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         #       'disabled' => boolean (optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'txz' => {
 181                 'display' => 'tar.xz',
 182                 'type' => 'application/x-xz',
 183                 'suffix' => '.tar.xz',
 184                 'format' => 'tar',
 185                 'compressor' => ['xz'],
 186                 'disabled' => 1},
 187
 188         'zip' => {
 189                 'display' => 'zip',
 190                 'type' => 'application/x-zip',
 191                 'suffix' => '.zip',
 192                 'format' => 'zip'},
 193 );
 194
 195 # Aliases so we understand old gitweb.snapshot values in repository
 196 # configuration.
 197 our %known_snapshot_format_aliases = (
 198         'gzip'  => 'tgz',
 199         'bzip2' => 'tbz2',
 200         'xz'    => 'txz',
 201
 202         # backward compatibility: legacy gitweb config support
 203         'x-gzip' => undef, 'gz' => undef,
 204         'x-bzip2' => undef, 'bz2' => undef,
 205         'x-zip' => undef, '' => undef,
 206 );
 207
 208 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 209 # are changed, it may be appropriate to change these values too via
 210 # $GITWEB_CONFIG.
 211 our %avatar_size = (
 212         'default' => 16,
 213         'double'  => 32
 214 );
 215
 216 # You define site-wide feature defaults here; override them with
 217 # $GITWEB_CONFIG as necessary.
 218 our %feature = (
 219         # feature => {
 220         #       'sub' => feature-sub (subroutine),
 221         #       'override' => allow-override (boolean),
 222         #       'default' => [ default options...] (array reference)}
 223         #
 224         # if feature is overridable (it means that allow-override has true value),
 225         # then feature-sub will be called with default options as parameters;
 226         # return value of feature-sub indicates if to enable specified feature
 227         #
 228         # if there is no 'sub' key (no feature-sub), then feature cannot be
 229         # overriden
 230         #
 231         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 232         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 233         # is enabled
 234
 235         # Enable the 'blame' blob view, showing the last commit that modified
 236         # each line in the file. This can be very CPU-intensive.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'blame'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'blame'}{'override'} = 1;
 242         # and in project config gitweb.blame = 0|1;
 243         'blame' => {
 244                 'sub' => sub { feature_bool('blame', @_) },
 245                 'override' => 0,
 246                 'default' => [0]},
 247
 248         # Enable the 'snapshot' link, providing a compressed archive of any
 249         # tree. This can potentially generate high traffic if you have large
 250         # project.
 251
 252         # Value is a list of formats defined in %known_snapshot_formats that
 253         # you wish to offer.
 254         # To disable system wide have in $GITWEB_CONFIG
 255         # $feature{'snapshot'}{'default'} = [];
 256         # To have project specific config enable override in $GITWEB_CONFIG
 257         # $feature{'snapshot'}{'override'} = 1;
 258         # and in project config, a comma-separated list of formats or "none"
 259         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 260         'snapshot' => {
 261                 'sub' => \&feature_snapshot,
 262                 'override' => 0,
 263                 'default' => ['tgz']},
 264
 265         # Enable text search, which will list the commits which match author,
 266         # committer or commit text to a given string.  Enabled by default.
 267         # Project specific override is not supported.
 268         'search' => {
 269                 'override' => 0,
 270                 'default' => [1]},
 271
 272         # Enable grep search, which will list the files in currently selected
 273         # tree containing the given string. Enabled by default. This can be
 274         # potentially CPU-intensive, of course.
 275
 276         # To enable system wide have in $GITWEB_CONFIG
 277         # $feature{'grep'}{'default'} = [1];
 278         # To have project specific config enable override in $GITWEB_CONFIG
 279         # $feature{'grep'}{'override'} = 1;
 280         # and in project config gitweb.grep = 0|1;
 281         'grep' => {
 282                 'sub' => sub { feature_bool('grep', @_) },
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable the pickaxe search, which will list the commits that modified
 287         # a given string in a file. This can be practical and quite faster
 288         # alternative to 'blame', but still potentially CPU-intensive.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pickaxe'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'pickaxe'}{'override'} = 1;
 294         # and in project config gitweb.pickaxe = 0|1;
 295         'pickaxe' => {
 296                 'sub' => sub { feature_bool('pickaxe', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable showing size of blobs in a 'tree' view, in a separate
 301         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 302
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'show-sizes'}{'default'} = [0];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'show-sizes'}{'override'} = 1;
 307         # and in project config gitweb.showsizes = 0|1;
 308         'show-sizes' => {
 309                 'sub' => sub { feature_bool('showsizes', @_) },
 310                 'override' => 0,
 311                 'default' => [1]},
 312
 313         # Make gitweb use an alternative format of the URLs which can be
 314         # more readable and natural-looking: project name is embedded
 315         # directly in the path and the query string contains other
 316         # auxiliary information. All gitweb installations recognize
 317         # URL in either format; this configures in which formats gitweb
 318         # generates links.
 319
 320         # To enable system wide have in $GITWEB_CONFIG
 321         # $feature{'pathinfo'}{'default'} = [1];
 322         # Project specific override is not supported.
 323
 324         # Note that you will need to change the default location of CSS,
 325         # favicon, logo and possibly other files to an absolute URL. Also,
 326         # if gitweb.cgi serves as your indexfile, you will need to force
 327         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 328         'pathinfo' => {
 329                 'override' => 0,
 330                 'default' => [0]},
 331
 332         # Make gitweb consider projects in project root subdirectories
 333         # to be forks of existing projects. Given project $projname.git,
 334         # projects matching $projname/*.git will not be shown in the main
 335         # projects list, instead a '+' mark will be added to $projname
 336         # there and a 'forks' view will be enabled for the project, listing
 337         # all the forks. If project list is taken from a file, forks have
 338         # to be listed after the main project.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'forks'}{'default'} = [1];
 342         # Project specific override is not supported.
 343         'forks' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Insert custom links to the action bar of all project pages.
 348         # This enables you mainly to link to third-party scripts integrating
 349         # into gitweb; e.g. git-browser for graphical history representation
 350         # or custom web-based repository administration interface.
 351
 352         # The 'default' value consists of a list of triplets in the form
 353         # (label, link, position) where position is the label after which
 354         # to insert the link and link is a format string where %n expands
 355         # to the project name, %f to the project path within the filesystem,
 356         # %h to the current hash (h gitweb parameter) and %b to the current
 357         # hash base (hb gitweb parameter); %% expands to %.
 358
 359         # To enable system wide have in $GITWEB_CONFIG e.g.
 360         # $feature{'actions'}{'default'} = [('graphiclog',
 361         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 362         # Project specific override is not supported.
 363         'actions' => {
 364                 'override' => 0,
 365                 'default' => []},
 366
 367         # Allow gitweb scan project content tags described in ctags/
 368         # of project repository, and display the popular Web 2.0-ish
 369         # "tag cloud" near the project list. Note that this is something
 370         # COMPLETELY different from the normal Git tags.
 371
 372         # gitweb by itself can show existing tags, but it does not handle
 373         # tagging itself; you need an external application for that.
 374         # For an example script, check Girocco's cgi/tagproj.cgi.
 375         # You may want to install the HTML::TagCloud Perl module to get
 376         # a pretty tag cloud instead of just a list of tags.
 377
 378         # To enable system wide have in $GITWEB_CONFIG
 379         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 380         # Project specific override is not supported.
 381         'ctags' => {
 382                 'override' => 0,
 383                 'default' => [0]},
 384
 385         # The maximum number of patches in a patchset generated in patch
 386         # view. Set this to 0 or undef to disable patch view, or to a
 387         # negative number to remove any limit.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'patches'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'patches'}{'override'} = 1;
 393         # and in project config gitweb.patches = 0|n;
 394         # where n is the maximum number of patches allowed in a patchset.
 395         'patches' => {
 396                 'sub' => \&feature_patches,
 397                 'override' => 0,
 398                 'default' => [16]},
 399
 400         # Avatar support. When this feature is enabled, views such as
 401         # shortlog or commit will display an avatar associated with
 402         # the email of the committer(s) and/or author(s).
 403
 404         # Currently available providers are gravatar and picon.
 405         # If an unknown provider is specified, the feature is disabled.
 406
 407         # Gravatar depends on Digest::MD5.
 408         # Picon currently relies on the indiana.edu database.
 409
 410         # To enable system wide have in $GITWEB_CONFIG
 411         # $feature{'avatar'}{'default'} = ['<provider>'];
 412         # where <provider> is either gravatar or picon.
 413         # To have project specific config enable override in $GITWEB_CONFIG
 414         # $feature{'avatar'}{'override'} = 1;
 415         # and in project config gitweb.avatar = <provider>;
 416         'avatar' => {
 417                 'sub' => \&feature_avatar,
 418                 'override' => 0,
 419                 'default' => ['']},
 420 );
 421
 422 sub gitweb_get_feature {
 423         my ($name) = @_;
 424         return unless exists $feature{$name};
 425         my ($sub, $override, @defaults) = (
 426                 $feature{$name}{'sub'},
 427                 $feature{$name}{'override'},
 428                 @{$feature{$name}{'default'}});
 429         if (!$override) { return @defaults; }
 430         if (!defined $sub) {
 431                 warn "feature $name is not overridable";
 432                 return @defaults;
 433         }
 434         return $sub->(@defaults);
 435 }
 436
 437 # A wrapper to check if a given feature is enabled.
 438 # With this, you can say
 439 #
 440 #   my $bool_feat = gitweb_check_feature('bool_feat');
 441 #   gitweb_check_feature('bool_feat') or somecode;
 442 #
 443 # instead of
 444 #
 445 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 446 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 447 #
 448 sub gitweb_check_feature {
 449         return (gitweb_get_feature(@_))[0];
 450 }
 451
 452
 453 sub feature_bool {
 454         my $key = shift;
 455         my ($val) = git_get_project_config($key, '--bool');
 456
 457         if (!defined $val) {
 458                 return ($_[0]);
 459         } elsif ($val eq 'true') {
 460                 return (1);
 461         } elsif ($val eq 'false') {
 462                 return (0);
 463         }
 464 }
 465
 466 sub feature_snapshot {
 467         my (@fmts) = @_;
 468
 469         my ($val) = git_get_project_config('snapshot');
 470
 471         if ($val) {
 472                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 473         }
 474
 475         return @fmts;
 476 }
 477
 478 sub feature_patches {
 479         my @val = (git_get_project_config('patches', '--int'));
 480
 481         if (@val) {
 482                 return @val;
 483         }
 484
 485         return ($_[0]);
 486 }
 487
 488 sub feature_avatar {
 489         my @val = (git_get_project_config('avatar'));
 490
 491         return @val ? @val : @_;
 492 }
 493
 494 # checking HEAD file with -e is fragile if the repository was
 495 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 496 # and then pruned.
 497 sub check_head_link {
 498         my ($dir) = @_;
 499         my $headfile = "$dir/HEAD";
 500         return ((-e $headfile) ||
 501                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 502 }
 503
 504 sub check_export_ok {
 505         my ($dir) = @_;
 506         return (check_head_link($dir) &&
 507                 (!$export_ok || -e "$dir/$export_ok") &&
 508                 (!$export_auth_hook || $export_auth_hook->($dir)));
 509 }
 510
 511 # process alternate names for backward compatibility
 512 # filter out unsupported (unknown) snapshot formats
 513 sub filter_snapshot_fmts {
 514         my @fmts = @_;
 515
 516         @fmts = map {
 517                 exists $known_snapshot_format_aliases{$_} ?
 518                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 519         @fmts = grep {
 520                 exists $known_snapshot_formats{$_} &&
 521                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 522 }
 523
 524 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 525 if (-e $GITWEB_CONFIG) {
 526         do $GITWEB_CONFIG;
 527 } else {
 528         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 529         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 530 }
 531
 532 # version of the core git binary
 533 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 534
 535 $projects_list ||= $projectroot;
 536
 537 # ======================================================================
 538 # input validation and dispatch
 539
 540 # input parameters can be collected from a variety of sources (presently, CGI
 541 # and PATH_INFO), so we define an %input_params hash that collects them all
 542 # together during validation: this allows subsequent uses (e.g. href()) to be
 543 # agnostic of the parameter origin
 544
 545 our %input_params = ();
 546
 547 # input parameters are stored with the long parameter name as key. This will
 548 # also be used in the href subroutine to convert parameters to their CGI
 549 # equivalent, and since the href() usage is the most frequent one, we store
 550 # the name -> CGI key mapping here, instead of the reverse.
 551 #
 552 # XXX: Warning: If you touch this, check the search form for updating,
 553 # too.
 554
 555 our @cgi_param_mapping = (
 556         project => "p",
 557         action => "a",
 558         file_name => "f",
 559         file_parent => "fp",
 560         hash => "h",
 561         hash_parent => "hp",
 562         hash_base => "hb",
 563         hash_parent_base => "hpb",
 564         page => "pg",
 565         order => "o",
 566         searchtext => "s",
 567         searchtype => "st",
 568         snapshot_format => "sf",
 569         extra_options => "opt",
 570         search_use_regexp => "sr",
 571 );
 572 our %cgi_param_mapping = @cgi_param_mapping;
 573
 574 # we will also need to know the possible actions, for validation
 575 our %actions = (
 576         "blame" => \&git_blame,
 577         "blobdiff" => \&git_blobdiff,
 578         "blobdiff_plain" => \&git_blobdiff_plain,
 579         "blob" => \&git_blob,
 580         "blob_plain" => \&git_blob_plain,
 581         "commitdiff" => \&git_commitdiff,
 582         "commitdiff_plain" => \&git_commitdiff_plain,
 583         "commit" => \&git_commit,
 584         "forks" => \&git_forks,
 585         "heads" => \&git_heads,
 586         "history" => \&git_history,
 587         "log" => \&git_log,
 588         "patch" => \&git_patch,
 589         "patches" => \&git_patches,
 590         "rss" => \&git_rss,
 591         "atom" => \&git_atom,
 592         "search" => \&git_search,
 593         "search_help" => \&git_search_help,
 594         "shortlog" => \&git_shortlog,
 595         "summary" => \&git_summary,
 596         "tag" => \&git_tag,
 597         "tags" => \&git_tags,
 598         "tree" => \&git_tree,
 599         "snapshot" => \&git_snapshot,
 600         "object" => \&git_object,
 601         # those below don't need $project
 602         "opml" => \&git_opml,
 603         "project_list" => \&git_project_list,
 604         "project_index" => \&git_project_index,
 605 );
 606
 607 # finally, we have the hash of allowed extra_options for the commands that
 608 # allow them
 609 our %allowed_options = (
 610         "--no-merges" => [ qw(rss atom log shortlog history) ],
 611 );
 612
 613 # fill %input_params with the CGI parameters. All values except for 'opt'
 614 # should be single values, but opt can be an array. We should probably
 615 # build an array of parameters that can be multi-valued, but since for the time
 616 # being it's only this one, we just single it out
 617 while (my ($name, $symbol) = each %cgi_param_mapping) {
 618         if ($symbol eq 'opt') {
 619                 $input_params{$name} = [ $cgi->param($symbol) ];
 620         } else {
 621                 $input_params{$name} = $cgi->param($symbol);
 622         }
 623 }
 624
 625 # now read PATH_INFO and update the parameter list for missing parameters
 626 sub evaluate_path_info {
 627         return if defined $input_params{'project'};
 628         return if !$path_info;
 629         $path_info =~ s,^/+,,;
 630         return if !$path_info;
 631
 632         # find which part of PATH_INFO is project
 633         my $project = $path_info;
 634         $project =~ s,/+$,,;
 635         while ($project && !check_head_link("$projectroot/$project")) {
 636                 $project =~ s,/*[^/]*$,,;
 637         }
 638         return unless $project;
 639         $input_params{'project'} = $project;
 640
 641         # do not change any parameters if an action is given using the query string
 642         return if $input_params{'action'};
 643         $path_info =~ s,^\Q$project\E/*,,;
 644
 645         # next, check if we have an action
 646         my $action = $path_info;
 647         $action =~ s,/.*$,,;
 648         if (exists $actions{$action}) {
 649                 $path_info =~ s,^$action/*,,;
 650                 $input_params{'action'} = $action;
 651         }
 652
 653         # list of actions that want hash_base instead of hash, but can have no
 654         # pathname (f) parameter
 655         my @wants_base = (
 656                 'tree',
 657                 'history',
 658         );
 659
 660         # we want to catch
 661         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 662         my ($parentrefname, $parentpathname, $refname, $pathname) =
 663                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 664
 665         # first, analyze the 'current' part
 666         if (defined $pathname) {
 667                 # we got "branch:filename" or "branch:dir/"
 668                 # we could use git_get_type(branch:pathname), but:
 669                 # - it needs $git_dir
 670                 # - it does a git() call
 671                 # - the convention of terminating directories with a slash
 672                 #   makes it superfluous
 673                 # - embedding the action in the PATH_INFO would make it even
 674                 #   more superfluous
 675                 $pathname =~ s,^/+,,;
 676                 if (!$pathname || substr($pathname, -1) eq "/") {
 677                         $input_params{'action'} ||= "tree";
 678                         $pathname =~ s,/$,,;
 679                 } else {
 680                         # the default action depends on whether we had parent info
 681                         # or not
 682                         if ($parentrefname) {
 683                                 $input_params{'action'} ||= "blobdiff_plain";
 684                         } else {
 685                                 $input_params{'action'} ||= "blob_plain";
 686                         }
 687                 }
 688                 $input_params{'hash_base'} ||= $refname;
 689                 $input_params{'file_name'} ||= $pathname;
 690         } elsif (defined $refname) {
 691                 # we got "branch". In this case we have to choose if we have to
 692                 # set hash or hash_base.
 693                 #
 694                 # Most of the actions without a pathname only want hash to be
 695                 # set, except for the ones specified in @wants_base that want
 696                 # hash_base instead. It should also be noted that hand-crafted
 697                 # links having 'history' as an action and no pathname or hash
 698                 # set will fail, but that happens regardless of PATH_INFO.
 699                 $input_params{'action'} ||= "shortlog";
 700                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 701                         $input_params{'hash_base'} ||= $refname;
 702                 } else {
 703                         $input_params{'hash'} ||= $refname;
 704                 }
 705         }
 706
 707         # next, handle the 'parent' part, if present
 708         if (defined $parentrefname) {
 709                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 710                 # someproject/blobdiff/oldrev..newrev:/filename
 711                 if ($parentpathname) {
 712                         $parentpathname =~ s,^/+,,;
 713                         $parentpathname =~ s,/$,,;
 714                         $input_params{'file_parent'} ||= $parentpathname;
 715                 } else {
 716                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 717                 }
 718                 # we assume that hash_parent_base is wanted if a path was specified,
 719                 # or if the action wants hash_base instead of hash
 720                 if (defined $input_params{'file_parent'} ||
 721                         grep { $_ eq $input_params{'action'} } @wants_base) {
 722                         $input_params{'hash_parent_base'} ||= $parentrefname;
 723                 } else {
 724                         $input_params{'hash_parent'} ||= $parentrefname;
 725                 }
 726         }
 727
 728         # for the snapshot action, we allow URLs in the form
 729         # $project/snapshot/$hash.ext
 730         # where .ext determines the snapshot and gets removed from the
 731         # passed $refname to provide the $hash.
 732         #
 733         # To be able to tell that $refname includes the format extension, we
 734         # require the following two conditions to be satisfied:
 735         # - the hash input parameter MUST have been set from the $refname part
 736         #   of the URL (i.e. they must be equal)
 737         # - the snapshot format MUST NOT have been defined already (e.g. from
 738         #   CGI parameter sf)
 739         # It's also useless to try any matching unless $refname has a dot,
 740         # so we check for that too
 741         if (defined $input_params{'action'} &&
 742                 $input_params{'action'} eq 'snapshot' &&
 743                 defined $refname && index($refname, '.') != -1 &&
 744                 $refname eq $input_params{'hash'} &&
 745                 !defined $input_params{'snapshot_format'}) {
 746                 # We loop over the known snapshot formats, checking for
 747                 # extensions. Allowed extensions are both the defined suffix
 748                 # (which includes the initial dot already) and the snapshot
 749                 # format key itself, with a prepended dot
 750                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 751                         my $hash = $refname;
 752                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 753                                 next;
 754                         }
 755                         my $sfx = $1;
 756                         # a valid suffix was found, so set the snapshot format
 757                         # and reset the hash parameter
 758                         $input_params{'snapshot_format'} = $fmt;
 759                         $input_params{'hash'} = $hash;
 760                         # we also set the format suffix to the one requested
 761                         # in the URL: this way a request for e.g. .tgz returns
 762                         # a .tgz instead of a .tar.gz
 763                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 764                         last;
 765                 }
 766         }
 767 }
 768 evaluate_path_info();
 769
 770 our $action = $input_params{'action'};
 771 if (defined $action) {
 772         if (!validate_action($action)) {
 773                 die_error(400, "Invalid action parameter");
 774         }
 775 }
 776
 777 # parameters which are pathnames
 778 our $project = $input_params{'project'};
 779 if (defined $project) {
 780         if (!validate_project($project)) {
 781                 undef $project;
 782                 die_error(404, "No such project");
 783         }
 784 }
 785
 786 our $file_name = $input_params{'file_name'};
 787 if (defined $file_name) {
 788         if (!validate_pathname($file_name)) {
 789                 die_error(400, "Invalid file parameter");
 790         }
 791 }
 792
 793 our $file_parent = $input_params{'file_parent'};
 794 if (defined $file_parent) {
 795         if (!validate_pathname($file_parent)) {
 796                 die_error(400, "Invalid file parent parameter");
 797         }
 798 }
 799
 800 # parameters which are refnames
 801 our $hash = $input_params{'hash'};
 802 if (defined $hash) {
 803         if (!validate_refname($hash)) {
 804                 die_error(400, "Invalid hash parameter");
 805         }
 806 }
 807
 808 our $hash_parent = $input_params{'hash_parent'};
 809 if (defined $hash_parent) {
 810         if (!validate_refname($hash_parent)) {
 811                 die_error(400, "Invalid hash parent parameter");
 812         }
 813 }
 814
 815 our $hash_base = $input_params{'hash_base'};
 816 if (defined $hash_base) {
 817         if (!validate_refname($hash_base)) {
 818                 die_error(400, "Invalid hash base parameter");
 819         }
 820 }
 821
 822 our @extra_options = @{$input_params{'extra_options'}};
 823 # @extra_options is always defined, since it can only be (currently) set from
 824 # CGI, and $cgi->param() returns the empty array in array context if the param
 825 # is not set
 826 foreach my $opt (@extra_options) {
 827         if (not exists $allowed_options{$opt}) {
 828                 die_error(400, "Invalid option parameter");
 829         }
 830         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 831                 die_error(400, "Invalid option parameter for this action");
 832         }
 833 }
 834
 835 our $hash_parent_base = $input_params{'hash_parent_base'};
 836 if (defined $hash_parent_base) {
 837         if (!validate_refname($hash_parent_base)) {
 838                 die_error(400, "Invalid hash parent base parameter");
 839         }
 840 }
 841
 842 # other parameters
 843 our $page = $input_params{'page'};
 844 if (defined $page) {
 845         if ($page =~ m/[^0-9]/) {
 846                 die_error(400, "Invalid page parameter");
 847         }
 848 }
 849
 850 our $searchtype = $input_params{'searchtype'};
 851 if (defined $searchtype) {
 852         if ($searchtype =~ m/[^a-z]/) {
 853                 die_error(400, "Invalid searchtype parameter");
 854         }
 855 }
 856
 857 our $search_use_regexp = $input_params{'search_use_regexp'};
 858
 859 our $searchtext = $input_params{'searchtext'};
 860 our $search_regexp;
 861 if (defined $searchtext) {
 862         if (length($searchtext) < 2) {
 863                 die_error(403, "At least two characters are required for search parameter");
 864         }
 865         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 866 }
 867
 868 # path to the current git repository
 869 our $git_dir;
 870 $git_dir = "$projectroot/$project" if $project;
 871
 872 # list of supported snapshot formats
 873 our @snapshot_fmts = gitweb_get_feature('snapshot');
 874 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 875
 876 # check that the avatar feature is set to a known provider name,
 877 # and for each provider check if the dependencies are satisfied.
 878 # if the provider name is invalid or the dependencies are not met,
 879 # reset $git_avatar to the empty string.
 880 our ($git_avatar) = gitweb_get_feature('avatar');
 881 if ($git_avatar eq 'gravatar') {
 882         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 883 } elsif ($git_avatar eq 'picon') {
 884         # no dependencies
 885 } else {
 886         $git_avatar = '';
 887 }
 888
 889 # dispatch
 890 if (!defined $action) {
 891         if (defined $hash) {
 892                 $action = git_get_type($hash);
 893         } elsif (defined $hash_base && defined $file_name) {
 894                 $action = git_get_type("$hash_base:$file_name");
 895         } elsif (defined $project) {
 896                 $action = 'summary';
 897         } else {
 898                 $action = 'project_list';
 899         }
 900 }
 901 if (!defined($actions{$action})) {
 902         die_error(400, "Unknown action");
 903 }
 904 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 905     !$project) {
 906         die_error(400, "Project needed");
 907 }
 908 $actions{$action}->();
 909 exit;
 910
 911 ## ======================================================================
 912 ## action links
 913
 914 sub href {
 915         my %params = @_;
 916         # default is to use -absolute url() i.e. $my_uri
 917         my $href = $params{-full} ? $my_url : $my_uri;
 918
 919         $params{'project'} = $project unless exists $params{'project'};
 920
 921         if ($params{-replay}) {
 922                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 923                         if (!exists $params{$name}) {
 924                                 $params{$name} = $input_params{$name};
 925                         }
 926                 }
 927         }
 928
 929         my $use_pathinfo = gitweb_check_feature('pathinfo');
 930         if ($use_pathinfo and defined $params{'project'}) {
 931                 # try to put as many parameters as possible in PATH_INFO:
 932                 #   - project name
 933                 #   - action
 934                 #   - hash_parent or hash_parent_base:/file_parent
 935                 #   - hash or hash_base:/filename
 936                 #   - the snapshot_format as an appropriate suffix
 937
 938                 # When the script is the root DirectoryIndex for the domain,
 939                 # $href here would be something like http://gitweb.example.com/
 940                 # Thus, we strip any trailing / from $href, to spare us double
 941                 # slashes in the final URL
 942                 $href =~ s,/$,,;
 943
 944                 # Then add the project name, if present
 945                 $href .= "/".esc_url($params{'project'});
 946                 delete $params{'project'};
 947
 948                 # since we destructively absorb parameters, we keep this
 949                 # boolean that remembers if we're handling a snapshot
 950                 my $is_snapshot = $params{'action'} eq 'snapshot';
 951
 952                 # Summary just uses the project path URL, any other action is
 953                 # added to the URL
 954                 if (defined $params{'action'}) {
 955                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 956                         delete $params{'action'};
 957                 }
 958
 959                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 960                 # stripping nonexistent or useless pieces
 961                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 962                         || $params{'hash_parent'} || $params{'hash'});
 963                 if (defined $params{'hash_base'}) {
 964                         if (defined $params{'hash_parent_base'}) {
 965                                 $href .= esc_url($params{'hash_parent_base'});
 966                                 # skip the file_parent if it's the same as the file_name
 967                                 if (defined $params{'file_parent'}) {
 968                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 969                                                 delete $params{'file_parent'};
 970                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 971                                                 $href .= ":/".esc_url($params{'file_parent'});
 972                                                 delete $params{'file_parent'};
 973                                         }
 974                                 }
 975                                 $href .= "..";
 976                                 delete $params{'hash_parent'};
 977                                 delete $params{'hash_parent_base'};
 978                         } elsif (defined $params{'hash_parent'}) {
 979                                 $href .= esc_url($params{'hash_parent'}). "..";
 980                                 delete $params{'hash_parent'};
 981                         }
 982
 983                         $href .= esc_url($params{'hash_base'});
 984                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 985                                 $href .= ":/".esc_url($params{'file_name'});
 986                                 delete $params{'file_name'};
 987                         }
 988                         delete $params{'hash'};
 989                         delete $params{'hash_base'};
 990                 } elsif (defined $params{'hash'}) {
 991                         $href .= esc_url($params{'hash'});
 992                         delete $params{'hash'};
 993                 }
 994
 995                 # If the action was a snapshot, we can absorb the
 996                 # snapshot_format parameter too
 997                 if ($is_snapshot) {
 998                         my $fmt = $params{'snapshot_format'};
 999                         # snapshot_format should always be defined when href()
1000                         # is called, but just in case some code forgets, we
1001                         # fall back to the default
1002                         $fmt ||= $snapshot_fmts[0];
1003                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1004                         delete $params{'snapshot_format'};
1005                 }
1006         }
1007
1008         # now encode the parameters explicitly
1009         my @result = ();
1010         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1011                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1012                 if (defined $params{$name}) {
1013                         if (ref($params{$name}) eq "ARRAY") {
1014                                 foreach my $par (@{$params{$name}}) {
1015                                         push @result, $symbol . "=" . esc_param($par);
1016                                 }
1017                         } else {
1018                                 push @result, $symbol . "=" . esc_param($params{$name});
1019                         }
1020                 }
1021         }
1022         $href .= "?" . join(';', @result) if scalar @result;
1023
1024         return $href;
1025 }
1026
1027
1028 ## ======================================================================
1029 ## validation, quoting/unquoting and escaping
1030
1031 sub validate_action {
1032         my $input = shift || return undef;
1033         return undef unless exists $actions{$input};
1034         return $input;
1035 }
1036
1037 sub validate_project {
1038         my $input = shift || return undef;
1039         if (!validate_pathname($input) ||
1040                 !(-d "$projectroot/$input") ||
1041                 !check_export_ok("$projectroot/$input") ||
1042                 ($strict_export && !project_in_list($input))) {
1043                 return undef;
1044         } else {
1045                 return $input;
1046         }
1047 }
1048
1049 sub validate_pathname {
1050         my $input = shift || return undef;
1051
1052         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1053         # at the beginning, at the end, and between slashes.
1054         # also this catches doubled slashes
1055         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1056                 return undef;
1057         }
1058         # no null characters
1059         if ($input =~ m!\0!) {
1060                 return undef;
1061         }
1062         return $input;
1063 }
1064
1065 sub validate_refname {
1066         my $input = shift || return undef;
1067
1068         # textual hashes are O.K.
1069         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1070                 return $input;
1071         }
1072         # it must be correct pathname
1073         $input = validate_pathname($input)
1074                 or return undef;
1075         # restrictions on ref name according to git-check-ref-format
1076         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1077                 return undef;
1078         }
1079         return $input;
1080 }
1081
1082 # decode sequences of octets in utf8 into Perl's internal form,
1083 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1084 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1085 sub to_utf8 {
1086         my $str = shift;
1087         if (utf8::valid($str)) {
1088                 utf8::decode($str);
1089                 return $str;
1090         } else {
1091                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1092         }
1093 }
1094
1095 # quote unsafe chars, but keep the slash, even when it's not
1096 # correct, but quoted slashes look too horrible in bookmarks
1097 sub esc_param {
1098         my $str = shift;
1099         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1100         $str =~ s/ /\+/g;
1101         return $str;
1102 }
1103
1104 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1105 sub esc_url {
1106         my $str = shift;
1107         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1108         $str =~ s/\+/%2B/g;
1109         $str =~ s/ /\+/g;
1110         return $str;
1111 }
1112
1113 # replace invalid utf8 character with SUBSTITUTION sequence
1114 sub esc_html {
1115         my $str = shift;
1116         my %opts = @_;
1117
1118         $str = to_utf8($str);
1119         $str = $cgi->escapeHTML($str);
1120         if ($opts{'-nbsp'}) {
1121                 $str =~ s/ /&nbsp;/g;
1122         }
1123         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1124         return $str;
1125 }
1126
1127 # quote control characters and escape filename to HTML
1128 sub esc_path {
1129         my $str = shift;
1130         my %opts = @_;
1131
1132         $str = to_utf8($str);
1133         $str = $cgi->escapeHTML($str);
1134         if ($opts{'-nbsp'}) {
1135                 $str =~ s/ /&nbsp;/g;
1136         }
1137         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1138         return $str;
1139 }
1140
1141 # Make control characters "printable", using character escape codes (CEC)
1142 sub quot_cec {
1143         my $cntrl = shift;
1144         my %opts = @_;
1145         my %es = ( # character escape codes, aka escape sequences
1146                 "\t" => '\t',   # tab            (HT)
1147                 "\n" => '\n',   # line feed      (LF)
1148                 "\r" => '\r',   # carrige return (CR)
1149                 "\f" => '\f',   # form feed      (FF)
1150                 "\b" => '\b',   # backspace      (BS)
1151                 "\a" => '\a',   # alarm (bell)   (BEL)
1152                 "\e" => '\e',   # escape         (ESC)
1153                 "\013" => '\v', # vertical tab   (VT)
1154                 "\000" => '\0', # nul character  (NUL)
1155         );
1156         my $chr = ( (exists $es{$cntrl})
1157                     ? $es{$cntrl}
1158                     : sprintf('\%2x', ord($cntrl)) );
1159         if ($opts{-nohtml}) {
1160                 return $chr;
1161         } else {
1162                 return "<span class=\"cntrl\">$chr</span>";
1163         }
1164 }
1165
1166 # Alternatively use unicode control pictures codepoints,
1167 # Unicode "printable representation" (PR)
1168 sub quot_upr {
1169         my $cntrl = shift;
1170         my %opts = @_;
1171
1172         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1173         if ($opts{-nohtml}) {
1174                 return $chr;
1175         } else {
1176                 return "<span class=\"cntrl\">$chr</span>";
1177         }
1178 }
1179
1180 # git may return quoted and escaped filenames
1181 sub unquote {
1182         my $str = shift;
1183
1184         sub unq {
1185                 my $seq = shift;
1186                 my %es = ( # character escape codes, aka escape sequences
1187                         't' => "\t",   # tab            (HT, TAB)
1188                         'n' => "\n",   # newline        (NL)
1189                         'r' => "\r",   # return         (CR)
1190                         'f' => "\f",   # form feed      (FF)
1191                         'b' => "\b",   # backspace      (BS)
1192                         'a' => "\a",   # alarm (bell)   (BEL)
1193                         'e' => "\e",   # escape         (ESC)
1194                         'v' => "\013", # vertical tab   (VT)
1195                 );
1196
1197                 if ($seq =~ m/^[0-7]{1,3}$/) {
1198                         # octal char sequence
1199                         return chr(oct($seq));
1200                 } elsif (exists $es{$seq}) {
1201                         # C escape sequence, aka character escape code
1202                         return $es{$seq};
1203                 }
1204                 # quoted ordinary character
1205                 return $seq;
1206         }
1207
1208         if ($str =~ m/^"(.*)"$/) {
1209                 # needs unquoting
1210                 $str = $1;
1211                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1212         }
1213         return $str;
1214 }
1215
1216 # escape tabs (convert tabs to spaces)
1217 sub untabify {
1218         my $line = shift;
1219
1220         while ((my $pos = index($line, "\t")) != -1) {
1221                 if (my $count = (8 - ($pos % 8))) {
1222                         my $spaces = ' ' x $count;
1223                         $line =~ s/\t/$spaces/;
1224                 }
1225         }
1226
1227         return $line;
1228 }
1229
1230 sub project_in_list {
1231         my $project = shift;
1232         my @list = git_get_projects_list();
1233         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1234 }
1235
1236 ## ----------------------------------------------------------------------
1237 ## HTML aware string manipulation
1238
1239 # Try to chop given string on a word boundary between position
1240 # $len and $len+$add_len. If there is no word boundary there,
1241 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1242 # (marking chopped part) would be longer than given string.
1243 sub chop_str {
1244         my $str = shift;
1245         my $len = shift;
1246         my $add_len = shift || 10;
1247         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1248
1249         # Make sure perl knows it is utf8 encoded so we don't
1250         # cut in the middle of a utf8 multibyte char.
1251         $str = to_utf8($str);
1252
1253         # allow only $len chars, but don't cut a word if it would fit in $add_len
1254         # if it doesn't fit, cut it if it's still longer than the dots we would add
1255         # remove chopped character entities entirely
1256
1257         # when chopping in the middle, distribute $len into left and right part
1258         # return early if chopping wouldn't make string shorter
1259         if ($where eq 'center') {
1260                 return $str if ($len + 5 >= length($str)); # filler is length 5
1261                 $len = int($len/2);
1262         } else {
1263                 return $str if ($len + 4 >= length($str)); # filler is length 4
1264         }
1265
1266         # regexps: ending and beginning with word part up to $add_len
1267         my $endre = qr/.{$len}\w{0,$add_len}/;
1268         my $begre = qr/\w{0,$add_len}.{$len}/;
1269
1270         if ($where eq 'left') {
1271                 $str =~ m/^(.*?)($begre)$/;
1272                 my ($lead, $body) = ($1, $2);
1273                 if (length($lead) > 4) {
1274                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1275                         $lead = " ...";
1276                 }
1277                 return "$lead$body";
1278
1279         } elsif ($where eq 'center') {
1280                 $str =~ m/^($endre)(.*)$/;
1281                 my ($left, $str)  = ($1, $2);
1282                 $str =~ m/^(.*?)($begre)$/;
1283                 my ($mid, $right) = ($1, $2);
1284                 if (length($mid) > 5) {
1285                         $left  =~ s/&[^;]*$//;
1286                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1287                         $mid = " ... ";
1288                 }
1289                 return "$left$mid$right";
1290
1291         } else {
1292                 $str =~ m/^($endre)(.*)$/;
1293                 my $body = $1;
1294                 my $tail = $2;
1295                 if (length($tail) > 4) {
1296                         $body =~ s/&[^;]*$//;
1297                         $tail = "... ";
1298                 }
1299                 return "$body$tail";
1300         }
1301 }
1302
1303 # takes the same arguments as chop_str, but also wraps a <span> around the
1304 # result with a title attribute if it does get chopped. Additionally, the
1305 # string is HTML-escaped.
1306 sub chop_and_escape_str {
1307         my ($str) = @_;
1308
1309         my $chopped = chop_str(@_);
1310         if ($chopped eq $str) {
1311                 return esc_html($chopped);
1312         } else {
1313                 $str =~ s/[[:cntrl:]]/?/g;
1314                 return $cgi->span({-title=>$str}, esc_html($chopped));
1315         }
1316 }
1317
1318 ## ----------------------------------------------------------------------
1319 ## functions returning short strings
1320
1321 # CSS class for given age value (in seconds)
1322 sub age_class {
1323         my $age = shift;
1324
1325         if (!defined $age) {
1326                 return "noage";
1327         } elsif ($age < 60*60*2) {
1328                 return "age0";
1329         } elsif ($age < 60*60*24*2) {
1330                 return "age1";
1331         } else {
1332                 return "age2";
1333         }
1334 }
1335
1336 # convert age in seconds to "nn units ago" string
1337 sub age_string {
1338         my $age = shift;
1339         my $age_str;
1340
1341         if ($age > 60*60*24*365*2) {
1342                 $age_str = (int $age/60/60/24/365);
1343                 $age_str .= " years ago";
1344         } elsif ($age > 60*60*24*(365/12)*2) {
1345                 $age_str = int $age/60/60/24/(365/12);
1346                 $age_str .= " months ago";
1347         } elsif ($age > 60*60*24*7*2) {
1348                 $age_str = int $age/60/60/24/7;
1349                 $age_str .= " weeks ago";
1350         } elsif ($age > 60*60*24*2) {
1351                 $age_str = int $age/60/60/24;
1352                 $age_str .= " days ago";
1353         } elsif ($age > 60*60*2) {
1354                 $age_str = int $age/60/60;
1355                 $age_str .= " hours ago";
1356         } elsif ($age > 60*2) {
1357                 $age_str = int $age/60;
1358                 $age_str .= " min ago";
1359         } elsif ($age > 2) {
1360                 $age_str = int $age;
1361                 $age_str .= " sec ago";
1362         } else {
1363                 $age_str .= " right now";
1364         }
1365         return $age_str;
1366 }
1367
1368 use constant {
1369         S_IFINVALID => 0030000,
1370         S_IFGITLINK => 0160000,
1371 };
1372
1373 # submodule/subproject, a commit object reference
1374 sub S_ISGITLINK {
1375         my $mode = shift;
1376
1377         return (($mode & S_IFMT) == S_IFGITLINK)
1378 }
1379
1380 # convert file mode in octal to symbolic file mode string
1381 sub mode_str {
1382         my $mode = oct shift;
1383
1384         if (S_ISGITLINK($mode)) {
1385                 return 'm---------';
1386         } elsif (S_ISDIR($mode & S_IFMT)) {
1387                 return 'drwxr-xr-x';
1388         } elsif (S_ISLNK($mode)) {
1389                 return 'lrwxrwxrwx';
1390         } elsif (S_ISREG($mode)) {
1391                 # git cares only about the executable bit
1392                 if ($mode & S_IXUSR) {
1393                         return '-rwxr-xr-x';
1394                 } else {
1395                         return '-rw-r--r--';
1396                 };
1397         } else {
1398                 return '----------';
1399         }
1400 }
1401
1402 # convert file mode in octal to file type string
1403 sub file_type {
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                 return "file";
1420         } else {
1421                 return "unknown";
1422         }
1423 }
1424
1425 # convert file mode in octal to file type description string
1426 sub file_type_long {
1427         my $mode = shift;
1428
1429         if ($mode !~ m/^[0-7]+$/) {
1430                 return $mode;
1431         } else {
1432                 $mode = oct $mode;
1433         }
1434
1435         if (S_ISGITLINK($mode)) {
1436                 return "submodule";
1437         } elsif (S_ISDIR($mode & S_IFMT)) {
1438                 return "directory";
1439         } elsif (S_ISLNK($mode)) {
1440                 return "symlink";
1441         } elsif (S_ISREG($mode)) {
1442                 if ($mode & S_IXUSR) {
1443                         return "executable";
1444                 } else {
1445                         return "file";
1446                 };
1447         } else {
1448                 return "unknown";
1449         }
1450 }
1451
1452
1453 ## ----------------------------------------------------------------------
1454 ## functions returning short HTML fragments, or transforming HTML fragments
1455 ## which don't belong to other sections
1456
1457 # format line of commit message.
1458 sub format_log_line_html {
1459         my $line = shift;
1460
1461         $line = esc_html($line, -nbsp=>1);
1462         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1463                 $cgi->a({-href => href(action=>"object", hash=>$1),
1464                                         -class => "text"}, $1);
1465         }eg;
1466
1467         return $line;
1468 }
1469
1470 # format marker of refs pointing to given object
1471
1472 # the destination action is chosen based on object type and current context:
1473 # - for annotated tags, we choose the tag view unless it's the current view
1474 #   already, in which case we go to shortlog view
1475 # - for other refs, we keep the current view if we're in history, shortlog or
1476 #   log view, and select shortlog otherwise
1477 sub format_ref_marker {
1478         my ($refs, $id) = @_;
1479         my $markers = '';
1480
1481         if (defined $refs->{$id}) {
1482                 foreach my $ref (@{$refs->{$id}}) {
1483                         # this code exploits the fact that non-lightweight tags are the
1484                         # only indirect objects, and that they are the only objects for which
1485                         # we want to use tag instead of shortlog as action
1486                         my ($type, $name) = qw();
1487                         my $indirect = ($ref =~ s/\^\{\}$//);
1488                         # e.g. tags/v2.6.11 or heads/next
1489                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1490                                 $type = $1;
1491                                 $name = $2;
1492                         } else {
1493                                 $type = "ref";
1494                                 $name = $ref;
1495                         }
1496
1497                         my $class = $type;
1498                         $class .= " indirect" if $indirect;
1499
1500                         my $dest_action = "shortlog";
1501
1502                         if ($indirect) {
1503                                 $dest_action = "tag" unless $action eq "tag";
1504                         } elsif ($action =~ /^(history|(short)?log)$/) {
1505                                 $dest_action = $action;
1506                         }
1507
1508                         my $dest = "";
1509                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1510                         $dest .= $ref;
1511
1512                         my $link = $cgi->a({
1513                                 -href => href(
1514                                         action=>$dest_action,
1515                                         hash=>$dest
1516                                 )}, $name);
1517
1518                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1519                                 $link . "</span>";
1520                 }
1521         }
1522
1523         if ($markers) {
1524                 return ' <span class="refs">'. $markers . '</span>';
1525         } else {
1526                 return "";
1527         }
1528 }
1529
1530 # format, perhaps shortened and with markers, title line
1531 sub format_subject_html {
1532         my ($long, $short, $href, $extra) = @_;
1533         $extra = '' unless defined($extra);
1534
1535         if (length($short) < length($long)) {
1536                 $long =~ s/[[:cntrl:]]/?/g;
1537                 return $cgi->a({-href => $href, -class => "list subject",
1538                                 -title => to_utf8($long)},
1539                        esc_html($short)) . $extra;
1540         } else {
1541                 return $cgi->a({-href => $href, -class => "list subject"},
1542                        esc_html($long)) . $extra;
1543         }
1544 }
1545
1546 # Rather than recomputing the url for an email multiple times, we cache it
1547 # after the first hit. This gives a visible benefit in views where the avatar
1548 # for the same email is used repeatedly (e.g. shortlog).
1549 # The cache is shared by all avatar engines (currently gravatar only), which
1550 # are free to use it as preferred. Since only one avatar engine is used for any
1551 # given page, there's no risk for cache conflicts.
1552 our %avatar_cache = ();
1553
1554 # Compute the picon url for a given email, by using the picon search service over at
1555 # http://www.cs.indiana.edu/picons/search.html
1556 sub picon_url {
1557         my $email = lc shift;
1558         if (!$avatar_cache{$email}) {
1559                 my ($user, $domain) = split('@', $email);
1560                 $avatar_cache{$email} =
1561                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1562                         "$domain/$user/" .
1563                         "users+domains+unknown/up/single";
1564         }
1565         return $avatar_cache{$email};
1566 }
1567
1568 # Compute the gravatar url for a given email, if it's not in the cache already.
1569 # Gravatar stores only the part of the URL before the size, since that's the
1570 # one computationally more expensive. This also allows reuse of the cache for
1571 # different sizes (for this particular engine).
1572 sub gravatar_url {
1573         my $email = lc shift;
1574         my $size = shift;
1575         $avatar_cache{$email} ||=
1576                 "http://www.gravatar.com/avatar/" .
1577                         Digest::MD5::md5_hex($email) . "?s=";
1578         return $avatar_cache{$email} . $size;
1579 }
1580
1581 # Insert an avatar for the given $email at the given $size if the feature
1582 # is enabled.
1583 sub git_get_avatar {
1584         my ($email, %opts) = @_;
1585         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1586         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1587         $opts{-size} ||= 'default';
1588         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1589         my $url = "";
1590         if ($git_avatar eq 'gravatar') {
1591                 $url = gravatar_url($email, $size);
1592         } elsif ($git_avatar eq 'picon') {
1593                 $url = picon_url($email);
1594         }
1595         # Other providers can be added by extending the if chain, defining $url
1596         # as needed. If no variant puts something in $url, we assume avatars
1597         # are completely disabled/unavailable.
1598         if ($url) {
1599                 return $pre_white .
1600                        "<img width=\"$size\" " .
1601                             "class=\"avatar\" " .
1602                             "src=\"$url\" " .
1603                             "alt=\"\" " .
1604                        "/>" . $post_white;
1605         } else {
1606                 return "";
1607         }
1608 }
1609
1610 sub format_search_author {
1611         my ($author, $searchtype, $displaytext) = @_;
1612         my $have_search = gitweb_check_feature('search');
1613
1614         if ($have_search) {
1615                 my $performed = "";
1616                 if ($searchtype eq 'author') {
1617                         $performed = "authored";
1618                 } elsif ($searchtype eq 'committer') {
1619                         $performed = "committed";
1620                 }
1621
1622                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1623                                 searchtext=>$author,
1624                                 searchtype=>$searchtype), class=>"list",
1625                                 title=>"Search for commits $performed by $author"},
1626                                 $displaytext);
1627
1628         } else {
1629                 return $displaytext;
1630         }
1631 }
1632
1633 # format the author name of the given commit with the given tag
1634 # the author name is chopped and escaped according to the other
1635 # optional parameters (see chop_str).
1636 sub format_author_html {
1637         my $tag = shift;
1638         my $co = shift;
1639         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1640         return "<$tag class=\"author\">" .
1641                format_search_author($co->{'author_name'}, "author",
1642                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1643                        $author) .
1644                "</$tag>";
1645 }
1646
1647 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1648 sub format_git_diff_header_line {
1649         my $line = shift;
1650         my $diffinfo = shift;
1651         my ($from, $to) = @_;
1652
1653         if ($diffinfo->{'nparents'}) {
1654                 # combined diff
1655                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1656                 if ($to->{'href'}) {
1657                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1658                                          esc_path($to->{'file'}));
1659                 } else { # file was deleted (no href)
1660                         $line .= esc_path($to->{'file'});
1661                 }
1662         } else {
1663                 # "ordinary" diff
1664                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1665                 if ($from->{'href'}) {
1666                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1667                                          'a/' . esc_path($from->{'file'}));
1668                 } else { # file was added (no href)
1669                         $line .= 'a/' . esc_path($from->{'file'});
1670                 }
1671                 $line .= ' ';
1672                 if ($to->{'href'}) {
1673                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1674                                          'b/' . esc_path($to->{'file'}));
1675                 } else { # file was deleted
1676                         $line .= 'b/' . esc_path($to->{'file'});
1677                 }
1678         }
1679
1680         return "<div class=\"diff header\">$line</div>\n";
1681 }
1682
1683 # format extended diff header line, before patch itself
1684 sub format_extended_diff_header_line {
1685         my $line = shift;
1686         my $diffinfo = shift;
1687         my ($from, $to) = @_;
1688
1689         # match <path>
1690         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1691                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1692                                        esc_path($from->{'file'}));
1693         }
1694         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1695                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1696                                  esc_path($to->{'file'}));
1697         }
1698         # match single <mode>
1699         if ($line =~ m/\s(\d{6})$/) {
1700                 $line .= '<span class="info"> (' .
1701                          file_type_long($1) .
1702                          ')</span>';
1703         }
1704         # match <hash>
1705         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1706                 # can match only for combined diff
1707                 $line = 'index ';
1708                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1709                         if ($from->{'href'}[$i]) {
1710                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1711                                                   -class=>"hash"},
1712                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1713                         } else {
1714                                 $line .= '0' x 7;
1715                         }
1716                         # separator
1717                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1718                 }
1719                 $line .= '..';
1720                 if ($to->{'href'}) {
1721                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1722                                          substr($diffinfo->{'to_id'},0,7));
1723                 } else {
1724                         $line .= '0' x 7;
1725                 }
1726
1727         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1728                 # can match only for ordinary diff
1729                 my ($from_link, $to_link);
1730                 if ($from->{'href'}) {
1731                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1732                                              substr($diffinfo->{'from_id'},0,7));
1733                 } else {
1734                         $from_link = '0' x 7;
1735                 }
1736                 if ($to->{'href'}) {
1737                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1738                                            substr($diffinfo->{'to_id'},0,7));
1739                 } else {
1740                         $to_link = '0' x 7;
1741                 }
1742                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1743                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1744         }
1745
1746         return $line . "<br/>\n";
1747 }
1748
1749 # format from-file/to-file diff header
1750 sub format_diff_from_to_header {
1751         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1752         my $line;
1753         my $result = '';
1754
1755         $line = $from_line;
1756         #assert($line =~ m/^---/) if DEBUG;
1757         # no extra formatting for "^--- /dev/null"
1758         if (! $diffinfo->{'nparents'}) {
1759                 # ordinary (single parent) diff
1760                 if ($line =~ m!^--- "?a/!) {
1761                         if ($from->{'href'}) {
1762                                 $line = '--- a/' .
1763                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1764                                                 esc_path($from->{'file'}));
1765                         } else {
1766                                 $line = '--- a/' .
1767                                         esc_path($from->{'file'});
1768                         }
1769                 }
1770                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1771
1772         } else {
1773                 # combined diff (merge commit)
1774                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1775                         if ($from->{'href'}[$i]) {
1776                                 $line = '--- ' .
1777                                         $cgi->a({-href=>href(action=>"blobdiff",
1778                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1779                                                              hash_parent_base=>$parents[$i],
1780                                                              file_parent=>$from->{'file'}[$i],
1781                                                              hash=>$diffinfo->{'to_id'},
1782                                                              hash_base=>$hash,
1783                                                              file_name=>$to->{'file'}),
1784                                                  -class=>"path",
1785                                                  -title=>"diff" . ($i+1)},
1786                                                 $i+1) .
1787                                         '/' .
1788                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1789                                                 esc_path($from->{'file'}[$i]));
1790                         } else {
1791                                 $line = '--- /dev/null';
1792                         }
1793                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1794                 }
1795         }
1796
1797         $line = $to_line;
1798         #assert($line =~ m/^\+\+\+/) if DEBUG;
1799         # no extra formatting for "^+++ /dev/null"
1800         if ($line =~ m!^\+\+\+ "?b/!) {
1801                 if ($to->{'href'}) {
1802                         $line = '+++ b/' .
1803                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1804                                         esc_path($to->{'file'}));
1805                 } else {
1806                         $line = '+++ b/' .
1807                                 esc_path($to->{'file'});
1808                 }
1809         }
1810         $result .= qq!<div class="diff to_file">$line</div>\n!;
1811
1812         return $result;
1813 }
1814
1815 # create note for patch simplified by combined diff
1816 sub format_diff_cc_simplified {
1817         my ($diffinfo, @parents) = @_;
1818         my $result = '';
1819
1820         $result .= "<div class=\"diff header\">" .
1821                    "diff --cc ";
1822         if (!is_deleted($diffinfo)) {
1823                 $result .= $cgi->a({-href => href(action=>"blob",
1824                                                   hash_base=>$hash,
1825                                                   hash=>$diffinfo->{'to_id'},
1826                                                   file_name=>$diffinfo->{'to_file'}),
1827                                     -class => "path"},
1828                                    esc_path($diffinfo->{'to_file'}));
1829         } else {
1830                 $result .= esc_path($diffinfo->{'to_file'});
1831         }
1832         $result .= "</div>\n" . # class="diff header"
1833                    "<div class=\"diff nodifferences\">" .
1834                    "Simple merge" .
1835                    "</div>\n"; # class="diff nodifferences"
1836
1837         return $result;
1838 }
1839
1840 # format patch (diff) line (not to be used for diff headers)
1841 sub format_diff_line {
1842         my $line = shift;
1843         my ($from, $to) = @_;
1844         my $diff_class = "";
1845
1846         chomp $line;
1847
1848         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1849                 # combined diff
1850                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1851                 if ($line =~ m/^\@{3}/) {
1852                         $diff_class = " chunk_header";
1853                 } elsif ($line =~ m/^\\/) {
1854                         $diff_class = " incomplete";
1855                 } elsif ($prefix =~ tr/+/+/) {
1856                         $diff_class = " add";
1857                 } elsif ($prefix =~ tr/-/-/) {
1858                         $diff_class = " rem";
1859                 }
1860         } else {
1861                 # assume ordinary diff
1862                 my $char = substr($line, 0, 1);
1863                 if ($char eq '+') {
1864                         $diff_class = " add";
1865                 } elsif ($char eq '-') {
1866                         $diff_class = " rem";
1867                 } elsif ($char eq '@') {
1868                         $diff_class = " chunk_header";
1869                 } elsif ($char eq "\\") {
1870                         $diff_class = " incomplete";
1871                 }
1872         }
1873         $line = untabify($line);
1874         if ($from && $to && $line =~ m/^\@{2} /) {
1875                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1876                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1877
1878                 $from_lines = 0 unless defined $from_lines;
1879                 $to_lines   = 0 unless defined $to_lines;
1880
1881                 if ($from->{'href'}) {
1882                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1883                                              -class=>"list"}, $from_text);
1884                 }
1885                 if ($to->{'href'}) {
1886                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1887                                              -class=>"list"}, $to_text);
1888                 }
1889                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1890                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1891                 return "<div class=\"diff$diff_class\">$line</div>\n";
1892         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1893                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1894                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1895
1896                 @from_text = split(' ', $ranges);
1897                 for (my $i = 0; $i < @from_text; ++$i) {
1898                         ($from_start[$i], $from_nlines[$i]) =
1899                                 (split(',', substr($from_text[$i], 1)), 0);
1900                 }
1901
1902                 $to_text   = pop @from_text;
1903                 $to_start  = pop @from_start;
1904                 $to_nlines = pop @from_nlines;
1905
1906                 $line = "<span class=\"chunk_info\">$prefix ";
1907                 for (my $i = 0; $i < @from_text; ++$i) {
1908                         if ($from->{'href'}[$i]) {
1909                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1910                                                   -class=>"list"}, $from_text[$i]);
1911                         } else {
1912                                 $line .= $from_text[$i];
1913                         }
1914                         $line .= " ";
1915                 }
1916                 if ($to->{'href'}) {
1917                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1918                                           -class=>"list"}, $to_text);
1919                 } else {
1920                         $line .= $to_text;
1921                 }
1922                 $line .= " $prefix</span>" .
1923                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1924                 return "<div class=\"diff$diff_class\">$line</div>\n";
1925         }
1926         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1927 }
1928
1929 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1930 # linked.  Pass the hash of the tree/commit to snapshot.
1931 sub format_snapshot_links {
1932         my ($hash) = @_;
1933         my $num_fmts = @snapshot_fmts;
1934         if ($num_fmts > 1) {
1935                 # A parenthesized list of links bearing format names.
1936                 # e.g. "snapshot (_tar.gz_ _zip_)"
1937                 return "snapshot (" . join(' ', map
1938                         $cgi->a({
1939                                 -href => href(
1940                                         action=>"snapshot",
1941                                         hash=>$hash,
1942                                         snapshot_format=>$_
1943                                 )
1944                         }, $known_snapshot_formats{$_}{'display'})
1945                 , @snapshot_fmts) . ")";
1946         } elsif ($num_fmts == 1) {
1947                 # A single "snapshot" link whose tooltip bears the format name.
1948                 # i.e. "_snapshot_"
1949                 my ($fmt) = @snapshot_fmts;
1950                 return
1951                         $cgi->a({
1952                                 -href => href(
1953                                         action=>"snapshot",
1954                                         hash=>$hash,
1955                                         snapshot_format=>$fmt
1956                                 ),
1957                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1958                         }, "snapshot");
1959         } else { # $num_fmts == 0
1960                 return undef;
1961         }
1962 }
1963
1964 ## ......................................................................
1965 ## functions returning values to be passed, perhaps after some
1966 ## transformation, to other functions; e.g. returning arguments to href()
1967
1968 # returns hash to be passed to href to generate gitweb URL
1969 # in -title key it returns description of link
1970 sub get_feed_info {
1971         my $format = shift || 'Atom';
1972         my %res = (action => lc($format));
1973
1974         # feed links are possible only for project views
1975         return unless (defined $project);
1976         # some views should link to OPML, or to generic project feed,
1977         # or don't have specific feed yet (so they should use generic)
1978         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1979
1980         my $branch;
1981         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1982         # from tag links; this also makes possible to detect branch links
1983         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1984             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1985                 $branch = $1;
1986         }
1987         # find log type for feed description (title)
1988         my $type = 'log';
1989         if (defined $file_name) {
1990                 $type  = "history of $file_name";
1991                 $type .= "/" if ($action eq 'tree');
1992                 $type .= " on '$branch'" if (defined $branch);
1993         } else {
1994                 $type = "log of $branch" if (defined $branch);
1995         }
1996
1997         $res{-title} = $type;
1998         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1999         $res{'file_name'} = $file_name;
2000
2001         return %res;
2002 }
2003
2004 ## ----------------------------------------------------------------------
2005 ## git utility subroutines, invoking git commands
2006
2007 # returns path to the core git executable and the --git-dir parameter as list
2008 sub git_cmd {
2009         return $GIT, '--git-dir='.$git_dir;
2010 }
2011
2012 # quote the given arguments for passing them to the shell
2013 # quote_command("command", "arg 1", "arg with ' and ! characters")
2014 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2015 # Try to avoid using this function wherever possible.
2016 sub quote_command {
2017         return join(' ',
2018                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2019 }
2020
2021 # get HEAD ref of given project as hash
2022 sub git_get_head_hash {
2023         my $project = shift;
2024         my $o_git_dir = $git_dir;
2025         my $retval = undef;
2026         $git_dir = "$projectroot/$project";
2027         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2028                 my $head = <$fd>;
2029                 close $fd;
2030                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2031                         $retval = $1;
2032                 }
2033         }
2034         if (defined $o_git_dir) {
2035                 $git_dir = $o_git_dir;
2036         }
2037         return $retval;
2038 }
2039
2040 # get type of given object
2041 sub git_get_type {
2042         my $hash = shift;
2043
2044         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2045         my $type = <$fd>;
2046         close $fd or return;
2047         chomp $type;
2048         return $type;
2049 }
2050
2051 # repository configuration
2052 our $config_file = '';
2053 our %config;
2054
2055 # store multiple values for single key as anonymous array reference
2056 # single values stored directly in the hash, not as [ <value> ]
2057 sub hash_set_multi {
2058         my ($hash, $key, $value) = @_;
2059
2060         if (!exists $hash->{$key}) {
2061                 $hash->{$key} = $value;
2062         } elsif (!ref $hash->{$key}) {
2063                 $hash->{$key} = [ $hash->{$key}, $value ];
2064         } else {
2065                 push @{$hash->{$key}}, $value;
2066         }
2067 }
2068
2069 # return hash of git project configuration
2070 # optionally limited to some section, e.g. 'gitweb'
2071 sub git_parse_project_config {
2072         my $section_regexp = shift;
2073         my %config;
2074
2075         local $/ = "\0";
2076
2077         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2078                 or return;
2079
2080         while (my $keyval = <$fh>) {
2081                 chomp $keyval;
2082                 my ($key, $value) = split(/\n/, $keyval, 2);
2083
2084                 hash_set_multi(\%config, $key, $value)
2085                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2086         }
2087         close $fh;
2088
2089         return %config;
2090 }
2091
2092 # convert config value to boolean: 'true' or 'false'
2093 # no value, number > 0, 'true' and 'yes' values are true
2094 # rest of values are treated as false (never as error)
2095 sub config_to_bool {
2096         my $val = shift;
2097
2098         return 1 if !defined $val;             # section.key
2099
2100         # strip leading and trailing whitespace
2101         $val =~ s/^\s+//;
2102         $val =~ s/\s+$//;
2103
2104         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2105                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2106 }
2107
2108 # convert config value to simple decimal number
2109 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2110 # to be multiplied by 1024, 1048576, or 1073741824
2111 sub config_to_int {
2112         my $val = shift;
2113
2114         # strip leading and trailing whitespace
2115         $val =~ s/^\s+//;
2116         $val =~ s/\s+$//;
2117
2118         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2119                 $unit = lc($unit);
2120                 # unknown unit is treated as 1
2121                 return $num * ($unit eq 'g' ? 1073741824 :
2122                                $unit eq 'm' ?    1048576 :
2123                                $unit eq 'k' ?       1024 : 1);
2124         }
2125         return $val;
2126 }
2127
2128 # convert config value to array reference, if needed
2129 sub config_to_multi {
2130         my $val = shift;
2131
2132         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2133 }
2134
2135 sub git_get_project_config {
2136         my ($key, $type) = @_;
2137
2138         # key sanity check
2139         return unless ($key);
2140         $key =~ s/^gitweb\.//;
2141         return if ($key =~ m/\W/);
2142
2143         # type sanity check
2144         if (defined $type) {
2145                 $type =~ s/^--//;
2146                 $type = undef
2147                         unless ($type eq 'bool' || $type eq 'int');
2148         }
2149
2150         # get config
2151         if (!defined $config_file ||
2152             $config_file ne "$git_dir/config") {
2153                 %config = git_parse_project_config('gitweb');
2154                 $config_file = "$git_dir/config";
2155         }
2156
2157         # check if config variable (key) exists
2158         return unless exists $config{"gitweb.$key"};
2159
2160         # ensure given type
2161         if (!defined $type) {
2162                 return $config{"gitweb.$key"};
2163         } elsif ($type eq 'bool') {
2164                 # backward compatibility: 'git config --bool' returns true/false
2165                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2166         } elsif ($type eq 'int') {
2167                 return config_to_int($config{"gitweb.$key"});
2168         }
2169         return $config{"gitweb.$key"};
2170 }
2171
2172 # get hash of given path at given ref
2173 sub git_get_hash_by_path {
2174         my $base = shift;
2175         my $path = shift || return undef;
2176         my $type = shift;
2177
2178         $path =~ s,/+$,,;
2179
2180         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2181                 or die_error(500, "Open git-ls-tree failed");
2182         my $line = <$fd>;
2183         close $fd or return undef;
2184
2185         if (!defined $line) {
2186                 # there is no tree or hash given by $path at $base
2187                 return undef;
2188         }
2189
2190         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2191         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2192         if (defined $type && $type ne $2) {
2193                 # type doesn't match
2194                 return undef;
2195         }
2196         return $3;
2197 }
2198
2199 # get path of entry with given hash at given tree-ish (ref)
2200 # used to get 'from' filename for combined diff (merge commit) for renames
2201 sub git_get_path_by_hash {
2202         my $base = shift || return;
2203         my $hash = shift || return;
2204
2205         local $/ = "\0";
2206
2207         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2208                 or return undef;
2209         while (my $line = <$fd>) {
2210                 chomp $line;
2211
2212                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2213                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2214                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2215                         close $fd;
2216                         return $1;
2217                 }
2218         }
2219         close $fd;
2220         return undef;
2221 }
2222
2223 ## ......................................................................
2224 ## git utility functions, directly accessing git repository
2225
2226 sub git_get_project_description {
2227         my $path = shift;
2228
2229         $git_dir = "$projectroot/$path";
2230         open my $fd, '<', "$git_dir/description"
2231                 or return git_get_project_config('description');
2232         my $descr = <$fd>;
2233         close $fd;
2234         if (defined $descr) {
2235                 chomp $descr;
2236         }
2237         return $descr;
2238 }
2239
2240 sub git_get_project_ctags {
2241         my $path = shift;
2242         my $ctags = {};
2243
2244         $git_dir = "$projectroot/$path";
2245         opendir my $dh, "$git_dir/ctags"
2246                 or return $ctags;
2247         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2248                 open my $ct, '<', $_ or next;
2249                 my $val = <$ct>;
2250                 chomp $val;
2251                 close $ct;
2252                 my $ctag = $_; $ctag =~ s#.*/##;
2253                 $ctags->{$ctag} = $val;
2254         }
2255         closedir $dh;
2256         $ctags;
2257 }
2258
2259 sub git_populate_project_tagcloud {
2260         my $ctags = shift;
2261
2262         # First, merge different-cased tags; tags vote on casing
2263         my %ctags_lc;
2264         foreach (keys %$ctags) {
2265                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2266                 if (not $ctags_lc{lc $_}->{topcount}
2267                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2268                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2269                         $ctags_lc{lc $_}->{topname} = $_;
2270                 }
2271         }
2272
2273         my $cloud;
2274         if (eval { require HTML::TagCloud; 1; }) {
2275                 $cloud = HTML::TagCloud->new;
2276                 foreach (sort keys %ctags_lc) {
2277                         # Pad the title with spaces so that the cloud looks
2278                         # less crammed.
2279                         my $title = $ctags_lc{$_}->{topname};
2280                         $title =~ s/ /&nbsp;/g;
2281                         $title =~ s/^/&nbsp;/g;
2282                         $title =~ s/$/&nbsp;/g;
2283                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2284                 }
2285         } else {
2286                 $cloud = \%ctags_lc;
2287         }
2288         $cloud;
2289 }
2290
2291 sub git_show_project_tagcloud {
2292         my ($cloud, $count) = @_;
2293         print STDERR ref($cloud)."..\n";
2294         if (ref $cloud eq 'HTML::TagCloud') {
2295                 return $cloud->html_and_css($count);
2296         } else {
2297                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2298                 return '<p align="center">' . join (', ', map {
2299                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2300                 } splice(@tags, 0, $count)) . '</p>';
2301         }
2302 }
2303
2304 sub git_get_project_url_list {
2305         my $path = shift;
2306
2307         $git_dir = "$projectroot/$path";
2308         open my $fd, '<', "$git_dir/cloneurl"
2309                 or return wantarray ?
2310                 @{ config_to_multi(git_get_project_config('url')) } :
2311                    config_to_multi(git_get_project_config('url'));
2312         my @git_project_url_list = map { chomp; $_ } <$fd>;
2313         close $fd;
2314
2315         return wantarray ? @git_project_url_list : \@git_project_url_list;
2316 }
2317
2318 sub git_get_projects_list {
2319         my ($filter) = @_;
2320         my @list;
2321
2322         $filter ||= '';
2323         $filter =~ s/\.git$//;
2324
2325         my $check_forks = gitweb_check_feature('forks');
2326
2327         if (-d $projects_list) {
2328                 # search in directory
2329                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2330                 # remove the trailing "/"
2331                 $dir =~ s!/+$!!;
2332                 my $pfxlen = length("$dir");
2333                 my $pfxdepth = ($dir =~ tr!/!!);
2334
2335                 File::Find::find({
2336                         follow_fast => 1, # follow symbolic links
2337                         follow_skip => 2, # ignore duplicates
2338                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2339                         wanted => sub {
2340                                 # skip project-list toplevel, if we get it.
2341                                 return if (m!^[/.]$!);
2342                                 # only directories can be git repositories
2343                                 return unless (-d $_);
2344                                 # don't traverse too deep (Find is super slow on os x)
2345                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2346                                         $File::Find::prune = 1;
2347                                         return;
2348                                 }
2349
2350                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2351                                 # we check related file in $projectroot
2352                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2353                                 if (check_export_ok("$projectroot/$path")) {
2354                                         push @list, { path => $path };
2355                                         $File::Find::prune = 1;
2356                                 }
2357                         },
2358                 }, "$dir");
2359
2360         } elsif (-f $projects_list) {
2361                 # read from file(url-encoded):
2362                 # 'git%2Fgit.git Linus+Torvalds'
2363                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2364                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2365                 my %paths;
2366                 open my $fd, '<', $projects_list or return;
2367         PROJECT:
2368                 while (my $line = <$fd>) {
2369                         chomp $line;
2370                         my ($path, $owner) = split ' ', $line;
2371                         $path = unescape($path);
2372                         $owner = unescape($owner);
2373                         if (!defined $path) {
2374                                 next;
2375                         }
2376                         if ($filter ne '') {
2377                                 # looking for forks;
2378                                 my $pfx = substr($path, 0, length($filter));
2379                                 if ($pfx ne $filter) {
2380                                         next PROJECT;
2381                                 }
2382                                 my $sfx = substr($path, length($filter));
2383                                 if ($sfx !~ /^\/.*\.git$/) {
2384                                         next PROJECT;
2385                                 }
2386                         } elsif ($check_forks) {
2387                         PATH:
2388                                 foreach my $filter (keys %paths) {
2389                                         # looking for forks;
2390                                         my $pfx = substr($path, 0, length($filter));
2391                                         if ($pfx ne $filter) {
2392                                                 next PATH;
2393                                         }
2394                                         my $sfx = substr($path, length($filter));
2395                                         if ($sfx !~ /^\/.*\.git$/) {
2396                                                 next PATH;
2397                                         }
2398                                         # is a fork, don't include it in
2399                                         # the list
2400                                         next PROJECT;
2401                                 }
2402                         }
2403                         if (check_export_ok("$projectroot/$path")) {
2404                                 my $pr = {
2405                                         path => $path,
2406                                         owner => to_utf8($owner),
2407                                 };
2408                                 push @list, $pr;
2409                                 (my $forks_path = $path) =~ s/\.git$//;
2410                                 $paths{$forks_path}++;
2411                         }
2412                 }
2413                 close $fd;
2414         }
2415         return @list;
2416 }
2417
2418 our $gitweb_project_owner = undef;
2419 sub git_get_project_list_from_file {
2420
2421         return if (defined $gitweb_project_owner);
2422
2423         $gitweb_project_owner = {};
2424         # read from file (url-encoded):
2425         # 'git%2Fgit.git Linus+Torvalds'
2426         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2427         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2428         if (-f $projects_list) {
2429                 open(my $fd, '<', $projects_list);
2430                 while (my $line = <$fd>) {
2431                         chomp $line;
2432                         my ($pr, $ow) = split ' ', $line;
2433                         $pr = unescape($pr);
2434                         $ow = unescape($ow);
2435                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2436                 }
2437                 close $fd;
2438         }
2439 }
2440
2441 sub git_get_project_owner {
2442         my $project = shift;
2443         my $owner;
2444
2445         return undef unless $project;
2446         $git_dir = "$projectroot/$project";
2447
2448         if (!defined $gitweb_project_owner) {
2449                 git_get_project_list_from_file();
2450         }
2451
2452         if (exists $gitweb_project_owner->{$project}) {
2453                 $owner = $gitweb_project_owner->{$project};
2454         }
2455         if (!defined $owner){
2456                 $owner = git_get_project_config('owner');
2457         }
2458         if (!defined $owner) {
2459                 $owner = get_file_owner("$git_dir");
2460         }
2461
2462         return $owner;
2463 }
2464
2465 sub git_get_last_activity {
2466         my ($path) = @_;
2467         my $fd;
2468
2469         $git_dir = "$projectroot/$path";
2470         open($fd, "-|", git_cmd(), 'for-each-ref',
2471              '--format=%(committer)',
2472              '--sort=-committerdate',
2473              '--count=1',
2474              'refs/heads') or return;
2475         my $most_recent = <$fd>;
2476         close $fd or return;
2477         if (defined $most_recent &&
2478             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2479                 my $timestamp = $1;
2480                 my $age = time - $timestamp;
2481                 return ($age, age_string($age));
2482         }
2483         return (undef, undef);
2484 }
2485
2486 sub git_get_references {
2487         my $type = shift || "";
2488         my %refs;
2489         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2490         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2491         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2492                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2493                 or return;
2494
2495         while (my $line = <$fd>) {
2496                 chomp $line;
2497                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2498                         if (defined $refs{$1}) {
2499                                 push @{$refs{$1}}, $2;
2500                         } else {
2501                                 $refs{$1} = [ $2 ];
2502                         }
2503                 }
2504         }
2505         close $fd or return;
2506         return \%refs;
2507 }
2508
2509 sub git_get_rev_name_tags {
2510         my $hash = shift || return undef;
2511
2512         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2513                 or return;
2514         my $name_rev = <$fd>;
2515         close $fd;
2516
2517         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2518                 return $1;
2519         } else {
2520                 # catches also '$hash undefined' output
2521                 return undef;
2522         }
2523 }
2524
2525 ## ----------------------------------------------------------------------
2526 ## parse to hash functions
2527
2528 sub parse_date {
2529         my $epoch = shift;
2530         my $tz = shift || "-0000";
2531
2532         my %date;
2533         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2534         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2535         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2536         $date{'hour'} = $hour;
2537         $date{'minute'} = $min;
2538         $date{'mday'} = $mday;
2539         $date{'day'} = $days[$wday];
2540         $date{'month'} = $months[$mon];
2541         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2542                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2543         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2544                              $mday, $months[$mon], $hour ,$min;
2545         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2546                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2547
2548         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2549         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2550         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2551         $date{'hour_local'} = $hour;
2552         $date{'minute_local'} = $min;
2553         $date{'tz_local'} = $tz;
2554         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2555                                   1900+$year, $mon+1, $mday,
2556                                   $hour, $min, $sec, $tz);
2557         return %date;
2558 }
2559
2560 sub parse_tag {
2561         my $tag_id = shift;
2562         my %tag;
2563         my @comment;
2564
2565         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2566         $tag{'id'} = $tag_id;
2567         while (my $line = <$fd>) {
2568                 chomp $line;
2569                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2570                         $tag{'object'} = $1;
2571                 } elsif ($line =~ m/^type (.+)$/) {
2572                         $tag{'type'} = $1;
2573                 } elsif ($line =~ m/^tag (.+)$/) {
2574                         $tag{'name'} = $1;
2575                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2576                         $tag{'author'} = $1;
2577                         $tag{'author_epoch'} = $2;
2578                         $tag{'author_tz'} = $3;
2579                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2580                                 $tag{'author_name'}  = $1;
2581                                 $tag{'author_email'} = $2;
2582                         } else {
2583                                 $tag{'author_name'} = $tag{'author'};
2584                         }
2585                 } elsif ($line =~ m/--BEGIN/) {
2586                         push @comment, $line;
2587                         last;
2588                 } elsif ($line eq "") {
2589                         last;
2590                 }
2591         }
2592         push @comment, <$fd>;
2593         $tag{'comment'} = \@comment;
2594         close $fd or return;
2595         if (!defined $tag{'name'}) {
2596                 return
2597         };
2598         return %tag
2599 }
2600
2601 sub parse_commit_text {
2602         my ($commit_text, $withparents) = @_;
2603         my @commit_lines = split '\n', $commit_text;
2604         my %co;
2605
2606         pop @commit_lines; # Remove '\0'
2607
2608         if (! @commit_lines) {
2609                 return;
2610         }
2611
2612         my $header = shift @commit_lines;
2613         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2614                 return;
2615         }
2616         ($co{'id'}, my @parents) = split ' ', $header;
2617         while (my $line = shift @commit_lines) {
2618                 last if $line eq "\n";
2619                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2620                         $co{'tree'} = $1;
2621                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2622                         push @parents, $1;
2623                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2624                         $co{'author'} = to_utf8($1);
2625                         $co{'author_epoch'} = $2;
2626                         $co{'author_tz'} = $3;
2627                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2628                                 $co{'author_name'}  = $1;
2629                                 $co{'author_email'} = $2;
2630                         } else {
2631                                 $co{'author_name'} = $co{'author'};
2632                         }
2633                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2634                         $co{'committer'} = to_utf8($1);
2635                         $co{'committer_epoch'} = $2;
2636                         $co{'committer_tz'} = $3;
2637                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2638                                 $co{'committer_name'}  = $1;
2639                                 $co{'committer_email'} = $2;
2640                         } else {
2641                                 $co{'committer_name'} = $co{'committer'};
2642                         }
2643                 }
2644         }
2645         if (!defined $co{'tree'}) {
2646                 return;
2647         };
2648         $co{'parents'} = \@parents;
2649         $co{'parent'} = $parents[0];
2650
2651         foreach my $title (@commit_lines) {
2652                 $title =~ s/^    //;
2653                 if ($title ne "") {
2654                         $co{'title'} = chop_str($title, 80, 5);
2655                         # remove leading stuff of merges to make the interesting part visible
2656                         if (length($title) > 50) {
2657                                 $title =~ s/^Automatic //;
2658                                 $title =~ s/^merge (of|with) /Merge ... /i;
2659                                 if (length($title) > 50) {
2660                                         $title =~ s/(http|rsync):\/\///;
2661                                 }
2662                                 if (length($title) > 50) {
2663                                         $title =~ s/(master|www|rsync)\.//;
2664                                 }
2665                                 if (length($title) > 50) {
2666                                         $title =~ s/kernel.org:?//;
2667                                 }
2668                                 if (length($title) > 50) {
2669                                         $title =~ s/\/pub\/scm//;
2670                                 }
2671                         }
2672                         $co{'title_short'} = chop_str($title, 50, 5);
2673                         last;
2674                 }
2675         }
2676         if (! defined $co{'title'} || $co{'title'} eq "") {
2677                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2678         }
2679         # remove added spaces
2680         foreach my $line (@commit_lines) {
2681                 $line =~ s/^    //;
2682         }
2683         $co{'comment'} = \@commit_lines;
2684
2685         my $age = time - $co{'committer_epoch'};
2686         $co{'age'} = $age;
2687         $co{'age_string'} = age_string($age);
2688         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2689         if ($age > 60*60*24*7*2) {
2690                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2691                 $co{'age_string_age'} = $co{'age_string'};
2692         } else {
2693                 $co{'age_string_date'} = $co{'age_string'};
2694                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2695         }
2696         return %co;
2697 }
2698
2699 sub parse_commit {
2700         my ($commit_id) = @_;
2701         my %co;
2702
2703         local $/ = "\0";
2704
2705         open my $fd, "-|", git_cmd(), "rev-list",
2706                 "--parents",
2707                 "--header",
2708                 "--max-count=1",
2709                 $commit_id,
2710                 "--",
2711                 or die_error(500, "Open git-rev-list failed");
2712         %co = parse_commit_text(<$fd>, 1);
2713         close $fd;
2714
2715         return %co;
2716 }
2717
2718 sub parse_commits {
2719         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2720         my @cos;
2721
2722         $maxcount ||= 1;
2723         $skip ||= 0;
2724
2725         local $/ = "\0";
2726
2727         open my $fd, "-|", git_cmd(), "rev-list",
2728                 "--header",
2729                 @args,
2730                 ("--max-count=" . $maxcount),
2731                 ("--skip=" . $skip),
2732                 @extra_options,
2733                 $commit_id,
2734                 "--",
2735                 ($filename ? ($filename) : ())
2736                 or die_error(500, "Open git-rev-list failed");
2737         while (my $line = <$fd>) {
2738                 my %co = parse_commit_text($line);
2739                 push @cos, \%co;
2740         }
2741         close $fd;
2742
2743         return wantarray ? @cos : \@cos;
2744 }
2745
2746 # parse line of git-diff-tree "raw" output
2747 sub parse_difftree_raw_line {
2748         my $line = shift;
2749         my %res;
2750
2751         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2752         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2753         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2754                 $res{'from_mode'} = $1;
2755                 $res{'to_mode'} = $2;
2756                 $res{'from_id'} = $3;
2757                 $res{'to_id'} = $4;
2758                 $res{'status'} = $5;
2759                 $res{'similarity'} = $6;
2760                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2761                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2762                 } else {
2763                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2764                 }
2765         }
2766         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2767         # combined diff (for merge commit)
2768         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2769                 $res{'nparents'}  = length($1);
2770                 $res{'from_mode'} = [ split(' ', $2) ];
2771                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2772                 $res{'from_id'} = [ split(' ', $3) ];
2773                 $res{'to_id'} = pop @{$res{'from_id'}};
2774                 $res{'status'} = [ split('', $4) ];
2775                 $res{'to_file'} = unquote($5);
2776         }
2777         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2778         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2779                 $res{'commit'} = $1;
2780         }
2781
2782         return wantarray ? %res : \%res;
2783 }
2784
2785 # wrapper: return parsed line of git-diff-tree "raw" output
2786 # (the argument might be raw line, or parsed info)
2787 sub parsed_difftree_line {
2788         my $line_or_ref = shift;
2789
2790         if (ref($line_or_ref) eq "HASH") {
2791                 # pre-parsed (or generated by hand)
2792                 return $line_or_ref;
2793         } else {
2794                 return parse_difftree_raw_line($line_or_ref);
2795         }
2796 }
2797
2798 # parse line of git-ls-tree output
2799 sub parse_ls_tree_line {
2800         my $line = shift;
2801         my %opts = @_;
2802         my %res;
2803
2804         if ($opts{'-l'}) {
2805                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2806                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2807
2808                 $res{'mode'} = $1;
2809                 $res{'type'} = $2;
2810                 $res{'hash'} = $3;
2811                 $res{'size'} = $4;
2812                 if ($opts{'-z'}) {
2813                         $res{'name'} = $5;
2814                 } else {
2815                         $res{'name'} = unquote($5);
2816                 }
2817         } else {
2818                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2819                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2820
2821                 $res{'mode'} = $1;
2822                 $res{'type'} = $2;
2823                 $res{'hash'} = $3;
2824                 if ($opts{'-z'}) {
2825                         $res{'name'} = $4;
2826                 } else {
2827                         $res{'name'} = unquote($4);
2828                 }
2829         }
2830
2831         return wantarray ? %res : \%res;
2832 }
2833
2834 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2835 sub parse_from_to_diffinfo {
2836         my ($diffinfo, $from, $to, @parents) = @_;
2837
2838         if ($diffinfo->{'nparents'}) {
2839                 # combined diff
2840                 $from->{'file'} = [];
2841                 $from->{'href'} = [];
2842                 fill_from_file_info($diffinfo, @parents)
2843                         unless exists $diffinfo->{'from_file'};
2844                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2845                         $from->{'file'}[$i] =
2846                                 defined $diffinfo->{'from_file'}[$i] ?
2847                                         $diffinfo->{'from_file'}[$i] :
2848                                         $diffinfo->{'to_file'};
2849                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2850                                 $from->{'href'}[$i] = href(action=>"blob",
2851                                                            hash_base=>$parents[$i],
2852                                                            hash=>$diffinfo->{'from_id'}[$i],
2853                                                            file_name=>$from->{'file'}[$i]);
2854                         } else {
2855                                 $from->{'href'}[$i] = undef;
2856                         }
2857                 }
2858         } else {
2859                 # ordinary (not combined) diff
2860                 $from->{'file'} = $diffinfo->{'from_file'};
2861                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2862                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2863                                                hash=>$diffinfo->{'from_id'},
2864                                                file_name=>$from->{'file'});
2865                 } else {
2866                         delete $from->{'href'};
2867                 }
2868         }
2869
2870         $to->{'file'} = $diffinfo->{'to_file'};
2871         if (!is_deleted($diffinfo)) { # file exists in result
2872                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2873                                      hash=>$diffinfo->{'to_id'},
2874                                      file_name=>$to->{'file'});
2875         } else {
2876                 delete $to->{'href'};
2877         }
2878 }
2879
2880 ## ......................................................................
2881 ## parse to array of hashes functions
2882
2883 sub git_get_heads_list {
2884         my $limit = shift;
2885         my @headslist;
2886
2887         open my $fd, '-|', git_cmd(), 'for-each-ref',
2888                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2889                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2890                 'refs/heads'
2891                 or return;
2892         while (my $line = <$fd>) {
2893                 my %ref_item;
2894
2895                 chomp $line;
2896                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2897                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2898                 my ($committer, $epoch, $tz) =
2899                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2900                 $ref_item{'fullname'}  = $name;
2901                 $name =~ s!^refs/heads/!!;
2902
2903                 $ref_item{'name'}  = $name;
2904                 $ref_item{'id'}    = $hash;
2905                 $ref_item{'title'} = $title || '(no commit message)';
2906                 $ref_item{'epoch'} = $epoch;
2907                 if ($epoch) {
2908                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2909                 } else {
2910                         $ref_item{'age'} = "unknown";
2911                 }
2912
2913                 push @headslist, \%ref_item;
2914         }
2915         close $fd;
2916
2917         return wantarray ? @headslist : \@headslist;
2918 }
2919
2920 sub git_get_tags_list {
2921         my $limit = shift;
2922         my @tagslist;
2923
2924         open my $fd, '-|', git_cmd(), 'for-each-ref',
2925                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2926                 '--format=%(objectname) %(objecttype) %(refname) '.
2927                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2928                 'refs/tags'
2929                 or return;
2930         while (my $line = <$fd>) {
2931                 my %ref_item;
2932
2933                 chomp $line;
2934                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2935                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2936                 my ($creator, $epoch, $tz) =
2937                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2938                 $ref_item{'fullname'} = $name;
2939                 $name =~ s!^refs/tags/!!;
2940
2941                 $ref_item{'type'} = $type;
2942                 $ref_item{'id'} = $id;
2943                 $ref_item{'name'} = $name;
2944                 if ($type eq "tag") {
2945                         $ref_item{'subject'} = $title;
2946                         $ref_item{'reftype'} = $reftype;
2947                         $ref_item{'refid'}   = $refid;
2948                 } else {
2949                         $ref_item{'reftype'} = $type;
2950                         $ref_item{'refid'}   = $id;
2951                 }
2952
2953                 if ($type eq "tag" || $type eq "commit") {
2954                         $ref_item{'epoch'} = $epoch;
2955                         if ($epoch) {
2956                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2957                         } else {
2958                                 $ref_item{'age'} = "unknown";
2959                         }
2960                 }
2961
2962                 push @tagslist, \%ref_item;
2963         }
2964         close $fd;
2965
2966         return wantarray ? @tagslist : \@tagslist;
2967 }
2968
2969 ## ----------------------------------------------------------------------
2970 ## filesystem-related functions
2971
2972 sub get_file_owner {
2973         my $path = shift;
2974
2975         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2976         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2977         if (!defined $gcos) {
2978                 return undef;
2979         }
2980         my $owner = $gcos;
2981         $owner =~ s/[,;].*$//;
2982         return to_utf8($owner);
2983 }
2984
2985 # assume that file exists
2986 sub insert_file {
2987         my $filename = shift;
2988
2989         open my $fd, '<', $filename;
2990         print map { to_utf8($_) } <$fd>;
2991         close $fd;
2992 }
2993
2994 ## ......................................................................
2995 ## mimetype related functions
2996
2997 sub mimetype_guess_file {
2998         my $filename = shift;
2999         my $mimemap = shift;
3000         -r $mimemap or return undef;
3001
3002         my %mimemap;
3003         open(my $mh, '<', $mimemap) or return undef;
3004         while (<$mh>) {
3005                 next if m/^#/; # skip comments
3006                 my ($mimetype, $exts) = split(/\t+/);
3007                 if (defined $exts) {
3008                         my @exts = split(/\s+/, $exts);
3009                         foreach my $ext (@exts) {
3010                                 $mimemap{$ext} = $mimetype;
3011                         }
3012                 }
3013         }
3014         close($mh);
3015
3016         $filename =~ /\.([^.]*)$/;
3017         return $mimemap{$1};
3018 }
3019
3020 sub mimetype_guess {
3021         my $filename = shift;
3022         my $mime;
3023         $filename =~ /\./ or return undef;
3024
3025         if ($mimetypes_file) {
3026                 my $file = $mimetypes_file;
3027                 if ($file !~ m!^/!) { # if it is relative path
3028                         # it is relative to project
3029                         $file = "$projectroot/$project/$file";
3030                 }
3031                 $mime = mimetype_guess_file($filename, $file);
3032         }
3033         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3034         return $mime;
3035 }
3036
3037 sub blob_mimetype {
3038         my $fd = shift;
3039         my $filename = shift;
3040
3041         if ($filename) {
3042                 my $mime = mimetype_guess($filename);
3043                 $mime and return $mime;
3044         }
3045
3046         # just in case
3047         return $default_blob_plain_mimetype unless $fd;
3048
3049         if (-T $fd) {
3050                 return 'text/plain';
3051         } elsif (! $filename) {
3052                 return 'application/octet-stream';
3053         } elsif ($filename =~ m/\.png$/i) {
3054                 return 'image/png';
3055         } elsif ($filename =~ m/\.gif$/i) {
3056                 return 'image/gif';
3057         } elsif ($filename =~ m/\.jpe?g$/i) {
3058                 return 'image/jpeg';
3059         } else {
3060                 return 'application/octet-stream';
3061         }
3062 }
3063
3064 sub blob_contenttype {
3065         my ($fd, $file_name, $type) = @_;
3066
3067         $type ||= blob_mimetype($fd, $file_name);
3068         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3069                 $type .= "; charset=$default_text_plain_charset";
3070         }
3071
3072         return $type;
3073 }
3074
3075 ## ======================================================================
3076 ## functions printing HTML: header, footer, error page
3077
3078 sub git_header_html {
3079         my $status = shift || "200 OK";
3080         my $expires = shift;
3081
3082         my $title = "$site_name";
3083         if (defined $project) {
3084                 $title .= " - " . to_utf8($project);
3085                 if (defined $action) {
3086                         $title .= "/$action";
3087                         if (defined $file_name) {
3088                                 $title .= " - " . esc_path($file_name);
3089                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3090                                         $title .= "/";
3091                                 }
3092                         }
3093                 }
3094         }
3095         my $content_type;
3096         # require explicit support from the UA if we are to send the page as
3097         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3098         # we have to do this because MSIE sometimes globs '*/*', pretending to
3099         # support xhtml+xml but choking when it gets what it asked for.
3100         if (defined $cgi->http('HTTP_ACCEPT') &&
3101             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3102             $cgi->Accept('application/xhtml+xml') != 0) {
3103                 $content_type = 'application/xhtml+xml';
3104         } else {
3105                 $content_type = 'text/html';
3106         }
3107         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3108                            -status=> $status, -expires => $expires);
3109         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3110         print <<EOF;
3111 <?xml version="1.0" encoding="utf-8"?>
3112 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3113 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3114 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3115 <!-- git core binaries version $git_version -->
3116 <head>
3117 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3118 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3119 <meta name="robots" content="index, nofollow"/>
3120 <title>$title</title>
3121 EOF
3122         # the stylesheet, favicon etc urls won't work correctly with path_info
3123         # unless we set the appropriate base URL
3124         if ($ENV{'PATH_INFO'}) {
3125                 print "<base href=\"".esc_url($base_url)."\" />\n";
3126         }
3127         # print out each stylesheet that exist, providing backwards capability
3128         # for those people who defined $stylesheet in a config file
3129         if (defined $stylesheet) {
3130                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3131         } else {
3132                 foreach my $stylesheet (@stylesheets) {
3133                         next unless $stylesheet;
3134                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3135                 }
3136         }
3137         if (defined $project) {
3138                 my %href_params = get_feed_info();
3139                 if (!exists $href_params{'-title'}) {
3140                         $href_params{'-title'} = 'log';
3141                 }
3142
3143                 foreach my $format qw(RSS Atom) {
3144                         my $type = lc($format);
3145                         my %link_attr = (
3146                                 '-rel' => 'alternate',
3147                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3148                                 '-type' => "application/$type+xml"
3149                         );
3150
3151                         $href_params{'action'} = $type;
3152                         $link_attr{'-href'} = href(%href_params);
3153                         print "<link ".
3154                               "rel=\"$link_attr{'-rel'}\" ".
3155                               "title=\"$link_attr{'-title'}\" ".
3156                               "href=\"$link_attr{'-href'}\" ".
3157                               "type=\"$link_attr{'-type'}\" ".
3158                               "/>\n";
3159
3160                         $href_params{'extra_options'} = '--no-merges';
3161                         $link_attr{'-href'} = href(%href_params);
3162                         $link_attr{'-title'} .= ' (no merges)';
3163                         print "<link ".
3164                               "rel=\"$link_attr{'-rel'}\" ".
3165                               "title=\"$link_attr{'-title'}\" ".
3166                               "href=\"$link_attr{'-href'}\" ".
3167                               "type=\"$link_attr{'-type'}\" ".
3168                               "/>\n";
3169                 }
3170
3171         } else {
3172                 printf('<link rel="alternate" title="%s projects list" '.
3173                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3174                        $site_name, href(project=>undef, action=>"project_index"));
3175                 printf('<link rel="alternate" title="%s projects feeds" '.
3176                        'href="%s" type="text/x-opml" />'."\n",
3177                        $site_name, href(project=>undef, action=>"opml"));
3178         }
3179         if (defined $favicon) {
3180                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3181         }
3182
3183         print "</head>\n" .
3184               "<body>\n";
3185
3186         if (-f $site_header) {
3187                 insert_file($site_header);
3188         }
3189
3190         print "<div class=\"page_header\">\n" .
3191               $cgi->a({-href => esc_url($logo_url),
3192                        -title => $logo_label},
3193                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3194         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3195         if (defined $project) {
3196                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3197                 if (defined $action) {
3198                         print " / $action";
3199                 }
3200                 print "\n";
3201         }
3202         print "</div>\n";
3203
3204         my $have_search = gitweb_check_feature('search');
3205         if (defined $project && $have_search) {
3206                 if (!defined $searchtext) {
3207                         $searchtext = "";
3208                 }
3209                 my $search_hash;
3210                 if (defined $hash_base) {
3211                         $search_hash = $hash_base;
3212                 } elsif (defined $hash) {
3213                         $search_hash = $hash;
3214                 } else {
3215                         $search_hash = "HEAD";
3216                 }
3217                 my $action = $my_uri;
3218                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3219                 if ($use_pathinfo) {
3220                         $action .= "/".esc_url($project);
3221                 }
3222                 print $cgi->startform(-method => "get", -action => $action) .
3223                       "<div class=\"search\">\n" .
3224                       (!$use_pathinfo &&
3225                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3226                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3227                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3228                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3229                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3230                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3231                       " search:\n",
3232                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3233                       "<span title=\"Extended regular expression\">" .
3234                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3235                                      -checked => $search_use_regexp) .
3236                       "</span>" .
3237                       "</div>" .
3238                       $cgi->end_form() . "\n";
3239         }
3240 }
3241
3242 sub git_footer_html {
3243         my $feed_class = 'rss_logo';
3244
3245         print "<div class=\"page_footer\">\n";
3246         if (defined $project) {
3247                 my $descr = git_get_project_description($project);
3248                 if (defined $descr) {
3249                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3250                 }
3251
3252                 my %href_params = get_feed_info();
3253                 if (!%href_params) {
3254                         $feed_class .= ' generic';
3255                 }
3256                 $href_params{'-title'} ||= 'log';
3257
3258                 foreach my $format qw(RSS Atom) {
3259                         $href_params{'action'} = lc($format);
3260                         print $cgi->a({-href => href(%href_params),
3261                                       -title => "$href_params{'-title'} $format feed",
3262                                       -class => $feed_class}, $format)."\n";
3263                 }
3264
3265         } else {
3266                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3267                               -class => $feed_class}, "OPML") . " ";
3268                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3269                               -class => $feed_class}, "TXT") . "\n";
3270         }
3271         print "</div>\n"; # class="page_footer"
3272
3273         if (-f $site_footer) {
3274                 insert_file($site_footer);
3275         }
3276
3277         print "</body>\n" .
3278               "</html>";
3279 }
3280
3281 # die_error(<http_status_code>, <error_message>)
3282 # Example: die_error(404, 'Hash not found')
3283 # By convention, use the following status codes (as defined in RFC 2616):
3284 # 400: Invalid or missing CGI parameters, or
3285 #      requested object exists but has wrong type.
3286 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3287 #      this server or project.
3288 # 404: Requested object/revision/project doesn't exist.
3289 # 500: The server isn't configured properly, or
3290 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3291 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3292 sub die_error {
3293         my $status = shift || 500;
3294         my $error = shift || "Internal server error";
3295
3296         my %http_responses = (400 => '400 Bad Request',
3297                               403 => '403 Forbidden',
3298                               404 => '404 Not Found',
3299                               500 => '500 Internal Server Error');
3300         git_header_html($http_responses{$status});
3301         print <<EOF;
3302 <div class="page_body">
3303 <br /><br />
3304 $status - $error
3305 <br />
3306 </div>
3307 EOF
3308         git_footer_html();
3309         exit;
3310 }
3311
3312 ## ----------------------------------------------------------------------
3313 ## functions printing or outputting HTML: navigation
3314
3315 sub git_print_page_nav {
3316         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3317         $extra = '' if !defined $extra; # pager or formats
3318
3319         my @navs = qw(summary log commit commitdiff tree);
3320         if ($suppress) {
3321                 @navs = grep { $_ ne $suppress } @navs;
3322         }
3323
3324         my %arg = map { $_ => {action=>$_} } @navs;
3325         if (defined $head) {
3326                 for (qw(commit commitdiff)) {
3327                         $arg{$_}{'hash'} = $head;
3328                 }
3329                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3330                         $arg{'log'}{'hash'} = $head;
3331                 }
3332         }
3333
3334         $arg{'log'}{'action'} = 'shortlog';
3335         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3336         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3337
3338         my @actions = gitweb_get_feature('actions');
3339         my %repl = (
3340                 '%' => '%',
3341                 'n' => $project,         # project name
3342                 'f' => $git_dir,         # project path within filesystem
3343                 'h' => $treehead || '',  # current hash ('h' parameter)
3344                 'b' => $treebase || '',  # hash base ('hb' parameter)
3345         );
3346         while (@actions) {
3347                 my ($label, $link, $pos) = splice(@actions,0,3);
3348                 # insert
3349                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3350                 # munch munch
3351                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3352                 $arg{$label}{'_href'} = $link;
3353         }
3354
3355         print "<div class=\"page_nav\">\n" .
3356                 (join " | ",
3357                  map { $_ eq $current ?
3358                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3359                  } @navs);
3360         print "<br/>\n$extra<br/>\n" .
3361               "</div>\n";
3362 }
3363
3364 sub format_paging_nav {
3365         my ($action, $hash, $head, $page, $has_next_link) = @_;
3366         my $paging_nav;
3367
3368
3369         if ($hash ne $head || $page) {
3370                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3371         } else {
3372                 $paging_nav .= "HEAD";
3373         }
3374
3375         if ($page > 0) {
3376                 $paging_nav .= " &sdot; " .
3377                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3378                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3379         } else {
3380                 $paging_nav .= " &sdot; prev";
3381         }
3382
3383         if ($has_next_link) {
3384                 $paging_nav .= " &sdot; " .
3385                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3386                                  -accesskey => "n", -title => "Alt-n"}, "next");
3387         } else {
3388                 $paging_nav .= " &sdot; next";
3389         }
3390
3391         return $paging_nav;
3392 }
3393
3394 sub format_log_nav {
3395         my ($action, $hash, $head, $page, $has_next_link) = @_;
3396         my $paging_nav;
3397
3398         if ($action eq 'shortlog') {
3399                 $paging_nav .= 'shortlog';
3400         } else {
3401                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
3402         }
3403         $paging_nav .= ' | ';
3404         if ($action eq 'log') {
3405                 $paging_nav .= 'fulllog';
3406         } else {
3407                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
3408         }
3409
3410         $paging_nav .= " | " . format_paging_nav($action, $hash, $head, $page, $has_next_link);
3411         return $paging_nav;
3412 }
3413
3414 ## ......................................................................
3415 ## functions printing or outputting HTML: div
3416
3417 sub git_print_header_div {
3418         my ($action, $title, $hash, $hash_base) = @_;
3419         my %args = ();
3420
3421         $args{'action'} = $action;
3422         $args{'hash'} = $hash if $hash;
3423         $args{'hash_base'} = $hash_base if $hash_base;
3424
3425         print "<div class=\"header\">\n" .
3426               $cgi->a({-href => href(%args), -class => "title"},
3427               $title ? $title : $action) .
3428               "\n</div>\n";
3429 }
3430
3431 sub print_local_time {
3432         my %date = @_;
3433         if ($date{'hour_local'} < 6) {
3434                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3435                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3436         } else {
3437                 printf(" (%02d:%02d %s)",
3438                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3439         }
3440 }
3441
3442 # Outputs the author name and date in long form
3443 sub git_print_authorship {
3444         my $co = shift;
3445         my %opts = @_;
3446         my $tag = $opts{-tag} || 'div';
3447         my $author = $co->{'author_name'};
3448
3449         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3450         print "<$tag class=\"author_date\">" .
3451               format_search_author($author, "author", esc_html($author)) .
3452               " [$ad{'rfc2822'}";
3453         print_local_time(%ad) if ($opts{-localtime});
3454         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3455                   . "</$tag>\n";
3456 }
3457
3458 # Outputs table rows containing the full author or committer information,
3459 # in the format expected for 'commit' view (& similia).
3460 # Parameters are a commit hash reference, followed by the list of people
3461 # to output information for. If the list is empty it defalts to both
3462 # author and committer.
3463 sub git_print_authorship_rows {
3464         my $co = shift;
3465         # too bad we can't use @people = @_ || ('author', 'committer')
3466         my @people = @_;
3467         @people = ('author', 'committer') unless @people;
3468         foreach my $who (@people) {
3469                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3470                 print "<tr><td>$who</td><td>" .
3471                       format_search_author($co->{"${who}_name"}, $who,
3472                                esc_html($co->{"${who}_name"})) . " " .
3473                       format_search_author($co->{"${who}_email"}, $who,
3474                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3475                       "</td><td rowspan=\"2\">" .
3476                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3477                       "</td></tr>\n" .
3478                       "<tr>" .
3479                       "<td></td><td> $wd{'rfc2822'}";
3480                 print_local_time(%wd);
3481                 print "</td>" .
3482                       "</tr>\n";
3483         }
3484 }
3485
3486 sub git_print_page_path {
3487         my $name = shift;
3488         my $type = shift;
3489         my $hb = shift;
3490
3491
3492         print "<div class=\"page_path\">";
3493         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3494                       -title => 'tree root'}, to_utf8("[$project]"));
3495         print " / ";
3496         if (defined $name) {
3497                 my @dirname = split '/', $name;
3498                 my $basename = pop @dirname;
3499                 my $fullname = '';
3500
3501                 foreach my $dir (@dirname) {
3502                         $fullname .= ($fullname ? '/' : '') . $dir;
3503                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3504                                                      hash_base=>$hb),
3505                                       -title => $fullname}, esc_path($dir));
3506                         print " / ";
3507                 }
3508                 if (defined $type && $type eq 'blob') {
3509                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3510                                                      hash_base=>$hb),
3511                                       -title => $name}, esc_path($basename));
3512                 } elsif (defined $type && $type eq 'tree') {
3513                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3514                                                      hash_base=>$hb),
3515                                       -title => $name}, esc_path($basename));
3516                         print " / ";
3517                 } else {
3518                         print esc_path($basename);
3519                 }
3520         }
3521         print "<br/></div>\n";
3522 }
3523
3524 sub git_print_log {
3525         my $log = shift;
3526         my %opts = @_;
3527
3528         if ($opts{'-remove_title'}) {
3529                 # remove title, i.e. first line of log
3530                 shift @$log;
3531         }
3532         # remove leading empty lines
3533         while (defined $log->[0] && $log->[0] eq "") {
3534                 shift @$log;
3535         }
3536
3537         # print log
3538         my $signoff = 0;
3539         my $empty = 0;
3540         foreach my $line (@$log) {
3541                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3542                         $signoff = 1;
3543                         $empty = 0;
3544                         if (! $opts{'-remove_signoff'}) {
3545                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3546                                 next;
3547                         } else {
3548                                 # remove signoff lines
3549                                 next;
3550                         }
3551                 } else {
3552                         $signoff = 0;
3553                 }
3554
3555                 # print only one empty line
3556                 # do not print empty line after signoff
3557                 if ($line eq "") {
3558                         next if ($empty || $signoff);
3559                         $empty = 1;
3560                 } else {
3561                         $empty = 0;
3562                 }
3563
3564                 print format_log_line_html($line) . "<br/>\n";
3565         }
3566
3567         if ($opts{'-final_empty_line'}) {
3568                 # end with single empty line
3569                 print "<br/>\n" unless $empty;
3570         }
3571 }
3572
3573 # return link target (what link points to)
3574 sub git_get_link_target {
3575         my $hash = shift;
3576         my $link_target;
3577
3578         # read link
3579         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3580                 or return;
3581         {
3582                 local $/ = undef;
3583                 $link_target = <$fd>;
3584         }
3585         close $fd
3586                 or return;
3587
3588         return $link_target;
3589 }
3590
3591 # given link target, and the directory (basedir) the link is in,
3592 # return target of link relative to top directory (top tree);
3593 # return undef if it is not possible (including absolute links).
3594 sub normalize_link_target {
3595         my ($link_target, $basedir) = @_;
3596
3597         # absolute symlinks (beginning with '/') cannot be normalized
3598         return if (substr($link_target, 0, 1) eq '/');
3599
3600         # normalize link target to path from top (root) tree (dir)
3601         my $path;
3602         if ($basedir) {
3603                 $path = $basedir . '/' . $link_target;
3604         } else {
3605                 # we are in top (root) tree (dir)
3606                 $path = $link_target;
3607         }
3608
3609         # remove //, /./, and /../
3610         my @path_parts;
3611         foreach my $part (split('/', $path)) {
3612                 # discard '.' and ''
3613                 next if (!$part || $part eq '.');
3614                 # handle '..'
3615                 if ($part eq '..') {
3616                         if (@path_parts) {
3617                                 pop @path_parts;
3618                         } else {
3619                                 # link leads outside repository (outside top dir)
3620                                 return;
3621                         }
3622                 } else {
3623                         push @path_parts, $part;
3624                 }
3625         }
3626         $path = join('/', @path_parts);
3627
3628         return $path;
3629 }
3630
3631 # print tree entry (row of git_tree), but without encompassing <tr> element
3632 sub git_print_tree_entry {
3633         my ($t, $basedir, $hash_base, $have_blame) = @_;
3634
3635         my %base_key = ();
3636         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3637
3638         # The format of a table row is: mode list link.  Where mode is
3639         # the mode of the entry, list is the name of the entry, an href,
3640         # and link is the action links of the entry.
3641
3642         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3643         if (exists $t->{'size'}) {
3644                 print "<td class=\"size\">$t->{'size'}</td>\n";
3645         }
3646         if ($t->{'type'} eq "blob") {
3647                 print "<td class=\"list\">" .
3648                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3649                                                file_name=>"$basedir$t->{'name'}", %base_key),
3650                                 -class => "list"}, esc_path($t->{'name'}));
3651                 if (S_ISLNK(oct $t->{'mode'})) {
3652                         my $link_target = git_get_link_target($t->{'hash'});
3653                         if ($link_target) {
3654                                 my $norm_target = normalize_link_target($link_target, $basedir);
3655                                 if (defined $norm_target) {
3656                                         print " -> " .
3657                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3658                                                                      file_name=>$norm_target),
3659                                                        -title => $norm_target}, esc_path($link_target));
3660                                 } else {
3661                                         print " -> " . esc_path($link_target);
3662                                 }
3663                         }
3664                 }
3665                 print "</td>\n";
3666                 print "<td class=\"link\">";
3667                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3668                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3669                               "blob");
3670                 if ($have_blame) {
3671                         print " | " .
3672                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3673                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3674                                       "blame");
3675                 }
3676                 if (defined $hash_base) {
3677                         print " | " .
3678                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3679                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3680                                       "history");
3681                 }
3682                 print " | " .
3683                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3684                                                file_name=>"$basedir$t->{'name'}")},
3685                                 "raw");
3686                 print "</td>\n";
3687
3688         } elsif ($t->{'type'} eq "tree") {
3689                 print "<td class=\"list\">";
3690                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3691                                              file_name=>"$basedir$t->{'name'}",
3692                                              %base_key)},
3693                               esc_path($t->{'name'}));
3694                 print "</td>\n";
3695                 print "<td class=\"link\">";
3696                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3697                                              file_name=>"$basedir$t->{'name'}",
3698                                              %base_key)},
3699                               "tree");
3700                 if (defined $hash_base) {
3701                         print " | " .
3702                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3703                                                      file_name=>"$basedir$t->{'name'}")},
3704                                       "history");
3705                 }
3706                 print "</td>\n";
3707         } else {
3708                 # unknown object: we can only present history for it
3709                 # (this includes 'commit' object, i.e. submodule support)
3710                 print "<td class=\"list\">" .
3711                       esc_path($t->{'name'}) .
3712                       "</td>\n";
3713                 print "<td class=\"link\">";
3714                 if (defined $hash_base) {
3715                         print $cgi->a({-href => href(action=>"history",
3716                                                      hash_base=>$hash_base,
3717                                                      file_name=>"$basedir$t->{'name'}")},
3718                                       "history");
3719                 }
3720                 print "</td>\n";
3721         }
3722 }
3723
3724 ## ......................................................................
3725 ## functions printing large fragments of HTML
3726
3727 # get pre-image filenames for merge (combined) diff
3728 sub fill_from_file_info {
3729         my ($diff, @parents) = @_;
3730
3731         $diff->{'from_file'} = [ ];
3732         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3733         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3734                 if ($diff->{'status'}[$i] eq 'R' ||
3735                     $diff->{'status'}[$i] eq 'C') {
3736                         $diff->{'from_file'}[$i] =
3737                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3738                 }
3739         }
3740
3741         return $diff;
3742 }
3743
3744 # is current raw difftree line of file deletion
3745 sub is_deleted {
3746         my $diffinfo = shift;
3747
3748         return $diffinfo->{'to_id'} eq ('0' x 40);
3749 }
3750
3751 # does patch correspond to [previous] difftree raw line
3752 # $diffinfo  - hashref of parsed raw diff format
3753 # $patchinfo - hashref of parsed patch diff format
3754 #              (the same keys as in $diffinfo)
3755 sub is_patch_split {
3756         my ($diffinfo, $patchinfo) = @_;
3757
3758         return defined $diffinfo && defined $patchinfo
3759                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3760 }
3761
3762
3763 sub git_difftree_body {
3764         my ($difftree, $hash, @parents) = @_;
3765         my ($parent) = $parents[0];
3766         my $have_blame = gitweb_check_feature('blame');
3767         print "<div class=\"list_head\">\n";
3768         if ($#{$difftree} > 10) {
3769                 print(($#{$difftree} + 1) . " files changed:\n");
3770         }
3771         print "</div>\n";
3772
3773         print "<table class=\"" .
3774               (@parents > 1 ? "combined " : "") .
3775               "diff_tree\">\n";
3776
3777         # header only for combined diff in 'commitdiff' view
3778         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3779         if ($has_header) {
3780                 # table header
3781                 print "<thead><tr>\n" .
3782                        "<th></th><th></th>\n"; # filename, patchN link
3783                 for (my $i = 0; $i < @parents; $i++) {
3784                         my $par = $parents[$i];
3785                         print "<th>" .
3786                               $cgi->a({-href => href(action=>"commitdiff",
3787                                                      hash=>$hash, hash_parent=>$par),
3788                                        -title => 'commitdiff to parent number ' .
3789                                                   ($i+1) . ': ' . substr($par,0,7)},
3790                                       $i+1) .
3791                               "&nbsp;</th>\n";
3792                 }
3793                 print "</tr></thead>\n<tbody>\n";
3794         }
3795
3796         my $alternate = 1;
3797         my $patchno = 0;
3798         foreach my $line (@{$difftree}) {
3799                 my $diff = parsed_difftree_line($line);
3800
3801                 if ($alternate) {
3802                         print "<tr class=\"dark\">\n";
3803                 } else {
3804                         print "<tr class=\"light\">\n";
3805                 }
3806                 $alternate ^= 1;
3807
3808                 if (exists $diff->{'nparents'}) { # combined diff
3809
3810                         fill_from_file_info($diff, @parents)
3811                                 unless exists $diff->{'from_file'};
3812
3813                         if (!is_deleted($diff)) {
3814                                 # file exists in the result (child) commit
3815                                 print "<td>" .
3816                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3817                                                              file_name=>$diff->{'to_file'},
3818                                                              hash_base=>$hash),
3819                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3820                                       "</td>\n";
3821                         } else {
3822                                 print "<td>" .
3823                                       esc_path($diff->{'to_file'}) .
3824                                       "</td>\n";
3825                         }
3826
3827                         if ($action eq 'commitdiff') {
3828                                 # link to patch
3829                                 $patchno++;
3830                                 print "<td class=\"link\">" .
3831                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3832                                       " | " .
3833                                       "</td>\n";
3834                         }
3835
3836                         my $has_history = 0;
3837                         my $not_deleted = 0;
3838                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3839                                 my $hash_parent = $parents[$i];
3840                                 my $from_hash = $diff->{'from_id'}[$i];
3841                                 my $from_path = $diff->{'from_file'}[$i];
3842                                 my $status = $diff->{'status'}[$i];
3843
3844                                 $has_history ||= ($status ne 'A');
3845                                 $not_deleted ||= ($status ne 'D');
3846
3847                                 if ($status eq 'A') {
3848                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3849                                 } elsif ($status eq 'D') {
3850                                         print "<td class=\"link\">" .
3851                                               $cgi->a({-href => href(action=>"blob",
3852                                                                      hash_base=>$hash,
3853                                                                      hash=>$from_hash,
3854                                                                      file_name=>$from_path)},
3855                                                       "blob" . ($i+1)) .
3856                                               " | </td>\n";
3857                                 } else {
3858                                         if ($diff->{'to_id'} eq $from_hash) {
3859                                                 print "<td class=\"link nochange\">";
3860                                         } else {
3861                                                 print "<td class=\"link\">";
3862                                         }
3863                                         print $cgi->a({-href => href(action=>"blobdiff",
3864                                                                      hash=>$diff->{'to_id'},
3865                                                                      hash_parent=>$from_hash,
3866                                                                      hash_base=>$hash,
3867                                                                      hash_parent_base=>$hash_parent,
3868                                                                      file_name=>$diff->{'to_file'},
3869                                                                      file_parent=>$from_path)},
3870                                                       "diff" . ($i+1)) .
3871                                               " | </td>\n";
3872                                 }
3873                         }
3874
3875                         print "<td class=\"link\">";
3876                         if ($not_deleted) {
3877                                 print $cgi->a({-href => href(action=>"blob",
3878                                                              hash=>$diff->{'to_id'},
3879                                                              file_name=>$diff->{'to_file'},
3880                                                              hash_base=>$hash)},
3881                                               "blob");
3882                                 print " | " if ($has_history);
3883                         }
3884                         if ($has_history) {
3885                                 print $cgi->a({-href => href(action=>"history",
3886                                                              file_name=>$diff->{'to_file'},
3887                                                              hash_base=>$hash)},
3888                                               "history");
3889                         }
3890                         print "</td>\n";
3891
3892                         print "</tr>\n";
3893                         next; # instead of 'else' clause, to avoid extra indent
3894                 }
3895                 # else ordinary diff
3896
3897                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3898                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3899                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3900                         $to_mode_oct = oct $diff->{'to_mode'};
3901                         if (S_ISREG($to_mode_oct)) { # only for regular file
3902                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3903                         }
3904                         $to_file_type = file_type($diff->{'to_mode'});
3905                 }
3906                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3907                         $from_mode_oct = oct $diff->{'from_mode'};
3908                         if (S_ISREG($to_mode_oct)) { # only for regular file
3909                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3910                         }
3911                         $from_file_type = file_type($diff->{'from_mode'});
3912                 }
3913
3914                 if ($diff->{'status'} eq "A") { # created
3915                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3916                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3917                         $mode_chng   .= "]</span>";
3918                         print "<td>";
3919                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3920                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3921                                       -class => "list"}, esc_path($diff->{'file'}));
3922                         print "</td>\n";
3923                         print "<td>$mode_chng</td>\n";
3924                         print "<td class=\"link\">";
3925                         if ($action eq 'commitdiff') {
3926                                 # link to patch
3927                                 $patchno++;
3928                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3929                                 print " | ";
3930                         }
3931                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3932                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3933                                       "blob");
3934                         print "</td>\n";
3935
3936                 } elsif ($diff->{'status'} eq "D") { # deleted
3937                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3938                         print "<td>";
3939                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3940                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3941                                        -class => "list"}, esc_path($diff->{'file'}));
3942                         print "</td>\n";
3943                         print "<td>$mode_chng</td>\n";
3944                         print "<td class=\"link\">";
3945                         if ($action eq 'commitdiff') {
3946                                 # link to patch
3947                                 $patchno++;
3948                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3949                                 print " | ";
3950                         }
3951                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3952                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3953                                       "blob") . " | ";
3954                         if ($have_blame) {
3955                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3956                                                              file_name=>$diff->{'file'})},
3957                                               "blame") . " | ";
3958                         }
3959                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3960                                                      file_name=>$diff->{'file'})},
3961                                       "history");
3962                         print "</td>\n";
3963
3964                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3965                         my $mode_chnge = "";
3966                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3967                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3968                                 if ($from_file_type ne $to_file_type) {
3969                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3970                                 }
3971                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3972                                         if ($from_mode_str && $to_mode_str) {
3973                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3974                                         } elsif ($to_mode_str) {
3975                                                 $mode_chnge .= " mode: $to_mode_str";
3976                                         }
3977                                 }
3978                                 $mode_chnge .= "]</span>\n";
3979                         }
3980                         print "<td>";
3981                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3982                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3983                                       -class => "list"}, esc_path($diff->{'file'}));
3984                         print "</td>\n";
3985                         print "<td>$mode_chnge</td>\n";
3986                         print "<td class=\"link\">";
3987                         if ($action eq 'commitdiff') {
3988                                 # link to patch
3989                                 $patchno++;
3990                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3991                                       " | ";
3992                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3993                                 # "commit" view and modified file (not onlu mode changed)
3994                                 print $cgi->a({-href => href(action=>"blobdiff",
3995                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3996                                                              hash_base=>$hash, hash_parent_base=>$parent,
3997                                                              file_name=>$diff->{'file'})},
3998                                               "diff") .
3999                                       " | ";
4000                         }
4001                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4002                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4003                                        "blob") . " | ";
4004                         if ($have_blame) {
4005                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4006                                                              file_name=>$diff->{'file'})},
4007                                               "blame") . " | ";
4008                         }
4009                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4010                                                      file_name=>$diff->{'file'})},
4011                                       "history");
4012                         print "</td>\n";
4013
4014                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4015                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4016                         my $nstatus = $status_name{$diff->{'status'}};
4017                         my $mode_chng = "";
4018                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4019                                 # mode also for directories, so we cannot use $to_mode_str
4020                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4021                         }
4022                         print "<td>" .
4023                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4024                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4025                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4026                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4027                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4028                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4029                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4030                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4031                               "<td class=\"link\">";
4032                         if ($action eq 'commitdiff') {
4033                                 # link to patch
4034                                 $patchno++;
4035                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4036                                       " | ";
4037                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4038                                 # "commit" view and modified file (not only pure rename or copy)
4039                                 print $cgi->a({-href => href(action=>"blobdiff",
4040                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4041                                                              hash_base=>$hash, hash_parent_base=>$parent,
4042                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4043                                               "diff") .
4044                                       " | ";
4045                         }
4046                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4047                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4048                                       "blob") . " | ";
4049                         if ($have_blame) {
4050                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4051                                                              file_name=>$diff->{'to_file'})},
4052                                               "blame") . " | ";
4053                         }
4054                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4055                                                     file_name=>$diff->{'to_file'})},
4056                                       "history");
4057                         print "</td>\n";
4058
4059                 } # we should not encounter Unmerged (U) or Unknown (X) status
4060                 print "</tr>\n";
4061         }
4062         print "</tbody>" if $has_header;
4063         print "</table>\n";
4064 }
4065
4066 sub git_patchset_body {
4067         my ($fd, $difftree, $hash, @hash_parents) = @_;
4068         my ($hash_parent) = $hash_parents[0];
4069
4070         my $is_combined = (@hash_parents > 1);
4071         my $patch_idx = 0;
4072         my $patch_number = 0;
4073         my $patch_line;
4074         my $diffinfo;
4075         my $to_name;
4076         my (%from, %to);
4077
4078         print "<div class=\"patchset\">\n";
4079
4080         # skip to first patch
4081         while ($patch_line = <$fd>) {
4082                 chomp $patch_line;
4083
4084                 last if ($patch_line =~ m/^diff /);
4085         }
4086
4087  PATCH:
4088         while ($patch_line) {
4089
4090                 # parse "git diff" header line
4091                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4092                         # $1 is from_name, which we do not use
4093                         $to_name = unquote($2);
4094                         $to_name =~ s!^b/!!;
4095                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4096                         # $1 is 'cc' or 'combined', which we do not use
4097                         $to_name = unquote($2);
4098                 } else {
4099                         $to_name = undef;
4100                 }
4101
4102                 # check if current patch belong to current raw line
4103                 # and parse raw git-diff line if needed
4104                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4105                         # this is continuation of a split patch
4106                         print "<div class=\"patch cont\">\n";
4107                 } else {
4108                         # advance raw git-diff output if needed
4109                         $patch_idx++ if defined $diffinfo;
4110
4111                         # read and prepare patch information
4112                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4113
4114                         # compact combined diff output can have some patches skipped
4115                         # find which patch (using pathname of result) we are at now;
4116                         if ($is_combined) {
4117                                 while ($to_name ne $diffinfo->{'to_file'}) {
4118                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4119                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4120                                               "</div>\n";  # class="patch"
4121
4122                                         $patch_idx++;
4123                                         $patch_number++;
4124
4125                                         last if $patch_idx > $#$difftree;
4126                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4127                                 }
4128                         }
4129
4130                         # modifies %from, %to hashes
4131                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4132
4133                         # this is first patch for raw difftree line with $patch_idx index
4134                         # we index @$difftree array from 0, but number patches from 1
4135                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4136                 }
4137
4138                 # git diff header
4139                 #assert($patch_line =~ m/^diff /) if DEBUG;
4140                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4141                 $patch_number++;
4142                 # print "git diff" header
4143                 print format_git_diff_header_line($patch_line, $diffinfo,
4144                                                   \%from, \%to);
4145
4146                 # print extended diff header
4147                 print "<div class=\"diff extended_header\">\n";
4148         EXTENDED_HEADER:
4149                 while ($patch_line = <$fd>) {
4150                         chomp $patch_line;
4151
4152                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4153
4154                         print format_extended_diff_header_line($patch_line, $diffinfo,
4155                                                                \%from, \%to);
4156                 }
4157                 print "</div>\n"; # class="diff extended_header"
4158
4159                 # from-file/to-file diff header
4160                 if (! $patch_line) {
4161                         print "</div>\n"; # class="patch"
4162                         last PATCH;
4163                 }
4164                 next PATCH if ($patch_line =~ m/^diff /);
4165                 #assert($patch_line =~ m/^---/) if DEBUG;
4166
4167                 my $last_patch_line = $patch_line;
4168                 $patch_line = <$fd>;
4169                 chomp $patch_line;
4170                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4171
4172                 print format_diff_from_to_header($last_patch_line, $patch_line,
4173                                                  $diffinfo, \%from, \%to,
4174                                                  @hash_parents);
4175
4176                 # the patch itself
4177         LINE:
4178                 while ($patch_line = <$fd>) {
4179                         chomp $patch_line;
4180
4181                         next PATCH if ($patch_line =~ m/^diff /);
4182
4183                         print format_diff_line($patch_line, \%from, \%to);
4184                 }
4185
4186         } continue {
4187                 print "</div>\n"; # class="patch"
4188         }
4189
4190         # for compact combined (--cc) format, with chunk and patch simpliciaction
4191         # patchset might be empty, but there might be unprocessed raw lines
4192         for (++$patch_idx if $patch_number > 0;
4193              $patch_idx < @$difftree;
4194              ++$patch_idx) {
4195                 # read and prepare patch information
4196                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4197
4198                 # generate anchor for "patch" links in difftree / whatchanged part
4199                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4200                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4201                       "</div>\n";  # class="patch"
4202
4203                 $patch_number++;
4204         }
4205
4206         if ($patch_number == 0) {
4207                 if (@hash_parents > 1) {
4208                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4209                 } else {
4210                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4211                 }
4212         }
4213
4214         print "</div>\n"; # class="patchset"
4215 }
4216
4217 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4218
4219 # fills project list info (age, description, owner, forks) for each
4220 # project in the list, removing invalid projects from returned list
4221 # NOTE: modifies $projlist, but does not remove entries from it
4222 sub fill_project_list_info {
4223         my ($projlist, $check_forks) = @_;
4224         my @projects;
4225
4226         my $show_ctags = gitweb_check_feature('ctags');
4227  PROJECT:
4228         foreach my $pr (@$projlist) {
4229                 my (@activity) = git_get_last_activity($pr->{'path'});
4230                 unless (@activity) {
4231                         next PROJECT;
4232                 }
4233                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4234                 if (!defined $pr->{'descr'}) {
4235                         my $descr = git_get_project_description($pr->{'path'}) || "";
4236                         $descr = to_utf8($descr);
4237                         $pr->{'descr_long'} = $descr;
4238                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4239                 }
4240                 if (!defined $pr->{'owner'}) {
4241                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4242                 }
4243                 if ($check_forks) {
4244                         my $pname = $pr->{'path'};
4245                         if (($pname =~ s/\.git$//) &&
4246                             ($pname !~ /\/$/) &&
4247                             (-d "$projectroot/$pname")) {
4248                                 $pr->{'forks'} = "-d $projectroot/$pname";
4249                         } else {
4250                                 $pr->{'forks'} = 0;
4251                         }
4252                 }
4253                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4254                 push @projects, $pr;
4255         }
4256
4257         return @projects;
4258 }
4259
4260 # print 'sort by' <th> element, generating 'sort by $name' replay link
4261 # if that order is not selected
4262 sub print_sort_th {
4263         my ($name, $order, $header) = @_;
4264         $header ||= ucfirst($name);
4265
4266         if ($order eq $name) {
4267                 print "<th>$header</th>\n";
4268         } else {
4269                 print "<th>" .
4270                       $cgi->a({-href => href(-replay=>1, order=>$name),
4271                                -class => "header"}, $header) .
4272                       "</th>\n";
4273         }
4274 }
4275
4276 sub git_project_list_body {
4277         # actually uses global variable $project
4278         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4279
4280         my $check_forks = gitweb_check_feature('forks');
4281         my @projects = fill_project_list_info($projlist, $check_forks);
4282
4283         $order ||= $default_projects_order;
4284         $from = 0 unless defined $from;
4285         $to = $#projects if (!defined $to || $#projects < $to);
4286
4287         my %order_info = (
4288                 project => { key => 'path', type => 'str' },
4289                 descr => { key => 'descr_long', type => 'str' },
4290                 owner => { key => 'owner', type => 'str' },
4291                 age => { key => 'age', type => 'num' }
4292         );
4293         my $oi = $order_info{$order};
4294         if ($oi->{'type'} eq 'str') {
4295                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4296         } else {
4297                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4298         }
4299
4300         my $show_ctags = gitweb_check_feature('ctags');
4301         if ($show_ctags) {
4302                 my %ctags;
4303                 foreach my $p (@projects) {
4304                         foreach my $ct (keys %{$p->{'ctags'}}) {
4305                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4306                         }
4307                 }
4308                 my $cloud = git_populate_project_tagcloud(\%ctags);
4309                 print git_show_project_tagcloud($cloud, 64);
4310         }
4311
4312         print "<table class=\"project_list\">\n";
4313         unless ($no_header) {
4314                 print "<tr>\n";
4315                 if ($check_forks) {
4316                         print "<th></th>\n";
4317                 }
4318                 print_sort_th('project', $order, 'Project');
4319                 print_sort_th('descr', $order, 'Description');
4320                 print_sort_th('owner', $order, 'Owner');
4321                 print_sort_th('age', $order, 'Last Change');
4322                 print "<th></th>\n" . # for links
4323                       "</tr>\n";
4324         }
4325         my $alternate = 1;
4326         my $tagfilter = $cgi->param('by_tag');
4327         for (my $i = $from; $i <= $to; $i++) {
4328                 my $pr = $projects[$i];
4329
4330                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4331                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4332                         and not $pr->{'descr_long'} =~ /$searchtext/;
4333                 # Weed out forks or non-matching entries of search
4334                 if ($check_forks) {
4335                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4336                         $forkbase="^$forkbase" if $forkbase;
4337                         next if not $searchtext and not $tagfilter and $show_ctags
4338                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4339                 }
4340
4341                 if ($alternate) {
4342                         print "<tr class=\"dark\">\n";
4343                 } else {
4344                         print "<tr class=\"light\">\n";
4345                 }
4346                 $alternate ^= 1;
4347                 if ($check_forks) {
4348                         print "<td>";
4349                         if ($pr->{'forks'}) {
4350                                 print "<!-- $pr->{'forks'} -->\n";
4351                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4352                         }
4353                         print "</td>\n";
4354                 }
4355                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4356                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4357                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4358                                         -class => "list", -title => $pr->{'descr_long'}},
4359                                         esc_html($pr->{'descr'})) . "</td>\n" .
4360                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4361                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4362                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4363                       "<td class=\"link\">" .
4364                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4365                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
4366                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4367                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4368                       "</td>\n" .
4369                       "</tr>\n";
4370         }
4371         if (defined $extra) {
4372                 print "<tr>\n";
4373                 if ($check_forks) {
4374                         print "<td></td>\n";
4375                 }
4376                 print "<td colspan=\"5\">$extra</td>\n" .
4377                       "</tr>\n";
4378         }
4379         print "</table>\n";
4380 }
4381
4382 sub git_shortlog_body {
4383         # uses global variable $project
4384         my ($commitlist, $from, $to, $refs, $extra) = @_;
4385
4386         $from = 0 unless defined $from;
4387         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4388
4389         print "<table class=\"shortlog\">\n";
4390         my $alternate = 1;
4391         for (my $i = $from; $i <= $to; $i++) {
4392                 my %co = %{$commitlist->[$i]};
4393                 my $commit = $co{'id'};
4394                 my $ref = format_ref_marker($refs, $commit);
4395                 if ($alternate) {
4396                         print "<tr class=\"dark\">\n";
4397                 } else {
4398                         print "<tr class=\"light\">\n";
4399                 }
4400                 $alternate ^= 1;
4401                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4402                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4403                       format_author_html('td', \%co, 10) . "<td>";
4404                 print format_subject_html($co{'title'}, $co{'title_short'},
4405                                           href(action=>"commit", hash=>$commit), $ref);
4406                 print "</td>\n" .
4407                       "<td class=\"link\">" .
4408                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4409                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4410                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4411                 my $snapshot_links = format_snapshot_links($commit);
4412                 if (defined $snapshot_links) {
4413                         print " | " . $snapshot_links;
4414                 }
4415                 print "</td>\n" .
4416                       "</tr>\n";
4417         }
4418         if (defined $extra) {
4419                 print "<tr>\n" .
4420                       "<td colspan=\"4\">$extra</td>\n" .
4421                       "</tr>\n";
4422         }
4423         print "</table>\n";
4424 }
4425
4426 sub git_history_body {
4427         # Warning: assumes constant type (blob or tree) during history
4428         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4429
4430         $from = 0 unless defined $from;
4431         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4432
4433         print "<table class=\"history\">\n";
4434         my $alternate = 1;
4435         for (my $i = $from; $i <= $to; $i++) {
4436                 my %co = %{$commitlist->[$i]};
4437                 if (!%co) {
4438                         next;
4439                 }
4440                 my $commit = $co{'id'};
4441
4442                 my $ref = format_ref_marker($refs, $commit);
4443
4444                 if ($alternate) {
4445                         print "<tr class=\"dark\">\n";
4446                 } else {
4447                         print "<tr class=\"light\">\n";
4448                 }
4449                 $alternate ^= 1;
4450                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4451         # shortlog:   format_author_html('td', \%co, 10)
4452                       format_author_html('td', \%co, 15, 3) . "<td>";
4453                 # originally git_history used chop_str($co{'title'}, 50)
4454                 print format_subject_html($co{'title'}, $co{'title_short'},
4455                                           href(action=>"commit", hash=>$commit), $ref);
4456                 print "</td>\n" .
4457                       "<td class=\"link\">" .
4458                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4459                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4460
4461                 if ($ftype eq 'blob') {
4462                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4463                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4464                         if (defined $blob_current && defined $blob_parent &&
4465                                         $blob_current ne $blob_parent) {
4466                                 print " | " .
4467                                         $cgi->a({-href => href(action=>"blobdiff",
4468                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4469                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4470                                                                file_name=>$file_name)},
4471                                                 "diff to current");
4472                         }
4473                 }
4474                 print "</td>\n" .
4475                       "</tr>\n";
4476         }
4477         if (defined $extra) {
4478                 print "<tr>\n" .
4479                       "<td colspan=\"4\">$extra</td>\n" .
4480                       "</tr>\n";
4481         }
4482         print "</table>\n";
4483 }
4484
4485 sub git_tags_body {
4486         # uses global variable $project
4487         my ($taglist, $from, $to, $extra) = @_;
4488         $from = 0 unless defined $from;
4489         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4490
4491         print "<table class=\"tags\">\n";
4492         my $alternate = 1;
4493         for (my $i = $from; $i <= $to; $i++) {
4494                 my $entry = $taglist->[$i];
4495                 my %tag = %$entry;
4496                 my $comment = $tag{'subject'};
4497                 my $comment_short;
4498                 if (defined $comment) {
4499                         $comment_short = chop_str($comment, 30, 5);
4500                 }
4501                 if ($alternate) {
4502                         print "<tr class=\"dark\">\n";
4503                 } else {
4504                         print "<tr class=\"light\">\n";
4505                 }
4506                 $alternate ^= 1;
4507                 if (defined $tag{'age'}) {
4508                         print "<td><i>$tag{'age'}</i></td>\n";
4509                 } else {
4510                         print "<td></td>\n";
4511                 }
4512                 print "<td>" .
4513                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4514                                -class => "list name"}, esc_html($tag{'name'})) .
4515                       "</td>\n" .
4516                       "<td>";
4517                 if (defined $comment) {
4518                         print format_subject_html($comment, $comment_short,
4519                                                   href(action=>"tag", hash=>$tag{'id'}));
4520                 }
4521                 print "</td>\n" .
4522                       "<td class=\"selflink\">";
4523                 if ($tag{'type'} eq "tag") {
4524                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4525                 } else {
4526                         print "&nbsp;";
4527                 }
4528                 print "</td>\n" .
4529                       "<td class=\"link\">" . " | " .
4530                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4531                 if ($tag{'reftype'} eq "commit") {
4532                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
4533                 } elsif ($tag{'reftype'} eq "blob") {
4534                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4535                 }
4536                 print "</td>\n" .
4537                       "</tr>";
4538         }
4539         if (defined $extra) {
4540                 print "<tr>\n" .
4541                       "<td colspan=\"5\">$extra</td>\n" .
4542                       "</tr>\n";
4543         }
4544         print "</table>\n";
4545 }
4546
4547 sub git_heads_body {
4548         # uses global variable $project
4549         my ($headlist, $head, $from, $to, $extra) = @_;
4550         $from = 0 unless defined $from;
4551         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4552
4553         print "<table class=\"heads\">\n";
4554         my $alternate = 1;
4555         for (my $i = $from; $i <= $to; $i++) {
4556                 my $entry = $headlist->[$i];
4557                 my %ref = %$entry;
4558                 my $curr = $ref{'id'} eq $head;
4559                 if ($alternate) {
4560                         print "<tr class=\"dark\">\n";
4561                 } else {
4562                         print "<tr class=\"light\">\n";
4563                 }
4564                 $alternate ^= 1;
4565                 print "<td><i>$ref{'age'}</i></td>\n" .
4566                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4567                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4568                                -class => "list name"},esc_html($ref{'name'})) .
4569                       "</td>\n" .
4570                       "<td class=\"link\">" .
4571                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
4572                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4573                       "</td>\n" .
4574                       "</tr>";
4575         }
4576         if (defined $extra) {
4577                 print "<tr>\n" .
4578                       "<td colspan=\"3\">$extra</td>\n" .
4579                       "</tr>\n";
4580         }
4581         print "</table>\n";
4582 }
4583
4584 sub git_search_grep_body {
4585         my ($commitlist, $from, $to, $extra) = @_;
4586         $from = 0 unless defined $from;
4587         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4588
4589         print "<table class=\"commit_search\">\n";
4590         my $alternate = 1;
4591         for (my $i = $from; $i <= $to; $i++) {
4592                 my %co = %{$commitlist->[$i]};
4593                 if (!%co) {
4594                         next;
4595                 }
4596                 my $commit = $co{'id'};
4597                 if ($alternate) {
4598                         print "<tr class=\"dark\">\n";
4599                 } else {
4600                         print "<tr class=\"light\">\n";
4601                 }
4602                 $alternate ^= 1;
4603                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4604                       format_author_html('td', \%co, 15, 5) .
4605                       "<td>" .
4606                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4607                                -class => "list subject"},
4608                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4609                 my $comment = $co{'comment'};
4610                 foreach my $line (@$comment) {
4611                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4612                                 my ($lead, $match, $trail) = ($1, $2, $3);
4613                                 $match = chop_str($match, 70, 5, 'center');
4614                                 my $contextlen = int((80 - length($match))/2);
4615                                 $contextlen = 30 if ($contextlen > 30);
4616                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4617                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4618
4619                                 $lead  = esc_html($lead);
4620                                 $match = esc_html($match);
4621                                 $trail = esc_html($trail);
4622
4623                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4624                         }
4625                 }
4626                 print "</td>\n" .
4627                       "<td class=\"link\">" .
4628                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4629                       " | " .
4630                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4631                       " | " .
4632                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4633                 print "</td>\n" .
4634                       "</tr>\n";
4635         }
4636         if (defined $extra) {
4637                 print "<tr>\n" .
4638                       "<td colspan=\"3\">$extra</td>\n" .
4639                       "</tr>\n";
4640         }
4641         print "</table>\n";
4642 }
4643
4644 ## ======================================================================
4645 ## ======================================================================
4646 ## actions
4647
4648 sub git_project_list {
4649         my $order = $input_params{'order'};
4650         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4651                 die_error(400, "Unknown order parameter");
4652         }
4653
4654         my @list = git_get_projects_list();
4655         if (!@list) {
4656                 die_error(404, "No projects found");
4657         }
4658
4659         git_header_html();
4660         if (-f $home_text) {
4661                 print "<div class=\"index_include\">\n";
4662                 insert_file($home_text);
4663                 print "</div>\n";
4664         }
4665         print $cgi->startform(-method => "get") .
4666               "<p class=\"projsearch\">Search:\n" .
4667               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4668               "</p>" .
4669               $cgi->end_form() . "\n";
4670         git_project_list_body(\@list, $order);
4671         git_footer_html();
4672 }
4673
4674 sub git_forks {
4675         my $order = $input_params{'order'};
4676         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4677                 die_error(400, "Unknown order parameter");
4678         }
4679
4680         my @list = git_get_projects_list($project);
4681         if (!@list) {
4682                 die_error(404, "No forks found");
4683         }
4684
4685         git_header_html();
4686         git_print_page_nav('','');
4687         git_print_header_div('summary', "$project forks");
4688         git_project_list_body(\@list, $order);
4689         git_footer_html();
4690 }
4691
4692 sub git_project_index {
4693         my @projects = git_get_projects_list($project);
4694
4695         print $cgi->header(
4696                 -type => 'text/plain',
4697                 -charset => 'utf-8',
4698                 -content_disposition => 'inline; filename="index.aux"');
4699
4700         foreach my $pr (@projects) {
4701                 if (!exists $pr->{'owner'}) {
4702                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4703                 }
4704
4705                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4706                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4707                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4708                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4709                 $path  =~ s/ /\+/g;
4710                 $owner =~ s/ /\+/g;
4711
4712                 print "$path $owner\n";
4713         }
4714 }
4715
4716 sub git_summary {
4717         my $descr = git_get_project_description($project) || "none";
4718         my %co = parse_commit("HEAD");
4719         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4720         my $head = $co{'id'};
4721
4722         my $owner = git_get_project_owner($project);
4723
4724         my $refs = git_get_references();
4725         # These get_*_list functions return one more to allow us to see if
4726         # there are more ...
4727         my @taglist  = git_get_tags_list(16);
4728         my @headlist = git_get_heads_list(16);
4729         my @forklist;
4730         my $check_forks = gitweb_check_feature('forks');
4731
4732         if ($check_forks) {
4733                 @forklist = git_get_projects_list($project);
4734         }
4735
4736         git_header_html();
4737         git_print_page_nav('summary','', $head);
4738
4739         print "<div class=\"title\">&nbsp;</div>\n";
4740         print "<table class=\"projects_list\">\n" .
4741               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4742               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4743         if (defined $cd{'rfc2822'}) {
4744                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4745         }
4746
4747         # use per project git URL list in $projectroot/$project/cloneurl
4748         # or make project git URL from git base URL and project name
4749         my $url_tag = "URL";
4750         my @url_list = git_get_project_url_list($project);
4751         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4752         foreach my $git_url (@url_list) {
4753                 next unless $git_url;
4754                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4755                 $url_tag = "";
4756         }
4757
4758         # Tag cloud
4759         my $show_ctags = gitweb_check_feature('ctags');
4760         if ($show_ctags) {
4761                 my $ctags = git_get_project_ctags($project);
4762                 my $cloud = git_populate_project_tagcloud($ctags);
4763                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4764                 print "</td>\n<td>" unless %$ctags;
4765                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4766                 print "</td>\n<td>" if %$ctags;
4767                 print git_show_project_tagcloud($cloud, 48);
4768                 print "</td></tr>";
4769         }
4770
4771         print "</table>\n";
4772
4773         # If XSS prevention is on, we don't include README.html.
4774         # TODO: Allow a readme in some safe format.
4775         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4776                 print "<div class=\"title\">readme</div>\n" .
4777                       "<div class=\"readme\">\n";
4778                 insert_file("$projectroot/$project/README.html");
4779                 print "\n</div>\n"; # class="readme"
4780         }
4781
4782         # we need to request one more than 16 (0..15) to check if
4783         # those 16 are all
4784         my @commitlist = $head ? parse_commits($head, 17) : ();
4785         if (@commitlist) {
4786                 git_print_header_div('shortlog');
4787                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4788                                   $#commitlist <=  15 ? undef :
4789                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4790         }
4791
4792         if (@taglist) {
4793                 git_print_header_div('tags');
4794                 git_tags_body(\@taglist, 0, 15,
4795                               $#taglist <=  15 ? undef :
4796                               $cgi->a({-href => href(action=>"tags")}, "..."));
4797         }
4798
4799         if (@headlist) {
4800                 git_print_header_div('heads');
4801                 git_heads_body(\@headlist, $head, 0, 15,
4802                                $#headlist <= 15 ? undef :
4803                                $cgi->a({-href => href(action=>"heads")}, "..."));
4804         }
4805
4806         if (@forklist) {
4807                 git_print_header_div('forks');
4808                 git_project_list_body(\@forklist, 'age', 0, 15,
4809                                       $#forklist <= 15 ? undef :
4810                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4811                                       'no_header');
4812         }
4813
4814         git_footer_html();
4815 }
4816
4817 sub git_tag {
4818         my $head = git_get_head_hash($project);
4819         git_header_html();
4820         git_print_page_nav('','', $head,undef,$head);
4821         my %tag = parse_tag($hash);
4822
4823         if (! %tag) {
4824                 die_error(404, "Unknown tag object");
4825         }
4826
4827         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4828         print "<div class=\"title_text\">\n" .
4829               "<table class=\"object_header\">\n" .
4830               "<tr>\n" .
4831               "<td>object</td>\n" .
4832               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4833                                $tag{'object'}) . "</td>\n" .
4834               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4835                                               $tag{'type'}) . "</td>\n" .
4836               "</tr>\n";
4837         if (defined($tag{'author'})) {
4838                 git_print_authorship_rows(\%tag, 'author');
4839         }
4840         print "</table>\n\n" .
4841               "</div>\n";
4842         print "<div class=\"page_body\">";
4843         my $comment = $tag{'comment'};
4844         foreach my $line (@$comment) {
4845                 chomp $line;
4846                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4847         }
4848         print "</div>\n";
4849         git_footer_html();
4850 }
4851
4852 sub git_blame {
4853         # permissions
4854         gitweb_check_feature('blame')
4855                 or die_error(403, "Blame view not allowed");
4856
4857         # error checking
4858         die_error(400, "No file name given") unless $file_name;
4859         $hash_base ||= git_get_head_hash($project);
4860         die_error(404, "Couldn't find base commit") unless $hash_base;
4861         my %co = parse_commit($hash_base)
4862                 or die_error(404, "Commit not found");
4863         my $ftype = "blob";
4864         if (!defined $hash) {
4865                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4866                         or die_error(404, "Error looking up file");
4867         } else {
4868                 $ftype = git_get_type($hash);
4869                 if ($ftype !~ "blob") {
4870                         die_error(400, "Object is not a blob");
4871                 }
4872         }
4873
4874         # run git-blame --porcelain
4875         open my $fd, "-|", git_cmd(), "blame", '-p',
4876                 $hash_base, '--', $file_name
4877                 or die_error(500, "Open git-blame failed");
4878
4879         # page header
4880         git_header_html();
4881         my $formats_nav =
4882                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4883                         "blob") .
4884                 " | " .
4885                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4886                         "history") .
4887                 " | " .
4888                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4889                         "HEAD");
4890         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4891         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4892         git_print_page_path($file_name, $ftype, $hash_base);
4893
4894         # page body
4895         my @rev_color = qw(light dark);
4896         my $num_colors = scalar(@rev_color);
4897         my $current_color = 0;
4898         my %metainfo = ();
4899
4900         print <<HTML;
4901 <div class="page_body">
4902 <table class="blame">
4903 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4904 HTML
4905  LINE:
4906         while (my $line = <$fd>) {
4907                 chomp $line;
4908                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4909                 # no <lines in group> for subsequent lines in group of lines
4910                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4911                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4912                 if (!exists $metainfo{$full_rev}) {
4913                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4914                 }
4915                 my $meta = $metainfo{$full_rev};
4916                 my $data;
4917                 while ($data = <$fd>) {
4918                         chomp $data;
4919                         last if ($data =~ s/^\t//); # contents of line
4920                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4921                                 $meta->{$1} = $2 unless exists $meta->{$1};
4922                         }
4923                         if ($data =~ /^previous /) {
4924                                 $meta->{'nprevious'}++;
4925                         }
4926                 }
4927                 my $short_rev = substr($full_rev, 0, 8);
4928                 my $author = $meta->{'author'};
4929                 my %date =
4930                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4931                 my $date = $date{'iso-tz'};
4932                 if ($group_size) {
4933                         $current_color = ($current_color + 1) % $num_colors;
4934                 }
4935                 my $tr_class = $rev_color[$current_color];
4936                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4937                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4938                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4939                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4940                 if ($group_size) {
4941                         print "<td class=\"sha1\"";
4942                         print " title=\"". esc_html($author) . ", $date\"";
4943                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4944                         print ">";
4945                         print $cgi->a({-href => href(action=>"commit",
4946                                                      hash=>$full_rev,
4947                                                      file_name=>$file_name)},
4948                                       esc_html($short_rev));
4949                         if ($group_size >= 2) {
4950                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4951                                 if (@author_initials) {
4952                                         print "<br />" .
4953                                               esc_html(join('', @author_initials));
4954                                         #           or join('.', ...)
4955                                 }
4956                         }
4957                         print "</td>\n";
4958                 }
4959                 # 'previous' <sha1 of parent commit> <filename at commit>
4960                 if (exists $meta->{'previous'} &&
4961                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4962                         $meta->{'parent'} = $1;
4963                         $meta->{'file_parent'} = unquote($2);
4964                 }
4965                 my $linenr_commit =
4966                         exists($meta->{'parent'}) ?
4967                         $meta->{'parent'} : $full_rev;
4968                 my $linenr_filename =
4969                         exists($meta->{'file_parent'}) ?
4970                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4971                 my $blamed = href(action => 'blame',
4972                                   file_name => $linenr_filename,
4973                                   hash_base => $linenr_commit);
4974                 print "<td class=\"linenr\">";
4975                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4976                                 -class => "linenr" },
4977                               esc_html($lineno));
4978                 print "</td>";
4979                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4980                 print "</tr>\n";
4981         }
4982         print "</table>\n";
4983         print "</div>";
4984         close $fd
4985                 or print "Reading blob failed\n";
4986
4987         # page footer
4988         git_footer_html();
4989 }
4990
4991 sub git_tags {
4992         my $head = git_get_head_hash($project);
4993         git_header_html();
4994         git_print_page_nav('','', $head,undef,$head);
4995         git_print_header_div('summary', $project);
4996
4997         my @tagslist = git_get_tags_list();
4998         if (@tagslist) {
4999                 git_tags_body(\@tagslist);
5000         }
5001         git_footer_html();
5002 }
5003
5004 sub git_heads {
5005         my $head = git_get_head_hash($project);
5006         git_header_html();
5007         git_print_page_nav('','', $head,undef,$head);
5008         git_print_header_div('summary', $project);
5009
5010         my @headslist = git_get_heads_list();
5011         if (@headslist) {
5012                 git_heads_body(\@headslist, $head);
5013         }
5014         git_footer_html();
5015 }
5016
5017 sub git_blob_plain {
5018         my $type = shift;
5019         my $expires;
5020
5021         if (!defined $hash) {
5022                 if (defined $file_name) {
5023                         my $base = $hash_base || git_get_head_hash($project);
5024                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5025                                 or die_error(404, "Cannot find file");
5026                 } else {
5027                         die_error(400, "No file name defined");
5028                 }
5029         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5030                 # blobs defined by non-textual hash id's can be cached
5031                 $expires = "+1d";
5032         }
5033
5034         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5035                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5036
5037         # content-type (can include charset)
5038         $type = blob_contenttype($fd, $file_name, $type);
5039
5040         # "save as" filename, even when no $file_name is given
5041         my $save_as = "$hash";
5042         if (defined $file_name) {
5043                 $save_as = $file_name;
5044         } elsif ($type =~ m/^text\//) {
5045                 $save_as .= '.txt';
5046         }
5047
5048         # With XSS prevention on, blobs of all types except a few known safe
5049         # ones are served with "Content-Disposition: attachment" to make sure
5050         # they don't run in our security domain.  For certain image types,
5051         # blob view writes an <img> tag referring to blob_plain view, and we
5052         # want to be sure not to break that by serving the image as an
5053         # attachment (though Firefox 3 doesn't seem to care).
5054         my $sandbox = $prevent_xss &&
5055                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5056
5057         print $cgi->header(
5058                 -type => $type,
5059                 -expires => $expires,
5060                 -content_disposition =>
5061                         ($sandbox ? 'attachment' : 'inline')
5062                         . '; filename="' . $save_as . '"');
5063         local $/ = undef;
5064         binmode STDOUT, ':raw';
5065         print <$fd>;
5066         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5067         close $fd;
5068 }
5069
5070 sub git_blob {
5071         my $expires;
5072
5073         if (!defined $hash) {
5074                 if (defined $file_name) {
5075                         my $base = $hash_base || git_get_head_hash($project);
5076                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5077                                 or die_error(404, "Cannot find file");
5078                 } else {
5079                         die_error(400, "No file name defined");
5080                 }
5081         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5082                 # blobs defined by non-textual hash id's can be cached
5083                 $expires = "+1d";
5084         }
5085
5086         my $have_blame = gitweb_check_feature('blame');
5087         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5088                 or die_error(500, "Couldn't cat $file_name, $hash");
5089         my $mimetype = blob_mimetype($fd, $file_name);
5090         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5091                 close $fd;
5092                 return git_blob_plain($mimetype);
5093         }
5094         # we can have blame only for text/* mimetype
5095         $have_blame &&= ($mimetype =~ m!^text/!);
5096
5097         git_header_html(undef, $expires);
5098         my $formats_nav = '';
5099         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5100                 if (defined $file_name) {
5101                         if ($have_blame) {
5102                                 $formats_nav .=
5103                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5104                                                 "blame") .
5105                                         " | ";
5106                         }
5107                         $formats_nav .=
5108                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5109                                         "history") .
5110                                 " | " .
5111                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5112                                         "raw") .
5113                                 " | " .
5114                                 $cgi->a({-href => href(action=>"blob",
5115                                                        hash_base=>"HEAD", file_name=>$file_name)},
5116                                         "HEAD");
5117                 } else {
5118                         $formats_nav .=
5119                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5120                                         "raw");
5121                 }
5122                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5123                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5124         } else {
5125                 print "<div class=\"page_nav\">\n" .
5126                       "<br/><br/></div>\n" .
5127                       "<div class=\"title\">$hash</div>\n";
5128         }
5129         git_print_page_path($file_name, "blob", $hash_base);
5130         print "<div class=\"page_body\">\n";
5131         if ($mimetype =~ m!^image/!) {
5132                 print qq!<img type="$mimetype"!;
5133                 if ($file_name) {
5134                         print qq! alt="$file_name" title="$file_name"!;
5135                 }
5136                 print qq! src="! .
5137                       href(action=>"blob_plain", hash=>$hash,
5138                            hash_base=>$hash_base, file_name=>$file_name) .
5139                       qq!" />\n!;
5140         } else {
5141                 my $nr;
5142                 while (my $line = <$fd>) {
5143                         chomp $line;
5144                         $nr++;
5145                         $line = untabify($line);
5146                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5147                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5148                 }
5149         }
5150         close $fd
5151                 or print "Reading blob failed.\n";
5152         print "</div>";
5153         git_footer_html();
5154 }
5155
5156 sub git_tree {
5157         if (!defined $hash_base) {
5158                 $hash_base = "HEAD";
5159         }
5160         if (!defined $hash) {
5161                 if (defined $file_name) {
5162                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5163                 } else {
5164                         $hash = $hash_base;
5165                 }
5166         }
5167         die_error(404, "No such tree") unless defined($hash);
5168
5169         my $show_sizes = gitweb_check_feature('show-sizes');
5170         my $have_blame = gitweb_check_feature('blame');
5171
5172         my @entries = ();
5173         {
5174                 local $/ = "\0";
5175                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5176                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5177                         or die_error(500, "Open git-ls-tree failed");
5178                 @entries = map { chomp; $_ } <$fd>;
5179                 close $fd
5180                         or die_error(404, "Reading tree failed");
5181         }
5182
5183         my $refs = git_get_references();
5184         my $ref = format_ref_marker($refs, $hash_base);
5185         git_header_html();
5186         my $basedir = '';
5187         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5188                 my @views_nav = ();
5189                 if (defined $file_name) {
5190                         push @views_nav,
5191                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5192                                         "history"),
5193                                 $cgi->a({-href => href(action=>"tree",
5194                                                        hash_base=>"HEAD", file_name=>$file_name)},
5195                                         "HEAD"),
5196                 }
5197                 my $snapshot_links = format_snapshot_links($hash);
5198                 if (defined $snapshot_links) {
5199                         # FIXME: Should be available when we have no hash base as well.
5200                         push @views_nav, $snapshot_links;
5201                 }
5202                 git_print_page_nav('tree','', $hash_base, undef, undef,
5203                                    join(' | ', @views_nav));
5204                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5205         } else {
5206                 undef $hash_base;
5207                 print "<div class=\"page_nav\">\n";
5208                 print "<br/><br/></div>\n";
5209                 print "<div class=\"title\">$hash</div>\n";
5210         }
5211         if (defined $file_name) {
5212                 $basedir = $file_name;
5213                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5214                         $basedir .= '/';
5215                 }
5216                 git_print_page_path($file_name, 'tree', $hash_base);
5217         }
5218         print "<div class=\"page_body\">\n";
5219         print "<table class=\"tree\">\n";
5220         my $alternate = 1;
5221         # '..' (top directory) link if possible
5222         if (defined $hash_base &&
5223             defined $file_name && $file_name =~ m![^/]+$!) {
5224                 if ($alternate) {
5225                         print "<tr class=\"dark\">\n";
5226                 } else {
5227                         print "<tr class=\"light\">\n";
5228                 }
5229                 $alternate ^= 1;
5230
5231                 my $up = $file_name;
5232                 $up =~ s!/?[^/]+$!!;
5233                 undef $up unless $up;
5234                 # based on git_print_tree_entry
5235                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5236                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5237                 print '<td class="list">';
5238                 print $cgi->a({-href => href(action=>"tree",
5239                                              hash_base=>$hash_base,
5240                                              file_name=>$up)},
5241                               "..");
5242                 print "</td>\n";
5243                 print "<td class=\"link\"></td>\n";
5244
5245                 print "</tr>\n";
5246         }
5247         foreach my $line (@entries) {
5248                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5249
5250                 if ($alternate) {
5251                         print "<tr class=\"dark\">\n";
5252                 } else {
5253                         print "<tr class=\"light\">\n";
5254                 }
5255                 $alternate ^= 1;
5256
5257                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5258
5259                 print "</tr>\n";
5260         }
5261         print "</table>\n" .
5262               "</div>";
5263         git_footer_html();
5264 }
5265
5266 sub git_snapshot {
5267         my $format = $input_params{'snapshot_format'};
5268         if (!@snapshot_fmts) {
5269                 die_error(403, "Snapshots not allowed");
5270         }
5271         # default to first supported snapshot format
5272         $format ||= $snapshot_fmts[0];
5273         if ($format !~ m/^[a-z0-9]+$/) {
5274                 die_error(400, "Invalid snapshot format parameter");
5275         } elsif (!exists($known_snapshot_formats{$format})) {
5276                 die_error(400, "Unknown snapshot format");
5277         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5278                 die_error(403, "Snapshot format not allowed");
5279         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5280                 die_error(403, "Unsupported snapshot format");
5281         }
5282
5283         if (!defined $hash) {
5284                 $hash = git_get_head_hash($project);
5285         }
5286
5287         my $name = $project;
5288         $name =~ s,([^/])/*\.git$,$1,;
5289         $name = basename($name);
5290         my $filename = to_utf8($name);
5291         $name =~ s/\047/\047\\\047\047/g;
5292         my $cmd;
5293         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5294         $cmd = quote_command(
5295                 git_cmd(), 'archive',
5296                 "--format=$known_snapshot_formats{$format}{'format'}",
5297                 "--prefix=$name/", $hash);
5298         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5299                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5300         }
5301
5302         print $cgi->header(
5303                 -type => $known_snapshot_formats{$format}{'type'},
5304                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5305                 -status => '200 OK');
5306
5307         open my $fd, "-|", $cmd
5308                 or die_error(500, "Execute git-archive failed");
5309         binmode STDOUT, ':raw';
5310         print <$fd>;
5311         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5312         close $fd;
5313 }
5314
5315 sub git_log {
5316         my $head = git_get_head_hash($project);
5317         if (!defined $hash) {
5318                 $hash = $head;
5319         }
5320         if (!defined $page) {
5321                 $page = 0;
5322         }
5323         my $refs = git_get_references();
5324
5325         my @commitlist = parse_commits($hash, 101, (100 * $page));
5326
5327         my $paging_nav = format_log_nav('log', $hash, $head, $page, $#commitlist >= 100);
5328
5329         {
5330                 local $action = 'fulllog';
5331                 git_header_html();
5332         }
5333         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5334
5335         if (!@commitlist) {
5336                 my %co = parse_commit($hash);
5337
5338                 git_print_header_div('summary', $project);
5339                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5340         }
5341         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5342         for (my $i = 0; $i <= $to; $i++) {
5343                 my %co = %{$commitlist[$i]};
5344                 next if !%co;
5345                 my $commit = $co{'id'};
5346                 my $ref = format_ref_marker($refs, $commit);
5347                 my %ad = parse_date($co{'author_epoch'});
5348                 git_print_header_div('commit',
5349                                "<span class=\"age\">$co{'age_string'}</span>" .
5350                                esc_html($co{'title'}) . $ref,
5351                                $commit);
5352                 print "<div class=\"title_text\">\n" .
5353                       "<div class=\"log_link\">\n" .
5354                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5355                       " | " .
5356                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5357                       " | " .
5358                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5359                       "<br/>\n" .
5360                       "</div>\n";
5361                       git_print_authorship(\%co, -tag => 'span');
5362                       print "<br/>\n</div>\n";
5363
5364                 print "<div class=\"log_body\">\n";
5365                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5366                 print "</div>\n";
5367         }
5368         if ($#commitlist >= 100) {
5369                 print "<div class=\"page_nav\">\n";
5370                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5371                                -accesskey => "n", -title => "Alt-n"}, "next");
5372                 print "</div>\n";
5373         }
5374         git_footer_html();
5375 }
5376
5377 sub git_commit {
5378         $hash ||= $hash_base || "HEAD";
5379         my %co = parse_commit($hash)
5380             or die_error(404, "Unknown commit object");
5381
5382         my $parent  = $co{'parent'};
5383         my $parents = $co{'parents'}; # listref
5384
5385         # we need to prepare $formats_nav before any parameter munging
5386         my $formats_nav;
5387         if (!defined $parent) {
5388                 # --root commitdiff
5389                 $formats_nav .= '(initial)';
5390         } elsif (@$parents == 1) {
5391                 # single parent commit
5392                 $formats_nav .=
5393                         '(parent: ' .
5394                         $cgi->a({-href => href(action=>"commit",
5395                                                hash=>$parent)},
5396                                 esc_html(substr($parent, 0, 7))) .
5397                         ')';
5398         } else {
5399                 # merge commit
5400                 $formats_nav .=
5401                         '(merge: ' .
5402                         join(' ', map {
5403                                 $cgi->a({-href => href(action=>"commit",
5404                                                        hash=>$_)},
5405                                         esc_html(substr($_, 0, 7)));
5406                         } @$parents ) .
5407                         ')';
5408         }
5409         if (gitweb_check_feature('patches') && @$parents <= 1) {
5410                 $formats_nav .= " | " .
5411                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5412                                 "patch");
5413         }
5414
5415         if (!defined $parent) {
5416                 $parent = "--root";
5417         }
5418         my @difftree;
5419         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5420                 @diff_opts,
5421                 (@$parents <= 1 ? $parent : '-c'),
5422                 $hash, "--"
5423                 or die_error(500, "Open git-diff-tree failed");
5424         @difftree = map { chomp; $_ } <$fd>;
5425         close $fd or die_error(404, "Reading git-diff-tree failed");
5426
5427         # non-textual hash id's can be cached
5428         my $expires;
5429         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5430                 $expires = "+1d";
5431         }
5432         my $refs = git_get_references();
5433         my $ref = format_ref_marker($refs, $co{'id'});
5434
5435         git_header_html(undef, $expires);
5436         git_print_page_nav('commit', '',
5437                            $hash, $co{'tree'}, $hash,
5438                            $formats_nav);
5439
5440         if (defined $co{'parent'}) {
5441                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5442         } else {
5443                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5444         }
5445         print "<div class=\"title_text\">\n" .
5446               "<table class=\"object_header\">\n";
5447         git_print_authorship_rows(\%co);
5448         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5449         print "<tr>" .
5450               "<td>tree</td>" .
5451               "<td class=\"sha1\">" .
5452               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5453                        class => "list"}, $co{'tree'}) .
5454               "</td>" .
5455               "<td class=\"link\">" .
5456               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5457                       "tree");
5458         my $snapshot_links = format_snapshot_links($hash);
5459         if (defined $snapshot_links) {
5460                 print " | " . $snapshot_links;
5461         }
5462         print "</td>" .
5463               "</tr>\n";
5464
5465         foreach my $par (@$parents) {
5466                 print "<tr>" .
5467                       "<td>parent</td>" .
5468                       "<td class=\"sha1\">" .
5469                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5470                                class => "list"}, $par) .
5471                       "</td>" .
5472                       "<td class=\"link\">" .
5473                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5474                       " | " .
5475                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5476                       "</td>" .
5477                       "</tr>\n";
5478         }
5479         print "</table>".
5480               "</div>\n";
5481
5482         print "<div class=\"page_body\">\n";
5483         git_print_log($co{'comment'});
5484         print "</div>\n";
5485
5486         git_difftree_body(\@difftree, $hash, @$parents);
5487
5488         git_footer_html();
5489 }
5490
5491 sub git_object {
5492         # object is defined by:
5493         # - hash or hash_base alone
5494         # - hash_base and file_name
5495         my $type;
5496
5497         # - hash or hash_base alone
5498         if ($hash || ($hash_base && !defined $file_name)) {
5499                 my $object_id = $hash || $hash_base;
5500
5501                 open my $fd, "-|", quote_command(
5502                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5503                         or die_error(404, "Object does not exist");
5504                 $type = <$fd>;
5505                 chomp $type;
5506                 close $fd
5507                         or die_error(404, "Object does not exist");
5508
5509         # - hash_base and file_name
5510         } elsif ($hash_base && defined $file_name) {
5511                 $file_name =~ s,/+$,,;
5512
5513                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5514                         or die_error(404, "Base object does not exist");
5515
5516                 # here errors should not hapen
5517                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5518                         or die_error(500, "Open git-ls-tree failed");
5519                 my $line = <$fd>;
5520                 close $fd;
5521
5522                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5523                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5524                         die_error(404, "File or directory for given base does not exist");
5525                 }
5526                 $type = $2;
5527                 $hash = $3;
5528         } else {
5529                 die_error(400, "Not enough information to find object");
5530         }
5531
5532         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5533                                           hash=>$hash, hash_base=>$hash_base,
5534                                           file_name=>$file_name),
5535                              -status => '302 Found');
5536 }
5537
5538 sub git_blobdiff {
5539         my $format = shift || 'html';
5540
5541         my $fd;
5542         my @difftree;
5543         my %diffinfo;
5544         my $expires;
5545
5546         # preparing $fd and %diffinfo for git_patchset_body
5547         # new style URI
5548         if (defined $hash_base && defined $hash_parent_base) {
5549                 if (defined $file_name) {
5550                         # read raw output
5551                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5552                                 $hash_parent_base, $hash_base,
5553                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5554                                 or die_error(500, "Open git-diff-tree failed");
5555                         @difftree = map { chomp; $_ } <$fd>;
5556                         close $fd
5557                                 or die_error(404, "Reading git-diff-tree failed");
5558                         @difftree
5559                                 or die_error(404, "Blob diff not found");
5560
5561                 } elsif (defined $hash &&
5562                          $hash =~ /[0-9a-fA-F]{40}/) {
5563                         # try to find filename from $hash
5564
5565                         # read filtered raw output
5566                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5567                                 $hash_parent_base, $hash_base, "--"
5568                                 or die_error(500, "Open git-diff-tree failed");
5569                         @difftree =
5570                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5571                                 # $hash == to_id
5572                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5573                                 map { chomp; $_ } <$fd>;
5574                         close $fd
5575                                 or die_error(404, "Reading git-diff-tree failed");
5576                         @difftree
5577                                 or die_error(404, "Blob diff not found");
5578
5579                 } else {
5580                         die_error(400, "Missing one of the blob diff parameters");
5581                 }
5582
5583                 if (@difftree > 1) {
5584                         die_error(400, "Ambiguous blob diff specification");
5585                 }
5586
5587                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5588                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5589                 $file_name   ||= $diffinfo{'to_file'};
5590
5591                 $hash_parent ||= $diffinfo{'from_id'};
5592                 $hash        ||= $diffinfo{'to_id'};
5593
5594                 # non-textual hash id's can be cached
5595                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5596                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5597                         $expires = '+1d';
5598                 }
5599
5600                 # open patch output
5601                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5602                         '-p', ($format eq 'html' ? "--full-index" : ()),
5603                         $hash_parent_base, $hash_base,
5604                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5605                         or die_error(500, "Open git-diff-tree failed");
5606         }
5607
5608         # old/legacy style URI -- not generated anymore since 1.4.3.
5609         if (!%diffinfo) {
5610                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5611         }
5612
5613         # header
5614         if ($format eq 'html') {
5615                 my $formats_nav =
5616                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5617                                 "raw");
5618                 git_header_html(undef, $expires);
5619                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5620                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5621                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5622                 } else {
5623                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5624                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5625                 }
5626                 if (defined $file_name) {
5627                         git_print_page_path($file_name, "blob", $hash_base);
5628                 } else {
5629                         print "<div class=\"page_path\"></div>\n";
5630                 }
5631
5632         } elsif ($format eq 'plain') {
5633                 print $cgi->header(
5634                         -type => 'text/plain',
5635                         -charset => 'utf-8',
5636                         -expires => $expires,
5637                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5638
5639                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5640
5641         } else {
5642                 die_error(400, "Unknown blobdiff format");
5643         }
5644
5645         # patch
5646         if ($format eq 'html') {
5647                 print "<div class=\"page_body\">\n";
5648
5649                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5650                 close $fd;
5651
5652                 print "</div>\n"; # class="page_body"
5653                 git_footer_html();
5654
5655         } else {
5656                 while (my $line = <$fd>) {
5657                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5658                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5659
5660                         print $line;
5661
5662                         last if $line =~ m!^\+\+\+!;
5663                 }
5664                 local $/ = undef;
5665                 print <$fd>;
5666                 close $fd;
5667         }
5668 }
5669
5670 sub git_blobdiff_plain {
5671         git_blobdiff('plain');
5672 }
5673
5674 sub git_commitdiff {
5675         my %params = @_;
5676         my $format = $params{-format} || 'html';
5677
5678         my ($patch_max) = gitweb_get_feature('patches');
5679         if ($format eq 'patch') {
5680                 die_error(403, "Patch view not allowed") unless $patch_max;
5681         }
5682
5683         $hash ||= $hash_base || "HEAD";
5684         my %co = parse_commit($hash)
5685             or die_error(404, "Unknown commit object");
5686
5687         # choose format for commitdiff for merge
5688         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5689                 $hash_parent = '--cc';
5690         }
5691         # we need to prepare $formats_nav before almost any parameter munging
5692         my $formats_nav;
5693         if ($format eq 'html') {
5694                 $formats_nav =
5695                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5696                                 "raw");
5697                 if ($patch_max && @{$co{'parents'}} <= 1) {
5698                         $formats_nav .= " | " .
5699                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5700                                         "patch");
5701                 }
5702
5703                 if (defined $hash_parent &&
5704                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5705                         # commitdiff with two commits given
5706                         my $hash_parent_short = $hash_parent;
5707                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5708                                 $hash_parent_short = substr($hash_parent, 0, 7);
5709                         }
5710                         $formats_nav .=
5711                                 ' (from';
5712                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5713                                 if ($co{'parents'}[$i] eq $hash_parent) {
5714                                         $formats_nav .= ' parent ' . ($i+1);
5715                                         last;
5716                                 }
5717                         }
5718                         $formats_nav .= ': ' .
5719                                 $cgi->a({-href => href(action=>"commitdiff",
5720                                                        hash=>$hash_parent)},
5721                                         esc_html($hash_parent_short)) .
5722                                 ')';
5723                 } elsif (!$co{'parent'}) {
5724                         # --root commitdiff
5725                         $formats_nav .= ' (initial)';
5726                 } elsif (scalar @{$co{'parents'}} == 1) {
5727                         # single parent commit
5728                         $formats_nav .=
5729                                 ' (parent: ' .
5730                                 $cgi->a({-href => href(action=>"commitdiff",
5731                                                        hash=>$co{'parent'})},
5732                                         esc_html(substr($co{'parent'}, 0, 7))) .
5733                                 ')';
5734                 } else {
5735                         # merge commit
5736                         if ($hash_parent eq '--cc') {
5737                                 $formats_nav .= ' | ' .
5738                                         $cgi->a({-href => href(action=>"commitdiff",
5739                                                                hash=>$hash, hash_parent=>'-c')},
5740                                                 'combined');
5741                         } else { # $hash_parent eq '-c'
5742                                 $formats_nav .= ' | ' .
5743                                         $cgi->a({-href => href(action=>"commitdiff",
5744                                                                hash=>$hash, hash_parent=>'--cc')},
5745                                                 'compact');
5746                         }
5747                         $formats_nav .=
5748                                 ' (merge: ' .
5749                                 join(' ', map {
5750                                         $cgi->a({-href => href(action=>"commitdiff",
5751                                                                hash=>$_)},
5752                                                 esc_html(substr($_, 0, 7)));
5753                                 } @{$co{'parents'}} ) .
5754                                 ')';
5755                 }
5756         }
5757
5758         my $hash_parent_param = $hash_parent;
5759         if (!defined $hash_parent_param) {
5760                 # --cc for multiple parents, --root for parentless
5761                 $hash_parent_param =
5762                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5763         }
5764
5765         # read commitdiff
5766         my $fd;
5767         my @difftree;
5768         if ($format eq 'html') {
5769                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5770                         "--no-commit-id", "--patch-with-raw", "--full-index",
5771                         $hash_parent_param, $hash, "--"
5772                         or die_error(500, "Open git-diff-tree failed");
5773
5774                 while (my $line = <$fd>) {
5775                         chomp $line;
5776                         # empty line ends raw part of diff-tree output
5777                         last unless $line;
5778                         push @difftree, scalar parse_difftree_raw_line($line);
5779                 }
5780
5781         } elsif ($format eq 'plain') {
5782                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5783                         '-p', $hash_parent_param, $hash, "--"
5784                         or die_error(500, "Open git-diff-tree failed");
5785         } elsif ($format eq 'patch') {
5786                 # For commit ranges, we limit the output to the number of
5787                 # patches specified in the 'patches' feature.
5788                 # For single commits, we limit the output to a single patch,
5789                 # diverging from the git-format-patch default.
5790                 my @commit_spec = ();
5791                 if ($hash_parent) {
5792                         if ($patch_max > 0) {
5793                                 push @commit_spec, "-$patch_max";
5794                         }
5795                         push @commit_spec, '-n', "$hash_parent..$hash";
5796                 } else {
5797                         if ($params{-single}) {
5798                                 push @commit_spec, '-1';
5799                         } else {
5800                                 if ($patch_max > 0) {
5801                                         push @commit_spec, "-$patch_max";
5802                                 }
5803                                 push @commit_spec, "-n";
5804                         }
5805                         push @commit_spec, '--root', $hash;
5806                 }
5807                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5808                         '--stdout', @commit_spec
5809                         or die_error(500, "Open git-format-patch failed");
5810         } else {
5811                 die_error(400, "Unknown commitdiff format");
5812         }
5813
5814         # non-textual hash id's can be cached
5815         my $expires;
5816         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5817                 $expires = "+1d";
5818         }
5819
5820         # write commit message
5821         if ($format eq 'html') {
5822                 my $refs = git_get_references();
5823                 my $ref = format_ref_marker($refs, $co{'id'});
5824
5825                 git_header_html(undef, $expires);
5826                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5827                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5828                 print "<div class=\"title_text\">\n" .
5829                       "<table class=\"object_header\">\n";
5830                 git_print_authorship_rows(\%co);
5831                 print "</table>".
5832                       "</div>\n";
5833                 print "<div class=\"page_body\">\n";
5834                 if (@{$co{'comment'}} > 1) {
5835                         print "<div class=\"log\">\n";
5836                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5837                         print "</div>\n"; # class="log"
5838                 }
5839
5840         } elsif ($format eq 'plain') {
5841                 my $refs = git_get_references("tags");
5842                 my $tagname = git_get_rev_name_tags($hash);
5843                 my $filename = basename($project) . "-$hash.patch";
5844
5845                 print $cgi->header(
5846                         -type => 'text/plain',
5847                         -charset => 'utf-8',
5848                         -expires => $expires,
5849                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5850                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5851                 print "From: " . to_utf8($co{'author'}) . "\n";
5852                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5853                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5854
5855                 print "X-Git-Tag: $tagname\n" if $tagname;
5856                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5857
5858                 foreach my $line (@{$co{'comment'}}) {
5859                         print to_utf8($line) . "\n";
5860                 }
5861                 print "---\n\n";
5862         } elsif ($format eq 'patch') {
5863                 my $filename = basename($project) . "-$hash.patch";
5864
5865                 print $cgi->header(
5866                         -type => 'text/plain',
5867                         -charset => 'utf-8',
5868                         -expires => $expires,
5869                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5870         }
5871
5872         # write patch
5873         if ($format eq 'html') {
5874                 my $use_parents = !defined $hash_parent ||
5875                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5876                 git_difftree_body(\@difftree, $hash,
5877                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5878                 print "<br/>\n";
5879
5880                 git_patchset_body($fd, \@difftree, $hash,
5881                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5882                 close $fd;
5883                 print "</div>\n"; # class="page_body"
5884                 git_footer_html();
5885
5886         } elsif ($format eq 'plain') {
5887                 local $/ = undef;
5888                 print <$fd>;
5889                 close $fd
5890                         or print "Reading git-diff-tree failed\n";
5891         } elsif ($format eq 'patch') {
5892                 local $/ = undef;
5893                 print <$fd>;
5894                 close $fd
5895                         or print "Reading git-format-patch failed\n";
5896         }
5897 }
5898
5899 sub git_commitdiff_plain {
5900         git_commitdiff(-format => 'plain');
5901 }
5902
5903 # format-patch-style patches
5904 sub git_patch {
5905         git_commitdiff(-format => 'patch', -single => 1);
5906 }
5907
5908 sub git_patches {
5909         git_commitdiff(-format => 'patch');
5910 }
5911
5912 sub git_history {
5913         if (!defined $hash_base) {
5914                 $hash_base = git_get_head_hash($project);
5915         }
5916         if (!defined $page) {
5917                 $page = 0;
5918         }
5919         my $ftype;
5920         my %co = parse_commit($hash_base)
5921             or die_error(404, "Unknown commit object");
5922
5923         my $refs = git_get_references();
5924         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5925
5926         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5927                                        $file_name, "--full-history")
5928             or die_error(404, "No such file or directory on given branch");
5929
5930         if (!defined $hash && defined $file_name) {
5931                 # some commits could have deleted file in question,
5932                 # and not have it in tree, but one of them has to have it
5933                 for (my $i = 0; $i <= @commitlist; $i++) {
5934                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5935                         last if defined $hash;
5936                 }
5937         }
5938         if (defined $hash) {
5939                 $ftype = git_get_type($hash);
5940         }
5941         if (!defined $ftype) {
5942                 die_error(500, "Unknown type of object");
5943         }
5944
5945         my $paging_nav = '';
5946         if ($page > 0) {
5947                 $paging_nav .=
5948                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5949                                                file_name=>$file_name)},
5950                                 "first");
5951                 $paging_nav .= " &sdot; " .
5952                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5953                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5954         } else {
5955                 $paging_nav .= "first";
5956                 $paging_nav .= " &sdot; prev";
5957         }
5958         my $next_link = '';
5959         if ($#commitlist >= 100) {
5960                 $next_link =
5961                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5962                                  -accesskey => "n", -title => "Alt-n"}, "next");
5963                 $paging_nav .= " &sdot; $next_link";
5964         } else {
5965                 $paging_nav .= " &sdot; next";
5966         }
5967
5968         git_header_html();
5969         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5970         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5971         git_print_page_path($file_name, $ftype, $hash_base);
5972
5973         git_history_body(\@commitlist, 0, 99,
5974                          $refs, $hash_base, $ftype, $next_link);
5975
5976         git_footer_html();
5977 }
5978
5979 sub git_search {
5980         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5981         if (!defined $searchtext) {
5982                 die_error(400, "Text field is empty");
5983         }
5984         if (!defined $hash) {
5985                 $hash = git_get_head_hash($project);
5986         }
5987         my %co = parse_commit($hash);
5988         if (!%co) {
5989                 die_error(404, "Unknown commit object");
5990         }
5991         if (!defined $page) {
5992                 $page = 0;
5993         }
5994
5995         $searchtype ||= 'commit';
5996         if ($searchtype eq 'pickaxe') {
5997                 # pickaxe may take all resources of your box and run for several minutes
5998                 # with every query - so decide by yourself how public you make this feature
5999                 gitweb_check_feature('pickaxe')
6000                     or die_error(403, "Pickaxe is disabled");
6001         }
6002         if ($searchtype eq 'grep') {
6003                 gitweb_check_feature('grep')
6004                     or die_error(403, "Grep is disabled");
6005         }
6006
6007         git_header_html();
6008
6009         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6010                 my $greptype;
6011                 if ($searchtype eq 'commit') {
6012                         $greptype = "--grep=";
6013                 } elsif ($searchtype eq 'author') {
6014                         $greptype = "--author=";
6015                 } elsif ($searchtype eq 'committer') {
6016                         $greptype = "--committer=";
6017                 }
6018                 $greptype .= $searchtext;
6019                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6020                                                $greptype, '--regexp-ignore-case',
6021                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6022
6023                 my $paging_nav = '';
6024                 if ($page > 0) {
6025                         $paging_nav .=
6026                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6027                                                        searchtext=>$searchtext,
6028                                                        searchtype=>$searchtype)},
6029                                         "first");
6030                         $paging_nav .= " &sdot; " .
6031                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6032                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6033                 } else {
6034                         $paging_nav .= "first";
6035                         $paging_nav .= " &sdot; prev";
6036                 }
6037                 my $next_link = '';
6038                 if ($#commitlist >= 100) {
6039                         $next_link =
6040                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6041                                          -accesskey => "n", -title => "Alt-n"}, "next");
6042                         $paging_nav .= " &sdot; $next_link";
6043                 } else {
6044                         $paging_nav .= " &sdot; next";
6045                 }
6046
6047                 if ($#commitlist >= 100) {
6048                 }
6049
6050                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6051                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6052                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6053         }
6054
6055         if ($searchtype eq 'pickaxe') {
6056                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6057                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6058
6059                 print "<table class=\"pickaxe search\">\n";
6060                 my $alternate = 1;
6061                 local $/ = "\n";
6062                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6063                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6064                         ($search_use_regexp ? '--pickaxe-regex' : ());
6065                 undef %co;
6066                 my @files;
6067                 while (my $line = <$fd>) {
6068                         chomp $line;
6069                         next unless $line;
6070
6071                         my %set = parse_difftree_raw_line($line);
6072                         if (defined $set{'commit'}) {
6073                                 # finish previous commit
6074                                 if (%co) {
6075                                         print "</td>\n" .
6076                                               "<td class=\"link\">" .
6077                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6078                                               " | " .
6079                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6080                                         print "</td>\n" .
6081                                               "</tr>\n";
6082                                 }
6083
6084                                 if ($alternate) {
6085                                         print "<tr class=\"dark\">\n";
6086                                 } else {
6087                                         print "<tr class=\"light\">\n";
6088                                 }
6089                                 $alternate ^= 1;
6090                                 %co = parse_commit($set{'commit'});
6091                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6092                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6093                                       "<td><i>$author</i></td>\n" .
6094                                       "<td>" .
6095                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6096                                               -class => "list subject"},
6097                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6098                         } elsif (defined $set{'to_id'}) {
6099                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6100
6101                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6102                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6103                                               -class => "list"},
6104                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6105                                       "<br/>\n";
6106                         }
6107                 }
6108                 close $fd;
6109
6110                 # finish last commit (warning: repetition!)
6111                 if (%co) {
6112                         print "</td>\n" .
6113                               "<td class=\"link\">" .
6114                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6115                               " | " .
6116                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6117                         print "</td>\n" .
6118                               "</tr>\n";
6119                 }
6120
6121                 print "</table>\n";
6122         }
6123
6124         if ($searchtype eq 'grep') {
6125                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6126                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6127
6128                 print "<table class=\"grep_search\">\n";
6129                 my $alternate = 1;
6130                 my $matches = 0;
6131                 local $/ = "\n";
6132                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6133                         $search_use_regexp ? ('-E', '-i') : '-F',
6134                         $searchtext, $co{'tree'};
6135                 my $lastfile = '';
6136                 while (my $line = <$fd>) {
6137                         chomp $line;
6138                         my ($file, $lno, $ltext, $binary);
6139                         last if ($matches++ > 1000);
6140                         if ($line =~ /^Binary file (.+) matches$/) {
6141                                 $file = $1;
6142                                 $binary = 1;
6143                         } else {
6144                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6145                         }
6146                         if ($file ne $lastfile) {
6147                                 $lastfile and print "</td></tr>\n";
6148                                 if ($alternate++) {
6149                                         print "<tr class=\"dark\">\n";
6150                                 } else {
6151                                         print "<tr class=\"light\">\n";
6152                                 }
6153                                 print "<td class=\"list\">".
6154                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6155                                                                file_name=>"$file"),
6156                                                 -class => "list"}, esc_path($file));
6157                                 print "</td><td>\n";
6158                                 $lastfile = $file;
6159                         }
6160                         if ($binary) {
6161                                 print "<div class=\"binary\">Binary file</div>\n";
6162                         } else {
6163                                 $ltext = untabify($ltext);
6164                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6165                                         $ltext = esc_html($1, -nbsp=>1);
6166                                         $ltext .= '<span class="match">';
6167                                         $ltext .= esc_html($2, -nbsp=>1);
6168                                         $ltext .= '</span>';
6169                                         $ltext .= esc_html($3, -nbsp=>1);
6170                                 } else {
6171                                         $ltext = esc_html($ltext, -nbsp=>1);
6172                                 }
6173                                 print "<div class=\"pre\">" .
6174                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6175                                                                file_name=>"$file").'#l'.$lno,
6176                                                 -class => "linenr"}, sprintf('%4i', $lno))
6177                                         . ' ' .  $ltext . "</div>\n";
6178                         }
6179                 }
6180                 if ($lastfile) {
6181                         print "</td></tr>\n";
6182                         if ($matches > 1000) {
6183                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6184                         }
6185                 } else {
6186                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6187                 }
6188                 close $fd;
6189
6190                 print "</table>\n";
6191         }
6192         git_footer_html();
6193 }
6194
6195 sub git_search_help {
6196         git_header_html();
6197         git_print_page_nav('','', $hash,$hash,$hash);
6198         print <<EOT;
6199 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6200 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6201 the pattern entered is recognized as the POSIX extended
6202 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6203 insensitive).</p>
6204 <dl>
6205 <dt><b>commit</b></dt>
6206 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6207 EOT
6208         my $have_grep = gitweb_check_feature('grep');
6209         if ($have_grep) {
6210                 print <<EOT;
6211 <dt><b>grep</b></dt>
6212 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6213     a different one) are searched for the given pattern. On large trees, this search can take
6214 a while and put some strain on the server, so please use it with some consideration. Note that
6215 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6216 case-sensitive.</dd>
6217 EOT
6218         }
6219         print <<EOT;
6220 <dt><b>author</b></dt>
6221 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6222 <dt><b>committer</b></dt>
6223 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6224 EOT
6225         my $have_pickaxe = gitweb_check_feature('pickaxe');
6226         if ($have_pickaxe) {
6227                 print <<EOT;
6228 <dt><b>pickaxe</b></dt>
6229 <dd>All commits that caused the string to appear or disappear from any file (changes that
6230 added, removed or "modified" the string) will be listed. This search can take a while and
6231 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6232 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6233 EOT
6234         }
6235         print "</dl>\n";
6236         git_footer_html();
6237 }
6238
6239 sub git_shortlog {
6240         my $head = git_get_head_hash($project);
6241         if (!defined $hash) {
6242                 $hash = $head;
6243         }
6244         if (!defined $page) {
6245                 $page = 0;
6246         }
6247         my $refs = git_get_references();
6248
6249         my $commit_hash = $hash;
6250         if (defined $hash_parent) {
6251                 $commit_hash = "$hash_parent..$hash";
6252         }
6253         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6254
6255         my $paging_nav = format_log_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6256
6257         my $next_link = '';
6258         if ($#commitlist >= 100) {
6259                 $next_link =
6260                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6261                                  -accesskey => "n", -title => "Alt-n"}, "next");
6262         }
6263         my $patch_max = gitweb_check_feature('patches');
6264         if ($patch_max) {
6265                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6266                         $paging_nav .= " &sdot; " .
6267                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6268                                         "patches");
6269                 }
6270         }
6271
6272         git_header_html();
6273         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6274         git_print_header_div('summary', $project);
6275
6276         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6277
6278         git_footer_html();
6279 }
6280
6281 ## ......................................................................
6282 ## feeds (RSS, Atom; OPML)
6283
6284 sub git_feed {
6285         my $format = shift || 'atom';
6286         my $have_blame = gitweb_check_feature('blame');
6287
6288         # Atom: http://www.atomenabled.org/developers/syndication/
6289         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6290         if ($format ne 'rss' && $format ne 'atom') {
6291                 die_error(400, "Unknown web feed format");
6292         }
6293
6294         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6295         my $head = $hash || 'HEAD';
6296         my @commitlist = parse_commits($head, 150, 0, $file_name);
6297
6298         my %latest_commit;
6299         my %latest_date;
6300         my $content_type = "application/$format+xml";
6301         if (defined $cgi->http('HTTP_ACCEPT') &&
6302                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6303                 # browser (feed reader) prefers text/xml
6304                 $content_type = 'text/xml';
6305         }
6306         if (defined($commitlist[0])) {
6307                 %latest_commit = %{$commitlist[0]};
6308                 my $latest_epoch = $latest_commit{'committer_epoch'};
6309                 %latest_date   = parse_date($latest_epoch);
6310                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6311                 if (defined $if_modified) {
6312                         my $since;
6313                         if (eval { require HTTP::Date; 1; }) {
6314                                 $since = HTTP::Date::str2time($if_modified);
6315                         } elsif (eval { require Time::ParseDate; 1; }) {
6316                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6317                         }
6318                         if (defined $since && $latest_epoch <= $since) {
6319                                 print $cgi->header(
6320                                         -type => $content_type,
6321                                         -charset => 'utf-8',
6322                                         -last_modified => $latest_date{'rfc2822'},
6323                                         -status => '304 Not Modified');
6324                                 return;
6325                         }
6326                 }
6327                 print $cgi->header(
6328                         -type => $content_type,
6329                         -charset => 'utf-8',
6330                         -last_modified => $latest_date{'rfc2822'});
6331         } else {
6332                 print $cgi->header(
6333                         -type => $content_type,
6334                         -charset => 'utf-8');
6335         }
6336
6337         # Optimization: skip generating the body if client asks only
6338         # for Last-Modified date.
6339         return if ($cgi->request_method() eq 'HEAD');
6340
6341         # header variables
6342         my $title = "$site_name - $project/$action";
6343         my $feed_type = 'log';
6344         if (defined $hash) {
6345                 $title .= " - '$hash'";
6346                 $feed_type = 'branch log';
6347                 if (defined $file_name) {
6348                         $title .= " :: $file_name";
6349                         $feed_type = 'history';
6350                 }
6351         } elsif (defined $file_name) {
6352                 $title .= " - $file_name";
6353                 $feed_type = 'history';
6354         }
6355         $title .= " $feed_type";
6356         my $descr = git_get_project_description($project);
6357         if (defined $descr) {
6358                 $descr = esc_html($descr);
6359         } else {
6360                 $descr = "$project " .
6361                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6362                          " feed";
6363         }
6364         my $owner = git_get_project_owner($project);
6365         $owner = esc_html($owner);
6366
6367         #header
6368         my $alt_url;
6369         if (defined $file_name) {
6370                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6371         } elsif (defined $hash) {
6372                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6373         } else {
6374                 $alt_url = href(-full=>1, action=>"summary");
6375         }
6376         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6377         if ($format eq 'rss') {
6378                 print <<XML;
6379 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6380 <channel>
6381 XML
6382                 print "<title>$title</title>\n" .
6383                       "<link>$alt_url</link>\n" .
6384                       "<description>$descr</description>\n" .
6385                       "<language>en</language>\n" .
6386                       # project owner is responsible for 'editorial' content
6387                       "<managingEditor>$owner</managingEditor>\n";
6388                 if (defined $logo || defined $favicon) {
6389                         # prefer the logo to the favicon, since RSS
6390                         # doesn't allow both
6391                         my $img = esc_url($logo || $favicon);
6392                         print "<image>\n" .
6393                               "<url>$img</url>\n" .
6394                               "<title>$title</title>\n" .
6395                               "<link>$alt_url</link>\n" .
6396                               "</image>\n";
6397                 }
6398                 if (%latest_date) {
6399                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6400                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6401                 }
6402                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6403         } elsif ($format eq 'atom') {
6404                 print <<XML;
6405 <feed xmlns="http://www.w3.org/2005/Atom">
6406 XML
6407                 print "<title>$title</title>\n" .
6408                       "<subtitle>$descr</subtitle>\n" .
6409                       '<link rel="alternate" type="text/html" href="' .
6410                       $alt_url . '" />' . "\n" .
6411                       '<link rel="self" type="' . $content_type . '" href="' .
6412                       $cgi->self_url() . '" />' . "\n" .
6413                       "<id>" . href(-full=>1) . "</id>\n" .
6414                       # use project owner for feed author
6415                       "<author><name>$owner</name></author>\n";
6416                 if (defined $favicon) {
6417                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6418                 }
6419                 if (defined $logo_url) {
6420                         # not twice as wide as tall: 72 x 27 pixels
6421                         print "<logo>" . esc_url($logo) . "</logo>\n";
6422                 }
6423                 if (! %latest_date) {
6424                         # dummy date to keep the feed valid until commits trickle in:
6425                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6426                 } else {
6427                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6428                 }
6429                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6430         }
6431
6432         # contents
6433         for (my $i = 0; $i <= $#commitlist; $i++) {
6434                 my %co = %{$commitlist[$i]};
6435                 my $commit = $co{'id'};
6436                 # we read 150, we always show 30 and the ones more recent than 48 hours
6437                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6438                         last;
6439                 }
6440                 my %cd = parse_date($co{'author_epoch'});
6441
6442                 # get list of changed files
6443                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6444                         $co{'parent'} || "--root",
6445                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6446                         or next;
6447                 my @difftree = map { chomp; $_ } <$fd>;
6448                 close $fd
6449                         or next;
6450
6451                 # print element (entry, item)
6452                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6453                 if ($format eq 'rss') {
6454                         print "<item>\n" .
6455                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6456                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6457                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6458                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6459                               "<link>$co_url</link>\n" .
6460                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6461                               "<content:encoded>" .
6462                               "<![CDATA[\n";
6463                 } elsif ($format eq 'atom') {
6464                         print "<entry>\n" .
6465                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6466                               "<updated>$cd{'iso-8601'}</updated>\n" .
6467                               "<author>\n" .
6468                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6469                         if ($co{'author_email'}) {
6470                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6471                         }
6472                         print "</author>\n" .
6473                               # use committer for contributor
6474                               "<contributor>\n" .
6475                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6476                         if ($co{'committer_email'}) {
6477                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6478                         }
6479                         print "</contributor>\n" .
6480                               "<published>$cd{'iso-8601'}</published>\n" .
6481                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6482                               "<id>$co_url</id>\n" .
6483                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6484                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6485                 }
6486                 my $comment = $co{'comment'};
6487                 print "<pre>\n";
6488                 foreach my $line (@$comment) {
6489                         $line = esc_html($line);
6490                         print "$line\n";
6491                 }
6492                 print "</pre><ul>\n";
6493                 foreach my $difftree_line (@difftree) {
6494                         my %difftree = parse_difftree_raw_line($difftree_line);
6495                         next if !$difftree{'from_id'};
6496
6497                         my $file = $difftree{'file'} || $difftree{'to_file'};
6498
6499                         print "<li>" .
6500                               "[" .
6501                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6502                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6503                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6504                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6505                                       -title => "diff"}, 'D');
6506                         if ($have_blame) {
6507                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6508                                                              file_name=>$file, hash_base=>$commit),
6509                                               -title => "blame"}, 'B');
6510                         }
6511                         # if this is not a feed of a file history
6512                         if (!defined $file_name || $file_name ne $file) {
6513                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6514                                                              file_name=>$file, hash=>$commit),
6515                                               -title => "history"}, 'H');
6516                         }
6517                         $file = esc_path($file);
6518                         print "] ".
6519                               "$file</li>\n";
6520                 }
6521                 if ($format eq 'rss') {
6522                         print "</ul>]]>\n" .
6523                               "</content:encoded>\n" .
6524                               "</item>\n";
6525                 } elsif ($format eq 'atom') {
6526                         print "</ul>\n</div>\n" .
6527                               "</content>\n" .
6528                               "</entry>\n";
6529                 }
6530         }
6531
6532         # end of feed
6533         if ($format eq 'rss') {
6534                 print "</channel>\n</rss>\n";
6535         } elsif ($format eq 'atom') {
6536                 print "</feed>\n";
6537         }
6538 }
6539
6540 sub git_rss {
6541         git_feed('rss');
6542 }
6543
6544 sub git_atom {
6545         git_feed('atom');
6546 }
6547
6548 sub git_opml {
6549         my @list = git_get_projects_list();
6550
6551         print $cgi->header(
6552                 -type => 'text/xml',
6553                 -charset => 'utf-8',
6554                 -content_disposition => 'inline; filename="opml.xml"');
6555
6556         print <<XML;
6557 <?xml version="1.0" encoding="utf-8"?>
6558 <opml version="1.0">
6559 <head>
6560   <title>$site_name OPML Export</title>
6561 </head>
6562 <body>
6563 <outline text="git RSS feeds">
6564 XML
6565
6566         foreach my $pr (@list) {
6567                 my %proj = %$pr;
6568                 my $head = git_get_head_hash($proj{'path'});
6569                 if (!defined $head) {
6570                         next;
6571                 }
6572                 $git_dir = "$projectroot/$proj{'path'}";
6573                 my %co = parse_commit($head);
6574                 if (!%co) {
6575                         next;
6576                 }
6577
6578                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6579                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6580                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6581                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6582         }
6583         print <<XML;
6584 </outline>
6585 </body>
6586 </opml>
6587 XML
6588 }