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 # format the author name of the given commit with the given tag
1611 # the author name is chopped and escaped according to the other
1612 # optional parameters (see chop_str).
1613 sub format_author_html {
1614         my $tag = shift;
1615         my $co = shift;
1616         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1617         return "<$tag class=\"author\">" .
1618                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1619                $author . "</$tag>";
1620 }
1621
1622 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1623 sub format_git_diff_header_line {
1624         my $line = shift;
1625         my $diffinfo = shift;
1626         my ($from, $to) = @_;
1627
1628         if ($diffinfo->{'nparents'}) {
1629                 # combined diff
1630                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1631                 if ($to->{'href'}) {
1632                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1633                                          esc_path($to->{'file'}));
1634                 } else { # file was deleted (no href)
1635                         $line .= esc_path($to->{'file'});
1636                 }
1637         } else {
1638                 # "ordinary" diff
1639                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1640                 if ($from->{'href'}) {
1641                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1642                                          'a/' . esc_path($from->{'file'}));
1643                 } else { # file was added (no href)
1644                         $line .= 'a/' . esc_path($from->{'file'});
1645                 }
1646                 $line .= ' ';
1647                 if ($to->{'href'}) {
1648                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1649                                          'b/' . esc_path($to->{'file'}));
1650                 } else { # file was deleted
1651                         $line .= 'b/' . esc_path($to->{'file'});
1652                 }
1653         }
1654
1655         return "<div class=\"diff header\">$line</div>\n";
1656 }
1657
1658 # format extended diff header line, before patch itself
1659 sub format_extended_diff_header_line {
1660         my $line = shift;
1661         my $diffinfo = shift;
1662         my ($from, $to) = @_;
1663
1664         # match <path>
1665         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1666                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1667                                        esc_path($from->{'file'}));
1668         }
1669         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1670                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1671                                  esc_path($to->{'file'}));
1672         }
1673         # match single <mode>
1674         if ($line =~ m/\s(\d{6})$/) {
1675                 $line .= '<span class="info"> (' .
1676                          file_type_long($1) .
1677                          ')</span>';
1678         }
1679         # match <hash>
1680         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1681                 # can match only for combined diff
1682                 $line = 'index ';
1683                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1684                         if ($from->{'href'}[$i]) {
1685                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1686                                                   -class=>"hash"},
1687                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1688                         } else {
1689                                 $line .= '0' x 7;
1690                         }
1691                         # separator
1692                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1693                 }
1694                 $line .= '..';
1695                 if ($to->{'href'}) {
1696                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1697                                          substr($diffinfo->{'to_id'},0,7));
1698                 } else {
1699                         $line .= '0' x 7;
1700                 }
1701
1702         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1703                 # can match only for ordinary diff
1704                 my ($from_link, $to_link);
1705                 if ($from->{'href'}) {
1706                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1707                                              substr($diffinfo->{'from_id'},0,7));
1708                 } else {
1709                         $from_link = '0' x 7;
1710                 }
1711                 if ($to->{'href'}) {
1712                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1713                                            substr($diffinfo->{'to_id'},0,7));
1714                 } else {
1715                         $to_link = '0' x 7;
1716                 }
1717                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1718                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1719         }
1720
1721         return $line . "<br/>\n";
1722 }
1723
1724 # format from-file/to-file diff header
1725 sub format_diff_from_to_header {
1726         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1727         my $line;
1728         my $result = '';
1729
1730         $line = $from_line;
1731         #assert($line =~ m/^---/) if DEBUG;
1732         # no extra formatting for "^--- /dev/null"
1733         if (! $diffinfo->{'nparents'}) {
1734                 # ordinary (single parent) diff
1735                 if ($line =~ m!^--- "?a/!) {
1736                         if ($from->{'href'}) {
1737                                 $line = '--- a/' .
1738                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1739                                                 esc_path($from->{'file'}));
1740                         } else {
1741                                 $line = '--- a/' .
1742                                         esc_path($from->{'file'});
1743                         }
1744                 }
1745                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1746
1747         } else {
1748                 # combined diff (merge commit)
1749                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1750                         if ($from->{'href'}[$i]) {
1751                                 $line = '--- ' .
1752                                         $cgi->a({-href=>href(action=>"blobdiff",
1753                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1754                                                              hash_parent_base=>$parents[$i],
1755                                                              file_parent=>$from->{'file'}[$i],
1756                                                              hash=>$diffinfo->{'to_id'},
1757                                                              hash_base=>$hash,
1758                                                              file_name=>$to->{'file'}),
1759                                                  -class=>"path",
1760                                                  -title=>"diff" . ($i+1)},
1761                                                 $i+1) .
1762                                         '/' .
1763                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1764                                                 esc_path($from->{'file'}[$i]));
1765                         } else {
1766                                 $line = '--- /dev/null';
1767                         }
1768                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1769                 }
1770         }
1771
1772         $line = $to_line;
1773         #assert($line =~ m/^\+\+\+/) if DEBUG;
1774         # no extra formatting for "^+++ /dev/null"
1775         if ($line =~ m!^\+\+\+ "?b/!) {
1776                 if ($to->{'href'}) {
1777                         $line = '+++ b/' .
1778                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1779                                         esc_path($to->{'file'}));
1780                 } else {
1781                         $line = '+++ b/' .
1782                                 esc_path($to->{'file'});
1783                 }
1784         }
1785         $result .= qq!<div class="diff to_file">$line</div>\n!;
1786
1787         return $result;
1788 }
1789
1790 # create note for patch simplified by combined diff
1791 sub format_diff_cc_simplified {
1792         my ($diffinfo, @parents) = @_;
1793         my $result = '';
1794
1795         $result .= "<div class=\"diff header\">" .
1796                    "diff --cc ";
1797         if (!is_deleted($diffinfo)) {
1798                 $result .= $cgi->a({-href => href(action=>"blob",
1799                                                   hash_base=>$hash,
1800                                                   hash=>$diffinfo->{'to_id'},
1801                                                   file_name=>$diffinfo->{'to_file'}),
1802                                     -class => "path"},
1803                                    esc_path($diffinfo->{'to_file'}));
1804         } else {
1805                 $result .= esc_path($diffinfo->{'to_file'});
1806         }
1807         $result .= "</div>\n" . # class="diff header"
1808                    "<div class=\"diff nodifferences\">" .
1809                    "Simple merge" .
1810                    "</div>\n"; # class="diff nodifferences"
1811
1812         return $result;
1813 }
1814
1815 # format patch (diff) line (not to be used for diff headers)
1816 sub format_diff_line {
1817         my $line = shift;
1818         my ($from, $to) = @_;
1819         my $diff_class = "";
1820
1821         chomp $line;
1822
1823         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1824                 # combined diff
1825                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1826                 if ($line =~ m/^\@{3}/) {
1827                         $diff_class = " chunk_header";
1828                 } elsif ($line =~ m/^\\/) {
1829                         $diff_class = " incomplete";
1830                 } elsif ($prefix =~ tr/+/+/) {
1831                         $diff_class = " add";
1832                 } elsif ($prefix =~ tr/-/-/) {
1833                         $diff_class = " rem";
1834                 }
1835         } else {
1836                 # assume ordinary diff
1837                 my $char = substr($line, 0, 1);
1838                 if ($char eq '+') {
1839                         $diff_class = " add";
1840                 } elsif ($char eq '-') {
1841                         $diff_class = " rem";
1842                 } elsif ($char eq '@') {
1843                         $diff_class = " chunk_header";
1844                 } elsif ($char eq "\\") {
1845                         $diff_class = " incomplete";
1846                 }
1847         }
1848         $line = untabify($line);
1849         if ($from && $to && $line =~ m/^\@{2} /) {
1850                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1851                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1852
1853                 $from_lines = 0 unless defined $from_lines;
1854                 $to_lines   = 0 unless defined $to_lines;
1855
1856                 if ($from->{'href'}) {
1857                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1858                                              -class=>"list"}, $from_text);
1859                 }
1860                 if ($to->{'href'}) {
1861                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1862                                              -class=>"list"}, $to_text);
1863                 }
1864                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1865                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1866                 return "<div class=\"diff$diff_class\">$line</div>\n";
1867         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1868                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1869                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1870
1871                 @from_text = split(' ', $ranges);
1872                 for (my $i = 0; $i < @from_text; ++$i) {
1873                         ($from_start[$i], $from_nlines[$i]) =
1874                                 (split(',', substr($from_text[$i], 1)), 0);
1875                 }
1876
1877                 $to_text   = pop @from_text;
1878                 $to_start  = pop @from_start;
1879                 $to_nlines = pop @from_nlines;
1880
1881                 $line = "<span class=\"chunk_info\">$prefix ";
1882                 for (my $i = 0; $i < @from_text; ++$i) {
1883                         if ($from->{'href'}[$i]) {
1884                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1885                                                   -class=>"list"}, $from_text[$i]);
1886                         } else {
1887                                 $line .= $from_text[$i];
1888                         }
1889                         $line .= " ";
1890                 }
1891                 if ($to->{'href'}) {
1892                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1893                                           -class=>"list"}, $to_text);
1894                 } else {
1895                         $line .= $to_text;
1896                 }
1897                 $line .= " $prefix</span>" .
1898                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1899                 return "<div class=\"diff$diff_class\">$line</div>\n";
1900         }
1901         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1902 }
1903
1904 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1905 # linked.  Pass the hash of the tree/commit to snapshot.
1906 sub format_snapshot_links {
1907         my ($hash) = @_;
1908         my $num_fmts = @snapshot_fmts;
1909         if ($num_fmts > 1) {
1910                 # A parenthesized list of links bearing format names.
1911                 # e.g. "snapshot (_tar.gz_ _zip_)"
1912                 return "snapshot (" . join(' ', map
1913                         $cgi->a({
1914                                 -href => href(
1915                                         action=>"snapshot",
1916                                         hash=>$hash,
1917                                         snapshot_format=>$_
1918                                 )
1919                         }, $known_snapshot_formats{$_}{'display'})
1920                 , @snapshot_fmts) . ")";
1921         } elsif ($num_fmts == 1) {
1922                 # A single "snapshot" link whose tooltip bears the format name.
1923                 # i.e. "_snapshot_"
1924                 my ($fmt) = @snapshot_fmts;
1925                 return
1926                         $cgi->a({
1927                                 -href => href(
1928                                         action=>"snapshot",
1929                                         hash=>$hash,
1930                                         snapshot_format=>$fmt
1931                                 ),
1932                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1933                         }, "snapshot");
1934         } else { # $num_fmts == 0
1935                 return undef;
1936         }
1937 }
1938
1939 ## ......................................................................
1940 ## functions returning values to be passed, perhaps after some
1941 ## transformation, to other functions; e.g. returning arguments to href()
1942
1943 # returns hash to be passed to href to generate gitweb URL
1944 # in -title key it returns description of link
1945 sub get_feed_info {
1946         my $format = shift || 'Atom';
1947         my %res = (action => lc($format));
1948
1949         # feed links are possible only for project views
1950         return unless (defined $project);
1951         # some views should link to OPML, or to generic project feed,
1952         # or don't have specific feed yet (so they should use generic)
1953         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1954
1955         my $branch;
1956         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1957         # from tag links; this also makes possible to detect branch links
1958         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1959             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1960                 $branch = $1;
1961         }
1962         # find log type for feed description (title)
1963         my $type = 'log';
1964         if (defined $file_name) {
1965                 $type  = "history of $file_name";
1966                 $type .= "/" if ($action eq 'tree');
1967                 $type .= " on '$branch'" if (defined $branch);
1968         } else {
1969                 $type = "log of $branch" if (defined $branch);
1970         }
1971
1972         $res{-title} = $type;
1973         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1974         $res{'file_name'} = $file_name;
1975
1976         return %res;
1977 }
1978
1979 ## ----------------------------------------------------------------------
1980 ## git utility subroutines, invoking git commands
1981
1982 # returns path to the core git executable and the --git-dir parameter as list
1983 sub git_cmd {
1984         return $GIT, '--git-dir='.$git_dir;
1985 }
1986
1987 # quote the given arguments for passing them to the shell
1988 # quote_command("command", "arg 1", "arg with ' and ! characters")
1989 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1990 # Try to avoid using this function wherever possible.
1991 sub quote_command {
1992         return join(' ',
1993                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1994 }
1995
1996 # get HEAD ref of given project as hash
1997 sub git_get_head_hash {
1998         my $project = shift;
1999         my $o_git_dir = $git_dir;
2000         my $retval = undef;
2001         $git_dir = "$projectroot/$project";
2002         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2003                 my $head = <$fd>;
2004                 close $fd;
2005                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2006                         $retval = $1;
2007                 }
2008         }
2009         if (defined $o_git_dir) {
2010                 $git_dir = $o_git_dir;
2011         }
2012         return $retval;
2013 }
2014
2015 # get type of given object
2016 sub git_get_type {
2017         my $hash = shift;
2018
2019         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2020         my $type = <$fd>;
2021         close $fd or return;
2022         chomp $type;
2023         return $type;
2024 }
2025
2026 # repository configuration
2027 our $config_file = '';
2028 our %config;
2029
2030 # store multiple values for single key as anonymous array reference
2031 # single values stored directly in the hash, not as [ <value> ]
2032 sub hash_set_multi {
2033         my ($hash, $key, $value) = @_;
2034
2035         if (!exists $hash->{$key}) {
2036                 $hash->{$key} = $value;
2037         } elsif (!ref $hash->{$key}) {
2038                 $hash->{$key} = [ $hash->{$key}, $value ];
2039         } else {
2040                 push @{$hash->{$key}}, $value;
2041         }
2042 }
2043
2044 # return hash of git project configuration
2045 # optionally limited to some section, e.g. 'gitweb'
2046 sub git_parse_project_config {
2047         my $section_regexp = shift;
2048         my %config;
2049
2050         local $/ = "\0";
2051
2052         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2053                 or return;
2054
2055         while (my $keyval = <$fh>) {
2056                 chomp $keyval;
2057                 my ($key, $value) = split(/\n/, $keyval, 2);
2058
2059                 hash_set_multi(\%config, $key, $value)
2060                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2061         }
2062         close $fh;
2063
2064         return %config;
2065 }
2066
2067 # convert config value to boolean: 'true' or 'false'
2068 # no value, number > 0, 'true' and 'yes' values are true
2069 # rest of values are treated as false (never as error)
2070 sub config_to_bool {
2071         my $val = shift;
2072
2073         return 1 if !defined $val;             # section.key
2074
2075         # strip leading and trailing whitespace
2076         $val =~ s/^\s+//;
2077         $val =~ s/\s+$//;
2078
2079         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2080                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2081 }
2082
2083 # convert config value to simple decimal number
2084 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2085 # to be multiplied by 1024, 1048576, or 1073741824
2086 sub config_to_int {
2087         my $val = shift;
2088
2089         # strip leading and trailing whitespace
2090         $val =~ s/^\s+//;
2091         $val =~ s/\s+$//;
2092
2093         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2094                 $unit = lc($unit);
2095                 # unknown unit is treated as 1
2096                 return $num * ($unit eq 'g' ? 1073741824 :
2097                                $unit eq 'm' ?    1048576 :
2098                                $unit eq 'k' ?       1024 : 1);
2099         }
2100         return $val;
2101 }
2102
2103 # convert config value to array reference, if needed
2104 sub config_to_multi {
2105         my $val = shift;
2106
2107         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2108 }
2109
2110 sub git_get_project_config {
2111         my ($key, $type) = @_;
2112
2113         # key sanity check
2114         return unless ($key);
2115         $key =~ s/^gitweb\.//;
2116         return if ($key =~ m/\W/);
2117
2118         # type sanity check
2119         if (defined $type) {
2120                 $type =~ s/^--//;
2121                 $type = undef
2122                         unless ($type eq 'bool' || $type eq 'int');
2123         }
2124
2125         # get config
2126         if (!defined $config_file ||
2127             $config_file ne "$git_dir/config") {
2128                 %config = git_parse_project_config('gitweb');
2129                 $config_file = "$git_dir/config";
2130         }
2131
2132         # check if config variable (key) exists
2133         return unless exists $config{"gitweb.$key"};
2134
2135         # ensure given type
2136         if (!defined $type) {
2137                 return $config{"gitweb.$key"};
2138         } elsif ($type eq 'bool') {
2139                 # backward compatibility: 'git config --bool' returns true/false
2140                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2141         } elsif ($type eq 'int') {
2142                 return config_to_int($config{"gitweb.$key"});
2143         }
2144         return $config{"gitweb.$key"};
2145 }
2146
2147 # get hash of given path at given ref
2148 sub git_get_hash_by_path {
2149         my $base = shift;
2150         my $path = shift || return undef;
2151         my $type = shift;
2152
2153         $path =~ s,/+$,,;
2154
2155         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2156                 or die_error(500, "Open git-ls-tree failed");
2157         my $line = <$fd>;
2158         close $fd or return undef;
2159
2160         if (!defined $line) {
2161                 # there is no tree or hash given by $path at $base
2162                 return undef;
2163         }
2164
2165         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2166         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2167         if (defined $type && $type ne $2) {
2168                 # type doesn't match
2169                 return undef;
2170         }
2171         return $3;
2172 }
2173
2174 # get path of entry with given hash at given tree-ish (ref)
2175 # used to get 'from' filename for combined diff (merge commit) for renames
2176 sub git_get_path_by_hash {
2177         my $base = shift || return;
2178         my $hash = shift || return;
2179
2180         local $/ = "\0";
2181
2182         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2183                 or return undef;
2184         while (my $line = <$fd>) {
2185                 chomp $line;
2186
2187                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2188                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2189                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2190                         close $fd;
2191                         return $1;
2192                 }
2193         }
2194         close $fd;
2195         return undef;
2196 }
2197
2198 ## ......................................................................
2199 ## git utility functions, directly accessing git repository
2200
2201 sub git_get_project_description {
2202         my $path = shift;
2203
2204         $git_dir = "$projectroot/$path";
2205         open my $fd, '<', "$git_dir/description"
2206                 or return git_get_project_config('description');
2207         my $descr = <$fd>;
2208         close $fd;
2209         if (defined $descr) {
2210                 chomp $descr;
2211         }
2212         return $descr;
2213 }
2214
2215 sub git_get_project_ctags {
2216         my $path = shift;
2217         my $ctags = {};
2218
2219         $git_dir = "$projectroot/$path";
2220         opendir my $dh, "$git_dir/ctags"
2221                 or return $ctags;
2222         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2223                 open my $ct, '<', $_ or next;
2224                 my $val = <$ct>;
2225                 chomp $val;
2226                 close $ct;
2227                 my $ctag = $_; $ctag =~ s#.*/##;
2228                 $ctags->{$ctag} = $val;
2229         }
2230         closedir $dh;
2231         $ctags;
2232 }
2233
2234 sub git_populate_project_tagcloud {
2235         my $ctags = shift;
2236
2237         # First, merge different-cased tags; tags vote on casing
2238         my %ctags_lc;
2239         foreach (keys %$ctags) {
2240                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2241                 if (not $ctags_lc{lc $_}->{topcount}
2242                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2243                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2244                         $ctags_lc{lc $_}->{topname} = $_;
2245                 }
2246         }
2247
2248         my $cloud;
2249         if (eval { require HTML::TagCloud; 1; }) {
2250                 $cloud = HTML::TagCloud->new;
2251                 foreach (sort keys %ctags_lc) {
2252                         # Pad the title with spaces so that the cloud looks
2253                         # less crammed.
2254                         my $title = $ctags_lc{$_}->{topname};
2255                         $title =~ s/ /&nbsp;/g;
2256                         $title =~ s/^/&nbsp;/g;
2257                         $title =~ s/$/&nbsp;/g;
2258                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2259                 }
2260         } else {
2261                 $cloud = \%ctags_lc;
2262         }
2263         $cloud;
2264 }
2265
2266 sub git_show_project_tagcloud {
2267         my ($cloud, $count) = @_;
2268         print STDERR ref($cloud)."..\n";
2269         if (ref $cloud eq 'HTML::TagCloud') {
2270                 return $cloud->html_and_css($count);
2271         } else {
2272                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2273                 return '<p align="center">' . join (', ', map {
2274                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2275                 } splice(@tags, 0, $count)) . '</p>';
2276         }
2277 }
2278
2279 sub git_get_project_url_list {
2280         my $path = shift;
2281
2282         $git_dir = "$projectroot/$path";
2283         open my $fd, '<', "$git_dir/cloneurl"
2284                 or return wantarray ?
2285                 @{ config_to_multi(git_get_project_config('url')) } :
2286                    config_to_multi(git_get_project_config('url'));
2287         my @git_project_url_list = map { chomp; $_ } <$fd>;
2288         close $fd;
2289
2290         return wantarray ? @git_project_url_list : \@git_project_url_list;
2291 }
2292
2293 sub git_get_projects_list {
2294         my ($filter) = @_;
2295         my @list;
2296
2297         $filter ||= '';
2298         $filter =~ s/\.git$//;
2299
2300         my $check_forks = gitweb_check_feature('forks');
2301
2302         if (-d $projects_list) {
2303                 # search in directory
2304                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2305                 # remove the trailing "/"
2306                 $dir =~ s!/+$!!;
2307                 my $pfxlen = length("$dir");
2308                 my $pfxdepth = ($dir =~ tr!/!!);
2309
2310                 File::Find::find({
2311                         follow_fast => 1, # follow symbolic links
2312                         follow_skip => 2, # ignore duplicates
2313                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2314                         wanted => sub {
2315                                 # skip project-list toplevel, if we get it.
2316                                 return if (m!^[/.]$!);
2317                                 # only directories can be git repositories
2318                                 return unless (-d $_);
2319                                 # don't traverse too deep (Find is super slow on os x)
2320                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2321                                         $File::Find::prune = 1;
2322                                         return;
2323                                 }
2324
2325                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2326                                 # we check related file in $projectroot
2327                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2328                                 if (check_export_ok("$projectroot/$path")) {
2329                                         push @list, { path => $path };
2330                                         $File::Find::prune = 1;
2331                                 }
2332                         },
2333                 }, "$dir");
2334
2335         } elsif (-f $projects_list) {
2336                 # read from file(url-encoded):
2337                 # 'git%2Fgit.git Linus+Torvalds'
2338                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2339                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2340                 my %paths;
2341                 open my $fd, '<', $projects_list or return;
2342         PROJECT:
2343                 while (my $line = <$fd>) {
2344                         chomp $line;
2345                         my ($path, $owner) = split ' ', $line;
2346                         $path = unescape($path);
2347                         $owner = unescape($owner);
2348                         if (!defined $path) {
2349                                 next;
2350                         }
2351                         if ($filter ne '') {
2352                                 # looking for forks;
2353                                 my $pfx = substr($path, 0, length($filter));
2354                                 if ($pfx ne $filter) {
2355                                         next PROJECT;
2356                                 }
2357                                 my $sfx = substr($path, length($filter));
2358                                 if ($sfx !~ /^\/.*\.git$/) {
2359                                         next PROJECT;
2360                                 }
2361                         } elsif ($check_forks) {
2362                         PATH:
2363                                 foreach my $filter (keys %paths) {
2364                                         # looking for forks;
2365                                         my $pfx = substr($path, 0, length($filter));
2366                                         if ($pfx ne $filter) {
2367                                                 next PATH;
2368                                         }
2369                                         my $sfx = substr($path, length($filter));
2370                                         if ($sfx !~ /^\/.*\.git$/) {
2371                                                 next PATH;
2372                                         }
2373                                         # is a fork, don't include it in
2374                                         # the list
2375                                         next PROJECT;
2376                                 }
2377                         }
2378                         if (check_export_ok("$projectroot/$path")) {
2379                                 my $pr = {
2380                                         path => $path,
2381                                         owner => to_utf8($owner),
2382                                 };
2383                                 push @list, $pr;
2384                                 (my $forks_path = $path) =~ s/\.git$//;
2385                                 $paths{$forks_path}++;
2386                         }
2387                 }
2388                 close $fd;
2389         }
2390         return @list;
2391 }
2392
2393 our $gitweb_project_owner = undef;
2394 sub git_get_project_list_from_file {
2395
2396         return if (defined $gitweb_project_owner);
2397
2398         $gitweb_project_owner = {};
2399         # read from file (url-encoded):
2400         # 'git%2Fgit.git Linus+Torvalds'
2401         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2402         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2403         if (-f $projects_list) {
2404                 open(my $fd, '<', $projects_list);
2405                 while (my $line = <$fd>) {
2406                         chomp $line;
2407                         my ($pr, $ow) = split ' ', $line;
2408                         $pr = unescape($pr);
2409                         $ow = unescape($ow);
2410                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2411                 }
2412                 close $fd;
2413         }
2414 }
2415
2416 sub git_get_project_owner {
2417         my $project = shift;
2418         my $owner;
2419
2420         return undef unless $project;
2421         $git_dir = "$projectroot/$project";
2422
2423         if (!defined $gitweb_project_owner) {
2424                 git_get_project_list_from_file();
2425         }
2426
2427         if (exists $gitweb_project_owner->{$project}) {
2428                 $owner = $gitweb_project_owner->{$project};
2429         }
2430         if (!defined $owner){
2431                 $owner = git_get_project_config('owner');
2432         }
2433         if (!defined $owner) {
2434                 $owner = get_file_owner("$git_dir");
2435         }
2436
2437         return $owner;
2438 }
2439
2440 sub git_get_last_activity {
2441         my ($path) = @_;
2442         my $fd;
2443
2444         $git_dir = "$projectroot/$path";
2445         open($fd, "-|", git_cmd(), 'for-each-ref',
2446              '--format=%(committer)',
2447              '--sort=-committerdate',
2448              '--count=1',
2449              'refs/heads') or return;
2450         my $most_recent = <$fd>;
2451         close $fd or return;
2452         if (defined $most_recent &&
2453             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2454                 my $timestamp = $1;
2455                 my $age = time - $timestamp;
2456                 return ($age, age_string($age));
2457         }
2458         return (undef, undef);
2459 }
2460
2461 sub git_get_references {
2462         my $type = shift || "";
2463         my %refs;
2464         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2465         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2466         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2467                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2468                 or return;
2469
2470         while (my $line = <$fd>) {
2471                 chomp $line;
2472                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2473                         if (defined $refs{$1}) {
2474                                 push @{$refs{$1}}, $2;
2475                         } else {
2476                                 $refs{$1} = [ $2 ];
2477                         }
2478                 }
2479         }
2480         close $fd or return;
2481         return \%refs;
2482 }
2483
2484 sub git_get_rev_name_tags {
2485         my $hash = shift || return undef;
2486
2487         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2488                 or return;
2489         my $name_rev = <$fd>;
2490         close $fd;
2491
2492         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2493                 return $1;
2494         } else {
2495                 # catches also '$hash undefined' output
2496                 return undef;
2497         }
2498 }
2499
2500 ## ----------------------------------------------------------------------
2501 ## parse to hash functions
2502
2503 sub parse_date {
2504         my $epoch = shift;
2505         my $tz = shift || "-0000";
2506
2507         my %date;
2508         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2509         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2510         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2511         $date{'hour'} = $hour;
2512         $date{'minute'} = $min;
2513         $date{'mday'} = $mday;
2514         $date{'day'} = $days[$wday];
2515         $date{'month'} = $months[$mon];
2516         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2517                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2518         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2519                              $mday, $months[$mon], $hour ,$min;
2520         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2521                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2522
2523         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2524         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2525         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2526         $date{'hour_local'} = $hour;
2527         $date{'minute_local'} = $min;
2528         $date{'tz_local'} = $tz;
2529         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2530                                   1900+$year, $mon+1, $mday,
2531                                   $hour, $min, $sec, $tz);
2532         return %date;
2533 }
2534
2535 sub parse_tag {
2536         my $tag_id = shift;
2537         my %tag;
2538         my @comment;
2539
2540         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2541         $tag{'id'} = $tag_id;
2542         while (my $line = <$fd>) {
2543                 chomp $line;
2544                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2545                         $tag{'object'} = $1;
2546                 } elsif ($line =~ m/^type (.+)$/) {
2547                         $tag{'type'} = $1;
2548                 } elsif ($line =~ m/^tag (.+)$/) {
2549                         $tag{'name'} = $1;
2550                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2551                         $tag{'author'} = $1;
2552                         $tag{'author_epoch'} = $2;
2553                         $tag{'author_tz'} = $3;
2554                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2555                                 $tag{'author_name'}  = $1;
2556                                 $tag{'author_email'} = $2;
2557                         } else {
2558                                 $tag{'author_name'} = $tag{'author'};
2559                         }
2560                 } elsif ($line =~ m/--BEGIN/) {
2561                         push @comment, $line;
2562                         last;
2563                 } elsif ($line eq "") {
2564                         last;
2565                 }
2566         }
2567         push @comment, <$fd>;
2568         $tag{'comment'} = \@comment;
2569         close $fd or return;
2570         if (!defined $tag{'name'}) {
2571                 return
2572         };
2573         return %tag
2574 }
2575
2576 sub parse_commit_text {
2577         my ($commit_text, $withparents) = @_;
2578         my @commit_lines = split '\n', $commit_text;
2579         my %co;
2580
2581         pop @commit_lines; # Remove '\0'
2582
2583         if (! @commit_lines) {
2584                 return;
2585         }
2586
2587         my $header = shift @commit_lines;
2588         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2589                 return;
2590         }
2591         ($co{'id'}, my @parents) = split ' ', $header;
2592         while (my $line = shift @commit_lines) {
2593                 last if $line eq "\n";
2594                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2595                         $co{'tree'} = $1;
2596                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2597                         push @parents, $1;
2598                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2599                         $co{'author'} = to_utf8($1);
2600                         $co{'author_epoch'} = $2;
2601                         $co{'author_tz'} = $3;
2602                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2603                                 $co{'author_name'}  = $1;
2604                                 $co{'author_email'} = $2;
2605                         } else {
2606                                 $co{'author_name'} = $co{'author'};
2607                         }
2608                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2609                         $co{'committer'} = to_utf8($1);
2610                         $co{'committer_epoch'} = $2;
2611                         $co{'committer_tz'} = $3;
2612                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2613                                 $co{'committer_name'}  = $1;
2614                                 $co{'committer_email'} = $2;
2615                         } else {
2616                                 $co{'committer_name'} = $co{'committer'};
2617                         }
2618                 }
2619         }
2620         if (!defined $co{'tree'}) {
2621                 return;
2622         };
2623         $co{'parents'} = \@parents;
2624         $co{'parent'} = $parents[0];
2625
2626         foreach my $title (@commit_lines) {
2627                 $title =~ s/^    //;
2628                 if ($title ne "") {
2629                         $co{'title'} = chop_str($title, 80, 5);
2630                         # remove leading stuff of merges to make the interesting part visible
2631                         if (length($title) > 50) {
2632                                 $title =~ s/^Automatic //;
2633                                 $title =~ s/^merge (of|with) /Merge ... /i;
2634                                 if (length($title) > 50) {
2635                                         $title =~ s/(http|rsync):\/\///;
2636                                 }
2637                                 if (length($title) > 50) {
2638                                         $title =~ s/(master|www|rsync)\.//;
2639                                 }
2640                                 if (length($title) > 50) {
2641                                         $title =~ s/kernel.org:?//;
2642                                 }
2643                                 if (length($title) > 50) {
2644                                         $title =~ s/\/pub\/scm//;
2645                                 }
2646                         }
2647                         $co{'title_short'} = chop_str($title, 50, 5);
2648                         last;
2649                 }
2650         }
2651         if (! defined $co{'title'} || $co{'title'} eq "") {
2652                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2653         }
2654         # remove added spaces
2655         foreach my $line (@commit_lines) {
2656                 $line =~ s/^    //;
2657         }
2658         $co{'comment'} = \@commit_lines;
2659
2660         my $age = time - $co{'committer_epoch'};
2661         $co{'age'} = $age;
2662         $co{'age_string'} = age_string($age);
2663         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2664         if ($age > 60*60*24*7*2) {
2665                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2666                 $co{'age_string_age'} = $co{'age_string'};
2667         } else {
2668                 $co{'age_string_date'} = $co{'age_string'};
2669                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2670         }
2671         return %co;
2672 }
2673
2674 sub parse_commit {
2675         my ($commit_id) = @_;
2676         my %co;
2677
2678         local $/ = "\0";
2679
2680         open my $fd, "-|", git_cmd(), "rev-list",
2681                 "--parents",
2682                 "--header",
2683                 "--max-count=1",
2684                 $commit_id,
2685                 "--",
2686                 or die_error(500, "Open git-rev-list failed");
2687         %co = parse_commit_text(<$fd>, 1);
2688         close $fd;
2689
2690         return %co;
2691 }
2692
2693 sub parse_commits {
2694         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2695         my @cos;
2696
2697         $maxcount ||= 1;
2698         $skip ||= 0;
2699
2700         local $/ = "\0";
2701
2702         open my $fd, "-|", git_cmd(), "rev-list",
2703                 "--header",
2704                 @args,
2705                 ("--max-count=" . $maxcount),
2706                 ("--skip=" . $skip),
2707                 @extra_options,
2708                 $commit_id,
2709                 "--",
2710                 ($filename ? ($filename) : ())
2711                 or die_error(500, "Open git-rev-list failed");
2712         while (my $line = <$fd>) {
2713                 my %co = parse_commit_text($line);
2714                 push @cos, \%co;
2715         }
2716         close $fd;
2717
2718         return wantarray ? @cos : \@cos;
2719 }
2720
2721 # parse line of git-diff-tree "raw" output
2722 sub parse_difftree_raw_line {
2723         my $line = shift;
2724         my %res;
2725
2726         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2727         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2728         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2729                 $res{'from_mode'} = $1;
2730                 $res{'to_mode'} = $2;
2731                 $res{'from_id'} = $3;
2732                 $res{'to_id'} = $4;
2733                 $res{'status'} = $5;
2734                 $res{'similarity'} = $6;
2735                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2736                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2737                 } else {
2738                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2739                 }
2740         }
2741         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2742         # combined diff (for merge commit)
2743         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2744                 $res{'nparents'}  = length($1);
2745                 $res{'from_mode'} = [ split(' ', $2) ];
2746                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2747                 $res{'from_id'} = [ split(' ', $3) ];
2748                 $res{'to_id'} = pop @{$res{'from_id'}};
2749                 $res{'status'} = [ split('', $4) ];
2750                 $res{'to_file'} = unquote($5);
2751         }
2752         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2753         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2754                 $res{'commit'} = $1;
2755         }
2756
2757         return wantarray ? %res : \%res;
2758 }
2759
2760 # wrapper: return parsed line of git-diff-tree "raw" output
2761 # (the argument might be raw line, or parsed info)
2762 sub parsed_difftree_line {
2763         my $line_or_ref = shift;
2764
2765         if (ref($line_or_ref) eq "HASH") {
2766                 # pre-parsed (or generated by hand)
2767                 return $line_or_ref;
2768         } else {
2769                 return parse_difftree_raw_line($line_or_ref);
2770         }
2771 }
2772
2773 # parse line of git-ls-tree output
2774 sub parse_ls_tree_line {
2775         my $line = shift;
2776         my %opts = @_;
2777         my %res;
2778
2779         if ($opts{'-l'}) {
2780                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2781                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2782
2783                 $res{'mode'} = $1;
2784                 $res{'type'} = $2;
2785                 $res{'hash'} = $3;
2786                 $res{'size'} = $4;
2787                 if ($opts{'-z'}) {
2788                         $res{'name'} = $5;
2789                 } else {
2790                         $res{'name'} = unquote($5);
2791                 }
2792         } else {
2793                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2794                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2795
2796                 $res{'mode'} = $1;
2797                 $res{'type'} = $2;
2798                 $res{'hash'} = $3;
2799                 if ($opts{'-z'}) {
2800                         $res{'name'} = $4;
2801                 } else {
2802                         $res{'name'} = unquote($4);
2803                 }
2804         }
2805
2806         return wantarray ? %res : \%res;
2807 }
2808
2809 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2810 sub parse_from_to_diffinfo {
2811         my ($diffinfo, $from, $to, @parents) = @_;
2812
2813         if ($diffinfo->{'nparents'}) {
2814                 # combined diff
2815                 $from->{'file'} = [];
2816                 $from->{'href'} = [];
2817                 fill_from_file_info($diffinfo, @parents)
2818                         unless exists $diffinfo->{'from_file'};
2819                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2820                         $from->{'file'}[$i] =
2821                                 defined $diffinfo->{'from_file'}[$i] ?
2822                                         $diffinfo->{'from_file'}[$i] :
2823                                         $diffinfo->{'to_file'};
2824                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2825                                 $from->{'href'}[$i] = href(action=>"blob",
2826                                                            hash_base=>$parents[$i],
2827                                                            hash=>$diffinfo->{'from_id'}[$i],
2828                                                            file_name=>$from->{'file'}[$i]);
2829                         } else {
2830                                 $from->{'href'}[$i] = undef;
2831                         }
2832                 }
2833         } else {
2834                 # ordinary (not combined) diff
2835                 $from->{'file'} = $diffinfo->{'from_file'};
2836                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2837                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2838                                                hash=>$diffinfo->{'from_id'},
2839                                                file_name=>$from->{'file'});
2840                 } else {
2841                         delete $from->{'href'};
2842                 }
2843         }
2844
2845         $to->{'file'} = $diffinfo->{'to_file'};
2846         if (!is_deleted($diffinfo)) { # file exists in result
2847                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2848                                      hash=>$diffinfo->{'to_id'},
2849                                      file_name=>$to->{'file'});
2850         } else {
2851                 delete $to->{'href'};
2852         }
2853 }
2854
2855 ## ......................................................................
2856 ## parse to array of hashes functions
2857
2858 sub git_get_heads_list {
2859         my $limit = shift;
2860         my @headslist;
2861
2862         open my $fd, '-|', git_cmd(), 'for-each-ref',
2863                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2864                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2865                 'refs/heads'
2866                 or return;
2867         while (my $line = <$fd>) {
2868                 my %ref_item;
2869
2870                 chomp $line;
2871                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2872                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2873                 my ($committer, $epoch, $tz) =
2874                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2875                 $ref_item{'fullname'}  = $name;
2876                 $name =~ s!^refs/heads/!!;
2877
2878                 $ref_item{'name'}  = $name;
2879                 $ref_item{'id'}    = $hash;
2880                 $ref_item{'title'} = $title || '(no commit message)';
2881                 $ref_item{'epoch'} = $epoch;
2882                 if ($epoch) {
2883                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2884                 } else {
2885                         $ref_item{'age'} = "unknown";
2886                 }
2887
2888                 push @headslist, \%ref_item;
2889         }
2890         close $fd;
2891
2892         return wantarray ? @headslist : \@headslist;
2893 }
2894
2895 sub git_get_tags_list {
2896         my $limit = shift;
2897         my @tagslist;
2898
2899         open my $fd, '-|', git_cmd(), 'for-each-ref',
2900                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2901                 '--format=%(objectname) %(objecttype) %(refname) '.
2902                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2903                 'refs/tags'
2904                 or return;
2905         while (my $line = <$fd>) {
2906                 my %ref_item;
2907
2908                 chomp $line;
2909                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2910                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2911                 my ($creator, $epoch, $tz) =
2912                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2913                 $ref_item{'fullname'} = $name;
2914                 $name =~ s!^refs/tags/!!;
2915
2916                 $ref_item{'type'} = $type;
2917                 $ref_item{'id'} = $id;
2918                 $ref_item{'name'} = $name;
2919                 if ($type eq "tag") {
2920                         $ref_item{'subject'} = $title;
2921                         $ref_item{'reftype'} = $reftype;
2922                         $ref_item{'refid'}   = $refid;
2923                 } else {
2924                         $ref_item{'reftype'} = $type;
2925                         $ref_item{'refid'}   = $id;
2926                 }
2927
2928                 if ($type eq "tag" || $type eq "commit") {
2929                         $ref_item{'epoch'} = $epoch;
2930                         if ($epoch) {
2931                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2932                         } else {
2933                                 $ref_item{'age'} = "unknown";
2934                         }
2935                 }
2936
2937                 push @tagslist, \%ref_item;
2938         }
2939         close $fd;
2940
2941         return wantarray ? @tagslist : \@tagslist;
2942 }
2943
2944 ## ----------------------------------------------------------------------
2945 ## filesystem-related functions
2946
2947 sub get_file_owner {
2948         my $path = shift;
2949
2950         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2951         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2952         if (!defined $gcos) {
2953                 return undef;
2954         }
2955         my $owner = $gcos;
2956         $owner =~ s/[,;].*$//;
2957         return to_utf8($owner);
2958 }
2959
2960 # assume that file exists
2961 sub insert_file {
2962         my $filename = shift;
2963
2964         open my $fd, '<', $filename;
2965         print map { to_utf8($_) } <$fd>;
2966         close $fd;
2967 }
2968
2969 ## ......................................................................
2970 ## mimetype related functions
2971
2972 sub mimetype_guess_file {
2973         my $filename = shift;
2974         my $mimemap = shift;
2975         -r $mimemap or return undef;
2976
2977         my %mimemap;
2978         open(my $mh, '<', $mimemap) or return undef;
2979         while (<$mh>) {
2980                 next if m/^#/; # skip comments
2981                 my ($mimetype, $exts) = split(/\t+/);
2982                 if (defined $exts) {
2983                         my @exts = split(/\s+/, $exts);
2984                         foreach my $ext (@exts) {
2985                                 $mimemap{$ext} = $mimetype;
2986                         }
2987                 }
2988         }
2989         close($mh);
2990
2991         $filename =~ /\.([^.]*)$/;
2992         return $mimemap{$1};
2993 }
2994
2995 sub mimetype_guess {
2996         my $filename = shift;
2997         my $mime;
2998         $filename =~ /\./ or return undef;
2999
3000         if ($mimetypes_file) {
3001                 my $file = $mimetypes_file;
3002                 if ($file !~ m!^/!) { # if it is relative path
3003                         # it is relative to project
3004                         $file = "$projectroot/$project/$file";
3005                 }
3006                 $mime = mimetype_guess_file($filename, $file);
3007         }
3008         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3009         return $mime;
3010 }
3011
3012 sub blob_mimetype {
3013         my $fd = shift;
3014         my $filename = shift;
3015
3016         if ($filename) {
3017                 my $mime = mimetype_guess($filename);
3018                 $mime and return $mime;
3019         }
3020
3021         # just in case
3022         return $default_blob_plain_mimetype unless $fd;
3023
3024         if (-T $fd) {
3025                 return 'text/plain';
3026         } elsif (! $filename) {
3027                 return 'application/octet-stream';
3028         } elsif ($filename =~ m/\.png$/i) {
3029                 return 'image/png';
3030         } elsif ($filename =~ m/\.gif$/i) {
3031                 return 'image/gif';
3032         } elsif ($filename =~ m/\.jpe?g$/i) {
3033                 return 'image/jpeg';
3034         } else {
3035                 return 'application/octet-stream';
3036         }
3037 }
3038
3039 sub blob_contenttype {
3040         my ($fd, $file_name, $type) = @_;
3041
3042         $type ||= blob_mimetype($fd, $file_name);
3043         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3044                 $type .= "; charset=$default_text_plain_charset";
3045         }
3046
3047         return $type;
3048 }
3049
3050 ## ======================================================================
3051 ## functions printing HTML: header, footer, error page
3052
3053 sub git_header_html {
3054         my $status = shift || "200 OK";
3055         my $expires = shift;
3056
3057         my $title = "$site_name";
3058         if (defined $project) {
3059                 $title .= " - " . to_utf8($project);
3060                 if (defined $action) {
3061                         $title .= "/$action";
3062                         if (defined $file_name) {
3063                                 $title .= " - " . esc_path($file_name);
3064                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3065                                         $title .= "/";
3066                                 }
3067                         }
3068                 }
3069         }
3070         my $content_type;
3071         # require explicit support from the UA if we are to send the page as
3072         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3073         # we have to do this because MSIE sometimes globs '*/*', pretending to
3074         # support xhtml+xml but choking when it gets what it asked for.
3075         if (defined $cgi->http('HTTP_ACCEPT') &&
3076             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3077             $cgi->Accept('application/xhtml+xml') != 0) {
3078                 $content_type = 'application/xhtml+xml';
3079         } else {
3080                 $content_type = 'text/html';
3081         }
3082         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3083                            -status=> $status, -expires => $expires);
3084         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3085         print <<EOF;
3086 <?xml version="1.0" encoding="utf-8"?>
3087 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3088 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3089 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3090 <!-- git core binaries version $git_version -->
3091 <head>
3092 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3093 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3094 <meta name="robots" content="index, nofollow"/>
3095 <title>$title</title>
3096 EOF
3097         # the stylesheet, favicon etc urls won't work correctly with path_info
3098         # unless we set the appropriate base URL
3099         if ($ENV{'PATH_INFO'}) {
3100                 print "<base href=\"".esc_url($base_url)."\" />\n";
3101         }
3102         # print out each stylesheet that exist, providing backwards capability
3103         # for those people who defined $stylesheet in a config file
3104         if (defined $stylesheet) {
3105                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3106         } else {
3107                 foreach my $stylesheet (@stylesheets) {
3108                         next unless $stylesheet;
3109                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3110                 }
3111         }
3112         if (defined $project) {
3113                 my %href_params = get_feed_info();
3114                 if (!exists $href_params{'-title'}) {
3115                         $href_params{'-title'} = 'log';
3116                 }
3117
3118                 foreach my $format qw(RSS Atom) {
3119                         my $type = lc($format);
3120                         my %link_attr = (
3121                                 '-rel' => 'alternate',
3122                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3123                                 '-type' => "application/$type+xml"
3124                         );
3125
3126                         $href_params{'action'} = $type;
3127                         $link_attr{'-href'} = href(%href_params);
3128                         print "<link ".
3129                               "rel=\"$link_attr{'-rel'}\" ".
3130                               "title=\"$link_attr{'-title'}\" ".
3131                               "href=\"$link_attr{'-href'}\" ".
3132                               "type=\"$link_attr{'-type'}\" ".
3133                               "/>\n";
3134
3135                         $href_params{'extra_options'} = '--no-merges';
3136                         $link_attr{'-href'} = href(%href_params);
3137                         $link_attr{'-title'} .= ' (no merges)';
3138                         print "<link ".
3139                               "rel=\"$link_attr{'-rel'}\" ".
3140                               "title=\"$link_attr{'-title'}\" ".
3141                               "href=\"$link_attr{'-href'}\" ".
3142                               "type=\"$link_attr{'-type'}\" ".
3143                               "/>\n";
3144                 }
3145
3146         } else {
3147                 printf('<link rel="alternate" title="%s projects list" '.
3148                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3149                        $site_name, href(project=>undef, action=>"project_index"));
3150                 printf('<link rel="alternate" title="%s projects feeds" '.
3151                        'href="%s" type="text/x-opml" />'."\n",
3152                        $site_name, href(project=>undef, action=>"opml"));
3153         }
3154         if (defined $favicon) {
3155                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3156         }
3157
3158         print "</head>\n" .
3159               "<body>\n";
3160
3161         if (-f $site_header) {
3162                 insert_file($site_header);
3163         }
3164
3165         print "<div class=\"page_header\">\n" .
3166               $cgi->a({-href => esc_url($logo_url),
3167                        -title => $logo_label},
3168                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3169         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3170         if (defined $project) {
3171                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3172                 if (defined $action) {
3173                         print " / $action";
3174                 }
3175                 print "\n";
3176         }
3177         print "</div>\n";
3178
3179         my $have_search = gitweb_check_feature('search');
3180         if (defined $project && $have_search) {
3181                 if (!defined $searchtext) {
3182                         $searchtext = "";
3183                 }
3184                 my $search_hash;
3185                 if (defined $hash_base) {
3186                         $search_hash = $hash_base;
3187                 } elsif (defined $hash) {
3188                         $search_hash = $hash;
3189                 } else {
3190                         $search_hash = "HEAD";
3191                 }
3192                 my $action = $my_uri;
3193                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3194                 if ($use_pathinfo) {
3195                         $action .= "/".esc_url($project);
3196                 }
3197                 print $cgi->startform(-method => "get", -action => $action) .
3198                       "<div class=\"search\">\n" .
3199                       (!$use_pathinfo &&
3200                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3201                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3202                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3203                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3204                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3205                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3206                       " search:\n",
3207                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3208                       "<span title=\"Extended regular expression\">" .
3209                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3210                                      -checked => $search_use_regexp) .
3211                       "</span>" .
3212                       "</div>" .
3213                       $cgi->end_form() . "\n";
3214         }
3215 }
3216
3217 sub git_footer_html {
3218         my $feed_class = 'rss_logo';
3219
3220         print "<div class=\"page_footer\">\n";
3221         if (defined $project) {
3222                 my $descr = git_get_project_description($project);
3223                 if (defined $descr) {
3224                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3225                 }
3226
3227                 my %href_params = get_feed_info();
3228                 if (!%href_params) {
3229                         $feed_class .= ' generic';
3230                 }
3231                 $href_params{'-title'} ||= 'log';
3232
3233                 foreach my $format qw(RSS Atom) {
3234                         $href_params{'action'} = lc($format);
3235                         print $cgi->a({-href => href(%href_params),
3236                                       -title => "$href_params{'-title'} $format feed",
3237                                       -class => $feed_class}, $format)."\n";
3238                 }
3239
3240         } else {
3241                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3242                               -class => $feed_class}, "OPML") . " ";
3243                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3244                               -class => $feed_class}, "TXT") . "\n";
3245         }
3246         print "</div>\n"; # class="page_footer"
3247
3248         if (-f $site_footer) {
3249                 insert_file($site_footer);
3250         }
3251
3252         print "</body>\n" .
3253               "</html>";
3254 }
3255
3256 # die_error(<http_status_code>, <error_message>)
3257 # Example: die_error(404, 'Hash not found')
3258 # By convention, use the following status codes (as defined in RFC 2616):
3259 # 400: Invalid or missing CGI parameters, or
3260 #      requested object exists but has wrong type.
3261 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3262 #      this server or project.
3263 # 404: Requested object/revision/project doesn't exist.
3264 # 500: The server isn't configured properly, or
3265 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3266 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3267 sub die_error {
3268         my $status = shift || 500;
3269         my $error = shift || "Internal server error";
3270
3271         my %http_responses = (400 => '400 Bad Request',
3272                               403 => '403 Forbidden',
3273                               404 => '404 Not Found',
3274                               500 => '500 Internal Server Error');
3275         git_header_html($http_responses{$status});
3276         print <<EOF;
3277 <div class="page_body">
3278 <br /><br />
3279 $status - $error
3280 <br />
3281 </div>
3282 EOF
3283         git_footer_html();
3284         exit;
3285 }
3286
3287 ## ----------------------------------------------------------------------
3288 ## functions printing or outputting HTML: navigation
3289
3290 sub git_print_page_nav {
3291         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3292         $extra = '' if !defined $extra; # pager or formats
3293
3294         my @navs = qw(summary shortlog log commit commitdiff tree);
3295         if ($suppress) {
3296                 @navs = grep { $_ ne $suppress } @navs;
3297         }
3298
3299         my %arg = map { $_ => {action=>$_} } @navs;
3300         if (defined $head) {
3301                 for (qw(commit commitdiff)) {
3302                         $arg{$_}{'hash'} = $head;
3303                 }
3304                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3305                         for (qw(shortlog log)) {
3306                                 $arg{$_}{'hash'} = $head;
3307                         }
3308                 }
3309         }
3310
3311         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3312         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3313
3314         my @actions = gitweb_get_feature('actions');
3315         my %repl = (
3316                 '%' => '%',
3317                 'n' => $project,         # project name
3318                 'f' => $git_dir,         # project path within filesystem
3319                 'h' => $treehead || '',  # current hash ('h' parameter)
3320                 'b' => $treebase || '',  # hash base ('hb' parameter)
3321         );
3322         while (@actions) {
3323                 my ($label, $link, $pos) = splice(@actions,0,3);
3324                 # insert
3325                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3326                 # munch munch
3327                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3328                 $arg{$label}{'_href'} = $link;
3329         }
3330
3331         print "<div class=\"page_nav\">\n" .
3332                 (join " | ",
3333                  map { $_ eq $current ?
3334                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3335                  } @navs);
3336         print "<br/>\n$extra<br/>\n" .
3337               "</div>\n";
3338 }
3339
3340 sub format_paging_nav {
3341         my ($action, $hash, $head, $page, $has_next_link) = @_;
3342         my $paging_nav;
3343
3344
3345         if ($hash ne $head || $page) {
3346                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3347         } else {
3348                 $paging_nav .= "HEAD";
3349         }
3350
3351         if ($page > 0) {
3352                 $paging_nav .= " &sdot; " .
3353                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3354                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3355         } else {
3356                 $paging_nav .= " &sdot; prev";
3357         }
3358
3359         if ($has_next_link) {
3360                 $paging_nav .= " &sdot; " .
3361                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3362                                  -accesskey => "n", -title => "Alt-n"}, "next");
3363         } else {
3364                 $paging_nav .= " &sdot; next";
3365         }
3366
3367         return $paging_nav;
3368 }
3369
3370 ## ......................................................................
3371 ## functions printing or outputting HTML: div
3372
3373 sub git_print_header_div {
3374         my ($action, $title, $hash, $hash_base) = @_;
3375         my %args = ();
3376
3377         $args{'action'} = $action;
3378         $args{'hash'} = $hash if $hash;
3379         $args{'hash_base'} = $hash_base if $hash_base;
3380
3381         print "<div class=\"header\">\n" .
3382               $cgi->a({-href => href(%args), -class => "title"},
3383               $title ? $title : $action) .
3384               "\n</div>\n";
3385 }
3386
3387 sub print_local_time {
3388         my %date = @_;
3389         if ($date{'hour_local'} < 6) {
3390                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3391                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3392         } else {
3393                 printf(" (%02d:%02d %s)",
3394                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3395         }
3396 }
3397
3398 # Outputs the author name and date in long form
3399 sub git_print_authorship {
3400         my $co = shift;
3401         my %opts = @_;
3402         my $tag = $opts{-tag} || 'div';
3403
3404         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3405         print "<$tag class=\"author_date\">" .
3406               esc_html($co->{'author_name'}) .
3407               " [$ad{'rfc2822'}";
3408         print_local_time(%ad) if ($opts{-localtime});
3409         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3410                   . "</$tag>\n";
3411 }
3412
3413 # Outputs table rows containing the full author or committer information,
3414 # in the format expected for 'commit' view (& similia).
3415 # Parameters are a commit hash reference, followed by the list of people
3416 # to output information for. If the list is empty it defalts to both
3417 # author and committer.
3418 sub git_print_authorship_rows {
3419         my $co = shift;
3420         # too bad we can't use @people = @_ || ('author', 'committer')
3421         my @people = @_;
3422         @people = ('author', 'committer') unless @people;
3423         foreach my $who (@people) {
3424                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3425                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3426                       "<td rowspan=\"2\">" .
3427                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3428                       "</td></tr>\n" .
3429                       "<tr>" .
3430                       "<td></td><td> $wd{'rfc2822'}";
3431                 print_local_time(%wd);
3432                 print "</td>" .
3433                       "</tr>\n";
3434         }
3435 }
3436
3437 sub git_print_page_path {
3438         my $name = shift;
3439         my $type = shift;
3440         my $hb = shift;
3441
3442
3443         print "<div class=\"page_path\">";
3444         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3445                       -title => 'tree root'}, to_utf8("[$project]"));
3446         print " / ";
3447         if (defined $name) {
3448                 my @dirname = split '/', $name;
3449                 my $basename = pop @dirname;
3450                 my $fullname = '';
3451
3452                 foreach my $dir (@dirname) {
3453                         $fullname .= ($fullname ? '/' : '') . $dir;
3454                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3455                                                      hash_base=>$hb),
3456                                       -title => $fullname}, esc_path($dir));
3457                         print " / ";
3458                 }
3459                 if (defined $type && $type eq 'blob') {
3460                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3461                                                      hash_base=>$hb),
3462                                       -title => $name}, esc_path($basename));
3463                 } elsif (defined $type && $type eq 'tree') {
3464                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3465                                                      hash_base=>$hb),
3466                                       -title => $name}, esc_path($basename));
3467                         print " / ";
3468                 } else {
3469                         print esc_path($basename);
3470                 }
3471         }
3472         print "<br/></div>\n";
3473 }
3474
3475 sub git_print_log {
3476         my $log = shift;
3477         my %opts = @_;
3478
3479         if ($opts{'-remove_title'}) {
3480                 # remove title, i.e. first line of log
3481                 shift @$log;
3482         }
3483         # remove leading empty lines
3484         while (defined $log->[0] && $log->[0] eq "") {
3485                 shift @$log;
3486         }
3487
3488         # print log
3489         my $signoff = 0;
3490         my $empty = 0;
3491         foreach my $line (@$log) {
3492                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3493                         $signoff = 1;
3494                         $empty = 0;
3495                         if (! $opts{'-remove_signoff'}) {
3496                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3497                                 next;
3498                         } else {
3499                                 # remove signoff lines
3500                                 next;
3501                         }
3502                 } else {
3503                         $signoff = 0;
3504                 }
3505
3506                 # print only one empty line
3507                 # do not print empty line after signoff
3508                 if ($line eq "") {
3509                         next if ($empty || $signoff);
3510                         $empty = 1;
3511                 } else {
3512                         $empty = 0;
3513                 }
3514
3515                 print format_log_line_html($line) . "<br/>\n";
3516         }
3517
3518         if ($opts{'-final_empty_line'}) {
3519                 # end with single empty line
3520                 print "<br/>\n" unless $empty;
3521         }
3522 }
3523
3524 # return link target (what link points to)
3525 sub git_get_link_target {
3526         my $hash = shift;
3527         my $link_target;
3528
3529         # read link
3530         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3531                 or return;
3532         {
3533                 local $/ = undef;
3534                 $link_target = <$fd>;
3535         }
3536         close $fd
3537                 or return;
3538
3539         return $link_target;
3540 }
3541
3542 # given link target, and the directory (basedir) the link is in,
3543 # return target of link relative to top directory (top tree);
3544 # return undef if it is not possible (including absolute links).
3545 sub normalize_link_target {
3546         my ($link_target, $basedir) = @_;
3547
3548         # absolute symlinks (beginning with '/') cannot be normalized
3549         return if (substr($link_target, 0, 1) eq '/');
3550
3551         # normalize link target to path from top (root) tree (dir)
3552         my $path;
3553         if ($basedir) {
3554                 $path = $basedir . '/' . $link_target;
3555         } else {
3556                 # we are in top (root) tree (dir)
3557                 $path = $link_target;
3558         }
3559
3560         # remove //, /./, and /../
3561         my @path_parts;
3562         foreach my $part (split('/', $path)) {
3563                 # discard '.' and ''
3564                 next if (!$part || $part eq '.');
3565                 # handle '..'
3566                 if ($part eq '..') {
3567                         if (@path_parts) {
3568                                 pop @path_parts;
3569                         } else {
3570                                 # link leads outside repository (outside top dir)
3571                                 return;
3572                         }
3573                 } else {
3574                         push @path_parts, $part;
3575                 }
3576         }
3577         $path = join('/', @path_parts);
3578
3579         return $path;
3580 }
3581
3582 # print tree entry (row of git_tree), but without encompassing <tr> element
3583 sub git_print_tree_entry {
3584         my ($t, $basedir, $hash_base, $have_blame) = @_;
3585
3586         my %base_key = ();
3587         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3588
3589         # The format of a table row is: mode list link.  Where mode is
3590         # the mode of the entry, list is the name of the entry, an href,
3591         # and link is the action links of the entry.
3592
3593         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3594         if (exists $t->{'size'}) {
3595                 print "<td class=\"size\">$t->{'size'}</td>\n";
3596         }
3597         if ($t->{'type'} eq "blob") {
3598                 print "<td class=\"list\">" .
3599                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3600                                                file_name=>"$basedir$t->{'name'}", %base_key),
3601                                 -class => "list"}, esc_path($t->{'name'}));
3602                 if (S_ISLNK(oct $t->{'mode'})) {
3603                         my $link_target = git_get_link_target($t->{'hash'});
3604                         if ($link_target) {
3605                                 my $norm_target = normalize_link_target($link_target, $basedir);
3606                                 if (defined $norm_target) {
3607                                         print " -> " .
3608                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3609                                                                      file_name=>$norm_target),
3610                                                        -title => $norm_target}, esc_path($link_target));
3611                                 } else {
3612                                         print " -> " . esc_path($link_target);
3613                                 }
3614                         }
3615                 }
3616                 print "</td>\n";
3617                 print "<td class=\"link\">";
3618                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3619                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3620                               "blob");
3621                 if ($have_blame) {
3622                         print " | " .
3623                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3624                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3625                                       "blame");
3626                 }
3627                 if (defined $hash_base) {
3628                         print " | " .
3629                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3630                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3631                                       "history");
3632                 }
3633                 print " | " .
3634                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3635                                                file_name=>"$basedir$t->{'name'}")},
3636                                 "raw");
3637                 print "</td>\n";
3638
3639         } elsif ($t->{'type'} eq "tree") {
3640                 print "<td class=\"list\">";
3641                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3642                                              file_name=>"$basedir$t->{'name'}",
3643                                              %base_key)},
3644                               esc_path($t->{'name'}));
3645                 print "</td>\n";
3646                 print "<td class=\"link\">";
3647                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3648                                              file_name=>"$basedir$t->{'name'}",
3649                                              %base_key)},
3650                               "tree");
3651                 if (defined $hash_base) {
3652                         print " | " .
3653                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3654                                                      file_name=>"$basedir$t->{'name'}")},
3655                                       "history");
3656                 }
3657                 print "</td>\n";
3658         } else {
3659                 # unknown object: we can only present history for it
3660                 # (this includes 'commit' object, i.e. submodule support)
3661                 print "<td class=\"list\">" .
3662                       esc_path($t->{'name'}) .
3663                       "</td>\n";
3664                 print "<td class=\"link\">";
3665                 if (defined $hash_base) {
3666                         print $cgi->a({-href => href(action=>"history",
3667                                                      hash_base=>$hash_base,
3668                                                      file_name=>"$basedir$t->{'name'}")},
3669                                       "history");
3670                 }
3671                 print "</td>\n";
3672         }
3673 }
3674
3675 ## ......................................................................
3676 ## functions printing large fragments of HTML
3677
3678 # get pre-image filenames for merge (combined) diff
3679 sub fill_from_file_info {
3680         my ($diff, @parents) = @_;
3681
3682         $diff->{'from_file'} = [ ];
3683         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3684         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3685                 if ($diff->{'status'}[$i] eq 'R' ||
3686                     $diff->{'status'}[$i] eq 'C') {
3687                         $diff->{'from_file'}[$i] =
3688                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3689                 }
3690         }
3691
3692         return $diff;
3693 }
3694
3695 # is current raw difftree line of file deletion
3696 sub is_deleted {
3697         my $diffinfo = shift;
3698
3699         return $diffinfo->{'to_id'} eq ('0' x 40);
3700 }
3701
3702 # does patch correspond to [previous] difftree raw line
3703 # $diffinfo  - hashref of parsed raw diff format
3704 # $patchinfo - hashref of parsed patch diff format
3705 #              (the same keys as in $diffinfo)
3706 sub is_patch_split {
3707         my ($diffinfo, $patchinfo) = @_;
3708
3709         return defined $diffinfo && defined $patchinfo
3710                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3711 }
3712
3713
3714 sub git_difftree_body {
3715         my ($difftree, $hash, @parents) = @_;
3716         my ($parent) = $parents[0];
3717         my $have_blame = gitweb_check_feature('blame');
3718         print "<div class=\"list_head\">\n";
3719         if ($#{$difftree} > 10) {
3720                 print(($#{$difftree} + 1) . " files changed:\n");
3721         }
3722         print "</div>\n";
3723
3724         print "<table class=\"" .
3725               (@parents > 1 ? "combined " : "") .
3726               "diff_tree\">\n";
3727
3728         # header only for combined diff in 'commitdiff' view
3729         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3730         if ($has_header) {
3731                 # table header
3732                 print "<thead><tr>\n" .
3733                        "<th></th><th></th>\n"; # filename, patchN link
3734                 for (my $i = 0; $i < @parents; $i++) {
3735                         my $par = $parents[$i];
3736                         print "<th>" .
3737                               $cgi->a({-href => href(action=>"commitdiff",
3738                                                      hash=>$hash, hash_parent=>$par),
3739                                        -title => 'commitdiff to parent number ' .
3740                                                   ($i+1) . ': ' . substr($par,0,7)},
3741                                       $i+1) .
3742                               "&nbsp;</th>\n";
3743                 }
3744                 print "</tr></thead>\n<tbody>\n";
3745         }
3746
3747         my $alternate = 1;
3748         my $patchno = 0;
3749         foreach my $line (@{$difftree}) {
3750                 my $diff = parsed_difftree_line($line);
3751
3752                 if ($alternate) {
3753                         print "<tr class=\"dark\">\n";
3754                 } else {
3755                         print "<tr class=\"light\">\n";
3756                 }
3757                 $alternate ^= 1;
3758
3759                 if (exists $diff->{'nparents'}) { # combined diff
3760
3761                         fill_from_file_info($diff, @parents)
3762                                 unless exists $diff->{'from_file'};
3763
3764                         if (!is_deleted($diff)) {
3765                                 # file exists in the result (child) commit
3766                                 print "<td>" .
3767                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3768                                                              file_name=>$diff->{'to_file'},
3769                                                              hash_base=>$hash),
3770                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3771                                       "</td>\n";
3772                         } else {
3773                                 print "<td>" .
3774                                       esc_path($diff->{'to_file'}) .
3775                                       "</td>\n";
3776                         }
3777
3778                         if ($action eq 'commitdiff') {
3779                                 # link to patch
3780                                 $patchno++;
3781                                 print "<td class=\"link\">" .
3782                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3783                                       " | " .
3784                                       "</td>\n";
3785                         }
3786
3787                         my $has_history = 0;
3788                         my $not_deleted = 0;
3789                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3790                                 my $hash_parent = $parents[$i];
3791                                 my $from_hash = $diff->{'from_id'}[$i];
3792                                 my $from_path = $diff->{'from_file'}[$i];
3793                                 my $status = $diff->{'status'}[$i];
3794
3795                                 $has_history ||= ($status ne 'A');
3796                                 $not_deleted ||= ($status ne 'D');
3797
3798                                 if ($status eq 'A') {
3799                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3800                                 } elsif ($status eq 'D') {
3801                                         print "<td class=\"link\">" .
3802                                               $cgi->a({-href => href(action=>"blob",
3803                                                                      hash_base=>$hash,
3804                                                                      hash=>$from_hash,
3805                                                                      file_name=>$from_path)},
3806                                                       "blob" . ($i+1)) .
3807                                               " | </td>\n";
3808                                 } else {
3809                                         if ($diff->{'to_id'} eq $from_hash) {
3810                                                 print "<td class=\"link nochange\">";
3811                                         } else {
3812                                                 print "<td class=\"link\">";
3813                                         }
3814                                         print $cgi->a({-href => href(action=>"blobdiff",
3815                                                                      hash=>$diff->{'to_id'},
3816                                                                      hash_parent=>$from_hash,
3817                                                                      hash_base=>$hash,
3818                                                                      hash_parent_base=>$hash_parent,
3819                                                                      file_name=>$diff->{'to_file'},
3820                                                                      file_parent=>$from_path)},
3821                                                       "diff" . ($i+1)) .
3822                                               " | </td>\n";
3823                                 }
3824                         }
3825
3826                         print "<td class=\"link\">";
3827                         if ($not_deleted) {
3828                                 print $cgi->a({-href => href(action=>"blob",
3829                                                              hash=>$diff->{'to_id'},
3830                                                              file_name=>$diff->{'to_file'},
3831                                                              hash_base=>$hash)},
3832                                               "blob");
3833                                 print " | " if ($has_history);
3834                         }
3835                         if ($has_history) {
3836                                 print $cgi->a({-href => href(action=>"history",
3837                                                              file_name=>$diff->{'to_file'},
3838                                                              hash_base=>$hash)},
3839                                               "history");
3840                         }
3841                         print "</td>\n";
3842
3843                         print "</tr>\n";
3844                         next; # instead of 'else' clause, to avoid extra indent
3845                 }
3846                 # else ordinary diff
3847
3848                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3849                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3850                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3851                         $to_mode_oct = oct $diff->{'to_mode'};
3852                         if (S_ISREG($to_mode_oct)) { # only for regular file
3853                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3854                         }
3855                         $to_file_type = file_type($diff->{'to_mode'});
3856                 }
3857                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3858                         $from_mode_oct = oct $diff->{'from_mode'};
3859                         if (S_ISREG($to_mode_oct)) { # only for regular file
3860                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3861                         }
3862                         $from_file_type = file_type($diff->{'from_mode'});
3863                 }
3864
3865                 if ($diff->{'status'} eq "A") { # created
3866                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3867                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3868                         $mode_chng   .= "]</span>";
3869                         print "<td>";
3870                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3871                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3872                                       -class => "list"}, esc_path($diff->{'file'}));
3873                         print "</td>\n";
3874                         print "<td>$mode_chng</td>\n";
3875                         print "<td class=\"link\">";
3876                         if ($action eq 'commitdiff') {
3877                                 # link to patch
3878                                 $patchno++;
3879                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3880                                 print " | ";
3881                         }
3882                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3883                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3884                                       "blob");
3885                         print "</td>\n";
3886
3887                 } elsif ($diff->{'status'} eq "D") { # deleted
3888                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3889                         print "<td>";
3890                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3891                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3892                                        -class => "list"}, esc_path($diff->{'file'}));
3893                         print "</td>\n";
3894                         print "<td>$mode_chng</td>\n";
3895                         print "<td class=\"link\">";
3896                         if ($action eq 'commitdiff') {
3897                                 # link to patch
3898                                 $patchno++;
3899                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3900                                 print " | ";
3901                         }
3902                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3903                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3904                                       "blob") . " | ";
3905                         if ($have_blame) {
3906                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3907                                                              file_name=>$diff->{'file'})},
3908                                               "blame") . " | ";
3909                         }
3910                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3911                                                      file_name=>$diff->{'file'})},
3912                                       "history");
3913                         print "</td>\n";
3914
3915                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3916                         my $mode_chnge = "";
3917                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3918                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3919                                 if ($from_file_type ne $to_file_type) {
3920                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3921                                 }
3922                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3923                                         if ($from_mode_str && $to_mode_str) {
3924                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3925                                         } elsif ($to_mode_str) {
3926                                                 $mode_chnge .= " mode: $to_mode_str";
3927                                         }
3928                                 }
3929                                 $mode_chnge .= "]</span>\n";
3930                         }
3931                         print "<td>";
3932                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3933                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3934                                       -class => "list"}, esc_path($diff->{'file'}));
3935                         print "</td>\n";
3936                         print "<td>$mode_chnge</td>\n";
3937                         print "<td class=\"link\">";
3938                         if ($action eq 'commitdiff') {
3939                                 # link to patch
3940                                 $patchno++;
3941                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3942                                       " | ";
3943                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3944                                 # "commit" view and modified file (not onlu mode changed)
3945                                 print $cgi->a({-href => href(action=>"blobdiff",
3946                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3947                                                              hash_base=>$hash, hash_parent_base=>$parent,
3948                                                              file_name=>$diff->{'file'})},
3949                                               "diff") .
3950                                       " | ";
3951                         }
3952                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3953                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3954                                        "blob") . " | ";
3955                         if ($have_blame) {
3956                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3957                                                              file_name=>$diff->{'file'})},
3958                                               "blame") . " | ";
3959                         }
3960                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3961                                                      file_name=>$diff->{'file'})},
3962                                       "history");
3963                         print "</td>\n";
3964
3965                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3966                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3967                         my $nstatus = $status_name{$diff->{'status'}};
3968                         my $mode_chng = "";
3969                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3970                                 # mode also for directories, so we cannot use $to_mode_str
3971                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3972                         }
3973                         print "<td>" .
3974                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3975                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3976                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3977                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3978                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3979                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3980                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3981                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3982                               "<td class=\"link\">";
3983                         if ($action eq 'commitdiff') {
3984                                 # link to patch
3985                                 $patchno++;
3986                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3987                                       " | ";
3988                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3989                                 # "commit" view and modified file (not only pure rename or copy)
3990                                 print $cgi->a({-href => href(action=>"blobdiff",
3991                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3992                                                              hash_base=>$hash, hash_parent_base=>$parent,
3993                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3994                                               "diff") .
3995                                       " | ";
3996                         }
3997                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3998                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3999                                       "blob") . " | ";
4000                         if ($have_blame) {
4001                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4002                                                              file_name=>$diff->{'to_file'})},
4003                                               "blame") . " | ";
4004                         }
4005                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4006                                                     file_name=>$diff->{'to_file'})},
4007                                       "history");
4008                         print "</td>\n";
4009
4010                 } # we should not encounter Unmerged (U) or Unknown (X) status
4011                 print "</tr>\n";
4012         }
4013         print "</tbody>" if $has_header;
4014         print "</table>\n";
4015 }
4016
4017 sub git_patchset_body {
4018         my ($fd, $difftree, $hash, @hash_parents) = @_;
4019         my ($hash_parent) = $hash_parents[0];
4020
4021         my $is_combined = (@hash_parents > 1);
4022         my $patch_idx = 0;
4023         my $patch_number = 0;
4024         my $patch_line;
4025         my $diffinfo;
4026         my $to_name;
4027         my (%from, %to);
4028
4029         print "<div class=\"patchset\">\n";
4030
4031         # skip to first patch
4032         while ($patch_line = <$fd>) {
4033                 chomp $patch_line;
4034
4035                 last if ($patch_line =~ m/^diff /);
4036         }
4037
4038  PATCH:
4039         while ($patch_line) {
4040
4041                 # parse "git diff" header line
4042                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4043                         # $1 is from_name, which we do not use
4044                         $to_name = unquote($2);
4045                         $to_name =~ s!^b/!!;
4046                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4047                         # $1 is 'cc' or 'combined', which we do not use
4048                         $to_name = unquote($2);
4049                 } else {
4050                         $to_name = undef;
4051                 }
4052
4053                 # check if current patch belong to current raw line
4054                 # and parse raw git-diff line if needed
4055                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4056                         # this is continuation of a split patch
4057                         print "<div class=\"patch cont\">\n";
4058                 } else {
4059                         # advance raw git-diff output if needed
4060                         $patch_idx++ if defined $diffinfo;
4061
4062                         # read and prepare patch information
4063                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4064
4065                         # compact combined diff output can have some patches skipped
4066                         # find which patch (using pathname of result) we are at now;
4067                         if ($is_combined) {
4068                                 while ($to_name ne $diffinfo->{'to_file'}) {
4069                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4070                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4071                                               "</div>\n";  # class="patch"
4072
4073                                         $patch_idx++;
4074                                         $patch_number++;
4075
4076                                         last if $patch_idx > $#$difftree;
4077                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4078                                 }
4079                         }
4080
4081                         # modifies %from, %to hashes
4082                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4083
4084                         # this is first patch for raw difftree line with $patch_idx index
4085                         # we index @$difftree array from 0, but number patches from 1
4086                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4087                 }
4088
4089                 # git diff header
4090                 #assert($patch_line =~ m/^diff /) if DEBUG;
4091                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4092                 $patch_number++;
4093                 # print "git diff" header
4094                 print format_git_diff_header_line($patch_line, $diffinfo,
4095                                                   \%from, \%to);
4096
4097                 # print extended diff header
4098                 print "<div class=\"diff extended_header\">\n";
4099         EXTENDED_HEADER:
4100                 while ($patch_line = <$fd>) {
4101                         chomp $patch_line;
4102
4103                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4104
4105                         print format_extended_diff_header_line($patch_line, $diffinfo,
4106                                                                \%from, \%to);
4107                 }
4108                 print "</div>\n"; # class="diff extended_header"
4109
4110                 # from-file/to-file diff header
4111                 if (! $patch_line) {
4112                         print "</div>\n"; # class="patch"
4113                         last PATCH;
4114                 }
4115                 next PATCH if ($patch_line =~ m/^diff /);
4116                 #assert($patch_line =~ m/^---/) if DEBUG;
4117
4118                 my $last_patch_line = $patch_line;
4119                 $patch_line = <$fd>;
4120                 chomp $patch_line;
4121                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4122
4123                 print format_diff_from_to_header($last_patch_line, $patch_line,
4124                                                  $diffinfo, \%from, \%to,
4125                                                  @hash_parents);
4126
4127                 # the patch itself
4128         LINE:
4129                 while ($patch_line = <$fd>) {
4130                         chomp $patch_line;
4131
4132                         next PATCH if ($patch_line =~ m/^diff /);
4133
4134                         print format_diff_line($patch_line, \%from, \%to);
4135                 }
4136
4137         } continue {
4138                 print "</div>\n"; # class="patch"
4139         }
4140
4141         # for compact combined (--cc) format, with chunk and patch simpliciaction
4142         # patchset might be empty, but there might be unprocessed raw lines
4143         for (++$patch_idx if $patch_number > 0;
4144              $patch_idx < @$difftree;
4145              ++$patch_idx) {
4146                 # read and prepare patch information
4147                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4148
4149                 # generate anchor for "patch" links in difftree / whatchanged part
4150                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4151                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4152                       "</div>\n";  # class="patch"
4153
4154                 $patch_number++;
4155         }
4156
4157         if ($patch_number == 0) {
4158                 if (@hash_parents > 1) {
4159                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4160                 } else {
4161                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4162                 }
4163         }
4164
4165         print "</div>\n"; # class="patchset"
4166 }
4167
4168 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4169
4170 # fills project list info (age, description, owner, forks) for each
4171 # project in the list, removing invalid projects from returned list
4172 # NOTE: modifies $projlist, but does not remove entries from it
4173 sub fill_project_list_info {
4174         my ($projlist, $check_forks) = @_;
4175         my @projects;
4176
4177         my $show_ctags = gitweb_check_feature('ctags');
4178  PROJECT:
4179         foreach my $pr (@$projlist) {
4180                 my (@activity) = git_get_last_activity($pr->{'path'});
4181                 unless (@activity) {
4182                         next PROJECT;
4183                 }
4184                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4185                 if (!defined $pr->{'descr'}) {
4186                         my $descr = git_get_project_description($pr->{'path'}) || "";
4187                         $descr = to_utf8($descr);
4188                         $pr->{'descr_long'} = $descr;
4189                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4190                 }
4191                 if (!defined $pr->{'owner'}) {
4192                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4193                 }
4194                 if ($check_forks) {
4195                         my $pname = $pr->{'path'};
4196                         if (($pname =~ s/\.git$//) &&
4197                             ($pname !~ /\/$/) &&
4198                             (-d "$projectroot/$pname")) {
4199                                 $pr->{'forks'} = "-d $projectroot/$pname";
4200                         } else {
4201                                 $pr->{'forks'} = 0;
4202                         }
4203                 }
4204                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4205                 push @projects, $pr;
4206         }
4207
4208         return @projects;
4209 }
4210
4211 # print 'sort by' <th> element, generating 'sort by $name' replay link
4212 # if that order is not selected
4213 sub print_sort_th {
4214         my ($name, $order, $header) = @_;
4215         $header ||= ucfirst($name);
4216
4217         if ($order eq $name) {
4218                 print "<th>$header</th>\n";
4219         } else {
4220                 print "<th>" .
4221                       $cgi->a({-href => href(-replay=>1, order=>$name),
4222                                -class => "header"}, $header) .
4223                       "</th>\n";
4224         }
4225 }
4226
4227 sub git_project_list_body {
4228         # actually uses global variable $project
4229         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4230
4231         my $check_forks = gitweb_check_feature('forks');
4232         my @projects = fill_project_list_info($projlist, $check_forks);
4233
4234         $order ||= $default_projects_order;
4235         $from = 0 unless defined $from;
4236         $to = $#projects if (!defined $to || $#projects < $to);
4237
4238         my %order_info = (
4239                 project => { key => 'path', type => 'str' },
4240                 descr => { key => 'descr_long', type => 'str' },
4241                 owner => { key => 'owner', type => 'str' },
4242                 age => { key => 'age', type => 'num' }
4243         );
4244         my $oi = $order_info{$order};
4245         if ($oi->{'type'} eq 'str') {
4246                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4247         } else {
4248                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4249         }
4250
4251         my $show_ctags = gitweb_check_feature('ctags');
4252         if ($show_ctags) {
4253                 my %ctags;
4254                 foreach my $p (@projects) {
4255                         foreach my $ct (keys %{$p->{'ctags'}}) {
4256                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4257                         }
4258                 }
4259                 my $cloud = git_populate_project_tagcloud(\%ctags);
4260                 print git_show_project_tagcloud($cloud, 64);
4261         }
4262
4263         print "<table class=\"project_list\">\n";
4264         unless ($no_header) {
4265                 print "<tr>\n";
4266                 if ($check_forks) {
4267                         print "<th></th>\n";
4268                 }
4269                 print_sort_th('project', $order, 'Project');
4270                 print_sort_th('descr', $order, 'Description');
4271                 print_sort_th('owner', $order, 'Owner');
4272                 print_sort_th('age', $order, 'Last Change');
4273                 print "<th></th>\n" . # for links
4274                       "</tr>\n";
4275         }
4276         my $alternate = 1;
4277         my $tagfilter = $cgi->param('by_tag');
4278         for (my $i = $from; $i <= $to; $i++) {
4279                 my $pr = $projects[$i];
4280
4281                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4282                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4283                         and not $pr->{'descr_long'} =~ /$searchtext/;
4284                 # Weed out forks or non-matching entries of search
4285                 if ($check_forks) {
4286                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4287                         $forkbase="^$forkbase" if $forkbase;
4288                         next if not $searchtext and not $tagfilter and $show_ctags
4289                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4290                 }
4291
4292                 if ($alternate) {
4293                         print "<tr class=\"dark\">\n";
4294                 } else {
4295                         print "<tr class=\"light\">\n";
4296                 }
4297                 $alternate ^= 1;
4298                 if ($check_forks) {
4299                         print "<td>";
4300                         if ($pr->{'forks'}) {
4301                                 print "<!-- $pr->{'forks'} -->\n";
4302                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4303                         }
4304                         print "</td>\n";
4305                 }
4306                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4307                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4308                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4309                                         -class => "list", -title => $pr->{'descr_long'}},
4310                                         esc_html($pr->{'descr'})) . "</td>\n" .
4311                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4312                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4313                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4314                       "<td class=\"link\">" .
4315                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4316                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4317                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4318                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4319                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4320                       "</td>\n" .
4321                       "</tr>\n";
4322         }
4323         if (defined $extra) {
4324                 print "<tr>\n";
4325                 if ($check_forks) {
4326                         print "<td></td>\n";
4327                 }
4328                 print "<td colspan=\"5\">$extra</td>\n" .
4329                       "</tr>\n";
4330         }
4331         print "</table>\n";
4332 }
4333
4334 sub git_shortlog_body {
4335         # uses global variable $project
4336         my ($commitlist, $from, $to, $refs, $extra) = @_;
4337
4338         $from = 0 unless defined $from;
4339         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4340
4341         print "<table class=\"shortlog\">\n";
4342         my $alternate = 1;
4343         for (my $i = $from; $i <= $to; $i++) {
4344                 my %co = %{$commitlist->[$i]};
4345                 my $commit = $co{'id'};
4346                 my $ref = format_ref_marker($refs, $commit);
4347                 if ($alternate) {
4348                         print "<tr class=\"dark\">\n";
4349                 } else {
4350                         print "<tr class=\"light\">\n";
4351                 }
4352                 $alternate ^= 1;
4353                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4354                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4355                       format_author_html('td', \%co, 10) . "<td>";
4356                 print format_subject_html($co{'title'}, $co{'title_short'},
4357                                           href(action=>"commit", hash=>$commit), $ref);
4358                 print "</td>\n" .
4359                       "<td class=\"link\">" .
4360                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4361                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4362                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4363                 my $snapshot_links = format_snapshot_links($commit);
4364                 if (defined $snapshot_links) {
4365                         print " | " . $snapshot_links;
4366                 }
4367                 print "</td>\n" .
4368                       "</tr>\n";
4369         }
4370         if (defined $extra) {
4371                 print "<tr>\n" .
4372                       "<td colspan=\"4\">$extra</td>\n" .
4373                       "</tr>\n";
4374         }
4375         print "</table>\n";
4376 }
4377
4378 sub git_history_body {
4379         # Warning: assumes constant type (blob or tree) during history
4380         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4381
4382         $from = 0 unless defined $from;
4383         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4384
4385         print "<table class=\"history\">\n";
4386         my $alternate = 1;
4387         for (my $i = $from; $i <= $to; $i++) {
4388                 my %co = %{$commitlist->[$i]};
4389                 if (!%co) {
4390                         next;
4391                 }
4392                 my $commit = $co{'id'};
4393
4394                 my $ref = format_ref_marker($refs, $commit);
4395
4396                 if ($alternate) {
4397                         print "<tr class=\"dark\">\n";
4398                 } else {
4399                         print "<tr class=\"light\">\n";
4400                 }
4401                 $alternate ^= 1;
4402                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4403         # shortlog:   format_author_html('td', \%co, 10)
4404                       format_author_html('td', \%co, 15, 3) . "<td>";
4405                 # originally git_history used chop_str($co{'title'}, 50)
4406                 print format_subject_html($co{'title'}, $co{'title_short'},
4407                                           href(action=>"commit", hash=>$commit), $ref);
4408                 print "</td>\n" .
4409                       "<td class=\"link\">" .
4410                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4411                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4412
4413                 if ($ftype eq 'blob') {
4414                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4415                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4416                         if (defined $blob_current && defined $blob_parent &&
4417                                         $blob_current ne $blob_parent) {
4418                                 print " | " .
4419                                         $cgi->a({-href => href(action=>"blobdiff",
4420                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4421                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4422                                                                file_name=>$file_name)},
4423                                                 "diff to current");
4424                         }
4425                 }
4426                 print "</td>\n" .
4427                       "</tr>\n";
4428         }
4429         if (defined $extra) {
4430                 print "<tr>\n" .
4431                       "<td colspan=\"4\">$extra</td>\n" .
4432                       "</tr>\n";
4433         }
4434         print "</table>\n";
4435 }
4436
4437 sub git_tags_body {
4438         # uses global variable $project
4439         my ($taglist, $from, $to, $extra) = @_;
4440         $from = 0 unless defined $from;
4441         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4442
4443         print "<table class=\"tags\">\n";
4444         my $alternate = 1;
4445         for (my $i = $from; $i <= $to; $i++) {
4446                 my $entry = $taglist->[$i];
4447                 my %tag = %$entry;
4448                 my $comment = $tag{'subject'};
4449                 my $comment_short;
4450                 if (defined $comment) {
4451                         $comment_short = chop_str($comment, 30, 5);
4452                 }
4453                 if ($alternate) {
4454                         print "<tr class=\"dark\">\n";
4455                 } else {
4456                         print "<tr class=\"light\">\n";
4457                 }
4458                 $alternate ^= 1;
4459                 if (defined $tag{'age'}) {
4460                         print "<td><i>$tag{'age'}</i></td>\n";
4461                 } else {
4462                         print "<td></td>\n";
4463                 }
4464                 print "<td>" .
4465                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4466                                -class => "list name"}, esc_html($tag{'name'})) .
4467                       "</td>\n" .
4468                       "<td>";
4469                 if (defined $comment) {
4470                         print format_subject_html($comment, $comment_short,
4471                                                   href(action=>"tag", hash=>$tag{'id'}));
4472                 }
4473                 print "</td>\n" .
4474                       "<td class=\"selflink\">";
4475                 if ($tag{'type'} eq "tag") {
4476                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4477                 } else {
4478                         print "&nbsp;";
4479                 }
4480                 print "</td>\n" .
4481                       "<td class=\"link\">" . " | " .
4482                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4483                 if ($tag{'reftype'} eq "commit") {
4484                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4485                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4486                 } elsif ($tag{'reftype'} eq "blob") {
4487                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4488                 }
4489                 print "</td>\n" .
4490                       "</tr>";
4491         }
4492         if (defined $extra) {
4493                 print "<tr>\n" .
4494                       "<td colspan=\"5\">$extra</td>\n" .
4495                       "</tr>\n";
4496         }
4497         print "</table>\n";
4498 }
4499
4500 sub git_heads_body {
4501         # uses global variable $project
4502         my ($headlist, $head, $from, $to, $extra) = @_;
4503         $from = 0 unless defined $from;
4504         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4505
4506         print "<table class=\"heads\">\n";
4507         my $alternate = 1;
4508         for (my $i = $from; $i <= $to; $i++) {
4509                 my $entry = $headlist->[$i];
4510                 my %ref = %$entry;
4511                 my $curr = $ref{'id'} eq $head;
4512                 if ($alternate) {
4513                         print "<tr class=\"dark\">\n";
4514                 } else {
4515                         print "<tr class=\"light\">\n";
4516                 }
4517                 $alternate ^= 1;
4518                 print "<td><i>$ref{'age'}</i></td>\n" .
4519                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4520                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4521                                -class => "list name"},esc_html($ref{'name'})) .
4522                       "</td>\n" .
4523                       "<td class=\"link\">" .
4524                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4525                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4526                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4527                       "</td>\n" .
4528                       "</tr>";
4529         }
4530         if (defined $extra) {
4531                 print "<tr>\n" .
4532                       "<td colspan=\"3\">$extra</td>\n" .
4533                       "</tr>\n";
4534         }
4535         print "</table>\n";
4536 }
4537
4538 sub git_search_grep_body {
4539         my ($commitlist, $from, $to, $extra) = @_;
4540         $from = 0 unless defined $from;
4541         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4542
4543         print "<table class=\"commit_search\">\n";
4544         my $alternate = 1;
4545         for (my $i = $from; $i <= $to; $i++) {
4546                 my %co = %{$commitlist->[$i]};
4547                 if (!%co) {
4548                         next;
4549                 }
4550                 my $commit = $co{'id'};
4551                 if ($alternate) {
4552                         print "<tr class=\"dark\">\n";
4553                 } else {
4554                         print "<tr class=\"light\">\n";
4555                 }
4556                 $alternate ^= 1;
4557                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4558                       format_author_html('td', \%co, 15, 5) .
4559                       "<td>" .
4560                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4561                                -class => "list subject"},
4562                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4563                 my $comment = $co{'comment'};
4564                 foreach my $line (@$comment) {
4565                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4566                                 my ($lead, $match, $trail) = ($1, $2, $3);
4567                                 $match = chop_str($match, 70, 5, 'center');
4568                                 my $contextlen = int((80 - length($match))/2);
4569                                 $contextlen = 30 if ($contextlen > 30);
4570                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4571                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4572
4573                                 $lead  = esc_html($lead);
4574                                 $match = esc_html($match);
4575                                 $trail = esc_html($trail);
4576
4577                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4578                         }
4579                 }
4580                 print "</td>\n" .
4581                       "<td class=\"link\">" .
4582                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4583                       " | " .
4584                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4585                       " | " .
4586                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4587                 print "</td>\n" .
4588                       "</tr>\n";
4589         }
4590         if (defined $extra) {
4591                 print "<tr>\n" .
4592                       "<td colspan=\"3\">$extra</td>\n" .
4593                       "</tr>\n";
4594         }
4595         print "</table>\n";
4596 }
4597
4598 ## ======================================================================
4599 ## ======================================================================
4600 ## actions
4601
4602 sub git_project_list {
4603         my $order = $input_params{'order'};
4604         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4605                 die_error(400, "Unknown order parameter");
4606         }
4607
4608         my @list = git_get_projects_list();
4609         if (!@list) {
4610                 die_error(404, "No projects found");
4611         }
4612
4613         git_header_html();
4614         if (-f $home_text) {
4615                 print "<div class=\"index_include\">\n";
4616                 insert_file($home_text);
4617                 print "</div>\n";
4618         }
4619         print $cgi->startform(-method => "get") .
4620               "<p class=\"projsearch\">Search:\n" .
4621               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4622               "</p>" .
4623               $cgi->end_form() . "\n";
4624         git_project_list_body(\@list, $order);
4625         git_footer_html();
4626 }
4627
4628 sub git_forks {
4629         my $order = $input_params{'order'};
4630         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4631                 die_error(400, "Unknown order parameter");
4632         }
4633
4634         my @list = git_get_projects_list($project);
4635         if (!@list) {
4636                 die_error(404, "No forks found");
4637         }
4638
4639         git_header_html();
4640         git_print_page_nav('','');
4641         git_print_header_div('summary', "$project forks");
4642         git_project_list_body(\@list, $order);
4643         git_footer_html();
4644 }
4645
4646 sub git_project_index {
4647         my @projects = git_get_projects_list($project);
4648
4649         print $cgi->header(
4650                 -type => 'text/plain',
4651                 -charset => 'utf-8',
4652                 -content_disposition => 'inline; filename="index.aux"');
4653
4654         foreach my $pr (@projects) {
4655                 if (!exists $pr->{'owner'}) {
4656                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4657                 }
4658
4659                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4660                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4661                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4662                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4663                 $path  =~ s/ /\+/g;
4664                 $owner =~ s/ /\+/g;
4665
4666                 print "$path $owner\n";
4667         }
4668 }
4669
4670 sub git_summary {
4671         my $descr = git_get_project_description($project) || "none";
4672         my %co = parse_commit("HEAD");
4673         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4674         my $head = $co{'id'};
4675
4676         my $owner = git_get_project_owner($project);
4677
4678         my $refs = git_get_references();
4679         # These get_*_list functions return one more to allow us to see if
4680         # there are more ...
4681         my @taglist  = git_get_tags_list(16);
4682         my @headlist = git_get_heads_list(16);
4683         my @forklist;
4684         my $check_forks = gitweb_check_feature('forks');
4685
4686         if ($check_forks) {
4687                 @forklist = git_get_projects_list($project);
4688         }
4689
4690         git_header_html();
4691         git_print_page_nav('summary','', $head);
4692
4693         print "<div class=\"title\">&nbsp;</div>\n";
4694         print "<table class=\"projects_list\">\n" .
4695               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4696               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4697         if (defined $cd{'rfc2822'}) {
4698                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4699         }
4700
4701         # use per project git URL list in $projectroot/$project/cloneurl
4702         # or make project git URL from git base URL and project name
4703         my $url_tag = "URL";
4704         my @url_list = git_get_project_url_list($project);
4705         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4706         foreach my $git_url (@url_list) {
4707                 next unless $git_url;
4708                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4709                 $url_tag = "";
4710         }
4711
4712         # Tag cloud
4713         my $show_ctags = gitweb_check_feature('ctags');
4714         if ($show_ctags) {
4715                 my $ctags = git_get_project_ctags($project);
4716                 my $cloud = git_populate_project_tagcloud($ctags);
4717                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4718                 print "</td>\n<td>" unless %$ctags;
4719                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4720                 print "</td>\n<td>" if %$ctags;
4721                 print git_show_project_tagcloud($cloud, 48);
4722                 print "</td></tr>";
4723         }
4724
4725         print "</table>\n";
4726
4727         # If XSS prevention is on, we don't include README.html.
4728         # TODO: Allow a readme in some safe format.
4729         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4730                 print "<div class=\"title\">readme</div>\n" .
4731                       "<div class=\"readme\">\n";
4732                 insert_file("$projectroot/$project/README.html");
4733                 print "\n</div>\n"; # class="readme"
4734         }
4735
4736         # we need to request one more than 16 (0..15) to check if
4737         # those 16 are all
4738         my @commitlist = $head ? parse_commits($head, 17) : ();
4739         if (@commitlist) {
4740                 git_print_header_div('shortlog');
4741                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4742                                   $#commitlist <=  15 ? undef :
4743                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4744         }
4745
4746         if (@taglist) {
4747                 git_print_header_div('tags');
4748                 git_tags_body(\@taglist, 0, 15,
4749                               $#taglist <=  15 ? undef :
4750                               $cgi->a({-href => href(action=>"tags")}, "..."));
4751         }
4752
4753         if (@headlist) {
4754                 git_print_header_div('heads');
4755                 git_heads_body(\@headlist, $head, 0, 15,
4756                                $#headlist <= 15 ? undef :
4757                                $cgi->a({-href => href(action=>"heads")}, "..."));
4758         }
4759
4760         if (@forklist) {
4761                 git_print_header_div('forks');
4762                 git_project_list_body(\@forklist, 'age', 0, 15,
4763                                       $#forklist <= 15 ? undef :
4764                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4765                                       'no_header');
4766         }
4767
4768         git_footer_html();
4769 }
4770
4771 sub git_tag {
4772         my $head = git_get_head_hash($project);
4773         git_header_html();
4774         git_print_page_nav('','', $head,undef,$head);
4775         my %tag = parse_tag($hash);
4776
4777         if (! %tag) {
4778                 die_error(404, "Unknown tag object");
4779         }
4780
4781         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4782         print "<div class=\"title_text\">\n" .
4783               "<table class=\"object_header\">\n" .
4784               "<tr>\n" .
4785               "<td>object</td>\n" .
4786               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4787                                $tag{'object'}) . "</td>\n" .
4788               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4789                                               $tag{'type'}) . "</td>\n" .
4790               "</tr>\n";
4791         if (defined($tag{'author'})) {
4792                 git_print_authorship_rows(\%tag, 'author');
4793         }
4794         print "</table>\n\n" .
4795               "</div>\n";
4796         print "<div class=\"page_body\">";
4797         my $comment = $tag{'comment'};
4798         foreach my $line (@$comment) {
4799                 chomp $line;
4800                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4801         }
4802         print "</div>\n";
4803         git_footer_html();
4804 }
4805
4806 sub git_blame {
4807         # permissions
4808         gitweb_check_feature('blame')
4809                 or die_error(403, "Blame view not allowed");
4810
4811         # error checking
4812         die_error(400, "No file name given") unless $file_name;
4813         $hash_base ||= git_get_head_hash($project);
4814         die_error(404, "Couldn't find base commit") unless $hash_base;
4815         my %co = parse_commit($hash_base)
4816                 or die_error(404, "Commit not found");
4817         my $ftype = "blob";
4818         if (!defined $hash) {
4819                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4820                         or die_error(404, "Error looking up file");
4821         } else {
4822                 $ftype = git_get_type($hash);
4823                 if ($ftype !~ "blob") {
4824                         die_error(400, "Object is not a blob");
4825                 }
4826         }
4827
4828         # run git-blame --porcelain
4829         open my $fd, "-|", git_cmd(), "blame", '-p',
4830                 $hash_base, '--', $file_name
4831                 or die_error(500, "Open git-blame failed");
4832
4833         # page header
4834         git_header_html();
4835         my $formats_nav =
4836                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4837                         "blob") .
4838                 " | " .
4839                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4840                         "history") .
4841                 " | " .
4842                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4843                         "HEAD");
4844         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4845         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4846         git_print_page_path($file_name, $ftype, $hash_base);
4847
4848         # page body
4849         my @rev_color = qw(light dark);
4850         my $num_colors = scalar(@rev_color);
4851         my $current_color = 0;
4852         my %metainfo = ();
4853
4854         print <<HTML;
4855 <div class="page_body">
4856 <table class="blame">
4857 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4858 HTML
4859  LINE:
4860         while (my $line = <$fd>) {
4861                 chomp $line;
4862                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4863                 # no <lines in group> for subsequent lines in group of lines
4864                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4865                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4866                 if (!exists $metainfo{$full_rev}) {
4867                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4868                 }
4869                 my $meta = $metainfo{$full_rev};
4870                 my $data;
4871                 while ($data = <$fd>) {
4872                         chomp $data;
4873                         last if ($data =~ s/^\t//); # contents of line
4874                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4875                                 $meta->{$1} = $2 unless exists $meta->{$1};
4876                         }
4877                         if ($data =~ /^previous /) {
4878                                 $meta->{'nprevious'}++;
4879                         }
4880                 }
4881                 my $short_rev = substr($full_rev, 0, 8);
4882                 my $author = $meta->{'author'};
4883                 my %date =
4884                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4885                 my $date = $date{'iso-tz'};
4886                 if ($group_size) {
4887                         $current_color = ($current_color + 1) % $num_colors;
4888                 }
4889                 my $tr_class = $rev_color[$current_color];
4890                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4891                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4892                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4893                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4894                 if ($group_size) {
4895                         print "<td class=\"sha1\"";
4896                         print " title=\"". esc_html($author) . ", $date\"";
4897                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4898                         print ">";
4899                         print $cgi->a({-href => href(action=>"commit",
4900                                                      hash=>$full_rev,
4901                                                      file_name=>$file_name)},
4902                                       esc_html($short_rev));
4903                         if ($group_size >= 2) {
4904                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4905                                 if (@author_initials) {
4906                                         print "<br />" .
4907                                               esc_html(join('', @author_initials));
4908                                         #           or join('.', ...)
4909                                 }
4910                         }
4911                         print "</td>\n";
4912                 }
4913                 # 'previous' <sha1 of parent commit> <filename at commit>
4914                 if (exists $meta->{'previous'} &&
4915                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4916                         $meta->{'parent'} = $1;
4917                         $meta->{'file_parent'} = unquote($2);
4918                 }
4919                 my $linenr_commit =
4920                         exists($meta->{'parent'}) ?
4921                         $meta->{'parent'} : $full_rev;
4922                 my $linenr_filename =
4923                         exists($meta->{'file_parent'}) ?
4924                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4925                 my $blamed = href(action => 'blame',
4926                                   file_name => $linenr_filename,
4927                                   hash_base => $linenr_commit);
4928                 print "<td class=\"linenr\">";
4929                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4930                                 -class => "linenr" },
4931                               esc_html($lineno));
4932                 print "</td>";
4933                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4934                 print "</tr>\n";
4935         }
4936         print "</table>\n";
4937         print "</div>";
4938         close $fd
4939                 or print "Reading blob failed\n";
4940
4941         # page footer
4942         git_footer_html();
4943 }
4944
4945 sub git_tags {
4946         my $head = git_get_head_hash($project);
4947         git_header_html();
4948         git_print_page_nav('','', $head,undef,$head);
4949         git_print_header_div('summary', $project);
4950
4951         my @tagslist = git_get_tags_list();
4952         if (@tagslist) {
4953                 git_tags_body(\@tagslist);
4954         }
4955         git_footer_html();
4956 }
4957
4958 sub git_heads {
4959         my $head = git_get_head_hash($project);
4960         git_header_html();
4961         git_print_page_nav('','', $head,undef,$head);
4962         git_print_header_div('summary', $project);
4963
4964         my @headslist = git_get_heads_list();
4965         if (@headslist) {
4966                 git_heads_body(\@headslist, $head);
4967         }
4968         git_footer_html();
4969 }
4970
4971 sub git_blob_plain {
4972         my $type = shift;
4973         my $expires;
4974
4975         if (!defined $hash) {
4976                 if (defined $file_name) {
4977                         my $base = $hash_base || git_get_head_hash($project);
4978                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4979                                 or die_error(404, "Cannot find file");
4980                 } else {
4981                         die_error(400, "No file name defined");
4982                 }
4983         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4984                 # blobs defined by non-textual hash id's can be cached
4985                 $expires = "+1d";
4986         }
4987
4988         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4989                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4990
4991         # content-type (can include charset)
4992         $type = blob_contenttype($fd, $file_name, $type);
4993
4994         # "save as" filename, even when no $file_name is given
4995         my $save_as = "$hash";
4996         if (defined $file_name) {
4997                 $save_as = $file_name;
4998         } elsif ($type =~ m/^text\//) {
4999                 $save_as .= '.txt';
5000         }
5001
5002         # With XSS prevention on, blobs of all types except a few known safe
5003         # ones are served with "Content-Disposition: attachment" to make sure
5004         # they don't run in our security domain.  For certain image types,
5005         # blob view writes an <img> tag referring to blob_plain view, and we
5006         # want to be sure not to break that by serving the image as an
5007         # attachment (though Firefox 3 doesn't seem to care).
5008         my $sandbox = $prevent_xss &&
5009                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5010
5011         print $cgi->header(
5012                 -type => $type,
5013                 -expires => $expires,
5014                 -content_disposition =>
5015                         ($sandbox ? 'attachment' : 'inline')
5016                         . '; filename="' . $save_as . '"');
5017         local $/ = undef;
5018         binmode STDOUT, ':raw';
5019         print <$fd>;
5020         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5021         close $fd;
5022 }
5023
5024 sub git_blob {
5025         my $expires;
5026
5027         if (!defined $hash) {
5028                 if (defined $file_name) {
5029                         my $base = $hash_base || git_get_head_hash($project);
5030                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5031                                 or die_error(404, "Cannot find file");
5032                 } else {
5033                         die_error(400, "No file name defined");
5034                 }
5035         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5036                 # blobs defined by non-textual hash id's can be cached
5037                 $expires = "+1d";
5038         }
5039
5040         my $have_blame = gitweb_check_feature('blame');
5041         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5042                 or die_error(500, "Couldn't cat $file_name, $hash");
5043         my $mimetype = blob_mimetype($fd, $file_name);
5044         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5045                 close $fd;
5046                 return git_blob_plain($mimetype);
5047         }
5048         # we can have blame only for text/* mimetype
5049         $have_blame &&= ($mimetype =~ m!^text/!);
5050
5051         git_header_html(undef, $expires);
5052         my $formats_nav = '';
5053         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5054                 if (defined $file_name) {
5055                         if ($have_blame) {
5056                                 $formats_nav .=
5057                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5058                                                 "blame") .
5059                                         " | ";
5060                         }
5061                         $formats_nav .=
5062                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5063                                         "history") .
5064                                 " | " .
5065                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5066                                         "raw") .
5067                                 " | " .
5068                                 $cgi->a({-href => href(action=>"blob",
5069                                                        hash_base=>"HEAD", file_name=>$file_name)},
5070                                         "HEAD");
5071                 } else {
5072                         $formats_nav .=
5073                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5074                                         "raw");
5075                 }
5076                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5077                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5078         } else {
5079                 print "<div class=\"page_nav\">\n" .
5080                       "<br/><br/></div>\n" .
5081                       "<div class=\"title\">$hash</div>\n";
5082         }
5083         git_print_page_path($file_name, "blob", $hash_base);
5084         print "<div class=\"page_body\">\n";
5085         if ($mimetype =~ m!^image/!) {
5086                 print qq!<img type="$mimetype"!;
5087                 if ($file_name) {
5088                         print qq! alt="$file_name" title="$file_name"!;
5089                 }
5090                 print qq! src="! .
5091                       href(action=>"blob_plain", hash=>$hash,
5092                            hash_base=>$hash_base, file_name=>$file_name) .
5093                       qq!" />\n!;
5094         } else {
5095                 my $nr;
5096                 while (my $line = <$fd>) {
5097                         chomp $line;
5098                         $nr++;
5099                         $line = untabify($line);
5100                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5101                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5102                 }
5103         }
5104         close $fd
5105                 or print "Reading blob failed.\n";
5106         print "</div>";
5107         git_footer_html();
5108 }
5109
5110 sub git_tree {
5111         if (!defined $hash_base) {
5112                 $hash_base = "HEAD";
5113         }
5114         if (!defined $hash) {
5115                 if (defined $file_name) {
5116                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5117                 } else {
5118                         $hash = $hash_base;
5119                 }
5120         }
5121         die_error(404, "No such tree") unless defined($hash);
5122
5123         my $show_sizes = gitweb_check_feature('show-sizes');
5124         my $have_blame = gitweb_check_feature('blame');
5125
5126         my @entries = ();
5127         {
5128                 local $/ = "\0";
5129                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5130                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5131                         or die_error(500, "Open git-ls-tree failed");
5132                 @entries = map { chomp; $_ } <$fd>;
5133                 close $fd
5134                         or die_error(404, "Reading tree failed");
5135         }
5136
5137         my $refs = git_get_references();
5138         my $ref = format_ref_marker($refs, $hash_base);
5139         git_header_html();
5140         my $basedir = '';
5141         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5142                 my @views_nav = ();
5143                 if (defined $file_name) {
5144                         push @views_nav,
5145                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5146                                         "history"),
5147                                 $cgi->a({-href => href(action=>"tree",
5148                                                        hash_base=>"HEAD", file_name=>$file_name)},
5149                                         "HEAD"),
5150                 }
5151                 my $snapshot_links = format_snapshot_links($hash);
5152                 if (defined $snapshot_links) {
5153                         # FIXME: Should be available when we have no hash base as well.
5154                         push @views_nav, $snapshot_links;
5155                 }
5156                 git_print_page_nav('tree','', $hash_base, undef, undef,
5157                                    join(' | ', @views_nav));
5158                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5159         } else {
5160                 undef $hash_base;
5161                 print "<div class=\"page_nav\">\n";
5162                 print "<br/><br/></div>\n";
5163                 print "<div class=\"title\">$hash</div>\n";
5164         }
5165         if (defined $file_name) {
5166                 $basedir = $file_name;
5167                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5168                         $basedir .= '/';
5169                 }
5170                 git_print_page_path($file_name, 'tree', $hash_base);
5171         }
5172         print "<div class=\"page_body\">\n";
5173         print "<table class=\"tree\">\n";
5174         my $alternate = 1;
5175         # '..' (top directory) link if possible
5176         if (defined $hash_base &&
5177             defined $file_name && $file_name =~ m![^/]+$!) {
5178                 if ($alternate) {
5179                         print "<tr class=\"dark\">\n";
5180                 } else {
5181                         print "<tr class=\"light\">\n";
5182                 }
5183                 $alternate ^= 1;
5184
5185                 my $up = $file_name;
5186                 $up =~ s!/?[^/]+$!!;
5187                 undef $up unless $up;
5188                 # based on git_print_tree_entry
5189                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5190                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5191                 print '<td class="list">';
5192                 print $cgi->a({-href => href(action=>"tree",
5193                                              hash_base=>$hash_base,
5194                                              file_name=>$up)},
5195                               "..");
5196                 print "</td>\n";
5197                 print "<td class=\"link\"></td>\n";
5198
5199                 print "</tr>\n";
5200         }
5201         foreach my $line (@entries) {
5202                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5203
5204                 if ($alternate) {
5205                         print "<tr class=\"dark\">\n";
5206                 } else {
5207                         print "<tr class=\"light\">\n";
5208                 }
5209                 $alternate ^= 1;
5210
5211                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5212
5213                 print "</tr>\n";
5214         }
5215         print "</table>\n" .
5216               "</div>";
5217         git_footer_html();
5218 }
5219
5220 sub git_snapshot {
5221         my $format = $input_params{'snapshot_format'};
5222         if (!@snapshot_fmts) {
5223                 die_error(403, "Snapshots not allowed");
5224         }
5225         # default to first supported snapshot format
5226         $format ||= $snapshot_fmts[0];
5227         if ($format !~ m/^[a-z0-9]+$/) {
5228                 die_error(400, "Invalid snapshot format parameter");
5229         } elsif (!exists($known_snapshot_formats{$format})) {
5230                 die_error(400, "Unknown snapshot format");
5231         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5232                 die_error(403, "Snapshot format not allowed");
5233         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5234                 die_error(403, "Unsupported snapshot format");
5235         }
5236
5237         if (!defined $hash) {
5238                 $hash = git_get_head_hash($project);
5239         }
5240
5241         my $name = $project;
5242         $name =~ s,([^/])/*\.git$,$1,;
5243         $name = basename($name);
5244         my $filename = to_utf8($name);
5245         $name =~ s/\047/\047\\\047\047/g;
5246         my $cmd;
5247         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5248         $cmd = quote_command(
5249                 git_cmd(), 'archive',
5250                 "--format=$known_snapshot_formats{$format}{'format'}",
5251                 "--prefix=$name/", $hash);
5252         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5253                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5254         }
5255
5256         print $cgi->header(
5257                 -type => $known_snapshot_formats{$format}{'type'},
5258                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5259                 -status => '200 OK');
5260
5261         open my $fd, "-|", $cmd
5262                 or die_error(500, "Execute git-archive failed");
5263         binmode STDOUT, ':raw';
5264         print <$fd>;
5265         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5266         close $fd;
5267 }
5268
5269 sub git_log {
5270         my $head = git_get_head_hash($project);
5271         if (!defined $hash) {
5272                 $hash = $head;
5273         }
5274         if (!defined $page) {
5275                 $page = 0;
5276         }
5277         my $refs = git_get_references();
5278
5279         my @commitlist = parse_commits($hash, 101, (100 * $page));
5280
5281         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5282
5283         my ($patch_max) = gitweb_get_feature('patches');
5284         if ($patch_max) {
5285                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5286                         $paging_nav .= " &sdot; " .
5287                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5288                                         "patches");
5289                 }
5290         }
5291
5292         git_header_html();
5293         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5294
5295         if (!@commitlist) {
5296                 my %co = parse_commit($hash);
5297
5298                 git_print_header_div('summary', $project);
5299                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5300         }
5301         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5302         for (my $i = 0; $i <= $to; $i++) {
5303                 my %co = %{$commitlist[$i]};
5304                 next if !%co;
5305                 my $commit = $co{'id'};
5306                 my $ref = format_ref_marker($refs, $commit);
5307                 my %ad = parse_date($co{'author_epoch'});
5308                 git_print_header_div('commit',
5309                                "<span class=\"age\">$co{'age_string'}</span>" .
5310                                esc_html($co{'title'}) . $ref,
5311                                $commit);
5312                 print "<div class=\"title_text\">\n" .
5313                       "<div class=\"log_link\">\n" .
5314                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5315                       " | " .
5316                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5317                       " | " .
5318                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5319                       "<br/>\n" .
5320                       "</div>\n";
5321                       git_print_authorship(\%co, -tag => 'span');
5322                       print "<br/>\n</div>\n";
5323
5324                 print "<div class=\"log_body\">\n";
5325                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5326                 print "</div>\n";
5327         }
5328         if ($#commitlist >= 100) {
5329                 print "<div class=\"page_nav\">\n";
5330                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5331                                -accesskey => "n", -title => "Alt-n"}, "next");
5332                 print "</div>\n";
5333         }
5334         git_footer_html();
5335 }
5336
5337 sub git_commit {
5338         $hash ||= $hash_base || "HEAD";
5339         my %co = parse_commit($hash)
5340             or die_error(404, "Unknown commit object");
5341
5342         my $parent  = $co{'parent'};
5343         my $parents = $co{'parents'}; # listref
5344
5345         # we need to prepare $formats_nav before any parameter munging
5346         my $formats_nav;
5347         if (!defined $parent) {
5348                 # --root commitdiff
5349                 $formats_nav .= '(initial)';
5350         } elsif (@$parents == 1) {
5351                 # single parent commit
5352                 $formats_nav .=
5353                         '(parent: ' .
5354                         $cgi->a({-href => href(action=>"commit",
5355                                                hash=>$parent)},
5356                                 esc_html(substr($parent, 0, 7))) .
5357                         ')';
5358         } else {
5359                 # merge commit
5360                 $formats_nav .=
5361                         '(merge: ' .
5362                         join(' ', map {
5363                                 $cgi->a({-href => href(action=>"commit",
5364                                                        hash=>$_)},
5365                                         esc_html(substr($_, 0, 7)));
5366                         } @$parents ) .
5367                         ')';
5368         }
5369         if (gitweb_check_feature('patches') && @$parents <= 1) {
5370                 $formats_nav .= " | " .
5371                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5372                                 "patch");
5373         }
5374
5375         if (!defined $parent) {
5376                 $parent = "--root";
5377         }
5378         my @difftree;
5379         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5380                 @diff_opts,
5381                 (@$parents <= 1 ? $parent : '-c'),
5382                 $hash, "--"
5383                 or die_error(500, "Open git-diff-tree failed");
5384         @difftree = map { chomp; $_ } <$fd>;
5385         close $fd or die_error(404, "Reading git-diff-tree failed");
5386
5387         # non-textual hash id's can be cached
5388         my $expires;
5389         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5390                 $expires = "+1d";
5391         }
5392         my $refs = git_get_references();
5393         my $ref = format_ref_marker($refs, $co{'id'});
5394
5395         git_header_html(undef, $expires);
5396         git_print_page_nav('commit', '',
5397                            $hash, $co{'tree'}, $hash,
5398                            $formats_nav);
5399
5400         if (defined $co{'parent'}) {
5401                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5402         } else {
5403                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5404         }
5405         print "<div class=\"title_text\">\n" .
5406               "<table class=\"object_header\">\n";
5407         git_print_authorship_rows(\%co);
5408         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5409         print "<tr>" .
5410               "<td>tree</td>" .
5411               "<td class=\"sha1\">" .
5412               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5413                        class => "list"}, $co{'tree'}) .
5414               "</td>" .
5415               "<td class=\"link\">" .
5416               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5417                       "tree");
5418         my $snapshot_links = format_snapshot_links($hash);
5419         if (defined $snapshot_links) {
5420                 print " | " . $snapshot_links;
5421         }
5422         print "</td>" .
5423               "</tr>\n";
5424
5425         foreach my $par (@$parents) {
5426                 print "<tr>" .
5427                       "<td>parent</td>" .
5428                       "<td class=\"sha1\">" .
5429                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5430                                class => "list"}, $par) .
5431                       "</td>" .
5432                       "<td class=\"link\">" .
5433                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5434                       " | " .
5435                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5436                       "</td>" .
5437                       "</tr>\n";
5438         }
5439         print "</table>".
5440               "</div>\n";
5441
5442         print "<div class=\"page_body\">\n";
5443         git_print_log($co{'comment'});
5444         print "</div>\n";
5445
5446         git_difftree_body(\@difftree, $hash, @$parents);
5447
5448         git_footer_html();
5449 }
5450
5451 sub git_object {
5452         # object is defined by:
5453         # - hash or hash_base alone
5454         # - hash_base and file_name
5455         my $type;
5456
5457         # - hash or hash_base alone
5458         if ($hash || ($hash_base && !defined $file_name)) {
5459                 my $object_id = $hash || $hash_base;
5460
5461                 open my $fd, "-|", quote_command(
5462                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5463                         or die_error(404, "Object does not exist");
5464                 $type = <$fd>;
5465                 chomp $type;
5466                 close $fd
5467                         or die_error(404, "Object does not exist");
5468
5469         # - hash_base and file_name
5470         } elsif ($hash_base && defined $file_name) {
5471                 $file_name =~ s,/+$,,;
5472
5473                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5474                         or die_error(404, "Base object does not exist");
5475
5476                 # here errors should not hapen
5477                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5478                         or die_error(500, "Open git-ls-tree failed");
5479                 my $line = <$fd>;
5480                 close $fd;
5481
5482                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5483                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5484                         die_error(404, "File or directory for given base does not exist");
5485                 }
5486                 $type = $2;
5487                 $hash = $3;
5488         } else {
5489                 die_error(400, "Not enough information to find object");
5490         }
5491
5492         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5493                                           hash=>$hash, hash_base=>$hash_base,
5494                                           file_name=>$file_name),
5495                              -status => '302 Found');
5496 }
5497
5498 sub git_blobdiff {
5499         my $format = shift || 'html';
5500
5501         my $fd;
5502         my @difftree;
5503         my %diffinfo;
5504         my $expires;
5505
5506         # preparing $fd and %diffinfo for git_patchset_body
5507         # new style URI
5508         if (defined $hash_base && defined $hash_parent_base) {
5509                 if (defined $file_name) {
5510                         # read raw output
5511                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5512                                 $hash_parent_base, $hash_base,
5513                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5514                                 or die_error(500, "Open git-diff-tree failed");
5515                         @difftree = map { chomp; $_ } <$fd>;
5516                         close $fd
5517                                 or die_error(404, "Reading git-diff-tree failed");
5518                         @difftree
5519                                 or die_error(404, "Blob diff not found");
5520
5521                 } elsif (defined $hash &&
5522                          $hash =~ /[0-9a-fA-F]{40}/) {
5523                         # try to find filename from $hash
5524
5525                         # read filtered raw output
5526                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5527                                 $hash_parent_base, $hash_base, "--"
5528                                 or die_error(500, "Open git-diff-tree failed");
5529                         @difftree =
5530                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5531                                 # $hash == to_id
5532                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5533                                 map { chomp; $_ } <$fd>;
5534                         close $fd
5535                                 or die_error(404, "Reading git-diff-tree failed");
5536                         @difftree
5537                                 or die_error(404, "Blob diff not found");
5538
5539                 } else {
5540                         die_error(400, "Missing one of the blob diff parameters");
5541                 }
5542
5543                 if (@difftree > 1) {
5544                         die_error(400, "Ambiguous blob diff specification");
5545                 }
5546
5547                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5548                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5549                 $file_name   ||= $diffinfo{'to_file'};
5550
5551                 $hash_parent ||= $diffinfo{'from_id'};
5552                 $hash        ||= $diffinfo{'to_id'};
5553
5554                 # non-textual hash id's can be cached
5555                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5556                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5557                         $expires = '+1d';
5558                 }
5559
5560                 # open patch output
5561                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5562                         '-p', ($format eq 'html' ? "--full-index" : ()),
5563                         $hash_parent_base, $hash_base,
5564                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5565                         or die_error(500, "Open git-diff-tree failed");
5566         }
5567
5568         # old/legacy style URI -- not generated anymore since 1.4.3.
5569         if (!%diffinfo) {
5570                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5571         }
5572
5573         # header
5574         if ($format eq 'html') {
5575                 my $formats_nav =
5576                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5577                                 "raw");
5578                 git_header_html(undef, $expires);
5579                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5580                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5581                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5582                 } else {
5583                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5584                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5585                 }
5586                 if (defined $file_name) {
5587                         git_print_page_path($file_name, "blob", $hash_base);
5588                 } else {
5589                         print "<div class=\"page_path\"></div>\n";
5590                 }
5591
5592         } elsif ($format eq 'plain') {
5593                 print $cgi->header(
5594                         -type => 'text/plain',
5595                         -charset => 'utf-8',
5596                         -expires => $expires,
5597                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5598
5599                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5600
5601         } else {
5602                 die_error(400, "Unknown blobdiff format");
5603         }
5604
5605         # patch
5606         if ($format eq 'html') {
5607                 print "<div class=\"page_body\">\n";
5608
5609                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5610                 close $fd;
5611
5612                 print "</div>\n"; # class="page_body"
5613                 git_footer_html();
5614
5615         } else {
5616                 while (my $line = <$fd>) {
5617                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5618                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5619
5620                         print $line;
5621
5622                         last if $line =~ m!^\+\+\+!;
5623                 }
5624                 local $/ = undef;
5625                 print <$fd>;
5626                 close $fd;
5627         }
5628 }
5629
5630 sub git_blobdiff_plain {
5631         git_blobdiff('plain');
5632 }
5633
5634 sub git_commitdiff {
5635         my %params = @_;
5636         my $format = $params{-format} || 'html';
5637
5638         my ($patch_max) = gitweb_get_feature('patches');
5639         if ($format eq 'patch') {
5640                 die_error(403, "Patch view not allowed") unless $patch_max;
5641         }
5642
5643         $hash ||= $hash_base || "HEAD";
5644         my %co = parse_commit($hash)
5645             or die_error(404, "Unknown commit object");
5646
5647         # choose format for commitdiff for merge
5648         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5649                 $hash_parent = '--cc';
5650         }
5651         # we need to prepare $formats_nav before almost any parameter munging
5652         my $formats_nav;
5653         if ($format eq 'html') {
5654                 $formats_nav =
5655                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5656                                 "raw");
5657                 if ($patch_max && @{$co{'parents'}} <= 1) {
5658                         $formats_nav .= " | " .
5659                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5660                                         "patch");
5661                 }
5662
5663                 if (defined $hash_parent &&
5664                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5665                         # commitdiff with two commits given
5666                         my $hash_parent_short = $hash_parent;
5667                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5668                                 $hash_parent_short = substr($hash_parent, 0, 7);
5669                         }
5670                         $formats_nav .=
5671                                 ' (from';
5672                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5673                                 if ($co{'parents'}[$i] eq $hash_parent) {
5674                                         $formats_nav .= ' parent ' . ($i+1);
5675                                         last;
5676                                 }
5677                         }
5678                         $formats_nav .= ': ' .
5679                                 $cgi->a({-href => href(action=>"commitdiff",
5680                                                        hash=>$hash_parent)},
5681                                         esc_html($hash_parent_short)) .
5682                                 ')';
5683                 } elsif (!$co{'parent'}) {
5684                         # --root commitdiff
5685                         $formats_nav .= ' (initial)';
5686                 } elsif (scalar @{$co{'parents'}} == 1) {
5687                         # single parent commit
5688                         $formats_nav .=
5689                                 ' (parent: ' .
5690                                 $cgi->a({-href => href(action=>"commitdiff",
5691                                                        hash=>$co{'parent'})},
5692                                         esc_html(substr($co{'parent'}, 0, 7))) .
5693                                 ')';
5694                 } else {
5695                         # merge commit
5696                         if ($hash_parent eq '--cc') {
5697                                 $formats_nav .= ' | ' .
5698                                         $cgi->a({-href => href(action=>"commitdiff",
5699                                                                hash=>$hash, hash_parent=>'-c')},
5700                                                 'combined');
5701                         } else { # $hash_parent eq '-c'
5702                                 $formats_nav .= ' | ' .
5703                                         $cgi->a({-href => href(action=>"commitdiff",
5704                                                                hash=>$hash, hash_parent=>'--cc')},
5705                                                 'compact');
5706                         }
5707                         $formats_nav .=
5708                                 ' (merge: ' .
5709                                 join(' ', map {
5710                                         $cgi->a({-href => href(action=>"commitdiff",
5711                                                                hash=>$_)},
5712                                                 esc_html(substr($_, 0, 7)));
5713                                 } @{$co{'parents'}} ) .
5714                                 ')';
5715                 }
5716         }
5717
5718         my $hash_parent_param = $hash_parent;
5719         if (!defined $hash_parent_param) {
5720                 # --cc for multiple parents, --root for parentless
5721                 $hash_parent_param =
5722                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5723         }
5724
5725         # read commitdiff
5726         my $fd;
5727         my @difftree;
5728         if ($format eq 'html') {
5729                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5730                         "--no-commit-id", "--patch-with-raw", "--full-index",
5731                         $hash_parent_param, $hash, "--"
5732                         or die_error(500, "Open git-diff-tree failed");
5733
5734                 while (my $line = <$fd>) {
5735                         chomp $line;
5736                         # empty line ends raw part of diff-tree output
5737                         last unless $line;
5738                         push @difftree, scalar parse_difftree_raw_line($line);
5739                 }
5740
5741         } elsif ($format eq 'plain') {
5742                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5743                         '-p', $hash_parent_param, $hash, "--"
5744                         or die_error(500, "Open git-diff-tree failed");
5745         } elsif ($format eq 'patch') {
5746                 # For commit ranges, we limit the output to the number of
5747                 # patches specified in the 'patches' feature.
5748                 # For single commits, we limit the output to a single patch,
5749                 # diverging from the git-format-patch default.
5750                 my @commit_spec = ();
5751                 if ($hash_parent) {
5752                         if ($patch_max > 0) {
5753                                 push @commit_spec, "-$patch_max";
5754                         }
5755                         push @commit_spec, '-n', "$hash_parent..$hash";
5756                 } else {
5757                         if ($params{-single}) {
5758                                 push @commit_spec, '-1';
5759                         } else {
5760                                 if ($patch_max > 0) {
5761                                         push @commit_spec, "-$patch_max";
5762                                 }
5763                                 push @commit_spec, "-n";
5764                         }
5765                         push @commit_spec, '--root', $hash;
5766                 }
5767                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5768                         '--stdout', @commit_spec
5769                         or die_error(500, "Open git-format-patch failed");
5770         } else {
5771                 die_error(400, "Unknown commitdiff format");
5772         }
5773
5774         # non-textual hash id's can be cached
5775         my $expires;
5776         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5777                 $expires = "+1d";
5778         }
5779
5780         # write commit message
5781         if ($format eq 'html') {
5782                 my $refs = git_get_references();
5783                 my $ref = format_ref_marker($refs, $co{'id'});
5784
5785                 git_header_html(undef, $expires);
5786                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5787                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5788                 print "<div class=\"title_text\">\n" .
5789                       "<table class=\"object_header\">\n";
5790                 git_print_authorship_rows(\%co);
5791                 print "</table>".
5792                       "</div>\n";
5793                 print "<div class=\"page_body\">\n";
5794                 if (@{$co{'comment'}} > 1) {
5795                         print "<div class=\"log\">\n";
5796                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5797                         print "</div>\n"; # class="log"
5798                 }
5799
5800         } elsif ($format eq 'plain') {
5801                 my $refs = git_get_references("tags");
5802                 my $tagname = git_get_rev_name_tags($hash);
5803                 my $filename = basename($project) . "-$hash.patch";
5804
5805                 print $cgi->header(
5806                         -type => 'text/plain',
5807                         -charset => 'utf-8',
5808                         -expires => $expires,
5809                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5810                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5811                 print "From: " . to_utf8($co{'author'}) . "\n";
5812                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5813                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5814
5815                 print "X-Git-Tag: $tagname\n" if $tagname;
5816                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5817
5818                 foreach my $line (@{$co{'comment'}}) {
5819                         print to_utf8($line) . "\n";
5820                 }
5821                 print "---\n\n";
5822         } elsif ($format eq 'patch') {
5823                 my $filename = basename($project) . "-$hash.patch";
5824
5825                 print $cgi->header(
5826                         -type => 'text/plain',
5827                         -charset => 'utf-8',
5828                         -expires => $expires,
5829                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5830         }
5831
5832         # write patch
5833         if ($format eq 'html') {
5834                 my $use_parents = !defined $hash_parent ||
5835                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5836                 git_difftree_body(\@difftree, $hash,
5837                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5838                 print "<br/>\n";
5839
5840                 git_patchset_body($fd, \@difftree, $hash,
5841                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5842                 close $fd;
5843                 print "</div>\n"; # class="page_body"
5844                 git_footer_html();
5845
5846         } elsif ($format eq 'plain') {
5847                 local $/ = undef;
5848                 print <$fd>;
5849                 close $fd
5850                         or print "Reading git-diff-tree failed\n";
5851         } elsif ($format eq 'patch') {
5852                 local $/ = undef;
5853                 print <$fd>;
5854                 close $fd
5855                         or print "Reading git-format-patch failed\n";
5856         }
5857 }
5858
5859 sub git_commitdiff_plain {
5860         git_commitdiff(-format => 'plain');
5861 }
5862
5863 # format-patch-style patches
5864 sub git_patch {
5865         git_commitdiff(-format => 'patch', -single => 1);
5866 }
5867
5868 sub git_patches {
5869         git_commitdiff(-format => 'patch');
5870 }
5871
5872 sub git_history {
5873         if (!defined $hash_base) {
5874                 $hash_base = git_get_head_hash($project);
5875         }
5876         if (!defined $page) {
5877                 $page = 0;
5878         }
5879         my $ftype;
5880         my %co = parse_commit($hash_base)
5881             or die_error(404, "Unknown commit object");
5882
5883         my $refs = git_get_references();
5884         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5885
5886         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5887                                        $file_name, "--full-history")
5888             or die_error(404, "No such file or directory on given branch");
5889
5890         if (!defined $hash && defined $file_name) {
5891                 # some commits could have deleted file in question,
5892                 # and not have it in tree, but one of them has to have it
5893                 for (my $i = 0; $i <= @commitlist; $i++) {
5894                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5895                         last if defined $hash;
5896                 }
5897         }
5898         if (defined $hash) {
5899                 $ftype = git_get_type($hash);
5900         }
5901         if (!defined $ftype) {
5902                 die_error(500, "Unknown type of object");
5903         }
5904
5905         my $paging_nav = '';
5906         if ($page > 0) {
5907                 $paging_nav .=
5908                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5909                                                file_name=>$file_name)},
5910                                 "first");
5911                 $paging_nav .= " &sdot; " .
5912                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5913                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5914         } else {
5915                 $paging_nav .= "first";
5916                 $paging_nav .= " &sdot; prev";
5917         }
5918         my $next_link = '';
5919         if ($#commitlist >= 100) {
5920                 $next_link =
5921                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5922                                  -accesskey => "n", -title => "Alt-n"}, "next");
5923                 $paging_nav .= " &sdot; $next_link";
5924         } else {
5925                 $paging_nav .= " &sdot; next";
5926         }
5927
5928         git_header_html();
5929         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5930         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5931         git_print_page_path($file_name, $ftype, $hash_base);
5932
5933         git_history_body(\@commitlist, 0, 99,
5934                          $refs, $hash_base, $ftype, $next_link);
5935
5936         git_footer_html();
5937 }
5938
5939 sub git_search {
5940         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5941         if (!defined $searchtext) {
5942                 die_error(400, "Text field is empty");
5943         }
5944         if (!defined $hash) {
5945                 $hash = git_get_head_hash($project);
5946         }
5947         my %co = parse_commit($hash);
5948         if (!%co) {
5949                 die_error(404, "Unknown commit object");
5950         }
5951         if (!defined $page) {
5952                 $page = 0;
5953         }
5954
5955         $searchtype ||= 'commit';
5956         if ($searchtype eq 'pickaxe') {
5957                 # pickaxe may take all resources of your box and run for several minutes
5958                 # with every query - so decide by yourself how public you make this feature
5959                 gitweb_check_feature('pickaxe')
5960                     or die_error(403, "Pickaxe is disabled");
5961         }
5962         if ($searchtype eq 'grep') {
5963                 gitweb_check_feature('grep')
5964                     or die_error(403, "Grep is disabled");
5965         }
5966
5967         git_header_html();
5968
5969         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5970                 my $greptype;
5971                 if ($searchtype eq 'commit') {
5972                         $greptype = "--grep=";
5973                 } elsif ($searchtype eq 'author') {
5974                         $greptype = "--author=";
5975                 } elsif ($searchtype eq 'committer') {
5976                         $greptype = "--committer=";
5977                 }
5978                 $greptype .= $searchtext;
5979                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5980                                                $greptype, '--regexp-ignore-case',
5981                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5982
5983                 my $paging_nav = '';
5984                 if ($page > 0) {
5985                         $paging_nav .=
5986                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5987                                                        searchtext=>$searchtext,
5988                                                        searchtype=>$searchtype)},
5989                                         "first");
5990                         $paging_nav .= " &sdot; " .
5991                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5992                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5993                 } else {
5994                         $paging_nav .= "first";
5995                         $paging_nav .= " &sdot; prev";
5996                 }
5997                 my $next_link = '';
5998                 if ($#commitlist >= 100) {
5999                         $next_link =
6000                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6001                                          -accesskey => "n", -title => "Alt-n"}, "next");
6002                         $paging_nav .= " &sdot; $next_link";
6003                 } else {
6004                         $paging_nav .= " &sdot; next";
6005                 }
6006
6007                 if ($#commitlist >= 100) {
6008                 }
6009
6010                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6011                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6012                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6013         }
6014
6015         if ($searchtype eq 'pickaxe') {
6016                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6017                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6018
6019                 print "<table class=\"pickaxe search\">\n";
6020                 my $alternate = 1;
6021                 local $/ = "\n";
6022                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6023                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6024                         ($search_use_regexp ? '--pickaxe-regex' : ());
6025                 undef %co;
6026                 my @files;
6027                 while (my $line = <$fd>) {
6028                         chomp $line;
6029                         next unless $line;
6030
6031                         my %set = parse_difftree_raw_line($line);
6032                         if (defined $set{'commit'}) {
6033                                 # finish previous commit
6034                                 if (%co) {
6035                                         print "</td>\n" .
6036                                               "<td class=\"link\">" .
6037                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6038                                               " | " .
6039                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6040                                         print "</td>\n" .
6041                                               "</tr>\n";
6042                                 }
6043
6044                                 if ($alternate) {
6045                                         print "<tr class=\"dark\">\n";
6046                                 } else {
6047                                         print "<tr class=\"light\">\n";
6048                                 }
6049                                 $alternate ^= 1;
6050                                 %co = parse_commit($set{'commit'});
6051                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6052                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6053                                       "<td><i>$author</i></td>\n" .
6054                                       "<td>" .
6055                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6056                                               -class => "list subject"},
6057                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6058                         } elsif (defined $set{'to_id'}) {
6059                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6060
6061                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6062                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6063                                               -class => "list"},
6064                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6065                                       "<br/>\n";
6066                         }
6067                 }
6068                 close $fd;
6069
6070                 # finish last commit (warning: repetition!)
6071                 if (%co) {
6072                         print "</td>\n" .
6073                               "<td class=\"link\">" .
6074                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6075                               " | " .
6076                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6077                         print "</td>\n" .
6078                               "</tr>\n";
6079                 }
6080
6081                 print "</table>\n";
6082         }
6083
6084         if ($searchtype eq 'grep') {
6085                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6086                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6087
6088                 print "<table class=\"grep_search\">\n";
6089                 my $alternate = 1;
6090                 my $matches = 0;
6091                 local $/ = "\n";
6092                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6093                         $search_use_regexp ? ('-E', '-i') : '-F',
6094                         $searchtext, $co{'tree'};
6095                 my $lastfile = '';
6096                 while (my $line = <$fd>) {
6097                         chomp $line;
6098                         my ($file, $lno, $ltext, $binary);
6099                         last if ($matches++ > 1000);
6100                         if ($line =~ /^Binary file (.+) matches$/) {
6101                                 $file = $1;
6102                                 $binary = 1;
6103                         } else {
6104                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6105                         }
6106                         if ($file ne $lastfile) {
6107                                 $lastfile and print "</td></tr>\n";
6108                                 if ($alternate++) {
6109                                         print "<tr class=\"dark\">\n";
6110                                 } else {
6111                                         print "<tr class=\"light\">\n";
6112                                 }
6113                                 print "<td class=\"list\">".
6114                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6115                                                                file_name=>"$file"),
6116                                                 -class => "list"}, esc_path($file));
6117                                 print "</td><td>\n";
6118                                 $lastfile = $file;
6119                         }
6120                         if ($binary) {
6121                                 print "<div class=\"binary\">Binary file</div>\n";
6122                         } else {
6123                                 $ltext = untabify($ltext);
6124                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6125                                         $ltext = esc_html($1, -nbsp=>1);
6126                                         $ltext .= '<span class="match">';
6127                                         $ltext .= esc_html($2, -nbsp=>1);
6128                                         $ltext .= '</span>';
6129                                         $ltext .= esc_html($3, -nbsp=>1);
6130                                 } else {
6131                                         $ltext = esc_html($ltext, -nbsp=>1);
6132                                 }
6133                                 print "<div class=\"pre\">" .
6134                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6135                                                                file_name=>"$file").'#l'.$lno,
6136                                                 -class => "linenr"}, sprintf('%4i', $lno))
6137                                         . ' ' .  $ltext . "</div>\n";
6138                         }
6139                 }
6140                 if ($lastfile) {
6141                         print "</td></tr>\n";
6142                         if ($matches > 1000) {
6143                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6144                         }
6145                 } else {
6146                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6147                 }
6148                 close $fd;
6149
6150                 print "</table>\n";
6151         }
6152         git_footer_html();
6153 }
6154
6155 sub git_search_help {
6156         git_header_html();
6157         git_print_page_nav('','', $hash,$hash,$hash);
6158         print <<EOT;
6159 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6160 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6161 the pattern entered is recognized as the POSIX extended
6162 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6163 insensitive).</p>
6164 <dl>
6165 <dt><b>commit</b></dt>
6166 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6167 EOT
6168         my $have_grep = gitweb_check_feature('grep');
6169         if ($have_grep) {
6170                 print <<EOT;
6171 <dt><b>grep</b></dt>
6172 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6173     a different one) are searched for the given pattern. On large trees, this search can take
6174 a while and put some strain on the server, so please use it with some consideration. Note that
6175 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6176 case-sensitive.</dd>
6177 EOT
6178         }
6179         print <<EOT;
6180 <dt><b>author</b></dt>
6181 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6182 <dt><b>committer</b></dt>
6183 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6184 EOT
6185         my $have_pickaxe = gitweb_check_feature('pickaxe');
6186         if ($have_pickaxe) {
6187                 print <<EOT;
6188 <dt><b>pickaxe</b></dt>
6189 <dd>All commits that caused the string to appear or disappear from any file (changes that
6190 added, removed or "modified" the string) will be listed. This search can take a while and
6191 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6192 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6193 EOT
6194         }
6195         print "</dl>\n";
6196         git_footer_html();
6197 }
6198
6199 sub git_shortlog {
6200         my $head = git_get_head_hash($project);
6201         if (!defined $hash) {
6202                 $hash = $head;
6203         }
6204         if (!defined $page) {
6205                 $page = 0;
6206         }
6207         my $refs = git_get_references();
6208
6209         my $commit_hash = $hash;
6210         if (defined $hash_parent) {
6211                 $commit_hash = "$hash_parent..$hash";
6212         }
6213         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6214
6215         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6216         my $next_link = '';
6217         if ($#commitlist >= 100) {
6218                 $next_link =
6219                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6220                                  -accesskey => "n", -title => "Alt-n"}, "next");
6221         }
6222         my $patch_max = gitweb_check_feature('patches');
6223         if ($patch_max) {
6224                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6225                         $paging_nav .= " &sdot; " .
6226                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6227                                         "patches");
6228                 }
6229         }
6230
6231         git_header_html();
6232         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6233         git_print_header_div('summary', $project);
6234
6235         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6236
6237         git_footer_html();
6238 }
6239
6240 ## ......................................................................
6241 ## feeds (RSS, Atom; OPML)
6242
6243 sub git_feed {
6244         my $format = shift || 'atom';
6245         my $have_blame = gitweb_check_feature('blame');
6246
6247         # Atom: http://www.atomenabled.org/developers/syndication/
6248         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6249         if ($format ne 'rss' && $format ne 'atom') {
6250                 die_error(400, "Unknown web feed format");
6251         }
6252
6253         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6254         my $head = $hash || 'HEAD';
6255         my @commitlist = parse_commits($head, 150, 0, $file_name);
6256
6257         my %latest_commit;
6258         my %latest_date;
6259         my $content_type = "application/$format+xml";
6260         if (defined $cgi->http('HTTP_ACCEPT') &&
6261                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6262                 # browser (feed reader) prefers text/xml
6263                 $content_type = 'text/xml';
6264         }
6265         if (defined($commitlist[0])) {
6266                 %latest_commit = %{$commitlist[0]};
6267                 my $latest_epoch = $latest_commit{'committer_epoch'};
6268                 %latest_date   = parse_date($latest_epoch);
6269                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6270                 if (defined $if_modified) {
6271                         my $since;
6272                         if (eval { require HTTP::Date; 1; }) {
6273                                 $since = HTTP::Date::str2time($if_modified);
6274                         } elsif (eval { require Time::ParseDate; 1; }) {
6275                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6276                         }
6277                         if (defined $since && $latest_epoch <= $since) {
6278                                 print $cgi->header(
6279                                         -type => $content_type,
6280                                         -charset => 'utf-8',
6281                                         -last_modified => $latest_date{'rfc2822'},
6282                                         -status => '304 Not Modified');
6283                                 return;
6284                         }
6285                 }
6286                 print $cgi->header(
6287                         -type => $content_type,
6288                         -charset => 'utf-8',
6289                         -last_modified => $latest_date{'rfc2822'});
6290         } else {
6291                 print $cgi->header(
6292                         -type => $content_type,
6293                         -charset => 'utf-8');
6294         }
6295
6296         # Optimization: skip generating the body if client asks only
6297         # for Last-Modified date.
6298         return if ($cgi->request_method() eq 'HEAD');
6299
6300         # header variables
6301         my $title = "$site_name - $project/$action";
6302         my $feed_type = 'log';
6303         if (defined $hash) {
6304                 $title .= " - '$hash'";
6305                 $feed_type = 'branch log';
6306                 if (defined $file_name) {
6307                         $title .= " :: $file_name";
6308                         $feed_type = 'history';
6309                 }
6310         } elsif (defined $file_name) {
6311                 $title .= " - $file_name";
6312                 $feed_type = 'history';
6313         }
6314         $title .= " $feed_type";
6315         my $descr = git_get_project_description($project);
6316         if (defined $descr) {
6317                 $descr = esc_html($descr);
6318         } else {
6319                 $descr = "$project " .
6320                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6321                          " feed";
6322         }
6323         my $owner = git_get_project_owner($project);
6324         $owner = esc_html($owner);
6325
6326         #header
6327         my $alt_url;
6328         if (defined $file_name) {
6329                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6330         } elsif (defined $hash) {
6331                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6332         } else {
6333                 $alt_url = href(-full=>1, action=>"summary");
6334         }
6335         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6336         if ($format eq 'rss') {
6337                 print <<XML;
6338 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6339 <channel>
6340 XML
6341                 print "<title>$title</title>\n" .
6342                       "<link>$alt_url</link>\n" .
6343                       "<description>$descr</description>\n" .
6344                       "<language>en</language>\n" .
6345                       # project owner is responsible for 'editorial' content
6346                       "<managingEditor>$owner</managingEditor>\n";
6347                 if (defined $logo || defined $favicon) {
6348                         # prefer the logo to the favicon, since RSS
6349                         # doesn't allow both
6350                         my $img = esc_url($logo || $favicon);
6351                         print "<image>\n" .
6352                               "<url>$img</url>\n" .
6353                               "<title>$title</title>\n" .
6354                               "<link>$alt_url</link>\n" .
6355                               "</image>\n";
6356                 }
6357                 if (%latest_date) {
6358                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6359                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6360                 }
6361                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6362         } elsif ($format eq 'atom') {
6363                 print <<XML;
6364 <feed xmlns="http://www.w3.org/2005/Atom">
6365 XML
6366                 print "<title>$title</title>\n" .
6367                       "<subtitle>$descr</subtitle>\n" .
6368                       '<link rel="alternate" type="text/html" href="' .
6369                       $alt_url . '" />' . "\n" .
6370                       '<link rel="self" type="' . $content_type . '" href="' .
6371                       $cgi->self_url() . '" />' . "\n" .
6372                       "<id>" . href(-full=>1) . "</id>\n" .
6373                       # use project owner for feed author
6374                       "<author><name>$owner</name></author>\n";
6375                 if (defined $favicon) {
6376                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6377                 }
6378                 if (defined $logo_url) {
6379                         # not twice as wide as tall: 72 x 27 pixels
6380                         print "<logo>" . esc_url($logo) . "</logo>\n";
6381                 }
6382                 if (! %latest_date) {
6383                         # dummy date to keep the feed valid until commits trickle in:
6384                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6385                 } else {
6386                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6387                 }
6388                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6389         }
6390
6391         # contents
6392         for (my $i = 0; $i <= $#commitlist; $i++) {
6393                 my %co = %{$commitlist[$i]};
6394                 my $commit = $co{'id'};
6395                 # we read 150, we always show 30 and the ones more recent than 48 hours
6396                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6397                         last;
6398                 }
6399                 my %cd = parse_date($co{'author_epoch'});
6400
6401                 # get list of changed files
6402                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6403                         $co{'parent'} || "--root",
6404                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6405                         or next;
6406                 my @difftree = map { chomp; $_ } <$fd>;
6407                 close $fd
6408                         or next;
6409
6410                 # print element (entry, item)
6411                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6412                 if ($format eq 'rss') {
6413                         print "<item>\n" .
6414                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6415                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6416                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6417                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6418                               "<link>$co_url</link>\n" .
6419                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6420                               "<content:encoded>" .
6421                               "<![CDATA[\n";
6422                 } elsif ($format eq 'atom') {
6423                         print "<entry>\n" .
6424                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6425                               "<updated>$cd{'iso-8601'}</updated>\n" .
6426                               "<author>\n" .
6427                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6428                         if ($co{'author_email'}) {
6429                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6430                         }
6431                         print "</author>\n" .
6432                               # use committer for contributor
6433                               "<contributor>\n" .
6434                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6435                         if ($co{'committer_email'}) {
6436                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6437                         }
6438                         print "</contributor>\n" .
6439                               "<published>$cd{'iso-8601'}</published>\n" .
6440                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6441                               "<id>$co_url</id>\n" .
6442                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6443                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6444                 }
6445                 my $comment = $co{'comment'};
6446                 print "<pre>\n";
6447                 foreach my $line (@$comment) {
6448                         $line = esc_html($line);
6449                         print "$line\n";
6450                 }
6451                 print "</pre><ul>\n";
6452                 foreach my $difftree_line (@difftree) {
6453                         my %difftree = parse_difftree_raw_line($difftree_line);
6454                         next if !$difftree{'from_id'};
6455
6456                         my $file = $difftree{'file'} || $difftree{'to_file'};
6457
6458                         print "<li>" .
6459                               "[" .
6460                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6461                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6462                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6463                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6464                                       -title => "diff"}, 'D');
6465                         if ($have_blame) {
6466                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6467                                                              file_name=>$file, hash_base=>$commit),
6468                                               -title => "blame"}, 'B');
6469                         }
6470                         # if this is not a feed of a file history
6471                         if (!defined $file_name || $file_name ne $file) {
6472                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6473                                                              file_name=>$file, hash=>$commit),
6474                                               -title => "history"}, 'H');
6475                         }
6476                         $file = esc_path($file);
6477                         print "] ".
6478                               "$file</li>\n";
6479                 }
6480                 if ($format eq 'rss') {
6481                         print "</ul>]]>\n" .
6482                               "</content:encoded>\n" .
6483                               "</item>\n";
6484                 } elsif ($format eq 'atom') {
6485                         print "</ul>\n</div>\n" .
6486                               "</content>\n" .
6487                               "</entry>\n";
6488                 }
6489         }
6490
6491         # end of feed
6492         if ($format eq 'rss') {
6493                 print "</channel>\n</rss>\n";
6494         } elsif ($format eq 'atom') {
6495                 print "</feed>\n";
6496         }
6497 }
6498
6499 sub git_rss {
6500         git_feed('rss');
6501 }
6502
6503 sub git_atom {
6504         git_feed('atom');
6505 }
6506
6507 sub git_opml {
6508         my @list = git_get_projects_list();
6509
6510         print $cgi->header(
6511                 -type => 'text/xml',
6512                 -charset => 'utf-8',
6513                 -content_disposition => 'inline; filename="opml.xml"');
6514
6515         print <<XML;
6516 <?xml version="1.0" encoding="utf-8"?>
6517 <opml version="1.0">
6518 <head>
6519   <title>$site_name OPML Export</title>
6520 </head>
6521 <body>
6522 <outline text="git RSS feeds">
6523 XML
6524
6525         foreach my $pr (@list) {
6526                 my %proj = %$pr;
6527                 my $head = git_get_head_hash($proj{'path'});
6528                 if (!defined $head) {
6529                         next;
6530                 }
6531                 $git_dir = "$projectroot/$proj{'path'}";
6532                 my %co = parse_commit($head);
6533                 if (!%co) {
6534                         next;
6535                 }
6536
6537                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6538                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6539                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6540                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6541         }
6542         print <<XML;
6543 </outline>
6544 </body>
6545 </opml>
6546 XML
6547 }