tr class=\"dark\">\n";
3711                 } else {
3712                         print "<tr class=\"light\">\n";
3713                 }
3714                 $alternate ^= 1;
3715
3716                 if (exists $diff->{'nparents'}) { # combined diff
3717
3718                         fill_from_file_info($diff, @parents)
3719                                 unless exists $diff->{'from_file'};
3720
3721                         if (!is_deleted($diff)) {
3722                                 # file exists in the result (child) commit
3723                                 print "<td>" .
3724                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3725                                                              file_name=>$diff->{'to_file'},
3726                                                              hash_base=>$hash),
3727                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3728                                       "</td>\n";
3729                         } else {
3730                                 print "<td>" .
3731                                       esc_path($diff->{'to_file'}) .
3732                                       "</td>\n";
3733                         }
3734
3735                         if ($action eq 'commitdiff') {
3736                                 # link to patch
3737                                 $patchno++;
3738                                 print "<td class=\"link\">" .
3739                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3740                                       " | " .
3741                                       "</td>\n";
3742                         }
3743
3744                         my $has_history = 0;
3745                         my $not_deleted = 0;
3746                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3747                                 my $hash_parent = $parents[$i];
3748                                 my $from_hash = $diff->{'from_id'}[$i];
3749                                 my $from_path = $diff->{'from_file'}[$i];
3750                                 my $status = $diff->{'status'}[$i];
3751
3752                                 $has_history ||= ($status ne 'A');
3753                                 $not_deleted ||= ($status ne 'D');
3754
3755                                 if ($status eq 'A') {
3756                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3757                                 } elsif ($status eq 'D') {
3758                                         print "<td class=\"link\">" .
3759                                               $cgi->a({-href => href(action=>"blob",
3760                                                                      hash_base=>$hash,
3761                                                                      hash=>$from_hash,
3762                                                                      file_name=>$from_path)},
3763                                                       "blob" . ($i+1)) .
3764                                               " | </td>\n";
3765                                 } else {
3766                                         if ($diff->{'to_id'} eq $from_hash) {
3767                                                 print "<td class=\"link nochange\">";
3768                                         } else {
3769                                                 print "<td class=\"link\">";
3770                                         }
3771                                         print $cgi->a({-href => href(action=>"blobdiff",
3772                                                                      hash=>$diff->{'to_id'},
3773                                                                      hash_parent=>$from_hash,
3774                                                                      hash_base=>$hash,
3775                                                                      hash_parent_base=>$hash_parent,
3776                                                                      file_name=>$diff->{'to_file'},
3777                                                                      file_parent=>$from_path)},
3778                                                       "diff" . ($i+1)) .
3779                                               " | </td>\n";
3780                                 }
3781                         }
3782
3783                         print "<td class=\"link\">";
3784                         if ($not_deleted) {
3785                                 print $cgi->a({-href => href(action=>"blob",
3786                                                              hash=>$diff->{'to_id'},
3787                                                              file_name=>$diff->{'to_file'},
3788                                                              hash_base=>$hash)},
3789                                               "blob");
3790                                 print " | " if ($has_history);
3791                         }
3792                         if ($has_history) {
3793                                 print $cgi->a({-href => href(action=>"history",
3794                                                              file_name=>$diff->{'to_file'},
3795                                                              hash_base=>$hash)},
3796                                               "history");
3797                         }
3798                         print "</td>\n";
3799
3800                         print "</tr>\n";
3801                         next; # instead of 'else' clause, to avoid extra indent
3802                 }
3803                 # else ordinary diff
3804
3805                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3806                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3807                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3808                         $to_mode_oct = oct $diff->{'to_mode'};
3809                         if (S_ISREG($to_mode_oct)) { # only for regular file
3810                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3811                         }
3812                         $to_file_type = file_type($diff->{'to_mode'});
3813                 }
3814                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3815                         $from_mode_oct = oct $diff->{'from_mode'};
3816                         if (S_ISREG($to_mode_oct)) { # only for regular file
3817                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3818                         }
3819                         $from_file_type = file_type($diff->{'from_mode'});
3820                 }
3821
3822                 if ($diff->{'status'} eq "A") { # created
3823                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3824                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3825                         $mode_chng   .= "]</span>";
3826                         print "<td>";
3827                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3828                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3829                                       -class => "list"}, esc_path($diff->{'file'}));
3830                         print "</td>\n";
3831                         print "<td>$mode_chng</td>\n";
3832                         print "<td class=\"link\">";
3833                         if ($action eq 'commitdiff') {
3834                                 # link to patch
3835                                 $patchno++;
3836                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3837                                 print " | ";
3838                         }
3839                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3840                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3841                                       "blob");
3842                         print "</td>\n";
3843
3844                 } elsif ($diff->{'status'} eq "D") { # deleted
3845                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3846                         print "<td>";
3847                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3848                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3849                                        -class => "list"}, esc_path($diff->{'file'}));
3850                         print "</td>\n";
3851                         print "<td>$mode_chng</td>\n";
3852                         print "<td class=\"link\">";
3853                         if ($action eq 'commitdiff') {
3854                                 # link to patch
3855                                 $patchno++;
3856                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3857                                 print " | ";
3858                         }
3859                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3860                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3861                                       "blob") . " | ";
3862                         if ($have_blame) {
3863                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3864                                                              file_name=>$diff->{'file'})},
3865                                               "blame") . " | ";
3866                         }
3867                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3868                                                      file_name=>$diff->{'file'})},
3869                                       "history");
3870                         print "</td>\n";
3871
3872                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3873                         my $mode_chnge = "";
3874                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3875                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3876                                 if ($from_file_type ne $to_file_type) {
3877                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3878                                 }
3879                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3880                                         if ($from_mode_str && $to_mode_str) {
3881                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3882                                         } elsif ($to_mode_str) {
3883                                                 $mode_chnge .= " mode: $to_mode_str";
3884                                         }
3885                                 }
3886                                 $mode_chnge .= "]</span>\n";
3887                         }
3888                         print "<td>";
3889                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3890                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3891                                       -class => "list"}, esc_path($diff->{'file'}));
3892                         print "</td>\n";
3893                         print "<td>$mode_chnge</td>\n";
3894                         print "<td class=\"link\">";
3895                         if ($action eq 'commitdiff') {
3896                                 # link to patch
3897                                 $patchno++;
3898                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3899                                       " | ";
3900                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3901                                 # "commit" view and modified file (not onlu mode changed)
3902                                 print $cgi->a({-href => href(action=>"blobdiff",
3903                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3904                                                              hash_base=>$hash, hash_parent_base=>$parent,
3905                                                              file_name=>$diff->{'file'})},
3906                                               "diff") .
3907                                       " | ";
3908                         }
3909                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3910                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3911                                        "blob") . " | ";
3912                         if ($have_blame) {
3913                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3914                                                              file_name=>$diff->{'file'})},
3915                                               "blame") . " | ";
3916                         }
3917                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3918                                                      file_name=>$diff->{'file'})},
3919                                       "history");
3920                         print "</td>\n";
3921
3922                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3923                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3924                         my $nstatus = $status_name{$diff->{'status'}};
3925                         my $mode_chng = "";
3926                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3927                                 # mode also for directories, so we cannot use $to_mode_str
3928                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3929                         }
3930                         print "<td>" .
3931                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3932                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3933                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3934                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3935                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3936                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3937                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3938                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3939                               "<td class=\"link\">";
3940                         if ($action eq 'commitdiff') {
3941                                 # link to patch
3942                                 $patchno++;
3943                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3944                                       " | ";
3945                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3946                                 # "commit" view and modified file (not only pure rename or copy)
3947                                 print $cgi->a({-href => href(action=>"blobdiff",
3948                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3949                                                              hash_base=>$hash, hash_parent_base=>$parent,
3950                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3951                                               "diff") .
3952                                       " | ";
3953                         }
3954                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3955                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3956                                       "blob") . " | ";
3957                         if ($have_blame) {
3958                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3959                                                              file_name=>$diff->{'to_file'})},
3960                                               "blame") . " | ";
3961                         }
3962                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3963                                                     file_name=>$diff->{'to_file'})},
3964                                       "history");
3965                         print "</td>\n";
3966
3967                 } # we should not encounter Unmerged (U) or Unknown (X) status
3968                 print "</tr>\n";
3969         }
3970         print "</tbody>" if $has_header;
3971         print "</table>\n";
3972 }
3973
3974 sub git_patchset_body {
3975         my ($fd, $difftree, $hash, @hash_parents) = @_;
3976         my ($hash_parent) = $hash_parents[0];
3977
3978         my $is_combined = (@hash_parents > 1);
3979         my $patch_idx = 0;
3980         my $patch_number = 0;
3981         my $patch_line;
3982         my $diffinfo;
3983         my $to_name;
3984         my (%from, %to);
3985
3986         print "<div class=\"patchset\">\n";
3987
3988         # skip to first patch
3989         while ($patch_line = <$fd>) {
3990                 chomp $patch_line;
3991
3992                 last if ($patch_line =~ m/^diff /);
3993         }
3994
3995  PATCH:
3996         while ($patch_line) {
3997
3998                 # parse "git diff" header line
3999                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4000                         # $1 is from_name, which we do not use
4001                         $to_name = unquote($2);
4002                         $to_name =~ s!^b/!!;
4003                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4004                         # $1 is 'cc' or 'combined', which we do not use
4005                         $to_name = unquote($2);
4006                 } else {
4007                         $to_name = undef;
4008                 }
4009
4010                 # check if current patch belong to current raw line
4011                 # and parse raw git-diff line if needed
4012                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4013                         # this is continuation of a split patch
4014                         print "<div class=\"patch cont\">\n";
4015                 } else {
4016                         # advance raw git-diff output if needed
4017                         $patch_idx++ if defined $diffinfo;
4018
4019                         # read and prepare patch information
4020                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4021
4022                         # compact combined diff output can have some patches skipped
4023                         # find which patch (using pathname of result) we are at now;
4024                         if ($is_combined) {
4025                                 while ($to_name ne $diffinfo->{'to_file'}) {
4026                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4027                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4028                                               "</div>\n";  # class="patch"
4029
4030                                         $patch_idx++;
4031                                         $patch_number++;
4032
4033                                         last if $patch_idx > $#$difftree;
4034                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4035                                 }
4036                         }
4037
4038                         # modifies %from, %to hashes
4039                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4040
4041                         # this is first patch for raw difftree line with $patch_idx index
4042                         # we index @$difftree array from 0, but number patches from 1
4043                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4044                 }
4045
4046                 # git diff header
4047                 #assert($patch_line =~ m/^diff /) if DEBUG;
4048                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4049                 $patch_number++;
4050                 # print "git diff" header
4051                 print format_git_diff_header_line($patch_line, $diffinfo,
4052                                                   \%from, \%to);
4053
4054                 # print extended diff header
4055                 print "<div class=\"diff extended_header\">\n";
4056         EXTENDED_HEADER:
4057                 while ($patch_line = <$fd>) {
4058                         chomp $patch_line;
4059
4060                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4061
4062                         print format_extended_diff_header_line($patch_line, $diffinfo,
4063                                                                \%from, \%to);
4064                 }
4065                 print "</div>\n"; # class="diff extended_header"
4066
4067                 # from-file/to-file diff header
4068                 if (! $patch_line) {
4069                         print "</div>\n"; # class="patch"
4070                         last PATCH;
4071                 }
4072                 next PATCH if ($patch_line =~ m/^diff /);
4073                 #assert($patch_line =~ m/^---/) if DEBUG;
4074
4075                 my $last_patch_line = $patch_line;
4076                 $patch_line = <$fd>;
4077                 chomp $patch_line;
4078                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4079
4080                 print format_diff_from_to_header($last_patch_line, $patch_line,
4081                                                  $diffinfo, \%from, \%to,
4082                                                  @hash_parents);
4083
4084                 # the patch itself
4085         LINE:
4086                 while ($patch_line = <$fd>) {
4087                         chomp $patch_line;
4088
4089                         next PATCH if ($patch_line =~ m/^diff /);
4090
4091                         print format_diff_line($patch_line, \%from, \%to);
4092                 }
4093
4094         } continue {
4095                 print "</div>\n"; # class="patch"
4096         }
4097
4098         # for compact combined (--cc) format, with chunk and patch simpliciaction
4099         # patchset might be empty, but there might be unprocessed raw lines
4100         for (++$patch_idx if $patch_number > 0;
4101              $patch_idx < @$difftree;
4102              ++$patch_idx) {
4103                 # read and prepare patch information
4104                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4105
4106                 # generate anchor for "patch" links in difftree / whatchanged part
4107                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4108                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4109                       "</div>\n";  # class="patch"
4110
4111                 $patch_number++;
4112         }
4113
4114         if ($patch_number == 0) {
4115                 if (@hash_parents > 1) {
4116                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4117                 } else {
4118                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4119                 }
4120         }
4121
4122         print "</div>\n"; # class="patchset"
4123 }
4124
4125 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4126
4127 # fills project list info (age, description, owner, forks) for each
4128 # project in the list, removing invalid projects from returned list
4129 # NOTE: modifies $projlist, but does not remove entries from it
4130 sub fill_project_list_info {
4131         my ($projlist, $check_forks) = @_;
4132         my @projects;
4133
4134         my $show_ctags = gitweb_check_feature('ctags');
4135  PROJECT:
4136         foreach my $pr (@$projlist) {
4137                 my (@activity) = git_get_last_activity($pr->{'path'});
4138                 unless (@activity) {
4139                         next PROJECT;
4140                 }
4141                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4142                 if (!defined $pr->{'descr'}) {
4143                         my $descr = git_get_project_description($pr->{'path'}) || "";
4144                         $descr = to_utf8($descr);
4145                         $pr->{'descr_long'} = $descr;
4146                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4147                 }
4148                 if (!defined $pr->{'owner'}) {
4149                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4150                 }
4151                 if ($check_forks) {
4152                         my $pname = $pr->{'path'};
4153                         if (($pname =~ s/\.git$//) &&
4154                             ($pname !~ /\/$/) &&
4155                             (-d "$projectroot/$pname")) {
4156                                 $pr->{'forks'} = "-d $projectroot/$pname";
4157                         } else {
4158                                 $pr->{'forks'} = 0;
4159                         }
4160                 }
4161                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4162                 push @projects, $pr;
4163         }
4164
4165         return @projects;
4166 }
4167
4168 # print 'sort by' <th> element, generating 'sort by $name' replay link
4169 # if that order is not selected
4170 sub print_sort_th {
4171         my ($name, $order, $header) = @_;
4172         $header ||= ucfirst($name);
4173
4174         if ($order eq $name) {
4175                 print "<th>$header</th>\n";
4176         } else {
4177                 print "<th>" .
4178                       $cgi->a({-href => href(-replay=>1, order=>$name),
4179                                -class => "header"}, $header) .
4180                       "</th>\n";
4181         }
4182 }
4183
4184 sub git_project_list_body {
4185         # actually uses global variable $project
4186         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4187
4188         my $check_forks = gitweb_check_feature('forks');
4189         my @projects = fill_project_list_info($projlist, $check_forks);
4190
4191         $order ||= $default_projects_order;
4192         $from = 0 unless defined $from;
4193         $to = $#projects if (!defined $to || $#projects < $to);
4194
4195         my %order_info = (
4196                 project => { key => 'path', type => 'str' },
4197                 descr => { key => 'descr_long', type => 'str' },
4198                 owner => { key => 'owner', type => 'str' },
4199                 age => { key => 'age', type => 'num' }
4200         );
4201         my $oi = $order_info{$order};
4202         if ($oi->{'type'} eq 'str') {
4203                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4204         } else {
4205                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4206         }
4207
4208         my $show_ctags = gitweb_check_feature('ctags');
4209         if ($show_ctags) {
4210                 my %ctags;
4211                 foreach my $p (@projects) {
4212                         foreach my $ct (keys %{$p->{'ctags'}}) {
4213                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4214                         }
4215                 }
4216                 my $cloud = git_populate_project_tagcloud(\%ctags);
4217                 print git_show_project_tagcloud($cloud, 64);
4218         }
4219
4220         print "<table class=\"project_list\">\n";
4221         unless ($no_header) {
4222                 print "<tr>\n";
4223                 if ($check_forks) {
4224                         print "<th></th>\n";
4225                 }
4226                 print_sort_th('project', $order, 'Project');
4227                 print_sort_th('descr', $order, 'Description');
4228                 print_sort_th('owner', $order, 'Owner');
4229                 print_sort_th('age', $order, 'Last Change');
4230                 print "<th></th>\n" . # for links
4231                       "</tr>\n";
4232         }
4233         my $alternate = 1;
4234         my $tagfilter = $cgi->param('by_tag');
4235         for (my $i = $from; $i <= $to; $i++) {
4236                 my $pr = $projects[$i];
4237
4238                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4239                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4240                         and not $pr->{'descr_long'} =~ /$searchtext/;
4241                 # Weed out forks or non-matching entries of search
4242                 if ($check_forks) {
4243                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4244                         $forkbase="^$forkbase" if $forkbase;
4245                         next if not $searchtext and not $tagfilter and $show_ctags
4246                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4247                 }
4248
4249                 if ($alternate) {
4250                         print "<tr class=\"dark\">\n";
4251                 } else {
4252                         print "<tr class=\"light\">\n";
4253                 }
4254                 $alternate ^= 1;
4255                 if ($check_forks) {
4256                         print "<td>";
4257                         if ($pr->{'forks'}) {
4258                                 print "<!-- $pr->{'forks'} -->\n";
4259                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4260                         }
4261                         print "</td>\n";
4262                 }
4263                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4264                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4265                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4266                                         -class => "list", -title => $pr->{'descr_long'}},
4267                                         esc_html($pr->{'descr'})) . "</td>\n" .
4268                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4269                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4270                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4271                       "<td class=\"link\">" .
4272                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4273                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4274                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4275                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4276                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4277                       "</td>\n" .
4278                       "</tr>\n";
4279         }
4280         if (defined $extra) {
4281                 print "<tr>\n";
4282                 if ($check_forks) {
4283                         print "<td></td>\n";
4284                 }
4285                 print "<td colspan=\"5\">$extra</td>\n" .
4286                       "</tr>\n";
4287         }
4288         print "</table>\n";
4289 }
4290
4291 sub git_shortlog_body {
4292         # uses global variable $project
4293         my ($commitlist, $from, $to, $refs, $extra) = @_;
4294
4295         $from = 0 unless defined $from;
4296         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4297
4298         print "<table class=\"shortlog\">\n";
4299         my $alternate = 1;
4300         for (my $i = $from; $i <= $to; $i++) {
4301                 my %co = %{$commitlist->[$i]};
4302                 my $commit = $co{'id'};
4303                 my $ref = format_ref_marker($refs, $commit);
4304                 if ($alternate) {
4305                         print "<tr class=\"dark\">\n";
4306                 } else {
4307                         print "<tr class=\"light\">\n";
4308                 }
4309                 $alternate ^= 1;
4310                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4311                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4312                       format_author_html('td', \%co, 10) . "<td>";
4313                 print format_subject_html($co{'title'}, $co{'title_short'},
4314                                           href(action=>"commit", hash=>$commit), $ref);
4315                 print "</td>\n" .
4316                       "<td class=\"link\">" .
4317                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4318                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4319                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4320                 my $snapshot_links = format_snapshot_links($commit);
4321                 if (defined $snapshot_links) {
4322                         print " | " . $snapshot_links;
4323                 }
4324                 print "</td>\n" .
4325                       "</tr>\n";
4326         }
4327         if (defined $extra) {
4328                 print "<tr>\n" .
4329                       "<td colspan=\"4\">$extra</td>\n" .
4330                       "</tr>\n";
4331         }
4332         print "</table>\n";
4333 }
4334
4335 sub git_history_body {
4336         # Warning: assumes constant type (blob or tree) during history
4337         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4338
4339         $from = 0 unless defined $from;
4340         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4341
4342         print "<table class=\"history\">\n";
4343         my $alternate = 1;
4344         for (my $i = $from; $i <= $to; $i++) {
4345                 my %co = %{$commitlist->[$i]};
4346                 if (!%co) {
4347                         next;
4348                 }
4349                 my $commit = $co{'id'};
4350
4351                 my $ref = format_ref_marker($refs, $commit);
4352
4353                 if ($alternate) {
4354                         print "<tr class=\"dark\">\n";
4355                 } else {
4356                         print "<tr class=\"light\">\n";
4357                 }
4358                 $alternate ^= 1;
4359                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4360         # shortlog:   format_author_html('td', \%co, 10)
4361                       format_author_html('td', \%co, 15, 3) . "<td>";
4362                 # originally git_history used chop_str($co{'title'}, 50)
4363                 print format_subject_html($co{'title'}, $co{'title_short'},
4364                                           href(action=>"commit", hash=>$commit), $ref);
4365                 print "</td>\n" .
4366                       "<td class=\"link\">" .
4367                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4368                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4369
4370                 if ($ftype eq 'blob') {
4371                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4372                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4373                         if (defined $blob_current && defined $blob_parent &&
4374                                         $blob_current ne $blob_parent) {
4375                                 print " | " .
4376                                         $cgi->a({-href => href(action=>"blobdiff",
4377                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4378                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4379                                                                file_name=>$file_name)},
4380                                                 "diff to current");
4381                         }
4382                 }
4383                 print "</td>\n" .
4384                       "</tr>\n";
4385         }
4386         if (defined $extra) {
4387                 print "<tr>\n" .
4388                       "<td colspan=\"4\">$extra</td>\n" .
4389                       "</tr>\n";
4390         }
4391         print "</table>\n";
4392 }
4393
4394 sub git_tags_body {
4395         # uses global variable $project
4396         my ($taglist, $from, $to, $extra) = @_;
4397         $from = 0 unless defined $from;
4398         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4399
4400         print "<table class=\"tags\">\n";
4401         my $alternate = 1;
4402         for (my $i = $from; $i <= $to; $i++) {
4403                 my $entry = $taglist->[$i];
4404                 my %tag = %$entry;
4405                 my $comment = $tag{'subject'};
4406                 my $comment_short;
4407                 if (defined $comment) {
4408                         $comment_short = chop_str($comment, 30, 5);
4409                 }
4410                 if ($alternate) {
4411                         print "<tr class=\"dark\">\n";
4412                 } else {
4413                         print "<tr class=\"light\">\n";
4414                 }
4415                 $alternate ^= 1;
4416                 if (defined $tag{'age'}) {
4417                         print "<td><i>$tag{'age'}</i></td>\n";
4418                 } else {
4419                         print "<td></td>\n";
4420                 }
4421                 print "<td>" .
4422                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4423                                -class => "list name"}, esc_html($tag{'name'})) .
4424                       "</td>\n" .
4425                       "<td>";
4426                 if (defined $comment) {
4427                         print format_subject_html($comment, $comment_short,
4428                                                   href(action=>"tag", hash=>$tag{'id'}));
4429                 }
4430                 print "</td>\n" .
4431                       "<td class=\"selflink\">";
4432                 if ($tag{'type'} eq "tag") {
4433                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4434                 } else {
4435                         print "&nbsp;";
4436                 }
4437                 print "</td>\n" .
4438                       "<td class=\"link\">" . " | " .
4439                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4440                 if ($tag{'reftype'} eq "commit") {
4441                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4442                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4443                 } elsif ($tag{'reftype'} eq "blob") {
4444                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4445                 }
4446                 print "</td>\n" .
4447                       "</tr>";
4448         }
4449         if (defined $extra) {
4450                 print "<tr>\n" .
4451                       "<td colspan=\"5\">$extra</td>\n" .
4452                       "</tr>\n";
4453         }
4454         print "</table>\n";
4455 }
4456
4457 sub git_heads_body {
4458         # uses global variable $project
4459         my ($headlist, $head, $from, $to, $extra) = @_;
4460         $from = 0 unless defined $from;
4461         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4462
4463         print "<table class=\"heads\">\n";
4464         my $alternate = 1;
4465         for (my $i = $from; $i <= $to; $i++) {
4466                 my $entry = $headlist->[$i];
4467                 my %ref = %$entry;
4468                 my $curr = $ref{'id'} eq $head;
4469                 if ($alternate) {
4470                         print "<tr class=\"dark\">\n";
4471                 } else {
4472                         print "<tr class=\"light\">\n";
4473                 }
4474                 $alternate ^= 1;
4475                 print "<td><i>$ref{'age'}</i></td>\n" .
4476                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4477                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4478                                -class => "list name"},esc_html($ref{'name'})) .
4479                       "</td>\n" .
4480                       "<td class=\"link\">" .
4481                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4482                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4483                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4484                       "</td>\n" .
4485                       "</tr>";
4486         }
4487         if (defined $extra) {
4488                 print "<tr>\n" .
4489                       "<td colspan=\"3\">$extra</td>\n" .
4490                       "</tr>\n";
4491         }
4492         print "</table>\n";
4493 }
4494
4495 sub git_search_grep_body {
4496         my ($commitlist, $from, $to, $extra) = @_;
4497         $from = 0 unless defined $from;
4498         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4499
4500         print "<table class=\"commit_search\">\n";
4501         my $alternate = 1;
4502         for (my $i = $from; $i <= $to; $i++) {
4503                 my %co = %{$commitlist->[$i]};
4504                 if (!%co) {
4505                         next;
4506                 }
4507                 my $commit = $co{'id'};
4508                 if ($alternate) {
4509                         print "<tr class=\"dark\">\n";
4510                 } else {
4511                         print "<tr class=\"light\">\n";
4512                 }
4513                 $alternate ^= 1;
4514                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4515                       format_author_html('td', \%co, 15, 5) .
4516                       "<td>" .
4517                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4518                                -class => "list subject"},
4519                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4520                 my $comment = $co{'comment'};
4521                 foreach my $line (@$comment) {
4522                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4523                                 my ($lead, $match, $trail) = ($1, $2, $3);
4524                                 $match = chop_str($match, 70, 5, 'center');
4525                                 my $contextlen = int((80 - length($match))/2);
4526                                 $contextlen = 30 if ($contextlen > 30);
4527                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4528                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4529
4530                                 $lead  = esc_html($lead);
4531                                 $match = esc_html($match);
4532                                 $trail = esc_html($trail);
4533
4534                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4535                         }
4536                 }
4537                 print "</td>\n" .
4538                       "<td class=\"link\">" .
4539                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4540                       " | " .
4541                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4542                       " | " .
4543                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4544                 print "</td>\n" .
4545                       "</tr>\n";
4546         }
4547         if (defined $extra) {
4548                 print "<tr>\n" .
4549                       "<td colspan=\"3\">$extra</td>\n" .
4550                       "</tr>\n";
4551         }
4552         print "</table>\n";
4553 }
4554
4555 ## ======================================================================
4556 ## ======================================================================
4557 ## actions
4558
4559 sub git_project_list {
4560         my $order = $input_params{'order'};
4561         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4562                 die_error(400, "Unknown order parameter");
4563         }
4564
4565         my @list = git_get_projects_list();
4566         if (!@list) {
4567                 die_error(404, "No projects found");
4568         }
4569
4570         git_header_html();
4571         if (-f $home_text) {
4572                 print "<div class=\"index_include\">\n";
4573                 insert_file($home_text);
4574                 print "</div>\n";
4575         }
4576         print $cgi->startform(-method => "get") .
4577               "<p class=\"projsearch\">Search:\n" .
4578               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4579               "</p>" .
4580               $cgi->end_form() . "\n";
4581         git_project_list_body(\@list, $order);
4582         git_footer_html();
4583 }
4584
4585 sub git_forks {
4586         my $order = $input_params{'order'};
4587         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4588                 die_error(400, "Unknown order parameter");
4589         }
4590
4591         my @list = git_get_projects_list($project);
4592         if (!@list) {
4593                 die_error(404, "No forks found");
4594         }
4595
4596         git_header_html();
4597         git_print_page_nav('','');
4598         git_print_header_div('summary', "$project forks");
4599         git_project_list_body(\@list, $order);
4600         git_footer_html();
4601 }
4602
4603 sub git_project_index {
4604         my @projects = git_get_projects_list($project);
4605
4606         print $cgi->header(
4607                 -type => 'text/plain',
4608                 -charset => 'utf-8',
4609                 -content_disposition => 'inline; filename="index.aux"');
4610
4611         foreach my $pr (@projects) {
4612                 if (!exists $pr->{'owner'}) {
4613                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4614                 }
4615
4616                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4617                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4618                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4619                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4620                 $path  =~ s/ /\+/g;
4621                 $owner =~ s/ /\+/g;
4622
4623                 print "$path $owner\n";
4624         }
4625 }
4626
4627 sub git_summary {
4628         my $descr = git_get_project_description($project) || "none";
4629         my %co = parse_commit("HEAD");
4630         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4631         my $head = $co{'id'};
4632
4633         my $owner = git_get_project_owner($project);
4634
4635         my $refs = git_get_references();
4636         # These get_*_list functions return one more to allow us to see if
4637         # there are more ...
4638         my @taglist  = git_get_tags_list(16);
4639         my @headlist = git_get_heads_list(16);
4640         my @forklist;
4641         my $check_forks = gitweb_check_feature('forks');
4642
4643         if ($check_forks) {
4644                 @forklist = git_get_projects_list($project);
4645         }
4646
4647         git_header_html();
4648         git_print_page_nav('summary','', $head);
4649
4650         print "<div class=\"title\">&nbsp;</div>\n";
4651         print "<table class=\"projects_list\">\n" .
4652               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4653               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4654         if (defined $cd{'rfc2822'}) {
4655                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4656         }
4657
4658         # use per project git URL list in $projectroot/$project/cloneurl
4659         # or make project git URL from git base URL and project name
4660         my $url_tag = "URL";
4661         my @url_list = git_get_project_url_list($project);
4662         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4663         foreach my $git_url (@url_list) {
4664                 next unless $git_url;
4665                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4666                 $url_tag = "";
4667         }
4668
4669         # Tag cloud
4670         my $show_ctags = gitweb_check_feature('ctags');
4671         if ($show_ctags) {
4672                 my $ctags = git_get_project_ctags($project);
4673                 my $cloud = git_populate_project_tagcloud($ctags);
4674                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4675                 print "</td>\n<td>" unless %$ctags;
4676                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4677                 print "</td>\n<td>" if %$ctags;
4678                 print git_show_project_tagcloud($cloud, 48);
4679                 print "</td></tr>";
4680         }
4681
4682         print "</table>\n";
4683
4684         # If XSS prevention is on, we don't include README.html.
4685         # TODO: Allow a readme in some safe format.
4686         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4687                 print "<div class=\"title\">readme</div>\n" .
4688                       "<div class=\"readme\">\n";
4689                 insert_file("$projectroot/$project/README.html");
4690                 print "\n</div>\n"; # class="readme"
4691         }
4692
4693         # we need to request one more than 16 (0..15) to check if
4694         # those 16 are all
4695         my @commitlist = $head ? parse_commits($head, 17) : ();
4696         if (@commitlist) {
4697                 git_print_header_div('shortlog');
4698                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4699                                   $#commitlist <=  15 ? undef :
4700                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4701         }
4702
4703         if (@taglist) {
4704                 git_print_header_div('tags');
4705                 git_tags_body(\@taglist, 0, 15,
4706                               $#taglist <=  15 ? undef :
4707                               $cgi->a({-href => href(action=>"tags")}, "..."));
4708         }
4709
4710         if (@headlist) {
4711                 git_print_header_div('heads');
4712                 git_heads_body(\@headlist, $head, 0, 15,
4713                                $#headlist <= 15 ? undef :
4714                                $cgi->a({-href => href(action=>"heads")}, "..."));
4715         }
4716
4717         if (@forklist) {
4718                 git_print_header_div('forks');
4719                 git_project_list_body(\@forklist, 'age', 0, 15,
4720                                       $#forklist <= 15 ? undef :
4721                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4722                                       'no_header');
4723         }
4724
4725         git_footer_html();
4726 }
4727
4728 sub git_tag {
4729         my $head = git_get_head_hash($project);
4730         git_header_html();
4731         git_print_page_nav('','', $head,undef,$head);
4732         my %tag = parse_tag($hash);
4733
4734         if (! %tag) {
4735                 die_error(404, "Unknown tag object");
4736         }
4737
4738         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4739         print "<div class=\"title_text\">\n" .
4740               "<table class=\"object_header\">\n" .
4741               "<tr>\n" .
4742               "<td>object</td>\n" .
4743               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4744                                $tag{'object'}) . "</td>\n" .
4745               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4746                                               $tag{'type'}) . "</td>\n" .
4747               "</tr>\n";
4748         if (defined($tag{'author'})) {
4749                 git_print_authorship_rows(\%tag, 'author');
4750         }
4751         print "</table>\n\n" .
4752               "</div>\n";
4753         print "<div class=\"page_body\">";
4754         my $comment = $tag{'comment'};
4755         foreach my $line (@$comment) {
4756                 chomp $line;
4757                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4758         }
4759         print "</div>\n";
4760         git_footer_html();
4761 }
4762
4763 sub git_blame {
4764         # permissions
4765         gitweb_check_feature('blame')
4766                 or die_error(403, "Blame view not allowed");
4767
4768         # error checking
4769         die_error(400, "No file name given") unless $file_name;
4770         $hash_base ||= git_get_head_hash($project);
4771         die_error(404, "Couldn't find base commit") unless $hash_base;
4772         my %co = parse_commit($hash_base)
4773                 or die_error(404, "Commit not found");
4774         my $ftype = "blob";
4775         if (!defined $hash) {
4776                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4777                         or die_error(404, "Error looking up file");
4778         } else {
4779                 $ftype = git_get_type($hash);
4780                 if ($ftype !~ "blob") {
4781                         die_error(400, "Object is not a blob");
4782                 }
4783         }
4784
4785         # run git-blame --porcelain
4786         open my $fd, "-|", git_cmd(), "blame", '-p',
4787                 $hash_base, '--', $file_name
4788                 or die_error(500, "Open git-blame failed");
4789
4790         # page header
4791         git_header_html();
4792         my $formats_nav =
4793                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4794                         "blob") .
4795                 " | " .
4796                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4797                         "history") .
4798                 " | " .
4799                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4800                         "HEAD");
4801         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4802         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4803         git_print_page_path($file_name, $ftype, $hash_base);
4804
4805         # page body
4806         my @rev_color = qw(light dark);
4807         my $num_colors = scalar(@rev_color);
4808         my $current_color = 0;
4809         my %metainfo = ();
4810
4811         print <<HTML;
4812 <div class="page_body">
4813 <table class="blame">
4814 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4815 HTML
4816  LINE:
4817         while (my $line = <$fd>) {
4818                 chomp $line;
4819                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4820                 # no <lines in group> for subsequent lines in group of lines
4821                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4822                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4823                 if (!exists $metainfo{$full_rev}) {
4824                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4825                 }
4826                 my $meta = $metainfo{$full_rev};
4827                 my $data;
4828                 while ($data = <$fd>) {
4829                         chomp $data;
4830                         last if ($data =~ s/^\t//); # contents of line
4831                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4832                                 $meta->{$1} = $2 unless exists $meta->{$1};
4833                         }
4834                         if ($data =~ /^previous /) {
4835                                 $meta->{'nprevious'}++;
4836                         }
4837                 }
4838                 my $short_rev = substr($full_rev, 0, 8);
4839                 my $author = $meta->{'author'};
4840                 my %date =
4841                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4842                 my $date = $date{'iso-tz'};
4843                 if ($group_size) {
4844                         $current_color = ($current_color + 1) % $num_colors;
4845                 }
4846                 my $tr_class = $rev_color[$current_color];
4847                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4848                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4849                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4850                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4851                 if ($group_size) {
4852                         print "<td class=\"sha1\"";
4853                         print " title=\"". esc_html($author) . ", $date\"";
4854                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4855                         print ">";
4856                         print $cgi->a({-href => href(action=>"commit",
4857                                                      hash=>$full_rev,
4858                                                      file_name=>$file_name)},
4859                                       esc_html($short_rev));
4860                         if ($group_size >= 2) {
4861                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4862                                 if (@author_initials) {
4863                                         print "<br />" .
4864                                               esc_html(join('', @author_initials));
4865                                         #           or join('.', ...)
4866                                 }
4867                         }
4868                         print "</td>\n";
4869                 }
4870                 # 'previous' <sha1 of parent commit> <filename at commit>
4871                 if (exists $meta->{'previous'} &&
4872                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4873                         $meta->{'parent'} = $1;
4874                         $meta->{'file_parent'} = unquote($2);
4875                 }
4876                 my $linenr_commit =
4877                         exists($meta->{'parent'}) ?
4878                         $meta->{'parent'} : $full_rev;
4879                 my $linenr_filename =
4880                         exists($meta->{'file_parent'}) ?
4881                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4882                 my $blamed = href(action => 'blame',
4883                                   file_name => $linenr_filename,
4884                                   hash_base => $linenr_commit);
4885                 print "<td class=\"linenr\">";
4886                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4887                                 -class => "linenr" },
4888                               esc_html($lineno));
4889                 print "</td>";
4890                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4891                 print "</tr>\n";
4892         }
4893         print "</table>\n";
4894         print "</div>";
4895         close $fd
4896                 or print "Reading blob failed\n";
4897
4898         # page footer
4899         git_footer_html();
4900 }
4901
4902 sub git_tags {
4903         my $head = git_get_head_hash($project);
4904         git_header_html();
4905         git_print_page_nav('','', $head,undef,$head);
4906         git_print_header_div('summary', $project);
4907
4908         my @tagslist = git_get_tags_list();
4909         if (@tagslist) {
4910                 git_tags_body(\@tagslist);
4911         }
4912         git_footer_html();
4913 }
4914
4915 sub git_heads {
4916         my $head = git_get_head_hash($project);
4917         git_header_html();
4918         git_print_page_nav('','', $head,undef,$head);
4919         git_print_header_div('summary', $project);
4920
4921         my @headslist = git_get_heads_list();
4922         if (@headslist) {
4923                 git_heads_body(\@headslist, $head);
4924         }
4925         git_footer_html();
4926 }
4927
4928 sub git_blob_plain {
4929         my $type = shift;
4930         my $expires;
4931
4932         if (!defined $hash) {
4933                 if (defined $file_name) {
4934                         my $base = $hash_base || git_get_head_hash($project);
4935                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4936                                 or die_error(404, "Cannot find file");
4937                 } else {
4938                         die_error(400, "No file name defined");
4939                 }
4940         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4941                 # blobs defined by non-textual hash id's can be cached
4942                 $expires = "+1d";
4943         }
4944
4945         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4946                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4947
4948         # content-type (can include charset)
4949         $type = blob_contenttype($fd, $file_name, $type);
4950
4951         # "save as" filename, even when no $file_name is given
4952         my $save_as = "$hash";
4953         if (defined $file_name) {
4954                 $save_as = $file_name;
4955         } elsif ($type =~ m/^text\//) {
4956                 $save_as .= '.txt';
4957         }
4958
4959         # With XSS prevention on, blobs of all types except a few known safe
4960         # ones are served with "Content-Disposition: attachment" to make sure
4961         # they don't run in our security domain.  For certain image types,
4962         # blob view writes an <img> tag referring to blob_plain view, and we
4963         # want to be sure not to break that by serving the image as an
4964         # attachment (though Firefox 3 doesn't seem to care).
4965         my $sandbox = $prevent_xss &&
4966                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4967
4968         print $cgi->header(
4969                 -type => $type,
4970                 -expires => $expires,
4971                 -content_disposition =>
4972                         ($sandbox ? 'attachment' : 'inline')
4973                         . '; filename="' . $save_as . '"');
4974         local $/ = undef;
4975         binmode STDOUT, ':raw';
4976         print <$fd>;
4977         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4978         close $fd;
4979 }
4980
4981 sub git_blob {
4982         my $expires;
4983
4984         if (!defined $hash) {
4985                 if (defined $file_name) {
4986                         my $base = $hash_base || git_get_head_hash($project);
4987                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4988                                 or die_error(404, "Cannot find file");
4989                 } else {
4990                         die_error(400, "No file name defined");
4991                 }
4992         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4993                 # blobs defined by non-textual hash id's can be cached
4994                 $expires = "+1d";
4995         }
4996
4997         my $have_blame = gitweb_check_feature('blame');
4998         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4999                 or die_error(500, "Couldn't cat $file_name, $hash");
5000         my $mimetype = blob_mimetype($fd, $file_name);
5001         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5002                 close $fd;
5003                 return git_blob_plain($mimetype);
5004         }
5005         # we can have blame only for text/* mimetype
5006         $have_blame &&= ($mimetype =~ m!^text/!);
5007
5008         git_header_html(undef, $expires);
5009         my $formats_nav = '';
5010         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5011                 if (defined $file_name) {
5012                         if ($have_blame) {
5013                                 $formats_nav .=
5014                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5015                                                 "blame") .
5016                                         " | ";
5017                         }
5018                         $formats_nav .=
5019                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5020                                         "history") .
5021                                 " | " .
5022                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5023                                         "raw") .
5024                                 " | " .
5025                                 $cgi->a({-href => href(action=>"blob",
5026                                                        hash_base=>"HEAD", file_name=>$file_name)},
5027                                         "HEAD");
5028                 } else {
5029                         $formats_nav .=
5030                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5031                                         "raw");
5032                 }
5033                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5034                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5035         } else {
5036                 print "<div class=\"page_nav\">\n" .
5037                       "<br/><br/></div>\n" .
5038                       "<div class=\"title\">$hash</div>\n";
5039         }
5040         git_print_page_path($file_name, "blob", $hash_base);
5041         print "<div class=\"page_body\">\n";
5042         if ($mimetype =~ m!^image/!) {
5043                 print qq!<img type="$mimetype"!;
5044                 if ($file_name) {
5045                         print qq! alt="$file_name" title="$file_name"!;
5046                 }
5047                 print qq! src="! .
5048                       href(action=>"blob_plain", hash=>$hash,
5049                            hash_base=>$hash_base, file_name=>$file_name) .
5050                       qq!" />\n!;
5051         } else {
5052                 my $nr;
5053                 while (my $line = <$fd>) {
5054                         chomp $line;
5055                         $nr++;
5056                         $line = untabify($line);
5057                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5058                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5059                 }
5060         }
5061         close $fd
5062                 or print "Reading blob failed.\n";
5063         print "</div>";
5064         git_footer_html();
5065 }
5066
5067 sub git_tree {
5068         if (!defined $hash_base) {
5069                 $hash_base = "HEAD";
5070         }
5071         if (!defined $hash) {
5072                 if (defined $file_name) {
5073                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5074                 } else {
5075                         $hash = $hash_base;
5076                 }
5077         }
5078         die_error(404, "No such tree") unless defined($hash);
5079
5080         my @entries = ();
5081         {
5082                 local $/ = "\0";
5083                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5084                         or die_error(500, "Open git-ls-tree failed");
5085                 @entries = map { chomp; $_ } <$fd>;
5086                 close $fd
5087                         or die_error(404, "Reading tree failed");
5088         }
5089
5090         my $refs = git_get_references();
5091         my $ref = format_ref_marker($refs, $hash_base);
5092         git_header_html();
5093         my $basedir = '';
5094         my $have_blame = gitweb_check_feature('blame');
5095         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5096                 my @views_nav = ();
5097                 if (defined $file_name) {
5098                         push @views_nav,
5099                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5100                                         "history"),
5101                                 $cgi->a({-href => href(action=>"tree",
5102                                                        hash_base=>"HEAD", file_name=>$file_name)},
5103                                         "HEAD"),
5104                 }
5105                 my $snapshot_links = format_snapshot_links($hash);
5106                 if (defined $snapshot_links) {
5107                         # FIXME: Should be available when we have no hash base as well.
5108                         push @views_nav, $snapshot_links;
5109                 }
5110                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5111                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5112         } else {
5113                 undef $hash_base;
5114                 print "<div class=\"page_nav\">\n";
5115                 print "<br/><br/></div>\n";
5116                 print "<div class=\"title\">$hash</div>\n";
5117         }
5118         if (defined $file_name) {
5119                 $basedir = $file_name;
5120                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5121                         $basedir .= '/';
5122                 }
5123                 git_print_page_path($file_name, 'tree', $hash_base);
5124         }
5125         print "<div class=\"page_body\">\n";
5126         print "<table class=\"tree\">\n";
5127         my $alternate = 1;
5128         # '..' (top directory) link if possible
5129         if (defined $hash_base &&
5130             defined $file_name && $file_name =~ m![^/]+$!) {
5131                 if ($alternate) {
5132                         print "<tr class=\"dark\">\n";
5133                 } else {
5134                         print "<tr class=\"light\">\n";
5135                 }
5136                 $alternate ^= 1;
5137
5138                 my $up = $file_name;
5139                 $up =~ s!/?[^/]+$!!;
5140                 undef $up unless $up;
5141                 # based on git_print_tree_entry
5142                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5143                 print '<td class="list">';
5144                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5145                                              file_name=>$up)},
5146                               "..");
5147                 print "</td>\n";
5148                 print "<td class=\"link\"></td>\n";
5149
5150                 print "</tr>\n";
5151         }
5152         foreach my $line (@entries) {
5153                 my %t = parse_ls_tree_line($line, -z => 1);
5154
5155                 if ($alternate) {
5156                         print "<tr class=\"dark\">\n";
5157                 } else {
5158                         print "<tr class=\"light\">\n";
5159                 }
5160                 $alternate ^= 1;
5161
5162                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5163
5164                 print "</tr>\n";
5165         }
5166         print "</table>\n" .
5167               "</div>";
5168         git_footer_html();
5169 }
5170
5171 sub git_snapshot {
5172         my $format = $input_params{'snapshot_format'};
5173         if (!@snapshot_fmts) {
5174                 die_error(403, "Snapshots not allowed");
5175         }
5176         # default to first supported snapshot format
5177         $format ||= $snapshot_fmts[0];
5178         if ($format !~ m/^[a-z0-9]+$/) {
5179                 die_error(400, "Invalid snapshot format parameter");
5180         } elsif (!exists($known_snapshot_formats{$format})) {
5181                 die_error(400, "Unknown snapshot format");
5182         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5183                 die_error(403, "Unsupported snapshot format");
5184         }
5185
5186         if (!defined $hash) {
5187                 $hash = git_get_head_hash($project);
5188         }
5189
5190         my $name = $project;
5191         $name =~ s,([^/])/*\.git$,$1,;
5192         $name = basename($name);
5193         my $filename = to_utf8($name);
5194         $name =~ s/\047/\047\\\047\047/g;
5195         my $cmd;
5196         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5197         $cmd = quote_command(
5198                 git_cmd(), 'archive',
5199                 "--format=$known_snapshot_formats{$format}{'format'}",
5200                 "--prefix=$name/", $hash);
5201         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5202                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5203         }
5204
5205         print $cgi->header(
5206                 -type => $known_snapshot_formats{$format}{'type'},
5207                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5208                 -status => '200 OK');
5209
5210         open my $fd, "-|", $cmd
5211                 or die_error(500, "Execute git-archive failed");
5212         binmode STDOUT, ':raw';
5213         print <$fd>;
5214         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5215         close $fd;
5216 }
5217
5218 sub git_log {
5219         my $head = git_get_head_hash($project);
5220         if (!defined $hash) {
5221                 $hash = $head;
5222         }
5223         if (!defined $page) {
5224                 $page = 0;
5225         }
5226         my $refs = git_get_references();
5227
5228         my @commitlist = parse_commits($hash, 101, (100 * $page));
5229
5230         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5231
5232         my ($patch_max) = gitweb_get_feature('patches');
5233         if ($patch_max) {
5234                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5235                         $paging_nav .= " &sdot; " .
5236                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5237                                         "patches");
5238                 }
5239         }
5240
5241         git_header_html();
5242         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5243
5244         if (!@commitlist) {
5245                 my %co = parse_commit($hash);
5246
5247                 git_print_header_div('summary', $project);
5248                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5249         }
5250         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5251         for (my $i = 0; $i <= $to; $i++) {
5252                 my %co = %{$commitlist[$i]};
5253                 next if !%co;
5254                 my $commit = $co{'id'};
5255                 my $ref = format_ref_marker($refs, $commit);
5256                 my %ad = parse_date($co{'author_epoch'});
5257                 git_print_header_div('commit',
5258                                "<span class=\"age\">$co{'age_string'}</span>" .
5259                                esc_html($co{'title'}) . $ref,
5260                                $commit);
5261                 print "<div class=\"title_text\">\n" .
5262                       "<div class=\"log_link\">\n" .
5263                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5264                       " | " .
5265                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5266                       " | " .
5267                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5268                       "<br/>\n" .
5269                       "</div>\n";
5270                       git_print_authorship(\%co, -tag => 'span');
5271                       print "<br/>\n</div>\n";
5272
5273                 print "<div class=\"log_body\">\n";
5274                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5275                 print "</div>\n";
5276         }
5277         if ($#commitlist >= 100) {
5278                 print "<div class=\"page_nav\">\n";
5279                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5280                                -accesskey => "n", -title => "Alt-n"}, "next");
5281                 print "</div>\n";
5282         }
5283         git_footer_html();
5284 }
5285
5286 sub git_commit {
5287         $hash ||= $hash_base || "HEAD";
5288         my %co = parse_commit($hash)
5289             or die_error(404, "Unknown commit object");
5290
5291         my $parent  = $co{'parent'};
5292         my $parents = $co{'parents'}; # listref
5293
5294         # we need to prepare $formats_nav before any parameter munging
5295         my $formats_nav;
5296         if (!defined $parent) {
5297                 # --root commitdiff
5298                 $formats_nav .= '(initial)';
5299         } elsif (@$parents == 1) {
5300                 # single parent commit
5301                 $formats_nav .=
5302                         '(parent: ' .
5303                         $cgi->a({-href => href(action=>"commit",
5304                                                hash=>$parent)},
5305                                 esc_html(substr($parent, 0, 7))) .
5306                         ')';
5307         } else {
5308                 # merge commit
5309                 $formats_nav .=
5310                         '(merge: ' .
5311                         join(' ', map {
5312                                 $cgi->a({-href => href(action=>"commit",
5313                                                        hash=>$_)},
5314                                         esc_html(substr($_, 0, 7)));
5315                         } @$parents ) .
5316                         ')';
5317         }
5318         if (gitweb_check_feature('patches')) {
5319                 $formats_nav .= " | " .
5320                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5321                                 "patch");
5322         }
5323
5324         if (!defined $parent) {
5325                 $parent = "--root";
5326         }
5327         my @difftree;
5328         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5329                 @diff_opts,
5330                 (@$parents <= 1 ? $parent : '-c'),
5331                 $hash, "--"
5332                 or die_error(500, "Open git-diff-tree failed");
5333         @difftree = map { chomp; $_ } <$fd>;
5334         close $fd or die_error(404, "Reading git-diff-tree failed");
5335
5336         # non-textual hash id's can be cached
5337         my $expires;
5338         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5339                 $expires = "+1d";
5340         }
5341         my $refs = git_get_references();
5342         my $ref = format_ref_marker($refs, $co{'id'});
5343
5344         git_header_html(undef, $expires);
5345         git_print_page_nav('commit', '',
5346                            $hash, $co{'tree'}, $hash,
5347                            $formats_nav);
5348
5349         if (defined $co{'parent'}) {
5350                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5351         } else {
5352                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5353         }
5354         print "<div class=\"title_text\">\n" .
5355               "<table class=\"object_header\">\n";
5356         git_print_authorship_rows(\%co);
5357         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5358         print "<tr>" .
5359               "<td>tree</td>" .
5360               "<td class=\"sha1\">" .
5361               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5362                        class => "list"}, $co{'tree'}) .
5363               "</td>" .
5364               "<td class=\"link\">" .
5365               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5366                       "tree");
5367         my $snapshot_links = format_snapshot_links($hash);
5368         if (defined $snapshot_links) {
5369                 print " | " . $snapshot_links;
5370         }
5371         print "</td>" .
5372               "</tr>\n";
5373
5374         foreach my $par (@$parents) {
5375                 print "<tr>" .
5376                       "<td>parent</td>" .
5377                       "<td class=\"sha1\">" .
5378                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5379                                class => "list"}, $par) .
5380                       "</td>" .
5381                       "<td class=\"link\">" .
5382                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5383                       " | " .
5384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5385                       "</td>" .
5386                       "</tr>\n";
5387         }
5388         print "</table>".
5389               "</div>\n";
5390
5391         print "<div class=\"page_body\">\n";
5392         git_print_log($co{'comment'});
5393         print "</div>\n";
5394
5395         git_difftree_body(\@difftree, $hash, @$parents);
5396
5397         git_footer_html();
5398 }
5399
5400 sub git_object {
5401         # object is defined by:
5402         # - hash or hash_base alone
5403         # - hash_base and file_name
5404         my $type;
5405
5406         # - hash or hash_base alone
5407         if ($hash || ($hash_base && !defined $file_name)) {
5408                 my $object_id = $hash || $hash_base;
5409
5410                 open my $fd, "-|", quote_command(
5411                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5412                         or die_error(404, "Object does not exist");
5413                 $type = <$fd>;
5414                 chomp $type;
5415                 close $fd
5416                         or die_error(404, "Object does not exist");
5417
5418         # - hash_base and file_name
5419         } elsif ($hash_base && defined $file_name) {
5420                 $file_name =~ s,/+$,,;
5421
5422                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5423                         or die_error(404, "Base object does not exist");
5424
5425                 # here errors should not hapen
5426                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5427                         or die_error(500, "Open git-ls-tree failed");
5428                 my $line = <$fd>;
5429                 close $fd;
5430
5431                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5432                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5433                         die_error(404, "File or directory for given base does not exist");
5434                 }
5435                 $type = $2;
5436                 $hash = $3;
5437         } else {
5438                 die_error(400, "Not enough information to find object");
5439         }
5440
5441         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5442                                           hash=>$hash, hash_base=>$hash_base,
5443                                           file_name=>$file_name),
5444                              -status => '302 Found');
5445 }
5446
5447 sub git_blobdiff {
5448         my $format = shift || 'html';
5449
5450         my $fd;
5451         my @difftree;
5452         my %diffinfo;
5453         my $expires;
5454
5455         # preparing $fd and %diffinfo for git_patchset_body
5456         # new style URI
5457         if (defined $hash_base && defined $hash_parent_base) {
5458                 if (defined $file_name) {
5459                         # read raw output
5460                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5461                                 $hash_parent_base, $hash_base,
5462                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5463                                 or die_error(500, "Open git-diff-tree failed");
5464                         @difftree = map { chomp; $_ } <$fd>;
5465                         close $fd
5466                                 or die_error(404, "Reading git-diff-tree failed");
5467                         @difftree
5468                                 or die_error(404, "Blob diff not found");
5469
5470                 } elsif (defined $hash &&
5471                          $hash =~ /[0-9a-fA-F]{40}/) {
5472                         # try to find filename from $hash
5473
5474                         # read filtered raw output
5475                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5476                                 $hash_parent_base, $hash_base, "--"
5477                                 or die_error(500, "Open git-diff-tree failed");
5478                         @difftree =
5479                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5480                                 # $hash == to_id
5481                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5482                                 map { chomp; $_ } <$fd>;
5483                         close $fd
5484                                 or die_error(404, "Reading git-diff-tree failed");
5485                         @difftree
5486                                 or die_error(404, "Blob diff not found");
5487
5488                 } else {
5489                         die_error(400, "Missing one of the blob diff parameters");
5490                 }
5491
5492                 if (@difftree > 1) {
5493                         die_error(400, "Ambiguous blob diff specification");
5494                 }
5495
5496                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5497                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5498                 $file_name   ||= $diffinfo{'to_file'};
5499
5500                 $hash_parent ||= $diffinfo{'from_id'};
5501                 $hash        ||= $diffinfo{'to_id'};
5502
5503                 # non-textual hash id's can be cached
5504                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5505                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5506                         $expires = '+1d';
5507                 }
5508
5509                 # open patch output
5510                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5511                         '-p', ($format eq 'html' ? "--full-index" : ()),
5512                         $hash_parent_base, $hash_base,
5513                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5514                         or die_error(500, "Open git-diff-tree failed");
5515         }
5516
5517         # old/legacy style URI -- not generated anymore since 1.4.3.
5518         if (!%diffinfo) {
5519                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5520         }
5521
5522         # header
5523         if ($format eq 'html') {
5524                 my $formats_nav =
5525                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5526                                 "raw");
5527                 git_header_html(undef, $expires);
5528                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5529                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5530                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5531                 } else {
5532                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5533                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5534                 }
5535                 if (defined $file_name) {
5536                         git_print_page_path($file_name, "blob", $hash_base);
5537                 } else {
5538                         print "<div class=\"page_path\"></div>\n";
5539                 }
5540
5541         } elsif ($format eq 'plain') {
5542                 print $cgi->header(
5543                         -type => 'text/plain',
5544                         -charset => 'utf-8',
5545                         -expires => $expires,
5546                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5547
5548                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5549
5550         } else {
5551                 die_error(400, "Unknown blobdiff format");
5552         }
5553
5554         # patch
5555         if ($format eq 'html') {
5556                 print "<div class=\"page_body\">\n";
5557
5558                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5559                 close $fd;
5560
5561                 print "</div>\n"; # class="page_body"
5562                 git_footer_html();
5563
5564         } else {
5565                 while (my $line = <$fd>) {
5566                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5567                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5568
5569                         print $line;
5570
5571                         last if $line =~ m!^\+\+\+!;
5572                 }
5573                 local $/ = undef;
5574                 print <$fd>;
5575                 close $fd;
5576         }
5577 }
5578
5579 sub git_blobdiff_plain {
5580         git_blobdiff('plain');
5581 }
5582
5583 sub git_commitdiff {
5584         my %params = @_;
5585         my $format = $params{-format} || 'html';
5586
5587         my ($patch_max) = gitweb_get_feature('patches');
5588         if ($format eq 'patch') {
5589                 die_error(403, "Patch view not allowed") unless $patch_max;
5590         }
5591
5592         $hash ||= $hash_base || "HEAD";
5593         my %co = parse_commit($hash)
5594             or die_error(404, "Unknown commit object");
5595
5596         # choose format for commitdiff for merge
5597         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5598                 $hash_parent = '--cc';
5599         }
5600         # we need to prepare $formats_nav before almost any parameter munging
5601         my $formats_nav;
5602         if ($format eq 'html') {
5603                 $formats_nav =
5604                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5605                                 "raw");
5606                 if ($patch_max) {
5607                         $formats_nav .= " | " .
5608                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5609                                         "patch");
5610                 }
5611
5612                 if (defined $hash_parent &&
5613                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5614                         # commitdiff with two commits given
5615                         my $hash_parent_short = $hash_parent;
5616                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5617                                 $hash_parent_short = substr($hash_parent, 0, 7);
5618                         }
5619                         $formats_nav .=
5620                                 ' (from';
5621                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5622                                 if ($co{'parents'}[$i] eq $hash_parent) {
5623                                         $formats_nav .= ' parent ' . ($i+1);
5624                                         last;
5625                                 }
5626                         }
5627                         $formats_nav .= ': ' .
5628                                 $cgi->a({-href => href(action=>"commitdiff",
5629                                                        hash=>$hash_parent)},
5630                                         esc_html($hash_parent_short)) .
5631                                 ')';
5632                 } elsif (!$co{'parent'}) {
5633                         # --root commitdiff
5634                         $formats_nav .= ' (initial)';
5635                 } elsif (scalar @{$co{'parents'}} == 1) {
5636                         # single parent commit
5637                         $formats_nav .=
5638                                 ' (parent: ' .
5639                                 $cgi->a({-href => href(action=>"commitdiff",
5640                                                        hash=>$co{'parent'})},
5641                                         esc_html(substr($co{'parent'}, 0, 7))) .
5642                                 ')';
5643                 } else {
5644                         # merge commit
5645                         if ($hash_parent eq '--cc') {
5646                                 $formats_nav .= ' | ' .
5647                                         $cgi->a({-href => href(action=>"commitdiff",
5648                                                                hash=>$hash, hash_parent=>'-c')},
5649                                                 'combined');
5650                         } else { # $hash_parent eq '-c'
5651                                 $formats_nav .= ' | ' .
5652                                         $cgi->a({-href => href(action=>"commitdiff",
5653                                                                hash=>$hash, hash_parent=>'--cc')},
5654                                                 'compact');
5655                         }
5656                         $formats_nav .=
5657                                 ' (merge: ' .
5658                                 join(' ', map {
5659                                         $cgi->a({-href => href(action=>"commitdiff",
5660                                                                hash=>$_)},
5661                                                 esc_html(substr($_, 0, 7)));
5662                                 } @{$co{'parents'}} ) .
5663                                 ')';
5664                 }
5665         }
5666
5667         my $hash_parent_param = $hash_parent;
5668         if (!defined $hash_parent_param) {
5669                 # --cc for multiple parents, --root for parentless
5670                 $hash_parent_param =
5671                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5672         }
5673
5674         # read commitdiff
5675         my $fd;
5676         my @difftree;
5677         if ($format eq 'html') {
5678                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5679                         "--no-commit-id", "--patch-with-raw", "--full-index",
5680                         $hash_parent_param, $hash, "--"
5681                         or die_error(500, "Open git-diff-tree failed");
5682
5683                 while (my $line = <$fd>) {
5684                         chomp $line;
5685                         # empty line ends raw part of diff-tree output
5686                         last unless $line;
5687                         push @difftree, scalar parse_difftree_raw_line($line);
5688                 }
5689
5690         } elsif ($format eq 'plain') {
5691                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5692                         '-p', $hash_parent_param, $hash, "--"
5693                         or die_error(500, "Open git-diff-tree failed");
5694         } elsif ($format eq 'patch') {
5695                 # For commit ranges, we limit the output to the number of
5696                 # patches specified in the 'patches' feature.
5697                 # For single commits, we limit the output to a single patch,
5698                 # diverging from the git-format-patch default.
5699                 my @commit_spec = ();
5700                 if ($hash_parent) {
5701                         if ($patch_max > 0) {
5702                                 push @commit_spec, "-$patch_max";
5703                         }
5704                         push @commit_spec, '-n', "$hash_parent..$hash";
5705                 } else {
5706                         if ($params{-single}) {
5707                                 push @commit_spec, '-1';
5708                         } else {
5709                                 if ($patch_max > 0) {
5710                                         push @commit_spec, "-$patch_max";
5711                                 }
5712                                 push @commit_spec, "-n";
5713                         }
5714                         push @commit_spec, '--root', $hash;
5715                 }
5716                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5717                         '--stdout', @commit_spec
5718                         or die_error(500, "Open git-format-patch failed");
5719         } else {
5720                 die_error(400, "Unknown commitdiff format");
5721         }
5722
5723         # non-textual hash id's can be cached
5724         my $expires;
5725         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5726                 $expires = "+1d";
5727         }
5728
5729         # write commit message
5730         if ($format eq 'html') {
5731                 my $refs = git_get_references();
5732                 my $ref = format_ref_marker($refs, $co{'id'});
5733
5734                 git_header_html(undef, $expires);
5735                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5736                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5737                 print "<div class=\"title_text\">\n" .
5738                       "<table class=\"object_header\">\n";
5739                 git_print_authorship_rows(\%co);
5740                 print "</table>".
5741                       "</div>\n";
5742                 print "<div class=\"page_body\">\n";
5743                 if (@{$co{'comment'}} > 1) {
5744                         print "<div class=\"log\">\n";
5745                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5746                         print "</div>\n"; # class="log"
5747                 }
5748
5749         } elsif ($format eq 'plain') {
5750                 my $refs = git_get_references("tags");
5751                 my $tagname = git_get_rev_name_tags($hash);
5752                 my $filename = basename($project) . "-$hash.patch";
5753
5754                 print $cgi->header(
5755                         -type => 'text/plain',
5756                         -charset => 'utf-8',
5757                         -expires => $expires,
5758                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5759                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5760                 print "From: " . to_utf8($co{'author'}) . "\n";
5761                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5762                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5763
5764                 print "X-Git-Tag: $tagname\n" if $tagname;
5765                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5766
5767                 foreach my $line (@{$co{'comment'}}) {
5768                         print to_utf8($line) . "\n";
5769                 }
5770                 print "---\n\n";
5771         } elsif ($format eq 'patch') {
5772                 my $filename = basename($project) . "-$hash.patch";
5773
5774                 print $cgi->header(
5775                         -type => 'text/plain',
5776                         -charset => 'utf-8',
5777                         -expires => $expires,
5778                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5779         }
5780
5781         # write patch
5782         if ($format eq 'html') {
5783                 my $use_parents = !defined $hash_parent ||
5784                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5785                 git_difftree_body(\@difftree, $hash,
5786                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5787                 print "<br/>\n";
5788
5789                 git_patchset_body($fd, \@difftree, $hash,
5790                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5791                 close $fd;
5792                 print "</div>\n"; # class="page_body"
5793                 git_footer_html();
5794
5795         } elsif ($format eq 'plain') {
5796                 local $/ = undef;
5797                 print <$fd>;
5798                 close $fd
5799                         or print "Reading git-diff-tree failed\n";
5800         } elsif ($format eq 'patch') {
5801                 local $/ = undef;
5802                 print <$fd>;
5803                 close $fd
5804                         or print "Reading git-format-patch failed\n";
5805         }
5806 }
5807
5808 sub git_commitdiff_plain {
5809         git_commitdiff(-format => 'plain');
5810 }
5811
5812 # format-patch-style patches
5813 sub git_patch {
5814         git_commitdiff(-format => 'patch', -single=> 1);
5815 }
5816
5817 sub git_patches {
5818         git_commitdiff(-format => 'patch');
5819 }
5820
5821 sub git_history {
5822         if (!defined $hash_base) {
5823                 $hash_base = git_get_head_hash($project);
5824         }
5825         if (!defined $page) {
5826                 $page = 0;
5827         }
5828         my $ftype;
5829         my %co = parse_commit($hash_base)
5830             or die_error(404, "Unknown commit object");
5831
5832         my $refs = git_get_references();
5833         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5834
5835         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5836                                        $file_name, "--full-history")
5837             or die_error(404, "No such file or directory on given branch");
5838
5839         if (!defined $hash && defined $file_name) {
5840                 # some commits could have deleted file in question,
5841                 # and not have it in tree, but one of them has to have it
5842                 for (my $i = 0; $i <= @commitlist; $i++) {
5843                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5844                         last if defined $hash;
5845                 }
5846         }
5847         if (defined $hash) {
5848                 $ftype = git_get_type($hash);
5849         }
5850         if (!defined $ftype) {
5851                 die_error(500, "Unknown type of object");
5852         }
5853
5854         my $paging_nav = '';
5855         if ($page > 0) {
5856                 $paging_nav .=
5857                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5858                                                file_name=>$file_name)},
5859                                 "first");
5860                 $paging_nav .= " &sdot; " .
5861                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5862                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5863         } else {
5864                 $paging_nav .= "first";
5865                 $paging_nav .= " &sdot; prev";
5866         }
5867         my $next_link = '';
5868         if ($#commitlist >= 100) {
5869                 $next_link =
5870                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5871                                  -accesskey => "n", -title => "Alt-n"}, "next");
5872                 $paging_nav .= " &sdot; $next_link";
5873         } else {
5874                 $paging_nav .= " &sdot; next";
5875         }
5876
5877         git_header_html();
5878         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5879         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5880         git_print_page_path($file_name, $ftype, $hash_base);
5881
5882         git_history_body(\@commitlist, 0, 99,
5883                          $refs, $hash_base, $ftype, $next_link);
5884
5885         git_footer_html();
5886 }
5887
5888 sub git_search {
5889         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5890         if (!defined $searchtext) {
5891                 die_error(400, "Text field is empty");
5892         }
5893         if (!defined $hash) {
5894                 $hash = git_get_head_hash($project);
5895         }
5896         my %co = parse_commit($hash);
5897         if (!%co) {
5898                 die_error(404, "Unknown commit object");
5899         }
5900         if (!defined $page) {
5901                 $page = 0;
5902         }
5903
5904         $searchtype ||= 'commit';
5905         if ($searchtype eq 'pickaxe') {
5906                 # pickaxe may take all resources of your box and run for several minutes
5907                 # with every query - so decide by yourself how public you make this feature
5908                 gitweb_check_feature('pickaxe')
5909                     or die_error(403, "Pickaxe is disabled");
5910         }
5911         if ($searchtype eq 'grep') {
5912                 gitweb_check_feature('grep')
5913                     or die_error(403, "Grep is disabled");
5914         }
5915
5916         git_header_html();
5917
5918         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5919                 my $greptype;
5920                 if ($searchtype eq 'commit') {
5921                         $greptype = "--grep=";
5922                 } elsif ($searchtype eq 'author') {
5923                         $greptype = "--author=";
5924                 } elsif ($searchtype eq 'committer') {
5925                         $greptype = "--committer=";
5926                 }
5927                 $greptype .= $searchtext;
5928                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5929                                                $greptype, '--regexp-ignore-case',
5930                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5931
5932                 my $paging_nav = '';
5933                 if ($page > 0) {
5934                         $paging_nav .=
5935                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5936                                                        searchtext=>$searchtext,
5937                                                        searchtype=>$searchtype)},
5938                                         "first");
5939                         $paging_nav .= " &sdot; " .
5940                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5941                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5942                 } else {
5943                         $paging_nav .= "first";
5944                         $paging_nav .= " &sdot; prev";
5945                 }
5946                 my $next_link = '';
5947                 if ($#commitlist >= 100) {
5948                         $next_link =
5949                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5950                                          -accesskey => "n", -title => "Alt-n"}, "next");
5951                         $paging_nav .= " &sdot; $next_link";
5952                 } else {
5953                         $paging_nav .= " &sdot; next";
5954                 }
5955
5956                 if ($#commitlist >= 100) {
5957                 }
5958
5959                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5960                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5961                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5962         }
5963
5964         if ($searchtype eq 'pickaxe') {
5965                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5966                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5967
5968                 print "<table class=\"pickaxe search\">\n";
5969                 my $alternate = 1;
5970                 local $/ = "\n";
5971                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5972                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5973                         ($search_use_regexp ? '--pickaxe-regex' : ());
5974                 undef %co;
5975                 my @files;
5976                 while (my $line = <$fd>) {
5977                         chomp $line;
5978                         next unless $line;
5979
5980                         my %set = parse_difftree_raw_line($line);
5981                         if (defined $set{'commit'}) {
5982                                 # finish previous commit
5983                                 if (%co) {
5984                                         print "</td>\n" .
5985                                               "<td class=\"link\">" .
5986                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5987                                               " | " .
5988                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5989                                         print "</td>\n" .
5990                                               "</tr>\n";
5991                                 }
5992
5993                                 if ($alternate) {
5994                                         print "<tr class=\"dark\">\n";
5995                                 } else {
5996                                         print "<tr class=\"light\">\n";
5997                                 }
5998                                 $alternate ^= 1;
5999                                 %co = parse_commit($set{'commit'});
6000                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6001                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6002                                       "<td><i>$author</i></td>\n" .
6003                                       "<td>" .
6004                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6005                                               -class => "list subject"},
6006                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6007                         } elsif (defined $set{'to_id'}) {
6008                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6009
6010                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6011                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6012                                               -class => "list"},
6013                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6014                                       "<br/>\n";
6015                         }
6016                 }
6017                 close $fd;
6018
6019                 # finish last commit (warning: repetition!)
6020                 if (%co) {
6021                         print "</td>\n" .
6022                               "<td class=\"link\">" .
6023                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6024                               " | " .
6025                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6026                         print "</td>\n" .
6027                               "</tr>\n";
6028                 }
6029
6030                 print "</table>\n";
6031         }
6032
6033         if ($searchtype eq 'grep') {
6034                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6035                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6036
6037                 print "<table class=\"grep_search\">\n";
6038                 my $alternate = 1;
6039                 my $matches = 0;
6040                 local $/ = "\n";
6041                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6042                         $search_use_regexp ? ('-E', '-i') : '-F',
6043                         $searchtext, $co{'tree'};
6044                 my $lastfile = '';
6045                 while (my $line = <$fd>) {
6046                         chomp $line;
6047                         my ($file, $lno, $ltext, $binary);
6048                         last if ($matches++ > 1000);
6049                         if ($line =~ /^Binary file (.+) matches$/) {
6050                                 $file = $1;
6051                                 $binary = 1;
6052                         } else {
6053                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6054                         }
6055                         if ($file ne $lastfile) {
6056                                 $lastfile and print "</td></tr>\n";
6057                                 if ($alternate++) {
6058                                         print "<tr class=\"dark\">\n";
6059                                 } else {
6060                                         print "<tr class=\"light\">\n";
6061                                 }
6062                                 print "<td class=\"list\">".
6063                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6064                                                                file_name=>"$file"),
6065                                                 -class => "list"}, esc_path($file));
6066                                 print "</td><td>\n";
6067                                 $lastfile = $file;
6068                         }
6069                         if ($binary) {
6070                                 print "<div class=\"binary\">Binary file</div>\n";
6071                         } else {
6072                                 $ltext = untabify($ltext);
6073                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6074                                         $ltext = esc_html($1, -nbsp=>1);
6075                                         $ltext .= '<span class="match">';
6076                                         $ltext .= esc_html($2, -nbsp=>1);
6077                                         $ltext .= '</span>';
6078                                         $ltext .= esc_html($3, -nbsp=>1);
6079                                 } else {
6080                                         $ltext = esc_html($ltext, -nbsp=>1);
6081                                 }
6082                                 print "<div class=\"pre\">" .
6083                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6084                                                                file_name=>"$file").'#l'.$lno,
6085                                                 -class => "linenr"}, sprintf('%4i', $lno))
6086                                         . ' ' .  $ltext . "</div>\n";
6087                         }
6088                 }
6089                 if ($lastfile) {
6090                         print "</td></tr>\n";
6091                         if ($matches > 1000) {
6092                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6093                         }
6094                 } else {
6095                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6096                 }
6097                 close $fd;
6098
6099                 print "</table>\n";
6100         }
6101         git_footer_html();
6102 }
6103
6104 sub git_search_help {
6105         git_header_html();
6106         git_print_page_nav('','', $hash,$hash,$hash);
6107         print <<EOT;
6108 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6109 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6110 the pattern entered is recognized as the POSIX extended
6111 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6112 insensitive).</p>
6113 <dl>
6114 <dt><b>commit</b></dt>
6115 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6116 EOT
6117         my $have_grep = gitweb_check_feature('grep');
6118         if ($have_grep) {
6119                 print <<EOT;
6120 <dt><b>grep</b></dt>
6121 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6122     a different one) are searched for the given pattern. On large trees, this search can take
6123 a while and put some strain on the server, so please use it with some consideration. Note that
6124 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6125 case-sensitive.</dd>
6126 EOT
6127         }
6128         print <<EOT;
6129 <dt><b>author</b></dt>
6130 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6131 <dt><b>committer</b></dt>
6132 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6133 EOT
6134         my $have_pickaxe = gitweb_check_feature('pickaxe');
6135         if ($have_pickaxe) {
6136                 print <<EOT;
6137 <dt><b>pickaxe</b></dt>
6138 <dd>All commits that caused the string to appear or disappear from any file (changes that
6139 added, removed or "modified" the string) will be listed. This search can take a while and
6140 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6141 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6142 EOT
6143         }
6144         print "</dl>\n";
6145         git_footer_html();
6146 }
6147
6148 sub git_shortlog {
6149         my $head = git_get_head_hash($project);
6150         if (!defined $hash) {
6151                 $hash = $head;
6152         }
6153         if (!defined $page) {
6154                 $page = 0;
6155         }
6156         my $refs = git_get_references();
6157
6158         my $commit_hash = $hash;
6159         if (defined $hash_parent) {
6160                 $commit_hash = "$hash_parent..$hash";
6161         }
6162         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6163
6164         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6165         my $next_link = '';
6166         if ($#commitlist >= 100) {
6167                 $next_link =
6168                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6169                                  -accesskey => "n", -title => "Alt-n"}, "next");
6170         }
6171         my $patch_max = gitweb_check_feature('patches');
6172         if ($patch_max) {
6173                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6174                         $paging_nav .= " &sdot; " .
6175                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6176                                         "patches");
6177                 }
6178         }
6179
6180         git_header_html();
6181         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6182         git_print_header_div('summary', $project);
6183
6184         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6185
6186         git_footer_html();
6187 }
6188
6189 ## ......................................................................
6190 ## feeds (RSS, Atom; OPML)
6191
6192 sub git_feed {
6193         my $format = shift || 'atom';
6194         my $have_blame = gitweb_check_feature('blame');
6195
6196         # Atom: http://www.atomenabled.org/developers/syndication/
6197         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6198         if ($format ne 'rss' && $format ne 'atom') {
6199                 die_error(400, "Unknown web feed format");
6200         }
6201
6202         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6203         my $head = $hash || 'HEAD';
6204         my @commitlist = parse_commits($head, 150, 0, $file_name);
6205
6206         my %latest_commit;
6207         my %latest_date;
6208         my $content_type = "application/$format+xml";
6209         if (defined $cgi->http('HTTP_ACCEPT') &&
6210                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6211                 # browser (feed reader) prefers text/xml
6212                 $content_type = 'text/xml';
6213         }
6214         if (defined($commitlist[0])) {
6215                 %latest_commit = %{$commitlist[0]};
6216                 my $latest_epoch = $latest_commit{'committer_epoch'};
6217                 %latest_date   = parse_date($latest_epoch);
6218                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6219                 if (defined $if_modified) {
6220                         my $since;
6221                         if (eval { require HTTP::Date; 1; }) {
6222                                 $since = HTTP::Date::str2time($if_modified);
6223                         } elsif (eval { require Time::ParseDate; 1; }) {
6224                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6225                         }
6226                         if (defined $since && $latest_epoch <= $since) {
6227                                 print $cgi->header(
6228                                         -type => $content_type,
6229                                         -charset => 'utf-8',
6230                                         -last_modified => $latest_date{'rfc2822'},
6231                                         -status => '304 Not Modified');
6232                                 return;
6233                         }
6234                 }
6235                 print $cgi->header(
6236                         -type => $content_type,
6237                         -charset => 'utf-8',
6238                         -last_modified => $latest_date{'rfc2822'});
6239         } else {
6240                 print $cgi->header(
6241                         -type => $content_type,
6242                         -charset => 'utf-8');
6243         }
6244
6245         # Optimization: skip generating the body if client asks only
6246         # for Last-Modified date.
6247         return if ($cgi->request_method() eq 'HEAD');
6248
6249         # header variables
6250         my $title = "$site_name - $project/$action";
6251         my $feed_type = 'log';
6252         if (defined $hash) {
6253                 $title .= " - '$hash'";
6254                 $feed_type = 'branch log';
6255                 if (defined $file_name) {
6256                         $title .= " :: $file_name";
6257                         $feed_type = 'history';
6258                 }
6259         } elsif (defined $file_name) {
6260                 $title .= " - $file_name";
6261                 $feed_type = 'history';
6262         }
6263         $title .= " $feed_type";
6264         my $descr = git_get_project_description($project);
6265         if (defined $descr) {
6266                 $descr = esc_html($descr);
6267         } else {
6268                 $descr = "$project " .
6269                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6270                          " feed";
6271         }
6272         my $owner = git_get_project_owner($project);
6273         $owner = esc_html($owner);
6274
6275         #header
6276         my $alt_url;
6277         if (defined $file_name) {
6278                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6279         } elsif (defined $hash) {
6280                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6281         } else {
6282                 $alt_url = href(-full=>1, action=>"summary");
6283         }
6284         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6285         if ($format eq 'rss') {
6286                 print <<XML;
6287 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6288 <channel>
6289 XML
6290                 print "<title>$title</title>\n" .
6291                       "<link>$alt_url</link>\n" .
6292                       "<description>$descr</description>\n" .
6293                       "<language>en</language>\n" .
6294                       # project owner is responsible for 'editorial' content
6295                       "<managingEditor>$owner</managingEditor>\n";
6296                 if (defined $logo || defined $favicon) {
6297                         # prefer the logo to the favicon, since RSS
6298                         # doesn't allow both
6299                         my $img = esc_url($logo || $favicon);
6300                         print "<image>\n" .
6301                               "<url>$img</url>\n" .
6302                               "<title>$title</title>\n" .
6303                               "<link>$alt_url</link>\n" .
6304                               "</image>\n";
6305                 }
6306                 if (%latest_date) {
6307                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6308                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6309                 }
6310                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6311         } elsif ($format eq 'atom') {
6312                 print <<XML;
6313 <feed xmlns="http://www.w3.org/2005/Atom">
6314 XML
6315                 print "<title>$title</title>\n" .
6316                       "<subtitle>$descr</subtitle>\n" .
6317                       '<link rel="alternate" type="text/html" href="' .
6318                       $alt_url . '" />' . "\n" .
6319                       '<link rel="self" type="' . $content_type . '" href="' .
6320                       $cgi->self_url() . '" />' . "\n" .
6321                       "<id>" . href(-full=>1) . "</id>\n" .
6322                       # use project owner for feed author
6323                       "<author><name>$owner</name></author>\n";
6324                 if (defined $favicon) {
6325                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6326                 }
6327                 if (defined $logo_url) {
6328                         # not twice as wide as tall: 72 x 27 pixels
6329                         print "<logo>" . esc_url($logo) . "</logo>\n";
6330                 }
6331                 if (! %latest_date) {
6332                         # dummy date to keep the feed valid until commits trickle in:
6333                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6334                 } else {
6335                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6336                 }
6337                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6338         }
6339
6340         # contents
6341         for (my $i = 0; $i <= $#commitlist; $i++) {
6342                 my %co = %{$commitlist[$i]};
6343                 my $commit = $co{'id'};
6344                 # we read 150, we always show 30 and the ones more recent than 48 hours
6345                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6346                         last;
6347                 }
6348                 my %cd = parse_date($co{'author_epoch'});
6349
6350                 # get list of changed files
6351                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6352                         $co{'parent'} || "--root",
6353                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6354                         or next;
6355                 my @difftree = map { chomp; $_ } <$fd>;
6356                 close $fd
6357                         or next;
6358
6359                 # print element (entry, item)
6360                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6361                 if ($format eq 'rss') {
6362                         print "<item>\n" .
6363                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6364                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6365                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6366                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6367                               "<link>$co_url</link>\n" .
6368                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6369                               "<content:encoded>" .
6370                               "<![CDATA[\n";
6371                 } elsif ($format eq 'atom') {
6372                         print "<entry>\n" .
6373                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6374                               "<updated>$cd{'iso-8601'}</updated>\n" .
6375                               "<author>\n" .
6376                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6377                         if ($co{'author_email'}) {
6378                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6379                         }
6380                         print "</author>\n" .
6381                               # use committer for contributor
6382                               "<contributor>\n" .
6383                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6384                         if ($co{'committer_email'}) {
6385                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6386                         }
6387                         print "</contributor>\n" .
6388                               "<published>$cd{'iso-8601'}</published>\n" .
6389                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6390                               "<id>$co_url</id>\n" .
6391                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6392                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6393                 }
6394                 my $comment = $co{'comment'};
6395                 print "<pre>\n";
6396                 foreach my $line (@$comment) {
6397                         $line = esc_html($line);
6398                         print "$line\n";
6399                 }
6400                 print "</pre><ul>\n";
6401                 foreach my $difftree_line (@difftree) {
6402                         my %difftree = parse_difftree_raw_line($difftree_line);
6403                         next if !$difftree{'from_id'};
6404
6405                         my $file = $difftree{'file'} || $difftree{'to_file'};
6406
6407                         print "<li>" .
6408                               "[" .
6409                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6410                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6411                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6412                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6413                                       -title => "diff"}, 'D');
6414                         if ($have_blame) {
6415                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6416                                                              file_name=>$file, hash_base=>$commit),
6417                                               -title => "blame"}, 'B');
6418                         }
6419                         # if this is not a feed of a file history
6420                         if (!defined $file_name || $file_name ne $file) {
6421                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6422                                                              file_name=>$file, hash=>$commit),
6423                                               -title => "history"}, 'H');
6424                         }
6425                         $file = esc_path($file);
6426                         print "] ".
6427                               "$file</li>\n";
6428                 }
6429                 if ($format eq 'rss') {
6430                         print "</ul>]]>\n" .
6431                               "</content:encoded>\n" .
6432                               "</item>\n";
6433                 } elsif ($format eq 'atom') {
6434                         print "</ul>\n</div>\n" .
6435                               "</content>\n" .
6436                               "</entry>\n";
6437                 }
6438         }
6439
6440         # end of feed
6441         if ($format eq 'rss') {
6442                 print "</channel>\n</rss>\n";
6443         } elsif ($format eq 'atom') {
6444                 print "</feed>\n";
6445         }
6446 }
6447
6448 sub git_rss {
6449         git_feed('rss');
6450 }
6451
6452 sub git_atom {
6453         git_feed('atom');
6454 }
6455
6456 sub git_opml {
6457         my @list = git_get_projects_list();
6458
6459         print $cgi->header(
6460                 -type => 'text/xml',
6461                 -charset => 'utf-8',
6462                 -content_disposition => 'inline; filename="opml.xml"');
6463
6464         print <<XML;
6465 <?xml version="1.0" encoding="utf-8"?>
6466 <opml version="1.0">
6467 <head>
6468   <title>$site_name OPML Export</title>
6469 </head>
6470 <body>
6471 <outline text="git RSS feeds">
6472 XML
6473
6474         foreach my $pr (@list) {
6475                 my %proj = %$pr;
6476                 my $head = git_get_head_hash($proj{'path'});
6477                 if (!defined $head) {
6478                         next;
6479                 }
6480                 $git_dir = "$projectroot/$proj{'path'}";
6481                 my %co = parse_commit($head);
6482                 if (!%co) {
6483                         next;
6484                 }
6485
6486                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6487                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6488                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6489                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6490         }
6491         print <<XML;
6492 </outline>
6493 </body>
6494 </opml>
6495 XML
6496 }